US567307A

US567307A - Electric-railway trolley

Info

Publication number: US567307A
Authority: US
Publication date: 1896-09-08
Anticipated expiration: 1913-09-08

Description

(No Model.)

R. N. DYER. ELECTRIC RAILWAY TROLLEY. No. 567,307. Patented Sept. 8, 1896.

UNITED STATES Pnrn wr OFFICE.

RICHARD N. DYER, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO THE GENERAL ELECTRIC COMPANY, OF NEW YORK.

ELECTRIC-RAILWAY TROLLEY.

SPECIFICATION forming part of 2 Letters Patent No. 567,307, dated. September 8, 1896.

Application filed April 30, 1896. Serial No. 5 89,640. (No model.)

To all whom it may concern.-

Be it known that I, RICHARD N. DYER, a citizen of the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented a certain new and useful Improvement in Electric-Railway Trolleys, (Case 13,) of which the following is a specification.

It is well known that in the practical working of electric-railway cars wherein the current is supplied by an under running trolley from an overhead working conductor a great range of adjustment of the trolleyis required, the overhead working conductor being at some points, as in passing under bridges, lowered close to the roof of the car and at other points being elevated to a height of ten feet or more above the car-roof. By reason of this great range of adjustment it becomes desirable to produce means for maintaining the upward pressure upon the trolley which will give a practically uniform pressure throughout the entire range of adjustment of the trolley, anend which has heretofore been imperfectly accomplished.

In carrying out my invention I produce the upward pressure upon the trolley by means of an electrodynamic motor whose torque or pull is uniform and independent of the adjustment of the trolley. This motor is preferably connected with the trolley by a speedreducing gearing of any suitable character, so as to enable a small motor to do the work. The initial upward movement of the trolley to secure a suflicient preliminary contact for setting the small motor into action may be secured in any suitable way, as by overbalancing the trolley by a weight, or otherwise. The trolley-raising motor is also preferably located in a circuit independent of the car motor or motors, so that its operation will not be affected by the operation and regulation of the car-motors.

In the accompanying drawings, Figure 1 is a view, principally in diagram, illustrating an arrangement embodying my invention; and Figs. 2 and 3 are views of other forms of gearing connecting the trolley-pole and lifting electric motor.

than the drum E, the two drums being connected by a cord 0, whereby the rotary effort exerted by the motor will be utilized to produce an upward pressure of the trolley.

The car-motors are located in the circuit 1 between the trolley and the car-wheels, while the trolley-lifting motor is located in another and independent circuit 2. The circuit 2 may include lamps or other resistance H, or the motor F may be wound for the entire pressure of the circuit. A weight at maybe used to overbalance the trolley-pole and produce the initial contact with the conductor A. The pulling-cord for the trolley-pole is shown at 6.

Instead of the speed-reducing gearing consisting of the drums and cord, a pinion and gear-wheel may be used for connecting the trolley and lifting-motor, as shown in Fig. 2, or, to bring the trolley-pole pivot and the shaft of the motor F in line, a form of gearing such as that shown in Fig. 3 may be employed.

It will be observed that the torque or pull of the trolley-lifting motor is the same throughout the entire range of movement of the trolley.

The invention of lifting the trolley by an electrically-operated device located in a circuit independent of that of the car-motors is not claimed herein, the same being reserved for a separate application. for patent, (Serial No. 589,630, filed April 30,1896.)

hat I claim is- 1. In electric railways, the combination with an upward-pressure trolley, of an electrodynamic motor connected with the trolley and V acting to lift the same with a torque or pull.

which is constant and uniform throughout the entire range of adjustment of the trolley, substantially as set forth.

2. In electric railways, the combination with an upward-pressure"trolley and the car motor or motors, of an electrodynamic motor a speed-reducing gearing connecting the 1110- connected With the trolley and acting to lift tor and trolley, substantially as set forth. 10

the same, said trolley-lifting motor being lo- This specification signed and witnessed this cated in a circuit independent of the car-mo- 25th day of April, 1896. 5 tors, substantially as set forth. RICHARD N. DYER.

3. In electric railways, the combination WVitnesses: With an upward-pressure trolley, of an elec- EUGENE OONRAN,

trodynamic motor for lifting the trolley and JOHN R. TAYLOR.