Keyboard with keys concentrated in clusters

Typewriting machines – Key-board or key lever-actuating mechanism – Key-board including keys grouped to facilitate positioning...

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Details

400486, 4004913, B41J 510

Patent

active

045794707

ABSTRACT:
A typewriter keyboard arrangement with keys concentrated in clusters in such a manner so as to be operated by specific fingers designated for specific clusters. Keys are clustered and clusters arranged to allow rapid finger motion with little hand motion. The keyboard arrangement also allows the hands and arms to be positioned in a natural manner in relation to the body.

REFERENCES:
patent: 366166 (1887-07-01), Healy
patent: 556422 (1896-03-01), Von Kunowski
patent: 848471 (1907-03-01), Laudenbach
patent: 1138474 (1915-05-01), Heidner
patent: 1200439 (1916-10-01), Kemble
patent: 1342244 (1920-06-01), Wolcott
patent: 1652464 (1927-12-01), Tyberg
patent: 1678334 (1928-07-01), Fischer
patent: 2040248 (1936-05-01), Dvorak et al.
patent: 3929216 (1975-12-01), Einbinder
patent: 3945482 (1976-03-01), Einbinder
patent: 4244659 (1981-01-01), Malt
patent: 4332493 (1982-06-01), Einbinder
IBM Technical Disclosure Bulletin, "Input Keyboard", Stukert, vol. 14, No. 3, Aug. 1971, pp. 952-959.

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