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| Number | Title | Issue Date |
| 7142086 | Ultra broadband inductor assembly Systems and apparatuses for providing a broadband inductor assembly. One broadband inductor assembly includes a conical coil inductor having a broad end with radius r1 and a narrow end with radius r2, the conical coil inductor also having a bro... | 11/28/2006 |
| 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 |
| 6720760 | Induced current position transducers having improved scale loop structures A scale loop formed by a loop trace of electrically conductive material is usable in an induced current position transducer. The scale loop is continuous and has a particular shape depending on the configuration of the induced current position transducer. The scale ... | 04/13/2004 |
| 6628115 | Scale loops for electromagnetic induction-type absolute position transducer A electromagnetic induction-type absolute position transducer according to the present invention has a plurality of scale loops functioning as coils. The scale loop has first and second loop portions and a connecting pattern portion which connects the cor... | 09/30/2003 |
| 6489899 | 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... | 12/03/2002 |
| 6329813 | Reduced offset high accuracy induced current absolute position transducer An inductive absolute position sensor has at least one magnetic field generator that generates a first changing magnetic flux in a first flux region. A plurality of coupling loops have a first plurality of coupling loop portions spaced at an interval rela... | 12/11/2001 |
| 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 |
| 6005387 | Reduced offset high accuracy induced current position transducer A reduced offset position transducer uses at least one coupling loop on a scale to inductively couple a transmitter winding on a read head to one or more receiver windings on the read head. The transmitter winding generates at least one primary magnetic f... | 12/21/1999 |
| 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 |
| 5808537 | Inductor core for transferring electric power to a conveyor carriage A pickup device has a core to which a coil is wound about. The core has a body formed by laminating a plurality of plates having a predetermined shape. Eddy currents produced by leakage flux is suppressed at the ends of the core. This is achieved by lamin... | 09/15/1998 |
| 5705972 | Substrate for an induction sensor In an electromagnetic induction type displacement sensor, two coil patterns are formed on a substrate included in a scale. The coil patterns alternate with each other in the sensing direction of the sensor and are deviated in spatial phase from each other... | 01/06/1998 |
| 5537088 | Structure of an induction sensor In an induction sensor, a plurality of positioning holes are formed through each of a scaler and a slider. The positioning holes of the scaler and slider are spaced the same distance from respective coils and are of the same size and arranged at the same ... | 07/16/1996 |
| 5467718 | Magnetic levitation transport system with non-contact inductive power supply and battery charging A magnetic levitation transport system includes magnetic levitation vehicles each driven by a linear motor to run along a track. Induction lines extend through predetermined blocks of the running track to transmit a high frequency sine-wave current. Each ... | 11/21/1995 |
| 5381091 | Sensor having mutually perpendicular sections using zigzag coils for detecting displacement A sensor having a wide sensing range is capable of being controll by a small scale processor. The sensor comprises: a plurality of planar zigzag coils being provided on substrates, the planar zigzag coils having the same coil pitch and being formed into z... | 01/10/1995 |
| 4901069 | Apparatus for electromagnetically coupling power and data signals between a first unit and a second unit and in particular between well bore apparatus and the surface In the representative embodiment of the new and improved apparatus disclosed herein, the apparatus, including a core of a specific material, couples a first unit to a second unit. The first unit may, for example, be a downhole tool, the second unit being ... | 02/13/1990 |
| 4893078 | Absolute position sensing using sets of windings of different pitches providing respective indications of phase proportional to displacement For enabling a resolver to have absolute position sensing over a wide displacement range while still obtaining the resolution, accuracy and precision obtainable by operation in an incremental mode, the resolver is provided with a number of terminals for p... | 01/09/1990 |
| 4782342 | Proximity identification system with lateral flux paths An electrical proximity identification system which has lateral flux. The system has a reader section with a reader antenna which is comprised of a pair of coils. The coils are located in the same plane and are oriented such that when they are energized b... | 11/01/1988 |
