Traffic Light Heater
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United States of America Patent
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N/A
Issued Date -
Oct 11, 2012
app pub date -
Mar 29, 2012
filing date -
Apr 6, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A circuit for controlling a heater element coupled to a traffic signal light includes: a thermistor positioned at an exterior of a lens of the traffic signal light, a resistance of the thermistor decreasing as a temperature of the lens increases; and a comparator positioned at an interior of the lens, the comparator being configured to monitor a feedback signal from the thermistor and to compare the feedback signal to a reference signal, and to turn power supplied to the heater element on and off based on the comparison.
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