US2145826A - Sewing machine - Google Patents

Description

Jan. 31,- 1939. l J. P. wels E1'A AL SEWING MACHINE Filed Jan. 2l, 1955 6 Sheets-Sheet l www A ORNEYZS Jan. 3l, 19.39. l.1. P. wEls. ET AL $145,826

SEWING MACHINE ATTORNEW Jan. 31, 1939. v

J. P. WEIS ET AL SEWING MACHINE Filed Jah. 21, 1935 6 Sheets-Sheet 3 v BY Frederic/1F Zele,

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Jan. 31, 1939,

J. P. WEIS ET AL ASEWING MACHINE Filed Jan. 21, 1955 6 Sheets-Sheet 4 INVENTOR Joh/f l. Ml:

ATTORNEY Jan. 31, 1939. 1'v P. wE|s ET AL 2,145,826

SEWING MACHINE Filed Jan. 2l, 1955 6 Sheets-Sheet 5 am: o o "ha au' 5a TINVENTOR .Jam Rhei-5 A TTORNEYE ,Jan. 31, 1939. J. P. was n AL 2,145,826

SEWING MACHINE Filed Jan. `2l, 1955 6 Sheets-.Sheet 6 5./8 fsf f7 l/ WENTOR Jah/1*. Mis Huderwk FZecer lBY Patented Jan. 31, 1939 rl 2,145,826

UNITED STATESLPATENT OFFICE sEwmG MACHINE John P. Weis and Frederick F. Zeler, Nyack, N. Y., assignors to Willcox & Gibbs Sewing Machine Company, New York, N. Y., a corporation oi!v New York Application January 21, 1935, Serial No. 2,806

30 Claims. (Cl. i12-220) 'I'his invention relates to improvements in sew- The main driving mechanism is particularly ing machines, and particularly to a novel and novel for it permits close spacing of the feed and highly eflicient main driving' mechanism wherelooper parts in the under or work supporting arm in inertia is minimized and desirable` very high which is desirable in order to feed small diamspeeds are made possible. It particularly relates eter cylindrical work therearound, and because it 5 to auxiliary or supplementary driving mechais located substantially central relative to the nisms adapted to easily and quickly convert an needle, feeding, 'and loop forming mechanisms open standard sewing machine into a special thereby minimizing inertia to increase the speed sewing machine for actuating one or more auxand performance of the machine.` Another adiliary or supplementary operation units such as vantageous aspect of the main driving mechanism 10 ruillers, trimmers, and the like.` is that one main crank shaft may be used equally One of the .principal objects is the provision well for driving .both transverse and longitudinal yof improved main driving mechanism, for syntype loopers. By having thev main drive shaft chronously operating cooperating needle driving, paralleling the other main operating rods of the l5 loop forming, lubricating and work feeding looper and other cooperating mechanism, a mini- 15 mechanisms, which will be sturdily supported and mum of driving interponents is required- The -well lubricated,- so that it will have a long life central location of the hand wheel adds to the and freedom from repair. y convenience of operation for the operator, afford- Some of the aims in connection with this 0bing ease of operation, and eliminating the fatigue ject are to provide a driving mechanism capable of reaching too far for positioning the needle, 20 `of operating at variable speeds, from minimum to threading, stopping. and Other requirements' 0f Imaximum within the limits and possibilities that the hand wheel. Also, the central location of the sewing threads or the materials will endure the main drive Shaft permits` the use 0f. excep- (e. g. speeds of 5,000 R. P. M. in the formation tionally short erank'shafts and Pitman Connecof stitches -for the seams of garments and other tions to the various driven parts, and thereby 25 sewed articles; in the placing of stitches for reduces inertia, vibration. and noise. ruiliing, tucking, shearing, gathering, and similar Although there have been Previous efforts t0 requirements; and in the formation of orna- Provide a' mein drive Shaft intermediate the 11D- mental and decorative stitches) and todo this Per and lOWer arms, such efforts usually resulted silently and smoothly at all speeds, with a miniin a shft projecting at right angles tOthe arms 30 i mum of vibration and maintenance cost. vund with e handwheel lrleOnVen-ently 10GB-ted at other aims in connection with this ohieotive the front of the machine- The drive and handis to provide an improved operating mechanism wheel at the middle and side of the machine as with a minimum of inertia and one capable of Provided by the present lnVentiOn may be grasped quick acceleration. This aim is important since and manipulated much more edVantageOusly and 35 considerable time may be lost in starting and will not impede the material Ortho OperatOrs stopping if the variousoperating .partsare long work handling movement at the front of the or heavy. The loss of time and production may machine. amount to considerable in a days ru'n of a ma- It is an important object of the present inven- 40 chine that should be started and stopped between tiOn t0 provide 9 mein driving mechanism With 40 ten and nfteen thousand times in a working day s plurality of associated driving connections of eight hours. Ease of control, or operation and which mey in large Dart be assembled eXtrethe minimization of fatigue to the operator are neously of the machine in order to facilitate the of vital importance. final assembly operation of the'complete ma- Several novel features are embodied in the chine; viz., milking it unnecessary fOr the 0D- 45 structure developed to meet this object and the erster t0 DerfOrm many small operatiens Within complementary aims. One of these is the prothe confines of the main frame where his movevision of a main frame/with a hollow trunk ments would be impeded, and thereby considadapted to. locate and support substantially all erably-increasing the output or decreasing the the main driving mechanism, and which is open manufacturing eosts 0fA the Complete machine 50 onthree sides to facilitate initial assembly and and insuring a better nnal fitting and relationadjustment and to make subsequent or field reship of the various interconnected or associated pairs and adjustments easier, but adapted to be operating parts. closed later for thorough lubrication of all mov- Features in connection -with this4 object in- ,lng parts therein. clude a preferably solid main drive shaft with 55 4within the frame, with a novel bearing support therefor, whereupon the outer or free ends of the crank arms or the links, arms, and other connections thereon may be connected to their respective associated mechanisms. A complementary feature includes the provision of a main frame with a trunk having an opening and a suitable cover plate on the bottom and/or the top of the trunk to facilitate initial assembly' of the main drive shaft and its associated crank arms to the trunk and/or to facilitate assembly of the crank arms to associated mechanisms; to

' ations.

repair; and to make adjustments.

Heretofore it has been the usual practice to provide standard sewing machines for regular or plain stitching operations and entirely separate special purpose machines when it is desired to make ornamental stitches, to rutile, trim, effect auxiliary feeding vand divers other ancillary oper- These special machines were usually provided with extra operating rods supported on lugs projecting from the front or rear walls of the top arm, operated very indirectly (usually from the needle operating rod which was in turn driven by a main drive shaft in the lower arm) and because of this general design impeded the operator and because of the several indirect driving connections increased the possibility of breakdown or operating trouble.

In passing, too, it should be noted that in many of the previous efforts to overcome the necessity of special machines for additional or special operations, it has been the usual practice Lto connect attachments to an existing machine in a makeshift manner and to operate these from the outer ends of a light needle operating rod in the upper arm or from light and in many instances previously overtaxed looper and feeding rods in the lower arm. In making such additions to thesev machines sev-eral very marked disadvantages resulted, for in addition to overloading light operating parts and causing undue strain on the machine and frequent breakdowns, this plan had the marked disadvantage of usually making it necessary to secure the attachments to the cloth plate of the machine, thereby hampering the operator considerably and increasing the manufacturing costs of the article being sewed.

In some other forms operating rods supported in auxiliary bosses projecting from the front and/or back of the upper arm of the sewing machine were provided which tended to impede the operators movements at the sewing machine and which in practically every instance were in the nature of auxiliary shafts driven from an upper needle operating shaft, the latter in turn very often being an intermediate shaft driven from a main shaft in the lower arm or in the base of the machine.

