US2298665A - Pile-fabric sewing machine - Google Patents

Description

s. w. WESSON PILE-FABRIC SEWING MACHINE Oct. 13, 1942.

Fil ed Nov. 5, 1940 2 Sheets-Sheet 2 Patented Oct. 13, 1942 STATES PATENT oFF lcE:

" rite-manic sawmc mcnnva George W. Wesson, Bridgeport, Conn, assignor to The Singer. Manufacturing Company, Elizabeth,-N. J.,'a corporation of New Jersey ni rification- November 5, 1940, Serial No. 364,363

' Claims. (CL 112-4) This invention relates tosewing machines and has for an object to provide a sewing machine for usein neatly and securely finishing the raw- .aecompanying' drawings of a preferredembodiment of the invention from which the several features of the invention and the advantages attained thereby will be readily understoodby those skilled in the art.

Fig. 1 is a front side elevation, partly in verti-- cal section, of a portion of the bracket-arm and work-support of a sewing machine containing the present improvement. Fig. 2 is an enlarged fragmentary vertical section, partly in fronteletially parallel to the axis of rotation of the main shaft 1.

Also journaled for endwise reciprocationin the swinging frame II is' a vertically disposed feed-bar l6 carrying at its lower end a feedingfoot i1 having a serrated work-engaging face and provided with a needle-aperture It. The upper end of the feed-bar I6 is connected by a link I9 to one arm of a bell-crank lever 20, of which the other arm is connected by a link 2! to a crankarm 22 of. a horizontally disposed feed rock-shaft 23. The rock-shaft 23 is iournaled in bearing-lugs 24 extending from the rear side ries another crank-arm 25 connected to one end of a pitman 28 having at its other end a strap embracing an eccentric 21 carried by the main shaft I. l

The bell-crank lever 20 is fulcrumed, as usual, upon a. block 28 suitably secured to a vertically disposed Dresser-bar 29. The presser-bar 29 is vation, of the feeding elements and the work- I support, with a work-margin disposedtherebetween. Fig. 3 isa'front end elevation of the bracket-arm and a portion of the work-support. Fig. 4 represents a perspective view of the throatplate of the machine. Fig. Sis an enlarged top plan of the presser-foot, feeding foot and throatplate of the machine.

The sewing machine hasthe usual frame including a substantially horizontal work-supporting bed-plate I, and a hollow bracket-arm 2 terminating in a head 3 overhanging the bedplate. .Su'itabl'y secured upon the bed-plate i is v a throatmlat; l disposed between side slide- "and. v i

I lily'journaled inthe bracket-arm 2 is a horizontally'disposed main actuating shaft. 1', one end of saidshaft carrying-a crank-disc .I provided with acrank-pin I. .The crank-pin I is connected by a. link Iii to a vertically disposed needle-bar Ilcarrying at its. lower endan eyepointed needle i2. Anysuitable looper or looptaker mechanism (not shown) may be employed for .cooperation with the needle l2 below the throat-plated in'th'e formation of stitches.

'I'heneedle-bar ii is journaled for endwise reciprocation in a swinging frame i3, pivotally supported at the'upper end thereof by a fulcrumpin it secured in the bracket-armhead 2 by'a set-screw l5. The fulcrume pin I4 is disposed so journaled for endwise movement in the bracketarm head 3 and is yleldingly depressed by the usual spring 30. Attached to the lower end of the presser-bar is the shank of a presser-foot 3i provided, within the width of the work-engaging portion thereof, with a rectangular slot .32 af fording clearance for the feedingdoot H. The presser-foot Si is therefore divided by the slot 82 therein to provide laterally spaced work-engaging portions disposed at opposite sides of the feeding-foot i1, and the work-engaging faces of said presser-foot portions are preferably ser-,

equal in width to that of the feeding-foot .ll

opposed to the block face 28. The block. 28 is elongated in the line of seam formation, and the iengthof said block is preferably such as to support the feeding-foot I I throughout the workadvancing movement thereof. The face 28 of the block is also opposed to the heel portion of that the pivotal axis of the frame I2 is substanthe presser-foot 2|, thereby limiting downward movement of the presser-foot. Extending forwardly from, the front end of the of thebracket-arm 2, and said rock-shaft car- 7 I block 36 isa'prow'39, of whichthe upper-face substantially flush with the upperq'face 138"of Jthe-z work-supporting block and is opposed. by' the; toe of the presser- -foot'3 l. Theunderiface :oi the" prow Zfllis inclined upwardly-from the-block 3 51;-

toward the forward end of the'prow; andthe. opposite side facesof I thesprow are. convergentiy inclined forwardly, thereby forming a prowshav ing a somewhat pointed free forwardend spaced' from the-throat-plate 4", and having rearwardly divergent side walls' terminating in the upwardly convergent side' wallsof theblock: 36';

