US1008736A - Device for holding the material in embroidering-machines. - Google Patents

Description

, M. SOHOENFELD. I DEVICE FOR HOLDING THE MATERIAL IN EMBROIDERING'MA GHINES;

APPLICATION FILED FEB.9, 1911.

Patented Nov. 14,1911.

MORRIS SCHOENFELD, 0F RORSCHAGI-I, SWITZERLAND.

DEVICE FOR HOLDING THE MATERIAL IN EMBROIDERING-MACHINESt Application filed February 9, 1911.

Specification of Letters Patent.

Patented Nov. 14, 1911.

Serial No. 607,458.

To all whom it may concern:

Be it known that I, MORRIS SoHonNrnLD, a citizen of the United States, and a resident of Rorschach, in the Canton of St. Gall, Switzerland, have invented certain new and useful Improvements in Devices for Holding the Material in Embroidering-Machines, of which the following is a specification.

In embroidering machines of the large type wherein a movable tambour frame carries the fabric which is to be embroidered, it is common to employ at least two rows of sewing needles arranged in parallel rows and owing to the various mechanisms used on the machine it has been necessary to space the needle rows several feet apart. The tambour frame which is employed to hold the fabric stretched in a vertical plane before the needles and which moves the fabric to give the necessary positions for the stitching, is usually large enough to hold the fabric for both (or more) rows of needles. If only one pair of rollers, horizontally disposed, be mounted on the tambour frame, and the fabric for both (or more) rows of needles be stretched between the one pair of rollers, the fabric will not be stable enough and the needles will tend to press the fabric away, rather than pierce it, the borers will do the same, and in fact the fabric will not be rigid enough to give proper results. In most machines, in fact all the successful machines, two pairs of rollers have been arranged longitudinally upon the tambour frame. The fabric for the top row of needles has been arranged so as to reel from one to the other of the upper pair of rollers; while the fabric for the lower row of needles was arranged to reel from one to the other of the bottom pair of rollers. This reduced the size of the free fabric between any two of the rollers and therefore made the fabric more rigid. The diliiculty with this construction however, is, that where the rollers are made for machines up to ten yards in length the weight of the rollers is very great and introduces a difiicult problem into the machine, because the tambour frame being a movable part of the machine, moving for every stitch, the shocks thrown upon the supporting frame are very great. Furthermore, the rollers, of the two pairs, which come near the middle of the machine occupy space which could be advantageously used for other parts of the machine; or, if the rollers were not present, a better view of the embroidery elements could be had. On the other hand when rollers have been arranged in two pairs the amount of fabric which could be rolled upon them has been limited.

I have invented a simple arrangement which overcomes the objections to the above constructions, so that only one pair of rollers need be used and my fabric holding device is disposed between the rollers and holds the fabric taut, so that good work can be performed on the fabric, notwithstanding the expanse of material between the two rollers.

By the use of my invention much space is saved at a critical point, the fabric is held better even than when two pairs of rollers are used, and the single fabric can be used for two or more rows of needles. The placing of the fabric is made easier, the weight of two rollers may be eliminated, and because the rollers can be arranged where space is not so important more material may be rolled upon them. Furthermore, the invention makes it possible to place the rollers on the stationary embroidering machine frame, the tambour frame simply carrying the fabric holding means. This will lighten the tambour frame weight and the power necessary to operate it and will reduce the shocks on the machine to a minimum.

All the above objects are obtained by means of a very simple arrangement which 'is very easily operated, and in the description and drawings I have shown my invention in its best form, intending, however, to cover all structures coming within the spirit of my invention and the scope of my claims.

By pointing out the invention when employed to eliminate one set of rollers I do not wish to limit my invention to this as the same may be used, to at least some advangisage, even where two pairs of rollers are use In the drawings forming a part of this application, Figure 1 is a vertical section through a tambour frame of an embroidering machine, showing one embodiment of my invention, Fig. 2 is a partial elevation thereof, Fig. 3 is a vertical section through a part of the device, Fig. & is an elevation of the same, with parts in section, Fig. 5 is a plan view thereof, Fig. 6 is a cross section of a modified form of my invention,

and Fig.7 is a cross sectionshowing a different disposition of the fabric rollers, made possible under my invention.

The tambour frame 1, which may be of ordinary construction and which may be mounted and operated in the usual Way, I have shown as comprising horizontal and vertical members, and it carries in its upper part one of the material shafts 2, and in its lower, part the other material shaft 3, which are mounted in journals '2 and "3. The material shafts might also be journaled outside of the frame 1 as will appear.

