US583880A - Rudolph m - Google Patents

Description

(No Model.)

R. M. HUNTER.

EL EOTRIO BRAKE.

Patented June 1,1897.

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UNITED STATES FFICE.

PATENT RUDOLPH M. HUNTER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE ELECTRIC CAR COMPANY OF AMERICA, OF SAME PLACE.

ELECTRIC BRAKE.

SPECIFICATION forming part of Letters Patent No. 583,880, dated June 1, 1897.

Original application filed July 14, 1885, Serial No. 171,625. Divided and this application filed October 1, 1891. $erial N0.

407,387. (No model.)

To all whom it may concern.-

Be it known that I. RUDOLPH M. HUNTER, of the city and county of Philadelphia and State of Pennsylvania, have invented an Improvement in Electric Railways, of which the following is a specification.

My invention has reference to electric railways; and it consists of certain improvements which are fully set forth in the following specification and shown in the accompanying drawings, which form a part thereof.

This application (Case No. 210) is a division of my application, Serial No. 171,625, filed. July 14., 1885, and has particular reference to im- I 5 provements for magnetizing the axles with especial reference to creating a braking effect.

In carrying out my invention I provide an electrically-propelled vehicle with an electric motor mechanically connected with one or both axles for rotating them. Carried by the frame of the vehicle and encircling one of the axles is a helix o1 solenoid, which is arranged in circuit with the main-line conductors extending along the railway leading from a 2 5 source of electric supply. Arranged within the helix or solenoid and surrounding the axle is a core of iron, which may be made movable and adapted to be moved in one direction by the action of the helix and in the other direction by means of a spring. This core may be connected with the axle by means of a feather or spline, which will permit longitudinal movement. The frame of the helix or solenoid may be provided with a conical 3 5 aperture, and the core may be provided with a conical end adapted to fit the conical aperture, so that when the core is drawn into the helix or solenoid it-may create a braking effect.

Referring to the drawings, Figure 1 is a diagram illustrating the circuits of an electric railway and car embodying my invention.

Fig. 2 is a sectional elevation on line w w of an electrically-propelled vehicle embodying my invention, and Fig. 3 is a plan view'of the 5 running-gear of said vehicle with the helix in section.

A is the railway.

D and C are two working conductors extending along the railway and leading from a source of electrical energy B.

H is an electrically-propelled vehicle and is provided with an electric motor P, which may be of any desired construction. This motor is connected with the car-axles T through worm P, worm-wheel P shaft P and bevel-gears Q. The frame H of the vehicle is supported upon and moved by the axles.

K is a current-collector having contacts L for making electrical connection with the conductors C and D and from which contacts the motor-circuits W W emanate. The collector K is carried by a longitudinal frame M, hung from the vehicle-frame H by means of links N.

S is an electric-brake apparatus and consists of the solenoid or helix S held stationary and concentric with the axle T. The helix or solenoid S is supported by the frame H and is carried by the vehicle so that it cannot ro- 7o tate. S is a core connected with the axle T by a feather or spline, so that it rotates with the axle, but is free to slide longitudinally thereon. The core is provided with a conical end S, which is adapted to fit into a conical socket or recess formed upon the frame or case of the solenoid or helix. When the solenoid is energized, the core is drawn in, compressing a spring 8, and thereby creating a friction sufficient to stop the rotation of the motor. By this means the axle is prevented from rotating when desired, and at the same time it will be seen that the contact between the wheel and rail is brought to amagnetic condition, which will prevent sliding when frequently induced by the momentum of the car which is being suddenly stopped. The motor P receives current from the motor-circuit WV W through a switch U. This switch is provided with the lever U, having con- 0 tacts u u, and said lever is connected with the positive conductor to the motor-circuit. As the switch-lever passes around in one direction the contacts to close the circuit through the plugs V V V putting the arma- 5 ture of the motor in multiple or series with the field-magnets, and when turned in the other direction it cuts out the motor and throws the current through the solenoid or helix S of the electric brake.

1. An electric brake S consisting of the combination of the axle '1, the longitudinal sliding core S encircling the axle and having conical friction-heads S, and a solenoid or helix S having a stationary frame with a conical socket adapted to receive the conical head of the core.

2. An electric brake S consisting of the combination of the axle T, the longitudinal sliding core S encircling the axle and having conical friction-head S, a spring acting to press the core in one direction to remove the braking action, and a solenoid or helix S having a stationary frame with a conical socket formed to receive the conical head of the core.

3. In an electrical]y-propelled vehicle, the combination of the axles of a vehicle, an electric motor mechanically connected with the aXle to rotate it, a helix or solenoid sur rounding one of the axles, means for inde pendently energizing the motor and helix, a frame carried upon the axle and to which the helix and motor are firmly secured, and a movable core surrounding the axle and within the solenoid or helix for creating a friction between the frame of the helix or solenoid and said core when the latter is magnetized.

In testimony of which invention I have hereunto set my hand.

R. M. HUNTER.

Vitnesses:

ERNEST HOWARD HUNTER, S. T. YERKES.

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