Communications: electrical – Selective – Having indication or alarm
Patent
1975-03-17
1976-09-28
Caldwell, John W.
Communications: electrical
Selective
Having indication or alarm
307 10AT, 331113R, 340274R, B60R 2510
Patent
active
039835340
ABSTRACT:
An alarm control circuit, designed as a unit package to be mounted in the interior of a vehicle, is adapted for connection to the ignition switch circuit, to a vehicle door or other closure operated light switch circuit, and to the vehicle battery, with the output being connected to the vehicle horn circuit. The alarm control circuit is completely automatic when operated through the vehicle ignition switch and a vehicle closure switch, and sounds the vehicle horn intermittently when a closure is opened by unauthorized persons. The alarm control circuit may also be connected to the vehicle headlight switch circuit to provide the ancillary function of a warning signal, should the headlights be left on with the ignition switch off.
REFERENCES:
patent: 3421157 (1969-01-01), Atkins
patent: 3585584 (1971-06-01), Behrend
patent: 3605087 (1971-09-01), Nine
patent: 3740713 (1973-06-01), Teich
patent: 3781854 (1973-12-01), Kaufman et al.
patent: 3930226 (1975-12-01), Plumberg
Caldwell John W.
Murphy Peter J.
Nowicki Joseph E.
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