US1352333A - Stop-motion - Google Patents

Description

4 SHEETS-SHEET 2.

Patented Sept. 7, 1920.

IIIIII l. P. WEIS.

STOP MOTION.

APPLICATION FILED APII.29, IsIe. IIENEI-/En nc.24,1919. 1,352,333.

vllt lillllllnrArlrAVr J. P. WEIS.

STOP MOTION.

\ APPLICATION HLED APR.29,1916. nENEwED 0m24.191s. 1,352,333,

Patented Sept. 7, 1920.

4 SHEETS-SHEET 3 I. P, WEIS.

sToP MoloN. APPLICATION FILED APR-29,1915- RENEWED DEC. 24,19l9.

Patented Sept. 7, 1920.

4 SHEETS-SHEET 4.

serrer orties.

JOHN PETER wEis, or NYJ-ion, NEW Yoan, AssIGNoE. or ONE-HALE, BY MEsNE ASSIGNMENTS, To METROPOLITAN sEwrNe MACHINE CORPORATION, or NYACK, NEW YORK, A coEPoEATIoNoE DELAWARE.

STOP-MOTION.

Specification of Letters lfatent. Pagued Sept, 77 jjafl Original application filed October 16, 1914, Serial No. 867,005.. Divided and this appiicationiledy `.april 29, 1916, Serial No. 94,355.

To all whom t may concern.'

Be it known that l, JOHN PETER l/VEIS, a citizen of the United States, residing at Nyack, in the county of Rockland and State of New York, have invented certain new and useful impr vements inStop-ilfotions, of which the following is a specification.

This invention isan improvement in stop motions for sewingand other machines and involves constructional arrangements whereby thorough and constant lubrication is obtained for the stop-motion parts. rihe sewing machine and stop motion illustrated are high-speed mechanisms in which serious heating would occur were the necessary parts not thoroughly and constantlyelubricated whiler the mechanisms are in action. iiy present invention in stop motions is widely applicable to machine drive-shafts other than those of sewing machines.

This application is a division my application Serial No. 867,005 for sewing machine and cutting mechanism therefor', filed October 16, and which describes features of improvement on the combined cutting-and-sewing` machine shown "in my United States iatent llo. 1,114,082 of October 20, 1914. The iubricating system herein described forms the subject-matter of my application `'ierial No. 911:,35li, Iiled April 29, 1916. f

In they accompanying drawings forming part hereof,

Figure l is a top plan view of a portion of the combined cntting-and-sewing machine mentioned. This view shows two sewing machine heads and for each head one mem ber of a stop-motion. rlie view is parA ticularly useful in locating parts illustrated in other figures.

Fig. 2 is a lcngthwie sectional View of one of the sewing machine heads at line 9.-.2 of Fig. l. rlhis view shows an oil reservoir and pump carried by one of the sewing machine heads, the construction and arrangement of the top drive-shaft and of the looper shaft and of various connections between the two, together with the means for driving theoil pump and a portion of the stop motion, in'lengthwise central sec- Renewed December 24, 1919.

Serial No. 347,191.

tion, for the top drive-shaftof a sewing machine.

Fig. 3 is a view partly in side/eleva# tion and partly in vertical section at line 8 8 of Fig. 1, and shows the top drive shaft of a sewing machine head with a stop motion therefor and a stop motion control lever provided with means for holding av Fig. 6 is an elevational view partly in A full lines andV partly in lengthwise central ection, of a thimble-forming part of the construction of the rearward oil-receiving and oil-holding end of the stop motion control lever. y

Figs. 7 and 8 are respectively side and end elevations ofa perforated sleeve for receiving the thimble shown in Fig. 6, the

sleeve being adapted for a threaded con nection with a chamber in the rearward end of the aforesaid lever. l

Fig. 9 is a view partially in elevation Vand partly in vertical central section, at a line correspondingv to line i4- 1st of Fig. l0, and shows a rearward portion of the top shaft of' a sewing machine head provided with a pulley for driving such shaft and for clutching the stop `motion thereof. The view also shows certain details of the stop motion, including a recess for a brake shoe omitted from the view. Y

Fig. l0 is a view partially in elevation and partly in transverse section atv line 15-15 of Fig. 9, and shows the driving and clutch pulley together with details f the stop motion. rlhis view shows the stopmotion balls in a clutched position by engagement with a ball-retaining ring clamped in the belt wheel. Y

Fig. ll is aview similar to Fig. l0 but shows stop-motion wedges and balls in nonclutching position. i

Fig. l2 is an end elevation ofthe rearward end portion of the top Vdrive shaft and illus- Vicov trates in end view a lengthwise-extending key on the rearward end of the drive shaft. Fig. 13 is a side elevation of the rearward end portion of said drive shaft, and shows' the lengthwise-extending key together with wedge-receiving pockets ina portion of the drive-shaft.

