315results about How to "Reduce arcing" patented technology

A catheter assembly for pressure-sensitive control of ablation treatment is disclosed. The assembly includes a conductive element, an electrode, and a pressure sensitive conductive composite member positioned between the conductive element and the electrode. At least one of the conductive pin, the pressure sensitive conductive composite element and the ablation electrode are moveable to create an engagement position and a non-engagement position. In the engagement position, the elements are electrically coupled such that ablation energy may be delivered from the conductive pin to the ablation electrode via the pressure sensitive conductive composite element. In the non-engagement position, the elements are electrically decoupled such that ablation energy is not delivered to the ablation electrode. A related method for pressure-sensitive control of ablation is also disclosed.

To avoid arcing and shorting within a field emission device, a bottom portion of a gate electrode is protected with an insulating material to avoid or reduce arcing among the electrodes and the electron emitters in the device. In a method for manufacturing such a field emission device, an emitter hole is formed through an insulating layer such that a portion of the gate electrode overhangs the hole and is protected on its underside by the insulating layer. The device can be used in display systems, such as CNT flat panel displays.

A microwave apparatus and system that monitors the amount of food products within a cavity and adjust the microwave power provided to the cavity. The apparatus and system uses a product sensor system and a movement sensor system to accurately determine the product load in the microwave cavity. A computer controller, based on the product load information provided by the product sensor system and the movement sensor system, operates to adjust the amount of power provide to the microwave cavities by the microwave transmitters.

The present disclosure relates to an electrode assembly for use with an electrosurgical instrument. The electrode assembly includes a pair of opposing jaw members and an electrode positioned on each jaw member. One or both of the electrodes includes a tissue contacting surface that has an outer periphery and defines a side surface depending therefrom. The tissue contacting surface and the side surface include a conjoining edge formed at a first predetermined angle that defines a first linear transition zone dimensioned to reduce arcing between the opposing jaw members during activation of the electrosurgical instrument.

Various contact systems and methods for manufacturing and using such are disclosed herein. Examples of the contact systems include a surface with one set of pads biased at a first voltage level, and another set of pads biased at a second voltage level. Such a contact system can be used, for example, to transfer power to an electromechanical device disposed thereon. In one particular example, the electromechanical device can include a power storage element and two or more couplings. When one of the couplings contacts a pad biased at the first voltage level, and another of the couplings contacts a pad biased at the second voltage level, a circuit is completed where some derivative of the differential between the first voltage level and the second voltage level is placed across the power storage element. Completion of the circuit causes the power storage element to charge. Power can be drawn from the power storage element to operate the electromechanical device.

A method for reducing wafer damage during an etching process is provided. In one of the many embodiments, the method includes assigning a bias voltage to each of at least one etching process, and generating the assigned bias voltage before initiation of one of the at least one etching process. The method further includes applying the assigned bias voltage to an electrostatic chuck before initiation of one of the at least one etching processes. The assigned bias voltage level reduces wafer arcing.

A method and apparatus may comprise a first number of layers of a flexible material, a second number of layers of a dielectric material, a first electrode attached to a surface layer in the first number of layers, and a second electrode attached to a second layer in one of the first number of layers and the second number of layers. The first number of layers may be interspersed with the second number of layers. The first electrode may be configured to be exposed to air. The first electrode and the second electrode may be configured to form a plasma in response to a voltage.

Methods and systems for obtaining improved computed tomographic reconstructions are provided. A camera obtains one or more images of a patient while a tomographic scan is performed. A CT scanner obtains one or more tomographic projections. The total number of the one or more tomographic projections obtained during the CT scan is determined. For each of the one or more patient images obtained, a processor correlates the patient image with the one or more tomographic projections, calculates a position of the patient and determines if the calculated position of the patient is greater than one or more predetermined constants. If it is determined that the calculated position of the patient is greater than one or more predetermined constants and a total number of the one or more tomographic projections obtained is less than a predetermined number, separate projections are substituted in the place of the one or more tomographic projections that were correlated to the patient image. If it is determined that the calculated position of the patient is greater than one or more predetermined constants and a total number of the one or more tomographic projections is greater than a predetermined number, the tomographic scan is aborted or the tomographic reconstruction is reconstructed on a reduced arc.

