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| Number | Title | Issue Date |
| 7439473 | Method and arrangement for supporting vertically depending electrical resistance elements A method of supporting vertically hanging electrical resistance elements for heating furnaces or ovens in industrial operations. Each resistance element includes current-conducting legs that extend downward and upward a number of times, and the element includes alon... | 10/21/2008 |
| 6895660 | Manufacturing method of over-current protection devices The present invention discloses a manufacturing method of an over-current protection device, characterized in that the PTC plaque is conducted by punching under frozen state to form the over-current protection devices so as to reduce the heating and temperature risi... | 05/24/2005 |
| 6617955 | Positive temperature coefficient thermistor An inexpensive positive temperature coefficient thermistor has metal terminals which have been miniaturized without deteriorating the characteristics or sacrificing the reliability of the device. The metal terminals include supporting members and springs ... | 09/09/2003 |
| 6542066 | Electric assembly and device An electrical device comprising a pair of electrodes, three substrates, and PTC elements inserted between the substrates, each PTC element having metal layers on both surfaces, in which each of the outer substrates has a metal layer on the inner surface, ... | 04/01/2003 |
| 6188307 | Thermistor apparatus and manufacturing method thereof A positive-characteristics thermistor apparatus has an insulating case, positive-characteristics thermistor devices, planar terminals, and spring terminals. Whichever thermistor device has a lower resistance of the two thermistor devices is trimmed to hav... | 02/13/2001 |
| 6169472 | Thermistor system A PCT thermistor arrangement for use in a circuit for demagnetizing shadowmasks of color picture tubes, has at least two PTC thermistor elements which are designed as switching PTC thermistors, are or can be thermally coupled and are or can be electricall... | 01/02/2001 |
| 5596476 | Surge arrester with a mtal oxide resistor In a surge arrester with a multi-column arrangement of the metal oxide resistors within an insulating housing, each column is to be made of resistance elements in a mechanically self-supporting structure. To this end, the resistance elements of each colum... | 01/21/1997 |
| 5548468 | Surge arrester using zinc oxide elements installed in parallel, and method of forming the surge arrester An arrester has a plurality of laminated columns arranged in parallel, each having a plurality of nonlinear conduction elements. The columns are electrically interconnected by conductive connection members so that a conduction path is defined by the condu... | 08/20/1996 |
| 5535614 | Thermal conductivity gas sensor for measuring fuel vapor content A gas sensor of the thermal conductivity type suitable for the quantitative analysis of the fuel vapor content of a fuel-air mixture. The gas sensor (10) comprises a sensing element (28) and a compensating element (30), each of which includes an electrica... | 07/16/1996 |
| 5473141 | Radiant tube heating assembly A radiant tube heating assembly for a furnace, which assembly combines the features of a heating element utilizing the latest powder metallurgical technology, improved ceramic spacers and staggered weld joints to thereby enable higher efficiency and heati... | 12/05/1995 |
| 5386491 | Electrical appliance with U-shaped lamps having filaments of different power consumption An elctrical appliance for preparing food is provided which contains several incandescent lamps (2, 2') disposed side by side. Incandescent lamps (2, 2') for use in the appliance have a U-shaped tubular lamp vessel (4) in the first (8) and the second leg ... | 01/31/1995 |
| 5359316 | Zinc oxide type arrester A zinc oxide type arrester including: four constitutional units electrically connected in parallel and a closed container accommodating the constitutional units. Each of the constitutional units includes a first columnar stack body composed by stacking zi... | 10/25/1994 |
| 5142265 | Positive temperature coefficient thermistor device A positive temperature coefficient thermistor device includes an insulating casing housing a pair of positive temperature coefficient thermistors. Each of the inner surfaces of a pair of opposed walls consisting of the side walls and the top and bottom wa... | 08/25/1992 |
| 5003284 | Infrared radiator An infrared radiator includes a non-circular jacket tube made of quartz material, which may be quartz glass, the length of which is a multiple of the larger interior diameter and the interior of whch, in a sectional view, is separated into two areas, in e... | 03/26/1991 |
| 4939498 | PTC thermistor device with PTC thermistor unit housed in case A PTC thermistor device includes a case in which a holding plate made of metallic material is vertically arranged; and on each of both main surfaces of the holding plate, an electrode from a respective one of two PTC thermistor units is fixed. Therefore, ... | 07/03/1990 |
| 4630024 | Grid resistor and improved grid element therefor A grid resistor assembly includes a plurality of flat grid resistor elements. Each element includes at least one open-ended loop having side portions and a tip end portion connected together through intervening strip portions of narrower width than the si... | 12/16/1986 |
| 4207456 | Electrical infrared radiant heater An electrical infrared radiant heater in which a heater assembly includes an extruded ceramic holder having parallel holes, certain of which receive heating element wires through such holes. The ends of the heating element wires extend outwardly of the ho... | 06/10/1980 |
