Keyboard having improved keytop

Details Keyboard having improved keytop Keyboard having improved keytop

1993-02-23

1996-01-23

Eickholt, Eugene H.

Typewriting machines

Key-board or key lever-actuating mechanism

Key-board including row of keys having different heights

3404072, 36470912, 235145R, 200341, B41J 508

Patent

active

054860598

ABSTRACT:
A keyboard includes a keyboard body, a plurality of keys arranged in rows and columns, and switching elements for turning switching elements ON and OFF in response to operations on the plurality of keys. A special key among the plurality of keys has a keytop which is at least a stroke length of the special key higher than keytops of keys arranged in a row in which the special key is located.

REFERENCES:
patent: 3464531 (1969-09-01), Herr et al.
patent: 3945482 (1976-03-01), Einbinder
patent: 4512092 (1985-04-01), McLaughlin et al.
patent: 4641723 (1987-02-01), Takanashi et al.
patent: 4830526 (1989-05-01), Hosono
patent: 4974183 (1990-11-01), Miller
patent: 5017030 (1991-05-01), Crews
patent: 5032698 (1991-07-01), Satoh
patent: 5391006 (1995-02-01), Danziger
"Contoured Keyboard" IBM Tech. Disclosure Bulletin, vol. 22, No. 3, Aug. 1979 pp. 1276-1277.

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