The invention is a hot-line job equipotential entering method of A.C. extra or ultrahigh voltage transmission line and the electric displacement rod. The method is characterized in that the operating staff wears extra or ultrahigh voltage A.C. hot-line job complete set barrier clothes and accesses the charged body by the insulated delivery vehicle after connecting the electric displacement rod and the barrier clothes, when operating staff is 0.4-0.6m from the charged body, the operating staff use the special electric displacement rod to contact the charged body in order to transfer electric potential and enter the equipotential. The electric displacement rod comprises a lead-in wire 7, a connector 8, a metallic rod 9 and a crampon 10, wherein the lead-in wire 7 and the crampon 10 are connected with two ends of the metallic rod 9 separately, the connector 8 is connected with the other end of lead-in wire 7, the metallic rod 9 is circular and has smooth surface. The invention reduces impulse current substantially, which improves the safety of entering the equipotential, extends the durability of barrier clothes, and improves the working efficiency of hot-line job.

The present invention is directed to ablation devices and methods utilizing pressure sensitive conductive composites, such as quantum tunneling composites, or other contact-sensitive, conductive polymers. The materials provide for electrodes and methods capable of differentiating between a soft and a hard push. The present invention thus provides an electrode for delivering selective electrical energy for ablation that may be varied based upon the pressure exerted on the surface area of the targeted tissue.

A device and method for operating automotive battery system relays and related switches. By aligning a magnetic field with a direction of current flow in a contact plate disposed between magnets that are producing the field, a generated Lorentz force can be used to promote arc extinguishing during a relay opening sequence, while simultaneously reducing the tendency of the Lorentz forces to interfere with the operation of a solenoid or other switch-activating mechanisms. By using a rotary-based mechanism to establish contact between a contact plate and current-carrying terminals, the likelihood of inadvertent opening of the relay is reduced. Such devices and methods may be used in conjunction with hybrid-powered and electric-powered vehicles.

A variable impedance composition according to one aspect of the present invention comprises a high electro-magnetic permeability powder in an amount from 10% to 85% of the weight of the variable impedance composition, and an insulation adhesive in an amount from 10% to 30% of the weight of the variable impedance composition. The incorporation of high electro-magnetic permeability powder including carbonyl metal, such as carbonyl iron or carbonyl nickel, in the variable impedance composition can not only suppress the overstress voltage, but also dampen the transient current. In contrast to the conventional electrostatic discharge (ESD) device, the relatively high electro-magnetic permeability carbonyl metal powder can reduce arcing as well as lower the trigger voltage of the device. The high electro-magnetic permeability characteristics can also absorb the undesirable electro-magnetic radiation that causes corruption of signal and loss of data.

Electro-kinetic air transporter and conditioner systems and methods are provided. A system includes at least one emitter electrode and at least a one collector (and likely, at least a pair of collector electrodes) that are downstream from the emitter electrode. An insulated driver electrode is located adjacent a collector electrode, and where there is at least a pair of collector electrodes, between each pair of collector electrodes. A high voltage source provides a voltage potential to the at least one of the emitter electrode and the collector electrode(s), to thereby provide a potential different therebetween. The insulated driver electrode(s) may or may not be at a same voltage potential as the emitter electrode, but should be at a different voltage potential than the collector electrode(s).

Embodiments of the present invention generally relates to substrate supports for use in a plasma processing chamber. The substrate supports, which are metallic, have ceramic inserts to prevent arcing between the substrate support and the shadow frame used to protect the edges of the substrate support during processing. In large area substrate processing chambers, the shadow frame may comprise multiple pieces. The individual pieces may be coupled together, but spaced slightly apart by a gap to permit thermal expansion. Ceramic inserts are positioned on the substrate support so that when a shadow frame is positioned adjacent thereto, the ceramic inserts are located adjacent the gaps in the shadow frame. The ceramic inserts adjacent the gap prevent and / or reduce the arcing because the gaps are located over electrically insulating material rather than electrically conductive material.

The invention provides an electrical contact based on powdered copper and a preparation process thereof. The electrical contact based on the powdered copper is prepared from the following materials in percentage by weight: 0.3 to 7 percent of nickel, 0.1 to 6 percent of boron, 0.1 to 8 percent of tungsten, 0.2 to 10 percent of graphite, 1 to 7 percent of titanium, 0.1 to 6 percent of molybdenum, 0.1 to 8 percent of diamond, 0.2 to 7 percent of lanthanum, 0.5 to 9 percent of aluminum, 0.5 to 8 percent of niobium, 0.1 to 5 percent of silicon, 0.1 to 6 percent of yttrium, 0.1 to 6 percent of chromium, 0.1 to 5 percent of cerium, and the balance of copper powder. The preparation process comprises the steps of mixing, cold pressing and sintering. In the preparation process, a general silver alloy contact is replaced by copper, so that the cost of silver alloy contacts of electric switches is reduced. The electrical contact based on the powered copper has high electrical performance and mechanical properties, and is a cheap substitute product of silver alloy materials of electrical contacts of low-voltage electric switches.