It is an important object of the present invention to provide a sewing machine making possible the addition of various auxiliary operation units to the cloth plate in the well known manner but to operate such units by a substantially direct drive from the main drive shaft, rather than indirectly from intermediate operating rods of the needle, looper or feeding mechanisms.

It is another very important object of the present invention to provide a sewing machine which will normally be entirely free of exposed driving connections for auxiliary operating instrumentalities, to have the appearance of the plain or standard sewing machine and more particularly so that the operator will not be impeded in any way, but, which may be easily and quickly provided with various auxiliary operation units for performing divers special operations.

Features in connection with this last object are the provision of auxiliary operation units, and a support and driving connections for these auxiliary units, all of unique and highly advantageous form; adapted when the machine is so converted, to provide a machine which is comparatively free of external operating instrumentalities which would tend to impede the operators normal movements at` the machine. Also, in its preferred form, the units and the supports, and the driving connections therefor are such that a substantially direct driving connection is obtained.

On some sewing machines and on some types of work it is desirable to add auxiliary devices to perform auxiliary operations; but, this was impossible on some sewing machines because only reciprocatory or oscillatory driving shafts were available for use with auxiliary devices, when a completely rotary drive shaft was required for operating the necessary apparatus for the auxiliary operation.y

It is an object of the present invention to provide a sewing machine in which a very efficient rotary drive shaft is available for driving auxiliary operation units, even though the other driving shafts for the regular sewing and feeding operations are of the oscillatory or reciprocatory type.

Other objects, features, and advantages will appear hereinafter.

In the drawings:

Figure 1 is a sectional view, longitudinally through the complete sewing machine of the present invention.

Fig. 1-A is a fragmentary detail view of the presser bar and foot lifting mechanism.

Fig. 1B is a fragmentary view of a modied form of end cap for the main bearing.

Fig. l-C is a fragmentary enlarged view of a driving connection.

Fig. 2 is a horizontal sectional view taken on line 2 2 in Fig. 1.

Fig. 3 is a horizontal sectional View taken on l line 3-3 in Fig. 1.

Fig. 4 is a transverse sectional view through the working or head end of the machine taken on line 4-4 in Fig. 1.

Fig. 5 is a transverse sectional view through the trunk end of the machine, taken on line 5-,5 in Fig. 1.

Fig. 6 is a side view of a simple ruiller unit secured to the front wall of the upper arm.

Fig. '7 is a front view of the ruflier shown in Fig. 6.

Fig. 8 is a side view of a trimming unit on a side wall of the upper arm.

Fig. 9 is a sectional view of the trimming unit taken on line 9-9 in Fig. 8.

Fig. l0 is a view of an upper thread controlling unit, secured to the rear wall of the upper. arm.

Fig. l1 is a sectional view of the unit shown in Fig. 10 taken on the line II--Il in Fig. 10.

Fig. 12 is a side view of a top feed unit secured to a side or to the outer end of the top arm.

Fig. 13 is a front view, partly in section, of the top feed unit shown in Fig. 12.

Fig. 14 is a rear view of a rotary wheel feeding unit secured to a rear wall of the upper arm.

` Fig. is a sectional view of the feeding unit shown in Fig. 14 and taken online l5 5 therein.

' ferential drive of the ruiiler.

. shown in Fig. 24.

Fig. 17 is a front view, partly in section, of the device shown in Fig. 16.

Fig. 1'7-A is a fragmentary top view, partly in section, of part of `the device shown in Figs.

16 and 17.

. lar to that shown in Figs. 8 and 9, but mounted on the work support rather than the upper arm.

Fig. 23 is a sectionalview of the trimmer shown in Fig. 22, on line 23-23 therein.

Fig. 24 is a rearviewof a gear driven work moving unit.

Fig. 25 is a side view of the work moving unit The detailed description which follows, in order to facilitate a quick understanding of the machine of the presentcinve'ntion and its mode of operation, has been broken down into various titled sections. The present invention is not limited to the details of construction and arrangement of parts illustrated in the accompanying drawings for it is capable in whole or in part of other embodiments and thev phraseology employed is for the purpose of description and not of limitation.

Frame and general structure The presentinvention comprises a main frame 39 with an upper ann 3i supportingl a needle operating mechanism 32 and a lower arm 33 for locating and supporting looper and feeding mech- .50- anisms 94 and 35 respectively and forming a work support 36 while a vertical trunk 31 locates and supports the upper and lower armsv relative to each other and locates and houses a main driving mechanism 39.

Although the upper arm 3|, lower arm 93, and the trunk 31 may, within the purview of the present invention be made as separate units, se-

cured to 'each other by screws or the like, they are preferably made of an integral one piece casting, as shown, for simplicity, ease of cleaning, to prevent looseness and misalignment of parts;

and for economy in manufacturing cost.

Upper arm and needle operating mechanism In its present preferred form the upper arm 3i is preferably of rectangular cross section, hollow and tapering through its length, to form a chamber 39 having transverse walls 49 and 4I with bearings 42 and 43 supporting a needle operating v rod 44 for oscillatory movement. At the right hand end as viewed in Figs. 1, 2, and 5 the rod .44 is provided with a yoke 45 adjusted and' secured thereto with a bolt 46 and through an integral arm 41 and a ball and socket joint 49 being connected to a crank arm 49 and to the associated main driving mechanism 39.

At its outer end the rod 44 is provided with an arm 59 having a link connection 5l to the upper end of a needle bar 52 to reciprocate the latter andv a needle 53 carried thereby vertically in suitable bearings 54. A finger 55 on the upper end of the needle bar slides in a suitable slot 56 in the front of a head 51 section of the upper arm 9| to insure steady operation and is provided with a thread take up plate 55. y i

The arm 59 is provided with a yoke 59 and screw 59 toK adjust the needle vertically relative to the work support 96. This yoke 59 and the yoke 45 at ythe opposite end of the rod 44 engaging the adjacent bearings 43 and 42 respectively prevent the rod from shifting lengthwise.

' The head 514also supports a presser bar 60 having a presser foot 6l in its lower end in bearings 62 in the usual manner. A fiat spring 69 connected to a pin 63' engages a ball 64 in the upper end of the presser bar 60 toy press the foot 9i toward the underlying-work support 36 and feed dog 65, while a screw 56 may be turned to impart any desired degree of pressure. c

Hand and foot controls 61 and 68 respectively are provided to move the presser foot 6| relative to the lower arm 36, both being associated with a yoke 69, see Figs. 1, 1--A, 2, and 4 tightened in the desired position on the presser bar with a stud 19 and having a horizontal 'finger 1I sliding in a slot 12 to prevent the presser foot from rotating. The hand control 61, best seen in Figs.

1 and l-Acomprises an overthrow cam 13 pivoted on a stud 14 on an end cover plate 15 engaging the stud 19. In one position a low point- '13a of the cam allows the presser foot to be moved into operative relation with the work support by the spring 63 and in another position the high point 1917 of the cam lifts and maintains the presser foot in a raised inoperative position relative thereto.

The foot control 69 for lifting and lowering the presser .foot 6| includes a lever 16 secured to a cross bar 11 in the upper arm engaging a slot 19 in the vertical finger 19 while the cross bar 11 is provided with an outer lever 80 to which any usual i'oot pedal structure may be secured as by the hole 99. When the pedal is depressed the lever 99 is pulled down and the lever 16 is raised, and the latter through its connection with the finger 19 and presser bar 60 raises the presser The head 51 is, according to the present invention, constructed in a unique manner and provided with very novel auxiliary operating and driving mechanisms. Because the function and operation thereof are in the main ancillary or supplementary to standard or regular operations detailed description will be given after the main driving, feeding, and other regular or standard operating 4mechanisms. are described.

