Machine element or mechanism – Control lever and linkage systems – Multiple controlled elements
Patent
1974-12-16
1976-10-26
Scott, Samuel
Machine element or mechanism
Control lever and linkage systems
Multiple controlled elements
74198, 340324A, G05G 900
Patent
active
039876853
ABSTRACT:
The invention relates to a position device which rides over a surface for controlling a cursor over a visual display. The device generates signals indicative of its position to cause the cursor to be displayed on the display at a corresponding position. The device includes a control mechanism that comprises a transport sphere coupled with rotatable shafts which represent the position of the device in terms of Cartesian coordinates. The sphere is in contact with the surface over which the device rides and the rotatable shafts contact the sphere at a position on the sphere approximately 90.degree. from the contact loci of the sphere and the surface.
REFERENCES:
patent: 3179755 (1965-04-01), Burnham
patent: 3269190 (1966-08-01), Laman
patent: 3395589 (1968-08-01), Gersten
patent: 3541521 (1970-11-01), Koster
Anderson T. J.
Beck J. E.
Heald Randall
Scott Samuel
Xerox Corporation
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