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| Number | Title | Issue Date |
| 7230215 | Heat generating device formed of heat generating diaphragm plates Disclosed herein is a heat generating device formed of heat generating diaphragm plates comprises an electrically conducting supporting frame and a plurality of heat generating diaphragm plates. The supporting frame consists of two coupled supporting plates facing a... | 06/12/2007 |
| 7161462 | Gas permeable resistor casing A resistor apparatus for containing broken pieces of an overheated resistor body is provided. The resistor apparatus includes a resistor body and a first and second lead wire electrically connected to opposite sides of the core. A gas permeable containment casing su... | 01/09/2007 |
| 7042328 | High power resistor having an improved operating temperature range A high power resistor includes a resistance element with first and second leads extending out from the opposite ends thereof. A heat sink of dielectric material is in heat conducting relation to the resistance element. The heat conducting relationship of the resista... | 05/09/2006 |
| 6943661 | Quick-connect positive temperature coefficient of resistance resistor/overload assembly and method A positive temperature coefficient of resistance resistor/overload (PTCR/OL) resistor assembly that can be quickly and easily electrically connected and disconnected from equipment without the need for special tools or equipment. In some arrangements of the present ... | 09/13/2005 |
| 6917278 | Resistor banks A Resistor bank has first and second supporting member. Held on to the supporting members is a resistor element comprising a strip of resistor material which is bent into a zigzag shape. The strip is continuous and has a non-planar cross section profile. A plurality... | 07/12/2005 |
| 6430045 | Cooling resistor banks Resistor bank cooling apparatus 1 has an enclosure 2 surrounding a resistor bank 4. At least one first vane 6 directs into the enclosure 2 air flowing past an open side 12 thereof, which open side 12 is not a side facing the direction from which the air f... | 08/06/2002 |
| 6166619 | Overcurrent limiter having inductive compensation Current limiters, preferably PTC resistors, are used for limiting short-circuit current when connected in series to capacitors and converter valves. Protective devices operating with these PTC resistors are able to work reversibly and respond without arci... | 12/26/2000 |
| 6081183 | Resistor adapted for use in forced ventilation dynamic braking applications A continuous ribbon resistor element having a plurality of conjunctive lengths alternately connected by reflexes is supported in a frame comprised of silicon bonded laminated mica. The ribbon elements are formed with a single, flat convolution center offs... | 06/27/2000 |
| 5068637 | Plate-like metal element for electrical resistor grid assembly For use in a welded resistor grid assembly moving a plurality of generally parallel, relatively think plate-like metal elements disposed between a pair of spaced-apart insulating support members having a plurality of slotted openings in their opposing sid... | 11/26/1991 |
| 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 |
| 4935687 | Electrical heat exchange device An electrical heat exchange device comprising a plurality of electrically conductive metal plates secured side by side in spaced apart relationship by electrically insulating spacer means. Each of the plates has a plurality of conductive path sections for... | 06/19/1990 |
| 4855570 | Electric fluid heating unit having radial PTC ceramic heating elements An electric heating unit for heating fluid, such as air in a hair drier, includes two ring-shaped electrodes and a plurality of spaced, plate-like ceramic heating elements having a positive temperature coefficient of resistance (PTC) aligned between the e... | 08/08/1989 |
| 4794227 | Electrical resistance heater element for room air heater A resistance heater element for an electric room heater includes a resistive heating conductor (1) supported by an insulating support (2) mounted on the support flange (9) of an electric fan (4) in the heater which passes a stream of room air across the c... | 12/27/1988 |
| 4658234 | Resistor network A resistor network having resistor elements disposed equally spaced apart in parallel relation to each other and one or more insulation substrates to which the resistor elements are rigidly mounted. The substrates and the elements are all enclosed in a re... | 04/14/1987 |
| 4117308 | Explosion-proof electric air heater An electric heater, particularly adapted for supplying heat to hazardous areas where the atmosphere in the area contains particles or fumes that are readily ignited. The heater includes one or more heat radiating members, each cast about a sheathed electr... | 09/26/1978 |
| 4039774 | Portable hair dryer A portable hair dryer comprising an elongated casing of circular transverse cross-section and including a handle portion at one end an air discharge nozzle portion at the opposite end and an enlarged diameter intermediate section housing operative element... | 08/02/1977 |
| 3988709 | Electric motor controlling relay A thermistor sandwich assembly connectable for controlling motor starting windings is enclosed in a relatively thin and conforming case. The sandwich assembly includes a contact plate abutting the case lower wall with plate integral spring fingers against... | 10/26/1976 |
