Class 73/1.11 - Electrical

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein either (a) the apparatus for proving
No. of patents: 37
Last issue date: 09/27/2011

Number	Title	Issue Date
8024956	Angle measurement system An angular position measurement system including a continuous angular position sensor configured to provide a first signal representative of a continuous angular position of a rotating shaft, an incremental angular position sensor configured to provide a second sign...	09/27/2011
7287439	Apparatus for measuring torque of a torque tool by using an indirect structure The invention provides an apparatus for measuring torque of a torque tool by using an indirect structure arranged on one side of the torque tool, in which the apparatus comprises a microstructure part connected with a side surface of the torque tool. The microstruct...	10/30/2007
7177106	Disk storage apparatus A disk storage apparatus including a position detection section for producing position error information corresponding to the current position of a head from servo information which has been previously recorded on a disk and is detected by the head, a position contr...	02/13/2007
7093477	Torque sensor for calibrating screwing tools The invention relates to a torque sensor for calibrating screwing tools such as dynamometric keys or impact screw drivers. A torque sensor for calibrating screwing tools has an inner body defining an axis with respect to which a torque is to be measured. The inner b...	08/22/2006
7092196	Characteristic measurement of an actuation drive coil and associated damping mechanism A system and method for analyzing a coil actuator of a type having a coil and a magnet. A current source selectively applies a first current to a coil of a coil actuator for setting a moveable part of the coil actuator to a first position. A recording system capture...	08/15/2006
6988027	Electric power steering system In an electric power steering system, during initial processing after an ignition switch is turned on, when a main CPU completes calculation of an offset voltage, it sends an offset voltage calculation request signal to a sub CPU. When the time from sending the offs...	01/17/2006
6969006	Rotable portable card having a data storage device, apparatus and method for using same A portable card adapted to be used in a card processing system having a data processing station is shown. The portable card includes a data storage device which is adapted to interact with a data processing station when a portable card and a data processing station ...	11/29/2005
6965835	Torque angle sensing system and method with angle indication A device used for measuring the angle of torque beyond a specific reference point. The device is comprised of a tool that applies torque to a fastener, an adapter that is attached to the fastener to transfer the torque from the tool, and an apparatus that connects a...	11/15/2005
6646446	Method and apparatus for fault detection in a resistive bridge sensor A full Wheatstone bridge sensor has conditioning electronics of an ASIC connected thereto. Two independently controlled diagnostic switches (S1, S2) in the ASIC are commonly connected to one of the bridge output nodes. The first diagnostic switch connects...	11/11/2003
6609407	Test apparatus for a wrench used to test previously tightened fasteners A test apparatus includes a torque sensor that outputs an indication of torque when rotated by a tool to be tested, and an angle potentiometer that outputs an indication of the rotation angle. A rotatable arm is connected to the torque sensor. A stop prev...	08/26/2003
6467329	Neutral point voltage adjuster of torque sensor The present invention provides a neutral point voltage adjuster of a torque sensor which comprises: a pair of coils having inductances changing mutually in a reverse direction in accordance with a torque; and a differential amplifier means inputting first...	10/22/2002
6196047	Method and system to measure torque per unit current as a function of angle in hard disk drive actuators A method and apparatus for calculating a torque constant, Kt, of an actuator for a computer disk drive by passing the actuator through a magnetic field and measuring the induced change in potential. A stepper motor moves the coil through a magn...	03/06/2001
5426986	Absorption dynamometer torque measuring device and calibration method The invention is an in-line torque meter for use with an absorption dynamometer in which the twist of a rotating shaft that transmits torque from an engine to an air dynamometer is measured by a single sensor on the adjacent stationary structure. The torq...	06/27/1995
5406834	Torque sensor In a torque sensor, an oscillating voltage from an oscillator is applied to a torque detecting coil and a temperature compensating coil, and voltages from the torque detecting coil and the temperature compensating coil are input to a differential amplifie...	04/18/1995
5181425	Apparatus and method for testing torque wrenches Torque wrench testing apparatus and method that includes holding a torque wrench, applying a predetermined torque load to one end of the wrench while limiting movement of the other end of the wrench, and measuring the actual torque applied, for comparison...	01/26/1993
5099678	Torque tool calibrating machine A Torque Tool Calibrating Machine comprising an elongate torque tool engaging transducer including a strain gauge and mounted on a turning axis; an electronic analyzer connected with the gauge and operating to analyze, translate and display the voltage dr...	03/31/1992
