Low silhouette keyboard

Details Low silhouette keyboard Low silhouette keyboard

1977-12-12

1980-02-12

Wright, Jr., Ernest T.

Typewriting machines

Key-board or key lever-actuating mechanism

Key lever or space-bar mounting structure

4004402, 400438, 400481, 4004951, B41J 508

Patent

active

041881370

ABSTRACT:
A low silhouette keyboard having a plurality of keylevers arranged in rows and in parallel relationship to one another are suspended, guided and biased to restore by opposing flexible support members. The keylevers are "T" shaped which includes a cross arm constrained between the flexible support members, and a leg portion which projects through slots in a single guide comb. The keylevers are suspended in cantilever fashion being biased upward limited by an upstop. Reciprocation of any keylever in any row is a path substantially perpendicular to the plane of the flexible support members. Keytouch of all keylevers is substantially simultaneous and uniformly adjustable by providing means for varying the upward biasing force applied thereto.

REFERENCES:
patent: 1120726 (1914-12-01), Lorenz
patent: 2209227 (1940-07-01), Helmond
patent: 2890782 (1959-06-01), Stuiber
patent: 3457368 (1969-07-01), Houcke
patent: 3616886 (1971-11-01), Dannatt
patent: 3633723 (1972-01-01), Kosters
patent: 3789970 (1974-02-01), Costa
patent: 3934696 (1976-01-01), Mueller et al.
patent: 3974905 (1976-08-01), Johnson

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