43 results about "Concentric electrode" patented technology

A system for stimulating a nerve or nerves in a patient includes an electrode patch having an array of equally spaced concentric electrodes each having a central cathode and a concentrically surrounding anode. The electrode array patch is used to determine the location of the nerve or nerves to be stimulated by electrical pulses. Once the location of the nerve is determined, a concentric electrode patch having a central cathode and a concentrically surrounding anode is positioned at the optimal location on the patient's skin to effect neurostimulation. The concentric electrode patch may be removably affixed to the patient's skin by adhesive or magnets.

Methods and apparatus for selectively heating a target tissue via radiofrequency (RF) electrical energy. Apparatus of the invention includes an electrode unit having a plurality of concentric electrodes, wherein supply of electrical energy to each electrode may be independently controlled such that each of the plurality of electrodes has a different value of an electrical parameter for tissue treatment. Methods for selectively heating and treating tissue, for detecting thickness of tissue, and for determining a treatment value of an electrical parameter for each of a plurality of electrodes of an electrode unit are also disclosed.

A multi-mode resistivity tool measures at multiple depths into the near-borehole formation. By use of a four mode tool, measuring to four depths at the formation, a more accurate invasion zone resistivity measurement may be made than previously known. The tool itself is shown as including six concentric electrodes, although not every electrode is necessary for every mode.

Uniform spatial distribution of plasma over the face of a semiconductor wafer is achieved using a multi-zone electrode forming part of an electrostatic chuck used to hold the wafer in a processing chamber. The electrode includes a plurality of concentric electrode portions to which differing RF bias voltages may be applied to produce an electric field having a desired spatial distribution. Sensors are used to monitor either the spatial distribution of the plasma or the process effects of the plasma, and the sensed information is fed back to a controller that adjusts the bias voltage on the electrode portions in a manner to maintain the spatial uniformity of the plasma.

A system for coupling teraherz (THz) radiation to a coaxial waveguide comprises an antenna that generates THz radiation having a mode that matches the mode of the waveguide. The antenna may comprise a pair of concentric electrodes, at least one of which may be affixed to or formed by one end of the waveguide. The radiation may have wavelengths between approximately 30 μm and 3 mm. The waveguide may comprise an inner core and an outer wall defining an annular region. A terahertz sensor system may comprise a terahertz antenna comprising first and second concentric electrodes, means for generating a field across the trodes and means for triggering the emission of terahertz radiation, a first waveguide having first and second ends, said first end being coupled to said antenna so as to receive at least a portion of said terahertz radiation, and a sensor for detecting said terahertz radiation.

A multi-mode resistivity tool measures at multiple depths into the near-borehole formation. By use of a four mode tool, measuring to four depths at the formation, a more accurate invasion zone resistivity measurement may be made than previously known. The tool itself is shown as including six concentric electrodes, although not every electrode is necessary for every mode.

A charging apparatus for a mobile device is provided. The apparatus includes a terminal casing and a charging mount. A pattern electrode part has concentric electrode patterns. A first magnet is provided underneath the pattern electrode part, and a second magnet having multiple magnet elements is disposed around the pattern electrode part. The charging mount has a pin terminal part which comes into contact with the pattern electrode part. A third magnet being magnetically coupled with the first magnet is provided underneath the pin terminal part. A fourth magnet being magnetically coupled with the second magnet is provided around the pin terminal part.

A surgical lead for neurostimulation includes a central cathode circumscribed by an outer anode to define an annular space within which an electromagnetic field is generated between the two electrodes, and associated methods.

A charging apparatus for a mobile device is provided. The apparatus includes a terminal casing and a charging mount. A pattern electrode part has concentric electrode patterns. A first magnet is provided underneath the pattern electrode part, and a second magnet having multiple magnet elements is disposed around the pattern electrode part. The charging mount has a pin terminal part which comes into contact with the pattern electrode part. A third magnet being magnetically coupled with the first magnet is provided underneath the pin terminal part. A fourth magnet being magnetically coupled with the second magnet is provided around the pin terminal part.

