US721076A - Looper mechanism for sewing-machines. - Google Patents

Description

PATBNTED FEB. 17, 1903.

. 'L, ONDERDONK. LOOPERMEOHANISM FOR SEWING MACHINES.

APPLIOAT ION PILED JAN. 6, 1897.

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50 B represents a feed rocking shaft, and b the UNITE STATES PATENT OFFICE.

LANSING ONDERDONK, OF WINTHROP, MASSACHUSETTS, ASSIGNOR TO THE UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS.

LOOPER MECHANISM FOR SEWING-MACHINES.

SPECIFIQATION forming part of Letters Patent No. 721,076, dated February 1'7, 1903.

Application filed January 6, 1897.

To all whom it may concern.-

Be it known that I, LANSING ONDERDONK, a

citizen of the United States, residing at Win- I throp, in the county of Sufiolk, State of Mas- 5 sachusetts, have invented certain new and.

useful Improvements in Looper Mechanism for Sewing-Machines,, of which the following is a description, reference being had to the accompanying drawingsand to the letters and I figures of reference marked thereon.

My invention relates to an improvement in double-chain-stitch sewing-machines, and particularlytoanarrangementforsupportingand operating the under-thread-carryin glooper of r such machines, the object of the invention being to provide a machine having such a construction and arrangement of loopers and needles and mechanism for operating the loopers that the latter may be moved forward and back to take and leave the loop in a simple curved line, dispensing with two of the usual four motions of the looper-namely, the sidewise, or needle-avoiding movementsthe loopers in both their forward and backward movements passing on the front side of the needles. Furthermore, the use of loopjspreaders for either the needle-loop or l o oper-loo'p isn ot,nec-.

essary in the present construction. 7

The invention consists in the various matters hereinafter described, and referred to in' the appended claims. p In the accompanying drawings, which illustrate the invention, Figure l is a top. plan view of so much of a sewing-machine as is 3 5 necessary to a complete understanding of my invention, which is shown as applied thereto; and Fig. 2 is a sidelelevation of the same.

In the drawings, -A'repres ents the bed of the machine, and a, a a and a -the bear- 4o ing-lugs and supports, to which the cloth-plate H is attached by means of screws in the usual manner.

J represents the needle-bar of usual construction and operated in any well-known manner, beingherein shown as provided with two eye-pointed thread carryin g needles 1, arranged at points diagonal to each other respecting the line of the feed, which is in the direction of the arrow shown in Fig. l.

outer end a head 7, having sockets in which suitable manner.

Serial No. 618,154. (N6 model.)

and shaftbeing operated in any suitable and well-known manner from the driving-shaft. The driving-shaft is shown at E and on its end hasa' head D, forming a crank in which is secured a screw-stud 01, having on its end a ball 6.

C represents an armor link having end heads 2 and 3, the head2 having a socket in. which the ball 6 fits, having a free movement therein, and the head 3 having a socket in which the ball 4 on the stud 5 fits, this ballstud5 beingsecured to an arm F by being screwed therein, a check-nut 0 being also provided. This arm F, which I call the loopercarrier connection-arm, is attached to or integral with the looper-carrier, herein shown as a sleeve C embracing and turning on a screw stud or post C secured in the lug a on the bed of the machine. Attached to or integral with the sleeve C and projecting therefrom is the curved arm G, which has at its are set the shanks of the loopers 8, the loopers being secured in the sockets by the setoscillates the loopers will properly take and vrecede from the loops.

While the looper-carrier as a whole is herein shown as comprising the pivoted sleeve C the arm G, and the connection rod or arm F, I do not wish to be limited to this precise construction in all my claims; but it will be ob,- vious that the sleeve maybe dispensed with and thearm; Gr be arranged to oscillate in any So when in the claims I use the term looper-carrier or looper-carrying frame I mean thereby a generic term covering an oscillating supporting device for the loopers. Furthermor'e,.l donot wish to be limited to the exact number of loopers and needles herein shown, as more orless may be provided at will, and theneedles may be arranged abreast instead 'of diagonally to each other respecting the line of feed. In the construction herein shown the needles are set with their eyes at right angles to the line of mo feed and the looper is grooved for the reception of its thread on the outside and is threaded from the outside to the inside, which is the side toward the needle, or on the inside of the curve of the looper. The stitch feeds off the points of the loopers in the direction of the arrow. In Fig. 1 the manner of forming the stitch is shown.

Various modifications and changes in the construction of the device may be made without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patcut, is-

1. In a sewing-machine having a feeding mechanism movingin a defined path,a threadcarrying needle havingits eye arranged transversely to the line of feed, and a thread-carrying looper, with means for imparting to it positive reciprocation in a single horizontal plane, and in a curved path substantially tangential with the line of feed from a point in front to a point in rear of the needle, whereby the stitch is fed oif the point of the looper; substantially as described.

2. In a sewing-machine having a feeding mechanism movinginadefined path,a threadcarrying needle havingits eye arranged transversely to the line of feed, and a thread-carrying looper grooved upon its outer side for the reception of its thread, with means for imparting to it positive reciprocation in a single horizontal plane from a point in front to a point in rear of the needle, and in a curved path, substantially tangential with the line of feed, whereby the stitch is fed off the point of the looper; substantially as described.

In testimony whereof I aftix my signature in presence of two witnesses.

LANSING ONDERDONK.

\Vitnesses:

CHAS. L. STURTEVANT, F. S. FAVVCETT.

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