Lower arm y Primarily the lower arm 33 comprises longitudinally extending front and rear walls 9| and A92, with transverse end and intermediate walls 93 and 94 respectively adapted to support an interchangeable wide cloth plate 95 -(and narrow cloth plate, not shown herein but indicated by dot-and-dash lines 95') and to interchangeably support an adaptor plate 96 and throat plate 91 dependent upon needle, stitch, article, and feed requirements. f

'I'he lower arm V33, interchangeable cloth plates and supporting structurefor converting the machinev from a feed lacross to a. feed around the arm machine and other associated novel features are more fully disclosed and claimed in a co-pending application Ser. No. '750,259 filed October 27, 1934.

The lower arm 33 also supports the feeding mechanism 35 comprising a feed dog 65 secured to a carrier 88 by a screw 89. Operative work engaging and work moving relationship between the feed dog S5 and presser foot 6| is accomplished by an oscillating arm 90 secured to a feed lifter rod 9| by a yoke 92 through a flat spring 93 lifting the feed dog 65, and by a rocking finger 94 secured to a feed rocker rod 95 by a yoke 96 and through a spring 91 yconnected to the carrier 88 reciprocating the feed dog. The feed lifter and rocker rods are supported for oscillatory movement in the transverse end wall 83 of the lower arm 33 and in side walls 98 and 99 of the trunk 31 while collars and IOI prevent endwisemovement.

Driving connections |02 and |03 associated with the main drive mechanism 38 and including arms |04 and |05, see Fig. 3 particularly, secured to the rods 9| and 95 respectively, actuate the feed dog 65 in timed relation with the reciprocation of the needle 53.

The feeding mechanism 35 forms the main subject matter of a copending application Ser. No. 747,871 filed Oct. 11, 1934 where it is much more completely described.

The lower arm 33 also locates and supports the looper mechanism 34 which cooperates with the needle 53 or the .complete needle operating mechanism 32 to form what may be termed the sewing mechanism. Although only one-form of looper mechanism (transverse type looper) is illustrated herein, for simplicity of drawings and description, it should be understood that it is within the purview of this invention to use the novel main driving mechanism 38, auxiliary driving mechanisms, and associated auxiliary operation units driven thereby, forming the main subject matter of this invention, with other types of looper mechanisms (for example the longitudinal and universal loopers) disclosed in a co-pending application (Serial No. 745,343, filed Sept. 24, 1934).

The herein illustrated form of looper mechanism 34 comprises a looper carrier |06 interchangeably supporting a looper |01 pivotally mounted on a stud |08 for needle loop taking :and shedding travel relative to the needle 53, in a. direction transversely relative to the line of feed, and pivoted on a sleeve |09 between collars I0 for needle avoiding movement longitudinally relative to the line of feed. This four-motion travel to the looper |01 is accomplished by an upper reciprocatory rod ||I and a lower oscillatory rod II2 :and connection 200 mountedi suitable bearings ||3 and I I4 respectively in the end and intermediate transverse walls 83 and 84 of the lower arm'33 :and the side walls 98 and 99 of the trunk 31, the upper rod beingreciprocated by a driving connection I I5 `and the lower rod being oscillated by anotherv driving connection ||6, both associated with the main drive shaft.

Main drimng mechanism The main driving mechanism 38 is of very novel construction and should be particularly noted.` It

v f comprises a main drive shaft ||1 preferably made of one-piece construction, with a plurality of vcranks A, B, C, D, and E thereon, forming and` supporting balland socket connections ||8, H9, I20,.I2I, and |22, see Figs. .1 and 2 particularly,

with crank arms 49, |23, |24, |25, and` I26.which may be secured in place thereon by merely tightening the usual caps and screws. 'I'hese ball and socket connections are preferably, through screw and lock nut connections associated with the crank arms to complete the driving connections 48, I|5, II6, |02, and |03 to the needle operating mechanism 32, to the looper mechanism 34, and to the feeding mechanism 35 respectively.

Now, it should be particularly noted that, according to the present invention, it is possible to aiix and adjust the ball and socket connections I|8 through |22 to the cranks A through'E extraneously of the frame 30 where it is possible to get at these parts advantageously, viz., without hindrance. In sewing machines where the parts are operated at very high speeds it is important to have the bearings as tight as possible in order to prevent knocking or vibration and yet to have the bearings free enough so that they will not freeze after being operated for a while at high speed and during the subsequent heating of the operating parts. Thus, this feature of the present invention provides a double advantage of marked economy in manufacturing assembly cost and the assurance of just the right fit of the various bearings on the main drive shaft I1. Links, ball and socket connections, etc. on the outer ends of the crank arms may likewise be advantageously assembled extraneously of the trunk 31 as will be described more fully hereinafter.

The main driving mechanism 38 includes a small ball bearing |21 adapted to fit upon one end of the main drive shaft I I1 and to be located and supported in any suitable bore |28 inthe side wall 98 of the trunk 31, and at its opposite end is provided with another ball bearing |29 having an inner race slid upon the shank |30 of the main drive shaft and held in place thereon between a shoulder |32 and a hub |33 on a main driving pulley |34 and the outer race clamped in a recess |35 of a large plate |36 with a flange |31 and screws |38. A flange |39 on the plate |36 engaging with a suitable shoulder on the driving pulley serves to prevent oil leakage, and in addition any suitable and conventional oil retainer may be provided in the cavity between the ball bearing |29, hub |33, and flange |39 of the plate |36. A screw |40 holds the drive pulley |34 in place on the shaft.

The ball bearings |21 and |29 may be assembled to the main drive shaft ||1 ex'traneously of the machine prior to final assembly; but preferably, in order to facilitate assembling the main driving mechanism 38 including the main drive shaft II1 and the associated crank arms A through E, in the trunk 31, the bearings are assembled to the shaft II1 and to the trunk 31 as shown after the shaft and associated cranks are put in place 4,within the trunk. The outer plate |36 is preferably located relative to the trunk by a shoulder I4I fitting within a suitable bore |42 and a ange |43 thereon being clamped in place by suitable screws |44, and the bearing |21 at the other end vof the shaft is held against the shoulder |45 by a cover plate |46 as shown in Fig. 1 or by a similar cover plate |46 as shown in Fig. l-B held in place by suitable screws I 41.

to complete connection of the bearing to thev Walls498 and 99. Also,the large opening |42 `makes it possible to drop the whole main drive mechanism `38 relative to themainvframe and :below the normal axial location of the main to lift and tilt the `upper crank arm and the main drive shaft after the crank arm 49 is in 'the trunk in order to get the crank arms |23 through |25 within the trunk.

After the main driving mechanism is so located assembly of the connection 48 to the needie operating rod 44 may be easily accomplished through a top opening |49, and all the lower connections may likewise be easily accomplished through the lower opening |50. For example, a ball and socket connection |5| including the usual cap and screws at the lower end of the crank arm |23 is made to a bell crank |52 pivotally mounted on a cross rod' |53 which at its lower end has a ball and socket connection |54 to the upper reciprocatory rod If preferred, the bell crank |52 and connection |5| may be assembled to the main driving mechanism 38 extraneously of the machine, in which event connection of the cross rod |53 and lower ball and socket joint v|54 is completed subsequently to placing the main driving mechanism 38 in the trunk. Also, a ball and socket connection including the usual cap and screws may be secured to an arm |55 in order to impart oscillatory movement to the lower rod.

y Similar operating connections 'are effected to the feeding mechanism 35 through completing a ball and socket connection |51 including the usual cap and screws'to the arm |04. The crank E is'connected to an arm |05 carried by the feed rocker rod 95 as by a pin |59 passed through the link |50.

