Self-tuning vehicle horn
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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May 9, 1995
Grant Date -
N/A
app pub date -
Apr 21, 1992
filing date -
Apr 21, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vehicle horn is disclosed with an electronic switching circuit which operates at a switching frequency equal to the resonant frequency of the horn. A sweep frequency oscillator generates a switching pulse train. A transducer and signal conditioner produces a horn output pulse train at a frequency equal to the acoustic output of the horn. The horn output pulse train is applied to one input of a phase comparator. The output of the sweep frequency oscillator is applied to the other input of the phase comparator. The phase comparator generates a stop signal for the sweep frequency oscillator when the input signals are in phase with each other which signifies that the horn is operating at its resonant frequency.
First Claim
Other Claims data not available