Defeater for mechanical safety interlock for covers of explosion

Details Defeater for mechanical safety interlock for covers of explosion Defeater for mechanical safety interlock for covers of explosion

1975-11-07

1977-06-21

Scott, James R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

74483R, 174 52R, 200302, H01H 920, H01H 3346

Patent

active

040313409

ABSTRACT:
An explosion-proof electrical enclosure has a body, switch mounted within the body, two threaded caps cooperatively engaging manually defeatable locking bolts in the body which prevent rotation of the caps and manually operated interlocking mechanism mounted in the body to actuate a switch and prevent unlocking of the bolts in the switch on position.

REFERENCES:
patent: 1971990 (1934-08-01), Reynolds et al.
patent: 2156572 (1939-05-01), Olley
patent: 2194549 (1940-03-01), Hardage
patent: 2284613 (1942-05-01), Hyde, Jr.
patent: 3016431 (1962-01-01), Steigerwald
patent: 3743800 (1973-07-01), Appleton et al.

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