Coded data generation or conversion – Bodily actuated code generator
Patent
1995-03-27
1996-10-15
Hofsass, Jeffery
Coded data generation or conversion
Bodily actuated code generator
341 22, 400490, H03K 1794, H03M 1100
Patent
active
055658652
ABSTRACT:
A key switch unit including a key holder frame having a plurality of key holders respectively mounted on the rubber cones of a conductive rubber pad above a membrane circuit, and one L-shaped key switch and a plurality of elongated key switches and a plurality of square key switches respectively mounted on the key holders and depressed to trigger the membrane circuit to produce a respective electric signal, wherein the key holders each has a center through hole and an inside annular flange within the center through hole; the square key switches each has a stepped long plunger inserted into one key holder; the L-shaped key switch and the elongated key switches each has a stepped long plunger and at least one stepped short plungers respectively inserted into the longitudinal center through hole on a respective key holder on the key holder frame; the stepped long plungers of the square key switches and the L-shaped key switch and the elongated key switches each comprises a thicker upper part inserted into the longitudinal center through hole on the respective key holder and suspended above the respective inside annular flange, a thinner lower part passed through the respective inside annular flange and stopped above the respective rubber cone, the thicker upper part being stopped above the respective inside annular flange to stop the at least one stepped short plunger from triggering the membrane circuit when one L-shaped key switch or one elongated key switch is depressed.
REFERENCES:
patent: 4830526 (1989-10-01), Hosono
patent: 5172990 (1992-12-01), Weng
patent: 5209588 (1993-05-01), Chen
IBM Technical Disclosure Bulletin vol. 26 & vol. 27 Dogleg Keybutton Guide Design, S. A. Gaunce and Actuator Key, H. F. Lutz.
Edwards, Jr. Timothy
Hofsass Jeffery
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