Door position monitoring assembly

Details Door position monitoring assembly Door position monitoring assembly

G - Physics

08

B

340/128, 306/8

G08B 13/08 (2006.01) E05C 13/10 (1980.01)

Patent

CA 1157498

-22- Abstract of the Disclosure There is disclosed an improved door position monitoring unit for use in a security door installation. The unit includes track means for mounting with respect to a horizontal edge of a door and movable therewith, a cir- cuit component such as a switch mounted with respect to a stationary surface of the door installation, such as the door frame or the threshold. The circuit com- ponent is capable of being operated to attain a first condition, and a second condition which conditions can be detected by suitable circuit means. A control arm is provided to mechanically link the door to the switches, said control arm having one end thereof slidably con- nected to said track means, and being pivotally mounted proximate the other end thereof to the door frame, such that movement of said door will produce pivotal movement of said control arm. Actuator means are provided inter- connecting the pivotally mounted end of the control arm and the circuit component such that when the door is open said circuit component will be in a first con- dition, with rotation of said control arm upon movement of the door to the substantially closed position, pro- ducing a second condition for said circuit component, with initial movement of the door away from the fully closed position producing pivotal movement of the con- trol arm in an opposite direction permitting said cir- cuit component to return to said first condition.

380542

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