US2461862A - Sewing machine - Google Patents

Description

' A5 H. WEIS SEWING MACHINE Feb. 15, 1949.

Filed Oct. 2, 1945 2 Sheets-Sheet 1 7 INVENTOR Albert H Wei eceased. By Barfiara Weds Execaqirix' BY auo m ATTORNEYS 2 Sheets-Sheet 2 A. H. WEIS 1 SEWING MACHINE Feb. 15, 1949.

Filed 061;. 2, 1945 INV ENTOR H Webs, eas ci Wags Executrix:

. ATTORNEYS 59 Barbara Patented Feb. 15, 1949 ATE'LN OFFICE 2,461,862 SEWING MACHINE I Albert H; Weis', deceased, late of South Nyack, N. Y.-, by Barbara Weis; South Nyack, N. -Y., executrix assignoi to Willcox & Gibbs Sewing Machine Company,New York,.N. Y.,.a corporation of New York Application-October 2, 1945; Serial'No. 619,762 2 Claims. (Cl. 112-214),

This invention relates to sewing machines-and more particularly to puller-feed mechanisms of sewing machines.

Puller-feed. devices are commonly employed where'xit' is;necessary to handle heavy work or material in a. sewing. machine. and. also when a crimped, creased-or plaited effect on the material is; desired- A usual procedure, where sucnwork was. who done, has been to utilize a separate puller-feed machine which was placed in back of the regular sewing machine, and coupled to the latter for operation thereby. This arrangement was satisfactory in most cases, except where,.for instance,- shor-t stitching runs were being regularly made;;with' a crimped effect, as in the case of infants garments and the like. In such instances the comparatively substantial distance between the puller feed and the stitching mechanisms proved. to be too disadvantageous.

While machines have been devisedwherein the puller feed was located closely adjacent the regular feed and stitching means, to cope with work having short runs asabove mentioned, the pullerfeedmechanism occupied space that was needed for the work material, or for the convenient operation ofthe machine, and therefore it was found that interference was had with the sewing operation. I

'An object of the present inventionis to provide an improved sewing machine with puller feed which obviates the above disadvantages and drawbacks, of prior devices, and which enables sewing of. all types, wherein puller feeds may be found desirable,'to be quickly and conveniently done. This. is accomplished by the provision of a novel mechanism comprising puller-feed rollers and juxtaposed stitching and feed dog means, the rollers and drive for the same being so arranged that the space about the stitching and feed dog means, and especially between the overhanging arm and the'base of the machine, is free of impediment. Thus, except for the presence of the puller-feed rollers, thespace available for the work material, and for manipulation of the latter and operation of'the machine is substantially equal-to that in a machine not having a puller feed. This is distinctly advantageous, since it makes possible quick and convenient sewing of. all of'the'various-types of work wherein a puller-feed is found desirable or necessary.

A- feature of the invention resides in the small inertia which characterizes the construction of the puller-feed rollers and associated rotatable components. As a result, the tendency toward overrunning of the rollers is held to a minimum.

Other features and advantages will hereinafter appear. I

In the accompanying. drawings:

Figure lis area'r elevation of a sewing machine and puller-feed made according to" the invention", illustrating an embodiment thereof.

Fig. 2 is a. fragmentary side'elevation of the eccentric and drive linkage from the main machine shaft to the driveshaftv of the. puller feed;

Fig. 3 is a .detail illustrating the; adjustment means of the eccentric on the main drive shaft of the machine.

Fig. 4 is'a left endrelevationof the machine;

Fig. 5 is a fragmentary section taken. on-thevline 5 -50f Fig.4.

Fig- 6 is a fragmentary section on line. 5--8i of Fig. 5, and

Fig. 7 is a fragmentary section online 1-'I.of

' Fig. 5.

Referring, to Figs. 1 and.4, the. sewing machine of the present invention comprises base Illhaving an uprightpost II and overhanging arms I2 which latter terminates in a presser-and-n'eedlebar head I3. The head I3 functions as-a bearing for a-presser bar'ld and needle bar I5 of the usual construction, and cooperating with the presser foot Ificarriedby the bar I4 are feed dogs I1, Fig. 4. As shownin Figs. 1, 2 and 3, the machine'has an upper mainshaft generally designated by the numeral I8.

The framework generally, with the exception of the head I3; and the stitching and feed-dog mechanism of the machine illustrated are similar to those found in the Metropolitan type sewingv machines, as used for hemming and inserting, of elastic.

According tothis invention, the-head I3 of the machine is formed to support a second? presser bar l9, Figs. 1 and 4, whereby apuller feed may be located directly adjacent and to the rear of the presser foot I6, the puller feed and drive means thereforbeingso arranged and constituted as to not be an impediment in the space above the base I0, about the. presser and needlev bars f4 and I 5, and especially between the arm I2 and the base I0.

