Compact keypad system and method

Details Compact keypad system and method Compact keypad system and method

1993-06-03

1997-03-18

Mullen, Thomas

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

36470915, 400485, H03K 1794

Patent

active

056126905

ABSTRACT:
In a key pad key cap symbols are placed at the interstices between key caps as well as at their centers. The key pad electronics are designed to register simultaneously actuated key caps at an interstice as an input uniquely associated with the symbol locate at the interstice. The linear dimension of a row of key caps are approximately one-half that of a conventional key cap requiring approximately two key caps to form a linear dimension sizable enough to comfortably accommodate the tip of an adult finger. Additionally, the symbols located at the centers of key caps are elevated slightly, allowing unimpeded and ergonomic access to individual keys as well as the interstices.

REFERENCES:
patent: 4891777 (1990-01-01), Lapeyre
patent: 4912462 (1990-03-01), Washizuka et al.
"Compact Keyboard", IBM Tech. Disch. Bulletin (Beausoleil et al.), vol. 13, No. 11, Apr. 1971.

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