Electricity: circuit makers and breakers – Interlocking – Between plural switches
Patent
1975-04-14
1977-01-18
Scott, James R.
Electricity: circuit makers and breakers
Interlocking
Between plural switches
H01H 920
Patent
active
040041131
ABSTRACT:
A drawout mechanism includes a carriage mounting a circuit breaker and supported on telescoping rails to facilitate racking movement of the circuit breaker between extreme positions of electrical engagement and disengagement with respect to switchboard primary discount contacts. In an intermediate test position, the primary contacts are disengaged by secondary contacts of the circuit breaker and switchboard remain engaged for testing of accessorial functions. An indicator identifies these engaged test and disengaged positions. Rocking movement is powered via a racking screen and cam combination to provide enhanced mechanical advantage. The carriage is locked on the rails during racking movement, and manually operable gates selectively control movement of the carriage between the test and disengaged positions. Provisions are made to padlock the carriage in the test and disengaged positions, and latches control the rail conditions while the carriage is dismounted.
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Ericson Eric Axel
Kaufhold Frederick Daniel
Bernkopf Walter C.
Cahill Robert A.
General Electric Company
Neuhauser Frank L.
Scott James R.
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