Abstract: Method and device to feed tuyeres in an electric furnace, the tuyeres comprising a central conduit to deliver a comburent gaseous substance and a peripheral conduit to deliver a cooling gaseous substance, the method providing to send to the central conduit a comburent mixture consisting of oxygen and neutral gas (N2, Ar, etc.) in defined percentages, the oxygen and the neutral gas being fed, for each of the tuyeres, to a mixing device with a high mixing capacity, at least the pressure of the neutral gas being able to be adjusted on the relative feed line so as to modulate the pressure of the mixture according to the characteristics of the melting process.

Abstract: A system is disclosed for assembling a composite, self-baking electrode for electric arc furnaces. The electrode includes an outer metal ferrule, a central column of prebaked carbon or graphite sections assembled by nipples. New sections are added to the column from carbon paste placed between the ferrule and the central column. The assembling system principally includes a support that is vertically mobile over a length greater than the length of each of the sections. The support suspends the central column. A device is provided for temporarily blocking the column and a clamping device applies a preset torque to a newly added section while the blocking device temporarily blocks the column from movement thereby screwing the newly added section to an adjacently positioned section of the column.

Abstract: An electrode seal for an electric arc furnace comprises an annular support ring having an internal diameter substantially greater than the diameter of the electrode, and which is secured to the furnace roof by a plurality of mounting feet. The annular support ring has an upper annular sealing surface on which is supported an annular sealing ring having an internal diameter which is approximately the same as the diameter of the electrode to form a substantial seal therewith. The sealing ring has a lower annular sealing surface which engages the upper sealing surface of the support ring, while allowing limited sliding movement of the sealing ring along its lower annular sealing surface.

Abstract: An insulating support structure for a helical wire heating coil for an electric resistance heating element includes a plurality of insulating standoff members supported by a metallic support frame. The insulating standoffs each include a pair of wedge portions that are used to separate the individual convolutions of the helical wire heating coil. Located inwardly from each of the wedge portions are a pair of V-shaped coil grooves sized to receive a portion of an individual convolution of the helical wire heating coil. A retainer tab extends into and forms one surface of the coil groove such that the wire heating coil contacts the retainer tab and a pair of contact surfaces that define the coil groove. The insulating standoffs are each supported by an arm contained on the support frame. Each of the arms includes a pair of tines which combine to form an open slot within the arm. The insulating standoff is captured between the tines by a pair of locking projections on the outer end of the tines.

Abstract: A plasma processing system provided with a vacuum chamber for accommodating a substrate and for generation of plasma in a space in the front of the same, an antenna provided at the vacuum chamber, and a high frequency power source for supplying high frequency power to the antenna. The antenna emits high frequency power, generates plasma inside the vacuum chamber, and processes the surface of the substrate by the plasma. In the plasma processing system, the antenna has a disk-shaped conductor plate having a predetermined thickness. A coaxial waveguide having a folded portion is formed around the disk-shaped conductor plate. The folded portion of the waveguide is provided with a short-circuit 3 dB directional coupler having an impedance matching function. The antenna having the above structure prevents the generation of a standing wave in the high frequency wave propagation path from the high frequency power source to the vacuum chamber and generates high density plasma by supply of a large power.

Abstract: A current-conducting arm for conducting a current from at least one cable supports to an electrode in an electric arc furnace comprising an arm housing having a U-shaped base channel member and a U-shaped top channel member. Both channel members have a first and second wall, with the top channel member being inverted such that the first wall of the top channel member can be joined with the first wall of the base channel member, and the second wall of the top channel member can be joined with the second wall of the base channel member. The arm housing therefore has four annular corners to improve the conduction of current through the arm housing to the electrode. The invention further includes a spring assembly used to provide to aid an electrode holder in clamping the electrode. Moreover, a laser pointer is included for guiding the positioning of the arm housing in the electric arc furnace.

