US268763A

US268763A - woodwaed

Info

Publication number: US268763A
Authority: US
Publication date: 1882-12-05
Anticipated expiration: 1899-12-05

Description

(No Model.) 2 Sheets-Sheet 1.

T. 0'. WOODWARD SEWINGMAGHINE. 0- .7 3- Patented Dec. 5, 1882.

N. PETERS. Pholo-Uthognpllcr. wnhiiu to 'n c.

(No Model.) '2 Sheets-Sheet 2'. T. 0. WOODWARD.

SEWING MACHINE. No. 268,763. PatentedDec. 5. 1882.

Vivaldi/5%: I Ina @7120? UNITED STATES} PATENT OFFICE.

THOMAS C. WOODVVARD, OF NEW YORK, Y., ASSIGNOR TO ELIAS A.

\VILKINSON, TRUSTEE, OF NEWARK, NEW JERSEY.

a SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 268,763, dated December 5, 1882.

' Application filed September 8,1882. (No model.)

7 To all whom it may concern:

tturning it with the treadle or otherwise in an automatic manner.

In the form of construction shown the beltwheel or driving-wheel A has a continuous oblique belt groove or track, B, and a straight switch groove or track, 0, leading therefrom at D and terminating at E, the opposite part of the belt-wheel between these two points,

that would be embraced by a continuation of the switch-groove, being cut away, as shown, forming an offset, F.

To illustrate the operation of the belt-wheel, it is shown on a journal, G, connected by a belt, H, in the oblique belt-groove to a beltpulley, K, on ajournal, L, the journals being fastened in a support, M, having a belt-guard, N, with a belt-groove, O, opposite to the switchgroove. The belt-wheel is shown with the belt in position, and adapted to be turned by the crank P from right to left, in the direction indicated by the arrrow, to keep the belt on in the oblique belt-groove, and to turn backward or in the opposite direction, to run the belt into the switch-groove and otf. Then the belt is run off the switch-groove it has a slack, R, in the offset, and drops into the belt-groove in the belt-guard, which permits the continued backward motion of the belt-wheel. By having no belt-groove in the belt-guard the backward motion of the belt-wheel will be arrested by the clamping of the belt between the two. 'When the beltis off, by turning the belt-wheel in the forward direction the belt will take the switch-groove and run on, and when it is on, by turning the belt-wheel in the backward direction it will take the switch-groove and run off.

The belt-wheel is peculiarly adapted to sewing-machines, in which it is frequently necessary to slacken. the belt on the belt-pulley on the driving-shaft L, to turn the head of the machine sidewise, to fix or oil the under works. To accomplish this the belt can be run oh the driving-wheel and slackened by a backward motion of the treadle Y, and when the head of the machine is in position again the belt can be run on again by a forward motion of the treadle, thus avoiding the unpleasant operation of removing or replacing the belt by hand, or both, or of applying a belt-shifter by hand for the purpose.

The details of construction and operation may be varied within the scope of the improvements. For example, the belt-wheel or driving-wheel maybe made in skeleton form,with any kind of a belt-track and switch-track; the form and application of the belt-guard may be modified, and the belt-wheel may be used for other purposes than that referred to herein.

I claim as my invention 1. The combination, in sewing mechanism, of driving-wheel A,having belt-groove B and switch-groove G, belt-guard N, having 1 beltgroove 0, belt H, treadle Y, and driving-shaft L, having belt-pulley K, substantially as set forth.

2. The combination, in sewing mechanism, of a driving-wheel 'having an oblique beltgroove and a straight switch-groove therefrom, a belt-guard around the lower portion of the same, and having a belt-groove opposite the switch-groove, and a belt from the drivingwheel to a belt-pulley on the driving-shaft,

substantially as set forth.

3. Thecombination, in sewing mechanism, of a driving-wheel having a belt-track and a switch-track therefrom, a belt-guard to keep the belt in proper relation tothe tracks, and a belt-from the driving-wheel to a belt-pulley on the driving-shaft, substantially as set forth.

4. The combination, in a sewing-machine, of adriving-wheel having an oblique belt-track and a straight switch-track therefrom, and supporting and operating mechanism, substantially as set forth.

5. The combination, in a sewing-machine, of a driving-wheel having a belt-track and a switch-track therefrom, and supporting and operating mechanism, substantially as set forth.

6. The combination of a belt-wheel having an obliqnebelt-track and a straight switch track therefrom, with a belt-guard around the lower portion of the same, and having a beltgroove opposite the switch-track to keep the belt in proper relation to the beltwheel, a beltpulley, and supporting and operating mechanism, substantially as set forth.

7. The combination of a belt-wheel having a belt-track and a switch-trackrtherefrom, a belt-guard to keep the belt in proper relation to the track, and supporting and operating a mechanism, substantially as set forth.

' S. A driving-wheel having a continuous oblique belt-track and a segmental straight switch-track therefrom, substantially as set forth.

911A beltwheel having abelt-track and a switch-track from the belt=track, substantially as set forth.

10. A belt-wheel having a switch-track to throw a belt on when the wheel is turned in one direction, and to throw the belt off when the wheel is turned inthe opposite direction substantially as set forth.

11. A belt-wheel adapted to throwabelt on and retain it when the wheel is rotated in one direction, and to throw the belt 011' when the wheel is rotated in the opposite direction, substantially as set forth.

In witness whereof I hereunto subscribe my signature in presence of two witnesses.

THOMAS C. WOODWARD. Witnesses:

E. E. MASSON,. W. B. MASSON.