Self-contained burglar alarm device for sliding windows, doors a

Details Self-contained burglar alarm device for sliding windows, doors a Self-contained burglar alarm device for sliding windows, doors a

1988-05-11

1990-01-23

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

200 6171, 200 6193, G08B 1308

Patent

active

048961396

ABSTRACT:
An elongated housing has first and second ends and an alarm responsive to an electrical signal. A switch is provided for controlling the electrical signal and includes contact elements for activating the alarm in each of two activation modes corresponding to compression and extension of the housing. A mechanism is disposed at the housing first end for adjusting the length of the housing. Finally, a mechanism is disposed proximate the housing second end for enabling movement of the contact elements to initiate the two activation modes from an inactive alarm mode in cooperation with the housing length adjustment mechanism.

REFERENCES:
patent: 3797005 (1974-03-01), Schwarz
patent: 4193067 (1980-03-01), Hawkins
patent: 4472709 (1984-09-01), White
patent: 4495486 (1985-01-01), White
patent: 4553134 (1985-11-01), Holt

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