Fig. 111 is a tubular sleeve of varying diameters, a portion of which forms a ball retainer, and another portion of which forms a stop tooth. r1`his sleeve is a member of the stop motion and has portions acted on by a brake shoe.

Fig. 15 is a transverse sectional view of vsaid sleeve at line 20-20 of F ig. 111;

Fig. 16 is an end elevation of the rearward end of the top drive-shaft and of the driving and clutch pulley in assemblage with the parts shown in Figs. l13, 14, 15, and other figures. i y

y Fig. 17 is a perspective view of" one of the ball-receiving wedges forming part of the stop motion.V Y

Fig. 18 shows in two views a brake shoe forming .a part of the stop motion.

Fig.'19 is a view partly in elevation and partly in transverse central section at line" 24-24 of Fig. 9, and illustrates the construction of the rear end hearing for the stop sleeve shown in Fig. 9 for the rearward end' `portion of the top-shaft.r The brake shoe conduits in these parts.

' Referring to the drawings, the two sewing machine heads together with their respective stop-motions are identical. Description of will therefore be sur'licient. rEhe sewing inaone sewing machine and of one stop-motion chine head comprisesf an upper horn A, an under horn A', anda connecting trunk a, the horns and trunk having communicating chambers. The outerv wall of the trunk comprises an inwardlyprojecting boss a in the inward end of which stop-motion members are arranged in operative relation to the rear rend of the top or needle-bar drive-shaft. The upper sine of the upper horn A is provided with a covered opening at a2 for access to the chamber of the trunk, and the outer end wall is providedwith an opening c3 thro-ugh which the lubricant is pouredv into an oil container carried by a lower part of the trunk. The rear wall of the trunk is also provided with a covered opening a4 into a Vlengthwise-extending chamber of the boss 0,

for observation of the lubricant through the transparent cover i5 in the chambery of the length in tubes hereinafter described, which are centered and held in the lengthwise-ex-A tending chambers of the horns by set-screws c through the horns and impinging on the outer surfaces of the tubes.

Sewing-machine st0p-m0t'0a.-The shaft extension 25a has its ball cranks 35spaced apart one from the other, and rearwardly of these cranks it has an enlarged yportion 91 formed circumferentially with three wedgereceiving pockets 92 at 1200 apart, to receive the segmental wedges 93, the curved wall of each of which from its butt to its pointed end, is grooved at 94 in the direction of the curvature of the wedge to receive balls. rlhe cross-section of the pockets is shown in Figs. 10 and 11, which also show the cross-section of the wedge shown in perspective-in Fig. 12. The curved grooves 94 are eccentric to the axis of the top shaft, and the outward edges ofthe side walls 95 of each groove are concentric with the top shaft axis and flush with the periphery of theV enlargement 91. A stop sleeve 96 (Figs. 9, 10, and 141) has two interior and two corresponding exterior diameters. Portion 97 of the sleeve fits freely on the top-shaft enlargement 91 and holds the wedges 93 in the pocketsA 92. Portion 97 of sleeve 96'is provided with three openings 98 through itsA annular wall, spaced apart 120o to receive the balls 99, each of Vwhich lies proj ectingly in an opening 98, and also lies in a groove 94 of a wedge 93. .A ball retaining ring 99a forms part of the belt-wheel 100 which is made inY Ytwo parts secured laterally together, by

screws 101, the ball retaining ring being secured ixedly between them. The belt-wheel has a hub 102 projecting from each of its sides, the hub fitting loosely and running on the sleeve 96 which isexteriorly reduced in diameter at 103, 103, and exteriorly provided with an interposed stop tooth 10L1 between the reduced portions103, 103 which tending key-slot 106 to receive a radially projecting key 107 formed on the outer' end 103 of the top shaft extension 25L adjacent the enlargement 91 (Figs. 12, 13 and 15).

