Alarm system for three-element windows

Details Alarm system for three-element windows Alarm system for three-element windows

1975-05-01

1976-03-09

Swann, III, Glen R.

Communications: electrical

Systems

Call station

200 6193, 335206, 335207, G08B 1308

Patent

active

039434850

ABSTRACT:
An alarm system is constructed to energize when the bottom window or the top window of a three-element window assembly is opened, so long as the third element (usually a screen) is not in its closed position in front of the window being opened or if the third element is removed from its mounting slides.
The switching functions are performed by magnetic reed switches imbedded in the window frame and responsive to permanent magnets in the peripheral frame of the respective elements.

REFERENCES:
patent: 3710369 (1973-01-01), Takahashi
patent: 3742479 (1973-06-01), Williams

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