Retractable pantograph for downward withdrawal in the event of a

Details Retractable pantograph for downward withdrawal in the event of a Retractable pantograph for downward withdrawal in the event of a

1981-06-10

1983-11-08

Schacher, Richard A.

Electricity: transmission to vehicles

Collectors

Trolley

191 88, B60L 512

Patent

active

044137109

ABSTRACT:
A movable structure for supporting a current-collector bow is pivotally mounted on a frame and lifted by means of a spring attached to the structure and to the frame. Upper members of the bow support structure permit displacement of the bow independently of the structure. Hook-engagement means or valve units are provided for neutralizing the lifting spring and transmission means are provided for connecting the bow-displacement means to the spring-neutralizing means. A load limiter inhibits the bow-displacement means below a predetermined load threshold value and releases the bow above this value.

REFERENCES:
patent: 2238418 (1941-04-01), Grant

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