The present invention provides a ceramic cylindrical sputtering target characterized in being a single article having a length of 500 mm or longer and a relative density of 95% or greater. The ceramic cylindrical sputtering target is a single article having a high density and length of 500 mm or longer and therefore eliminates the need to use a stack of multiple sputtering targets in order to obtain a long target. Consequently, when the ceramic cylindrical sputtering target of the present invention is used in a magnetron rotary cathode sputtering target, and the like, there are no or few partitions in the target as a whole and therefore there is little arcing and particle generation during sputtering.

The invention discloses a large-size integral aluminum-neodymium rotary target material and a preparation method thereof. The preparation method comprises pretreatment and electric arc spraying priming on a stainless steel base back tube, carrying out ball milling shaping on aluminum-neodymium powder with purity of 99.99%, carrying out aluminum-neodymium powder plasma cold spraying on the stainless steel base back tube with a nickel-aluminum transition layer in vacuum or protective atmosphere so that the aluminum-neodymium rotary target material is formed. The aluminum-neodymium rotary target material has thickness of 3-16mm, target material relative density greater than 97%, purity of 99.99% and oxygen content less than 200ppm. The preparation method has the advantages of high vacuum spraying purity, low oxygen content, high cold spraying density and uniform microstructure and greatly improves target material quality. The prepared target material can be used in wide fields.

The invention relates to a circuit-breaker automatic closing contact device with high breaking capacity, which comprises a contact support, a rotating shaft, a fixed contact, a rotary dual-breakpoint moving contact installed on the contact support and a contact spring. The fixed contact and the moving contact are symmetrically distributed in relative to the rotating shaft, and an operating mechanism and an electromagnetic mechanism respectively drive the contact support to rotate through a control part of the operating mechanism and a control part of the electromagnetic mechanism of the contact device. Spring fixing shafts are symmetrically arranged on a shell on both sides of the contact support, one end of the contact spring is abutted against the shell, the other end is butted upon a torsion spring contact wire of the contact support, and the contact spring applies a torsion spring force to the contact support in the contact closing direction through the torsion spring contact wire. The automatic closing contact device without exogenic action has high breaking capacity, minimizes the influence of the contact spring on the breaking resistance of the moving contact while not reducing the reliable closing property of the contact, increases the breaking speed and the reliability of the contact and reduces arcing risk.

A plasma based ion implantation apparatus. The apparatus includes a first chamber in which plasma is generated, a coil antenna to generate the plasma in the first chamber, a second chamber in which ions of the plasma are implanted into a target, the second chamber having an incoming port through which the plasma is diffused from the first chamber to the second chamber, a power source to supply high voltage power to the target in the second chamber, and a grounded conductor positioned to face the target seated on the seating table. The first chamber is formed with a ring shape opening of a predetermined width at an upper periphery of the second chamber to communicate with the second chamber.

Embodiments disclosed herein generally relate to an apparatus having an anodized gas distribution showerhead. In large area, parallel plate RF processing chambers, mastering the RF return path can be challenging. Arcing is a frequent problem encountered in RF processing chambers. To reduce arcing in RF processing chambers, straps may be coupled to the susceptor to shorten the RF return path, a ceramic or insulating or anodized shadow frame may be coupled to the susceptor during processing, and an anodized coating may be deposited onto the edge of the showerhead that is nearest the chamber walls. The anodized coating may reduce arcing between the showerhead and the chamber walls and therefore enhance film properties and increase deposition rate.

The invention relate to breaker, especially to super high-voltage circuit breaker in use for GIS. The disclosed breaker includes breaking contactor mechanism, and operating mechanism for switching on / off resistances, and controlling action of breaking contactor mechanism. Through pull rod and regulating lever, one set of operating mechanism can control two sets of breaking contactor mechanism since technique of adjusting compression spring for moving contactor is utilized. The invention possesses breaking function at double speed, reduces kinetic resistance of moving contactor, and quickens breaking speed. Stepped breaking technique adopted in the invention lowers over voltage of operation greatly, as well as increases rated capacity and breaking capacity greatly. The invention also reduces cost of equipment and difficulties for manufacturing the disclosed breaker.

