Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2005-01-04
2005-01-04
Goins, Davetta W. (Department: 2632)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S514000, C340S539100, C340S628000, C340S632000
Reexamination Certificate
active
06838988
ABSTRACT:
A cost effective system for testing smoke detectors and determining and communicating the operating characteristics thereof, advantageously uses existing circuitry components in a secondary communication function. With this arrangement, a low powered RF reporting signal is transmitted from the smoke detector and can be received within several feet of the detector. Preferably the RF signal is produced by a pulsed input signal provided to an existing coil which is part of the circuitry used to produce and/or report alarm signals. A receiving arrangement is also disclosed which can be located in close proximity to a smoke detector which has been activated to report the operating characteristics thereof. These characteristics can then be analyzed to determine whether preventive maintenance is appropriate.
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Lennartz Gary
Singleton Scott
Dennison Associates
Digital Security Controls Ltd.
Goins Davetta W.
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