US1346988A

US1346988A - Work holder and guide for sewing-machines

Info

Publication number: US1346988A
Application number: US218684A
Authority: US
Inventors: Stein Abraham
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-02-23
Filing date: 1918-02-23
Publication date: 1920-07-20
Anticipated expiration: 1937-07-20

Description

A. STEIN. HOLDER AND GUIDE FOR SEWING MACHINES.

APPLICATION FILED FEB. 23. I9 I 8.

Patented July 20, 1920.

| E.' 4 I I Z5" qm; l 20/ i 43T 43 F5523 lowing specilication and UNITED STATES ABRAHAM STEIN, OF BOSTON, MASSACHUSETTS.

WORK HOLDER ANI) GUIDE FOR SEWING-MACHINES.

speemcation of Letters Patent.

Patented July 20, 1920.

Application filed February 23, 1918. Serial No. 218,684.

To all whom t may concern:

Be it known that I, ABRAHAM STEIN, a citizen of Russia, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Work Holders and Guides for Sewing-Machines, of which the following is:- a specification.

l fIhis invention relates to work holding and guiding means for sewing machines.

The object of the invention is to provide a simple, inexpensive device for holding and guiding the work while it is being stitched in the sewin machine so as to accurately locate the stitcIies at any desired distance from the edge of the work, thereby eliminating waste, due toV inaccuracies and to the inexperience'ofoperators, which so often results when the work is manually guided through the machine.

Another object of the invention is to provide means "for automatically stopping the machine when the work is completed.

The invention consists in the combination and arrangement of parts set forth in the folparticularly pointed out in the claims.

Referring to the drawings:

Figure 1 is a plan view of portions of a sewingmachine with a work holder embodying my invention shown in connection therewith.

Fig. 2 is a detail section taken on the line 2--2 of Fig. 1.

F igl 3 is a detail plan View of a modified form of holder.

. Fig. 4.is a detail section taken on the line 4-4 of Fig. 3.

Like numerals refer to like parts throug out the several views of the drawings.

In the drawings, 1 isa table of any con- Venient design upon which rests a sewing machine 2 having the usual driving wheel 3 provided with a grooved pulley 4, through which power may be received from any suitable source. In the present instance, however, a motor 5 is preferably employed which is connected by a belt 6 with the grooved pulley 4.

The base or work support 7 of the sewing machine is preferably grooved transversely thereof at 8, which groove is in close proximity to and parallel with the direction of movement of the `work feeding device 9 of the machine, said work feeding device being of the usual well known form employed in substantially all types of sewing machines.

Thls work feeding device coperates with a presser foot 10 adjustably mounted to move toward and away from the work support 7 to clamp or release the work in the usual well known manner. Arranged with- 1n the groove 8 is a slide 11, the opposite edges thereof being dovetailed to correspond with the opposite sides of the groove 8 which are also dovetailed, thus retaining said slide within the groove.

The slide 11 is preferably made long enough to receive the entire length ofthe work whoser edges are'to be stitched and this often necessitates the use of a slide of considerable length, therefore it is necessary t.) provide additional supports upon opposite sides of the work support 7 consisting of

plates

12 and 13 which may be supported in any suitable manner, vand these plates are preferably grooved to correspond with -the groove 8 of said work support, thus providing a support for said slide substantially the greater portion of the length of said slide.

The purpose of the slide 11 being movable with the work feeding device 9 is to hold the work with the edges of the two parts thereof, which are to be stitched together, parallel with the direction of movement of the work feeding means and thereby eliminate the necessity of guiding the work by hand during the stitching thereof.

To accomplish the holding of the work on said slide, a clamping device isprovided which preferably includes a plate 14 which extends nearly the length of the slide 11, an'd this plate -is arranged adjacent to the edge of the slide nearest to 'the feeding \means 9. This plate 14 is preferably mounted upon

arms

15 and 16 disposed adjacent to opposite sides of the slide 11 by means of a rod 17 which extends from the arm 15 to the arm 16 throughy ears 18, preferably surmounting the plate 1 4.

The arms 15 and 1 6 are pivotally connecti ed to

lugs

19 and 20 on said slide by pins 21, permitting said clamp plate 14 to move from its position against the work, as shown at 22, Fig. 2, upwardly into the position enable the operator to insert the work and properly position the same with respect to an adjustable gage 23 at the rear of the presser foot. Y

The plate 14 is preferably arched so as to engage the work only at its opposite edges and by pivoting said plate it will adjust itself to various thicknesses of work, operat ing equally as well upon thick or thin material. It is desirable that a yielding pressure be exerted by said plate on the work when the same is'clamped in place and to accomplish this'result springs 24 and 25 are secured respectively to the

lugs

19 and 20, and these springs are adapted to engage their respective levers at points 26 which are upon the opposite'sides of the pivots of said levers from said clamping plates and by exerting an upward pressure to said levers at their points the opposite ends of said levers which bear said plate will be forced downwardly toward the work.

When the clamp plate is swung upwardly into its upright position, Fig. 2, the springs 24 and 25 engage the squared ends 2'] of said levers and yieldingly maintain said levers in their upright positions. To assist in advancing the slide 11 to engage the work, a strip of relatively inelastic material 28 is secured to the under side of the plate 14 or preferably to the work contacting edges of said plate, and projects beyond the edge of said plate and the corresponding edge of said slide 11 adjacent to the work feeding means 9 and this strip is adapted to extend beneath one portion 29 of the presser foot, permit? ting said strip to extend substantially to the needle 30 of the machine, but not far enough to be pierced by said needle during the operation of the machine.