' rThe interior wall of the reduced portion of the sleeve 96 is indicated by 109'. The Vsleeve 96 is provided at the end of its reduced portion with a pin 110 extending in the direction of the length of the sleeve. One end of a coil spring 111 which is the stop-motion starting spring, is secured to this pin, and the other end of the spring is connected by a pin 112 to the keyed portion 107 of the top shaft. An end bearing 113 for the sleeve 96 is cut out at 114 to receive a brake shoe, and also at 115, and is formed with a bore 116 (F ig. 19) wherein portionsof the reduced portions 103 with other portions of the sleeve freely rotate in exposure to the brake shoe. A brake-shoe 117 (Figs. 2, 3 and 18) is mounted in the cut-out 114. The shoe has a lining 118 of Babbitt or other metal or material, and on its upper or back side has a slot 119 which receives the end 120 of a pressure-pluglifting lever 121 (Figs. 3 and Y 21) which at 122 is pivoted in a housing for the stop-motion with one'end projecting for actuation. Such housing is the front end portion of the chambered boss a. rlhe topv of the brake shoe is concaved at 124 at right-V angles to the slot 119 to receive the convex head 125 o f the pressure-plug 126, the head being slotted at 127 to receive the end 120 ofthe lever 121. A coil spring 128 (Fig. 3) surrounds the upwardly-extending stem of the pressure-plug 126 and a hollow screw 129 surrounding the stem of the pressure plug is mounted in the housing mentioned to regulate the pressure of the springine under end of which bears. on the flange 123 of the pressure plug head. The housing is centrally chambered at 130 to receive the bearing 113 for the assembled sleeve -96 and shaftend 108 (Figs. 2, 3 and 9); The housing on its side opposite the pressure plug or on its underside in the form shown, nas a radial slot 131 which communicates with the cut-out 115 formed in the bearing 113. rl`he housing, adjacent the pressure plug, is slotted at 132 to receive the p'ressurefplug lifting lever 121 which at 122 is pivoted between side walls ofthe slot. The oil chamber 2T-is at the outward end of the chambered boss or housing a" and is supplied with lubricant from the oil tube 11, the upper end of which overhangs and discharges into the oil-feed opening 12 formed-vertically in the upper wall of the housing. Stop-motion control-Ehe sewing-machine trunlr is provided with a bulging projection 134 at its upper front side. The front wall of the bulging projection is vertically slotted at 135 toV receive the Yhub 136 of the stop-motion control lever 137 which is formed forwardly of its hub with a transverse opening 138 into which projects the end of an adjusting screw 139 to engage the end 140 of a trip lever 141, the end 140 projecting laterally into the hole 133 in opposition to the end of the adjusting screw 139. The stop-motion control lever 137 is fixed on a transverse rocker shaft 142 by set screw 143. V The ends of the jects intothe chamber of thetrunlr and its upper side is recessed at 145 to hold a wire basket or the like 146 filled withr filtering material 14'?, the baslret or containerbeing held in place byk a staple 148. The recess 145 and ltering material hold lubricant supplied by the oil pump referred to, the

