Class 336/75 - Movable with respect to another coil

Subclass of Class 336 - Inductor devices
Definition: Subject matter wherein the coil and the conductive member
No. of patents: 33
Last issue date: 09/19/2006

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Number	Title	Issue Date
7110718	Phase distortion using MOS nonlinear capacitance RF phase distortion circuits and methods for controllably phase distorting an RF signal based on amplitude of the RF signal. An MOS device is provided having a body of a first conductivity type and at least one region of a second conductivity type in the body, with ...	09/19/2006
7058540	Method and system for accelerating power complementary cumulative distribution function measurements Data values representing the (I2+Q2) values are converted to floating-point representations and a histogram of the floating-point numbers is generated. The count for each histogram bin in the histogram is stored in a memory. Each floating-point...	06/06/2006
6974220	Bright pointer for instrument cluster An instrument display for a vehicle dash includes a unique light source and light guide assembly. The light source is incorporated directly into the light guide. A non-contact magnetic coupling transfers power from a circuit board to the light source. A textured sur...	12/13/2005
6859126	Noncontact transformer A non-contact transformer includes a transformer component provided on the floor of a housing, a printed circuit board on the transformer component, and an empty core space is formed within the transformer component wherein deformation of the housing is prevented th...	02/22/2005
6642711	Digital inductive position sensor A differential pulse transformer having a drive coil (10a) and differential sense coils (10b) are disposed on a planar surface with a target (10e, 10f) movable over the sense coils to cause an imbalance in magnetic field when a large di/dt pulse is genera...	11/04/2003
6049204	Electronic linear scale using a reduced offset high accuracy induced current position transducer An electronic linear scale having a reduced offset position transducer that 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 ge...	04/11/2000
5936399	Inductive position transducer having a multi-tap receiver winding An induced current position transducer has a multi-tap winding. The multi-tap winding allows for digital interpolation of position to a small fraction of a wavelength, thereby reducing the amount of analog interpolation performed by the transducer electro...	08/10/1999
5804892	Transmission device A device for contact-free transmission of electrical energy from at least one power supply to at least one consumer has a first transformer having connected thereto a first current converting device and a second transformer having connected thereto a seco...	09/08/1998
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
5291152	Proximity switch having oscillator inductively coupled through pulsed Faraday shield to resonant target An inductive type proximity switch (S) includes an open-ended loop (L3) adjacent to the inductor (L1, L2) of the parallel resonant circuit of its main (LC) oscillator. A high speed bistate switch (S1) is connected between the ends of the loop (L3). A puls...	03/01/1994
4986124	Screened inductance sensors, especially sensors for level measurement In a screened inductance sensor having a drive winding, a sense winding, and a conductive screen for varying the induced voltage in the sense winding by reason of the eddy currents generated in the conductive screen in the presence of the drive field, a p...	01/22/1991
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
4853604	Position and speed sensors In a sensor having a drive winding for establishing a forward field, an electrically conductive screen is displaceable relative to a sense winding. In the presence of the drive field, eddy currents are generated in the screen to establish a counter-field ...	08/01/1989
4845986	Liquid level indication device A liquid level indicator for detecting a liquid level by utilizing the variation inductance of a coil having a core made of an electrical insulating magnetic material and provided inside a winding of the coil. The core may be made by piling a plurality of...	07/11/1989
4833919	Device for measuring displacement Herein disclosed is a device for measuring a displacement of a movable member relative to a fixed member by putting the electromagnetic induction into practical use. The device comprises a first coil having first and second coil sections which are coaxial...	05/30/1989
4810990	Transducer with apertures in tubular conductor A variable inductance transducer includes a winding which is wound about a cylindrical former and a tubular member formed from electrically conductive material which is located about the winding and is movable axially relative thereto. The tubular member ...	03/07/1989
4806834	Electrical circuit for inductance conductors, transformers and motors An electrical circuit for inductance conductors, transformers and motors is provided wherein two coils of electrically conductive wire are coiled about a bar of magnetizable material such that they are disposed in mirror image symmetrical relation with ea...	02/21/1989