The needle-bar 'frame I3 is operatively connected to a crank-arm- 40 depending. from-1 a rock-shaft 4 I; disposed substantially parallel; to"- themain shaft 1' and journaled'in suitabie'abear ings providedinthe bracket-arnrd: Theroclr shaft 4| is actuated" by any usual. or: suitable mechanism andr'in timed-relation to the reciprocatory movements of the'needle I ziand ithelzfeed ing-foot I 1 t'o'impart work-advancing andreturn: movements to saidneedle andfeeding foot:

It is a" common practice in binding: thee'raw edges of rugs and similar pile-articles toattach "initially a binding tape t; to'the-pile'face "alon&"

the marginal portion ofithe base ma'terial rof the,

rug. This initial operation is; v for example; fuliy disclosed in the U S: patent to W; J. MoranyNol 1,975,728, Oct'. 2; 1934. Heretbfore, the atta'ched 'binding tape has been then folded about: the raw;

edge of therug andlblind stitched'to tlie 'under.

face of the rug base; the-blind-stitcliiiigbeing effected: byhand I or by blind-stitchingmachinesa- The blind-stitching operation. referred to is necessarily slow, and the binding tape is insecurely attached by the blind-stitches; The present invention; as abovedescribed; pro vides'for securely and'neatl'y attaching-thebinwing tape t to the under'faceoftherug-base r; Therug, with the; tape attached toand folded? aeeegeee' sitiom: Consequently; the; pile: remainscleanly,- separatedduring: thei'formationzof the; tape-attachingestitchea The 'presserefootiv 31-; is; of course; raised-. -and lowered: alternately; with the feedlngafoot .1 by, means-of, the actuating 1 COD: nections therewith; abovedescribedand :well vun'-- derstood l in the art: The tape: is :=thus securely attached toltheltbaseefabric offthe; rug rby-i stitches WhiCh1 8Ii cono'ealedmmthe piiezface, ofathei-rug; V

and( h opera-tiommayzbeeperformediwith asum cien't apidityj: to; substantially/ ir'i'crease-v producetio'niasz 'compared witiigtlierblind stitchingx operatione'heretoforezperform'ediforrthe samezpurposet.

about the raw edge thereoi is'passed; pile f'ace down, over thework-supporting. block. 36% and underthe presser-foot 3i and feeding-foot" Hz. The prow 39 functions to separate thedfependingii pile p along" the line of needle' penetration of i the" base-fabric r, and as the prow 39 is flush. with the upper face 380i the work-supporting block 36 the pile p is initially separated directly atthe pile-face of the base-fabric r. The rearwardly, divergent side walls of the prow 39 and the'downwardly divergent walls of the work-supporting block 36 together function further to separate. and to maintain separation of the pile 3: untilafter the stitches are set, thereby insuring that the stitches are cleanly buried between the pile-- fibres and anchored against the pile-face of the: fabric-base.

In the operation of the machine, the feedingfoot I! descends until it engages the. work. As the work is supported by the raisedupper. face 38 of the block 38 in the area of the work enga'ged by the feeding-foot I1, the work isfree from buckling or crimping under the action of the feeding-foot, whereby the tape 75 may be properly attached.--The needle l2 descends during the work-engaging movement of the feed-- ingfoot I1 and, after penetrating the base fabric; passes downwardly through the work-supportingi block 38 which maintains the pile separated. The needle l2 while in the work partakes of'the work-advancing movement of the feeding. foot I?- and then rises a substantial distance in advance of the rearward end of the work-support.- ing block 36, sh that the stitches are set; before: the separated pile is free to resume its normalpo- Havihgthussetifbrtiiithe;natiire;of;the;inven+ tionvwha lciclaiinuhereinpaisiI 1: pile=falirics sewing machine:- having.-:

stitcheformingaandi-work eedingmechanisms;a;

pile-dividing?memlien liavingsaisubstantiallyrflati; work-engaging,-

tapered? ti-its: forward: end .1

to-yformia;pointedipile-dividing prowxdis'posediim advance. or? said: stitch-forming; mechanism, the;