By this arrangement it is possible to sew, with easeand facility, all types of articles and materials requiring the use'ofv a puller feed, even where only short stitching runsare found. Access may be had on both sides of the puller feed to the materials or article being sewed, and no cramping of fingers or other interferenceis experienced.

As shown, the presser bar I '9 is slidably carried inbearings 2Dand 2'l'of the head l3,. lo cated -to the rear of the presser bar M. The bar l9 is thus vertically movable, and is yieldably held in lowered positiOn by a compression spring 22 the ends of which respectively engage the end of the bearing and a collar 23 secured to the bar.

To prevent the latter (from turning, the collar 23 is provided with an extension 24 projecting into a slot 25 in the head l3.

Raising and lowering of the presser bar I9 is accomplished by a lever 26 carried in a slot in the housing l3, the lever being pivotally mounted by a screw 21 on the head, and having a camming body portion 28 engaging the underside of the collar 23.

The lower end of the, presser bar l'9 has a yoke 29, Figs. 1 and 5, with two depending arms 30 and 3i through which a shaft 32 extends, the latter rotatably carrying a cylindrical block or core 33 which in turn fixedly carries a sleeve 34 and ribbed feed roller 35. The ends of the shaft 32 may be drilled and tapped for screws as shown, to prevent its endwise movement or rotation.

The lower end of the presser bar l9 thus rotatably carries the feed roller 35, and for cooperation with the latter -a correspondingly ribbed roller 36 is provided, rotatably mounted on a shaft 3'! carried by a support 38 (Fig. 1) rigid with the base 19. As shown in Figs. 1, 4, 5 and 7, the cloth plate 39 of the machine is cut away to permit the roller 36 to extend through it, and to mesh with the roller 35.

When the lever 26 is in lowered position, as shown in Figs. 1 and 4, the spring 22 yieldably holds the upper roller down so that it meshes with the lower roller 36, and therefore the two rollers will always move simultaneously and with equal peripheral speeds, even though work material is interposed between them. As shown in Figs. 5 and 7, to insure the work material leaving the lower roller 36 after it has been fed past the latter, the roller has peripheral slots 40 into which extend fingers M, the latter being secured to the underside of the cloth plate 39.

According to this invention a novel drive and control mechanism is provided'for the rollers 35 and 36 which is effective and yet extremely compact and so arranged that no space at each side of the rollers is required or taken up, nor any space occupied, as for instance between the arm l2 and the base H] which might interfere with the movement of the work material through the machine, or with the manipulation of the latter by an operator. 7

This is accomplished, in the embodiment of the invention illustrated herein, by the provision of a pair of compact one-way clutches which are substantially wholly carried within the upper roller 35, and by the provision of a linkage or drive mechanism connected with one of said clutches which generally follows the outline or direction of the head 13 and arm I2, so as to leave clearance around the latter, above the base 19.

Referring to Figs. 5 and 7, a one-way clutch 42 is provided within the roller 35, connected with a plate 43 interposed between the end of the roller and the arm 36 of the presser bar Hi. The plate 43 is apertured to permit the shaft 32 to pass through it, and is provided with a slot 44 for receiving the head of a screw 45 threaded into the arm 39. Thus, the plate 43 is anchored or prevented from turning, which enables the clutch 42 to prevent reverse or counterclockwise rotation, see Fig. 7, of the roller 35.

The clutch 42 comprises a stationary member which is in the form of a centrally apertured disk 46 carried on the shaft 32 wholly within the roller 35, the disk fitting between the core 33 and the plate 43, so as to be flush with the end of the roller 35. The periphery of the disk 46 has a plurality of cuts 41 providing wedging surfaces 48, and wedging rollers 49 are located in the cuts 41', for engagement with the surfaces 48 and with the inner periphery or bore 50 of the roller. The disk 46 is also recessed to carry coil compression springs 5| which yieldably hold the rollers 49 in wedging engagement with the said respective surfaces. If desired, suitable wear-resistant insets 52 may be provided in the wedging surfaces 43, as shown.

The disk 46 is secured to the anchor plate 43 by countersunk flat head screws 46a, so that it is prevented from turning.

It will be seen that the roller 35 may be rotated in a clockwise or forward direction, as viewed in Fig. 7, but due to the wedging action of the rollers 49, is prevented from reverse or counterclockwise turning.

By this construction an extremely compact structure is provided for controlling rotation of the feed roller 35, and no space is required by the structure on the outside of the arm 30.

For the purpose of intermittently driving the feed roller 35 forwardly, a second wholly-containedone-way clutch 53 is provided within the roller. Referring to Figs. 5 and 6, this second clutch comprises a centrally apertured disk 54 which is carried on the shaft 32 within the other end of the roller 35 adjacent the core 33. A plate 55 is provided adjacentthe disk 54 the plate being apertured to be carried on the shaft 32, and being interposed between the end of the roller 35 and the arm 3| of the presser bar [9. Countersunk fiat head screws 56 secure the plate 55 and the disk 54 together, both being rotatably carried by the shaft 32.