Preferably themain driving mechanism 38, as it is assembled extraneously ofA the machine, in

cludes the bell crank |52, the arms |56, Yand |04, and also the crank |25 with a slot |5| adapted to receive a slide |52 of a feed regulating mechanismA |53 and with the link |50 and arm |05 thereon of the feed rocker rod driving connection |03 whereupon it is only necessary for the assembler to complete the ball and socket connection 48 to the upper needle operating rod 4,0 and to tighten the yoke |54 with screws |55 to the lower oscillatory rod ||2. In like manner the feed lifter rod 9| and feed rocker rod 95 may be slid lengthwise in the frame into yokes |55 and |51 whereupon the latter two may f |19 lengthwise thereof, the slide carrying the pivotvslide block |52 movable in the aperturem m the crazk arm |26, when the pivot |62 is located high in the slot |5| a relatively large movement'is imparted to the 4lower end of the crank arm in order to effect a considerable rocking 'or feeding movement to the feed dog 55, and when it is located lower in the slot, a relatively shorter movement and feed is imparted. The slide block may be simply slid into the aperture |5| when the main driving mechanism 39 is placed within the trunk 31. A pointer |80,

carried by the slide |19 is moved past a graduated scale on a transparent disc |5| on the trunk in order to indicate the extent of feed .or number of stitches per inch.

The feeding and the feed regulating mechanisms 35 and |53 are much more completely described in a co-pending application Ser. No. '747,871 filed Oct. 1l, 1934 wherein its novel features of construction are claimed.

After the driving mechanism 38 and associated parts are properly assembled the upper and lower cover plates |1| and |12 respectively are secured in place, thereby changing the trunk 31 into asubstantially oil tight chamber 31. Oil may be added through the top opening |49 and may be drained through the pet cock |13 in the bottom plate |12. I j f This main driving mechanism 38 located substantially midway between the upper and lower arms and substantially parallel therewith has the -important advantage of providing short substantially equal length driving connections to the needle operating mechanism 32 in the upper arm 3| and to the looper mechanism 34 and the feeding mechanism 35 in the lower arm 33 thus reducing the mass of the individual parts moved, reducing the inertia, and thereby making possible desirable high speed operation. Also, it has the advantage of providing a handwheel control |82 at a point suiiiciently raised from the tablev to prevent the operator from Skinning his knuckles,

and yet not high enough to tire the operator Of particular importance, too, the centrally disposed drive shaft ||1 makes possible the very eilicient lubrication of substantially all of the moving parts within the trunk 31 by spray, gravity, and capillary action. This advantage may briefly be described by referenceto Figs. l through 5 .wherein thereis disclosed a pump |83 driven from the main drive pulley by a belt |84 adapted to draw oil from a reservoir |85 in the bottom of the chamber 31' and to force it upwardly through an eduction tube |95 and to expel it against the underside of the cover plate |1| and to an upper container |81. Some of this oil ows down lthrough a channel |88 into suitable oil entrance holes |89, see-Figs. 1 and 2 respectively into the bearing 42.and.rod 44 to lubricate bearings'oi the needle operating mechanism, and from the lip |90 drops onto the ball and socket connection 48 to lubricate the latter. The bulk of the oil, however, flows from the upper container |81 through a pipe |9| into an intermediate container |92 having outlet ports |93 overlying the cranks A through E. Some of the oil from the latter source drops directly into funnels |94, thence through the ball and socket connections ||8 through |22 through` suitable holes in the crank arms |23 through |25, to the lower associated bearings. VSome of the oil ows down over the side walls or is thrown about by the various operating connections into the ball bearings |21 andy |29, linto the pan |95 for lubricating the bell crank |52, and likewise some of the oil flows orver the side walls 98 and 99 or drops by gravity through holes |96, |91, |98, and |99 in the rods |12, 9|, and 95 respectively in order to lubricate the bearings ||3 and sleeve |09 of the upper rod to lubricate the bearings ||4 and connection 200 of the lower rod ||2, and similarly to lubricate the bearings 20| and 202 throughout the length of the feed lifter and rocker rods 9| and 95 respectively.

The various details and certain modications of this advantageous lubricating system and mechanism are much more completely described and claimed in a co-pending application Ser. No. 755,372 filed Nov. 30, 1934. It is thought that the present brief description is suicient to indicate the advantageous lubrication in part made possible by the present main driving mechanism forming the main subject matter of the present patent application.

Ausciliary driving mechanisms A particularly novel feature of the present invention is the provision of a very eicient and extremely desirable auxiliary driving mechanism 204 and support 205 whereby the sewing machine may be a plain substantially standard sewing machine normally, without outside lugs and auxiliary shafts, and wherein one or more auxiliary operation units for performing special operations may be added to and operated on the machine both easily and quickly.

It is frequently desirable in certain sewing operations to trim the material, to provide auxiliary feeding apparatus for extra thick' or unwieldy materials, to effect special stitch formations, to move plies of material relative to each other, to ruiile, and to perform other ancillary operations.

Heretofore these operations were usually done on` specially built machines or on machines with make-shift attachments ineiciently driven from looper, needle and other intermediate operating rods.

The present invention provides several unique and highly efficient structures for accomplishing these and like functions in a single machine with highly desirable substantially direct driving connections and in a manner to prevent hindrance or obstruction to the operator or to the. work. In its simplest form, illustrated in Figs. 1, 4, 22, and 23, it comprises a connection 206 at one end of the main drive shaft ||1 adapted to receive an extension drive shaft 201. Normally the bearing |21 is enclosed at this point with a plain full cap |46 as shown in Fig. 1-B. However, it may be at all times enclosed by a cap |46 with a bore 208 as shown in Fig. 1 if preferred. Various extension rods (for example the extension rod 201 of Fig. 23 ending short of the support 205 on the upper arm 3|, and the extension rod 201 of Fig. 1 entering the support 205, or the like), may be provided and may be driven by the main drive shaft ||1 as through the adjustable driving connection 206. The latter connection, in its present preferred form, includes an intermediate extension 209 having a screw connection 2|0 to the main drive shaft as shown in Fig. 1 and having a tongue and slot connection 2H including a tongue 2|2 on the shaft 201 and a slot 2|2' on the intermediate extension 209 with a screw 2|3 adapted to prevent the tongue from shifting laterally in the slot 2|2' and to clamp it against lengthwise movement therein.

This tongue and slot connection 2|| has the advantage of making it possible to assemble the extension drive shafts 201 and 201 to the main drive shaft ||1 without interference by the support 205 and permits axial shifting of these extension shafts for special conditions.

Figures 22 and 23 disclose one form of device 2|4 which may be operated directly from the main drive shaft v,| |1 rather than through a very indirect hook-up with a reciprocating needle bar, or from an anxiliary operating rod on the back or on the front of the machine, the means usually resorted to for operating a trimming device close to the needle. This device includes a base 2|4' adapted to be secured to the work support 36 with screws 2|5 and having a standard 2|6 provided with a channel 2|1 housing a slide 2|8 for vertical reciprocatory movement ,under a cover plate.2|9 and having at its lower end a cutter carrier 220 capable of lateral shifting relative to the line of stitching by a screw and slot connection 22| and through another screw and slot connection 222 making possible vertical adjustment of a cutter blade 223 adapted to cooperate with a lower cutter 224 which may, as shown, be formed in the throat plate 81.

