Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-03-29
2000-07-04
Wu, Daniel J.
Communications: electrical
Condition responsive indicating system
Specific condition
340511, 340521, 340539, 340578, G08G 1710
Patent
active
060845228
ABSTRACT:
A wireless integrated smoke detector and temperature monitoring device. The device comprises a photoelectric sensor for determining the presence of smoke, thermistor for providing a temperature signal reflective of the temperature level, processing means for monitoring the smoke and temperature, and transmission means for transmitting messages to the alarm system controller. Rather than transmitting the actual temperature to the system controller, the transmitter transmits a status message which comprises status bits for low temperature trouble condition, smoke or heat alarm, and also low temperature trouble condition with smoke or heat alarm. To conserve battery power, the device alternates between a sleep mode and a wake mode. During the wake mode the trouble conditions are checked by the processor and if necessary, a status message is transmitted.
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Barkume Anthony R.
Pittway Corp.
Wu Daniel J.
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