Electrical switching apparatus

Details Electrical switching apparatus Electrical switching apparatus

1987-04-06

1988-04-19

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Actuated concurrently with operation or use of art device

200 6176, 200159R, 200280, 2003022, H01H 316, H01H 900, H01H 1302

Patent

active

047391332

ABSTRACT:
An electrical switching device for door actuated operation especially configured for conversion between grounded and non-grounded operation is disclosed. The device includes a housing including a stationary contact and a moveable contact. The moveable contact is actuated by a door operated actuator which moveable contact makes and breaks contact with the fixed contact and completes a circuit to ground through the housing. The moveable contact and fixed contact are configured to receive and cooperate with an insulation member insertable between the two contacts and an additional contact member insertable between the insulation member and the moveable contact to convert the switch to non-grounded operation.

REFERENCES:
patent: 2748229 (1956-05-01), Block
patent: 2779833 (1957-01-01), Farison
patent: 2921155 (1960-01-01), Basso
patent: 3115559 (1963-12-01), Cass et al.
patent: 3244829 (1966-04-01), Webb
patent: 3375339 (1968-03-01), Schaber
patent: 3393281 (1968-07-01), Basso
patent: 3432634 (1969-03-01), Basso
patent: 4406935 (1983-09-01), Montag et al.
patent: 4492833 (1985-01-01), Malesko

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