Keyball

Details Keyball Keyball

1998-07-31

2000-04-25

Burr, Edgar

Typewriting machines

Plural-key-actuated typewriter

400472, 400485, 347 22, B41J 506

Patent

active

060536462

ABSTRACT:
An input device for inputting data into a computer or a video game is provided. The input device includes two keyballs mounted to a base. The keyballs may be swiveled relative to the base. Each keyball includes a plurality of switches for activation by the finger tips and thumb tips of a typist. By moving the keyballs and pressing the switches, the typist can enter data in a manner which mimics a conventional typing method. During operation, the typist's hands need not leave the keyballs. Therefore, the input device can reduce strains, and the likelihood of injuries such as carpal tunnel syndrome, to the wrists of the typist.

REFERENCES:
patent: 3022878 (1962-02-01), Etal
patent: 4655621 (1987-04-01), Holden
patent: 5311210 (1994-05-01), O'Brien et al.
patent: 5486058 (1996-01-01), Allen
patent: 5541593 (1996-07-01), Arsem
patent: 5716149 (1998-02-01), Mensick
patent: 5735619 (1998-04-01), Myint

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