Control ball assembly for a coordinate input device

Details Control ball assembly for a coordinate input device Control ball assembly for a coordinate input device

1992-02-26

1994-03-29

Oberley, Alvin E.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

345167, G09G 302

Patent

active

052989160

ABSTRACT:
A control ball assembly for a coordinate input device including a pair of orthogonal rotatable shafts contacting a control ball and which rotate in response to a rotation of the control ball. A spring having two arms, each arm connected to one end of one of the pair of shafts, presses the rotatable shafts inward against the control ball with an equal biasing force. A support member is provided to support the spring.

REFERENCES:
patent: 3269190 (1965-08-01), Laman
patent: 4505165 (1985-03-01), Wiczer
patent: 4520355 (1985-05-01), Mitch
patent: 4533830 (1985-08-01), Beauprey
patent: 4952919 (1990-08-01), Nippoldt

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