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| Number | Title | Issue Date |
| 8174817 | Sealed and impregnated wound capacitor assemblies At least one wound film/foil or metalized film capacitor is sealed between its electrodes to form a sealed enclosed annular region between the interior of the enclosure, the electrodes and the exterior of the wound capacitor to form a sealed capacitor assembly. A fl... | 05/08/2012 |
| 8134835 | Compression clamping of semiconductor components The present invention relates to a clamping device for compression clamping of one or more semiconductor devices and associated semiconductor components with a desired compression force equally distributed across the opposing surfaces of the devices and associated c... | 03/13/2012 |
| 8130518 | Multiphase grid synchronized regulated current source inverter systems Electric power from typically unstable multiple dc sources is converted to ac electric power of suitable quality for injection into an electric power grid. Conversion is accomplished by current regulation of the output from the dc sources to the input of each one of... | 03/06/2012 |
| 7995639 | Pulse width modulated power inverter output control A method is provided for output control of a pulse width modulated power inverter used with a substantially resistive, single phase, ac load such as an electro-slag remelting furnace. In one application of the method, during each of the inverter's half cycle outputs... | 08/09/2011 |
| 7905341 | Handling system for multiple workpieces A handling system for multiple workpieces is provided for repeatedly lifting rows of multiple workpieces on a lift assembly from a collection of workpieces in a hopper and selectively delivering one or more rows of orientated workpieces to an exit conveyor. Any diso... | 03/15/2011 |
| 7903806 | Expert call analyzer and next generation telephony network configuration system A method and apparatus for determining and monitoring the status of telephone calls in a Next Generation Telephony Network (NGTN) is disclosed. The method detects protocols occurring between two or more network elements of a telecommunication circuit and control pro... | 03/08/2011 |
| 7896060 | Casting furnace An apparatus and process are provided for casting liquid metals into molds in a casting furnace comprising a controlled environment melt chamber and a mold lock chamber. A mold is supplied to the controlled environment melt chamber for a pour, and removed from the s... | 03/01/2011 |
| 7848383 | Cold crucible induction furnace with eddy current damping Apparatus and method are provided for damping the induced fluid flow, particularly in the region of the base plate, in an electrically conductive material that is heated and melted in a cold crucible induction furnace. Damping is accomplished by establishing a dc ma... | 12/07/2010 |
| 7874195 | Liquid proving system A liquid proving system is provided with a bottom drain liquid prover draining into a holding tank. The fill opening of the prover has a prover fill opening self sealing assembly that remains closed except when a nozzle used to pump liquid into the prover is pushed ... | 01/25/2011 |
| 7859872 | Load voltage-independent active power control of power converters The magnitude and wave shape of instantaneous power draw from a single phase alternating current power source to a power converter is controlled by a closed loop power control scheme independent of the direct current output voltage of the converter. A fast averaging... | 12/28/2010 |
| 7796674 | Cold crucible induction furnace A cold crucible induction furnace has a slotted-wall with a slotted inner annular protrusion that is disposed around the base of the crucible's melting chamber. The protrusions may be separated from the base by a gap that can be filled with an electrical insulating ... | 09/14/2010 |
| 7772530 | Induction heat treatment of workpieces An apparatus and process are provided for induction heating of a workpiece. The workpiece is moved through an inductor to inductively heat treat the workpiece with electric power of varying frequency and duty cycle or amplitude control to control the magnitude of el... | 08/10/2010 |
| 7753986 | Titanium processing with electric induction energy The present invention relates to a process wherein an intermediate form of titanium, namely titanium sponge, is produced by reduction of a feedstock of titanium in a reactant liquid bath, where the feedstock, titanium tetrachloride, is reduced by molten magnesium to... | 07/13/2010 |
| 7683288 | System and method of computing the operating parameters of a forge welding machine A system and method for computing the parameters of a forge welding machine for the forge welding of one or more materials is provided. A computer program executes a self-tuning routine to compute the operating frequency and operating power setting for the forge wel... | 03/23/2010 |
| 7598632 | Current fed inverter with pulse regulator for electric induction heating, melting and stirring A current fed inverter with duty cycle regulation of dc current to the input of the inverter is provided to increase the magnitude of inverter output power while operating a resonant load at resonant frequency. The regulator duty cycle period is synchronized to the ... | 10/06/2009 |
| 7582851 | Gradient induction heating of a workpiece An apparatus and process are provided for gradient induction heating or melting of a workpiece with a plurality of induction coils, each of the plurality of induction coils is connected to a power supply that may have a tuning capacitor connected across the input of... | 09/01/2009 |
| 7528351 | Billet support system for induction heating An apparatus and process are provided for supporting a billet inside an induction coil while the billet is being heated by electric induction. Two or more rails of a heat resistant ceramic material provide a curvilinear surface on which the billet can slide into and... | 05/05/2009 |
| 7525073 | Transverse flux electric inductors An apparatus and process are provided for inductively heating a workpiece to a desired cross sectional temperature. At least one pair of coils form a transverse flux inductor. The workpiece is located between the pair of opposing coils, which are oriented across the... | 04/28/2009 |
| 7497989 | Molten metal pressure pour furnace An apparatus and process are provided for discharging a dose of a molten metal from a pressure pour furnace. A heating chamber of the furnace is used to keep the molten metal at a selected temperature. A sealing port between the heating chamber and a pressure chambe... | 03/03/2009 |
