04284861 is referenced by 21 patents and cites 7 patents.

A switch hinge includes door and jamb leaves having aligned knuckles through which a hinge pin extends. The hinge pin is fixed firmly in position with respect to the knuckles of the door leaf, and within one of the knuckles of the jamb leaf it has an eccentric camming surface. The jamb leaf has a transverse bore that extends from the region of the camming surface in its knuckle to the opposite side edge of the leaf, and intermediate the ends of the bore the jamb leaf is further provided with a recess that opens solely out of its back face. The bore contains a push rod which is threaded through an actuator within the recess, and this actuator is located opposite to a switch that is mounted firmly on the back of the jamb leaf. A coil-type compression spring encircles the push rod within the recess and urges it toward the hinge pin with sufficient force to enable the actuator to depress the actuating element on the switch when the hinge is closed. When the leaves spread apart as the door is opened, the camming surface drives the push rod outwardly and moves the actuator away from the switch, thereby causing the switch to change condition. The precise angular position at which the switch changes condition may be adjusted by engaging the push rod with a tool from the open end of the bore and turning the push rod. The leaves also contain wire channels that lead to unoccupied regions of two of the knuckles for accommodating through wires.

Switch hinge
Application Number
Publication Number
Application Date
January 9, 1980
Publication Date
August 18, 1981
David A Senften
Gravely Lieder & Woodruff
Hager Hinge Company
H01H 3/16
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