Keyboard structure having panel mounted key actuators with elect

Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch

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200159R, 200295, 200338, 200340, 197 98, 235145R, 335205, 340365R, H01H 1314, H01H 3600, G06C 702

Patent

active

039405788

ABSTRACT:
An electronic keyboard has a chassis with keys each utilising a parallel motion linkage to permit movement of an operating member towards an electric circuit element. The main structure of the keys and linkage may be formed as a unitary plastics moulding.

REFERENCES:
patent: 3404315 (1968-10-01), Jacobs et al.
patent: 3582594 (1971-06-01), Twyford
patent: 3668356 (1972-06-01), Kekas
patent: 3678424 (1972-07-01), Iwashima et al.
patent: 3736397 (1973-05-01), Pedersen
patent: 3760137 (1973-09-01), Shimojo et al.
patent: 3797630 (1974-03-01), Zilkha
patent: 3829632 (1974-08-01), Klehm, Jr.
patent: 3829646 (1974-08-01), Lorteije et al.
IBM Technical Disclosure Bulletin, R. A. Johnson, "Keyboard," Vol. 13, No. 11, p. 3428, Apr. 1971.
IBM Technical Disclosure Bulletin, J. A. Mathewson et al., "Momentary Contact Actuator," Vol. 15, No. 10, pp. 3162-3163, Mar. 1973.

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