US799141A

US799141A - Treadle for sewing-machines.

Info

Publication number: US799141A
Application number: US22191104A
Authority: US
Inventors: Joseph C Brompton; Edward J Dowling
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-08-24
Filing date: 1904-08-24
Publication date: 1905-09-12
Anticipated expiration: 1922-09-12

Description

No. 799,141. PATBNTED SEPT. 12, 1905.

J. C. BRMPTON L E. J. DOWLI TREADLE FOR SEWING MACH APPL IIIIIIIIII Bi) 116.241, 1904.

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UNITED STATES PATENT OFFICE.

I JOSEPH C. BROMPTON AND EDVARD J. DOWLING, OF CHICAGO,

ILLINOIS.

TREADLE FOR SEWING-MACHINES.

Speccaton of Letters Patent.

Patented Sept. 12, 1905.

To @ZZ mitm it may concern:

Be it known that we, JOSEPH C. BRoMrTox an d EDWARD J. DowLING, citizens of th e United States, residing in Chicago, Illinois, have invented certain new and useful improvements in treadles for sewing-machines and like mechanism in which the treadle-action on the pitman and its crank is aided by a spring mechanism, substantially as herein set forth.

IVe attain said ends by means of the mechanism constructed and applied substantially as shown in the accompanying drawings, and in which- Figure 1 shows our said new and improved mechanism in plan view. Fig. 2 shows the treadle and its attached parts in end view. Fig. 3 shows the lower part of the clamp K in end view elevation. Fig. 4 shows the next or middle part ot' the clamp K in end View, and Fig. 5 shows the upper part of the clamp K in end elevation. Fig. 6 shows Fig. 3 in plan view. Fig. T shows Fig. 4 in plan View, and Fig. 8 shows Fig. 5 in plan view.

Like reference-letters denote like parts throughout.

The treadle-fulcrum Z is the rod which connects the lower ends of the legs of the sewingmachine. It is non-rotatable and on it vibrates the treadle E, connected and attached to the pitmanrod and its crank in the usual way. To the rod (I is secured a clamp K, composed of the lower member f, which embraces the lower halt' of the rod d, and embracing the upper half ot' the rod is the member g on which are grooves j, into which are laid the straight parts L of the wires which form the spring or springs a, c. Said parts a are held in the grooves j and held down to place by the covering-plate z, and on each end of the clamp K the wires a are turned into coils ,which approach axially, and when they meet said wires are twisted into a single element c, of which the longitudinal axis diverges toward the treadle from the direction of the parts a and is finally bent directly toward the treadle or parallel to the rod Z and its ends passed under the treadle in substantially the same form at both ends, with the exception that at the lower end or that nearest the operator the element c is somewhat shorter than that part at the other end of the clamp K. vWhen said ends are turned under the treadle at their proper places and set so as to be in constant contact with said treadle and are ot' suitable wire, the action of the sewing-machine is greatly eased and made pleasanter. The action of said opposed springs ends a c may also be regulated by loosening' the clamp K by the bolts fz' and turning the clamp to one side or the other on the rod Z until the desired condition of the counteracting ends is obtained.

IV hat we claim is- 1. The combination with a connecting-rod and a treadle, of a pair of clamps on said rod provided with transverse grooves, coiled wire springs at each side of the clamp connected by straight spring-connecting members, in

said grooves, said coiled members meeting, axially, and united into a single member, and connected to said treadle, and means to bind said clamps and wires to place.

Q. The combination with a connecting-rod and a treadle, of clamps on said rod provided with transverse grooves, coiled wire springs at each side oi' the clamp, 'connected by straight Vitnesses:

IVM. ZIMMERMAN,

J. F. PARKS.