Monitor hinge

Details Monitor hinge Monitor hinge

1996-09-09

1998-02-10

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

340549, 340686, 200 617, G08B 1308

Patent

active

057173800

ABSTRACT:
A monitor hinge having a rotary switch or potentiometer that is concealed within knuckles of the hinge for providing an indication when a door or a window is open. A monitor cable connects terminals on the rotary switch or potentiometer through the hinge to an external monitoring apparatus. An optional power transfer cable passes power or a signal through the hinge between a wall and a door or a window.

REFERENCES:
patent: Re30716 (1981-08-01), Suska
patent: 2620411 (1952-12-01), Liley
patent: 4140357 (1979-02-01), Wolz et al.
patent: 4150265 (1979-04-01), Holden
patent: 4168409 (1979-09-01), McNinch
patent: 4185280 (1980-01-01), Wilhelm
patent: 4284861 (1981-08-01), Senften
patent: 4841283 (1989-06-01), Bubliewicz

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