Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1992-11-30
1995-01-31
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340531, 455 382, G08B 108
Patent
active
053862090
ABSTRACT:
An alarm unit is adapted to cooperate by radio transmission with a plurality of other such units arranged in a cluster. Each alarm unit includes a radio transmitter and receiver; a modulator for the transmitter and a demodulator for the receiver; an identifying pre-settable switch for identifying the particular alarm unit in the cluster; multiple alarm transducers for identifying a particular one of a plurality of types of alarm; an encoder coupled to the alarm transducers for controlling the modulator, whereby the transmitter can transmit an encoded transmission identifying the particular alarm unit and the particular alarm type; a decoder for decoding the identification of another of the units in the cluster which is transmitting and the type of its present alarm; and a display for displaying the other unit's identification and the alarm type.
REFERENCES:
patent: 3689888 (1972-09-01), Wootton
patent: 3909826 (1975-09-01), Schildmeier et al.
patent: 4358756 (1982-11-01), Morel et al.
patent: 4581605 (1986-04-01), Vogt
patent: 4622538 (1986-11-01), Whynacht et al.
patent: 4672365 (1987-06-01), Gehman et al.
patent: 4812820 (1989-03-01), Chatwin
patent: 4859990 (1989-08-01), Isaacman
Crosland Donnie L.
Griggs Dennis T.
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