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US2149110A - Buttonhole sewing machine - Google Patents

Buttonhole sewing machine Download PDF

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Publication number
US2149110A
US2149110A US156136A US15613637A US2149110A US 2149110 A US2149110 A US 2149110A US 156136 A US156136 A US 156136A US 15613637 A US15613637 A US 15613637A US 2149110 A US2149110 A US 2149110A
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United States
Prior art keywords
buttonhole
stud
eye
groove
cam
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Expired - Lifetime
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US156136A
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English (en)
Inventor
Samuel W Avis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reece Button Hole Machine Co
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Reece Button Hole Machine Co
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Publication date
Application filed by Reece Button Hole Machine Co filed Critical Reece Button Hole Machine Co
Priority to US156136A priority Critical patent/US2149110A/en
Priority to GB31640/37A priority patent/GB511493A/en
Priority to DEI59649D priority patent/DE680523C/de
Priority to FR829942D priority patent/FR829942A/fr
Application granted granted Critical
Publication of US2149110A publication Critical patent/US2149110A/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/06—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates

Definitions

  • This invention relates to button hole sewing machines, and more particularly, though not exclusively, to a machine of the eye and fly bar a type, that is to say, a. machine for sewing button holes having an eye at one end and a socalled fly bar at the other end.
  • Fig. 1 is a plan view of a machine embodying the present invention.
  • Fig. 2 is a side elevation partly in section, of the machine
  • Fig. 3 is a bottom view of the machine.
  • Figs. 4 to 9, inclusive illustrate examples of various types of button holes which the machine is capable of sewing.
  • Fig. 10 is a diagrammatic illustration of cer-' tain cooperating elements of the machine, showing more particularly the extent to which these 5 elements can be adjusted for sewing button holes of various types and sizes.
  • Fig. 10a illustrates diagrammatically the extent to which certain dimensions of a button hole may be varied upon adjustment of the coopera 1o ing elements in Fig. 10.
  • Fig. 11 is an enlarged fragmentary view of part of the machine as illustrated in Fig. 1, and
  • Fig. 12 is a fragmentary side elevation of that part of the machine which is illustrated in Fig. 11. a
  • Figs. 13 and 14 are sections taken on the lines 20 13-43 and l4ll, respectively, of Fig. 12.
  • Figs. 15 and 16 are enlarged, fragmentary views of certain elements of the lateral feed mechanism in different positions of cooperation.
  • Fig. 17 is an exploded perspective view of the guide block shown in Fig. 12.
  • Fig. 18 is an enlarged fragmentary section, taken substantially on the line llll of Fig. 2.
  • Fig. 18a is a fragmentarysection, showing certain cooperating elements of the lateral feed mechanism in Fig. 18 in a. different cooperative relation to each other.
  • Fig. 19 is an elevation, partly .in 'sectlon, of a part of the lateral feed mechanism as viewed in the direction of arrow IS in Fig. '18.
  • Fig. 20 is a plan view of certain cooperating elements of the lateral feed mechanism as viewed in the direction of arrow 20 in Fig. 219..
  • Fig. 21 is a fragmentary side elevation 01 the 0 cooperating elements shown in Fig. 20.
  • Fig. 22 is a section taken on the line 22--22 at Fig. 19.
  • Fig. 23 illustrates certain cooperating elements of the lateral feed mechanism as viewed in the 45 direction of arrow 23 in Fig. 18.
  • Fig. 24 is a bottom view of certain cooperating structure of,the machine, and is viewed in the direction Jr arrow 24 in Fig. 2.
  • Fig. 25 is a view similar to Fig. .24 showing the 50 same structure in a different cooperative relation, however.
  • Fig. 26 is an enlarged, fragmentary section, taken substantially on the line 26-26 or Fig. 24.
  • buttons holes which a machine embodying the present invention, is capable of sewing.
  • Each button hole includes the usual slit s which, in some instances, terminates in an enlarged opening that constitutes an eye e, the hole being finished and surrounded by the usual button hole stitches.
  • the button hole stitching includes two parallel lines of stitching a, a along the straight edges of the slit s, said lines of stitch- I .ing being connected at one end by offset stitches c, c with two superimposed lines of stitching b, b
  • the stitches a, a are also connected at the opposite end by offset stitches d, d with radially disposed stitches I which, together with the stitches d, d,
  • Fig. illustrates a button hole, the slit s of which is longer and the eye opening'e of which is larger than in Fig. 4. Consequently, the lines of stitching a, a. are accordingly longer, and the stitches d, d are offset to a greater extent, and extend longitudinally of the slit s for a. greater distance, than the corresponding stitches in Fig.
  • the opening e and the offset stitches d, d are omitted, and the stitches a, a are directly connected by the radially disposed stitches I, thus constituting a button hole which is eyeless.
  • the stitches c care less offset than the corresponding stitches in Fig. 4, with the result that the stitches b, b are Snot-completely superimposed but are merely over- [-"lapped to form a broader fly bar which is also somewhat shorter than that shown in Fig. 4.
  • the button hole shown in Fig. 8 has a fly bar and an eye, the latter being oblong in shape and relatively narrow.
  • the button hole shown in Fig. 9 has no fly bar but an eye which is oblong in shape and relatively broad.
  • the invention is herein shown as embodied in a machine of the general type disclosed in the Kiewicz patents, No. 1,696,893, issued December 25, 1928, and No. 1,726,153, issued August 27, 1929, and in certain other prior patents referred to therein.