This provides just enough of the inelastic material to be inserted beneath one side of the presser foot in order that it may be fed through the medium of the work by one side of the feeding means 9, which is split, as also is the presser foot, to permit the needle 30 to pass therebetween and by placing this material 28 above the work it will prevent the work from being wrinkled or drawn during the feeding thereof, due to the dragging of the slide 11.

In addition to the plate 14, a series of spurs or needle points 44, 44 are arranged along the work engaging face of said holder slide between the portions thereof which are engaged by the edges of said clamp plate 14 so that the work which is laid upon said holder slide will be forced downwardly against the face thereof by said plate 14 or by the inelastic material 28 which stretches from one edge of said plate to the other and thus cause said points to pierce said work.

To still further assist in the movement of the slide 11 during the feeding of the work.,

a weight 31 is preferably attached by a suitable cord or chain 32 to the forward end of the slide, and this cord preferably extends over a pulley 33 to said weight 31, which is placed beneath the table 1 Another advantage of this method of stitching over the hand feeding method is that the machine may be run at a very rapid uniform rate of speed and the stopping and starting thereof, so essential to the operation of the machine when the work is fed thereto, will be dispensed with, thus greatly reducing the wear and tear upon the machine and also result in a great saving of time. rl`his is possible for the reason that the operator having once clamped the work in the machine need have no further thought of the same until the work has passed entirely therethrough.

To further facilitate the operation means 'are provided for automatically stopping the machine when the slide holding the work has reached the end of its throw, or, in other words, when the stitching of the work has been completed. rlhis result is attained by providing a switch 34 which has connected thereto wires 35 and 36, through which an electric current is supplied to the motor 5 from any desired source, not shown in the drawings.

rlhe switch 344 is also preferably operable from thefront of the machine by -means of a rod 37, whereby the switch may be manually closed when it is desired to start the machine into operation and when the slide 11V reaches the end of its throw the forward end thereof strikes said switch and opens Athe electric circuit, including the wires 35 and 36 of the motor 5.

rlhe device shown in Figs. 1 and 2 is adapted to the stitching of the edges of the layers of material together which are placed face to face and both clamped by the clamp plate 14 against the slide 11.

ln Figs. 3 and 4 a different type of slide is employed which is for the purpose of stitching together two overlapping pieces of material, thus requiring means on each side of the needle, presser foot and feedingA means for holding the work. This device embodies a double slide 3'8 which is wide enough to support two

clamping plates

14 and 14 substantially identical to the clamping plate 14 shown in Figs. 1 and 2, the clamping plate 14 being on the opposite side of the presser foot 10 and the work feeding means 9 and in order to support said clamping plates prop- Y plate together, are recessed at 43 so as to clear the feed member 9 slide longitudinally.

`Having thus specifically described my invention what I claim and desire by Letters Patent to secure is:

l. A sewing machine having, in combination, a work support having a groove formed transversely thereof, work feeding means adjacent to said groove, a slide mounted in said groove, adapted to be moved longitudinally thereof by said work feeding means, and a clamp member mounted `upon said slide adapted to engage the edge of the work bleiig stitched and hold said work on said s 1 e.

2. A sewing machine having, in combination, a slidable work holder adapted to secure the work at a predetermined distance from the edge thereof, work feeding means adapted to simultaneously move said work and said work holder, and means for autowhen moving said matically stopping said machine when said work ,holder has reached a predetermined position.

l3. A sewing machine having, in combination, a work said work su port having a groove formed transversely t ereof adjacent to and parallel with the direction of movement of said work feeding means, a slide arranged in said groove, means for securing the work to said slide with a predetermined portion thereof projecting beyond said slide and adapted to be engaged by said work feeding means, and

means on said work securing means adapted to be moved through the medium of the work by said work feeding means to impart movement to said slide.

4. A sewing machine having, in combination, a work support, work feeding means forsaid machine, a slide arranged on said .workv support adapted to move parallel with the direction of movement of said work feeding means, a clamp plate on said slide adapted to engage and hold the work at a predetermined distance from the edge thereof, and a strip of flexible but relatively inelastic fabric secured to the edge of said clamp plate, adapted to be moved through the medium of the work by said work feeding means to feed said slide with said work.

'ing means,

support, work feeding means work support adapted to move parallel with the directlon of movement of said work feeda clamp plate arranged on said slide parallel with the direction of movement of said work feeding means adapted to enga e and hold the work at a predetermine distance from the edge thereof, a strip of relatively inelastic fabric secured to the edge of said clampplate, adapted to be moved through the medium of the work by said work feeding 'means to feed said slide with said work, and a weight attached to said slide, adapted to assist said work feeding means in the operation of said slide.

6. A sewing machine having, in-combination, work feeding means, a slidable work holder, a series of spurs on said holder, and an arched plate adapted to engage the work on said holder on opposite sides of said spurs to clamp said work on said holder.

sewing machine having, in combination, work feeding means, a slidable work holder, meansv on said holder adapted to pierce the work on said holder and position the same thereon, means for clamping the work on said holder and ingly holding said work clamping means either in its open or clamping position.

8. A sewing machine having, in combination, work feeding means, a slidable work holder, a series of spurs on said holder, an arched plate adapted to engage the work at opposite sides of said spurs and maintain said work in engagement with said spurs, pivoted members on said holder and connected with said plate adapted to allow said plate to be moved relatively to said holder from its open to a clamped position relatively to said holder and springs constructed and arranged to engage said arms nesses.

ABRAHAM STEIN.

plate in its clamped or Witnesses:

CHARLES S. GooDING, SYDNEY E. TAFT.

means for yieldf