Two-step alarm disarming device with automatic rearming feature

Details Two-step alarm disarming device with automatic rearming feature Two-step alarm disarming device with automatic rearming feature

1987-06-03

1990-12-25

Orsino, Joseph A.

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

307 102, 340428, B60R 2504

Patent

active

049806661

ABSTRACT:
The invention is a two-step alarm disarming device with automatic rearming which uses sensors and buffer circuits to detect the condition of the car doors, hood, and trunk. It can disarm an alarm in two steps--with a signal input to an exterior key switch buffer for temporary disarming and a signal input to the ignition for permanent disarming. It is comprised of two-step alarm disarming circuits, a flip-flop, a timer, and a buffer for alarm disarming so that the burglar alarm can operate at maximum effectiveness without failure due to external interference or user negligence.

REFERENCES:
patent: 3866168 (1975-02-01), McGuirk
patent: 4543568 (1985-09-01), Hwang
patent: 4574268 (1986-03-01), Ohnishi
patent: 4638292 (1987-01-01), Mochida et al.
patent: 4691801 (1987-09-01), Mann et al.
patent: 4706064 (1987-11-01), Hwang

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