Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-10-28
1999-07-27
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
340594, 3406918, 3406935, 3406936, G08B 1706
Patent
active
059297620
ABSTRACT:
A heat alarm for an electric panel cabinet that mounts a temperature sensor within the enclosed area defined by the cabinet and sounds an alarm if the temperature within the cabinet exceeds an upper temperature limit. The heat alarm includes a microprocessor that operates an audible alarm upon sensing an overheat condition. After operating the audible alarm for a continuous period of time, the microprocessor operates the audio alarm in a series of sound pulses separated by a silence interval. The silence interval increases as the continuous period during which the temperature in the electric panel exceeds the upper temperature limit increases. The heat alarm includes a manually operable alarm override device that can be depressed to deactivate the audible alarm for an override period to allow the home/business owner to address the overheat condition within the electric panel cabinet, without the distraction of the audible alarm.
REFERENCES:
patent: 4660027 (1987-04-01), Davis
patent: 4864283 (1989-09-01), Seto
patent: 4962373 (1990-10-01), Sirois
patent: 5461367 (1995-10-01), Altavela et al.
Reliance Controls Corp.
Swann Glen
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