  • such a machine comprises a stationary bed 40 which is provided with suitable work clamps 4
  • the stitch forming device comprises a laterally jogging needle 43 and cooperating loopers (not shown), as well as actuating mechanism therefor including a stitching control mechanism, generally indicated at 44 in Fig. 2, for controlling the start and finish of the stitching operation.
  • the stitching head 42 is moved longitudinally over the bed 40 by a main cam 45 which is carried by said head and rotated by a power driver indicated at 46. (Fig. 2), said cam having in one face a cam groove 41 in which rides an antifriction roller 48, carried by a stud 49 which is secured to the bed 40.
  • the stitching head 42 reciprocates once longitudinally of the button hole through a distance A (Fig. a) which is invariable and determined by the shape of the cam groove 47 in the main cam 45. More particularly, the stitching head moves first rearwardly in the direction of arrow X (Fig. 4) from a fixed starting point .8 (Fig. 10a) to a fixed point of reversal R and returns in the direction of arrow Y (Fig. 4) to the starting point S where the machine is stopped by a main stop mechanism (not shown).
  • the location of the stitching at the extreme end of the eye e of a button hole is flxed and determined by the point of reversal of the reciprocatory movement of the stitching head, while the location of the end of the stitching at the bar em; b, and consequently the over-all length of the entire stitching, is determined by coincident points in the rearward and return movements of the stitching head at which the operation of the stitch forming device is started and stopped, re-
  • the stitching control mechanism 44 is controlled by a cam bar 50 (Figs. 1 and 2) which is longitudinally adjustably attached, as hereinafter described, to a callbrated index plate 5
  • the needle 43 and cooperating loopers are carried by turrets' 53 and 54, respectively, which are carried by the head 42 and rotated through a semi-revolution in one direction at the eye end of the button hole to position the outwardly diverging stitches f (Figs. 4 to 9) as well as to condition the stitch forming device for placing the stitches a, c and d at the other side of the button hole slit 3, and
  • Machines of this type are also provided with a lateral feed mechanism whereby the longitudinal reciprocation of the stitching head may be compounded with lateral movements to obtain a resulting movement of the needle and cooperating loopers of the stitch'forming device around a buttonhole which may include an eye of a fly bar or both, according to requirements, as will be more fully explained herein.
  • the lateral motions of the stitching head are slight rocking motions about the axis of a stud 55 (Fig. 2) which is carried by an arm 56, fast on a stud 51 which is suitably secured to a cam casing 6
  • the stud 55 is journalled in a slide 59 which is guided for movement longitudinally of the bed in guideways 60, provided by said bed.
  • forms a part of the stitching head 42, wherefore both are movable in unison.
  • the stud 55 is, therefore, a pivot for the stitching head 42 which is floating longitudinally of the bed to permit the reciprocation of said head relative to the bed.
  • the floatability of the pivot 55 secures the added advantage of giving way to any longitudinal motions of the head which are not solely caused by the rotation of the main cam 45, but by a slight rocking motion of said rotating cam relative to the stationary follower 48 during the rocking of the head by the lateral feed mechanism.
  • Such superimposed longitudinal motions of thehead 42 position the offset stitches c, c (Figs. 4, 6 and 8) mechanism of this general character. in shown, this mechanism is as follows:
  • the present inven-' tion relates to a novel and improvedlateral feed As here- Referring now more particularly to Figs. 2, '3
  • the main cam 4 has in its lower face a cam'groove 62 with which cooperates an anti-friction roller 63 (Fig. 26) on a stud 64 which is carried by a lever 65, pivotally mounted at 66 to the outside of the cam casing 6
  • This cam casing is provided with an oblong slot6l through which the stud 64 projects into the inside of said casing so that the roller 63 may cooperate with the cam groove 62.
  • An extension 68 of the lever 65 is provided with an elongated slot 99 within which a stud I is adjustably mounted by means of a nut 1
  • the stud I0 carries an anti-friction roller 13 which is received in an elongated slot I4 of an arm I of the driving element 19 of a novel one-' tooth gearing which is similar in its operation to a Geneva gearing.
  • This-driving element 19 is pivotally mounted at 11 on the outside of the casing GI, and is provided with a single tooth 18,
  • Both gear elements 18- and 80 are also provided with locking surfaces 16a, 16b and 80a,
  • interlocking engagement with each other when cavity 19 of the driven element may be considered the tooth "is not cooperating with the cavity I9. 65
  • Fig. 25 shows the cooperating surfaces 16b
  • the driven element 80 is pivotally mounted at 8
  • Slidable longitudinally in guideways 04, provided by the bracket '02, is a rock which is connected with the driven element 80 by a link other locking surfaces 16a and 80a are engaged and the tooth 18 engages the other flank 19a of the recess 19, and vice versa.
  • the pivot supports 66, 11 and BI of the lever 65 and the gear elements 16 and 80, respectively, are preferably in linear alinement with each other as shown by the dot and dash line 91 in Fig. 3.
  • the maximum rocking motion of the driving element 16 is obtaine when the stud I0 is adjusted in the position shown in Fig. 3.
  • the driving element 16 has an angular lost motion relative to the driven element 90.
  • the rack 85 is in constant mesh with gear teeth 90 of a vertical shaft 9
  • is provided at the top with a round head 99,
  • a recessed plate 9'! is secured to the head 92 and serves to retain the base 95 of the stud 99 in the guide groove 94.
