Sound response time switch for flowing current for a predetermin

Details Sound response time switch for flowing current for a predetermin Sound response time switch for flowing current for a predetermin

1981-01-21

1982-09-14

Gellner, Michael L.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

179110A, H01H 3500, H04R 1700

Patent

active

043497470

ABSTRACT:
A sound received by a diaphragm is converted by means of a piezo-electric element into an electric current and amplified. The amplified current functions to cause both a monostable multi-vibrator circuit and a load drive circuit to operate in cooperation to close a circuit to an actuator for a predetermined period of time so as to allow it to actuate the load for the predetermined period.

REFERENCES:
patent: 3440347 (1969-04-01), Spencer et al.
patent: 3582671 (1971-06-01), Ott
patent: 3638052 (1972-01-01), Massa
patent: 3710040 (1973-01-01), Swinehart
Voice Operated Control Switch, Elector, Dec. 1979, vol. 5, pp. 12-40 to 12-41.
A Sound Controlled Switch by P. Martin, Revista Espanola de Electronica, vol. 27, pp. 30-31, Aug.-Sep., 1980.

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