Abstract: An internally temperature controlled heat blanket. The heat blanket includes an outer layer of protecting foam fiberglass that affords operator safety, a layer of closed cell silicone foam which provides thermal and electrical insulation, a layer of thermally conductive mesh, another layer of thermally conductive silicone with holes cut into it, the holes containing positive temperature coefficient (PTC) heating elements, another layer of conductive mesh, a layer of thermally conductive silicone, and an inner layer of moderately conductive cured silicone or foam.

Abstract: An apparatus and method for infinitely variable adjustment of temperature range of a device in multiple selected temperature ranges. The method includes providing a plurality of operational temperature ranges of the device, selection of a desired temperature range, and infinitely variable selection of a specific temperature within a selected range. The apparatus includes a temperature range mechanism limiting operational temperature to first and second temperature ranges, and a control mechanism to select one of the first and second temperature ranges and then infinitely adjusting temperature within the selected range. In the example of a clothes dryer, the invention allows the selection of a higher or lower temperature range for the clothes dryer and, once the range is selected, infinitely variable temperature control within the selected range.

Abstract: A soft heater, containing metal, carbon or conductive ink coated textile threads, embroidered on, laminated between or woven into a nonconductive substrate to form electrical heating circuits. The heating element may be manufactured in a form of strip, sheet, sleeve or strand of electrically conductive threads for incorporation into plurality of articles. The heating element is shaped or embroidered in a desired pattern. The embroidered heater may be used for a night vision identification purposes.

Abstract: A kitchen cooktop surface in a material of nature, such as marble may be fitted with induction heating elements providing higher efficiency than mere placing in contact with the lower side of the cooktop. According to the invention the cooktop is hollowed out from the lower side, leaving only a thin partition which is reinforced by means of casting in situ of a ferromagnetic particle loaded material. Alternatively, the top surface may be penetrated, and a central circular piece of the cooktop material may be retained by means of similar casting in situ.

Abstract: A system for transforming electrical energy into thermal energy, already diffused has a flat support, and a substantially continuous heat-emitting surface formed by one or more electrically conducting continuous strips, each having a constant thickness, laid flat in parallel lengths and spaced for electrical insulation, the strips being arranged on the flat support and mechanically connected to it.

Abstract: An induction heating coil for joining structural members by heating a bonding material disposed between the structural members includes first and second elements with complementary shapes spaced equidistantly apart along the length of opposing surfaces of the structural members. Bases and risers connected to the first element to a source of high frequency electrical current. Conductive elements connect the first and second elements into a single turn coil. The first and second elements, and at least the riser, are formed of hollow, tubular members to form a coolant flow path therethrough.

Abstract: A sealing device for sealing non-circular, in particular polygonal, for example tetragonal, hexagonal, octagonal or elliptical, container openings comprises one or a plurality of induction loops (11, 38, 41) for sealing purposes. Containers (2) comprise joined-on closure devices (3) with sealing discs (15) joined onto a sealing edge (14) of the container opening. The induction loops (11, 38, 41) are adapted to the shape of the sealing edge (14) and the spacing between the induction loop (11, 38, 41) and sealing edge (14) is constantly adjustable and selectable.

Abstract: The drive part for converting the revolution movement to the wobble movement is composed of the shaft for transmitting the drive force from outside, the swash plate rotated by the shaft and the wobble plate for converting the revolution movement of the swash plate to the wobble movement. Plural pistons are reciprocated in responsive to the wobble movement of the wobble plate. The crank room containing the swash plate, the wobble plate and the piston is separated into the fuel room and the drive room by the bellows. The bearings for transmitting the drive force between the shaft in the drive room and the swash plate, and the bearing for transmitting the drive force between the swash plate and the wobble plate are placed inside the drive room in order to lubricate the bearings. By arranging plural pistons inside the fuel room, the fuel is forced to be taken in and discharged by the reciprocate movement of the individual pistons.

