US828717A - Automatic electromagnetic sanding-gear for use on electric railways and tramways, &c. - Google Patents

Description

PATBMED AUG. 14, 190e.

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CHARLES W. CROSBIE, OF SANDHILL ROARKEE, lNDlA. AND ARTHUR WARD, OF MACCLESFELD, ENGLAND,

ASSIGNORS TO MARK GUM MINS, F MANCHESTER, ENGLAND. AUTOMATlC ELECTROMAGNETlC SANDlNG-GAR FOR USE ON LECTRH; RMLWAYS AND TRAMWYS, Bic.

Patented Aug. 14, 1906.

Application {iled April 3| 1905. Serial No. 253,646.

To all whom, it may concern:

Be it known that-we, CHARLES WILSON Cnossrn, residing at Sandhill Roarkce, in the Northwest Provinces, India, and ARTHUR WARD, `residing at Springield, Beech Lane, Macclesfield, in the county of Chester, England, subjects of the King ol Great Britain and ireland, have invented new and useful automatic electromagnetic sanding-gear for use on electric railways and tramways operated instantaneously with the electric brake from the controller-handle, of which the following is a specification.

This invention relates to a combination with the sand-valves or sanding-gear as at present in use on electric tramways and rail- Ways of a magnetic device that may be either an electromagnet or other device that Will exercise a magnetic pull when energized by an electric current.

The object of the said invention is to automatically operate the sand-gear by utilizing the current generated by the rnotors when actin as generators to energize a solenoid or ot ier magnetic: device attached to the sand-gear when the Inotorinan in cases of emergency applies the magnetic, rheostatic, or other types of electric brakes, and thereby minimize the risk of accident by sanding the track instantaneously with the application of the electric or magnetic brakes if the motorrnan, owing to excitement or other causes, neglects to open the sand-valves in the ordinary manner 'by the application of the foot to the levers connected therewith.

ln the accompanying drawing one method of application of the said invention is illustrated as applied to a tram-car; but we do not confine ourselves to the precise method shown, as the connections and desi n of the magnetic device may be varied wit out departing from the nature of our invention.

o is the sand-box.

t is a lever on the rocking shaft, the valve or slide c being connected to one end of said lever and the opposite end of the lever b connested to the bell-crank lever d by the rod c.

f is the pin, which the motorrnan presses down with his foot when the rails require to he sanded on ordinary occasions.

According to and for the purpose of our invention We connect a solenoid or the armature of an electromagnet, such as g, to the lever t by ineens of a slotted link, as j, so as not to affect the ordinary action oi the sanding-gear. VWe connect the solenoid or other magnetic device to the motor and controller Wiring, so that the current of the motors when Working as generators will flow through its windings,l the pull of the device increasing in proportion to the current generated. Said solenoid or other electromagnetic device is supported in close proirirnittT to the valve or gear of the sanddioxes, and when the inagnet g is energized by the current from the motors acting as generators it draws or pulls the armature lc to said magnet g, which opens the valve a and allows the sand to fall from the sandboxes through the pipes to the track. One or more tension-springs, such as l, can be attached to the valves of the sand-boxes or the lever t, as shown, by which said valve is caused to close immediately the current is switched off by the controller-handle m being moved round to the off position or by the car coming to a stop, when current will not then be generated by the motors. By ineens of lthese tensionfsprings the pull of the device can also be re ulated, so that the valves will open at any esired amount of current before skidding would take place. A sand box or boxes, a controller, and a solenoid or other electromagnetic device in connection therewith are litted at each end oi" the car; but the solenoid or electromagnetic device is only actuated on the same end of the car as the controller operated, which would be the one on the end of the car that would be the iront end when runningr in regular service.

Bv these means the magnetic brake or the rheostatic brake (which is operating the motors as generators through rsistances) is able to produce not onlT a strong retarding eiect on the motor-armatures, and consequently to the car-wheels through gears, but also at the same time provides increased friction between the car-Wheels and the rails, tlnireoj,y minimizing or preventing slridding, thus bringing the car or vehicle to rest in the shortest possible distance. The combination of controllers used on electric cars for connecting motors in anch a wav as to propel the cars and by throwing the handle in the other direction, connecting them so that they become generators to retard the cars, is so IOC IOS

Well known that explanation is not consid ered necessary.

We claim as our invention- 1. Electromagnetic sanding-gear for use on electric railways, comprising a solenoid connected with the motor and controller Wiring, and means connected therewith for opening the sand-Valve When the motors are used as generators7 in combination with means for operating said sanding-gear independent oiI the solenoid,

2. Electromagnetic sanding-gear for use on electric railways, comprising a solenoid connected with the inotor and controller Wiring, means connected therewith for opening the sand-Valve When said inotors act as generators for applying the sand direct to the Wheels and rails, said valve adapted to be ke t open until the car stops.

n testi1nonT whereof We have signed our names to this speciiication in the presence of tWo subscribing Witnesses.

CHARLES NV. CRCSBIE. ARTHUR WARD. Witnesses to the signature of Charles Wilson Crosbie:

JN0. HUGHES, J. ERNEsT HUGHES. Witnesses to the signature of Arthur WARD:

JOHN BROWN, WILLIAM S. FRANCE.

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