  • the head a: with its retainer plate 91 is rotatably housed in a casing 99 which'has a cover 99 suitablysecured-thereto.
  • Carried by the stud base 95 is a pin I00 which projects into an eccentric groove l0! in the recessed bottom I02 of the casing 09 (see particularly Fig-20).
  • the stud 99 can be shifted longitudinally of the guide groove 94 upon rotation of the casing 99 and cover plate 99 relative to the head 93 and retainer'plate 91 due to the cooperation of the pin I00 with the eccentric slot 0l.
  • the eccentricity of the slot IN is such that the stud 96 may be shifted from axial alinement withthe shaft 9
  • the stud base 95 may be locked in adjusted posifirm engagement with thecasing 98, thus locking the stud 98 in any adjusted position to the shaft 9i.
  • the angular distance through which the geneva driven element 80 rocks remains constant irrespective of the variable range of angular travel of the driving element 18. More particularly, the rocking motion of the driven element is of such amplitude that the rack 85 is moved over a distance in which it will rotate the shaft 9
  • Shaft 9I is provided at its lower end with a thread I04 which cooperates with the internal thread of an element I05, having a plurality of concentric slots I06 through which extend holding screws I08, threaded into the bracket 82.
  • the element I05 serves as a nonrotatable nut for the threaded end I04 of the shaft 9
  • the concentric slots I06 of the nut element I05 permit a fine adjustment of the longitudinal disposition of the shaft 9
  • and the elements carried thereby as well as the described drive for said shaft form one part of the lateral feed mechanism, said part being exclusively carried by the stitching head 42.
  • the purpose for imparting to the shaft M a rotary motion as well as e. simultaneous axial motion will be fully explained in the following description of a guide block I09 which forms another part of the lateral feed mechanism, said part being carried by the bed 40, however.
  • the guide block I09 comprises in the present instance an assembly of plate members IIO, IIOa. III, IIIa, IIIb, II2, H26, H21), II2c and H3 (Fig. 17).
  • the plates IIO to H2, inclusive are properly correlated and secured to the mounting plate II3 by suitable dowel pins and screws shown in Fig. 1'1. More particularly the plate members H and IIOa underlie the plate members III, Ia and ID, and the latter underlie the plate members II2, I I2a, H21) and 20.
  • the plate members H20, H21) and H20 alsounderlie plate member II2 which in turn underlies the mounting plate H3.
  • the plate members H0, IIOa, III, Illa, IIlb, II2a, H21) and I I20 are so disposed as to form linear groove II4, the bottom of which is the surface II of plate member II2.
  • the mounting plate H3 is guided for movement parallel to the guideways 60 of the bed 40 (see Fig. 2) in guideways II6, provided by said bed at the bottom side thereof (Fig. 18).
  • the guide block assembly I09 is retained in adjusted position in the guideways IIB by a hand screw II1 which extends through an elongated slot II8 of the bed and through a hole I20 of the earlier mentioned index plate 5I, thus connecting said index plate with the guide block I09 for combined movement.
  • is guided for movement parallel to the guideways II8 by a machined shoulder I2I and surface I22, and is provided with an elongated slot I24, receiving a screw I23 which is threaded into the earlier mentioned cam bar-'50, thereby securing the latter to the index plate In suitably adjusted position relative thereto.
  • the plate member I I I is provided with a groove apart as to form a groove I21 which is also disposed at an inclination to said linear groove II4 (see Figs. 14 and 1'1).
  • the plate members H21) and I I2c are also spaced apart to form a groove I28 which is disposed transversely to the groove I21 and inclined to the linear groove 1 I4, while plate member II2a cooperates with a raised portion M2 to form a groove I25 which is disposed transversely to the groove I28 of plate member III and at an opposite inclination to the linear groove "II4.
  • elements I32 to I35 are cam elements proper and the elements I33 and I34 cooperating with the cam elements I35 and I32, respectively, to define laterally adjustable upper and lower cam grooves H4 and H4" (Figs. 18 and I80) which merge gradually into the linear groove II4 as will be more fully described later.
  • the assembly of individual plate members to form the guide block I09 obviously facilitates the construction of the iatter'inasmuch as the guide grooves I25 to I28, inclusive, and a guide groove I48 to be described later, are formed by simply machining into surfaces of certain plate members or by spacing other plate members, while the contiguous plate members act to retain the elements I82 to I35, inclusive, in their respective gu de grooves.
  • Journalled in the plate members H0, 041 and H3 are two identical pinions I38 and I38, disposed in recesses I40 and HI, respectively, of the guide block I39 and projecting beyond the sides I42 and I43 of said guide block a d stance which is substantially equal to the depth of a tooth.
  • the pinions I38 and I39 are in constant mesh with rack teeth I44, I45, I48 and I41, formed on the edges of the elements I32 to I35, respectively. More particularly, pinion I" is in permanent mesh with the rack teeth I44 and I45 of the elements I32 and I33, respectively, while pinion I39 is in permanent mesh with the rack teeth I48 and I41 of the elements I34 and I35, respectively.
  • the plate member H2 is provided in its top surface with another groove I48 (Figs. 13 and 17) in which is guided a slide I50, having rack teeth I5I and I52 in its opposite edges.
  • the rack teeth I5I are in constant mesh with the pinion I38, while the rack teeth I52 Pie in constant mesh with the pinion I39.
