Method and apparatus for character generation

Details Method and apparatus for character generation Method and apparatus for character generation

1981-06-29

1983-04-26

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

340365S, 178 17C, 400100, 400485, G08C 900, B41J 506

Patent

active

043815022

ABSTRACT:
Generation of a character code for an alphabetic character is performed by depressing at least two keys in a sequence. The code is generated when the last key is depressed and the other keys in the sequence still are pressed, or when all keys in the sequence are released. Numerical character codes are generated by depressing only one key per character. A logic and storage means is provided having a number of registers, code converting tables and control circuits for storing the history of depressed keys and for generating character codes.

REFERENCES:
patent: 3225883 (1965-12-01), Ayres
patent: 3892915 (1975-07-01), Budworth et al.
patent: 3932838 (1976-01-01), Sitter
patent: 3967273 (1976-06-01), Knowlton
patent: 3973256 (1976-08-01), Stoesser
patent: 4007443 (1977-02-01), Bromberg et al.
patent: 4012599 (1977-03-01), Meyer
patent: 4042777 (1977-08-01), Bequaert et al.
Conway et al., "Communications of the ACM", vol, 10, No. 9, Sep., 1967, p. 539.

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