Reciprocation of the slide 2|8 is accomplished by the provision of an eccentric 225 secured to the extension shaft 201 by a screw 226 as shown in Fig. 23, the 'collar in turn having a concentric section 221 fitting into a suitable bearing 228 of the standard 2|6 in order to locate and support the outer end of the extension shaft. Each rotation of the extension shaft rotates the eccentric and reciprocates the slide 2 I 8 and cutter 223 once relative to the cooperating cutter 224 to trim the work a predetermined distance from the line of stitching as it is fed.

Thus it will be seen that the present invention provides a direct driving connection between the main'drive shaft ||1 and the trimming unit 229 in order to eiect a sturdy or strong and yet smooth operating condition, and so that no adverse strains are imposed upon remote light or weak operating instrumentalities.

It is within the purview of the present invention to use this direct type of drive with other attachments secured to the cloth plate 85 or work support 36, the trimmer shown in Figs. 22 and 23 being merely illustrative of such use and being sufficient to teach others skilled in the art the method of using this highly eilicient direct drive for other types of devices secured to the work support plate.

Although this mechanism just described has the advantage of providing a direct drive it does have the disadvantage of hindering the operators movements and obstructing the passage of large pieces of work over the work support. In order to overcome this very marked disadvantage the present invention provides a very novel driving mechanism and a support for divers auxiliary operation units.

In its present preferred form this auxiliary driving mechanism 204 andl support 205 for the various operating instrumentalities includes a horn 205 having front, rear, and side walls 230, 23|, 232, and 233 at the outer and lower end of the upper arm 3| as shown in Figs. l and 4, and 6 through 16 particularly.

Preferably these walls 230 through 233 are `machined toprovide a good supporting surface and are each provided with a shoulder 234 to assist in locating operating units in place thereon. Screw holes 235 in diagonally opposite corners, as may be seen in Figs. 6 and 9 are also provided to hold units on the individual walls. As shown,

three walls 230, 23|, and 232 of the horn 206 are made integral with the upper arm to provide a chamber 236 and lthe fourth wall 233 is preferably formed on a cover plate 15 secured to the outer end of the upper arm byscrews 15'. This cover plate facilitates assembly and adjustment of various parts in the upper chamber 39 of the arm 3| and in the lower chamber 236 in the horn. The lower chamber 236 also 'forms a housing adapted to support a transmission mechanism 231 including what is preferably termed a lower horn shaft andan upper horn shaft 238 and 233,

the former being held against axial movement held against axial movement by collars 242 and 2434 at opposite ends thereof. 'I'hese two shafts carry cooperating right angle helical gears 244 and V245 held in place by suitable screws. The shafts 238 and 239 are provided with projecting ends adapted to receivev gears, cams,vand other driving elements and ar driven in unison bythe extension shaft 281 having the tongue and slot connection2|| with the main drive shaft ||1 at one end and having a spline connection 250 in a suitable bore 25| of the lower horn shaft 238 as shown in Figs. 1 and l-C in order to rotate the latter in unison with the main drive shaft.

The spline connection 250 at one end of the extension shaft and the tongue and slot connection 2|| at its other end enables an assembler or operator to quickly convert the machine from a plain sewing machine to af machine capable of driving one or more auxiliary operation units both easily and quickly without vdisassembling or changing any of the other regular operating mechanisms such as the main drive, needle operating, feeding, and looper mechanisms 38, 32, 35y

and 34 respectively. Since the shaft 201 is located ve or six inches above the cloth plateA 85 the work support is entirely free for the operators hands and for the passage of materials, and because it is not mounted exteriorly upon the frame it does not hinder or obstruct the operator in his movements around the machine. Also, the direct drive between the main drive shaft ||1 and the transmission mechanism 231 provides a sturdy positive operating condition without undue strain on other remote operating elements, as would occur if the drive was effected through intermediate operating rods used for other purposes in the sewing machine. The gears 244 and 245 may be covered and the chamber 236 Auxiliary operation units In order to illustrate the novelty and utility of the present invention,various of the operating units to be used in conjunction therewith will nnow be described. rAt least one auxiliary operation unit for each of the sides 230 through 233 is illustrated and described herein.

. Figs. 6 and 7 illustrate one form of auxiliary operation device comprising a simple form or vruilling unit 252 which may be used to change the machine from a regular sewing machine into a ruiiler type sewing machine in but a moment. It comprises a base member 253 adapted to be secured to the front wall 239 of the horn 285 with screws 264 entering tapped holes 235. 'I'he base is provided with arms 255 supporting a cross pin 256 for rotary movement but held against axial movement by a head 251 and collar 258. An arm 259 is secured to the pin 256 with a yoke 268 and at its lower end is provided with a flexible ruining blade 26| adapted to engage materials on the presser foot 6| and thence to move the ruilled material under the presser foot when the feed dog 65 is actuated, in the well known manner of ruiiiing devices. A coil spring 262, between a pin 263 on the arm 259 and a hook 264 on the lower finger, yieldingly maintains the ruiilingblade in operative engagement with the work support.

Oscillatory movement of the arm 259 and resultant back and forth ruilling movement of the blade 26| is accomplished with novel form of drive including an arm 265 secured to the pin 256 with a screw 266 and having an adjusting screw 261 capable of movement toward and from the upper arm 3|. This screw is provided with a ball 268 at its front endV and with an indicator plate 269 at its rear, and a. crank arm 210 having an upper ball and socket connection 21| to the screw 261 and having a lower ball and socket connection 2'12 to an eccentric 213 secured to the projecting end of the upper horn shaft 239 with a set screw 214, serving to oscillate the arm 259 and finger 26| once each time the needle 53 is -reciprocated. By shortening the distance be tween vthe ball 268 and the upper arm 265 a relatively greater movement is imparted to the lower arm 259 and nger 26|; whereas, when the dis tance'is increased a relatively smaller travel is imparted to these two parts with the one eccentric 213. The device may be removed from the sewing machine by merely loosening the set screw 214 from the shaft 239 and by removing the two holding screws 254.

Figures 8 and 9 disclose an auxiliary trimming unit 216 adapted to be secured to the inner side wall 232 of the horn 265. It comprises a base 211 adapted to be secured to the wall 232 with screws 254 entering tapped holes 235 and is provided with a channel 218 adapted to receive a reciprocating slide 219 held therein by a top plate 286 and screws 28|. At its lower end the slide 219 is provided with a cutter carrier 282 capable of adjustment transversely relative 'to the line of feed in a screw and slot connection 283 where it may be clamped in desired position. At one end the carrier 282 is provided with a screw and slot connection 284 for locating and holding a cutter 285 in desired vertical position. This cutter cooperates with a mating cutter 286 preferably formed in the throat plate 81. An eccentric collar 281 is passed through a suitable aperturefin the top plate 280 and base 211 and into an elongated slot 268 in the slide 213 in order to reciprocate the latter. This eccentric is secured in'any desired arcuate position on the extension shaft 201' with a set screw 289 and through rotation of the extension shaft 201' the nam drive shaft In reciprocates the cutter zas similar to that shown in Figs. 22 and 23 and here- `inbefore disclosed in detail, but has the advantage of not obstructing the operators fingers near the line of stitching and of allowing the ered, which is of course impossible when a trimming device is secured to the work support.

Figs. 10 and 1l illustrate another auxiliary operation deviice comprising a form of top thread controlling unit 290 which may be secured to the rear wall 23| of the horn 205', for forming novelty stitches in the manner disclosed more completely in the Weis Patents 1,961,950 and 1,961,951 granted June 5, 1934. It comprises a base 29| adapted to be secured to the rear wall 23| with screws 254 and provided with a thread carrier 292 therein secured in a lever 293 pivoted on a stud 294 to be oscillated relative to the reciprocating needle 53, or needles.