A first electrode of a liquid crystal cell (21) is composed of a plurality of concentric electrodes (31 to 34) of a concentrically circular shape, the plurality of concentric electrodes are divided into a first group of concentric electrodes (44) near the center and a second group of concentric electrodes (45) near the periphery, and a concentric electrode between the two groups is an independent single electrode (36). A first correction unit that corrects spherical aberration of a high density DVD is composed of the two groups and a second correction unit that corrects aberration of a conventional DVD is composed of the first group of concentric electrodes (44). In the case of correcting the aberration of the conventional DVD, the independent concentric electrode (36) is supplied with a voltage between the voltages respectively supplied to adjacent concentric electrodes (35), (37). In the case of correcting the aberration of the high density DVD, the independent concentric electrode (36) is supplied with a voltage equal to the voltage supplied to the concentric electrode immediately lateral thereto (37).

An ion cyclotron resonance cell having a large ion trapping volume is described. The cell includes elongated spaced concentric electrodes having a common axis in which the trapping volume is the space between the electrodes. The cell may also include trapping electrodes disposed at the ends of the elongated concentric electrodes.

First electrode (21) of a liquid crystal cell consists of a plurality of circular concentric electrodes (31-43), and the electrodes are divided into a first concentric electrode group (44) close to the center and a second concentric electrode group (45) close to the outer circumference, and the concentric electrode (36) between the both groups is permitted to be an independent electrode. A first correction means for correcting a spherical aberration of a high density DVD is constituted of the both groups, and a first correction means for correcting an aberration of a conventional DVD is constituted of the first concentric electrode group (44). At the time of correcting an aberration of a conventional DVD, the independent concentric electrode (36) is supplied with a voltage between the voltages being supplied to adjacent concentric electrodes (35, 37). At the time of correcting an aberration of a high density DVD, the independent concentric electrode (36) is supplied with a voltage identical to the voltage being supplied to the concentric electrode (37) just on the outside thereof.

A liquid crystal lens includes a first light-pervious plate, a second light-pervious plate, a first electrode layer arranged on the first light-pervious plate, a second electrode layer arranged on the second light-pervious plate, and a liquid crystal layer sandwiched between the first light-pervious plate and the second light-pervious plate, where the first electrode layer comprises a plurality of concentric electrodes, and a gap between two adjacent outer concentric electrodes is different from a gap between two adjacent inner concentric electrodes.

An electro-catalytic membrane system for preparing fuel gas from water operates at normal levels of pressure and temperature. The system includes a high frequency power source, a power supply system, a programmable control unit, an electro-catalytic membrane module, and a module for processing the fuel gas. The electro-catalytic membrane module includes metallic electrodes in a concentric arrangement. The space between the concentric electrodes includes granular carbon and metallic particles. A fixed membrane is arranged at a lower end of the space while a mobile membrane is arranged at an upper end of the space. The electro-catalytic membrane module is further provided with sensors for measuring process parameters, conduits, and valves for supplying and removing liquids. A system for cooling the metallic electrodes is also provided.

A multilayer chip capacitor includes electrodes comprised of numerous, closely spaced conductive layers interposed within a dielectric laminate. Adjacent conductive layers are essentially non-overlapping, so that fringe capacitance between opposing electrodes provides substantially all of the capacitance. The conductive layers may be shaped to form a non-planer boundary between electrodes. An additional high frequency integrated capacitor is formed from external electrode plates. The non-planar electrode boundary principle is also applied to discoidal capacitors in the form of a non-concentric electrode boundary.

The invention discloses a fabric surface specific resistance and volume specific resistance testing device which is characterized in that a fabric clamping device uses a three-electrode system to serve as the testing electrode of fabric surface specific resistance and volume specific resistance, and the three electrodes include two concentric electrodes contacting with the upper surface of fabric and an electrode contacting with the lower surface of the fabric; during volume specific resistance and surface specific resistance testing, the three electrodes are respectively connected with the anodes and the cathodes of a ground resistance meter and a high resistance meter to perform measuring; a resistance testing part comprises the high resistance meter which is used for being connected with the electrodes to perform measuring, and a volume specific resistance / surface specific resistance switching switch is used for selecting whether the two electrodes for testing the volume specific resistance are connected to the high resistance meter or the two electrodes for testing the surface specific resistance are connected to the high resistance meter. The fabric surface specific resistance and volume specific resistance testing device has the advantages that the device is suitable for testing the volume specific resistance and surface specific resistance of fabric of various specifications, fabric thickness can be tested at the same time, and testing results are accurate.

