US 4,875,722 AGranted

Exit device actuator and dogger

AssigneeEmhart Industries, Inc.

InventorsTheodore H. Miller, deceased, Ronald S. Slusarski

Life of this patent

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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.

Claims6

Dependent claims

In an exit device comprising a latch bolt supported for pivotal movement about a first axis between projected and retracted positions, a deadlocking lever supported for pivotal movement about a second axis generally parallel to the first axis between a locking position and a non-locking position and having a blocker engagable with an associated portion of said latch bolt when said latch bolt is in its projected position and said deadlocking lever is in its locking position for deadlocking said latch bolt in its projected position, the improvement comprising:

a solenoid having a plunger movable along a third axis between first and second end positions, said third axis being substantially perpendicular to said first and second axes.
first linkage means coupled between said deadlocking lever and said solenoid for translating longitudinal motion of said plunger of said solenoid to pivotal motion of said deadlocking lever,
second linkage means coupled between said solenoid plunger and said latch bolt for translating longitudinal motion of said solenoid plunger to pivotal motion of said latch bolt so that when said solenoid plunger is moved to said first end position, said deadlocking lever is pivoted to its non-locking position and said latch bolt is pivoted to its retracted position, the movement of said deadlocking lever from its locking position to its non-locking position causes the first linkage means to move a first distance, and the movement of said latch bolt from its extended position to its retracted position causes the second linkage means to move a second distance, with said second distance being greater than the first distance, and
said first linkage means comprises means for slipping itself relative to said second linkage means during movement of said plunger to said first end position to accommodate for the movement differential between the first and second linkage means.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 07/252,837Filed 3 Oct 1988 · division
Priority: 2 Sep 1986
Granted: 24 Oct 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

E05B 65/1073
Pivoting: the pivot axis being substantially pependicular to the longitudinal axis of the bar
E05B 47/00
Operating or controlling locks or other fastening devices by electric or magnetic
E05B 65/1093
For panic or emergency doors: dogging means for holding the actuation means, e.g. the actuating handle
Y10T 70/5159
Door: emergency exit