Class 73/862.339 - With noncontact coupling (e.g., rotary transformer)

Subclass of Class 73 - Measuring and testing
Definition: Subject matter comprising a stationary electrical circuit
No. of patents: 29
Last issue date: 07/08/2008

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Number	Title	Issue Date
7395724	Torque sensor packaging systems and methods A torque sensor packaging system and method includes a torque member that includes one or more holes formed therein for receiving one or more respective fasteners associated with a sensing element. The sensing element can be connected to the torque member to the sen...	07/08/2008
7389162	Aircraft vehicular propulsion system monitoring device and method Methods and systems for monitoring rotating shaft shafts and couplings in an aircraft propulsion system is described. The measurement system/method provides for accurate and precise monitoring of a rotating shaft flexible coupling in a fixed wing aircraft vehicle pr...	06/17/2008
7293466	Bolt with function of measuring strain A bolt with a function of measuring strain, comprising a Wheatstone bridge circuit comprising a strain sensor and a dummy resistor, a translate circuit that amplifies a signal from the Wheatstone bridge circuit to convert the same into a digital signal, a transmitti...	11/13/2007
7155985	Torque sensor for vehicle steering system A torque sensor for a vehicle steering system includes a voltage boosting circuit that boosts a voltage supplied from a power source, an oscillator, a current amplifier, an inverting current amplifier, first and second coils, first and second resistors, a differenti...	01/02/2007
7089808	Torque sensor for vehicle steering system A torque sensor for a vehicle steering system includes a voltage boosting circuit, an oscillator, an offset voltage circuit part and a current amplifier. The torque sensor further includes a phase inversion part that outputs an offset voltage and a phase-inverted al...	08/15/2006
7051601	Torque sensor for vehicle steering system A torque sensor for a vehicle steering system having a power source, an oscillator and an offset voltage circuit part includes a current amplifier, first and second coils that are in series and connected at both ends thereof to output terminals of said current ampli...	05/30/2006
7021161	Gear bearing for a steering wheel position sensor An improved conventional steering wheel position sensor including a housing, a main gear, an auxiliary gear enmeshed with the main gear and a ring shield at the auxiliary gear. A ring shield wall of the ring shield has a low rise portion adjacent the main gear and a...	04/04/2006
6997065	Torque measurement apparatus Torque in a shaft is detected by means of non-contacting sensors sensing a torque-dependent magnetic field emanated by an integral transducer region of the shaft that is circumferentially or longitudinally magnetized. The shaft is driven by a motor and subject to a ...	02/14/2006
6993981	Tension monitoring arrangement and method Tension monitoring is described using a sensor which may exhibit an offset for which compensation may be provided to produce a zero voltage amplified output or to increase dynamic range. An arrangement determines whether a power reset is responsive to a battery boun...	02/07/2006
6957713	Steering angle detection device for electric power steering apparatus In a steering angle detection device for an electric power steering apparatus, a steering wheel shaft rotation angle is derived by calculating a rotation angle signal which corresponds to a rotation angle of a steering wheel shaft within a single rotation, based upo...	10/25/2005
6954685	Aircraft vehicular propulsion system monitoring device and method Methods and systems for monitoring rotating shaft shafts and couplings in an aircraft propulsion system is described. The measurement system/method provides for accurate and precise monitoring of a rotating shaft flexible coupling in a fixed wing aircraft vehicle pr...	10/11/2005
6871553	Integrating fluxgate for magnetostrictive torque sensors A torque sensing apparatus for picking up a magnetic field of a magnetostrictive material disposed on a shaft, the torque sensing apparatus having: a first integrating ring; a second integrating ring; a first fluxgate return strip and a second fluxgate return strip ...	03/29/2005
6826969	Torque measurement apparatus Torque in a shaft (61) is detected by means of non-contacting sensors (23, 24) sensing a torque-dependent magnetic field emanated by an integral transducer region (64, 32) of the shaft (61) that is circumferentially or longitudinally magn...	12/07/2004
6807871	Torque detector Disclosed herein is a torque detector. The torque includes a synchronous detector, a bridge circuit and a signal converter. The synchronous detector detects an AC voltage signal having a preset DC voltage level and a certain frequency, and generates a detection outp...	10/26/2004
