Road-rail shunt

Details Road-rail shunt Road-rail shunt

1990-10-22

1991-10-08

Spar, Robert J.

Railway switches and signals

Electric automatic highway signals, mine doors, and gates

Car-actuated controller

191 45R, 105 722, B61L 102, B60L 500

Patent

active

050547224

ABSTRACT:
A device that attaches to a pneumatic tired convertible rail highway vehicle for the purpose of shunting electrical current of railroad tracks so that the current will actuate signaling devices. The shunt mechanism is actuated by raising and lowering the guide. No other actuation is needed. The shunt mechanism is located between the road wheel and the rail wheel. A wire or carbon brush makes electrical contact and closely follows the guide wheel. The shunt mechanism is mounted on shafts allowing adjustment for the gauge of the track. A reinforcing bar prevents radial twisting of the carbon or wire brush. A spring provides a light constant tension against the carbon or wire brush to insure electrical contact.

REFERENCES:
patent: 1870811 (1932-08-01), Jones
patent: 2027684 (1936-01-01), Fageol
patent: 2655873 (1953-10-01), McDonald
patent: 2986102 (1961-05-01), Cox
patent: 3371623 (1968-03-01), Therrien
patent: 3387064 (1968-06-01), Joy et al,
patent: 3581671 (1971-06-01), Hart
patent: 4828452 (1989-05-01), Bolitho
patent: 4979392 (1990-12-01), Guinon

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