To the middle of the frame members 1 is secured an angle iron '41, which lies close to the material '5, stretched between the.

rollers. On the horizontal arm 4 of the angle iron are 'placed'bars 6 and '7, whichextend from the ends-of the *frame 1 almost to 2b the center thereof. "The bars 6 and 7 are ad'justably secured to the angle iron by bolts '8, passing through slots in said bars.

material, pins 10 are mounted, which stand inclined to said bars in a horizontal direction, the pins of the bar 6 extending to-.

wardthe left while those of the bar 7 extend toward the right. parallel to the pins 10 so that, when the bars 6 and 7 are moved in the direction of the arrows 11, "they are moved in the direction of the pins 10, whereby the latter are moved into the plane-of the material and are caused 1 For moving the bars to pierce the same. '6 and 7, levers 12 arepivoted on the angle iron-hat 12 ,each ofthe upwardly projectin'g arms of which passes through a slot 13, formed in the angle iron 4 in the direction of its length, and a slot 14, formed in the bars 6 and 7, transversely to the direction of their length. To the downwardly projecting arm of each lever 12 is attached a rod 15, by means of which the bars can be moved. On the opposite side of the material 5 from the angle iron 4:, and close to it, is a "bar 16, likewise secured to the vertical "members of the frame 1. When; the material is placed so that the part of it to be embroidered lies between the'sha'fts 5 2 and 3, the bars'6 and'7 are moved'toward the material, bymeans of the rod 15, where by the 'pins'10 .pierce the material. The bar 2 16 prevents the surface of the material from being bent "Whenthe pins are inserted. The material is now held firmly and stiffly by the pins, so that the'sewing needles'can be ac- I curately introduced.

In the modification of Fig. 6, the pins 10 are mounted on a bar 17 secured to an eccentric 19 on a shaft 18. By turning the latterin one or the other direction, the pins are caused "to engage or disengage the material. 4

It is possible, by employing my invention, to relieve the tambour frame of the On "the side of the bars 6 and 7 toward the 'bour frame.

weight of the rollers and the fabric they carry, one example of which is clearly shown in Fig. 7. In this embodiment of my in- 20 and 22, preferably mounted on the stand ards 21, which form parts of the main or stationary frame of the "embroidering machine. Enough slack 23, is allowed in the fabric between the rollers 2 and 3 to allow *forthe movements of the tambour frame in relation to the rollers.

In this form the tambour-frame performs the same functions as in the first construction but my instance are supported upon journal brackets H vention permits the mounting of the fabric rollers on the stationary frame instead of the tambour frame. This is import-ant, be-

p cause the great weight of the rollers and The slots 9 are the inactive portions of the fabric is carried upon the stationary frame of the machine and do not have to be moved with the tambour frame. This lightens the construction of the tambour frame and reduces the great shocks of the machine caused by the tamto move only the sheet of fabric upon which the design is being worked. This also has The tambour frame then has the effect of reducing the necessary counterbalancing weights which counterbalance the tambour frame, 'so that there is this additional relief to the machine. Furthermore,

by reducing the weight of the tambour frame, the force, whether from 'a pantograph or jacquard, necessary to move the tambour frame,is materially less and I consider this embodiment of my invention a great advance in the art.

It will be apparent that changes may be made in the construction and arrangement of the parts without departing from the spirit of my invention.

Having described my invention, what I claim is; I

'1. An embroidering machine embodying a tambour frame, and rollers for the fab- 'ric, means on said tambour frame for holding the fabric Ltau't for embroidering, comprising bars, arranged to be movable transversely of the plane of the fabric and "away from each other, and .pins on said bars, ar-

ranged to pierce the fabric.

2. An embroidering machine embodying a tambour frame, and rollers forthe fabri'c, means on said tambour frame for holding the fabric taut for embroidering, "comprising bars, arranged to be movable transversely of the plane of the fabric and away from each other, and pins on said bars, arranged to pierce the fabric, and means on the side of the fabric opposite the pins, and near the latter, adapted to prevent the fabric from bending When said pins pierce the same.

3. An embroidering machine embodying a tambour frame, and rollers for the fabric, means on said tambour frame for holding the fabric taut for embroidering, comprising movable members, pins carried by said members, and arranged in a substantially horizontal plane, the pins of one movable member diverging as to those of the other, and means whereby said movable members may be moved in the direction of their pins, to cause the latter to pierce the fabric.

4. An embroidering machine embodying a tambour frame, and rollers for the fabric, means on said frame for holding the fabric taut for embroidering, comprising movable members, pins carried by said members, and arranged in a substantially horizontal plane, the pins of one movable member diverging as to those of the other, and means whereby said movable members may be moved in the direction of their pins, to cause the latter to pierce the fabric, and means on the opposite. side of the fabric from the pins to prevent the fabric from bending When pierced by the pins.

5. An embroidering machine embodying a tambour frame, fabric rollers, and means on the tambour frame for holding the fabric taut for embroidering, comprising lon gitudinally disposed bars having pins arranged in a substantially horizontal plane, the pins of one bar diverging as to those of the other, obliquely to the plane of the fabric, said bars having a slot arranged parallel With their respective pins, a support for the bars having means for engaging in said slot-s, and means for moving said bars, whereby they Will be directed by said slot and engaging member, to cause the pins to pierce the fabric, and means adapted to prevent the pins from bending the fabric.

6. An embroiderin machine embodying a stationary frame, fabric rollers mounted on the stationary frame, a movable tambour frame, and means near the top and bottom of the tambour frame for holding the material taut for embroidering, comprisingbars arranged substantially parallel With the fabric, pins on said bars, the pins of one bar diverging as to those of the other, and means for moving said bars in the direction of their pins, whereby said pins Will be caused to pierce the fabric. I

Signed in the city, county and State of New York, this 7th day of February, 1911.

MORRIS SGHOENFELD.

Witnesses:

EUGENE LOEB, FRED. L. REIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington. D. G.

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