Electric horn with solid state driver
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United States of America Patent
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-
Nov 3, 1992
Issued Date -
N/A
app pub date -
Sep 16, 1991
filing date -
Oct 19, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electric horn having a diaphragm connected to a ferromagnetic plunger is driven by an electromagnetic coil to cause vibrations of the diaphragm at the resonant frequency of the diaphragm and plunger combination. A solid state driver has a timer tuned essentially to the frequency of the diaphragm assembly and controls the driver power output to effect coil energization to drive the diaphragm movement synchronously with the timer frequency. The driver output stage comprises a power MOSFET or a Darlington pair.
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