Pressure sensing device
Patent 4821013 Issued on April 11, 1989. Estimated Expiration Date: 
November 24, 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.
November 24, 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 3386067 Method and unit for inspecting printed wiring boards Linear potentiometer Patent #: 4651123 InventorAssigneeApplicationNo. 07/124977 filed on 11/24/1987US Classes:338/114, Deformable338/99Surfaces pressed together (e.g., compressible type)ExaminersPrimary: Shaw, Clifford C.Assistant: Lateef, M. M. Attorney, Agent or FirmInternational ClassesG01L 1/20 (20060101)H01C 10/10 (20060101) H01C 10/00 (20060101) AbstractA pressure sensing device constructed of a high molecular conductor kept in contact at all times with at least one pair of electrodes in a circuit and wherein the resistance of the conductor is sensitive to external forces oppositely applied by an actuator and a spring. Changing of the relative value of the forces changes the conductor resistance thus changing the circuit resistance. | |
