Pressure-sensitive resistors
Patent 4163204 Issued on July 31, 1979. Estimated Expiration Date: 
December 26, 1998. 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.
December 26, 1998. 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 2951817 3386067 InventorsAssigneeApplicationNo. 05/973088 filed on 12/26/1978US Classes:338/114, Deformable338/100, Granular338/109, With initial pressure adjustment338/237Hermetically sealedExaminersPrimary: Albritton, C. L.Attorney, Agent or FirmInternational ClassesG01L 9/00 (20060101)H01C 10/00 (20060101) H01C 10/10 (20060101) Foreign Application Priority Data1977-12-30 JPAbstractThe pressure-sensitive resistor comprising an electroconductive elastomer, in which an electroconductive particulate material is dispersed, two electrodes placed on the opposing surfaces of the elastomer, a means for providing a compressive force between the electrodes and a means for adjusting the compressive force, works on a novel principle that the elastomer composite exhibits a positive coefficient in the curve of compression vs. resistance relationship when the compressive force is varied in a region exceeding an inversion point at which the resistance of the elastomer as measured in the direction of compression is minimal. The coefficient in this positive region is smaller than in the ordinary negative region, so that the variable resistance of the resistor can be controlled very delicately together with the decreased contribution of the uncontrollable contact resistance. | |