  • This rack I53 Slidable on the machined side face I42 of the guide block I09 is another rack I53 which is in constant mesh with the pinion I38.
  • This rack I53 is provided with a rectangular groove I54 (Figs. 12 and 13), receiving the eccentric I55 of a rotary handle I58 which is journalled on the shank I51 of a screw I58, secured to the guide block I09.
  • the rack I53 is guided for movement at right angles to the axis of the pinion I38 by means of screws I80 which extend through elongated slots I59 in said rack and are secured to the guide block I09.
  • the handle I56 may be rotated, whereby its eccentric I55 forces the rack I53 in either direction, depending on the direction of rotation of the handle I58.
  • Such movement of the rack I53 causes rotation of the pinion I38 and, through Intermediation of rack I50, simultaneous rotation of the adjusted position of said elements.
  • the width of the straight groove I I4 is equal to the diameter of the cylindrical portion of the stud 96, which cylindrical portion projects into said groove at the most to the level of the top surfaces of the lowermost plates III! and Ba, as viewed in Fig. 17, while the flattened top of said stud projects deeper into the groove H4 in order to be acted upon by the laterally adjustable cam grooves I I4 and II4".”
  • stud 96 is located in the front part II 4a of the linear groove I I 4, i. e., to the left of the laterally adjustable guide grooves II 4 and 4" as viewed in Fig. 14. While the stitching head 42 moves rearwardly, a bevelled surface I65 of the stud 96 cooperates with a bevelled surface I61 of the cam element I32 and gradually forces the stud from the dot-and-dash position 960 in Fig. 15 into a position in which the flat I63 of the stud rides on the front face I32a of said cam'element I32 (see full line position of stud 96 in Fig. 15).
  • Thefront face I34a of the cooperating element I34 engages the adjacent flat I62 of the stud 96, I
  • is substantially equal to the thickness of the cam element I32 (Fig. 18), and the direction ofrotation of the shaft N at the point of reversal-R is such that the shaft and stud, due to the cooperation between the shaft thread I64 and the nut I95, are lowered into the position of the stud shown in Fig. I8a in which the latter is in operative alinement with the cooper- The pitch of the thread I04 on the lower.
  • Groove I ll is also provided with a narrow portion I'Il, formed by opposite wall portions I15 which are equally spaced from the median line I6I of said groove Ill and apart from each other a distance substantially equal to the distance between the opposite flats I62 and I63 of the stud 96.
  • the earlier mentioned bevelled surfaces I10 and IlOa of the groove IIl merge into this narrow groove portion, and said bevelled surfaces "0, "(la as well as the narrow groove portion I" extend in the linear groove IIl down to the level of the top faces of the plates Ill, IIila only as viewed in Fig. 12, in order to be out of the path of movement of the cylindrical portion of thestud' 96.
  • the narrow groove portion IIl assumes-guid- 'ju lng control over the stud 96 longitudin'allyof the groove I when the bevelled surfaces I19 and guiding control over the stud during movement 01' the latter in the rearward portion lb of I groove I for a short distance toward and away- 3v from the cooperating elements I32 to I35, inelusive.
  • the narrow groove portion I thus bridges a small gap in the linear groove in which neither the cooperating elements I32 to I35, inclusive, nor said linear groove assumes guiding control over the stud 96.
  • thestud 96 is positively guided throughout the sewing of a button hole of any desired fly-bar width, i. e., from some point in the laterally adjustable guide groove IIl' into and through part of the rear portion IIla of groove IIl in one direction to the poinx of reversal R and again through said rear portion lb of groove I in the opposite direction to some point in the other laterally adjustable guide groove IIl'f. While there is a short dis"- tance between the earlier mentioned undercut shoulder I'I3 (Fig.
  • is rotated through one complete revolution adjacent the fixed'point of reversal R (Fig. 10a) of the stitching head by earlier described mechanism, comprising main cam l5, lever 65, the one-tooth gearing I6 and 8D, link 66 and rack 85. More particularly, and for reasons which will appear later, the rotation of the shaft II preferably takes place at substantially uniform angular speed, and said shaft completes onehalf of its revolution at the time the stitching head reverses its direction of movement.
  • the shaft 9i starts and ceases to rotate at points coincident in the rearward and return travel of the stitching head, and said shaft has concluded one-half of its revolution when the stitching head reverses its direction of travel at the eye end of the button hole. If the stud 96 is adjusted in coaxial alinement with the shaft 9 I, the former will merely rotate about its own axis and have no bodily movement, with the result that no lateral displacement of the stitching head takes place at the eye end, and no eye is formed.
  • the stud 96 is adjusted in any other position relative to the shaft 9I, the stud will have an eccentric motion and, by cooperation with the relatively stationary rear portion IIlb' of groove Ill, impart a rocking motion to the longitudinally travelling stitching head.
  • the longitudinal and lateral component motions of the stitching head result in a motion of the needle 43 and cooperating loopers of the stitch forming device which is circumscriptive of an eye.
  • an eye is formed which is symmetrical to the longitudinal axis of the button hole.
  • the guide groove 94 of the shaft 9I must be initially positioned so as to extend parallel to the linear groove II4 when said shaft is in its normal position of rest, as otherwise any adjustment of the stud 96 relative to the shaft 9
  • the present machine has also provisions for turning the stitch forming device during the sewing around the eye end of a button hole in order to obtain the radiating or outwardly diverging stitches 1 (Figs. 4, 5, 8 and 9), as well as to condition the stitch forming device for the sewing of the stitches d, a, c and 1) during the return movement of the stitching head 42 from the fixed point R to the fixed point S (Fig. 10a).
