Trackball device

Details Trackball device Trackball device

1990-04-25

1992-01-07

Smith, Gary L.

Machine element or mechanism

Control lever and linkage systems

Multiple controlled elements

340710, 16 26, G09G 100

Patent

active

050780190

ABSTRACT:
A trackball device comprising a housing having a circular opening formed in a top wall thereof, a ball received in the housing and partially projecting through the circular opening, a pair of rotatable members arranged orthogonally to each other and rotatable in accordance with rotation of the ball, detectors capable of detecting the amounts of rotation of the respective rotatable members, and elastic members arranged in the vicinity of the edge of the circular opening and capable of suppressing vibration of the ball.

REFERENCES:
patent: 1265850 (1918-05-01), Wierszewska
patent: 1356566 (1920-10-01), Smith
patent: 3987685 (1976-10-01), Opocensky
patent: 4404865 (1983-09-01), Kim
patent: 4538476 (1985-09-01), Luque
patent: 4562347 (1985-12-01), Hovey et al.
patent: 4575086 (1986-03-01), Kim et al.
patent: 4594586 (1986-06-01), Hosogoe
patent: 4920341 (1990-04-01), Aoki et al.
patent: 4952919 (1990-08-01), Nippoldi
patent: 4996738 (1991-03-01), Tifre

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