US834336A - Automatic electric braking. - Google Patents

Description

No. 834,336. PATENTBD OCT. 30, I906.

, Y L. H. TIHULLEN. AUTOMATIC ELECTRIC BRAKING.

APPLICATION FILED DEO.22,1903.

2 SHEETS-S11E21 1.

I citizen of the United trio Braking,

- UNITED {STATE-S PATENT OFFICE.

LOUIS H. 'IHULLEN, OF EDGEWOOD. PENNSYLVANIA, ASSIGNOR TO" THE UNION SWITCH 85 SIGNAL 00., OF SWISSVALE. PENNSYLVANIA, A OOR 'PORATION OF PENNSYLVANI AUTOMATIC ELECTRIC BRAKING.

Specification of Letters Patent.

Patented Oct; 30, 1906.

Application filed December 22, 1903. Serial No. 186,184.

Be it known that I, Louis H. THULLEN, a

States, residing at Edgewood, in the county of Allegheny and State of Pennsylvania, have invented certain newand useful Improvements in Automatic Elecof which the following is a specification.

My invention relates to the braking of a car or cars on which an electric motor or motors are mounted, and particularly, to an automatic braking action of such a car or cars. I will describe a car equipped with an ap.

paratus embodying my invention and then point out the novel features thereof in claims.

In the accompanyingdrawings, Figure 1 is a view of a car equipped with an apparatus embodying my invention. F ig. 2 is a diagrammatic' view: showing. some circuits required for the apparatus of Fig. 1. a view illustrating a modification. a view showing aniodification of device. I 3; 1

Similar characters reference I designate corresiponding parts all of the figures.

A esignates an arbitrary representation ofa car, and A I of a motor, the armature of whic is suitably geared with an axleor aXlesof the car iii-or- Fig. 3 is Fig. 4 is a' setting der that the car may be propelled along a railroad-track.

A designates .'a suitable conductorv by means'of which electric current from a line conductor B is led to the current from the motor may be through the trackrails, a separate conductor, or

through the ground. The electric current tion 01' the controller B, but when operated,

as hereinafter explained, it will cut oil the current from the motor and close a circuit on the. motor to have it act as a dynamo, and the power re uired to o eratethe motor when run as a ynamo will put a braking ac tion on the car or train.

an j arbitrary re 'rc sentationa suitable form of con troller B, carried by the car. The return for This" The current gener ated by the motor when operated as a dyiiamo may be.

8. The two arms b b are so arranged that when i one arm I) is in engagement with its series of contacts the arm 6 is out of engagement with its s'eriesof contacts. The two arms may be alternately engaged by rockingthe lever on its pivot through the arm-b The-ordinary p0.-

.sition of the T-shaped lever is such that the arm 1). is in engagement with itsseries of contacts, so that when the controller B is operated current will flow through wire 9, contact'5, arm I), contact 6,: wires 10 and 11,

through armature of motor, wire 12, contact 8, arm 6, contact 7, through wiresl3 and 14, through the field of the motor to ground. l

The arm I) is provided with insulation, so that there will be no'short circuit of the current from contact 6 to contact 7 throu h the arm. The arm I) is insulation to prevent a short circuit through the arm from contact 2 to 3.

When the T- shaped lever is rocked to move the arm I) out of itsengagement with its series of contacts, current will be cut off from the motor, the arm I) is moved into engagement with its series of contacts toclose a circuit on the motor. of the armature is as. follows: wires 11 and 15, resistance A, wire 16, contact 1, arm I) contact 2, wires 17 and 14, through the field contact '4, arm 1), conof the motor, wire. 18,

and-

This circuit starting from one brush similarly provide with.

tact3, and wires 19 and 20, back to the armature. Shouldthere be any momentum of the car at the time of operating the T-shaped be made to act as a lever, the motor .woul generator, and the current a braking action on the armature, and hence the car. Prefierabl the resistance A will be cut outof the. closed generated will put circuit after a time, and

thisymay-be accomplished in any desired 10o may be a art of the switch 13*.

manner and by any desired means. In Fig. 3 I have shown a means whereby the resist- .ance A may be cut out of the closed circuit.

E designates a pivoted lever acting as a switch which is included in the circuit which is closed on the motor A and which when free to move gradually cuts out the resisttion or trip C, located near the railroadtrack. This rejection or trip may be moved into and out of any operative position by any desired means, and the means may be controlled in any desired manner. For example, the projection or trip (3 may be operatively connected with a signal mechanism. r In Fig. ,4 I have shown a modification in the means for operating the switch B In this form an electromagnet Y is substituted for the trip C. The current for the electro magnet may be controlled in any desired way. An armature Gis carried by a toggle arrangement of levers Z, one of which levers Instead of two arms l) but one arm need be used for this arrangement, as the series of contacts are op osite each other instead of being arrange as shown in Figs. 1 and 2.

Many changes may be made in the relative arrangement and the-construction of the p arts Without departing from the spirit of my invention.

What I claim as my invention is 1. In combination with a motor carried by a car, and having its armature geared with an axle of the car, a circuit including the an mature and field of the motor which is normally open, a switch for closing said circuit and means located along a railway-track for operating the switch to close said circuit.

2. In combination with a motor carried by a car, and having its armature geared with an axle of the car, a circuit including the armature and field of the motor, which is normally open, a switch for closing said circuit, and an automatically-operated means located along a railway-track, engaging said switch whereby'it is moved to close said circuit.

3. In combination with a motor carried b a car, and having'its armature geared with an axle of the car, a feed-circuit for the motor, a second circuit including the armature and field of the motor which is norm ally open, a doubleecting switch for said circuits, and means located along a railway-track for operating the switch.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LOUIS H. THULLEN.

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