Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1999-02-19
1999-09-14
Shankar, Vijay
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345165, 345166, G09G 508
Patent
active
059529970
ABSTRACT:
An encoder wheel arrangement, which includes a rack mounted on a circuit board, a positioning block supported on spring elements in the rack, an operation wheel supported on the positioning block and turned by hand to rotate a shaft and a notched disk relative to a photoelectric transmitter and a photoelectric receiver on the circuit board, the operation wheel having a plurality of axial grooves equiangularly spaced around its inside wall and turned with the operation wheel to alternatively pass over two opposite ends of the positioning block of the rack for quick positioning at one of a series of angular positions.
REFERENCES:
patent: 5168268 (1992-12-01), Levy
patent: 5252968 (1993-10-01), Donovan
patent: 5386460 (1995-01-01), Tseng
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