point*- on? said? prow; being; disposedi substantially in; thezplane" of; the; work engaging; face; of said a member for! initially engaging; and? dividing thefabric plleiatithevbasesethereoiitoareceivestitchesz therebetweeni 2: 5 pileefabrie .sewinggmachine; having. a.= bed-- plate; .stit'cheforiningimechanisxnincluding: a. reciprocatoryneedle}. a": work-supporting: block ris+ ing? from said. bedeplate and; having a, substan;- tiailyf flat. upper face; provided with. a; needle,-' openingsaidi block extending; lengthwise ini theline ofQseam formation; work-feeding; means ,ep posedt'ofthenpperaface of saidibloek;;and aiprow extending forwardly from said work-esupporting: block lengthwise thereof; saidiprow having a pile-dividing; pointed. free enci disposed substantially; the plane of; said flat: upper 'face; of;- the, block. v

3. AKpii'e-efabric. sewi'ngr-v machine2hav1ng=a2 bedp'lat'e stitCh' fiJrmingL mechanism including a: re;-: ciprooato'ryl needle; v a1 work-supporting. blbck: rising f-io'r'risaid bed plat'e'; and: having; a", substantiallyflata. upper face providedwith*-v at needle;-- opening;-. said block- 4 extending lengthwise; in; the line of scam formation, work-feeding. meansopposed torvthe upper face of said block; and a pile,- dividingv Pointed prow extending forwardly fromv 7 said work-supportingblock lengthwise thereofandin spaced'relat'ion. to said bed-plate, the pointy at said? prow being; disposed" substantially in the plane? oil said fiat upper face ofthe block.

4:. pil'eefabric sewing. machine having a: bed-- plate; stitch-forming; mechanism including. a. re,- ciproc'atory needle at work-supporting; block rising. from. said bed-plate and, having" a, substantially fi'a't upper face. provided with a needleopening, said' block extending. lengthwise in the line oi seam formation, work-feeding means op posed to the upperface off said: block, and", a pointed pile-dividing; prow extending forwardly from said work-supporting; biocie, lengthwise thereof and in spaced relation, to said, bed-plate,

said prow having rearwardly' divergent side faces a pointedr'ree end disposed. above the level of downwardly divergent opposed side walls and being provided with a needle-aperture medianly of the width of the block, work-feeding means opposed to said block, and a pointed pile-dividing prow extending forwardly from said block lengthwise thereof.

7. A pile-fabric sewing machine having a bedv plate, stitch-forming mechanism including a reciprocatory needle, a work-supporting block rising from said bed-plate and lengthwise extending in the line of seam formation, said block having a.substantia1ly flat upper face provided with a needle-aperture, and said block having opposed side walls downwardly divergent from said face, work-feeding means opposed to said block, and a pointed pile-dividing prow extending forwardly from said block lengthwise thereof, said prow having rearwardly divergent side walls and having the forward point thereof spaced from said bed-plate;

8. A pile-fabric sewing machine having a bedpla'te, stitch-forming mechanism including a reciprocatory needle, a work-supporting block rising from said bed-plate and lengthwise extending in the line of seam formation, said block having downwardly divergent opposed side walls and having a substantially flat upper face provided with a needle-aperture medianly of the width of the block, work-feeding means opposed to said block, and a pointed pile-dividing prow extending forwardly from said block lengthwise thereof, said prow having rearwardly divergent side walls terminating in the divergent side walls of the block and having the point thereof disposed substantially in the plane of the upper face of said block.

9. A pile-fabric sewing machine having a bedplate, stitch-forming mechanism including a reciprocatory and laterally vibratory needle, means for reciprocating said needle, a work-supporting block rising from said bed-plate and lengthwise extending in the line of seam formation, said block being provided with a needle-opening medianly between the side walls of the block and elongated in the line of seam formation, a piledividing prow extending forwardly from said block, a feeding-foot opposed to the upper face of said block, and means for imparting workadvancing movements to said needle and feedin foot.

10. A pile-fabric sewing machine having stitchforming mechanism including a reciprocatory needle, a work-supporting block lengthwise extending in the line of seam formation, said block having a substantially flat upper face'and being provided with a needle-opening medianly of the width of the block, a pile-dividing prow extending forwardly from said block and having rearwardly divergent opposed side walls, a presser-foot movable toward and from the upper face of said block, a feeding foot opposed to said block, means for imparting work-engaging movements alternately to said presser-foot and feeding foot, and means for imparting work-feeding movements to said feeding foot lengthwise of said block.

GEORGE W. WESSON.

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