Another lever 295 is pivotally mounted on a stud 296 of a base member 29| and is provided with a U shaped slot 291 adapted to embrace an eccentric 298 secured to the projecting end of the upper horn shaft 239 with a screw as shown in Fig. 11 and has a tongue 295' engaging a U shaped slot 293 in the lower lever 293. A pivot stud 296, capable of vertical movement in a slot 299, provides an adjustable pivot for the lever 295 in order to vary the extent of movement imparted to the lower lever 293 and thread carrier 292, even though the same eccentric 298 is used.

Thus, Figs. 6 through 11 illustrate three different forms of auxiliary operation units 232,

216, and 290 adapted to be secured to three different sides of the upper arm 3| or the horn 205', and all three of `these devices may be on the sewing machine at the same time and operated in desired unison with the regular sewing and feed ing mechanisms.

Figs. 12 and 13 disclose another auxiliary operation unit in the form of an auxiliary feeding unit 300 adapted to be secured to the outer side wall 233 of the horn 205' and to be operated by the lower horn shaft 238. It comprises a base member 30| secured in place with holding screws 254 entering tapped holes 235 in the wall 233. A sleeve 302 with eccentric 303 and 304 is secured to the lower horn shaft 238 as by a screw 305. The eccentric 303 accommodates a collar 306 having a spring connection 301 to a feed dog carrier 308, as shown in Figs..12 and 13. The carrier is provided with an upper feed dog 309 secured in place with a screw 3|0 and reciprocated by a U shaped channel 3|| in a lever 3|2 which has an intermediate pivot 3|3 in the form of a stud adjustable vertically in a channel 3|4 and having at its lower end a ball and slot connection 3|5 to the feed dog carrier 308. The spring connection 301 and a bowed spring 3|6 serve to support the feed dog 309 in a substantially horizontal plane. The spring connection 301 is adapted to place the feed dog 309 down into engagement onto the work and the underlying work support 36 or throat plate 81 for one type of .auxiliary oscillatory feed or to be forced down into engagement with the feed dog 65' as indicated by dotand-dash lines in Fig. 13, the bowed spring 3|6 allowing thev carrier 308 to move downwardly into a parallel position with the underlying work and mating part. Similarly, the eccentric 304 imparts a clockwise rotation to the lever 3|2 about the pivot 3|3 in order to move the carrier 308 and associated feed dog 309 in a work feeding direction when the spring connection 301 has moved the feed dog into operative engagement with the work. Upon further rotation the eccentric 303 through the spring connection 301 lifts the feed dog 309 from the Work, and the lever 3|2 is then oscillated by the eccentric in a counter-clockwise direction, to move the feed dog 309 into a forward position again for feeding a following section of the Work. By lifting the pivot 3|3 in the slot 314 and then tightening it, the distance between the pivot 3|3 and the eccentric 304 is shortened and thereby a greater extent of feeding movement is imparted to the carrier 308 and vice versa.

Thus four different auxiliary operation units have now been described in Figs. 6 through 13 for four different types of operations, all or any one of which may be secured to the various sides of the horn 2 05'; all of which may be operated in unison with the reciprocating needle, looper, or feeding mechanism; and all of which may be free of each other either in securing them to the horn or in their operating relationship to the work or in their relation to main operating mechanisms.

Figs. 14 and 15 illustrate another form of auxiliary feeding unit 3|8 of the so-called rotary wheel type. In some forms of work it is desirable to have a serrated wheel press onto or into the work thereby to feed it in absolute unison with the underlying feed dog 65. 'I'he auxiliary driving mechanism 204 of the present invention makes possible an extremely simple mechanism for this purpose.

In its present preferred form this comprises a main frame 3|9, adapted to be secured to the rear Wall 23| of thehorn 205' with screws 254,

having a rearward extension 320 supporting a conventional ball or roller type clutch 32| and a downward extension 322 supporting an intermediate driving mechanism 323. The latter extension supports a slide 324 carrying a feed wheel 325 with a serrated feeding edge 326 in the form of right angle helical teeth engaging with right angle helical teeth of a lower gear 321 driven vby a shaft 328 and upper gear 329 associated with a large gear 330 secured to a shaft 33| projecting downwardly from the clutch 32|.

Step-by-step rotary movement to the clutch 32| and to the feed Wheel 325 through the gears just described is accomplished by a lever 332 pivoted on a stud 333 and a nger 334 engaging with a slot 335 in the cover plate 336 of the clutch when an eccentric 331 on a sleeve 338 secured to the projecting end of the upper horn shaft 239 is rotated. The extent of movement given to the feed wheel 325 and tothe clutch 32| is varied by moving the pivot 333 into various vertical positions in the slot 340.

The slide block 324 is held ina suitable channel section of the lower extension 322 by a suitable plate 34| and is urged toward the underlying work and feed dog by a spring 342 with the desired degree of pressure. Also, a pin 343 is provided in the slide to engage with the notch 344 in the presser bar 60 in order to be lifted away from the work support conjointly with the regular presser foot either by the foot control or the hand control 61 as will be apparent by viewing Fig. 15.

In some instances it may be preferable to mount an auxiliary operation unit on one side of the machine and have-it operated by a driving mechanism on another side of the machine. Such an embodiment is illustrated in Figs. 16, 1'1, and 17A, comprising a ruler unit 346 with a variable feed mechanism 341. In detail it comprises a base member 348 secured to the front wall 230 of the horn 205 with screws 254 having an integral arm 349 supporting a pin 350 which is provided with an arm 35| secured thereto with a yoke 352 having a spring finger 353 at its lower end, which, so far, is very similar to the ruiiling feeding movement to the ruiiier blade 353 relative to the regular feeding mechanism 35 of the sewing machine.

An eccentric 35| on the outer end of the extension rod 251 accommodates a crank arm 352 whichvat its other end is connected to a vshank 353 on the slide 355 and thereby imparts osciliatory' movement to the arms 35| and 355 and to the blade 353 each time the main drive shaft ||1 is rotated. 1

' A sleeve 354 is provided with a bore 355 adapted to clear the extension shaft 251' and toset upon a concentric shoulder 355 of the eccentric 35| at one end and upon a collar 351 at its opposite end, and is provided with a link connection 358 to an arm`359 to control the differential feed mechanism 341. An arm 315 is preferably con-- nected to any foot pedal arrangement by a wire 31| as shown in Fig. 17. The link connection 358 includes-- the arm 358 i'lxed to the outer end of the sleeve 354 having a pin-connection 312 to a link 358-which in turn has a pivotal mounting upon the shank 353 of the slide 355 as shown in Fig. 1'1.

'Ijhe link 358 pivoted on the stud 312 serves to move the slide 355 and plunger 351 vertically in the T slot 355 to any of the notches 358, 359, and

, 355 and also allows the arm, driven by the eccentric 35|, to impart oscillatory movement to the arm 354 and to associated parts.

Any of the now welll known foot controls may be secured to the arm 315 at the opposite end i -may be moved into the two-to-one notch 358,

or into the three to one notch 355. These ratios -are merely illustrative and may be 5 to 1--10-to 1,

and other ratios as desired.

