US1573225A - Sewing machine - Google Patents

Description

Feb. 16,1926. 1,573,225

H. CORRALL ET AL SEWING MACHINE Filed Feb. 25, 1924 5 Shets-Sheet 'l flea INVENTOR ATTORNEY Feb. 16,1926. 1,573,225

' H. CORRALL ET AL SEWING MACHINE Filed Feb. 25, 1924 5 Sheets-Sheet 2 INVENTOR flwar/rc gb/mnzz Jam Ana/ms: fizz w:

Feb. 16 1926.

v 1,573,225 H. CORRALL ET AL SEWING momma Filed Feb. ,5, 1924 5 Sheets-Sheet 3 ATTORNEY Feb. 16 926. 1,573,225

H. CORRALL ET AL SEWING MACHINE Fi 2 24 5 Sheets-Sheet 5 0 Jimm 41/132011 6mm;

ATTORNEY ing arm or bed by an inexperienced Patented Feb. 16, 19?.

'KERBERT, COR-BALL, or ir'nnnitsiannen,

G YDE'BAN'K', soornann, ris'slenons PANY, ornmzasnr'n, new JERsEY,

snwfne Application file d February To a?! whom it may concern Be it known that we, HERBERT Conniimi and Brennan Anencsn S'rnvnws, both subjects of the King of Great Britain and Northern Ireland, and residing at Helensburgh; Dumbartonshire, Scotland, and Glydebank, Dumbartonshire, Scotland, respectively, have invented a certain new and useful Imoroveinent in Sewing Machines, of which the following is a specification.

This invention relates to a sewing machine for stitching tray purses, pouches and the like and liasfor an object to provide a construction which can be readily" operated attendant; other objects and advantages are hereinafter indicated or will be understood from the following description. t

In the sewing machine of the invention, the free end portion of the work-supportand the portion of the l throat plate in which the needle aperture is formed are inclined downwardly, so that the work resting on the inclined surface thus presented is obliquely disposed relatively to the path of the vertically movable needle;

For feeding and clamping the work there employed a duplex-feeding and clamping device which performs feeding movement-s while the needle is above the work and which also performs rising and falling movements in the interval between the mo ment of penetration of the work by the needle and the completion of the downstroke of the needle, the movements of said device being derived from cams on the needle-bar actuating shaft. 7 V

The said device includes a feeding foot adapted to hold the body or tray of the purse against the throat-plate, said foot being secured to the lower end of an inclined clamp arm or feed lever having at its upper end auniver sal oint connection with a sup- T portbeneath the overhanging arm of the machine. A presser foot or purse guide in superposed relation to the feeding foot and undercut on itslower face to present a pres sure surface engageable with the edge of a side strip forming a wall of the purse, for exa1nple is removably secured to the lower end v. f se ondary clamp-arm or lever.

PATENT OFFICE.

AND IBERTRAM AMBROSE STEVENS, OF T0 SINGER MANUFACTURING COM- A CORPORATION OF NEW JERSEY.

MACHINE.

23, 1924. Serial No. 694,492.

mounted at its opposite end to rock on the same horizontal axis as the feed lever. Near its lower end the secondary arm or lever is guided bet-ween lugs upstanding from the feed lever. The presser member or purse guide is normally spring-urged towards the feeding foot and controls the upper edge of the side strip. preventing it from rising as the needle ascends from the work, besides maintaining the work in position relatively to a needle guard.

The feeding movements are derived as aforesaid from a cam on the needle-bar actuating shaft through connections including rock shafts, one at each side of the bracket arm, one of said shafts having 2 arm connected by a link to a feed-driving lever mounted for lateral vibratory movement and vertical reciprocatory movement and having a ball-joint connection with the feed lever, so that vibratory movements of the feed-driving lever result'in feeding and return movements of the feeding foot and purse guide. The feed-driving lever is piw oted at its upper end to a cross-head secured to the upper end of a spring-pressed bar which takes the place of the usual presser bar, said cross-head being also secured to a vertically movable follower or plunger influenced by a lifting cam at the forward end of the needle-bar actuating shaft, whence the feeddriving lever derives up and down movements which are communicated to the feeding foot and thereby to the purse guide.

