Keyboard cursor controller
Patent 4670743 Issued on June 2, 1987. Estimated Expiration Date: 
January 31, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 31, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1901673 3266523 3541521 3541541 3665102 3668685 3786689 Digital joystick control Finger control joystick utilizing Hall effect Cursor control device for use with display systems InventorAssigneeApplicationNo. 06/697016 filed on 01/31/1985US Classes:345/157, Cursor mark position control device341/31, Photoelectric actuation341/5, For X or Y coordinate determination (e.g., stylus-pad)345/168, Including keyboard74/471XYControl moves in two planesExaminersPrimary: Brigance, Gerald L.Assistant: Cordell, Ruffin B. Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)AbstractA cursor controller has a handle having first and second perpendicular slots disposed in different parallel planes. A first cross-slide is slidably mounted in the first slot and guides the motion of the handle along an x axis. A second cross-slide is slidably mounted in the second slot and guides the motion of the handle along a y axis. A first encoder strip mounted to the first cross-slide is provided together with a quadrature detector for sensing the direction and magnitude of movement of the handle along the y axis. A second encoder strip mounted to the second cross-slide is provided together with a quadrature detector for sensing the direction and magnitude of movement of the handle along the x axis. Signals from the quadrature detectors are processed and coupled to a computer to provide cursor control on the computer's display screen. An end of travel reset feature restricts movement of the cursor when the handle reaches the end of its travel along an axis, until the handle is withdrawn and once again moved toward the same end of travel position.Other References
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