Trolley pole raising and lowering apparatus

Details Trolley pole raising and lowering apparatus Trolley pole raising and lowering apparatus

1985-10-30

1987-01-06

Reeves, Robert B.

Electricity: transmission to vehicles

Collectors

Trolley

191 87, B60L 512

Patent

active

046348174

ABSTRACT:
A trolley pole is supported on a vertical shaft so as to be rotatable from side to side while in its elevated, operating position. The shaft is supported on a support structure which is tiltably mounted on a base plate on a vehicle. The base plate can be tilted by extending the arm of a linear actuator. When the base plate is tilted, the pole is lowered and centered and a gravity operated latch structure comes into effect to maintain the pole centered whenever it is not in its operating position. A control circuit coupled to the actuator extends and retracts the actuator arm to pivot the support structure between an upright and a stowed position.

REFERENCES:
patent: 832544 (1906-10-01), French
patent: 1075349 (1913-10-01), Gay
patent: 1447217 (1923-03-01), Lincoln
patent: 1733073 (1929-10-01), Prelesnik
patent: 2117030 (1938-05-01), Larsson
patent: 3547237 (1970-12-01), Ives

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