A working fluid filtration and separation system that removes contaminants from a working fluid of a working machine. The system includes a vessel and an electrostatic collector mounted within the vessel which electrostatically removes contaminants from contaminated working fluid as it passes through the electrostatic collector element. The electrostatic collector element includes a plurality of concentric electrodes of different radii, a plurality of corrugated walls residing in spaces located between adjacent electrodes. An elongated center post electrode is provided that induces a voltage in at least one of the plurality of concentric electrodes. The system is configured to generate a voltage difference between each pair of adjacent concentric electrodes to electrostatically remove contaminants from the working fluid as it flows through the filtration and separation system. The system further includes a center post isolator that is configured to mount the center post isolator within the vessel and electrically insulate the center post electrode from the vessel.

The invention discloses a concentric electrode static electric field simulation device and a usage method thereof. The device comprises a base, a longitudinal movement mechanism, a lateral movement mechanism, a probe mechanism and a concentric electrode plate. The longitudinal movement mechanism comprises two longitudinal guide rails which are fixed on both sides of the base in parallel, a longitudinal slide block is slidably mounted on each longitudinal guide rail, and a longitudinal scale is fixed on each longitudinal guide rail. The lateral movement mechanism comprises a transverse guide rail, the both ends of the transverse guide rail are respectively fixed on one longitudinal slide block respectively, the lateral guide rail is slidably provided with a lateral slide block, and a lateral scale is fixed on the lateral guide rail. The probe mechanism is fixed on the lateral slide block; the concentric electrode plate is fixed at the center position of the base; and the probe mechanism can realize the free movement in the longitudinal direction and the lateral direction and the data measurement. The usage stability and reliability of the instrument is improved.

An electrophysiology catheter with a distal electrode assembly having covered spine carrying a plurality of microelectrodes. The position of the microelectrodes on each spine is staggered relative to microelectrodes on adjacent spines so as to minimize the risk of electrodes on adjacent spines touching each other during use of the catheter. The staggered electrode configuration provides the distal electrode assembly with a greater effective contact surface because the effective concentric electrode arrays is increased or at least doubled.

The system presented is an electrolytic cell and system for electrolysizing and / or heating a fluid electrolyte containing hydrogen in one of its several isotopic and compound forms having a conductive solution electrolyte. The electrolytic cell includes an electrically conductive electrode prepared of selected metals and / or their alloys. The cell is designed to release heat and / or reaction products during or after operation. The several electrodes are placed in electrical contact with the fluid electrolyte so that current passes between the several electrodes and made to flow through the electrolyte. The currents and voltages used between the various electrodes are chosen to be high enough to form ionization of some selected parts of the fluid electrolyte and move hydrogen in one of its various forms to the surface of one or more electrodes. Several geometric configurations such as microspheres, multicells, concentric electrodes and other forms can be used. An electric power source in the system is connected across the electrodes whereby electrical current flows between the electrodes within the fluid electrolyte and supplying a large current density at one or more electrodes.

Biocolloids, e.g. Cryptosporidium parvum oocysts, are removed from water by filtration using a packed bed of a granular filter medium, preferably MgO, establishing an electric field across the packed bed, perpendicular to the flow of the water through the packed bed. The packed bed is provided in an annular space between two concentric electrodes.

The present disclosure illustrates a silicone concentric electrode and applies to electrical stimulation. The electrode includes at least a silicone electrode sheet and two wires. The silicone electrode sheet has a non-conductive rubber that separates the positive electrode and the negative electrode, and the negative electrode and the positive electrode will be connected to each wire respectively.

This dielectrophoretic micro cell chromatography device with concentric electrodes and spiral microfluidic channels, produced according to MEMS technology subject to this invention; is composed of 4 groups of effect electrodes, inlet electrodes, spiral zone and central span, having exterior upper electrode (1), interior sub electrode with 3D geometry (2), upper inlet electrode (3), sub inlet electrode (4), spiral zone (5), central span (6), constant reading point and Insulating wafer (7) as the main components.

Biocolloids, e.g. Cryptosporidium parvum oocysts, are removed from water by filtration using a packed bed of a granular filter medium, preferably MgO, establishing an electric field across the packed bed, perpendicular to the flow of the water through the packed bed. The packed bed is provided in an annular space between two concentric electrodes.