The invention discloses a construction method for a light steel skeleton special-shaped model suspended ceiling. The construction method includes the following steps that S1, elevation, position identification and paying-off are conducted on all regions of a site; S2, main electromechanical pipelines are installed; S3, a special-shaped model of the suspended ceiling is manufactured and installed; S4, hanging bars, a main keel and an auxiliary keel are installed; S5, auxiliary electromechanical pipelines are installed; S6, glass magnesium boards are used for pre-reinforcing the tail ends of the electromechanical pipelines and gypsum boards are installed; S7, electromechanical point positions at the tail ends of the electrochemical pipelines are tapped; S8, seam putty and overall basic-layer putty treatment is conducted; S9, surface layer coating is conducted on the suspended ceiling. Construction efficiency is high, labor intensity is small, and the constructed special-shaped suspended ceiling has good rigidity and toughness.

Described herein are methods and systems for using the treatment tip apparatuses and high-voltage connectors with robotic surgical systems. For example, retractable treatment tip apparatuses (e.g., devices, systems, etc.) including one, or more preferably a plurality, of electrodes that are protected by a housing (which may be retractable) until pressed against the tissue for deployment of the electrodes and delivery of a therapeutic treatment, are disclosed. In particular, these apparatuses may include a plurality of treatment needle electrodes and may be configured for the delivery of nanosecond pulsed electric fields. Also described herein are high-voltage connectors configured to provide high-voltage energy, such as nsPEF pulses, from a generator to the retractable treatment tip apparatuses.

An apparatus 20 for microwave vacuum-drying organic materials such as foods and bioactives has a plurality of microwave generators 50 actuated so as to cause interference between their respective microwave streams and evenly distribute the microwave energy across the vacuum chamber 34. The microwave-transparent window 36 in the chamber is arranged so the organic material to be dried is moved across it on a conveyor belt 60 and the microwave energy passing into the chamber 34 immediately encounters the organic materials, thus attenuating the energy and reducing arcing.

A contactor arc suppression system for an electric propulsion vehicle having an on-board diesel-electric power generating system for supplying electric power to a plurality of DC electric traction motors for propelling the vehicle in which the traction motors are operable in an electric power generating mode during electrical braking of the vehicle and the vehicle further has a dynamic braking grid selectively coupled in parallel with the traction motors for absorbing the generated electric power during such electrical braking. The system includes at least one contactor having a pair of contact tips arranged to selectively couple the dynamic braking grid into parallel circuit arrangement with the electric traction motors during electrical braking and a snubber circuit having a diode and a first capacitor connected in series circuit arrangement with the snubber circuit connected in parallel with the contact tips of the contactor. A protection circuit for the diode includes a first resistor and a second capacitor connected in series with the protection circuit connected in parallel with the diode. A second resistor is connected in parallel circuit arrangement with the diode for providing a current discharge path for the first capacitor upon closure of the contact tips.

A method and a connector arrangement for connecting and disconnecting an electrical generator, such as a prime mover driven alternator (10), to a circuit with an existing alternating current such as the mains electricity supply (20).

Various contact systems and methods for manufacturing and using such are disclosed herein. Examples of the contact systems include a surface with one set of pads biased at a first voltage level, and another set of pads biased at a second voltage level. Such a contact system can be used, for example, to transfer power to an electromechanical device disposed thereon. In one particular example, the electromechanical device can include a power storage element and two or more couplings. When one of the couplings contacts a pad biased at the first voltage level, and another of the couplings contacts a pad biased at the second voltage level, a circuit is completed where some derivative of the differential between the first voltage level and the second voltage level is placed across the power storage element. Completion of the circuit causes the power storage element to charge. Power can be drawn from the power storage element to operate the electromechanical device.

A device and method for operating automotive battery system relays and related switches. By creating a dual bipolar magnetic field adjacent the contactor portion of a switching mechanism in the relay, the magnetic field used to promote arc extinguishing is shifted, which in turn reduces the Lorentz force that forms as a byproduct of the field. Such a configuration has the potential for simultaneously maintaining arc-extinguishing capability and improving short-circuit withstanding capability while reducing the tendency of the Lorentz forces to interfere with the operation of a solenoid or other switch-activating mechanisms. Such devices and methods may be used in conjunction with hybrid-powered and electric-powered vehicles.