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| Number | Title | Issue Date |
| 7288749 | Electrical heating device and method of its manufacture An electric heating device based on a ribbon of crystalline metal foil with high specific resistance, which is additionally treated to increase its plasticity and/or additionally coated with a mold release agent to enhance compatibility of the ribbon and insulating ... | 10/30/2007 |
| 7183522 | Corrugated electric heating element and related radiant hotplate An electric radiant hotplate includes a base of electrically insulating material and a peripheral crown extending along the outer rim of the base and projecting upwards. A strip of resistive material is inserted in the base and is formed by a sequence of planar leng... | 02/27/2007 |
| 7164253 | Motor drive control apparatus On end of a reactor (L1) is connected to a positive electrode of a battery (B1) and the other end is connected to a power line via a transistor (Q1) and to the ground via a transistor (Q2). By PWM control of the transistors (Q1, Q | 01/16/2007 |
| 7061131 | Method and system for optimizing energy storage in hybrid off-highway vehicle systems and trolley connected OHV systems A hybrid energy system for propelling an off-highway vehicle includes an engine rated at a first power capacity, and a power converter driven by the engine for providing primary electric power. A traction motor system receives the primary electric power, the tractio... | 06/13/2006 |
| 7012392 | Multi-stage dynamic braking resistor network A multi-stage dynamic braking resistor network (23) is provided that includes a plurality of dynamic brake resistors (1a–d) for dissipating, as heat, regenerative energy inputted onto a system bus (17) by a motor or actuator (19)... | 03/14/2006 |
| 6201220 | System for fixing the heating resistance in a cooker plate The system for the attachment of a heating element in a electric cooking hob comprises a flat electrical element made of a thin resistance alloy strip, a horizontal porous insulating base (4) supporting the heating element (2) and a plurality of feet (3) ... | 03/13/2001 |
| 6127915 | High temperature platinum resistance thermometer and method of producing such A high temperature platinum resistance thermometer and a method of producing such a thermometer. Both a sensor frame and a protective tube are made of mon-crystalline synthetic sapphire, which has a melting point of about 2050° C. and effectively prevent... | 10/03/2000 |
| 5700992 | Zigzag heating device with downward directed connecting portions A heating device has a plurality of strip heating portions separated by a plurality of slits. The strip heating portions are connected to one another by connecting portions, thereby forming a heating surface in which a zigzag current path extends. The con... | 12/23/1997 |
| 5396214 | Dynamic braking grid resistor configuration for reducing EMI in an electric traction motor vehicle A dynamic braking grid arrangement for reducing EMI generated by dynamic or partial regenerative electrical braking of an electric traction motor powered vehicle coupled to a wayside power source by a third rail or catenary. The grid arrangement comprises... | 03/07/1995 |
| 5157373 | Post glover resistor A high power resistor grid assembly formed of a plurality of stainless steel resistor U-shaped elements arranged in a substantially parallel relationship welded together in a continuous path. Each element comprising a slotted rectangular sheet in a U-shap... | 10/20/1992 |
| 4994634 | Sheet switch A sheet switch comprises a pair of flexible insulative films, one of which is provided with a plurality of electrodes, resistances connected to the electrodes, respectively, and line patterns for externally connecting the electrodes via the resistances. T... | 02/19/1991 |
| 4847585 | Center ventilated resistor grid A resistor grid for diesel electric locomotives and the like has a rigid frame comprising outer metal side pieces and one or more pairs of inner metal side pieces spaced from each other, and columns of resistor ribbon fan-folded between each outer and out... | 07/11/1989 |
| 4845345 | Electrical heating element with meander-shaped windings An electrical heating element with a heat conductor in the form of meander-shaped windings, in which the individual windings are held in openings separated by solid parts in at least one insulating plate. For stabilization, especially with long, narrow de... | 07/04/1989 |
| 4837549 | Tapped resistor grid assembly In the assembly two or more strips of resistance material are positioned edge-to-edge and fan-folded between the side members of a frame. The strips are supported at their loops by insulated fixtures and each has a terminal at each end. The strips are emb... | 06/06/1989 |
