Electricity: circuit makers and breakers – Interlocking – Between plural switches
Patent
1978-05-31
1980-06-03
Scott, James R.
Electricity: circuit makers and breakers
Interlocking
Between plural switches
H01H 920
Patent
active
042063299
ABSTRACT:
An operating mechanism for enclosed high-voltage switches is movable in tracks attached to the side of an enclosure. In a test position, the mechanism is uncoupled from the switches and moved away therefrom to permit it and its control circuits to be exercised without operating the switches. In a maintenance position, the operating mechanism is moved further away from the switches to provide access for conducting maintenance. A latch automatically secures the mechanism in the test and maintenance positions. A lever on the outside of the enclosure selectively releases the mechanism from the test or maintenance positions permitting it to be reinserted or withdrawn further, and also indicates when the mechanism is in the test or maintenance positions. Normally, the lever does not permit complete withdrawal of the mechanism from the enclosure. A stop pin must be removed to permit sufficient lever operation for such complete withdrawal.
REFERENCES:
patent: 2777024 (1957-01-01), West
patent: 2954444 (1960-09-01), Jones et al.
patent: 3219771 (1965-11-01), Umphrey
patent: 3563102 (1971-02-01), Bernatt et al.
patent: 3710044 (1973-01-01), Sharp
patent: 3980977 (1976-09-01), Evans
patent: 4051335 (1977-09-01), Ericson et al.
Kaufmann John D.
S&C Electric Company
Scott James R.
LandOfFree
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