Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7378621 | Molybdenum silicide type element The present invention relates to an electrical resistance element of the molybdenum silicide type that includes two terminals (1, 2) for the supply of electric current and at least one leg (3) which extends between the terminals and which includes a gl... | 05/27/2008 |
| 7286039 | Chip resistor and method of manufacturing the same A chip resistor is provided which includes a resistor film 5 formed between a pair of terminal electrodes 2 and 3 on an upper surface of an insulating substrate 2. The resistor film is formed with two inward grooves 7, 8 and two tr... | 10/23/2007 |
| 7049928 | Resistor and method of manufacturing the same The resistor of the present invention comprises a substrate, a pair of electrodes, and a resistor element comprising rectangular sections connected to the pair of electrodes and a S-shaped section disposed between the rectangular sections and is free of trimming por... | 05/23/2006 |
| 7009146 | Heat exchanger for heating, and air conditioner for vehicle use A heat exchanger for heating comprises a plurality of heat transfer plate members (34) arranged in parallel with each other at predetermined intervals; and connecting portions (35, 36) for integrally connecting the plurality of heat transfer plate memb... | 03/07/2006 |
| 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 |
| 6737615 | Heat conductor coil for heating a flowing gaseous medium and electrical resistance heating element A heat conductor coil for heating a flowing gaseous medium is configured to be attached to a support configuration and has a heat conductor wound in windings following an ascending line of a coil to form the heat conductor coil, wherein the ascending line of the coi... | 05/18/2004 |
| 6593697 | Resistor assembly and cathode ray tube The invention relates to a resistor assembly for dividing an applied voltage into an intermediate voltage being below the applied anode voltage in a cathode ray tube. The resistor assembly comprises an insulating substrate and a resistive voltage divider ... | 07/15/2003 |
| 6570140 | Device for heating shrinkable sleeves A resistance element (19) for a device for shrinking shrinkable sleeves comprises an elongate electrical conductor extending in a zigzag pattern and bent to a tunnel shape. The shrinkable sleeve including for example an optical fiber enclosed therein is p... | 05/27/2003 |
| 6525395 | Chip-type composite electronic component and manufacturing method thereof An inductor obtained by laminating a plurality of ceramic layers having an internal coil conductor, and a thermistor obtained by laminating a plurality of ceramic layers having internal electrodes and having a predetermined resistance-temperature characte... | 02/25/2003 |
| 6470143 | Heating door with spring-mounted heaters A heating door comprises a frame. A first panel is mounted to the frame. A second panel is mounted to the frame. A sheet is disposed between the first and second panels. The sheet defines an inner section between the first panel and the sheet and an outer... | 10/22/2002 |
| 6441718 | Overlay surface mount resistor A surface mount resistor includes an elongated piece of resistive material having strips of conductive material attached to its opposite ends. The strips of conductive material are separated to create an exposed central portion of the resistive material t... | 08/27/2002 |
| 6184502 | Heater, particularly for kitchen appliances A heater (1) particularly usable as a radiant heater for electric cookers is described, which has a insulating substrate (2) of microporous thermal insulation material and at least one electric heating conductor (20) in the form of an upright, corrugated ... | 02/06/2001 |
| 6104276 | FBT, its bleeder resistor, and device for coupling bleeder resistor An FBT (fly-back transformer), its bleeder resistor (installed on the top of the FBT), and a device for coupling the bleeder resistor are disclosed. The bleeder resistor 100 is accommodated within a resistor case 180, and the resistor case 180 is installe... | 08/15/2000 |
| 6094129 | PTC thermistor and a current limiter device having at least one PTC thermistor PTC thermistors are used in reversible short circuit current limiters, in particular in series connection with electrical valves and/or capacitors. An electrically insulated, thermally conductive insulation or ceramic layer (20) is in contact electrically... | 07/25/2000 |
| 5977897 | Resistor string with equal resistance resistors and converter incorporating the same An integrated circuit includes a string of substantially similarly-shaped resistive cells, each cell having a first resistive portion and a second resistive portion, the string having an overall orientation and at least one cell, preferably substantially ... | 11/02/1999 |
| 5877674 | Resistor with elongated resistor element panels A resistor comprising a substantially continuous resistor element being formed into a plurality of element panels with each panel having at least two holes provided therein. Adjacent element panels are connected in series by a bend in the resistor element... | 03/02/1999 |
| 5686880 | Continuous weave resistor grid A resistor grid assembly has a continuous resistor weave with a plurality of generally parallel, plate-like electrical elements. U-shaped bends join two adjacent elements at adjacent ends. The U-shaped bends are located in a bottom group and a top group. ... | 11/11/1997 |
| 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 |
| 5304978 | Resistor grid assembly having "U" bend resistor elements A heat dissipating fabricated resistor grid for the dynamic braking of electric motors has a zigzag resistor supported by insulating members within a frame. The zigzag resistor is made up of a plurality of resistor elements formed from sheet metal, each e... | 04/19/1994 |
