Electricity: circuit makers and breakers – Interlocking – Between plural switches
Patent
1976-12-02
1978-08-15
Schaefer, Robert K.
Electricity: circuit makers and breakers
Interlocking
Between plural switches
200333, H01H 922
Patent
active
041074882
ABSTRACT:
An electric switch mounted within an enclosure having a hinged cover is manually operated from outside the enclosure by a handle mechanism secured to the enclosure. The cover is provided with a single aperture near the edge thereof remote from the cover hinges, with this aperture providing clearance for the operating handle of the mechanism when the cover is closed and also providing clearance for a catch which holds the cover closed. The mechanism also includes a defeatable cover interlock to prevent opening of the cover when the switch is closed, and a defeatable switch interlock to prevent closing of the switch when the cover is open.
REFERENCES:
patent: 3213224 (1965-10-01), Mrenna
patent: 3229056 (1966-01-01), Turnbull
patent: 3296393 (1967-01-01), Rimmer
patent: 3801765 (1974-04-01), Hodgson
patent: 3896353 (1975-07-01), Burton
patent: 3980845 (1976-09-01), Gryctko
DiMarco Bernard
Fenneteau Michel M.
Keller Frank R.
Kussy Frank W.
Feeney William L.
Gould Inc.
Schaefer Robert K.
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