Electrical resistors – Mechanically variable – Musical instrument playing key actuated
Patent
1979-11-26
1981-05-19
Albritton, C. L.
Electrical resistors
Mechanically variable
Musical instrument playing key actuated
84DIG7, 338 99, 338114, H01C 1010, H01C 1012
Patent
active
042688159
ABSTRACT:
A multi-function touch switch apparatus has a first semiconductor composition layer disposed on top of a first conductor layer which is affixed to a first base member. A second semiconductor composition layer opposing the first semiconductor in spaced relationship thereto is disposed on a second conductor layer which is itself disposed on the bottom surface of a second support member. A third conductor layer is also disposed on the top surface of the second support member in opposing spaced-apart relationship to a fourth conductor layer disposed on the bottom surface of a third support member. The second and third support members and the affixed conductor layers and semiconductor layers are resiliently deformable in a transverse axis in response to a transverse touch force to thereby cause electrical contact between the second and third conductor layers to provide a closed switch and the first and second semiconductor layers to provide a closed switch in series with a pressure sensitive resistance.
REFERENCES:
patent: 1926419 (1933-09-01), Apple
patent: 3626350 (1971-12-01), Suzuki et al.
patent: 3917917 (1975-11-01), Murata
patent: 3960044 (1976-06-01), Nagai et al.
Christiansen M. Tyrone
Eventoff Franklin N.
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