Error-free control circuit for alarm detectors

Details Error-free control circuit for alarm detectors Error-free control circuit for alarm detectors

1989-03-01

1992-01-28

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340529, 340566, G08B 1300

Patent

active

050846973

ABSTRACT:
An error-free control circuit for burglar alarm detectors which eliminates false alarms and facilitates setting the sensitivity of the detectors by providing an audible pre-warning signal via some alarm warning device to indicate false alarms and impending violation by a burglar an alarm signal from an alarm upon actual violation by a burglar. When the detector detects a false alarm condition, a pre-warning audible signal is sounded by the alarm warning device for easy sensitivity setting during installation. When the detector detects the sounds of tampering to the car, a pre-warning audible signal is sounded by the alarm warning device to warn the would-be burglar that the premises are protected by an armed alarm. Finally, when the detector detects actual violation of the protected premises, the alarm sounds to scare the burglar away. By this means, an alarm detector can be set to give optimum performance under any condition.

REFERENCES:
patent: 4331952 (1982-05-01), Galvin et al.
patent: 4365239 (1982-12-01), Mongeon
patent: 4521768 (1985-06-01), Haran et al.
patent: 4568920 (1986-02-01), Mombelli
patent: 4803468 (1989-02-01), Seifert

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