Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1988-01-20
1989-01-31
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
340539, 340506, 340531, G08B 1900, G08B 108
Patent
active
048019240
ABSTRACT:
A security system for sensing the status of various security detectors used in, for example, home security such as fire, intrusion, emergency and appliance operation protection is disclosed. The detectors transmit, usually via radio frequency, various messages to a central monitor. To enable proper communication, the transmitters are programmed to transmit messages unique to the originating detector. The transmitters may be programmed at one station and then moved to the detector for insertion therein. During this transport, it is important that a volatile memory of the transmitter be retained. This is accomplished by a low power source. A disarming device is provided to disarm the transmitter during transport to prevent the transmitter from draining a short term power source by transmitting a message. This avoids the loss of any programmed information in the evaporative memory.
REFERENCES:
patent: 4354252 (1982-10-01), Lamb et al.
patent: 4442426 (1984-04-01), Heuschmann et al.
patent: 4465904 (1984-08-01), Gottsegen et al.
patent: 4581606 (1986-04-01), Mallory
patent: 4672365 (1987-06-01), Gehman et al.
patent: 4737770 (1988-04-01), Brunius et al.
Burgmann Thomas A. D.
Lennartz Gary
Crosland Donnie L.
Dicon Systems Limited
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