Input keyboard for an electronic appliance in entertainment elec

Details Input keyboard for an electronic appliance in entertainment elec Input keyboard for an electronic appliance in entertainment elec

1991-04-03

1992-11-17

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Musical instrument playing key actuated

338114, 84423B, H01C 1010

Patent

active

051646978

ABSTRACT:
An input keyboard (1) contains a switching device (3) for pushbuttons (22) wherein the contact linings (11.1, 11.2) on a printed circuit board (10) are bridged by a countercontact (16) operated by the pushbutton (22). The countercontact (16) consists of a carbonized plastic foil (14) and an electrically conducting layer (17) on the side facing away from the contact linings. By virtue of this arrangement there comes into being a bridging resistance between the bridged conductor strips (12.1, 12.2) that depends on the operating pressure (P) applied to the pushbutton, this resistance being then used to cause a control circuit arrangement (6) to generate a control command (Bf) for setting a particular function and an adjustment command (Bw) for setting a particular value or adjustment rate.

REFERENCES:
patent: 4296406 (1981-10-01), Pearson
patent: 4419653 (1983-12-01), Waigand
patent: 4596912 (1986-06-01), Hattori
patent: 4847586 (1989-07-01), Tanaga et al.
Radio Mentor Elektronik, No. 11, (1980), pp. 311-315.
Funkschau, 1985, p. 12.

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