Torque limited drawout mechanism for circuit device

Details Torque limited drawout mechanism for circuit device Torque limited drawout mechanism for circuit device

1991-02-25

1992-06-09

Broome, Harold

Electricity: circuit makers and breakers

Interlocking

Between plural switches

361391, 464 37, H01H 920, H01H 3346

Patent

active

051209136

ABSTRACT:
A circuit breaker drawout arrangement includes a drive mechanism for moving a circuit breaker along a pair of rails between a Connect and a Disconnect position by means of a drive tool. A torque limited clutch permits a lower maximum torque when moving the breaker to the Connect position and a greater maximum torque when moving from the Connect position to the Disconnect position. In one embodiment the clutch is formed by a pair of oppositely orientated unidirectional roller clutches in the drive nut and in another by a ball and detent arrangement in the drive nut.

REFERENCES:
patent: 3157258 (1964-11-01), Cronholm
patent: 4417650 (1983-11-01), Geisthoff
patent: 4693132 (1987-09-01), Buxton et al.
patent: 4792321 (1988-12-01), Lundquist

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