Typewriting machines – Key-board or key lever-actuating mechanism – Key-board arranged according to character location
Patent
1995-09-18
1997-05-06
Burr, Edgar S.
Typewriting machines
Key-board or key lever-actuating mechanism
Key-board arranged according to character location
400489, B41J 510
Patent
active
056264283
ABSTRACT:
A compact keyboard for use in a portable electronic device includes keys arranged in two level sets. Each set includes an upper level and a lower level, and the keys of the upper and lower levels of each set are arranged in an interdigitated or staggered fashion such the keys of each set form a pattern similar to a pattern of a single row of keys of a standard full-sized keyboard. This key arrangement allows a compact device having limited horizontal dimensions to mimic a key pattern arrangement of a full-sized keyboard. The keys may have pointed indicator portions that bear a character or symbol that indicates the functions of the keys. The pointed indicator portions of the upper and lower levels of a single set may be interdigitated such that characters or symbols on the keys are arranged in a substantially straight line.
REFERENCES:
patent: 1336122 (1920-04-01), Banaji
patent: 2080457 (1937-05-01), Bower
patent: 3698532 (1972-11-01), Dodds
Brother Kogyo Kabushiki Kaisha
Burr Edgar S.
Nguyen Anthony H.
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