| 7482559 | Transverse flux induction heating apparatus and compensators An apparatus and process are provided for inductively heating a workpiece by transverse flux induction. The apparatus comprises a pair of identical coils, each of which includes a reversed head section bent to the opposite side of the workpiece. The assembled pair o... | 01/27/2009 |
| 7476819 | Switch box for multi-directional activation of a ribbon switch A switch box is provided for converting a unidirectionally activated ribbon switch inserted in the switch box into a multi-directionally activated ribbon switch. At least two pairs of fingers protruding from the body of the switch box contact one or more posts protr... | 01/13/2009 |
| 7457344 | Electric induction control system An apparatus and process are provided for controlling the heating or melting of an electrically conductive material. Power is selectively directed between coil sections surrounding different zones of the material by changing the output frequency of the power supply ... | 11/25/2008 |
| D578751 | Combined hunting belt and bandolier | 10/21/2008 |
| 7383873 | Casting furnace An apparatus and process are provided for casting liquid metals into molds in a casting furnace comprising a controlled environment melt chamber and a mold lock chamber. A mold is supplied to the controlled environment melt chamber for a pour, and removed from the s... | 06/10/2008 |
| 7317177 | Electric induction heat treatment of an end of tubular material A magnetic flux concentrator is used to control the end heating of a tubular material in an electric induction heat treatment process. The magnetic flux concentrator may consist of fixed elements, or a combination of fixed and moveable elements to accommodate end he... | 01/08/2008 |
| 7300258 | Electromagnetic pump An electromagnetic pump has a supply section and a magnetic force pumping section wherein flow of a electrically conductive material through the supply section is opposite to the flow of the material in the magnetic force pumping section in some examples. Multiple c... | 11/27/2007 |
| 7291817 | Scan induction heating An apparatus and process are provided for scan induction heating of a workpiece. The workpiece is moved through an inductor to inductively heat treat features of the workpiece with electric power of varying frequency and duty cycle to control the magnitude of electr... | 11/06/2007 |
| 7279128 | Molten metal pressure pour furnace and metering valve An apparatus and process are provided for discharging a dose of a molten metal from a pressure pour furnace. A heating chamber of the furnace is used to keep the molten metal at a selected temperature. A sealing port between the heating chamber and a pressure chambe... | 10/09/2007 |
| 7253381 | Multi-frequency heat treatment of a workpiece by induction heating An apparatus and process are provided for multi-frequency induction heat treatment of workpieces including gears. High frequency power is applied to an induction coil that surrounds the workpiece so that a high frequency magnetic field couples with the workpiece to ... | 08/07/2007 |
| 7209373 | High voltage pulse generator A high voltage pulse generator utilizes an even number of Marx cells using L-C inversion topology. Each Marx cell is associated with an individual inverter transformer having a primary winding connected to the output of an ac power supply such as a series resonant i... | 04/24/2007 |
| 7205516 | Bonding of materials with induction heating An apparatus and process are provided for bonding of materials by induction heating of an electrically conductive material upon which a second material is bonded. The electrically conductive material is induction heated between a first induction heating plate, and t... | 04/17/2007 |
| 7197061 | Directional solidification of a metal A molten material can be heated, melted and directly solidified in a single vessel. Induction heating and melting of the molten material is achieved by magnetically coupling the field produced by current flow in a plurality of induction coils surrounding the vessel ... | 03/27/2007 |
| 7184279 | Solid state switching circuit A solid state switching circuit utilizes a transformer in series with the circuit's switching device by which energy initially stored in the primary of the transformer is recovered in resonant circuitry connected to the secondary of the transformer for transfer of t... | 02/27/2007 |
| 7167501 | Cold crucible induction furnace with eddy current damping Apparatus and method are provided for damping the induced fluid flow, particularly in the region of the base plate, in an electrically conductive material that is heated and melted in a cold crucible induction furnace. Damping is accomplished by establishing a dc ma... | 01/23/2007 |
| 7157710 | Corona discharge detection An apparatus and process are provided for detecting whether a corona discharge has occurred external or internal to equipment in which a broadband optical spectra sensor is placed. The broadband optical spectra sensor senses both the ultraviolet energy of the corona... | 01/02/2007 |
| 7132018 | Magnetic core insulation Disclosed herein is an insulating material between adjacent metal layers of a soft magnetic core, and a process for forming this insulating material. The insulating material is composed of the native metal oxides of the metallic core material. ... | 11/07/2006 |
| 7105204 | Apparatus and method for coating the exterior surface of a pipe The exterior surface of a pipe is coated around its full perimeter without rotation of the pipe or the complete coating apparatus. In one example, the coating apparatus includes coating heads attached to a rotor with the coating material supplied under positive air ... | 09/12/2006 |
| 7087870 | Induction heating or melting with multiple frequencies An apparatus and process are provided for multi-frequency induction heating of a workpiece. Switching devices are used to selectively add, remove or reconfigure capacitive elements in the circuit to change the circuit's resonant frequency, and consequently, the freq... | 08/08/2006 |
| 7077919 | Magnetic core insulation Disclosed herein is an insulating material between adjacent metal layers of a soft magnetic core, and a process for forming this insulating material. The insulating material is composed of the native metal oxides of the metallic core material. ... | 07/18/2006 |
| 7002789 | Capacitor assembly A capacitor assembly is formed from one or more capacitive elements placed between a pair of opposing brackets. Each bracket has at least one L-shaped section and an arcuate section. Each L-shaped section has a capacitor seating surface and an assembly connecting su... | 02/21/2006 |
