Audio and visual alarm device
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United States of America Patent
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-
May 3, 1988
Grant Date -
N/A
app pub date -
Mar 3, 1986
filing date -
Mar 6, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An alarm device capable of producing an audible as well as a visual alarm is disclosed. The alarm device comprises a gong, a DC motor of a commutator type and a hammer operatively connected to an output shaft of the motor for striking the gong. The alarm device further comprises a high-voltage generating circuit connected to the motor, a flash tube and an exciter circuit for the tube. When a DC power is supplied to the motor to strike the gong by the hammer, the high-voltage circuit generates a high voltage in accordance with a square-wave current which flows through the motor. The exciter circuit is energized by the high voltage and excites the flash tube to thereby produce flashes of light.
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