Modified auxiliary drive With the auxiliary 'driving mechanism 254 so far described and the transmission 231 it is possible to change a unit from one side to one other side; for example, to change the trimming mechanism shown in Figs. 8 and 9 from the inner side wall 232 to the outer side wall 233. However, it is not possible to place this same unit onto either the frontwall or rear wall 235 and 23|arespectively, because the drive shaft 239 is in an upper corner of the walls 235 or 23| rather-than substantially in the center of the wall, e. g.-v shaft While it is true that 4this does not represent a major handicap since the cost of the auxiliary operation units is very small and the place of connection more or less standardized, it is desirable in some types of manufacturing set-up to be able to change the units from one side to the other and therefore it would be a real advantage to have the auxiliary operation units fully universal or fully interchangeable on the four sides of the support.

Figs. 18 through 21 disclose a modied form of auxiliary drive in which these desirable fully universal characteristics may be obtained and wherein a driving connection projects from all four of the walls 235 through 233 at a substantiallycentrai point so that an auxiliary operation unit on one side may be moved to any one of the three other s ides for use. This modied form of drive 254' includes a plurality of beveled gears 315, 315, 311, and 318 mounted for axial and rotary movement in suitable bearings 315 in each of` the side walls 235 through 233 of the horn 255.l The beveled gears 316 and 318 in the side walls 232 and 233 are provided with a stud 385 having a solid pin connection 38| to the gear 315 and having a key 382 and slot 383 connection to the other gear 318 which makes possible the use of the extension shaft 251' already described in detail which has the splined connection 255 with the beveled gear 315 in a bore 384 thereof. The stud 385 is of small enough diameter to clear between the presser bar and the needle bar; thus, the beveled gears .315 and 318 are rotated coordinately in unison with the extension shaft 251.

The beveled gears 315 and 311 on the front and rear walls 235 and 23| of the horn 255 may be meshed with either of the side bevel gears 318 and 318 in order to effect R. H. or L. H. rotation; viz., when meshed with the beveled gear 315, as shown in Figs. 18 through 20, rotation of one hand occurs, and if meshed with the beveled gear 318, rotation of the other hand occursand in any event all four gears may, through the stud 385, be rotated coordinately. i

As shown iriFig. 20 the gears 315 and 311 are meshed with the beveled gear 315 in order to be driven by the latter, and the remaining beveled gear 318 is mounted in an inoperative position relative to these two driven gears by pulling a shank 385 thereof outwardly relative to the wall 233 and by tightening a screw 385 and collar 381 in a secondary notch 388 whereupon the beveled gear 318 serves merely to provide a bore or socket 384 to operate any device attached t'o the side wall 233. The beveled gear 315 may likewise be shifted to an out position whereupon the beveled gear 318 may be moved to an in position with the set screw 385 in a primary notch 388 whereupon it serves as a socket to drive units on the side wall 233 and to drive either or both of the bevel gears 315 and 311 and auxiliary working units associated therewith. If desired to use onlythe front or the rear bevel gear` 315 or 311 as a driver for such an auxiliary unit the unused front or rear bevel gears may be moved to, and maintained in the inoperative position by the collar 381.

The presser bar,needle bar, controlling and operating mechanismstherefor, and the feeding mechanism of the sewing machine may be the same as has already been described in detail and it is therefore felt that further detailed description seems unnecessary in connection with this odiiled form of drive shown in Figs. 18 through Modified cam, gear, and like driving elements may be used advantageously with this modified auxiliary driving mechanism and are briefly shown in Fig. 21.

Any Aof the beveled gears 315 through 318 are held in the operative position.I with the collar 381 out on the shank 385, with the set screw 386 in the primary notch 389, and with the collar against the wall by any suitable counterbore 390 with a flange like section 39| on the base of the unit being used, the latter allowing rotary and preventing axial movement of the collar and gear. This, or any modified form of this counterbore on the base of the auxiliary operation units serves this purpose and will be clearly understood by reference to Fig. 21G. Further, this counterbore may be modified to accommodate and retain various driving elements in the socket 384.

This feature of the invention can be clearly understood by reference to Figs. 21A, B, D, and G which illustrate how the counterbore 390 on the base 253' (e. g. modified support for the ruliier shown in Figs. 6 and 7) would be used in this form of the invention. The counterbore 390 engages the collar 381 keeping the bevel gear 315 in engagement with either the side gears 318 and 318 whereupon it is merely necessary to slide a shank 392 with a key 393 of an eccentric 213' into the socket 384 of the bevel gear in order to provide an eccentric driving connection for the remainder of the ruiiling apparatus shown in Figs. 6 and 7.

If preferred, the base member 253' may be provided with an integral cast or a pressed metal finger 394 as shown by dot-and-dash lines in Fig. 21'-G in order to engage the outer end of the eccentric element 2 ID to prevent it from working out of the socket. The gear 395 shown in Fig. 21-C may be similarly held in place, 'or like the eccentric shown in Fig. 21-E and the pin.

and plate driver shown in Fig. 21-F, may preferably be held in place primarily by having a counterbore, similar to the counterbore 390 but of sufcient depth so that the flange 39| sets over the flange-like sections 396 and 391, thereof, to retain these driving elements and the associated beveled gear in operative position. 'I'hese changes are but minor matters of depth or proportion well within the scope of mechanics in this art and itis thought that further description is unnecessary.

Figs. 22 and 23 illustrate the trimming device secured to the work support and have been described in detail hereinbefore.

Figs. 24 and 25 illustrate a further form of auxiliary operation unit advantageously made possible by either of the auxiliary driving mechanisms of the present invention. It illustrates the advantages of the rotary auxiliary drive shaft provided by the present invention (even though the upper arm and lower arm shafts are all of the oscillatory and reciprocatory type).

This unit 400 comprises a base member 40| secured to the rear wall 23| of the horn 205' provided with a rear extension 402 supporting an intermediate shaft 403 having a worm gear 404 at its upper end meshing with a worm 405 secured to the projecting end of the upper horn shaft 239 as by a screw 406` and having an eccentric 401 at its lower end engaging with a slot 408 in the rear of a lever 409 so as to oscillate the latter about a pivot screw 4|0 and thereby to move a guide sleeve 4|| at the front end thereof laterally relative to the line of stitching and to the line of feed. This sleeve guides a tape. or the like in order to obtain a so called serpentine effect, for the sleeve is moved slowly and carries the center of a tape to the right and to the left of the line of stitching, like a ric rac braid.

A slot 4|2 in a lower extension 4|3 of the'base member 40| provides a sturdy support for the lever 409 in its oscillatory movement and a suitable aperture 4|4 is provided in the lever to clear the needle and presser bars.

Although the present invention has been illustrated and described in connection with auxiliary operation units securable to the different sides of a horn on the upper arm, and eventhough the invention has great utility because of the manner in which these working units may be secured one or more interchangeably on the arm 3i, it is within the purview of this invention to provide sewing machines in which the operating units may be made integral with the -arm and y still have the advantage of the unique substantially direct drives provided by the present invention.

However, such a rigid structure would tend to negative the primary object of the present invention for the machine would not be clear of these units when it is desired to use it for just plain stitching operations. Also, the support 205 need not be in the form of a horn 205 with four sides 230 through 233 for conceivably it might be made on the front, end, and back walls of a large cross section upper arm without a downwardly projecting horn, but in such an event the advan- I tageous inner wall 232 would be lacking. The present preferred structure has been illustrated and described.

Other variations and modifications may be made within the scope of this invention and portions may be used Without others.

Having thus explained the nature of our invention and described a way of constructing and using the same, although without attempting to set forth all the forms in which it may be made, or all of the modes of its use, we claim:

1. In a sewing machine the combination of a frame; sewing mechanism; feeding mechanism; a main driving mechanism including a plurality of crank arms; a -trunk in said frame having side openings adapted to pass and receive said driving mechanism with the crank arms from a point exteriorly thereof to a point within and having at least one vertically located opening to connect the cranks to said sewing and feeding mechanisms; means-for closing said side openings and for supporting said driving mechanism within the trunk; and other means for closing the vertically located opening.

