Alarm device

Details Alarm device Alarm device

G - Physics

08

B

340/200

G08B 7/06 (2006.01)

Patent

CA 1297179

ABSTRACT OF THE DISCLOSURE 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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