Lock for trolley connector

Details Lock for trolley connector Lock for trolley connector

1990-03-29

1992-03-17

Werner, Frank E.

Electricity: transmission to vehicles

Collectors

Trolley

191 1R, 439133, 439134, B60L 500, H01R 1344

Patent

active

050971034

ABSTRACT:
A locking apparatus for electrically isolating a trolley-type electrical connector on the end of a conduit on an electrical mining machine or the like, to prevent an electrical connection from being made with the connector. The locking apparatus comprises an open-ended sheath made from an electrically insulating material, slidably mounted on the end of the conduit, to slide between an extended position in which the sheath surrounds the connector, and a retracted position in which the connector projects through the open end of the sheath. The sheath has aligned openings on opposite sides thereof, adjacent the open end of the sheath. A locking member is adapted to extend through the aligned openings and substantially block the open end of the sheath. A retaining cord tethers the locking member to the sheath. A lock can be used to secure the locking member in its position blocking the open end of the sheath.

REFERENCES:
patent: 1824657 (1931-09-01), Coldwell
patent: 4653824 (1987-03-01), Jason et al.
patent: 4673230 (1987-06-01), Baumgart
patent: 4679873 (1987-07-01), Brackett, Jr.
patent: 4721475 (1988-01-01), Burke, Jr.
patent: 4750898 (1988-06-01), Soulard
patent: 4812131 (1989-03-01), Sieverman
patent: 4957445 (1990-09-01), Burke, Jr.

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