lubricant flowing into recess 145 fromthe conduit 90.l An oil canal 149 extends forwardly from the bottom ofthe lubricant recess '145 through the end wall 'cof a bore 150 inthe rear end of the Vcontrolling-lever arm `144. The outer portion of this' bore is tapped to receive a hollow annular bush-` 151 having in its forward end a plug 152 secured to the bushing by a transverse pin 153.. The" plug has an integralrearwardly-extending stem 154. The outer or rearwardly-extending end of the bushing is threaded so as to be screwed into thetapped end of the bore 150, Yand forwardly of its threaded portion the bushing has a reduced exterior diameter through the side walls of which, just inwardly of the inner wall. of the vplug 152, oil holes 155 are formed. rllhe annular wall of the bushing also `hasfa series ofannularly arranged oil holes 156 adjacent the inward end of its threaded portion. 151 sliding thimble 157, the rearward closed end of which is rounded off at 158, is mounted in the bore of the bushing 151, the tubular wall 159 of the thimble' sliding freely in the bushing, and the thimf ble serving as a valve to cover and to uncover the seriesofjoil holes 156, but not to cover or uncover the oil holes 155. which l are diametrically alined one with the other. A. coilvspring 160 surrounds thelplug stem 154, abuts against the rearward wall of the plug, and also abuts at its other end'against the end wall of the thimble, andthis spring has a strength just sufficient to pushthe sliding thimble outwardly to uncover the oil holes156 when exterior pressure on the thimble end is relieved. The outwardlyrounded head 153 of the thiiiible is'always pressed outwardly by the spring 160 against the opposed end 161 of a stop finger 162 which `by pin 163 is pivotedto a bracket 163' carried by the rear end of the arm144 of the stop lever 137. The lower end'of the stop finger'v is provided with a trans,- verse pin 164 projecting on both sides, and each projecting'end of the pin vhas con-v nected to it a coilspring 165. `Thenpper Y end of each springV is attached lto the projectingneck ends 166 of the pin 163. The` springs thus mounted are under tension and holdV the stop ringer 162 with the pivot pin 163x abutting against the under wall of a slot 167 formed through and elongatedin the direction er the Vlength or" the stop linger, rby the spring1 165 and slot 167 con-l struction. vThe stop iingerr162 permits the stop lever 137 and its arm 1&4 to assume the position shown in Fig. 3 even if the tooth 104- is not in exact position for reception voit the stop linger 162 sov that it will Aenter the eccentric cut 105 to engage the tooth e; on its next rotation. rIlhe bracket 168 carried by the stop lever arm 14161 Vis slotted 169 to receive the stop linger, the head 170 oic which coacts with the stop tooth 1011. vrllhe upper side of the bracket V168 projects upwardly into a slot 171 of the housing or boss a, and the head ot the stop linger reaches' the stop tooth 104 of the stop sleeve 96 through the communicat- V ingslots 171,V 131 and 115.

the inner surface of the sleeve 96.

, motion control lever 137 has motion mechanism.

rllhe body ott oil or other lubricant containedV withinfthe tliiinble 157 and the bushing 151 and the plug 152, is aV vitally important feature ot and factorin the stop- This body' of oil Awhich l showv by dots -marlred C, constitutes a shock-absorbing cushion, which' cushion is characterized by the power to absorbV shock without lany resultant rebound. Oil in chamber 27 of theboss reaches opposing surfaces ot the stop motion vthrough the space l(F ig. 2) betweenY the outer surface the outer end/ofthe top shaft extension 2.5"L and This space as an oil-receiving conduit seen in Figs. 2 and 16'where it is indicated. by 172. rlhence theJ oil linds its way between opposing surfaces of parts and works in between the outersurface of the enlarged portion 91 of the top'shaft extension 25"L and the inner surface of vthe enlarged portion 97 of sleeve 1 96, reaching the balls 99 and the wedges 941 and the walls o1 the wedge-receiving pockets 92.V Y

. The mode of operation of the stop motion is .as followspAs shown in Fig. 3 the stop 'linger 162 is up 'against the stud 163 with Vits upper end in engagement with the stop tooth 104;. The brake shoe 117 is in its lowermost position.v YThe top shaft is rotatable in counter-clockwise direction as indicated by.

V`the arrow in Fig. 3, and the shaft is in-its assuming that the stopits outward or forward' end lifted, then the stop linger 162 will be pulled down out o1l engagement with the tooth 10e- Simultaneously the arm 145 of the trip levei 141 will be depressed, pushing the forward end of the brake shoe liftinglever121 downwardly and raising the pressure plug 126. Thereby the pressure vor the stopped position.

.brake shoe on the clutch sleeve '-96 is relieved. Y

' tooth 1011.

