Flux control groove
January 24, 2014. 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 2832932 Force balancing assembly for transducers Eddy-current device for measuring rotational speed Movable element with position sensing means for transducers Method of making force transducer flexure Force transducer flexure with conductors on surfaces in the neutral bending plane Force transducer flexure with conductors on surfaces in the neutral bending plane Flexure with electrical conductor Method and apparatus for producing a controlled preload on a transducer assembly Method and apparatus for producing a controlled preload on a transducer assembly by means of a composite material sleeve InventorAssigneeApplicationNo. 186057 filed on 01/24/1994US Classes:73/514.23, Including a flexure support73/514.31Inductive or magnetic sensor (e.g., Hall effect sensor)ExaminersPrimary: Williams, HezronAssistant: Oda, Christine K. International ClassG01P 015/13AbstractA force rebalance accelerometer includes a proof mass suspended by one or more flexures between stationary mounted upper and lower excitation rings. Pick-off capacitance plates formed on opposing sides of the proof mass are used to form upper and lower capacitance elements whose capacitance varies in response to displacement of the proof mass to provide a displacement signal. The displacement signal is applied to one or more electromagnets which are used to force the proof mass back to a null or at-rest position. The drive current applied to the electromagnets thus represents the force or acceleration applied to the accelerometer. The electromagnets include a magnet, rigidly secured to an excitation ring which forms a magnetic return path. A flux control groove is formed in the excitation ring to reduce leakage flux and flux concentration which would otherwise result in the magnetic return path at the magnet interface. By relieving the stress and leakage flux at the magnet interface, the accelerometer in accordance with the present invention will provide relatively stable output signals and not be particularly sensitive to temperature or environmental variations while providing relatively stable thermal hysteresis and drift performance.Field of SearchTemperature compensatorStructural installation or mounting means Magnetic speed measuring or mechanical speed measuring with ancillary magnetic means or with ancillary electrical means Eddy current drag means (e.g., drag cup) Rebalance Including a flexure support Inductive or magnetic sensor (e.g., Hall effect sensor) WITH CONDITION-RESPONSIVE INDUCTANCE ADJUSTING MEANS (E.G., BY ELECTROMAGNET) With flux leakage-reducing means Magnet structure or material Drag magnet Permanent magnet core Condition responsive (e.g., position, torque, etc.) | |