  • the main cam 45 has in its lower face another cam groove I80 in which rides an anti-friction roller vided with an elongated slot I84.
  • the roller m of lever I82 projects through an elongated slot I85 of the cam casing 6
  • a stud I88 carrying an anti-friction roller (not shown) which rides in an elongated slot I81 (Fig. 24) of the driving element I88 of a single tooth Geneva gearing, the driven element I89 of which is mounted in any suitable manner on an upright shaft I90.
  • the driving element I88 is pivotally mounted at I9I on the cam casing 6
  • the operation of the present The invariable angular motion, imparted to the driven element I89 by the driving element I88 irrespective of the adjustment of the connecting stud I 86 between element I88 and lever I82, causes revolution of the turrets.
  • the coordination between the cam grooves N0 and 41 and between the elements I 82, I88 and l89 is such that the turrets will start and end their semirevolution at points coincident in the rearward 5 and return travel of the stitching head 42, and complete one-half of their semi-revolution when the stitching head reverses its direction of movement.
  • the tooth I92 of the driving element I88 must have moved the driven l0 element I89 through one-half of its fixed range of movement when the follower I8I of lever I82 is exactly half-way of its throw by the active portion I80a of the cam groove I80.
  • the 40 semi-revolution of the turrets can be made to coincide with one-half of the complete revolution of the stud 96, and more particularly with the second and third quarter-revolution of said stud 96.
  • the stitches will radiate or 5 diverge outwardly around the end portion of an eye to one side of the greatest width thereof (Figs. 4, 5, 8 and 9).
  • the stitch forming device in the present machine produces a uniform number of stitches per time unit which is preferably such that the radiating stitches do not crowd each other at the eyeless end of a buttonhole, 1.
  • the uniformly reciprocating needle 43 and cooperating loopers move around, or circumscribe, a buttonhole of any shape at a speed which is practically uniform, inasmuch as the transverse movement of the needle and cooperating loopers, superimposed upon their invariable longitudinal movement during the formation of an eye of any shape and size, does not appreciably vary their motion around the eye from their motion along the parallel sides of the buttonhole.
  • a stitch is formed at recurrent intervals of the substantially uniform movement of the needle 43 and cooperating loopers'around a buttonhole of any shape.
  • All stitches of a buttonhole of any shape are, consequently, substantially uniformly spaced and cannot crowd each other, except at the far end of an eye where the parallel stitches, though uniformly spaced at the edge of the eye, would nevertheless crowd each other were it not for the rotation of the turrets which causes angular displacement of the stitches at said far end of the eye so that they diverge around said eye end in radial fashion.
  • the turrets are naturally rotated at their greatest speed in order to radiate the stitches around the end of the buttonhole during the shortest possible longitudinal movement of the needle 43 and cooperating loopers, while the'speed of rotation of the turrets for sewing around an eye of a given size is varied with a view toward obtaining diverging stitches around said eye which approximate radial disposition thereon as nearly as possible.
  • the follower 63 rides in the other active portion 62b of the cam groove 62, causing an idle revolution of the stud 96, and the follower I8I rides in the other active portion I80! of the cam groove I80, causing the turrets 53, 54 to rotate idly through one-half revolution and position the stitch forming device for the sewing of the next button hole, whereupon the machine is stopped automatically by the main stop mechanism (not shown).
  • Figs. 10 and 10a illustrate, by way of example, the extent to which the guide block I09 and the cooperating stud 98 can be adjusted to obtain certain maximum and minimum dimensions of a buttonhole.
  • the invariable amplitude of the longitudinal reciprocation of the stitching head and, consequently, of the stud 96 is represented by the distance A between the points S and R.
  • the guide block I09 and cam bar 50 are shifted to the left as viewed in Figs. 2 and 11, whereby the point of reversal of the reciprocation of the stud 96 is moved farther away from the starting point of the stitching operation somewhere between the cam elements I32, I35 in the guide block I09.
  • the pointer 200 of the index plate being movable with said guide block, cooperates with a graduated scale 20I on the bed 40 and gives the operator an indication of the necessary amount of adjustment of said guide block for a bottonhole of a given over-all length, Adjustment of the cam bar 50 with respect to the index plate 5
  • the cam bar 50 is shifted to the right as viewed in Figs. 2 and 11 relative to the index plate SI and guide block I09, thereby starting the operation of the stitch forming device somewhat later during the travel of the stud 95 in the laterally offset guide groove IN on initial or rearward movement of the stitching head.
  • the cooperating elements I32, I34 and I33, I35 are shifted inthe earlier explained manner relative to the linear groove II4. Consequently, there will be less offsetting of the stitches b and b at the fly-bar end, and the stitches b and b will be more or less spread out laterally and appear overlapping instead of completely superimposed as in Figs. 4 and 8. While the adjustability of the cooperating elements I32, I35 and I33, I34 may thus be employed to vary the width of the fly bar, its chief importance is in permitting the exact superposition of the fly bar stitches b, b, as is usually desirable, irrespective of their width.
