Manual control device
Patent 4673919 Issued on June 16, 1987. Estimated Expiration Date: 
July 18, 2004. 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.
July 18, 2004. 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 ReferencesCursor control Assisted manual designation system for an optical or optronic radar director theodolite device Patent #: 4367436 InventorApplicationNo. 06/632034 filed on 07/18/1984US Classes:341/11, Incremental200/56R, Indicating instrument327/517, Responsive to proximity or touch341/29, With variable pulse spacing or grouping341/34, Pressure sensitive actuation345/173, Touch panel377/55Particular input circuitExaminersPrimary: Rowland, James L.Assistant: Rittmaster, Ted Attorney, Agent or FirmInternational ClassesG01L 5/22 (20060101)G05B 15/02 (20060101) Foreign Application Priority Data1983-08-10 JPAbstractImprovements in a manual control device wherein an incremental touch key or a decremental touch key is depressed by hand so as to bring a manipulated value and a set value into agreement. The manual control device comprises a pressure sensor which converts a contact pressure of a hand into a voltage level which is proportional to the pressure, a level encoder which delivers a pulse at any one of a plurality of different frequencies to a counter in correspondence with the output of the pressure sensor, a D/A converter which converts a digital output of the counter into an analog output, and an output driver which controls a base current of a transistor for driving a manipulated-value indicator, by the A.C. output of the D/A converter.Other References
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