Electricity: circuit makers and breakers – Interlocking – Between plural switches
Patent
1991-11-06
1993-04-06
Scott, J. R.
Electricity: circuit makers and breakers
Interlocking
Between plural switches
H01H 920
Patent
active
052005852
ABSTRACT:
A circuit breaker, and method of constructing same, in which a levering-in mechanism may be added after the circuit breaker has been assembled. The circuit breaker includes a chassis having first and second side plates which define upwardly open slots, which enable the levering-in mechanism to be "dropped in" to the correct position of an assembled circuit breaker, with bottom portions of the slots functioning as half bearings. First and second retainer plates with downwardly open slots are respectively attached to the first and second side plates, to complete the half bearings and hold the levering-in assembly. The levering-in mechanism includes a threaded shaft having a traveling nut, with a bushing on the shaft being held radially, but not axially, by a bracket member, with the bushing also functioning as a non-stress stop for the traveling nut. New interlock arrangements are also associated with the levering-in mechanism, including interlocks which: (1) prevent access to the levering-in mechanism, (2) place the circuit breaker in a trip-free condition, and (3) discharge closing spring, in response to predetermined conditions.
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IB 33-790 IF-Instructions for Low-Voltage Power Circuit Breakers Types DS and DSL-Westinghouse Electric Corporation-Oct. 1983.
Davies Norman
Klimek Edward J.
Milianowicz Stanislaw A.
Patel Nagar J.
Moran M. J.
Scott J. R.
Westinghouse Electric Corp.
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