X-Y position input apparatus including preventing dust interfere

Details X-Y position input apparatus including preventing dust interfere X-Y position input apparatus including preventing dust interfere

1987-12-31

1989-11-14

Brigance, Gerald

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340706, 178 18, 74471XY, G09G 100

Patent

active

048810657

ABSTRACT:
An X-Y input apparatus is suitable for a graphic display apparatus and a pattern input apparatus. The X-Y input apparatus includes a rotatable ball, first and second rotating shafts provided in contact with the rotatable ball and orthogonally arranged in an X-Y direction, and a rotatable-angle detector. A stepped-portion is formed on each portion of the first and second rotating members, adjacent to the contacting portion for the rotatable ball. Then, the contamination such as dust is transferred from the rotatable roller to the grooves formed on the first and second rotating members, but is not deposited on the stepped-portion.

REFERENCES:
patent: Re32633 (1988-03-01), Hovey et al.
patent: 3541521 (1970-11-01), Koster
patent: 3613090 (1971-10-01), Mason
patent: 3835464 (1974-09-01), Rider
patent: 3987685 (1976-10-01), Opocensky
patent: 4404865 (1983-07-01), Kim
patent: 4594586 (1986-06-01), Hosogoe
patent: 4628755 (1986-12-01), Hawley

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