2. In a sewing mechanism the .combination of a frame; an upper arm; a lower arm; sewing mechanism; feeding mechanism; driving mechanism a trunk between the upper and lower arm; and a main drive shaft in said driving mechanism `substantially midway of and parallel with the upper and lower arms, adapted to operate said sewing and feeding mechanisms.

3. In a sewing machine the combination of a frame; sewing mechanism; driving mechanism;-

a main drive shaft; a pair of ball bearings on said main drive shaft; a trunk in said frame having a pair of side openings; and means adapted to locate and support said main drive shaft and associated ball bearings in the side openings of the trunk and to prevent axial movement of -the main drive shaft. i

4. In a sewing machine the combination of a almeno frame having upper and lower arms and an intermediate trunk; a work support on said frame; a sewing mechanism; a main driving mechanism; an auxiliary operation unit on said work support; ya main drive shaft in said trunk substantially midway between the upper and lower arms; and an" extension shaft on saidmain drive shaft forming an auxiliary drive for said unit.

6.,In a sewing machine the combination of a framehaving upper and lower arms and an intermediate trunk; a sewing mechanism; an auxiliary operation unit; a support on said upper arm for said unit; a main drive shaft in said trunk substantially midway between the upper and lower arms: and an extension shaft on said main drive shaft forming an auxiliary drive for said unit. Y I

'7. In a sewing machine the combination of a frame; sewing` mechanism; main driving mechanism; an upper arm; an auxiliary operation unit; a wall on the upper arm adapted to support said auxiliary loperation unit; and auxiliary driving mechanism adapted to operate the unit supported on Vsaid wall.

. 8. In a sewing machine the combination of a frame; sewing mechanism; driving mechanism; a plurality of walls on said frame; an auxiliary operation unit attachable to one of said walls; an auxiliary transmission mechanism within said walls; and means connecting said transmission mechanism an said auxiliary operation unit to said main driving mechanism for coordinate operation.

9. In a sewing mechanism the combination of ai erate the auxiliary operation unit.

10. In a sewing machine the combination of a y frame; sewing mechanism; a main driving mechanism; walls on said frame; an auxiliary driving mechanism within said walls vand associated with the main driving mechanism; an auxiliary operationvunlt on one of said walls; a driving member between said auxiliary driving mechanism and saidvauxiliary unit; and means for altering the direction of rotation oiv said member while the main driving mechanism rotates in only direction.

11. In a sewing machine the combination of a i frame; an upper arm; walls on the upper arm adapted to support auxiliary operation units; a

One

walls; a driving member between said socket and said auxiliary operation unit for operating the latter; andauxiliary driving mechanism between said main driving mechanism and said sockets.

13. In a sewing machine the combination of a frame; sewing mechanism; main driving mechanism; a support; a plurality of walls on said support for auxiliary operation units; an auxiliary driving mechanism; and a pair of shafts in said auxiliary driving mechanism at right angles to each other and projecting through and from said walls.

Vi4. In a sewing machine the combination of a frame; a horn on said frame; an inside wall .on said horn; an auxiliary operation unit attachable to said wall; sewing mechanism; feeding mechanism; a main driving mechanism; and a shaft extending from said main driving mechanism to said inside wall and adapted to operate the unit on the wall.

l5. In a sewing machine the combination of a frame; a sewing mechanism; a main driving mechanism including a main drive shaft; a support on said frame; auxiliary operation units on said support; an auxiliary driving mechanism in said support associated with said units; andV a shaft extending from said main drive,l shaft to said auxiliary driving mechanism.

16. In a sewing machine the combination of a frame; a sewing mechanism; a main driving mechanism; walls on said frame; auxiliary operation units interchangeably securable to said frame; and means associated with said main driving mechanism adapted to operate said interchangeable units. 17. In a sewing machine 4the combination of a frame; a horn on said frame; walls on said horn; sewing mechanism; a main driving mechanism; auxiliary operation units adapted to be secured to said walls; and means adapted to drive said auxiliary operation units on two or more walls.

18. In a sewing machine the combination of a frame; sewing mechanism; a main driving mechanism; a horn having inside and-outside walls; auxiliary operation units securabie to said walls; and a drive shaft extending from said main driving mechanism through said walls and adapted to operate said units.

19. In a sewing machine the combination of a frame; sewing mechanism; driving mechanism; a main drive shaft; a pair of bearings on said main drive shaft; a trunk in said frame having a pair of side openings; and means adapted to locate and supportysaid main drive shaft and associated bearings in the side openings of the trunk and to prevent axial movement of the main drive shaft.

20. In a sewing machine the combination of a frame; sewing mechanism; a main driving mechanism; a main drive shaftin said driving mechanism; anlauxiliary operation unit; and an extension on said main drive shaft adapted to opera-te said unit coordinately with the sewing mechanism.

, 21. In a sewing machine thecombination of a frame having upper and lower arms and an intermediate trunk; a work support on said iframe;

operation unit; a support on said upper arm for said unit; a main drive shaft in said trunk substantially midway between the upper and lower arms; and an extension on said main drive shaft forming an auxiliary drive for said unit.

23. In a sewing machine the combination of a frame; sewing mechanism; driving mechanism; a wall on said frame; an auxiliary operation unit attachable to said wall; an auxiliary transmission mechanism within and adjacent said wall; and means connectingsaid transmission mechanism and said auxiliary operation unit to said driving mechanism for coordinate operation.

24. In a sewing mechanism the combination of a frame having upper and lower arms and an intermediate trunk; sewing mechanism; feeding mechanism; driving-means for said sewing and feeding means including only oscillatory and reciprocatory shafts in the upper and lower arms; a main drive shaft adapted to operate the driving means; an auxiliary operation unit; and an extension on said main drive shaft having completely rotary movement, adapted to operate the auxiliary operation unit.

25. In a sewing machine the combination of a frame; sewing mechanism; a main driving meehanism; an auxiliary driving mechanism; an auxiliary operationunit; a driving member between said auxiliary driving mechanism and said auxiliary unit; and means for altering the direction of rotation of said member even though the main driving mechanism rotates only in one direction.

26. In a sewing machine the combination of a frame; sewing mechanism; main driving mechanism; a support; a plurality of walls on said support for auxiliary operation units; and an extension on said main driving mechanism extending to at least one of said walls to operate an auxiliary operation unit on the wall. I

27. vIn a sewing machine the combination of a frame; sewing mechanism; main driving mechanism; a support; a plurality of walls on said support for auxiliary operation units; auxiliary driving mechanism; members in said driving mechanism at an angle to each other and in said plurality of walls; and beveled gears for effecting coordinate operation of said members.

28. In a sewing machine the combination of a frame; sewing mechanism; main driving mechanism; a support; a plurality of walls on said support for auxiliary operation units; auxiliary driving mechanism; members in said driving mechanism at an angle to each other and in said plurality of walls; and a worm and worm gear for effecting coordinate operation of said members.

29. In a sewing machine the combination of a frame;-an upper arm on the frame; a horn on the upper arm; a plurality of walls on said horn, for supporting auxiliary operation units; auxiliary driving mechanism;. and members in said auxiliary driving mechanism in said plurality of walls and at an angle to each other.

30. In a sewing machine the combination of a frame; a main driving mechanism; an upper arm adapted to support auxiliary operation units; an auxiliary driving mechanism associated with said upper arm; and an intermediate shaft adapted to connect said main and auxiliary driving mechanisms, and to be connected and disconnected to these without disturbing same.

JOHN P. WEIS. FREDERICK F'. ZEIER.

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