Keycap overlay snap-on system

Details Keycap overlay snap-on system Keycap overlay snap-on system

1992-05-15

1993-02-02

Burr, Edgar S.

Typewriting machines

Key-board or key lever-actuating mechanism

Key-cap or key-stem structure

400491, 400493, B41J 508, B41J 510

Patent

active

051833468

ABSTRACT:
A system for converting graphic symbols on a computer data entry keyboard to another set of graphic symbols such as a foreign language or scientific symbols or mathematical notations is disclosed. The system comprises a plurality of individual keycaps, each keycap being sized for fitting over the upper surface of a single data entry key on the computer data entry keyboard. Each keycap has two indicia inscribed thereon. The first indicia, corresponding to the graphic symbol to be displayed upon the skriking of the data entry key is inscribed on the upper exterior surface of the keycap. The second indicia, corresponds to the graphic symbol on the upper surface of the data entry key over which the keycap is positioned. A cabinet having a columnar orientation for receiving the keycaps in a stacked relationship when the keycaps are not in use and operation is also disclosed. A lid protects the keycaps when they are stored in the cabinet.

REFERENCES:
patent: 563167 (1896-06-01), Graham et al.
patent: 974488 (1910-11-01), Hay
patent: 3317019 (1967-05-01), Braune
patent: 3848723 (1974-11-01), Hogue
patent: 3871506 (1975-03-01), Von Luders
patent: 4185282 (1980-01-01), Pick
patent: 4512092 (1985-04-01), McLaughlin et al.
patent: 4755072 (1988-07-01), Hoornweg
patent: 4906117 (1990-03-01), Birdwell

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