The needle-guard above referred to is beveled inwardly at its operative end and spaced from the edge of the feeding foot.-

stitching point, showing the commencement of the first stitching operation, the side strip being stitched to the pocket half of the purse body, the pocket havingbeen prev ously formed by cementing the outer skin to an inner flap-carrying lining and finally secured by the stitching. Fig. 2 is alikevie'w to Fig. 1 showing the second stitching operation, i. e, showing "the pocket half with attached side strip being stitched to the main body part, the stitching having reached the tab and the edge guide having beenretracted.

Fig. this a similar view showing the stitching nearlycompleted, the throat-plate extension having been swung outwards as the stitching approached thefinishing point to allow the purse tov be bent as shown and thus permit the stitching to be carried. to the end of the. sidestrip. At the stage represented in Fig. 3 approximately three stitches are required to finish the purse. r'iS. a perspectiveview of the complete machine as seen from the front, 5 D

' Fig. 5 a perspective view as seen from the rear..

- vF 6 is a view ofthe underside of the bed. i I I V Fig. 7 is an end elevation of the machine with theface plate, the feed lever, and the guide lever removed.

Fig. 8 is a fragmentary section showing the lifting cam ano cooperatingplunger.

Fig. 9' is a detail view of the feed lever, the guide lever, and the universal joint support therefor. Fig'lO is a section ofthe machine frame.

Fig. 11 is a detail view otthe feed cam.

Fig. work-supporting arm.

Fig. 13 is an inverted plan of the needleguard and edi s-guide.

Fig. 1% is a perspective view of part of the shuttle-i'lriving mechanism.

through the standard Fig. 15 is a detail view of the purse guide.-

The machine frame comprises a base 1 "t 'tl l'h' -h" *1 iii c re. n1 1 y. no is a ollzonta n01 -supporting arm Q the free end portion of in bea vwhichis inclined downwardly at an angl o 45 Also in'tergral with the base i a d 3 of the hollow bracket arm pc i on i of which overhanging the welit-supporting,arm 2 terminates in the head-5f L i v Journalled for vertical reciproc ng movements in bearings in the head 5 is the needlebar ii; f 'nncctions 7, 8 with the rotary "needlebar-actuating shaft 9 journalled as 'ngsj in the bracket arm. 7 Clamped to the needle bar (S'is the eyepointed needle '10 'which tie-operates in known'inanner in the formation ofstit'ches;

w h a shutt e.

'larly to the portion 23 12 is a fragmentary plan of the is free 6 having the usual crank and usual;

' toot are der ved from t in? the lever: 43 I y 44: carrying a slottcd' 'segnient lever 45' to sweetie escillatinnwh eh .e j tab yconnected one eadfoi nected by a pitman 21 to a ball crank 22 on the needle-bar actuating shaft 9.

Secured as by screws to the work-supporting arm 2 is the throat plate comprising a plane horizontal portion 23 and a portion 23' of less width, and formed with a needle aperture,'inclined downwardly to be flush with the free end portion ot'the arm 2, so that the work resting on the inclined surface thus presented is obliquely disposed relatively to, the needle 10;

Above th e'inclined portion ofthe'throatplate is a feeding foot 24 of which the approximately L-shaped shank is adjustably secured by screws 25 to an arm 26 projecting laterally from the lower end ofthe long feed-lever 27 which .is inclined simiofthe throat-plate and the upper end of which is formed as a yoke 28 penetrated by a horizontal pivot pin 29 transverse to the shaft 9, which pin 29 also penetrates lugs 30 on a bracket member 31 'mounted to turn around avertical pivot 32 projectin through thelower side of the overhanging arm I Iii-superposed relation with the feeding foot 24 isa pressengriide 33 undercut on The presser-guide is normally urged downwards by the helical tension spring 39, one end of which 1S connectedto an eye on the lever 35 and the other end of which is connected to an anchorage post" il-Oadju'stably secured by a screw 41-1' to the feed-Iever'Z lVith the arrangement described the lever ti'i'swing upon the axis of the pin 29 conjointly with the lever 2? as well as indep endently thereof, both levers 27'and 35 turning together around pivot 82. Q i r V The feeding mei'ements of the feedinghell canrifi actuatingshaft iniiue clamped to a rec -s on thc'needlethe vertical a. link l6 connected at its other end to a crank arm 47 of a horizontal rock-shaft 48 parallel to the shaft 9 and having at.

