Detector and alarm apparatus and system

Details Detector and alarm apparatus and system Detector and alarm apparatus and system

1995-08-11

1999-06-22

Horabik, Michael

Communications: electrical

Continuously variable indicating

Combined

340517, 340506, 340539, 34082536, 307116, G08B 1900, G08B 2100

Patent

active

059146745

ABSTRACT:
An alarm apparatus includes two sensor circuits. One of the circuits is configured to emit an audible warning upon the sensing of an adverse condition. The other circuit functions to scan for a radio signal and, when one is detected, transmit a further radio signal. The apparatus can be used alone or together with a series of other similar apparatuses to create a warning system. When used as part of a system, once one apparatus is activated due to the existence of, for example, a fire, the apparatuses produce a alarm signal and transmit a radio signal. Transmission of the subsequent radio signal is sensed by the other apparatuses of the system which, in a cascade fashion, also become activated.

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patent: 5430433 (1995-07-01), Shima
patent: 5440301 (1995-08-01), Evans

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