Control devices of the relay type

Details Control devices of the relay type Control devices of the relay type

1978-03-29

1980-03-18

Pitts, Harold I.

Communications: electrical

Audible indication

Percussion-type sound producer

3403782, G08B 500

Patent

active

041941896

ABSTRACT:
The invention concerns a switching device using electrets. It comprises at least two electrodes and at least two electrets; control signals are applied between electrodes to cause a mobile element carrying an electret to pass from one rest position to the other.
Application to electrical, pneumatic and optical switching.

REFERENCES:
patent: 2931954 (1960-04-01), Diesel
patent: 3178702 (1965-04-01), Aiken
patent: 3210757 (1965-10-01), Jacob
patent: 3381291 (1968-04-01), Simshauser
patent: 3528009 (1970-09-01), Astrove
patent: 3553364 (1971-01-01), Lee
patent: 3648269 (1972-03-01), Rosenweig
patent: 3648281 (1972-03-01), Dahms
patent: 3825927 (1974-07-01), Passien
patent: 3902170 (1975-08-01), McElroy
patent: 3942029 (1976-03-01), Kawakami
patent: 4065677 (1977-12-01), Micheron
patent: 4078183 (1978-03-01), Lewiner
I.B.M. Technical Disclosure Bulletin, "Electrostatic Light Switch", R. W. Callahan.

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