its forward end a depending arm 49 coirnected at its lowerend by-a link 50 to the vibratory feed-driving lever 51 tothe lower end or which latter 18 secured by a screw a block 52 having abifurcation which is received a ball penetrated by a pin 54 adjustably secured by a screw 55 in asoc-kct 56 integral with an arm 57 projecting' laterally from the lower end of the teed-lever 27. i

The ball 53 is norn'rally prevented from falling out of its seat in the block 52 by a screw 58.. The ball-joint connection may be temporarily disconnected by loosening the screw 55and withdrawing the pin 54; from tlie 'socket 56,so that the feed-lever assembly may be swung aside when required.

Journalled in thehead 5 is a vertical bar normally depressed by a helical spring (50 surrounding the bar anda-butting on a collar 1 The feed'ng 61 adjustable on. the bar. Clainped to the upper end of the bar 59 projecting through the head 5 is a cross-head 62 to which ispivotally connected at 63 the upper end of the feed-driving lever 51.

Lifting movements of the feeding foot 24 and guide 33 are derived froma hiting cam 64 fixed to the end face of theusual take-up cam- 65 on the needle-bar actuating shaft- 9 and acting on a. vertically movable plunger pin 66 secured by the screw 6'? to the cross.- head 62which transmits vertical movements tofthe feeddrivingf lever 51, transmitted in turn' to the ie'edlever 27.

flrntegral with the collar 61 is the lifting bracket 68 with which cooperates the lifting starting point and engage the work as the needle 10 reaches the lowest point of its strohe- 5T2 denotes a stationarv needle guard secured by screws 73 o the horizontalportion of the throat-plate whereby the needle ll) issolidly supported in its descent into the 7 work.

The "notche'c'l seventeen or the needle guard 72 and the bevelled edge Mot the 'ieeding foot 24 form in conjunction two walls etween which the side 75 of the parse foot 24: andguide 33 return to.

76passes, the spacing of such walls being variable to suit differentthicliensses of leather by adjustment ofthe screws 25, the space between the walls being roofed by theguidc 33.

7? denotes a purse-edge guide guided to slide between the needle guard 72 and the throatplate and serving to control the edge of the body of thepnrse 76, said edge guide '77 having a lateral arm 78 to the free end of which is. pivoted an arm T9.

The edge guide 77 is retractible from operativeposition to allow the tab 80 of the purse to pass under the needle guard 72 as shown in Fig. 2, retraction bein eli'ected l y pinching together the arm T8 and the spring-influenced catch lever 81 pivotedat to the needle guard 72 andhaving a notched arm 83- engagea'blc by a pin 84; projecting from the arm 79, a spring 85 being interposed between the arni 83 and the needle gugird 72. After the tab 80 has passed under the needle guard 72, the edge guide '77 is restored to operative position bypressure on the arm 78 to effect engagement oi the pin 84: ,with the notch in the arm 83.-

85 denotes a finger or extension of the throat-plate fixed to a pivot pin 86 having its bearing in afixed bracket 87, said finger being normally held by the action of a spring 89 against the forward edge oi the inclined portion of the throat-plate but being adapted to be swung aside as shown in Figs. 3 and 12.

.lVhatwe claim is 1. In a sewing machine, in combination. a needle, means for eiiecting reciprocating movements of said needle. a throat-plate including a portion obl iquelyz disposed relatively to the path of the needle, said portion having-an aperture pc-netrable by said needle. a clampin and loading device above the throat-plate, means for in'ip'arting feeding movements to said device while the needle is above the throat'platc, and means for imparting rising and falling movements to said device in the interval between the penetration otthe aperture by the needle and the completion of the downstroke of. the needle.