The spring 111 (Figs. v9 and 16) `instantly causesy the stop sleeve 96 to rock,` thereby iorcinglthe balls 99 which project through y the holes 98 in the stop sleevelto climb up from low to high position in the grooves 9-1 or the wedges 93.` rllhereupon, when the balls get into thisliigli position they wedge be- I 'tween the wedges uneA the ball-retaining ring 99, and as this Vring is clamped in the pulley ,100, rotation of the pulleyrotates the ball- `against the sto) iner the' sto sleeve 96 n if v is rocked and its roekiiig movement carries the projecting balls 99 from the highv points of the wedge grooves tothe low points thereof, thus taking the balls out of contact with the' ball-retaining ring. At the Vsame time the reverse movement of the stop-motion control lever which is required to thrust lthe upper end of. the stop into the eccentric groove 105,Y raises the arm 145 of the stop lever 1&1 out of pressure contact with the 95 pressure plug hitting lever 121 andV vthen the spring 128 expands and forces the brake shoeagainst the stop sleeve 96. The brake shoe presses against the reduced diametric portions 103 'of the stop-sleeve. The parts in question arev sor timed that each opposite Vmov-uifient ot the brake'shoe and pressure-V plug and consequently of the pressure plug lifting lever 121, slightly precedes the initial opposite movements of the stop finger in its engagement and disengagement with the rFlic purpose of this timing is that the brake shoe in its braking movement against the stop sleeve 106 shall overcome the tension of the spring111 and the fact in Vthisconnection is that when the tension-oit the spring 111 is relieved or as it is relieved gradually, the balls are shifted correspondingly out of interlocking relation to the ballretaining sleeve and it is Vnoticeablethat the power transmitted through the balls to the shaft is under the'control ofthe spring 111. The result of this is in practice that there is a minimum of shock. y

1 have above referred to the relation of the'V cap 63 to the pulley or belt wheel hub 102. The belt wheel as shown has the ends of its projecting hub'annularlyv grooved at '102aat each end. rllhe outward end of the cap 63 which is endwise slidable lhas an annular opening, the annular edge of which faces the adjacent groove 102". Thepurpose of thisis to prevent oil from the ballbearings 35 from flying onto the belt. `At the otherside of the pulley, the purpose Yof the corresponding iio i shaft to permit its rotation, such mechanism comprising compressing members and means for holding between them a shock absorbing quantity of oil; an oil supply mechanism;

and a conduit connection between said means and mechanism.

2. The combination in any machine of a rotary shaft-with a stop motion mechanism constructed and operating to engage the shaft to stop its Arotation and to release the shaft to permit its rotation, such mechanism comprising compressing members and means for holding between them a shock absorbing quantity of oil; an oil pump; and conduit means for supplying the oil to the oil holding means. v

The combination of a drive shaft; a stop motion for the shaft; a stop motion control mechanism; and an oil supply pump mechanism comprising means for holding a` shock-absorbing body of oil to relieve shock I on the shaft7 stop motion and stop motion y control.

4. The combination of a drive shaft;1a stop motion for the shaft; a stop motion control mechanism; and means for supplying and holding a shock-absorbing body of oil in the stop motion control mechanism; and means for automatically replenishing the oil forming said shock-absorbing body.

5. T he combination of a rotary shaft with a stop motion comprising a brake shoe; a brake-shoe lifting lever; a trip lever coperating with the brake-shoe lifting lever; a stop-motion control lever; an endwise movable stop-finger for the stop-motion and constructed and operating to engage and disengage a toothed member of the stop [motion and to coperate with the stop-motion con-l trol lever; the latter being provided with fluid compressing members constructed to receive between them .a volume of oil and one of said members being movable and locate( to cooperate with the stop finger; and an oil y pump.

tary shaft with `a stop motion mechanisml comprising an vannular ball retainer on which the pulley is fined; a series of'balls;"a series of `Wedgeson surfaces of which the balls are nionnted.; the shaft having wedge-receiving pockets; an exteriorly toothed sleevehaving ball-receiving holes through which the ballsV progect, the sleeve being-mounted between the wedges and the ball retainer; means for.

cooperatively connecting the shaft and vsaid toothed member; a stop-finger for engaging the tooth of thetoothed member; a brake shoe; and brake-'shoe operating mechanism.

8. The combination of a rotary shaft provided with a series of peripheral pockets each for reception of a wedge; a ball on each wecce an exteriorly toothed sleeve having ball-receiving holes and mounted on the e a L ru f snait with the balls projecting; kan annular ball retainer and pulley carrier; said sleeve having alengthwise extending lreyway and the shaft being formed with a lengthwise extending key; thelreyway and key when in v-Jorlring position having relative' rotational .lations with an oil-receiving space in the way; operative connections between the shaft and toothed sleeve; a stop finger; stop-finger actuating mechanism; a brake shoe; and brake-shoe operating mechanism; the stopvfinger actuating mechanism comprising an oil reservoir and oilv compressing members oneof which is in cooperative relations totheA stopiinger.

