Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1982-07-19
1984-08-07
Brigance, Gerald L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340709, 340716, 74471XY, G09G 100
Patent
active
044646526
ABSTRACT:
A cursor control device having particular application to a computer display system is disclosed. The cursor control includes a unitary frame, having a domed portion substantially surrounding and retaining a ball which is free to rotate. X-Y position indicating means are provided, such that rotation of the ball provides signals indicative of X-Y positions on the display system. The ball is free to "float" in the vertical direction within the dome, and thereby maintain good surface contact. X-Y positions are established by movement of the control device over a surface. A display system and method is disclosed for use in conjunction with the cursor control device, which permits a user to select command options simply by movement of the displayed cursor over a "pull-down" menu bar.
REFERENCES:
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patent: 3541541 (1970-11-01), Engelbart
patent: 3625083 (1971-12-01), Bosc
patent: 3835464 (1974-09-01), Rider
patent: 3987685 (1976-10-01), Opocensky
patent: 4245244 (1981-01-01), Lijewski et al.
patent: 4310839 (1982-01-01), Schwerdt
patent: 4369439 (1983-01-01), Broos
patent: 4404865 (1983-09-01), Kim
Atkinson William D.
Lapson William F.
Apple Computer Inc.
Brigance Gerald L.
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