Spatial input apparatus
March 30, 2007. 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 2996268 3597598 3729129 Acceleration error compensated attitude sensing and control apparatus and method Calculator interface Optical strapdown inertia system Three-axis accelerometer having flexure bearing with overload protection Self-extinguishing polyolefin compositions Apparatus and method for measuring specific force and angular rate Point location and graphics display apparatus InventorsApplicationNo. 07/032305 filed on 03/30/1987US Classes:708/141, Including specific nonkeyboard-type information entry345/157Cursor mark position control deviceExaminersPrimary: Harkcom, Gary V.Assistant: Shaw, Dale M. Attorney, Agent or FirmInternational ClassesG06F 3/033 (20060101)G01P 15/18 (20060101) G01P 15/08 (20060101) AbstractA three-dimensional spatial input apparatus including a series of coplanar, single axis accelerometers configured to provide information on translation along and rotation around a set of orthogonal axes. A preprocessing computer determines the acceleration values output by the accelerometers and converts these values into a series of acceleration, velocity and position values in relation to the axis system, with corrections based on a change in the influence of gravity on the device as it rotates. The values are transmitted to an object control computer which takes appropriate action, including moving a cursor, rotating a displayed object, and controlling remote devices. The spatial input apparatus can have an attached pointer and be used as a three-dimensional digitizer in conjunction with the object control computer.Other References
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