US444893A

US444893A - Trolley for electric railways

Info

Publication number: US444893A
Authority: US
Publication date: 1891-01-20
Anticipated expiration: 1908-01-20

Description

(No Model.)

111. HV. BLADES. TROLLEY POR ELECTRIC RAILWAYS.

Patented Jan. 20, 1891.

Cy/ISES d www@ f/ QM@ fm2 UNrTEn STATES PATENT OEEicE.

HARRY II. BLADES, OF DETROIT, MICHIGAN.

TRCLLEY FOR ELECTRIC RAILWAYS.

SPECIFICATION forming part of Letters Patent N o. 444,893, dated January 20, 1891. Application tiled August ll, 1890- Serial No. 361,676. (No model.)

To all whom it may concern:

Be it known that I, HARRY H. BLADES, a citizen of the United States, residing at Detroit, county of IVayne, State of Michigan, have invented a certain new and useful Improvement in Trolleys for Electric Railways; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention is designed to produce au overhead trolley for electric railways; and it consists in a combination of devices and appliances hereinafter described and claimed.

In the drawings, Figure l is an elevation of a trolley and its supporting mechanism. Fig. 2 is an elevation at right angles to Fig. l, with the trolley-rod bent over into its position when the trolley is on the wire.

In carrying out my invention, A represents a suitable base-plate adapted for attachmentto the top of the car. .B is the trolley-rod, and C the trolley journaled in the end thereof and adapted to bear on the wire. The rodB is engage to the plate by the ball-and-socket joint D, the socket d being formed on the base-plate while the end of the rod is provided with the ball or knob d. The edges d2 of the socket may, if desired, be brought in so as to retain the ball within the socket.

F is a yoke embracing the rod B, to the ends of which are engaged the springs G G. rlhis yoke is movable up and down on the rod B, and is held at the desired point by the nuts fj", the rod being screw-threaded to allow the nuts to be raised or lowered.

The lower ends of the springs G G rest on the plate A, the end of the coil being passed through the plate and securely fastened in any suitable manner. rlhese springs G G by their lateral resiliency thus tend to keep the rod in its upright or vertical position, iieXing laterally as the rod is thrown over, but exerting all of the time a lifting-strain on the outer end, and thus keeping the trolley always against the wire. Now when it is desired to increase this lifting-strain the nut f may be loosened and the nut f run up the desired distance, thus raising' the yoke and extending the springs. Thus to the lateral resiliency of the springsis added the increased tension due to the longitudinal extension of the springs out of their normal position.

Any desired pressure may thus be exerted to keep the trolley-Wheel adjacent to the wire, and this pressure can be varied at will.

What I claim is- 1. In an overhead trolley for electric railways, the combination, with the trolley-rod pivoted .at its base to the supporting-plate, ot' two coil-springs having their lower ends rigidly engaged to the said supporting-plate and their upper ends engaged to the rod above its pivoted end, substantially as described.

2. In an overhead trolley for electric railways, the combination, with the trolley-rod engaged at its base to the supporting-plate by a universal joint, of two coil-springs having their lower ends rigidly engaged to the` said supporting-plate and their upper ends engaged with the rod, substantially as described.

3. The combination, with the trolley-rod engaged to the supporting-plate by a ball-andsocket joint, of two coil-springs rigidly engaged at their lower ends to the said supporting-plate and having their upper ends engaged to a cross-arm or yoke on the rods, substantially as described.

4. The combination, with a trolley-rod having an armor-yoke embracing the same .and adjustable lengthwise of the rod, said rod engaged to its supporting-plate by a universal joint, of two coil-springs having their lower ends rigidly engaged to the supporting-plate and their upper ends engaged to the yoke, substantially as described.

5. rlhe combination, with a trolley-rod pivoted to its supporting-plate and having a cross-arm or yoke adjustable lengthwise of the rod, of two coil-springs having their lower ends rigidly engaged to the supporting-plate and their upper ends engaged to the yoke, substantially as described.

6. The combination, with a trolley-rod having its end engaged to the supporting-plate by a ball-and-socket joint, and having a crossarrn or yoke adjustable lengthwise of the rod, of two coil-springs rigidly engaged at their base to the supporting-plate and having their upper ends engaged to the yoke, substantially as described.

In testimony whereof I sign this specification in the presence of two Witnesses.

HARRY II. BLADES.

Witnesses:

W. H. CHAMBEELIN, ADoLrH WURZBURG.