| 5079535 | Strain gauge and method of making and using the same A strain gauge primarily designed for dynamic measurements and requiring very little force to produce a change in length. The strain gauge is alternately concave and convex in shape, such as a sinusoidal curve with nodes of low resistance on the convex po... | 01/07/1992 |
| 5049852 | Resistor grid heat dissipating assembly A heat dissipating resistor grid has a frame including side members carrying blocks or panels of insulating material having cavities in their inner surfaces. The resistor element is a zigzag strip formed from individual flat lengths of resistance material... | 09/17/1991 |
| 5049851 | Embossed and lanced resistor structure A resistor grid for dynamic braking and the like has a fan-folded strip of resistance material mounted in a frame. The strip is embossed longitudinally so as to stiffen it between folds or loops and lanced or slit longitudinally between embossments from f... | 09/17/1991 |
| 5047827 | Integrated circuit resistor fabrication using focused ion beam A high value, precision resistor (10) includes a doped region (18) having a boustrophedonic (folded or meandering) shape formed in a substrate (12). At least one section of the doped region (18) is formed by implantation using a focused ion beam. Where th... | 09/10/1991 |
| 5045831 | Vertical flight resistor grid A resistor grid suitable for dynamic braking of diesel electric locomotives includes an upright rectangular frame with top and bottom members of insulating material and a strip of resistance material fan-folded into vertical flights between the top and bo... | 09/03/1991 |
| 5034721 | Heating element conveniently formed from flat blank The invention relates to a method of manufacturing a heating element from a flat metal foil blank in which strips (1) are formed whose ends (2) are interconnected by connecting portions (3, 4) with alternate connecting portions disposed at opposite ends o... | 07/23/1991 |
| 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 |
| 4859981 | Electrical resistor device The present device is an electrical resistor component which includes a cylindrical substrate of non-electrical conducting material. A meandering path (strongly resembling a plurality of hairpins laid end to end) of electrical conducting (but at the same ... | 08/22/1989 |
| 4804940 | Resistor and electron device employing the same A resistor is provided with a plurality of turn parts whose corners have an obtuse flexional angle in order to improve the relative resistance precision. A ladder resistor can be formed with a plurality of such resistors connected in series, and various e... | 02/14/1989 |
| 4713647 | Thermal vacuum heater array apparatus An electric resistance heater array having an open metal frame with multiple heater wires of heavy gauge, U-shaped Nichrome wire that are vertically spaced across the panel. The lower vertical portions of the heater wire are encased in ceramic sleeves whi... | 12/15/1987 |
| 4672269 | Built-in resistor for a cathode ray tube A structure for a resistor to be built into a cathode ray tube. The built-in resistor divides an applied anode potential into an intermediate focusing potential. The built-in resistor has a main resistor and an additional resistor means. The additional re... | 06/09/1987 |
| 4659912 | Thin, flexible, autoregulating strap heater A simple, highly flexible, virtually massless, temperature autoregulating heater primarily useful for soldering has an energizing circuit that may be integral with or separate from the heater element, which element has a ferromagnetic material energized v... | 04/21/1987 |
| 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 |
| 4588976 | Resistors obtained from sheet material These resistors are obtained from conductive sheet material, for example metal sheet material (usually referred to as "grids") in which additional plates are provided in order to distribute the current density and consequently to predetermine the temperat... | 05/13/1986 |
| 4584464 | Heating element An electrically energizable high intensity, radiant energy heater (8) having a general M-shape for providing a pocket (20) for localized high intensity isothermal heating for fusion and fiber processing. The heater is shaped to provide easy access for a f... | 04/22/1986 |
| 4553125 | High voltage resistance element A resistance element capable of withstanding a high voltage is formed through impurity diffusion in a single crystal island of a semiconductor integrated circuit substrate. The resistance element includes a resistive region formed in an exposed surface of... | 11/12/1985 |
| 4551614 | Electrical resistance heater unit An improved high intensity electricl resistance heater unit comprising one or more elongate thin metal foil ribbons adapted to be heated to a high temperature by passage of electricity therethrough, a thermally insulating rigid backing for supporting each... | 11/05/1985 |
| 4529958 | Electrical resistor The electrical resistor of the present invention comprises a flat metal plate having a thickness from 1 mil to 50 mils. A pair of electrical leads are operatively attached to the ends of the metal plate, and the side edges of the metal plate are provided ... | 07/16/1985 |
| 4467311 | Electrical resistor The electrical resistor of the present invention comprises a flat metal plate having a thickness from 8 mils to 50 mils. A pair of electrical leads are operatively attached to the ends of the metal plate, and the side edges of the metal plate are provided... | 08/21/1984 |
| 4429214 | Electrical heating panel A gypsum wallboard with electrical heating wire disposed in grooves arranged to minimize tendencies for the board to crack when lifted by the two opposite board ends.... | 01/31/1984 |
| 4318149 | RC Composite component with spark gap An RC composite component with a spark gap comprises a pair of discharge electrodes defining the predetermined spark gap and formed on a dielectric substrate. The discharge electrodes are coated with a film of varnish with a controlled thickness by the sc... | 03/02/1982 |
