Variable speed warning device
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United States of America Patent
Stats
-
Apr 3, 2001
Grant Date -
N/A
app pub date -
Sep 22, 1994
filing date -
Sep 22, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for increasing the effectiveness of emergency signalling devices on vehicles. An emergency signalling device such as a flashing light is repeatedly operated at a frequency rate that corresponds to the speed of the vehicle. A minimum repetition rate is employed when the vehicle is slow or stopped so that the signal is not similarly halted, and a maximum rate is employed above a certain speed so that the repetition rate is not at too high of a frequency to be perceived.
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