Touch responsive keying unit for electronic musical instruments

Details Touch responsive keying unit for electronic musical instruments Touch responsive keying unit for electronic musical instruments

1975-09-29

1979-07-10

Schaefer, Robert K.

Music

Instruments

84 11, 84 114, 84DIG7, G10H 300

Patent

active

041604008

ABSTRACT:
A touch responsive unit for a keyboard electronic musical instrument. A high frequency signal source is connected to one plate of a normally open circuited variable capacitor. The other plate of the variable capacitor being mechanically connected to a force transferring mechanism and electrically connected to a circuit means for generating a control voltage envelope. The depressive force applied to the key through the transfer mechanism causes the capacitor plates to overlap. The degree of area overlap is proportional to the depressive force and determines the capacitance value. As the plate area overlap increases, the capacitance value increases and the peak amplitude of the high frequency source passed by the capacitor increases. The control voltage envelope of the circuit means is applied to a standard keyer circuit to amplitude modulate a tone signal source corresponding to the selected key. The slope or decay rate of the control voltage envelope is regulated by the circuit means.

REFERENCES:
patent: 2314496 (1943-03-01), Hammond
patent: 2623996 (1952-12-01), Gray
patent: 2809547 (1957-10-01), Caine
patent: 2931877 (1960-04-01), Henlei
patent: 3165022 (1965-01-01), Yokotama
patent: 3248470 (1966-04-01), Markowitz
patent: 3255293 (1966-06-01), Walker
patent: 3293640 (1966-12-01), Chalfin et al.
patent: 3480744 (1969-11-01), Yamada
patent: 3636232 (1972-01-01), Hiyama
patent: 3769869 (1973-11-01), Nelson, Jr.
patent: 3943812 (1976-03-01), Nagai et al.

Affiliated with

Also associated with

Rating

Touch responsive keying unit for electronic musical instruments does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Touch responsive keying unit for electronic musical instruments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Touch responsive keying unit for electronic musical instruments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-735912