6601462	Capacitive torque sensor and method of detecting torque A dielectric layer 32 variable in dielectric constant in dependence upon the strain is formed on at least a part of an outer peripheral surface of a bar 31 having a circular cross section. Interdigital electrodes are faced to the dielectric layer to there...	08/05/2003
5442956	Torque sensor for a power assist steering system A torque sensor is presented for use in a power assist steering system for sensing the applied steering torque between an input shaft and an output shaft and wherein the shafts are coaxially aligned and rotatable relative to each other about a common axis...	08/22/1995
4977782	Device for measuring the torque of a valve moved by an actuator In order to measure torques on valves, measuring devices have heretofore been used which measure the force to be transmitted with the aid of weighing cells fitted with strain gauges. The structural make-up of such devices and the structural size resulting...	12/18/1990
4763533	Method and device for measuring the deformation of a rotating shaft The method and apparatus for deriving a calibrated deformation signal from a signal produced by a strain gauge bridge on a rotating shaft involves further strain gauge bridges, one approximating the deformation bridge signal in the absence of torque and a...	08/16/1988
4741217	Magnetic field coupling circuit and rotary transducer using same An improved electromagnetic coupling circuit (16) is provided that features a rotor (18) carrying rotary windings (39) rotated by a rotary member (2) within an annular air gap (41) between two magnetic stator sections (34, 34') in which are disposed stato...	05/03/1988
4656875	Method and device for measuring the deformation of a rotating shaft The method and apparatus for deriving a calibrated deformation signal from a signal produced by a strain gauge bridge on a rotating shaft involves two further strain gauge bridges, one which approximates the deformation bridge signal in the absence of tor...	04/14/1987
4649758	Torque sensing apparatus A rotary shaft (13) is fitted with strain gauges (17) in a bridge formation arranged to give a response to torque. Windings (18a, 19a) surround the shaft at axially spaced zones and rotate with it, co-operating with fixed windings (18b, 19b) providing tra...	03/17/1987
4627296	Shunt calibration system for a transducer mounted on a rotating member A rotary transformer transducer system includes a rotatable shaft having a rotor and a transducer each mounted thereon, and a stationary member including a stator, with the rotor and stator coupling electrical energy therebetween without physical contact....	12/09/1986
4610168	Variable magnetic field coupling circuit and rotary transducer using same An improved rotary transducer (60) featuring a rotary member (2) rotatably mounted in a housing (4). Member (2) is preferably provided with a section (8) adapted to enhance measurement of stresses or other parameters of interest imposed upon member (2) un...	09/09/1986
4567377	Mechanical switching means for providing shunt calibration in a rotary transformer system A system for calibrating a strain gage transducer mounted on a rotating member comprising a mechanical switch capable of making contact from a stator to selected terminals on the rotor to provide both positive and negative shunt calibration of the transdu...	01/28/1986
4496286	Control system for engine-driven compressor unit and method of operation thereof A control system for a compressor unit driven by a clean-burn, turbo-charged, gas-fueled engine which is primarily responsive to the load (torque) and the speed of the engine to adjust certain engine parameters to maintain the operating conditions of the ...	01/29/1985
4471663	Drilling torquemeter The present invention is a torquemeter for measuring the torque applied during drilling operations. The torquemeter is of generally flat annular form and adapted to be positioned in the drive train around a Kelly and between the rotary table and the Kelly...	09/18/1984
4232922	Signal power coupling to rotary shaft A system for coupling electrical power to a rotary shaft without mechanically contacting the shaft includes a stationary transformer primary core positioned adjacent but spaced from the shaft so that the shaft forms part of a complete magnetic flex path f...	11/11/1980
4059005	Rotary transformer shunt calibration A rotary transformer transducer system includes a rotatable shaft having a rotor and a transducer each mounted thereon, and a stationary member including a stator, with the rotor and stator coupling electrical energy therebetween without physical contact....	11/22/1977
3961526	Rotary torquemeter A rotary torquemeter utilizing a rotary transformer means in conjunction with a strain gauge for indicating torque being transmitted through a drive means. The use of the rotary transformer permits the detection of the torque without mechanical coupling t...	06/08/1976

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Class 73/862.339 - With noncontact coupling (e.g., rotary transformer)