Surface-area pressure transducer and line-selection circuit for use therewith
Patent 4644801 Issued on February 24, 1987. Estimated Expiration Date: 
August 21, 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.
August 21, 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 3565195 Apparatus for the time-dependent measurement of physical quantities Matrix screening and grounding arrangement and method Force sensing means and method of producing such sensing means Conformable tactile sensor Layered capacitive sensor for detecting loads and load variations thereon Patent #: 4581677 InventorAssigneeApplicationNo. 06/767891 filed on 08/21/1985US Classes:73/862.046, Transducer array (e.g., columns and rows)361/283.1, Pressure73/172, ORTHOPEDIC PRESSURE DISTRIBUTION73/862.626Inductance or capacitance sensorExaminersPrimary: Ruehl, Charles A.International ClassG01L 1/14 (20060101)Foreign Application Priority Data1984-08-21 ILAbstractA surface-area-pressure transducer comprises: at least one pair of electrode layers each including a plurality of electrically-conductive elements, the elements of one layer extending in spaced, crossing relationship to the elements of the other layer; and a compressively-deformable dielectric layer composed of fibers interposed between the two electrode layers to define therewith an array of capacitors whose capacitances are changed by the compression of said dielectric layer when subjected to pressure. Also described is a line-selector circuit for individually selecting each capacitor for measurement without electrical cross-talk from the other capacitors. | |