2; In a sewing machine. in combination. a needle, means for effecting reciprocating movements o'li' said needle :1 throat-plate in eluding portion obliquely disposed relatively to the path of the needle. said portion having a needle-aperture pcnetrable by said needle. a clamping and feeding ioot above said obliquely disposed portion. a feed-lever inclined similarly to said portion of the tln'oat-plate. said lever carrying at one end 'said feeding foot and being supported by a ersal jointatijtsopposite end. and means on said lever adjacent to said first mentioned end forimparti11g teedinginove IUGIliS'tO said feet while the needle is above the throat-plate and for impartingrising and falling mo ements to sai foot in he interval between the'penetration of the aperture by the needle and the completion of the downstroke of the needle.

feeding foot, a feed lever. inclined to the needle aath said lever carr in said feedin 7 b foot at one end and being supported by a universal joint atits opposite end, a guide in superposec'l relation to said foot, .a lever carrying said guide'and movable with and independently of saidlever, spring means urging said guide towards said foot, and

means for imparting feeding movements to said foot and guide while the needle isabove the throat plate and for imparting rismg and falling movementsto said foot and guide while the needle eye is below the throat plate."

111 a sewing machine, in combination, a reciprocatory eye-pointed needle, a needleactuatin'g shaft,'a throat plate, a feeding foot above said throat plate, a feed lever inclined to the needle path, said lever carry- 7 mg on oneend said feeding foot and being supported by a universal joint at its oppositeend, cams on sa1d shaft, spring means tendin to'de dress said feedin foot towards said throat plate, and means influenced by said cams for imparting feed ng movements to said foot-while the needle is above the throat plate and for imparting rising and falling movements to said foot while the needle eye is below the throat plate.

5.111 a sewing machine, in combination, an eye-pointed needle, a needle-actuating shaft for imparting reclprocatory move' mentsto the needle, cams'on said shaft, a throat plate penetrable by the needle and including a portion disposed obliquely'in relation to the needle path, a combined clamping and feeding device including a feeding foot having its operativeface disposed obliquely to the needle Jat-h sorin means ur in said M q a l o 1 b a feeding foot towards'the tnroat plate, a'feed driving lever, connections including a link between said lever andsai'd feedlng foot, and connections between said cams and said lever for ii'nparting vibratoryand' bodilyreciprocating movements to said lever whereby to effect feeding and lifting movements of said feeding foot. r

6. I I a sewing machine, in combination,

a reciprocatory needle, a throat plate in:

cluding a portion obliquely disposed rela tively to thepath of -the needle and having a needle aperture penetrable by the needle,

, a duplex clampingand feeding device above the throat plate comprising a 'feedingffoot and, a secondary foot in superposed relation to said feeding foot,-said feeding foot having an edge inclined to the needle path and a needle guard secured to said throat plate, said needle guard having a bevelled end spaced from said inclined edge, the space betweensaid beveled end and said edge being roofed by said secondary foot.

7, In a sewing machine, in combination, a reciprocatory needle, a throat plate in: cluding a portion obliquely disposed relatively to the path of the needle and having a needle aperture penetrable by the needle, a duplex clamping and feeding device comprisinga feeding foot and a guide in superposed relation, a needle guard secured to said throat plate and having a bevelled end spaced from the edge of said feeding foot, an edge guide" guidedfor sliding movement between said needle guard'and said throat plate, and manually operable means for compleinental to said portion of less width,

said extension adapted to be swung into" andioutof contiguous relation with said portion of less WlCltll;

vQQ A sewing machine having, in combination, stitch-forming mechanism includmg a reciprocating needle, a work-support, anupperfeed-foot, means for imparting rising-and-falling and feed-and-return 1novements to said feed-foot,- and aispringpressed presser arranged to continuously and yieldingly engage the work during the sewing and partake of the feed-and-return movements of the feed-foot.

10. A sewing machine, having, in combination, stitch-forming mechanism including i a reciprocating needle, a work-support having'a portion obliquely disposed relatively to the needle-path-but substantially parallel to the line of feed,'an upper'feedbar dis-, posed transversely of the line of feed and inclined to theneedlepath, a spring in fluenced presser-member movably mounted on said feed-bar, a feed-foot carried by said feed-bar, and means for actuating said feed-bar.

rinannarconuann V e BERTRAM AMBROSE srnvsus.

In testimony whereof We have signed our names. I

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