Alerting system and arming/disarming apparatus therefor

Details Alerting system and arming/disarming apparatus therefor Alerting system and arming/disarming apparatus therefor

1978-01-05

1980-06-03

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

307 10AT, 180287, B60R 2510

Patent

active

042064392

ABSTRACT:
An alarm device which eliminates the possibility of totally disarming its alarm by a thief. In one embodiment, a magnet is swiped by a reed switch a predetermined number of times to set the device in an armed condition. With each swipe, a stepper arm in the electrical circuitry moves from one contact to the next, until in a contact position, known only to the authorized user, that sets the device in such armed condition. Should any current be drained off from the electrical source (battery) to energize any car electrical circuit (light bulb, say), current is also then made available to the armed device through the stepper arm contact, the alarm of the device thereby being activated. A simpler embodiment includes a mechanical latching relay DPST switch which is normally open, but is closed upon a magnet passed over a first reed switch to arm the device. The magnet is passed over a second reed switch to open such relay switch, disarming the device.

REFERENCES:
patent: 3569928 (1971-03-01), Avallone

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