The periphery of the disk 54 has a plurality of cuts 5'! providing wedging surfaces 58, and wedging rollers 59 are disposed in the cuts 51 for engagement with the said wedging surfaces and with the inner periphery of the roller 35., The rollers 59 are yieldably held in engagement with said surfaces by springs 69 carried in suitable recesses in the disk 54.

As shown in Fig. 6, wear-resistant. insets 6| may be provided in the wedging surfaces 58 where the latter are engaged by the rollers 59.

For driving the disk 54 without taking up needed space about the head I3 or under the overhanging arm 42, the plate 55 is extended rearwardly to form a lever arm 62 which is pivotally connected at its extremity to an upwardly extending link 63, Fig. 4, in turn connected to an arm 54 carried on a shaft 65.

As shown in Fig. l, the shaft 65 is carried in bearings 66 and 61 to extend along the lower rear of the overhanging arm l2 of the machine, so as to allow substantial clearance between the shaft and the base I9. At its other end the shaft 65 carries an'arm 68 connected by a link 69, Fig. 2, to an eccentric 10 carried by the upper shaft 16 of the machine. Y?

Referring to Fig. 3 the stroke of the eccentric is adjustable by turning an adjusting screw 1 I.

When the sewing machine is in operation, the eccentric 19 imparts a-reciprocating motion to thelink 69 and arm 68, which is in turn transmitted through the shaft 65 to the link 63 and arm 62. This causes the disk 54 of-the driving clutch 53 to oscillate, thereby intermittently driving or turning the feed roller 35 forwardly. During the reverse movements of the disk54, the roller 35 is prevented from reversing or following the disk due to the restraint provided by the clutch 42.

The amount of movement of the roller 35 may of course be regulated by adjusting the throw or stroke of the eccentric by thescrew ll.

Driving of the upper roller 35 causes the lower roller 35 to also rotate, even when work material is being fed between the two rollers, since the force of the spring 22 holds the rollers together and conforms the work to the cooperating ribbed or toothed surfaces of the same.

It will be seen, referring to Fig. 4, that the rollers 35 and 36 are located closely behind the presser footlfi and feed dogs H, as a result of which the amount or length of work material extending from the presser foot to the rollers is comparatively little. to have short lengths of stitching may be readily sewed with such an arrangement. Referring to Fig. 1, the space at either side of the rollers 35 and 35 is free and unobstructed, so that no impediment is offered work material, and so that an operators hands may follow and manipulate the material if necessary without interference.

The driving and controlling clutch mechanisms for the roller 35 is substantially wholly contained by the latter, being extremely compact and yet eifective for the purpose desired.

The rollers 35 and 36 may have surfaces other than the ribbed surfaces shown, tosuit different types of material and sewing requirements.

When the presser foot lever 26 is op to raise the roller 35, the latter does not turn since the relative movement of the arm 62 is in the reverse or return direction, and the roller is prevented from reverse movement by the clutch 42.

However, when the lever is dropped to lower the roller the latter is caused to turn a slight extent in a forward or feeding direction, tending to desirably make taut the work material extending from the presser foot 16 to the rollers.

Variations and modifications may be made within the scope of this invention and portions of the improvements may be used without others.

What is claimed is: I

1. In a puller feed for a sewing machine, a base having an opening therein; an overhanging arm spaced from the base; upper and lower feed rollers having ribs extending across the surface thereof, the lower roller having circumferential grooves therearound and being mounted on the base to project through the opening and the Thus garments which are upper roller beingcarried by the arm and movable into cooperative relation with the lower roller with the ribs of said rollers in meshed relation to grip material therebetween; means for driving said rollers to pull said material; and a plate having a portion extending into the grooves between the rollers for engaging the material and stripping the material from the lower roller and a curved portion extending rearwardly from the rollers and upwardly above the base for deflecting the material beyond the edge of said opening whereby said material is prevented from being drawn into said base through the opening.

In a puller feed for a sewing machine, a base having an opening therein; upper and lower feed rollers having ribs extending across the surface thereof, the lower roller being mounted on the base to project through the opening and the upper roller being mounted above the base and movable into cooperative relation with'the lower roller with the ribs of said rollers in meshed I relation to grip material therebetween; means REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Ringe Feb. 15, 1921 Neddersen Mar. 4, 1924 Christensen et al. June 17, 1930 Christensen et a1. Oct. 18, 1932 Kucera Apr. 16, 1940 Weiss Aug. 3, 1943 FOREIGN PATENTS Country Date Great Britain Feb. 2, 1886 Number Number

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