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| Number | Title | Issue Date |
| 7368908 | Magnetic element A magnetic element in a flat-plate shape includes a linearly-extending first flat plate being made of one of a magnetic material and a conductive material and a helical second flat plate being made of the other of the magnetic material and the conductive material, a... | 05/06/2008 |
| 7356938 | Bore gauge apparatus for use in reconditioning articulated connector An apparatus for measuring a reconditioned portion of an articulated connector engaged in a reconditioning fixture while it is still mounted to the end structure of a rail car is disclosed. The gauge is a generally cylindrical arc with an inner side and outer side. ... | 04/15/2008 |
| 7281432 | Displacement sensor with an excitation coil and a detection coil To be able to detect a displacement amount of a moving object by a resolution of from micrometer to nanometer by a simple structure. An excitation coil 23 and a detection coil 25 are arranged to align and a magnetic body probe 27 in a con... | 10/16/2007 |
| 7246537 | Wire-wound leadscrew assembly with a preloaded leadscrew wire nut, and its fabrication A leadscrew assembly includes a leadscrew having a leadscrew thread wire helically wound about a leadscrew axis in a plurality of cylindrical leadscrew-thread turns and having a leadscrew-thread pitch. A leadscrew wire nut assembly includes a nut-assembly wire helic... | 07/24/2007 |
| 7229063 | Pressure control valve The invention concerns a pressure control valve for the control of the value of pressure in a hydraulic circuit, especially in a hydraulic circuit of a vehicle transmission, with a valve housing, with a solenoid coil, with an armature component group comprising an a... | 06/12/2007 |
| 7229908 | System and method for manufacturing an out of plane integrated circuit inductor A system and method is described for manufacturing an out of plane integrated circuit inductor. A plurality of parallel metal bars are formed on a substrate and covered with a first passivation layer. A ferromagnetic core is then deposited over the first passivation... | 06/12/2007 |
| 7167073 | Semiconductor device A semiconductor device increases the efficiency of the inductor having a three-dimensional spiral coil and increases the inductance value without requiring any special steps. The semiconductor device includes semiconductor elements and first, second and third metal ... | 01/23/2007 |
| 7053603 | Circuit arrangement with a linear variable differential transformer (LVDT) as a displacement sensor or force sensor In a circuit arrangement having a linear variable differential transformer as a displacement sensor or force sensor, having a selection circuit which is connected to the primary coil of the transformer and which provides an output current for triggering the primary ... | 05/30/2006 |
| 7024786 | Multi-coordinate sensing measuring device A multicoordinate sensing measuring device is proposed in which a sensing lever (5) that is resiliently spring-pretensioned in a resting position in a housing (3) can be displaced along a measuring axis (7) and can be pivoted transversely to the... | 04/11/2006 |
| 6605940 | Linear variable differential transformer assembly with nulling adjustment and process for nulling adjustment A linear variable differential transformer (LVDT) assembly comprises a housing. A tube extends into the housing. An armature mounts inside of the tube and can move longitudinally within the tube. A coil assembly, which includes a primary coil and two seco... | 08/12/2003 |
| 6597269 | Convergence coil structure for a deflection yoke and method of producing deflection yokes A deflection yoke includes a bobbin having a cavity formed in the longitudinal direction of the bobbin, and an adjusting coil having a magnetic core on which a thread is cut. The core inserted into the cavity is slidable in the longitudinal direction of t... | 07/22/2003 |
| 6580264 | Position detector with magnetic core and detection and auxiliary coils In a position transducer having detection coils 11 and 21, auxiliary coils 12 and 22 are driven in phase with the detection coils 11 and 21 and are lap-wound on the ends of the detection coils to substantially increase the winding density at the ends of t... | 06/17/2003 |
| 6561022 | Position encoder A linear position sensor is provided which employs phase quadrature sensor windings, an excitation winding and a resonator. When an excitation current is applied to the excitation winding, it causes the resonator to resonate which in turn induces signals ... | 05/13/2003 |
| 6359539 | Magnetic core and deflection yoke having the same A deflection yoke includes a bobbin having a cavity formed in the longitudinal direction of the bobbin, and an adjusting coil having a magnetic core on which a thread is cut. The core inserted into the cavity is slidable in the longitudinal direction of t... | 03/19/2002 |
| 6222436 | Axial movement linear gauging head A linear gauging head, or cartridge head, comprises a casing, a spindle movable with respect to the casing along a longitudinal axis, a feeler coupled to a first end of the spindle and a differential position transducer with windings, fixed with respect t... | 04/24/2001 |
| 6087919 | Axial movement linear gauging head A linear gauging head, or cartridge head, comprises a casing (1), a spindle (10) movable with respect to the casing along a longitudinal axis, a feeler (12) coupled to a first end of the spindle and a differential position transducer with windings (13, 14... | 07/11/2000 |
| 5789918 | Temperature compensated differential transformer and a measuring device using the same A differential transformer includes a primary coil for excitation and first and second secondary coils for detection which can be wound up on an outer surface of a bobbin made of a non-magnetic substance. In the bobbin, i.e., in a differential coil compos... | 08/04/1998 |
| 5453685 | Inductive position sensing device and apparatus with selectable winding configuration A variable inductance device for indicating the position of one body relative to another includes primary and secondary windings which are mounted such that one is slidable over the other. The primary winding is wound on a body including annular channels ... | 09/26/1995 |
| 5432493 | Two linear differential transformers with armature A transformer arrangement is provided which has a primary and at least one secondary winding coupled via a movable armature which is outside of the windings. A second transformer can be provided which has primary and secondary windings coaxial with and su... | 07/11/1995 |
