Alarm detection and identification system

Details Alarm detection and identification system Alarm detection and identification system

1976-08-18

1978-06-13

Waring, Alvin H.

Communications: electrical

Audible indication

Pneumatic-type sound producer

340 52F, 340172, 340412, G08B 1900

Patent

active

040952207

ABSTRACT:
An alarm detection and identification system capable of detecting one or more alarms at remote sites and capable of identifying at a detection and identification station which remote sites have had alarms is disclosed. In one embodiment, the electrical signals necessary to distinguish between many remote sites can be carried along a single pair of transmission wires by using distinctive analog addresses for the various remote sites. Also, the system uses only a minimum of energy during non-alarm situations, and thus, can be battery operated. Additionally, the analog address currents are additive, allowing any number of remote sites to be added to the system.

REFERENCES:
patent: 3503067 (1970-03-01), Amiragoff
patent: 3725865 (1973-04-01), Fairchild

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