Capacitance switching device for keyboard

Details Capacitance switching device for keyboard Capacitance switching device for keyboard

1987-03-18

1988-04-05

Scott, J. R.

Electricity: circuit makers and breakers

Special application

200DIG1, 200159B, 361288, H01G 501, H01H 1352

Patent

active

047360763

ABSTRACT:
Disclosed is a capacitance keyboard switching device comprising a fixed electrode formed on one surface of a first insulating film, a movable electrode formed on one surface of a second insulating film, a spacer interposed between the first and second insulating films and provided with a switching opening formed through the spacer for allowing the fixed and movable electrodes to come close to and separate from each other with one of the first and second insulating films interposed between the fixed and movable electrodes, a movable electrode depressing member provided with a depressing portion for depressing the movable electrode to cause the movable electrode to come close to the fixed electrode through the one insulating film, in order to keep the movable electrode flat when the movable electrode is depressed toward the fixed electrode, the depressing portion is provided with a surface area selected to be larger than a surface area of the movable electrode so that the surface area of the depressing member completely covers the surface area of the movable electrode when the depressing portion depresses the movable electrode, or the second insulating film is provided with slots formed therein.

REFERENCES:
patent: Re30435 (1980-11-01), Fukao
patent: 3696908 (1972-10-01), Gluck et al.
patent: 3750149 (1973-07-01), Sessler et al.
patent: 4066855 (1978-01-01), Zenk
patent: 4376239 (1983-03-01), Long et al.
patent: 4659879 (1987-04-01), Hasegawa

Affiliated with

Also associated with

Rating

Capacitance switching device for keyboard does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Capacitance switching device for keyboard, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitance switching device for keyboard will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2234792