Keyboards

Details Keyboards Keyboards

1974-04-08

1976-06-22

Burr, Edgar S.

Textiles: fiber preparation

197107, 200159B, 235145R, 340365E, B41J 508, B41J 518, B41J 526

Patent

active

039645932

ABSTRACT:
A key for an electronic keyboard comprises a plunger in a body which is mounted on the keyboard chassis and striker, with a helical spring within the plunger for engaging the striker. To provide required tactile characteristics, a further spring means, e.g., a bowed diaphragm, is arranged between the plunger and the striker and also a snap-action spring is arranged between the plunger and the body.

REFERENCES:
patent: 2945111 (1960-07-01), McCormick
patent: 3165611 (1965-01-01), Hagberg
patent: 3668356 (1972-06-01), Kekas
patent: 3710209 (1973-01-01), Webb et al.
patent: 3767022 (1973-10-01), Olson
patent: 3783205 (1974-01-01), Boulanger
patent: 3797630 (1974-03-01), Zilkha
patent: 3822776 (1974-07-01), Pratt
IBM Tech Disclosure Bulletin, vol. 13, No. 7, pp. 12-70, "Push Button Actuator", Jarvis et al.

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