| 4829282 | High efficiency high heat output electrical heater assembly A high temperature electrical resistance heater in which an electrically resistive strip is supported so that the strip may freely expand and contract and substantially all of the strip may directly radiate to provide maximum heat transport therefrom. The... | 05/09/1989 |
| 4801915 | Heating unit, in particular for bread toasters A heating unit, in particular for bread toasters, with a useful heat emitting area (2) and a waste heat emitting area (12), comprising an insulating body (1) and a heat conductor wound thereon. In bread toasters the efficiency of such heating units is con... | 01/31/1989 |
| 4789773 | Electrical radiant heater for heating heating surfaces An electric radiant heater (11) for heating a glass ceramic cooking surface (12) contains a dish-shaped insulator (14), to whose inner bottom surface (18) are fixed heater coils (20). The heater coils have an oval cross-section and are pressed by their na... | 12/06/1988 |
| 4649368 | Electrical resistance heating element A resistance heating element of the ribbon type for use in a high temperature electric furnace. The element has the same curved cross-sectional configuration throughout its entire length to give it strength and stiffness and permits the element to be bent... | 03/10/1987 |
| 4617548 | Current sensing resistance apparatus Current sensing resistance apparatus in the form of a single piece, unitary, U-shaped conductor fabricated from thin flat ribbon material to provide two parallel leg portions terminating in opposite bifurcated ends each pair of which are dissimilarly size... | 10/14/1986 |
| 4520487 | High temperature electric furnace with metallic resistances in the form of hollow vertical heating tubes A high temperature electric furnace has along its side walls vertical hollow electric resistance heating tubes (57) interconnected in serpentine fashion by conductive bridge plates (55). The tube ends and bridge plates are so contoured as to provide subst... | 05/28/1985 |
| 4161648 | Electrical radiation heater for a glass ceramic plate An electrical radiation heater for a glass ceramic plate, which serves as a cooking plate, comprises an electrical heating strip mounted on an insulating sheet. The heating strip is slit alternately from opposite edges to give it a zig-zag shape and is be... | 07/17/1979 |
| 4142062 | Material heating furnace and heating element A material heating furnace with a heating element formed of corrugated metal strips which are spaced at one of the ends thereof by a jumper strip which is welded or otherwise fastened to the metal strips. Also, terminals are provided which are slotted so ... | 02/27/1979 |
| 4112410 | Heater and method of making same A heater comprising a metallic tubular sheath in which an elongate electrical center conductor is coaxially disposed therewithin. A fibrous, inorganic electrical insulation material is wrapped around the center conductor and an electrical resistance heati... | 09/05/1978 |
| 4100526 | Grid resistor A frame supported grid resistor having a plurality of resistors of the ribbon type has located between adjacent ribbon resistors, strips of conductive material containing nonconductive bushings which engage and separate the adjacent ribbon resistors.... | 07/11/1978 |
| 4072921 | Low inductance precision resistor deposited on an adhesive backing and wound on a bobbin A precision resistor wherein the resistor wire is deposited in a sinuous pattern on the adhesive surface of a thin, flexible tape of electrical insulating material. In winding the tape onto a multibobbin coil form the intermediate flanges of the coil form... | 02/07/1978 |
| 4011395 | Electric furnace heater A generally rectangular, self-supporting, unitary high temperature electrical resistance heater adapted for generally horizontal suspension within a high temperature furnace in which the heating element is composed of a flat resistor ribbon folded to form... | 03/08/1977 |
| 3971912 | Fixing arrangement for fusing tower images In a copying machine a toner-image-bearing copy carrier moves in a predetermined direction along a predetermined path. A fixing arrangement fixes toner images by fusing the toner thereof. The fixing arrangement includes a heating winding having a pluralit... | 07/27/1976 |
| 3935376 | Ceramic insulator for supporting a ribbon-type heating element A ceramic insulator having sidewalls, a front wall and a back wall with an outwardly extending mounting shoulder at the upper end of the front and back walls; a passageway extending between the sidewalls of the insulator to form an open interior portion w... | 01/27/1976 |
