Electrical switching device

Details Electrical switching device Electrical switching device

1986-01-09

1987-04-07

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

H01H 920

Patent

active

046563229

ABSTRACT:
An electrical switching device characterized by an enclosure containing a switch operable between ON and OFF positions by a handle releasably lockable in the OFF position; the handle being disposed between the enclosure and a handle guard, the guard having an opening, the handle having a tab engaging a shoulder surface in the opening when in the OFF position; an interlock plate for releasably latching an enclosure cover in place and the plate being releasable by movement of the handle in the OFF position; and the handle being movable to the ON position only by manipulation of the interlock plate, whereby accidental movement of the handle is avoided.

REFERENCES:
patent: 1489712 (1924-04-01), Platt
patent: 2079286 (1937-05-01), Hammerly
patent: 2645688 (1953-07-01), DeSmidt et al.
patent: 2695934 (1954-11-01), Wills
patent: 2770688 (1956-11-01), Johnson
patent: 2806099 (1957-09-01), Rexroad
patent: 2890302 (1959-06-01), De Benedictis
patent: 3179759 (1965-04-01), Rice et al.
patent: 3312794 (1967-04-01), Hollyday
patent: 4168416 (1979-09-01), Josemans
patent: 4180716 (1979-12-01), Suzuki
patent: 4291207 (1981-09-01), Reinke et al.

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