Gyroscopic pointer
Patent 5440326 Issued on August 8, 1995. Estimated Expiration Date: 
January 5, 2013. 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 5, 2013. 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 ReferencesMethod and apparatus for providing two dimensional positioning data signals Accelerometer system Marking device for use with inductive measuring sensor Attitude and heading reference detecting apparatus Spatial input apparatus Patent #: 4839838 InventorAssigneeApplicationNo. 000651 filed on 01/05/1993US Classes:345/156, DISPLAY PERIPHERAL INTERFACE INPUT DEVICE345/157, Cursor mark position control device701/220Using inertial sensorExaminersPrimary: Weldon, UlyssesAssistant: Luu, Matthew Attorney, Agent or FirmInternational ClassG09G 003/02AbstractA vertical gyroscope is adapted for use as a pointing device for controlling the position of a cursor on the display of a computer. A motor at the core of the gyroscope is suspended by two pairs of orthogonal gimbals from a hand-held controller device and nominally oriented with its spin axis vertical by a pendulous device. Electro-optical shaft angle encoders sense the orientation of a hand-held controller device as it is manipulated by a user and the resulting electrical output is converted into a format usable by a computer to control the movement of a cursor on the screen of the computer display. For additional ease of use, the bottom of the controller is rounded so that the controller can be pointing while sitting on a surface. A third input is provided by providing a horizontal gyroscope within the pointing device. The third rotational signal can be used to either rotate a displayed object or to display or simulate a third dimension.Other References
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