| 4634126 | Device for converting the amount of a mechanical displacement into electrical signal A transducer converts the amount of mechanical displacement of a member into an electrical signal by magnetic induction. Two fixed coils different in winding direction from each other are spaced apart from each other by a suitable distance and connected i... | 01/06/1987 |
| 4493214 | Transducers for providing an electrical signal representative of physical movement A transducer, especially suitable for monitoring welds (22), in a sodium-cooled nuclear reactor, has two plates (11, 12) in sliding face contact with parallel slots (13, 14) holding inductively coupled conductors (15, 17). One plate (12) is connected dire... | 01/15/1985 |
| 4273448 | Measuring method and apparatus This invention relates to method and apparatus for improving the accuracy of optical or electrical position measuring apparatus wherein movement of one object relative to another is measured. One known system employs primary and secondary windings each co... | 06/16/1981 |
| 4255728 | Parallel resonant electric circuit A parallel resonant electric circuit comprising a first and second concentric electrical coil wound in the same directions with the convolutions of the one coil between the convolutions of the other coil and with one end of one coil connected to the oppos... | 03/10/1981 |
| 4236127 | Electrical frequency responsive structure An electrical frequency responsive circuit comprising a first coil constructed of wire having an insulating coating thereon wound in a single layer about an axis of generation, and a second coil, also constructed of wire having an insulating coating there... | 11/25/1980 |
| 4227165 | Correction of linear errors in position measuring transducers A member of a linear position measuring transducer is provided with a hole running parallel to its windings. In one embodiment, elements are inserted into the hole to expand or shorten the length of the transducer. In another embodiment, cutout slots are ... | 10/07/1980 |
| 4167808 | Harness for electromagnetic transducer A harness for an electromagnetic transducer such as an INDUCTOSYN-type slider includes four separate series of thin flat U-shaped connectors stacked on top of each other for connecting the ends of the U-shaped conductors on the slider to each other in the... | 09/18/1979 |
| 4150352 | Precision transducer for position measurements A precision transducer for position measurements comprises a pair of supports, one of which is movable with respect to the other. Each support is provided with an electric winding constituted by equidistant serially connected printed circuit conductors ex... | 04/17/1979 |
| 4128818 | Electrical frequency responsive structure An electrical frequency responsive circuit comprising a first relatively larger diameter coil constructed of wire having an insulating coating thereon wound in a single layer about an axis of generation, and a second relatively smaller diameter coil havin... | 12/05/1978 |
| 4117439 | Transducer for measuring linear positions A transducer for measuring linear positions comprises a scale formed of a tensioned flexible band and a slide movable with respect to the scale. A rigid guide plate fast with the slide extends over the whole area of the slide winding and cooperates with a... | 09/26/1978 |
| 4096463 | Inductive transducer An inductive transducer includes first and second relatively movable members, the first relatively movable member having a plurality of windings and the second relatively movable member having a winding. The windings of the first relatively movable member... | 06/20/1978 |
| 4014015 | Absolute digital position measurement system A linear position measurement system including a linear member and a relatively movable member. The linear member includes a plurality of serpentine electrical conductors, each representing one bit of a multiple bit Gray code. At any longitudinal position... | 03/22/1977 |
| 4005396 | Digital displacement sensor with zigzag coils A digital displacement sensor includes a plurality of zigzag coils provided with projecting or convex portions having different pitches and arranged on the surface of a flat plate. A magnetic head consisting of a magnetic body and a coil is wound around p... | 01/25/1977 |
| 3962663 | Inductive position determining device Inductive position determining device which comprises a signal winding having meander curves which extend at right angles to the direction in which displacement is determined and two pick-up windings which have corresponding meander curves. The meander cu... | 06/08/1976 |
| 3953816 | Position detecting system A position detecting system includes a sending unit in the form of a continuous conductor describing a Greek key pattern surrounded by a return-path conductor arrangement. The return-path conductor is so arranged as to provide additional legs of the patte... | 04/27/1976 |
| 3939391 | Apparatus for charging a hermetically sealed electrical energy source An apparatus for charging an electrical energy source secured within a water-tight or hermetically sealed housing. The apparatus includes a transformer having a primary and secondary coil. The secondary coil is secured within the housing, whereby the hous... | 02/17/1976 |
