US244102A - Feank willhelm - Google Patents

Description

(No Model.)

F. WILLHELM SEWING MACHINE.-

Patented July 12,1881.

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FRANK WILLHELM, OF DAYTON, OHIO, ASSIGNOR OF ONE-HALF TO LEVI SPIELMAN, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming partof Letters Patent No. 244,102, dated July 12, 1881.

Application filed January 8, 1881. (No model.)

To all whom it may concern:

Be it known that I, FRANK WILLHELM, of Dayton, in the county of Montgomery and State of Ohio, have invented a new and useful Improvement in Sewing-Machines, of which the following is a specification.

My invention relates to a device by which the presser-foot is given a reciprocating movement, the motion being transmitted from a pin attached to the crank-plate engaging an angular lever with adjustment attachment secured to the arm-head, as will more clearly hereinafter appear. I attain the object by the mechanism' illustrated in the accompanying drawings, in which- Figure I is a front elevation of the armhead. Fig. II is a side view of the operating mechansim. Fig. III is a rear view of the head-plate.

A represents the arm-head of theVhite sewing-machine, and B the head-plate.

The device is adapted to many sewing-machines in which a cam is attached to the needle-bar to give the requisite movement.

O is the shaft, which has bearings in the arm of the machine; J, the crank-disk, which carries the roller K, which operates the cam of the needle-bar.

The parts thus far described are common to sewing-machines of this class.

The pin O (see Fig. Il and dotted lines at Fig. I) projects to the rear from the crank-disk. Its travel is indicated by the circular dotted line at Fig. I, showing the engagement with the adjusting-arm H, exhibited in front and side views in Figs. I and II.

The angular lever I and the adj listing-arm H are pivoted on a common screw attached to the head. Theadjusting-screw enters the vertical portion of the lever, and its end rests against the adjusting-arm. As this arm is carried inward by the screw the upward movement ofthe presser-foot is increased, and the reverse movement decreases said movement.

D is the needle-bar, and E the presser-bar. To the latter is attached the ordinary guide G, which moves within a slot in the head-plate, and at the top ot' which is a rear projection, O2, which is engaged by the lever I, and thus areciprocating movementis given to the presser-foot. The pin O is so attached to the crankdisk as to raise the presser-foot slightly from the cloth after the loop is taken, but before the needle is raised out of the cloth; and the device thus operatin g is very useful in sewing on braid, it being done smoothly, with a uniform stitch in sewing on, at an angle or short curve.

The operation is sufficiently apparent from the description already given. The pin engaging the lever at each rotation communicates a reciprocating movement to the presser-foot.

I am aware that a cam at the end ofthe shaft has been used in connection with an angular lever to produce a reciprocating motion to a presser-foot of a sewing-machine, and I therefore only claim the device as set forth in my specification.

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

The pin O, the crank-disk J, the arm H, with the adjusting-screw F, and the angular lever I, in combination with the presser-bar E of a sewing-machine, substantially as shown and set forth. l

FRANK WILLHELM.

Witnesses:

JOHN ZANITCH, W. H. GLUEK.

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