  • the cooperating elements I32, I34 and I33, I35 are so adjusted as to form one groove which is in alinement with the narrow portion I14 of the linear groove II4. Consequently, there will be no lateral offsetting of the stitches when the stitching operation commences while the stud 96 travels somewhere between the opposite faces of said cooperating elements I32 to I 35, inclusive.
  • the same result can also be accomplished by adjusting the cam bar 50 so far away from the guide block I09 that the stitching operation will not be started until the stud 96 moves in the rearward portion II4b cf the linear groove II4.
  • the over-all aieaim length of a bar-less buttonhole is necessarily smaller by the last mentioned kind of adjustment than by the first mentioned kind, and the choice of the kind of adjustment depends on the desired over-all length of the button hole, as can be readily understood.
  • the stud I is shifted in the slot 69 of lever 65 to the right as viewed in Fig. 3, thereby causing the eccentric motion of the stud 96 to take place at lower speed and, consequently, during a longer period of the longitudinal motion of the stitching head.
  • the result is that the offsetting oi the stitches d and d will start and end, respectively, at coincident points in the rearward and return movement of the stitcl nng head 42 which are farther away from the point of reversal of said stitching head.
  • Corresponding adjustment of the stud I86 in theslot I84 of lever I82 will cause the stitches f to diverge around an end portion of the longer eye to one side of the greatest width thereof in the manner shown in Fig. 8.
  • the stud 95 is adjusted coaxially oi the shaft 9
  • the disclosed machine embodying the present invention in a preferred form, is a self-contained structure of rugged and durable construction and does not require interchanging of any parts thereof in order to accomplish the manifold results explained in the preceding description.
  • the commercial value of the present machine is further enhanced in that its adaptation to the sewing of a buttonhole of practically any desired shape and size requires only a minimum number of simple adjustments.
  • mere rotation of the casing 98 results in a difierent width of an eye or no eye
  • mere adjustment of the stud ID on lever 65 (Fig. 3) results in a different length of an eye.
  • Mere adjustment of the stud I86 on lever I82 causes the stitches to diverge around an end portion of an eye of any length to one side of the greatest width thereof.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitdl'h forming device; and mechanism for causing relative movement between said devices around a buttonhole, said mechanism including adjustable means for rotating the stitch-forming device during relative movement around an end portion of the buttonhole between any two points thereof of predetermined coordination and within a certain range longitudinally of the longitudinal axis of the buttonhole.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said device's around a buttonhole having one and variable between eyeless and an eye of variable length, said mechanism including adjustable means for rotating the stitch-forming device during relative movement around said one end between any two. points thereof of predetermined coordination and with in a certain range longitudinally of the longitudinal axis of the buttonhole.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, said mechanism including adjustable means for rotating the stitch-forming device through an invariable angulardistance during relative movement around an end portionof the buttonhole between any two points thereof of predetermined coordination and within a certain range longitudinally of the longitudinal axisoi the buttonhole.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing rela" tive movement between said devices around a buttonhole having one end variable between eyeless and an eye of variable length, said mechanism including adjustable means for rotating the stitch forming device through an invariable angular distance during relative movement around said one end between any two points thereof of predetermined coordination and within a certain range longitudinally of the longitudinal axis or the buttonhole.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable shape; and adjustable mechanism for rotating the stitch forming device at said eye at such speed that the di verging and parallel stitches of the buttonhole are substantially equally spaced regardless of the shape of the eye.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchiormlng device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable size; and adjust-- able mechanism for rotating the stitch forming device at said eye at such speed that the diverging and parallel stitches of the buttonhole are substantially equally spaced regardless of the size of the eye.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; mechanism for causing relative movement between said devices around a butvice at said eye end at such speed that the di-- tonhole having an eye end of a width variable between zero and a certain maximum width; and adjustable mechanism for rotating the stitch forming device at said eye end at such speed that the diverging and parallel stitches of the buttonhole are substantially equally spaced regardless of the width of said eye end.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; mechanism for causing relative movement between said devices around a buttonhole having an eye end of a length variable between zero and a certain maximum length; and adjustable mechanism for rotating the stitchforming device at said eye end at such speed that the diverging andparallel stitches of the buttonhole are substantially equally spaced regardless of the length of said eye end.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchiorming device; mechanism for causing relative movement between said devices around a buttonhole having an eye end of a length and width variable between zero and a certain maximum length and width, respectively; and adjustable mechanism for rotating the stitch forming delength and width of said eye end.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforrning device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable length; and adjustable mechanism for rotating the stitch forming device at said eye at variable speed so that the number of diverging stitches varies substantially proportionally with the length of the eye.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a'stitchforming device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable width; and adjustable mechanism for rotating the stitch forming device at said eye at variable speed so that the number of diverging stitches varies substantially proportionally with the width of the eye.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable length, the time period of the relative movement around the eye varying proportionally with the length thereof; and adjustable mechanism for rotating the stitch forming device at said eye during a time period varying proportionally with the length of the eye.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable width, the time forming device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable length and width, the time period of the relative movement around the eye varying proportionally with its length only; and adjustable mechanism for rotating the stitch-forming device at said eye during a time period varying substantially proportionally with the length and width of the eye.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable length, the time period of the relative movement around the eye varyingproportionally with the length thereof; and adjustable mechanism for rotating the stitch forming device at said eye at a speed varying substantially inversely proportionally with the length of the eye.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; mechanism for causing relative movement between said devices around a button hole having an eye of variable width, the time period of the relative movement around an eye of any width being invariable; and adjustable mechanism for rotating the stitch forming device at said eye at a speed varying substantially inversely proportionally with the width of the eye.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; mechanism for causing relative movement between said devices around a buttonhole having an eye of variable length and width, the time period of the relative movement around an eye of any length and width varying substantially proportionally with its length only; and adjustable mechanism for rotating the stitchforming device at said eye at a speed varying substantially inversely proportionally with the length and width of the eye.
