Panelboard vent assembly

Details Panelboard vent assembly Panelboard vent assembly

1979-01-22

1981-04-14

Moore, Richard E.

Locks

Special application

For closures

49141, 49394, 70 93, 70 94, 70489, 174 66, 200306, 292 5, 292 8, 292 56, 292 99, 292338, 29234117, 292DIG65, E05B 5904, E05B 6300, E05C 1702, H02B 108

Patent

active

042611890

ABSTRACT:
A retainer plate is pivotally mounted on a panelboard cabinet door lock housing, which carries a latch for locking the door. A detent on the plate engages in a rabbet opening to enable limited opening movement of the door in response to the pressure developed by arc gases generated by fault currents passing through a tripped circuit breaker in the panelboard cabinet. For ordinary opening movement, the lock latch is manually operated to pivot the retainer plate and disengage the detent from the rabbet opening.

REFERENCES:
patent: 753642 (1904-03-01), Sliga
patent: 926321 (1909-06-01), Dominik
patent: 2106003 (1938-01-01), Hewitt
patent: 2197648 (1940-04-01), Mersheimer
patent: 2256465 (1941-09-01), Brubaker
patent: 2622429 (1952-12-01), Lipiner
patent: 2741505 (1956-04-01), Courney
patent: 3046615 (1962-07-01), Sherron
patent: 3402579 (1968-09-01), Hallgren
patent: 3690708 (1972-09-01), Worley et al.
patent: 4131932 (1978-12-01), Brumfield, Jr. et al.

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