Two stage quadrature incremental encoder
October 18, 2009. 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 ReferencesDisplacement measuring device utilizing an incremental code Microprocessor controlled d.c. motor for controlling a load Microprocessor controlled d.c. motor and application therefor Microprocessor controlled d.c. motor for indexing postage value changing means Microprocessor controlled d.c. motor for controlling a postage meter Sheet handling apparatus Microprocessor controlled D.C. motor for controlling print value selection means Microprocessor controlled D.C. motor for controlling tape feeding means Microprocessor controlled d.c. motor for controlling printing means Patent #: 4774446 InventorsAssigneeApplicationNo. 423330 filed on 10/18/1989US Classes:341/13, Optical318/561, Adaptive or optimizing systems including "bang-bang" servos318/603, Pulse-counting systems341/11IncrementalExaminersPrimary: Shoop, William M. Jr.Assistant: Kim, Helen Attorney, Agent or FirmForeign Patent References
International ClassesH03M 001/22G05B 013/00 AbstractAn incremental position encoder and method are disclosed herein for a close loop position control system, for example, for positioning a printing device in an electronic postage meter. The incremental position encoder and method includes three channels, first and second of which provide signals for coarse position determination and first or second and third of which provide signals for fine position determination.Other References
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