Deflection measuring system
Patent 4378693 Issued on April 5, 1983. Estimated Expiration Date: 
February 11, 2001. 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.
February 11, 2001. 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 3114209 Temperature compensated toroidal accelerometer Patent #: 4028815 InventorAssigneeApplicationNo. 06/233645 filed on 02/11/1981US Classes:73/105, Roughness340/689TiltExaminersPrimary: Myracle, Jerry W.Attorney, Agent or FirmInternational ClassG01B 7/16 (20060101)AbstractA system for sensing the deviation of a surface, structure or the like from a reference axis is disclosed. A tilt sensitive transducer is used and this has two impedances the values of which vary differentially according to the angle and direction of tilt of the surface or member to which the transducer is mounted. Two equal but antiphase A.C. voltages are applied, respectively, to the two impedances and the current derived in each impedance is used to generate a D.C. voltage. The two D.C. voltages are compared to derive a difference D.C. voltage the magnitude and sign of which are dependent on the angle and direction, respectively, of tilt. | |