  • a buttonhole sewing machine comprising,
  • a work-holding device in combination, a work-holding device;' a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, said mechanism including eccentrically driven means of adjustable eccentric stroke for causing a component relative movement of variable amplitude between said devices transversely of the buttonhole, thereby obtaining an eye of variable width.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, said mechanism including eccentrically driven means of an eccentric stroke vari-- able between zero and a certain maximum stroke for causing a component relative movement of variable amplitude between said devices transversely of the buttonhole, thereby obtaining a buttonhole having no eye or an eye 01' variable width.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, one oi. said devices having a groove forming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices having a groove longitudinally of the buttonhole and said mechanism including a stud of an eccentric stroke adjustable between zero and a certain maximum stroke, said stud projecting into said groove and being immovable relative to the other device laterally of the buttonhole and rotatable for the formation of no eye or an eye of variable width.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said dvices around a buttonhole, said mechanism including eccentrically driven means and an adjustable driver therefor for causing a component relative movement between said devices transversely of the buttonhole during a variable period of the relative movement longitudinally of the buttonhole thereby obtaining an eye of variable length.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitch- 'forming device; and mechanism for causing rela tive movement between said devices around a buttonhole, said mechanism including eccen trically driven means of an adjustable eccentric stroke and an adjustable driver therefor for causing a component relative movement of variable amplitude between said devices transversely of the buttonhole during a'variable period of the relative movement longitudinally of the buttonhole, thereby obtaining an eye of variable width and length.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, said mechanism including eccentrica'lly driven means having an eccentric stroke variable between zero and a certain maximum stroke, and an adjustable driver therefor for causing a component relative movement of variable amplitude between said devices transversely of the buttonhole during a variable period of the relative movement longitudinally of the buttonhole, thereby obtaining no eye or an eye of variable width and length.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, said mechanism including two single members cooperating to cause component relative movements between said devices transversely to the buttonhole for the formation of an eye and a fly bar, and said members being alternately driving and driven members during the formation of said eye and fly bar, respectively.
  • a buttonhole sewing machine comprising, in combination a work-holding device;'a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing longitudinally aligned grooves, one extending longitudinally of the buttonhole and the other having a laterally offset portion and said mechanism including a cam immovable relative to the other device laterally of the buttonhole and rotatable in said one groove for the formation of an eye .and relatively movable in said other groove for the formation of a flybar.
  • a buttonhole sewing machine comprising, in combination, a work-hoidingdevice; a stitchformingdevice; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing agroove having a linear portion longitudinally of the buttonhole merging into a laterally offset portion, and said mechanism including a cam carried by the other device and projecting into said groove,
  • said cam being rotatable in said linear portion for ally offset portion thereof, and said mechanism including a cam carried by the other device, said cam being rotatable in and relatively movable through a length of said linear portion for the formation of an eye, and relatively movable through said oifset portion and the remaining length of said linear portion for forming a flybar, respectively for guiding said devices during the formation of the buttonhole length between the eye and fly bar.
  • A-buttonhole sewing machine comprising, in combination, a work-holding device; a stitch forming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion longitudinally of the buttonhole merging into a laterally adjustable portion, and said mechanism including a cam immovable relative to the other device laterally of the buttonhole and projecting into said groove, said cam being rotatable in said linear portion for the formation of an eye and relatively movable in said adjustable portion for the formation of a iiy bar of variable width.
  • a buttonhole sewing machine comprising,
  • a work-holding device a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion longitudinally of the buttonhole merging into a laterally oifset portion, and said mechanism including a stud of variable eccentricity immovable relative to the other device laterally of the buttonhole and projecting into said groove, said stud being rotatable in said linear portion for the formation of an eye of variable width, and relatively movable in said ofiset portion for the formation of a fly bar.
  • a buttonhole sewing machine comprising, in combination, a worlrholding device; a stitchiorming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion longitudinally of the buttonhole merging into a laterally adjustable portion, and said mechanism including astud of variable eccentricity immovable relative to the other device laterally of the buttonhole and projecting into said groove, said stud being rotatable in said linear portion for the formation or" an eye of variable width, and relatively movable in said adjustable portion for the formation of a fly bar of variable width.