9. rlhe'combination of a rotary shaft; av stop-notion mechanism therefor comprising a stop finger; and a stop-motion control mechanism comprising'a 'lever which has an s oil container and oil compressing members one of which is movable and in operative relation to the stop-finger; and an oil pump.

Y l0. The combination of a machine havinga cliambered member; a .shaft bearing mounted in a part of the chamber of said member, a part of such chamber serving as an oil container; a stop motion for the shaft mounted on the bearing and constructed for dow of oil from the reservoir to the stop motion parts; a pulley operatively connected with the stop motion, the latter comprising a shaft engaging member; a stop finger operatively connected with the stop Vmotion; vand a stop-motion control mechanism comprising a lever having oil compressing members in operative relation to the stop linger. li. A. stop-motion control lever having an oil container; an oil filter therein; a rigid wall ported foi' flow of oil from the container to a side thereof; a rigid plug having a tang; wall of the plug being opposed to and spaced apart from said'wall; a fixed iio " while the sewing machine is sewing, Y

sleeve having oil ports; a coiled spring on the plug tang; and a thimble inclosing the spring kand slidable inthe sleeve; in combination with a stop-motion mechanism and a shaft to be stopped. 1

l2, The combination of a rotary shaft; a

stop-motion mechanism for the shaft and carrying a brake shoe; a pulley carried by the stop motion; a pressure plugfor the brake-shoe; a pressure-plug liftinglever; a stop' finger-"for the stop motion; stop-motion control lever and a trip lever carried by the control lever in cooperative relation to the 'pressure-plug lifting lever; and means for Vholding and compressing a shock absorbing volume of oilY for taking up shock on actuation of the stop motion for arresting the Yrotation ofthe shaft. v

Y 13'. The combination of a rotary shaft Vwith a stop-motion mechanism'therefor; an oil supply mechanism comprising a pump.;

Vand a stop -motion actuating mechanism comprising a VreceptacleV for receiving oil from the' oil supply means for holding a' shock-absorbing 'volume of the oil and comprising other meansV for compressing such oil volume andi-thereby taking up shoc. on actuation of the ystop-motion mechanism for stopping the shaft through cooperation of thestop-motion actuating mechanism with the oil compressing means'.

j 11i. The kcombination fof a sewing machine; av shaftsengaging stop-motion comprising an oil-cushion-forming mechanism constructed and operating substantially as described; means whereby the oil cushion takes up` the coupling rshock instopping the machine; means for automaticallysupplying oil to create and maintain the cushion; and means for operating the stop-motion 1` 15. VThe combination of stitch-forming the chamber by said pump.

lmechanisms comprising a-driven shaft; a

stop-motion for such shaft; a stop-motion actuating mechanism comprising a chamber for reception of oil; an oil pump operatively connected with such chamber; a plunver; andV means actuatedby the stop-motion for actuating the plunger, the latter working in said chamber and working in one direction against a body of oil maintained in ,16. The combination of a shaft with a stop motion therefor, said stop motion comrisinfr members vfor en a in and disenb g Y gaging the shaft to stop it, actuating means for said members, and an automaticallysupplied oilcushion to prevent shock be-V tween coperating membersfof the stop mo-v tion.

Y 17. In the structure of vclaim 17;*Vthe stop-V motion structure comprising a lever actuatable by an adjustable lever.

18. The combination with a drive-shaft.; of a stop-motion constructed and'operable for engaging and disengaging said drive-v shaft; the stop-motion comprising` liquidcushionforming means; means for supplying the liquid-cushion-foiming'means with Y cushion-forming liquid; and means for actuating the stop-motion. y Y

19. The combination of a driven shaft; a

stop-'motion for such shaft; a stop-motion- Y actuatingmechanism comprising a chamber f for reception of oil; an oil pump operatively connected with such chamber;,thimbles ;.and`

Vmeans actuated by the stop-motion for actu-V I have hereunto set

Images