Keyboard for miniature data processing devices

Details Keyboard for miniature data processing devices Keyboard for miniature data processing devices

1986-09-15

1988-07-05

Caldwell, Jr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

200330, 200332, 200153T, H01H 304

Patent

active

047557966

ABSTRACT:
A manual data entry keyboard includes a plurality of key assemblies, each having an elongated arm and a touch contact at an outer end region of a respective arm. The arms are movable between a retracted position and an extended position, in the latter of which the touch contacts are spaced apart from each other by distances sufficient to enable a user to engage one touch contact at a time without simultaneously engaging an adjacent touch contact. A synchronizer ring simultaneously moves all of the arms between the retracted and extended positions.

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patent: 4268913 (1981-05-01), Nakagiri et al.
patent: 4434340 (1984-02-01), Kondo

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