Tamper resistant alarm annunciator

Details Tamper resistant alarm annunciator Tamper resistant alarm annunciator

1977-07-11

1978-09-26

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

With particular system function

340566, 340568, 340653, 340693, G08B 2900

Patent

active

041174674

ABSTRACT:
A tamper-resistant box for protecting the hooters of burglar and fire alarm systems. The box has a fixed frame to be attached to a support, such as a building, and a moveable cover separated slightly from the frame by interposed springs. Microinterrupters are sensitive to any movement of the moveable cover relative to the frame to energize the hooter when the moveable cover is touched.

REFERENCES:
patent: 667115 (1901-01-01), Coleman
patent: 735324 (1903-08-01), Weatherby, Jr.
patent: 880668 (1908-03-01), Jones
patent: 2627065 (1953-01-01), Poulson

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