| 5347255 | Variable inductance coil device The variable inductance coil device having an outer magnetic member, a bobbin member, a coil member and an inner magnetic member. A female thread (thread portion) is provided in the inner periphery of the tube of the bobbin member, and a male thread (thre... | 09/13/1994 |
| 5256999 | Thread type magnetic core structure A thread type magnetic core structure, including: a magnetic core having a thread formed on the outer surface of the core; and a resin structure of a rod type fixedly mounted on one end surface of the magnetic core in the longitudinal direction of the cor... | 10/26/1993 |
| 5153547 | High frequency coil A bobbin provides a coil wound on the outer peripheral surface and allows a threaded core to be screwed on the inner peripheral surface. This bobbin is covered with a jar-like core and a metal case. The jar-like core and the metal case provide through hol... | 10/06/1992 |
| 5146784 | Sensor for measuring liquid-level changes in storage tanks The improved device for measuring liquid-level changes in storage tanks uses a float to track vertical displacement of the surface of a liquid and a linear variable differential transducer (LVDT) sensor positioned below the surface of the liquid to measur... | 09/15/1992 |
| 5089930 | Temperature compensated linear variable transformer A differential transformer is provided comprising an elongated bobbin having primary and secondary coils wound about separated sections. A ferromagnetic armature is movably disposed within a core of the bobbin for movement between the separated sections. ... | 02/18/1992 |
| 5061896 | Variable transformer to detect linear displacement with constant output amplitude A variable transformer is disclosed. The transducer includes a uniform pitch winding wound on a hollow bobbin with several continuously variable concentric coils wound over it with layers of insulation in between. The variable coils are wound in accordanc... | 10/29/1991 |
| 5004391 | Portable dextrous force feedback master for robot telemanipulation An electronic position sensor and a pneumatic microactuator form a portable robot master that may be operated by the fingers of a user's hand in the same, natural manner that the user would normally grasp an object to be finger manipulated. The master req... | 04/02/1991 |
| 5003258 | Position transducer with temperature dependency compensation having a coil and displaceable core made of conductive and ferromagnetic materials The transducer comprises only a simple coil in which a core normally connected to a device the position of which is to be measured is displaced axially. The core comprises a rod of ferromagnetic material surrounded by a tube of good electrical conductivit... | 03/26/1991 |
| 4987783 | Sensor and transducer apparatus A sensing system including a sensing device with cooperating electrical components which move relative to each other in response to a sensed environmental parameter to yield a reactance signal, which is transmitted to a remotely located processor having a... | 01/29/1991 |
| 4943794 | Molded coil and manufacturing method thereof A molded coil directly connected face to face to a conductor pattern of a circuit board, for eliminating unnecessary dimensions for pulling out end parts of the coil as face-to-face connection terminals, comprises at least one coil arranged along a vertic... | 07/24/1990 |
| 4926123 | Precision variable pitch compensation winding for displacement transducer A compensation winding for improving the linearity of a displacement transducer. The displacement transducer is the type having an electrically conducting non-ferromagnetic wall which moves in telescoping relation with the coil and is excited by a signal ... | 05/15/1990 |
| 4923307 | Dilatometer An improved dilatometer suitable for testing the coefficient of thermal expansion (CTE) of a workpiece. The workpiece having a CTE in the range of -0.2×10-6 inch/inch °F. to 0.2×10-6 inch/inch/°F. The improvement includes a refer... | 05/08/1990 |
| 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 |
| 4890084 | Inductance strain gauge Side-by-side inductor coils are wound in a single layer around a thin flat tubular frame. The frame has a closed end portion and is mounted on an insulative base sheet. An elongated thin magnetic core is cantilevered from a insulative connecting rod and n... | 12/26/1989 |
| 4887465 | Transducers for hostile environments A screened inductance level transducer has a drive winding for setting up a drive field, and a sense winding in which voltage is induced in the presence of the drive field. A conductive screen, which may be of stainless steel, is mounted on a float for mo... | 12/19/1989 |
| 4857824 | Movable core position transducer A two-wire linear transducer comprised of a high permeability finite length core that is positioned with respect to a continuously wound variable pitch coil. The cores is displaced from the initial stroke position at one end of the coil to the opposite en... | 08/15/1989 |
| 4853666 | Push button for an inductive value input keyboard A push button for an inductive value input keyboard having a push-button socket, a push-button head guided in the push-button socket, a compression spring which acts between the push-button socket and the push-button head, a stop which limits the stroke o... | 08/01/1989 |
| 4841209 | Actuator control system with displacement sensor fault detection A novel actuator control system is characterized by displacement sensor fault detection. The system includes linear variable phase transducer (LVPT) displacement sensors. A pair of engine electronic controls (EEC) each determines the actuator position by ... | 06/20/1989 |
| 4808958 | Linear variable differential transformer with improved secondary windings A linear variable differential transformer (LVDT), includes a hollow bobbin with first and second ends, a ferromagnetic core adapted for linear movement within the bobbin, a primary coil wound around the exterior of the bobbin, and first and second second... | 02/28/1989 |
| 4736513 | Miniature inductor and method of manufacturing same A miniature variable inductor comprises a coil soldered to a pair of connecting skids. These skids are clipped to two oppositely disposed lateral walls of an injection-molded plastics cover in the shape of a hollow die. A solid part of the cover and a hol... | 04/12/1988 |
| 4725805 | Electric current control type variable inductor The construction of cores in an electric-current-controlled type variable inductor used in radio receivers is disclosed. The inductors have three or four cores. In the case of the variable inductors of the type having three cores, the winding portion of a... | 02/16/1988 |
