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| Number | Title | Issue Date |
| 7257506 | Position detecting system and method A position detection system for locating an object including a magnetic field generator is disclosed. The position detection system also includes an array of parallel conductors responsive to a magnetic field generated by the magnetic field generator and a plurality... | 08/14/2007 |
| 7196604 | Sensing apparatus and method There is described a position sensor comprising at least one planar substrate having formed thereon a magnetic field generator which comprises conductive tracks formed on at least two planes defined by the at least one planar substrate. An intermediate coupling elem... | 03/27/2007 |
| 7164384 | Combination biometric and/or magnetic sensing functionalities and/or GPS with radio frequency transponder functionality on an intelligent label A intelligent label comprising a radio frequency transponder coupled to a global positioning system, a magnetic field sensing system, and/or a fingerprint sensor system, all of which are attached to a substrate. Once the intelligent label utilizing a global position... | 01/16/2007 |
| 7111912 | Control handle with spiral position sensor and integral switches A control handle for electro-mechanical devices, such as the brakes of a train or other vehicle, is disclosed. The control handle incorporates elements for electrical switching as well as elements for measuring the angle of rotation between the control handle's rota... | 09/26/2006 |
| 7067972 | Electroluminescence light emitting steel An EL emitting sheet realizing various changes of light emission. The EL emitting sheet includes: a light-emitting layer containing electroluminescence light-emitting elements therein; and an electrode section having a plurality of electrode pairs which is disposed ... | 06/27/2006 |
| 7047150 | Method for determining a rotor position of a synchronous motor In a method for determining the rotor position of a synchronous motor, a plurality of current vectors having different directions is applied to the synchronous motor. Absolute values of required ones of the current vectors are determined to obtain a defined excursio... | 05/16/2006 |
| 7019672 | Position sensor A low cost x-y digitising system is described for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitizer includes a resonant stylus, an excitation winding for energising the resonant stylu... | 03/28/2006 |
| 7016744 | Man-machine interface A man-machine interface is provided for a domestic appliance in which remotely sensed buttons, slider bars, marker pucks and a knob are used. The sensing coils for remotely sensing the positions of the buttons, slider bars, marker pucks and the knob are formed on a ... | 03/21/2006 |
| 6999007 | Linear position sensor In a linear position encoder, a support is provided upon which a pair of phase quadrature windings are mounted. The windings are arranged to have a sinusoidal magnetic sensitivity characteristic along the length of the support. Mounted on a movable element there is ... | 02/14/2006 |
| 6980134 | Signal processing apparatus and method Processing circuitry is provided for processing signals received from, for example, sense coils forming part of a position encoder used to encode the relative positions of two relatively movable members. The position encoder is such that each of the plurality of sig... | 12/27/2005 |
| 6952086 | Linear position sensing system and coil switching methods for closed-loop control of large linear induction motor systems A control system for a linear motor adapted to accurately supply a moving window of power to the stator coils. A plurality of individually switched stator coils run the length of a linear motor to move a rotor down the long axis of the stator. Accurate inductive-bas... | 10/04/2005 |
| 6788221 | Signal processing apparatus and method Processing circuitry is provided for processing signals received from, for example, sense coils forming part of a position encoder used to encode the relative positions of two relatively moveable members. The position encoder is such that each of the plurality of si... | 09/07/2004 |
| 6703943 | Assembly for signal transfer between a receiving station and a transmitting station as well as for power supply of the transmitting station In an assembly for signal transfer between a receiving station and a transmitting station and for power supply of the transmitting station where these two stations are connected via a two-wire line, an analog signal current variable between two limiting v... | 03/09/2004 |
| 6249234 | Position detector A position detector is provided for detecting the relative movement of first and second members which are mounted for relative movement along a measuring path. One of the members comprises a magnetic field generator for generating a magnetic field and the... | 06/19/2001 |
| 5815091 | Position encoder In a linear position encoder, a support is provided upon which a pair of phase quadrature windings are mounted. The windings are arranged to have a sinusoidal magnetic sensitivity characteristic along the length of the support. Mounted on a movable elemen... | 09/29/1998 |
| 5304909 | Resolver excitation signal generating apparatus The present invention relates to a resolver excitation signal generating apparatus for supplying a reference excitation signal to a resolver attached to a motor for driving a robot or a computer numerical control machine. When a sine-wave signal is transf... | 04/19/1994 |
| 5196776 | Waveform generator for a resolver A waveform generator for a resolver transducer or the like is described. Such generator forms two 3-level waveforms which approximate sinusoidal waveforms for the excitation and/or output detection of such a resolver. Each of the sinusoidal waveforms is f... | 03/23/1993 |
| 4994799 | System for the electrical transmission of an angular position In a system for the electrical transmission of an angular position, in particular from a measurement instrument to an indicating instrument, in which a transmitter and a receiver each have a rotor and a stator which has multiple pairs of poles, an alterna... | 02/19/1991 |
| 4906909 | Analog electronic control differential transmitter A linear, analog, synchro control differential transmitter for implementing he common synchro CDX function whereby a scaled linear analog voltage is used as input instead of a mechanical shaft angular displacement. Alternate synchro functions of CT and CX ... | 03/06/1990 |
| 4796188 | Phase rotation of signals Phase rotation of an input digital signal is effected by applying the input signal to a look-up table in a memory together with a rotation control signal. The output of the memory is the phase rotated signal. To reduce the size of the PROM required for th... | 01/03/1989 |
