Burglar alarm system

Details Burglar alarm system Burglar alarm system

1976-05-12

1977-10-11

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

3403091, 307 10AT, B60R 2510

Patent

active

040538699

ABSTRACT:
A protective alarm system for a vehicle or the like wherein a protective switch initiates operation of a circuit combining two timing effects : effecting time delaying of an alarm device, and determining the duration of the alarm. Once initiated by the protective switch, the alarm is actuated after a predetermined delay and for a predetermined duration despite any action on the switch such as a periodical opening and closing. Circuitry operated by a key switch defeats instantaneously actuation of the alarm system when a further manually operated knob is on, which results in a necessary order of operation, involving the possession of the key, to inhibit definitely the alarm.

REFERENCES:
patent: 3740713 (1973-06-01), Teich

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