X-Y Positions input device for display system

Details X-Y Positions input device for display system X-Y Positions input device for display system

1984-03-08

1985-12-31

Pellinen, A. D.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

74471XY, 340710, H01H 900

Patent

active

045623147

ABSTRACT:
An X-Y input device comprises a rotatable ball, a first driven roller held in contact with the rotatable ball and rotatable in response to rotation of the rotatable ball, a second driven roller held in contact with the rotatable ball and rotatable in response to rotation of the rotatable ball, the second driven roller having an axis of rotation extending substantially perpendicularly to that of the first driven roller, first rotation detector means for detecting an amount of rotation of the first driven roller, and second rotation detector means for detecting an amount of rotation of the second driven roller. Each of the rotation detector means comprises a pattern base plate including a central pattern and a peripheral pattern concentric with the central pattern, a slider having a first contact end held in slidable contact with the central pattern and a second contact end held in slidable contact with the peripheral pattern, and a slider support supporting the slider and connected to each of the driven rollers for rotation. The first contact end of the slider is held in contact with the central pattern at a point aligned with a central axis of rotation of the driven roller, or the central pattern of the pattern base plate has a center aligned with a central axis of rotation of the driven roller.

REFERENCES:
patent: 3541541 (1970-11-01), Engelbart

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