US118650A - Improvement in motors for sewing-machines - Google Patents

Description

[97.] 2 Shees--Shee I.

DAVID H. SHRMAN.

,Improvement in Motor for Sewing Machines.

[97.1 2 shew-sheet 2. DAVD H. SHERMAN.

Improvement in Motor for Sewing Machines.

No. 118,650. Panama-Aug. 29, 1871.

bte.

PATENT @Enron DAVID H. SHERMAN, OF WAUKEGAN, ILLINOIS.

IMPROVEMENT IN MOTORS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 118,650, dated August 29, 1871.

To all whom it may concern:

Be it known that I, DAVID H. SHERMAN, of Vv'ankegan, in the county of Cook and State of Illinois, have invented a new and valuable Im provein ent in Sewing-Machine Motors; 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 drawing making a part of this specification, and to the letters and gures of reference marked thereon.

Figure l of the drawing is a representation of a side elevation of my invention. Fig. 2 is a vertical section of the same.

This invention has relation to sewing-machine motors; and consists in the construction and novel arrangement of devices, as hereinafter described, by means of which several sewing-inachines can be driven from a single driving-shaft and their speed easily regulated.

Referring to the drawing, A A' represent a pair of revolving cones journaled Within a strong frame, B, which is secured to and depends from the under side of the machine-table.` The shafts of said cones are horizontal and parallel with each other. Each shaft holds a belt-Wheel, C, from which motion is given to the sewing-machines by means of belts. The shaft of roller or cone A is furnished also with a belt-Wheel, C', by means of Which said cone receives motion iroin a main shaft and Wheel through the medium of a communicating-belt. Any number of cones may be driven from the cone A by means of friction-wheels.

In the drawing, D represents a friction-Wheel arranged to operate the roller A', said wheel being actuated byroller A. This Wheel is swiveled to a transverse shaft, E, and may be shifted along it, in the manner hereinafter described. rlhe shaft E is adapted to slide up and down upon vertical rods or standards F, in order to place the friction-roller in or out of contact with the concs. The ends of the shaft E rest on a pair of arms, G, Which diverges from the upper end of a lever-arm, H. A pedal, I, is attached to the lower end of arm H, and pivoted to the sides of a stirrup, J. By pressing down the pedal, the shaft E and friction-Wheel I) are raised to release the latter from the cones. A pair of spira-l springs, K, on the standards F serves to place the roller in contact with the cones when the foot is taken from the pedal.

L designates a lever having a forked end, L', which embraces the roller D. The shaft E passes through said forked end. This lever is pivoted to a stand, M, by means of a bent brace, N, and is designed for the purpose of shifting the position ofthe frictioirroller in order to regulate the speed of the cone A'. The lever is retained in any desirable position by means of a rack, 0, supported by the stand M, and is held in contact With said rack by a spiral spring, P, on the brace N.

The cone A may be the middle one of three, driving those on either side, While the latter may drive others, running, thereby, 'as many sewingmaohines as there are cones.

The friction-rollers should be made of or covered with India rubber, to increase their power.

I clailn as my invention- 1. For communicating motion to sewing-inachines, the driving-cone A, adjustable frictionroller D, and cones A', substantially as specied.

2. The combination, with the cones A A', of the friction-roller D, lever L, spring H, and rack O, substantially as specified.

3. The combination, with the cones A A', of the bar F, springs K, arm H, pedal I, and. adjustable roller D, substantially as specified.

Intestimony that I claim the above I have hereunto subscribed my name in the presence of two Witnesses. v

DAVID H. SHERMAN.

Witnesses:

HIEAM L. HUGUNIN, NATEAMEL SHERMAN.

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