Exit device actuator and dogger

Details Exit device actuator and dogger Exit device actuator and dogger

1988-10-03

1989-10-24

Smith, Gary L.

Closure fasteners

Bolts

Emergency operating means

292201, 70 92, E05B 6510

Patent

active

048757225

ABSTRACT:
An electrically operated exit device comprises a low powered dogging assembly for a pushbar and an electrical actuator for a latch bolt. A latching bracket is attached to the pushbar for movement inwardly and outwardly along a path. A dogging plate of the dogging element is pivotally moveable between a retracted position out of the path of the latching element and an extended position in the path of the latching element. The dogging plate is spring biased toward the extended position and has a protruding shoulder. When the dogging plate is extended and the pushbar moved inward manually, the latching bracket strikes the dogging plate, retracts it slightly against the force of the spring bias and then continues slightly beyond the shoulder of the dogging plate. Then, the dogging plate again extends fully under the influence of the spring bias such that a bearing surface on the far side of the shoulder catches the latching bracket and thereby dogs the pushbar. The electric latch bolt actuator is coupled to a deadbolt by a first linkage assembly and to the latch bolt by the second linkage assembly and simultaneously manipulates the deadbolt and latch bolt to free the door.

REFERENCES:
patent: 2325225 (1943-02-01), Burke
patent: 3386761 (1968-06-01), Johnstone
patent: 3751088 (1973-08-01), Schlage et al.
patent: 3767238 (1973-10-01), Zawadzki
patent: 3917330 (1973-11-01), Quantz
patent: 4237711 (1980-12-01), Kambil
patent: 4268076 (1981-05-01), Itoi
patent: 4351552 (1982-09-01), Vander Linden
patent: 4406487 (1983-09-01), Stendal
patent: 4573333 (1986-03-01), Choi
patent: 4593543 (1986-06-01), Stefanek

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