4737698	Position and speed sensors In a sensor having a drive winding for establishing a forward field, an electrically conductive screen is displaceable relative to a sense winding. In the presence of the drive field, eddy currents are generated in the screen to establish a counter-field ...	04/12/1988
4460896	Antenna with tunable helical resonator An antenna suitable for use in the high frequency (HF) ranges includes a resonator tunable over a predetermined frequency band. The resonator consists of an insulated wire wound over a dielectric rod. Tuning is effected by sliding a metallic sleeve dispos...	07/17/1984
4425511	Planar coil apparatus employing a stationary and a movable board A planar coil apparatus is disclosed for providing an output signal indicative of a movement between at least a first and a second position. A first stationary planar member has disposed on a surface, a first flat coil configuration which is emplaced ther...	01/10/1984
4358762	Inductive transducer responsive to displacement along a path The variable inductor and the comparison inductor of a semi-differential variable inductance both have a pair of coils magnetically coupled together. The output current of an amplitude-controlled oscillator flows through the series combination of one coil...	11/09/1982
4353050	Displacement measuring transducer A displacement-measuring transducer has a laminar member displaceable, for example under control of a vacuum actuator, within a housing containing respective pairs of coils spaced part in the displacement direction of the laminar member, which is provided...	10/05/1982
4283714	Magnetic keyboard system A contactless travel keyboard has first and second coils with elongated loop portions arranged at each key station so that, when an electrically conductive key element at the station is in a key-up position spaced from the coils, electrical input to the f...	08/11/1981
4188603	Inductor with conducting core of sintered powdered metal A sintered powdered aluminum core for an inductor used in the tuning stages of high frequency equipment is disclosed. Such cores have threads ground on them having sharp thread profiles, as opposed to the flat thread profiles produced by screw machines, a...	02/12/1980
4132980	High-sensitivity inductive transducer for rectilinear or rotational displacement A core with at least three elongated legs, at least one leg being centrally located among all the elongated legs, is joined at at least one end by a yoke portion connecting all the legs. The central leg or legs is wound with a magnet winding close to the ...	01/02/1979
4125021	Apparatus for detecting conductive liquid level An apparatus for detection of the level of a liquid metal is disclosed. The apparatus has a liquid level detecting probe provided with an exciting coil wound in a closed bottom non-magnetic sheath over the approximately whole length thereof, a level detec...	11/14/1978
4123735	Induction-type meter for measuring mechanical quantities An induction-type meter for measuring mechanical quantities, comprising a first converter to convert the controlled parameter into a displacement and having elements adapted to be moved relative to each other, and a second converter to convert the displac...	10/31/1978
4117438	Contactless keyswitch for keyboards Inductive sensing keyswitch includes a printed circuit transformer and sheet of material having hinged metal flaps formed therein and each flap is resiliently biased against both printed circuit coils of the transformer for eddy-current shorting of both c...	09/26/1978
4080592	Transducer for vehicular service compensated for accelerator movements of the vehicle An inductive transducer is provided with a core with legs extending in opposite directions from a yoke on which a coil is wound. On the leg portions extending on one side of the coil a short-circuiting ring displaceable in accordance with the displacement...	03/21/1978
4075551	Inductive displacement sensor A variable inductor having a U-shaped magnetic core with a short-circuiting plate providing a short-circuiting ring for both legs of the core movable along the core legs in response to a displacement to be measured is connected in an electronic circuit to...	02/21/1978
4034325	Coarse and fine adjustment warp coil An inductor coil consisting of two cores enclosed by a single layer of wire is disclosed. The cores may be of the same or different permeability. The coils arranged in this configuration behave like two coils in series in which the relative values of indu...	07/05/1977
4017704	Induction heating apparatus and method for using the same An elongate copper coil with an open center area has a bow-tie shaped non-magnetic metal core disposed adjacent the center of the coil and insulated from the coil. The coil is adapted to be connected to a high frequency alternating current generator for p...	04/12/1977
4013986	Inductive transducer for rectilinear or rotational displacement The inductance of a coil wound on one end of an elongated rectangular core with an elongated central window is caused to vary by the displacement of a conducting plate or ring arrangement lengthwise of the core. The other end of the core may also be wound...	03/22/1977

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Class 336/75 - Movable with respect to another coil