| 4712106 | Phase analog encoding system with compensation A phase analog encoding system with compensation for the phase shift error inherent in a resolver position transducer. The inherent phase shift error in a resolver position transducer is compensated independent of a resolver position in a time multiplexed... | 12/08/1987 |
| 4710770 | Phase modulation type digital position detector A digital mode phase modulation type position detector utilizing a resolver as the phase modulating element is disclosed in which the phase of the modulated signal is determined by comparing it with that of the follower signal, the phase of which is adjus... | 12/01/1987 |
| 4598289 | Control device for a synchro receiver A control device suitable for synchros comprising three stator windings. The device comprises four circuit branches with the inputs of the first and the second branches interconnected to receive a first voltage from the ends of the stator windings of the ... | 07/01/1986 |
| 4486845 | Resolver to incremental shaft encoder converter A circuit for duplicating the function of an incremental shaft encoder comprises a rugged resolver connected to a hybrid digital-analog circuit which generates output signals identical to those of a counterpart incremental encoder. The digital portion of ... | 12/04/1984 |
| 4475105 | System for detecting mechanical movement A system for detecting mechanical movement of a body under detection comprises: a synchro generator having multiple-phase primary windings and a secondary winding, either of the primary windings or the secondary winding capable of being coupled to the bod... | 10/02/1984 |
| 4472669 | Compensated resolver feedback A method and apparatus by which the output value of a resolver position detection system is compensated for systematic phase shift errors produced by signal conditioning circuitry through which the signal passes.... | 09/18/1984 |
| 4360889 | Rotary position indicating circuit A circuit for indicating angular position of a rotary member comprising a resolver including an amplitude stabilized sine-cosine generator coupled to quadrature windings of the resolver for providing a d.c. signal which varies as a linear function of the ... | 11/23/1982 |
| 4349822 | Inductive potentiometer An inductive potentiometer for supplying a d.c. output voltage, which is linearly variable as a function of the rotation angle of a spindle. The potentiometer is constituted by a synchro-resolver and two associated circuits, an a.c. voltage supply circuit... | 09/14/1982 |
| 4334179 | Apparatus for demodulating a pulse excited synchro position sensor In a device having a synchro resolver and a microprocessor, the apparatus of the present invention utilizes a pulse excitation technique for converting a synchro output signal to a digital format. A pulsed waveform is selectively applied to the input wind... | 06/08/1982 |
| 4327363 | System for transmitting heading information from a compass to several followers A synchro transmitter having a rotor driven by a compass communicates the heading information from that compass to a plurality of loads via respective synchro receivers whose rotors are energized with direct current or carry permanent magnets and whose st... | 04/27/1982 |
| 4316189 | Electromechanical display apparatus A display apparatus provides a three-dimensional pictorial representation of the position of a movable first member in relation to a stationary second member for the purpose of remotely positioning the first member to enable docking with the second member... | 02/16/1982 |
| 4268819 | Synchro motor type instrument A synchro receiver of the instrument according to this invention has a stator upon which a three-phase winding is wound and a rotor which forms a flat plate and has two magnetic poles made of high permeability material without an exciting winding thereby ... | 05/19/1981 |
| 4253051 | Phase locked loop having electrical zeroing In apparatus for measuring the relative position between a fixed member and a movable member, as in a flight simulator, means for electrically offsetting the position measurement to compensate for mechanical offsets and the like. The relative position may... | 02/24/1981 |
| 4193059 | Attitude indicator comparator warning system The indications of attitude indicators at two different indicating locations that are indicating the same parameter but actuated from different sources, are monitored for the same indication by electrically interconnecting two transolvers that are mechani... | 03/11/1980 |
| 4157536 | Synchronous transmission device of the vernier resolver type incorporating compensation of parasitic coupling A synchronous transmission device of the vernier resolver type, in which a variable reluctance is produced by the rotation of an unwound magnetic rotor, wherein unwanted inductive and capacitive coupling effects between windings, resulting in parasitic si... | 06/05/1979 |
| 4138661 | Attitude indicator having expanded scale A roll and pitch servomechanism for use in an attitude indicator is shown having an expanded scale in which a nonlinear electrical circuit is combined with a nonlinear mechanical indicator to produce an accurate indication of pitch attitude over an expand... | 02/06/1979 |
| 4134106 | Absolute resolver angle to digital converter circuit An absolute resolver digitizer for a numerical control system generating a digital number indicative of the absolute angular position of a resolver's rotor within a given revolution is disclosed herein. The resolver digitizer comprises a reference generat... | 01/09/1979 |
| 4097922 | Automatic real time navigation communicator An automatic real time navigation communicator that communicates between vehicle mounted speed and heading sensors and the vehicle mounted satellite navigator. The communicator automatically and at predetermined intervals updates the satellite navigator... | 06/27/1978 |
| 4062005 | Synchro-to-digital converter employing common processing apparatus Circuitry monitors a plurality of rotating shafts, and provides a corresponding plurality of binary output words each characterizing the angular position of an associated shaft. Synchro and Scott "T" per-shaft monitoring elements are sampled by common mul... | 12/06/1977 |
| 4060799 | Two-speed resolver employing differential reduction techniques A two-speed resolver system wherein the rotor of a fine brushless resolver which is directly connected to the shaft to be instrumented is connected to the rotor of a coarse resolver so that the rotor ofthe coarse brushless resolver rotates at a proportion... | 11/29/1977 |
