Keyboard key with means for supporting large key surface

Details Keyboard key with means for supporting large key surface Keyboard key with means for supporting large key surface

1984-08-16

1986-04-01

Marcus, Stephen

Electricity: circuit makers and breakers

Electric switch details

Actuators

H01H 1302

Patent

active

045800227

ABSTRACT:
An improved key for typing keyboards or other terminal keyboards, which is ubstantially larger than the other keys and large compared with the contact to be actuated. In order to avoid tilting during out-of-center pressing, two shears are provided as a guiding means between the mobile and the immobile key parts. The shears are comprised of two frame parts pivoted about axes which are held aligned flush with each other. The shear arms provide four support points at their top free ends which enclose a rectangular surface which is practically congruent with the touch surface.

REFERENCES:
patent: 3916150 (1975-10-01), Abernethy et al.
patent: 4433225 (1984-02-01), Cowles
patent: 4453063 (1984-06-01), Wanatowicz, Jr. et al.

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