Nail saver extension keys

Details Nail saver extension keys Nail saver extension keys

1992-06-09

1993-04-13

Burr, Edgar S.

Typewriting machines

Key-board or key lever-actuating mechanism

Key-cap or key-stem structure

400472, B41J 516

Patent

active

052015947

ABSTRACT:
Keys of an electronic keyboard shaped in a novel way, in order to permit the comfortable operation of the keys, especially by a business machine operator with long fingernails. Because of those changes in the key shape and character placement, the opportunity to set the plane of use of a keyboard anterior-posteriorly into an unlimited number of positions from a strong posterior tilt to a moderate anterior tilt, is thus afforded, giving increased comfort to keyboard operators, regardless of the length of their fingernails.

REFERENCES:
patent: 2435130 (1944-10-01), Cunningham
patent: 2484866 (1949-10-01), Henry
patent: 4100402 (1978-07-01), Lundstrom et al.
patent: 4769516 (1988-09-01), Allen
Shelkofsky "Changeable Keyboard" IBM Technical Disclosure Bulletin vol. 21, No. 10 Mar. 1979 p. 4098.

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