Vehicle anti-theft alarm circuit

Details Vehicle anti-theft alarm circuit Vehicle anti-theft alarm circuit

1974-11-15

1976-06-29

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

307 10AT, 180114, B60R 2510

Patent

active

039672395

ABSTRACT:
An anti-theft system for a motor vehicle which includes an ARM ENABLE latch and an ARM latch which establish a circuit arming condition in response to movement of a key operated switch from a neutral to an arming position. An ALARM latch is responsive to a plurality of sensor switches which in turn are responsive to whether a compartment of the vehicle is open or closed. If a compartment is opened after the arming condition has been established the ALARM latch causes the vehicle horn to be periodically energized for a predetermined interval of time. Delay means are provided for preventing a change of state of the various latches for a predetermined interval of time after actuation of the switch controlled input to the latch so as to prevent inadvertent triggering of the latch circuit. Indicator means are provided for detecting a malfunction in the system which would prevent the circuit arming condition from being established.

REFERENCES:
patent: 3585584 (1971-06-01), Behrend
patent: 3740713 (1973-06-01), Teich
patent: 3781854 (1973-12-01), Kaufman

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