Fire alarm
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 7, 2004
Grant Date -
N/A
app pub date -
Nov 13, 2000
filing date -
Nov 19, 1999
priority date (Note) -
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Abstract
A fire alarm having an electronic evaluator, an optical module, a temperature sensor, and at least one combustion gas sensor, where the electronic evaluator diagnoses one of a plurality of fire types and selects an application-specific algorithm based on the diagnosed fire type. The electronic evaluator uses the signals from the sensors to diagnose at least one of a plurality of types of fire. The fire alarm may have at least one polarization filter which may be an active polarizer with electrically adjustable polarization plane.
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