Intrusion alarm system for vehicles

Details Intrusion alarm system for vehicles Intrusion alarm system for vehicles

1982-04-30

1987-04-14

Crosland, Donnie L.

Communications: electrical

Selective

Having indication or alarm

340528, 340539, B60R 2500

Patent

active

046582371

ABSTRACT:
An alarm system (10) for detecting unauthorized intrusion into a vehicle and determining the location of such vehicle includes a vehicle alarm (11) and one or more networks (12, 13, 14) for receiving the output signal from vehicle alarm (11). Vehicle alarm (11) includes a transmitter (40) for broadcasting a low frequency modulated radio frequency alarm signal at the citizen band distress frequency and a control unit (25) for selectively activating the alarm upon a drop in the voltage magnitude of the vehicle power supply (27) induced by an unauthorized intrusion. Networks (12, 13, 14) respectively include citizen band radio detectors (15), mobile dedicated alarm detectors (16), and fixed dedicated alarm detectors (17) accompanied by a display unit (18).

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