Lock for trolley connector
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United States of America Patent
Stats
-
Mar 17, 1992
Grant Date -
N/A
app pub date -
Mar 29, 1990
filing date -
Mar 29, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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