  • a buttonhole sewing machine comprising, in combination, a worlr-holding device; a stitchforming device; and mechanism for causing rela tive movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion iongitudinally oi the buttonhole merging into a portion laterally adjustable between alinement with said linear portion and a certain maidmum displacement therefrom, and said mechanism including a cam immovable relative to the other device laterally of the buttonhole and projecting into said groove, said cam being rotatable in said linear portion for the for mation of an eye, and relatively movable in said adjustable portion for the formation of no fly bar or a fly bar of variable width.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion longitudinally of the'buttonhole merging into a laterally ofiset portion, and said mechanism including a rotatable stud adjustable between coaxial alinement with its axis of rotation and a certain maximum eccentric stroke and immovable relative to the other device laterally of the buttonhole, said stud being rotatable in said linear portion for the formation tively movable in said offset portion for the formation of a fly bar.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion longitudinally of the buttonhole merging into a portion laterally adjustable between alinement with said linear portion and a certain maximum displacement therefrom, and said mechanism including a rotatable stud adjustable between coaxial alinement with its axis of rotation and a certain maximum eccentric stroke and immovable relative to the other device laterally of the buttonhole, said stud being rotatable in said linear portion for the formation of no eye or an eye of variable width, and relatively movable in said adjustable portion for the arcane formation of no width.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion longitudinally of the buttonhole merging into a laterally offset portion, and said mechanism including a cam immovable relative to the other device laterally-oi the buttonhole and projecting into said groove, and adjustable driving means for rotating the cam in said linear portion during a variable period of the relative movement longitudinally of the buttonhole for forming an eye of variable length, said cam being also relatively movable in said offset portion for the formation of a fly bar.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a. stitchforming device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion longitudinally of the buttonhole merging into a laterally offset portion, and said mechanism including a stud of variable eccentricity immovable relative to the other device laterally of the buttonhole and projecting into said groove, and adjustable driving means for rotating said stud in said linear portion during a variable period of the relative movement longitudinally of the buttonhole for forming an eye of variable width and length, said stud being also relatively movable in said ofl'set portion for the formation of a fly bar.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforrning device; and mechanism for causing relative movement between said devices around a buttonhole, one of said devices providing a groove having a linear portion longitudinally of the buttonhole merging into a laterally adjustable portion, and said mechanism including a stud of variable eccentricity immovable relative to the other device laterally of the buttonhole and projecting into said groove, and adjustable driving fiy bar or a fly bar of variable means for rotating said stud in said linear portion during a variable period of the relative movement longitudinally of the buttonhole for forming an eye of variable width and length, said stud being also relatively movable in said oflset portion for the formation of a fly bar of variable width.
  • a buttonhole sewing machine comprising, in combination, a work-holding device; a stitchforming device;'a pivot connecting said devices, said pivot being floatable longitudinally of a buttonhole relative to at least one device; mechanism for causing relative reciprocation of invariable amplitude between said devices longitudinally of the buttonhole; other mechanism for causing relative rocking motions between said devices, said other mechanism including an element carried by one device adjustable in a direction longitudinally of the buttonhole and providing a groove extending in the same direction, and an eccentric carried by the other device and projecting into said groove to guide the devices during said relative reciprocation, and being rotatable in said groove for the formation of an eye; and an adjustable mechanism for starting and stopping the operation of the stitch-forming device at any location of the eccentric Within a certain range in the groove, thus obtaining a buttonhole of variable overall length and having an eye.
  • a buttonhole sewing machine comprising,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
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US156136A 1937-07-28 1937-07-28 Buttonhole sewing machine Expired - Lifetime US2149110A (en)

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US156136A US2149110A (en) 1937-07-28 1937-07-28 Buttonhole sewing machine
GB31640/37A GB511493A (en) 1937-07-28 1937-11-17 Improvements in or relating to buttonhole sewing machines
DEI59649D DE680523C (de) 1937-07-28 1937-11-19 Knopflochnaehmaschine
FR829942D FR829942A (fr) 1937-07-28 1937-11-26 Machine à coudre les boutonnières

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US156136A US2149110A (en) 1937-07-28 1937-07-28 Buttonhole sewing machine
GB31640/37A GB511493A (en) 1937-07-28 1937-11-17 Improvements in or relating to buttonhole sewing machines

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181084A (en) * 1977-12-30 1980-01-01 Elitex, Koncern Textilniho Strojirenstvi Buttonhole bar tacker sewing machine with a device for controlling the buttonhole length terminated by a wedge bar tack
US4183309A (en) * 1977-12-30 1980-01-15 Elitex, Koncern Textilniho Strojirenstvi Buttonhole sewing machine for sewing eye or straight buttonholes with or without a wedge bar tack
US4727817A (en) * 1984-09-14 1988-03-01 Suzuki Manufacturing, Ltd. Buttonhole sewing machine
US4903619A (en) * 1984-09-14 1990-02-27 Suzuki Manufacturing, Ltd. Buttonhole sewing machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20080011A1 (it) * 2008-01-11 2009-07-12 Mara Srl Macchina per cucire con nuovo dispositivo di affrancatura
CN112900806A (zh) * 2020-03-10 2021-06-04 邓昌杰 一种砂浆喷涂装置的应用

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181084A (en) * 1977-12-30 1980-01-01 Elitex, Koncern Textilniho Strojirenstvi Buttonhole bar tacker sewing machine with a device for controlling the buttonhole length terminated by a wedge bar tack
US4183309A (en) * 1977-12-30 1980-01-15 Elitex, Koncern Textilniho Strojirenstvi Buttonhole sewing machine for sewing eye or straight buttonholes with or without a wedge bar tack
US4727817A (en) * 1984-09-14 1988-03-01 Suzuki Manufacturing, Ltd. Buttonhole sewing machine
US4903619A (en) * 1984-09-14 1990-02-27 Suzuki Manufacturing, Ltd. Buttonhole sewing machine
US5067422A (en) * 1984-09-14 1991-11-26 Suzuki Manufacturing Co., Ltd. Buttonhole sewing machine

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FR829942A (fr) 1938-07-11
GB511493A (en) 1939-08-21

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