Computer trackball

Details Computer trackball Computer trackball

1995-11-08

1997-04-15

Chiu, Raleigh W.

Amusement devices: games

Including means for processing electronic data

Player-actuated control structure

345167, 345168, G09G 500

Patent

active

056203713

ABSTRACT:
A computer trackball comprises a transparent outer sphere inside of which is disposed a second inner sphere. The outer diameter of the inner sphere is a little bit smaller than the inner diameter of the outer sphere. Disposed on the outer surface of the inner sphere, at one "end" thereof is a logo or other graphical image. The inner sphere tends to maintain itself in a predetermined orientation--e.g., with the graphical image pointing directly "up" relative to the keyboard or other housing fin which the trackball is held--notwithstanding rotation of the outer sphere by a user in the course of operating the trackball.

REFERENCES:
patent: 2351762 (1944-06-01), Hoover
patent: 3655197 (1972-04-01), Milbaum
patent: 4404865 (1983-09-01), Kim
patent: 5078019 (1992-01-01), Aoki
patent: 5288993 (1994-02-01), Bidiville et al.
patent: 5381159 (1995-01-01), Oohori

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