4976133	Instrument for adjusting and calibrating torque wrenches The electric circuit of the torque indicator in a torque wrench is automatically adjusted by the electric circuit of a detachable adjusting and calibrating instrument which is separably connectable to the wrench so that its torsion bar is deformable by th...	12/11/1990
4899596	Self-calibrating torque measuring system A universal torque measuring system for hollow drive shafts which automatically compensates for variations in wall thickness exhibited by different drive shafts having the same nominal dimensions. During a calibration procedure, the drive shaft is subject...	02/13/1990
4864841	Electronic torque wrench An electronic torque wrench equipped with at least two strain gages placed on both sides of a crosswise plane on a part forming a sensor and each supplying an output voltage, C1 and C2 respectively, which, depending on torque C appli...	09/12/1989
4790175	Method and apparatus for calibrating a transducer having real and reactive impedance Method and apparatus for calibrating a transducer having real and reactive impedance, which is excited from an excitation source and which provides an output signal connected by an electrical conductor to a remote load. A preamplifier is provided having a...	12/13/1988
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
4759225	Torque tool and torque tool analyzer A combination torque tool and torque tool analyzer that includes a housing and a portable tool that can be mounted on the housing. The housing has a control panel with indicator lights and control buttons on an upper surface thereof and contains inside it...	07/26/1988
4697459	Torque measuring apparatus A torque measuring apparatus for detecting torque in a noncontacting state on the basis of the magnetostrictive amount of a rotary magnetic member for transmitting the torque which is detected by means of a magnetic sensor. The measuring apparatus compris...	10/06/1987
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
4649757	Device for calibrating a machine tool Device for calibrating a machine tool including a tool (32) rotating about its axis XX', comprising a tubular-shaped support with an annular fixing component (3) connecting it to the housing (1) of the machine tool so that its central opening forms an ext...	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
4583411	Dynamic torque monitoring device A method and apparatus for dynamically testing a rotational torque producing device (22) during calibration under conditions simulating actual operating conditions. The torque produced by the torque producing device under controlled (28) load conditions s...	04/22/1986
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
4562722	Impact wrench torque calibrator A torque calibrator allowing the accurate calibration of impact type wrenches. The calibrator measures the displacement of a heavy fixed beam in its natural oscillation mode. The beam has a long period of natural oscillation and an elastically soft segmen...	01/07/1986
4558601	Digital indicating torque wrench A digital indicating torque wrench comprising a shaft having a high modulus of elasticity and including a handle at one end, and an elongate actuating arm including a free end which moves with respect to the shaft in response to the application of torque ...	12/17/1985
4543814	Device for calibrating torque transducers A calibration stand for electrical torque transducers capable of applying torque loads on the order of 300,000 inch-pounds (33,900 newton-meters) has deadweight loading applied through a thin flat high carbon steel hangar strap. The hangar strap contacts ...	10/01/1985
4517821	Automatic torque wrench tester An automatic torque wrench testing machine uses a strain-gauge transducer to develop signals corresponding to the torque applied to the wrench. The machine is driven by pneumatic/hydraulic drive under the control of a microprocessor. Torque is initially a...	05/21/1985
4498336	Torque measuring device A torque measuring device is provided for use in conjunction with a valve actuator of the type having a housing and an actuator member movable within the housing in unison with the opening and closure of a valve. The device comprises a mounting plate whic...	02/12/1985
4483177	Transducer calibration verification fixture for multiple spindle torque units A transducer calibrating and testing assembly is provided for calibrating the spindle transducers in a multiple spindle machine tool without the need for completely dismantling the machine to perform the calibration operation. The transducer calibrating a...	11/20/1984
4470312	Torque measuring device A torque measuring device has a torsion bar with effective length adjustable to show different energy absorption capability. One end of the torsion bar's effective length is held stationary while a torque from a torque controlled winding tool is applied t...	09/11/1984
4253325	Calibration of torque measuring transducers A transducer calibrating assembly for calibrating the spindle transducers in a multiple spindle machine tool without the need for completely dismantling the machine to perform the calibration operation. The transducer calibrating assembly includes a torqu...	03/03/1981
4150559	Variable rate test joint A device for simulating the tightening rate of a threaded fastener and for varying the joint rate. The torque applied to the joint is determined. The device is suitable for determining the torque scatter of the torque applied to the simulated joint by mea...	04/24/1979

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Class 73/1.11 - Electrical