US25782A - Improvement in sewing-machines - Google Patents

Description

F. G. vWO'OD'WARD.

Sewing Mchine. No. 25,782. l Patented Oct. 11,v 1859.

UNITED STATES FRANCIS G. VOODVARD, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 25,782, dated October l1, 1859.

' To all whom t may concern,.-

Be it known that I, FEANcIs G. WooDWARD, of Worcester city and county, and State of Massachusetts, have invented a new and useful Improvement in Sewing-Machines; and I do hereby declare.- that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specication.

Figure l is a perspective view; and Fig. 3 is a plan view, from below, of that part of the machine that contains my improvement.

A represents the plate that sustains the material to be stitched; B, the needle and apart of its carrier 5 C, the lower thread-case holder.A

This thread-case consists of a thin metallic bobbin, a, within a concave shell, b, Fig. 2. This shell has a iixed central stud upon which the bobbin a turns freely. This thread-case is held loosely to the face of the holder C by the cap G. D, Fig. l, represents an arm that carries a hook, d, on one end. The other end enters (and works easily in) a hole near the edge of the wheel F. At a certainposition between its ends this arm works in a universal joint, E, or otherwise a double joint that permits the ends of the arm to` vibrate laterally in every direction, but does not admit of any longitudinal motion of the arm, neither does it admit-of a rotation on its axis. It admits simply of a circular vibration ofthe hook d around the threadf case in G.

It operates as follows: The rotation of thev wheel F causes the hook d to play around the edge ot the thread-case, and in its Inotion it catches a loop of the needle-thread and draws it over the thread-case in G, or at least it draws the loop so far over the case as to insure its being drawn entirely over and closely to the work by the extension of thcnext loop, thus interlocking the two threads, as in the shuttle-machine.

T-he novelty of this invention consists in the manner of working the looping-hook d by means of the wheel F and the double joint E. The obj ect of this arrangement was to do away with the break or rubber that is required in the Wheeler 8U Wilson machine; and, secondly, it was deemed to .be the most simple and durable of any arrangementheretoforeknown to effect the same object, except the Vheeler & Wilson invention. Unlike the S. C. Blod- 'gett invention, (patent issued during the week ending September 7, 1858, assigned to G. B. Sloat 8U Co., of Philadelphia,) it has no co1n pound motion, and the arrangement is much more simple and durable.

I do not claim working a hook around a The peculiar manner of working the loop- I ing-hoop d by means of the wheel F and the double joint E, substantially as specified.

FRANCIS G. VOODVARD.

Witnesses:

HENRY HAMMOND, DAVID MCFARLAND, J1'.

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