US328536A

US328536A - tibbles

Info

Publication number: US328536A
Authority: US
Publication date: 1885-10-20
Anticipated expiration: 1902-10-20

Description

(ModeL) 2 Sheets-Sheet 1' G. E. TIBBLES. TAKE-UP MBG'HANIsM FOR SEWING MACHINES.

No. 328,536. Patented Oct. 20, 1885.

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(ModeL) 2 Sheets-Sheet 2.

0-. E, TIBBLES. TAKE-UP MECHANISM FOR SEWING MACHINES.

No. 328536 Patented o z qgssa.

UNITED STATES PATENT OFFICE.

CHARLES E. TIBBLES, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE TIBBLES MANUFACTURING COMPANY, OF SAME PLACE.

TAKE-UP MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 328,536, dated October 20, 1885.

Application filed March 5, 1885. Serial No. 157,786. (ModeL) To all whom it may concern/.-

Be it known that 1, CHARLES E. TIBBLES, of Chicago, in the county of Cook and State of Illinois, have invented certain Improvements in Take-Up Mechanisms for SewingMachines; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 is an elevation of the head of a sewing-machine with the face-plate removed,

showing the cam-arm to operate the take-up.

Fig. 2 is an inside view in elevation of the removed faceplate and take-up arm. Fig. 3 is an elevation of the head of the machine with the faceplate broken away and exposing the take-up lever and operating-arm. Fig. 4 is a vertical section on the line 3 y of Fig. 3. Fig. 5 is a horizontal section on the line ma; of Fig. 1. Fig. 6 is a horizontal section on the line 2 z of Fig. 1. Fig. 7 shows details of the camarm. Fig. 8 shows details of the take-up arm. Fig. 9 shows details of the crank-lever when made separate from the take-up arm.

My invention relates to mechanismsfor operating the take-up arm of sewing-machines, and has for its object to produce a cheap and durable means for imparting a. positive motion to the take up arm.

To this end my invention consists in a pivoted take-up arm in combination with a cam on the end of the needle-bar rock-shaft for operating the same.

In order that those skilled in the art may make and use my invention, I will proceed to describe the exact manner in which I have carried it out.

In the said drawings, H is the take-up lever, having on its end a crank-lever, H, and pivoted to the face-plate by a shouldered screw, Z, around which it freely vibrates. The end of the crank-lever H has in it a pin, Z, on which is an anti-friction roller, Z. The rockshaft I is provided with an arm, I, in which is cut a curved slot, m, of such a width as to fit roller Z. The curved or cam slot m is cut on a true curve drawn on a radius from the center of the rock-shaft for about two-thirds of its length, the other third turning abruptly away from the center. When the face-plate is fitted to the head of the machine, the roller Z enters the cam-slot m, and, as the rock-shaft vibrates arm E, the roller runs up and down the slot m and actuates the take-up arm or lever Hthrough the medium of crank-arm H. This construction of the slot causes the take-up lever to stand still an instant whileitis at its lowest point, before it starts upward, and while the shuttle passes through the loop.

Having thus described my invention,what I claim, and desire to secure by Letters Patent, 1s

The rock-shaft I, provided with arm L, in which is out a cam-slot, m, in combination with the take-up lever H, and an arm, H, to connect the take-up lever with arm L, substantially as specified.

CHARLES E. TIBBLES.

Witnesses:

F. A. ELLSWORTH, T. C. BREcH'r.