Abstract: The invention is to offer such a carbon electrode of less consumption and a long useful life and a method of fabricating the same which prevents particles from falling from carbon electrodes into a melting quartz glass, checks occurrence of bubbles in the quartz glass, and avoids lowering of single crystallizing yield by bubbles existing in a transparent layer formed in the vicinity of an inside surface of a quartz glass crucible when lifting silicon single crystal by using the quartz glass crucible made by using the carbon electrodes. The carbon electrode to be used for melting quartz glass by an arc discharge, is characterized in that an electrode material is composed of carbon of bulk density being 1.80 g/cm3 or higher and a three-point bending strength being 35 MPa or higher.

Abstract: A water heater having a water tank and multiple electric resistance heating elements extending into the water tank for heating water in the tank. The water heater includes a proportional band temperature controller for conducting electric power to the electric resistance heating elements in bursts. Each burst of electric power is followed by a period during which the temperature controller does not conduct power to the electric resistance heating element. In one embodiment, each burst of electrical power lasts for about 95% or less of a cycle comprised of one burst of electric power followed by the period during which the temperature controller does not conduct electric power. Further, activation of the heating elements by the controller is carried out in a sequential or other timed or controlled fashion to permit uniform heating of the water in the tank.

Abstract: A heater box for PCB boards uses open cell metal foam as a heat sink and diffuser of heated gas. The heated gas is dispensed through a metal fabric mesh and then to the PCB to be heated. The gas is introduced under pressure and flow regulated to conduits in the metal foam diffuser. The conduits have side holes that allow the gas to diffuse evenly through the foam. The gas is heated by electrical resistance heaters built into the conduits or by a resistance heated layer between the conduits and the foam. The frame that holds the PCB to be heated and the metal fabric mesh and the heater box itself are all laterally floating with respect to each other.

Abstract: An first induction hardening coil assembly according to one embodiment of the present invention comprises a coil having a top surface, an underside surface, and an inner coil curvature disposed between the top surface and the underside surface. The inner coil curvature extends approximately 180 degrees around a coil axis. The coil further includes a first end section adjacent a first end of the inner coil curvature which extends between the top surface and the underside surface. A second end section adjacent a second end of the inner coil curvature extends between the top surface and the underside surface. A support arm is connected to the coil and is constructed and arranged for providing an electrical connection between the coil and a source of electrical current. The support arm includes a current-in portion connected to the underside surface adjacent the first end section and a current-out portion connected to the top surface at a location which is between the first and second end sections.

Abstract: A drying device capable of keeping substantially constant the temperature of a moving recording sheet and evenly drying it without increasing radiation heat. Though the surface temperature of a recording sheet is lower on the upstream in the drying region and the temperature of outside air blown into the drying region is lower, the temperature of the recording sheet moved in the drying region is kept substantially constant by making the output of the upstream halogen lamp larger than that of the downstream halogen lamp. Even if the airflow velocity in the drying region is different, the radiation heat amount is adjusted according to the velocity to keep substantially constant the temperature of the recording sheet moved in the drying region. Thus, the recording sheet can be evenly dried and even if a jam of the recording sheet occurs in the drying region, there is no possibility of scorching, fuming or the like.

Abstract: An upright radiant electrical heater has a reflector assembly supporting a vertically-extending heating element assembly that radiates energy through substantially 360 degree. The reflector assembly includes heat reflective panels that disperse heat horizontally over substantially 90 degrees through an open grill at the front of the heater and vertically in a substantially uniform manner so that hot spots are avoided. A fan forces room air into the heater from below the reflector assembly, upwardly through an air passage behind the assembly into an open control chamber at the top of the heater, and outwardly into the room through ducts along the top front edge of the assembly. A thermostatic control for the heating element assembly and the fan motor is located in the air passage at the top of the heater. The flowing air maintains the exterior of the heater relatively cool to the touch, allowing parts of the housing to be molded from a thermoplastic material into aesthetically-pleasing shapes.