Audio-visual signal circuits

Details Audio-visual signal circuits Audio-visual signal circuits

1979-10-26

1981-06-16

Caldwell, Sr., John W.

Communications: electrical

Systems

Plural

340331, 340371, 340384E, 315135, G08B 700

Patent

active

042740843

ABSTRACT:
An audio-visual alarm includes a flashtube and a voltage signal generator for producing and storing voltages sufficient to operate the flashtube. In series with the flashtube and the voltage generator is the coil of an audio alarm, whereby operation of the flashtube also operates the audio alarm. The audio alarm is selected so that its coil will not interfer with the operation of the flashtube.

REFERENCES:
patent: 2696598 (1954-12-01), Lozowski
patent: 3355626 (1967-11-01), Schmidt
patent: 3810149 (1974-05-01), Miller et al.
patent: 3898514 (1975-08-01), Takahashi
patent: 4101880 (1978-07-01), Haus

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