Typewriting machines – Key-board or key lever-actuating mechanism – Key-board including keys grouped to facilitate positioning...
Patent
1989-07-07
1991-11-26
Crowder, Clifford D.
Typewriting machines
Key-board or key lever-actuating mechanism
Key-board including keys grouped to facilitate positioning...
400 82, 400472, B41J 510
Patent
active
050678345
ABSTRACT:
An input keyboard unit includes a left and right keyboard. A separate universal pivot support unit is secured one to each keyboard and to a base support plate. Each universal pivot unit includes a telescopic shaft with a releasable connector for holding of the shaft in desired extended position. One end of the shaft or post unit is secured to the keyboard through a mounting plate. A ball and socket unit is secured to the opposite end and through a tongue and groove connection to a base plate for lateral positioning of the pivot units and the attached keyboard relative to each other. The ball and socket unit allows universal pivoting of the keyboard about the mounting to the base plate and thereby permits the optimal positioning of the keyboard with respect to the hands of the operator. In one embodiment, the two separate keyboard boards are generally rectangular members. A universal pivot units interconnects the top inner corners of the two keyboards whereby a generally inverted V-shaped spacing is provided between the two keyboards with each keyboard having a front-to-back inclination and a lateral side inclination with the universal pivot units of the keyboards permitting the precise optimal setting for any given individual or group of individuals. The keyboard connecting pivot unit is releasable to allow lateral spacing of the keyboards where desired or necessary for any given individual.
REFERENCES:
patent: 3990565 (1976-11-01), Felton et al.
patent: 4378553 (1983-03-01), McCall
patent: 4402624 (1983-09-01), Stahl et al.
patent: 4597681 (1986-07-01), Hodges
patent: 4661005 (1987-04-01), Lahr
Article entitled "Multifinger Tapping Performance as a Function of the Direction of Tapping Movements" by Lyle R. Creamer and Don A. Trumbo.
Article entitled: "Keyboard Design and Operation: A Review of the Major Issues" by D. G. Alden, R. W. Daniels and A. F. Kanarick.
Szmanda Jeffrey P.
Szmanda William J.
Crowder Clifford D.
Yan Ren
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