Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7541911 | Resistance plate and liquid level detection apparatus provided with said resistance plate In a resistance plate, a first slide portion includes a plurality of first conductive segments arranged at intervals generally in a direction of sliding movement of a sliding arm, the adjacent first conductive segments being connected together via a resistor. A firs... | 06/02/2009 |
| 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 |
| 7342201 | Silcon carbide element A ceramic heating element arrangement in which a ceramic heating element made of SiC having electrical NTC (negative temperature coefficient) properties is provided for a circuit. At least one segment is provided in the circuit, whose resistance saturates at least q... | 03/11/2008 |
| 7314593 | Process for preparing improved silicon carbide powder Improved silicon carbide powder is prepared by carbothermal reduction of silica by introducing β-SiC powder simultaneously with iron in the starting composition resulting into a precursor powder which after complete reduction contains at least 90% SiC preferably ri... | 01/01/2008 |
| RE39660 | Surface mounted four terminal resistor An electrical resistor has a surface mounted four terminal current sensor of a very low resistance value and capable of handling short pulses of high power. It comprises a flat metal late, 1 to 50 mils thick, of an alloy of high electrical resistivity, to which are ... | 05/29/2007 |
| 7145430 | Electrical component and method for making the component An electrical component which has a base body that comprises a ceramic material and at least two contact regions arranged on the base body to which terminal elements are secured, is enveloped by a protective layer containing organic constituents, and has an intermed... | 12/05/2006 |
| 7091820 | Methods for manufacturing resistors using a sacrificial layer A microelectronic assembly, including a microelectronic element such as a semiconductor chip and a dielectric material covering the chip and forming a body having a bottom surface. The assembly includes conductive units having portions exposed at the bottom surface,... | 08/15/2006 |
| 7052925 | Method for manufacturing self-compensating resistors within an integrated circuit A method for manufacturing a self-compensating resistor within an integrated circuit is disclosed. The self-compensating resistor includes a first resistor and a second resistor. The first resistor having a first resistance value is initially formed, and then the se... | 05/30/2006 |
| 7053749 | Metal plate resistor A metal plate resistor includes a resistive body comprising a metal plate, and at least a pair of electrodes joined respectively to opposite ends of the resistive body, the electrodes being made of a highly conductive metal conductor. The resistive body has a main s... | 05/30/2006 |
| 7034653 | Semiconductor resistor A semiconductor resistor comprises a resistor body formed on a semiconductor substrate and first and second conductive terminals electrically connected to the resistor body at opposite ends thereof. The semiconductor resistor further includes at least first and seco... | 04/25/2006 |
| 6184775 | Surface mount resistor An improved surface mount resistor and method for making the same includes a body comprised of an elongated strip of electrically resistive material and a resistor terminal formed at each end of the resistive material. The resistive material is machined w... | 02/06/2001 |
| 6108212 | Surface-mount device package having an integral passive component The surface-mount device package comprises a pad located on a face of the surface-mount device, a solder bump bonded to the pad, and a terminal spaced radially apart from the pad. A terminal surrounds the pad in at least one common plane that bisects the ... | 08/22/2000 |
| 5999085 | Surface mounted four terminal resistor An electrical resistor has a surface mounted four terminal current sensor of a very low resistance value and capable of handling short pulses of high power. It comprises a flat metal late, 1 to 50 mils thick, of an alloy of high electrical resistivity, to... | 12/07/1999 |
| 5525956 | Electrical terminal construction for an electronic component An electrical component has a terminal construction allowing it to be electrically and mechanically connected to an electrode. A terminal made of a metal material is mounted on an insulating substrate which has front and rear surfaces and is mounted on th... | 06/11/1996 |
| 5469131 | Hybrid integrated circuit device A resistive body of a hybrid integrated circuit has a resistance pattern on a resin film. Bonding pads permit connection of current through the resistance pattern. The resistance pattern may form part of a detecting bridge for overcurrent detection. One e... | 11/21/1995 |
| 5274351 | Resistance unit for motor speed control The present invention relates to a resistance unit for controlling a motor speed of driving a blower of an automobile air conditioner. The resistance unit includes a resistance circuit board printing a plurality of resistors in the form of double layers o... | 12/28/1993 |
| 5223820 | Adaptive lamp monitor with single piece sensor A lamp monitor provides a sense resistor for each lamp circuit as a special sense terminal member with a series resistance and sense terminals connected to a circuit board in a lamp monitor module. A multiplexing arrangement allows selection of the circui... | 06/29/1993 |
| 5218334 | Surface mountable high current resistor A surface mountable, high current resistor (20) is formed generally in the shape of an inverted "U". The top portion (22) of the inverted "U" is flat and contains one or more openings (26, 27) that serve to alter the resistivity of the resistor. The openi... | 06/08/1993 |
| 5200154 | Honeycomb heater having integrally formed electrodes and/or integrally sintered electrodes and method of manufacturing such honeycomb heater A honeycomb heater having integrally formed and/or integrally sintered electrodes comprises a honeycomb structure having a desired honeycomb configuration, and electrodes which are integrally sintered with the honeycomb structure at predetermined position... | 04/06/1993 |
| 5192940 | Flat resistance for blower control unit for automobile air conditioner and blower control unit using the same A flat resistance for a blower control unit of an automobile air conditioner, and a blower control unit using the same. The flat resistance includes: a porcelain enameled metallic substrate including a flat head portion, having an edge and one surface, an... | 03/09/1993 |
| 4983973 | Non-linear analog-to-digital converter A first film disposed in a first direction on an integrated circuit chip and having uniformly spaced taps provides progressively increasing resistance values. A second film disposed on the chip in a direction opposite to the first direction at a position ... | 01/08/1991 |
| 4928102 | Flash analog-to-digital converter with logarithmic/linear threshold voltages A plurality of equally spaced terminals may be disposed at a side edge of a substantially uniformly resistive thin film. A reference potential (e.g. ground) may be applied to the second side of the film. An energizing voltage may be applied at the junctur... | 05/22/1990 |
| 4841496 | Appliance timer An appliance timer includes a motor driven cam carried in a housing. A switch blade carried in the housing is responsive to the cam to selectively activate one of a pair of switch circuits, each of which provide a different operating level for an applianc... | 06/20/1989 |
| 4816645 | Method for the manufacture of a heating unit The invention is directed to a method for the manufacture of a heating unit comprising an insulating body having a front and a back side, one or several heating conductors arranged on the front part of the insulating body, and contact and fastening elemen... | 03/28/1989 |
| 4741692 | Burner igniter with a ceramic heater In a burner igniter using a ceramic heater, the resistance of the ceramic heater is detected to perform feedback control so that the temperature of the heater is maintained substantially constant to prevent both misfiring and overheating, while rapid temp... | 05/03/1988 |
| 4736183 | Oxide resistor A composite sintered oxide resistor comprising crystal grains of zinc oxide and crystal grains of a zinc oxide compound of other metal or semi-metal element than zinc, and a grain boundary layer having an electric resistance equal to or lower than that of... | 04/05/1988 |
| 4711990 | Ceramic heater The ceramic heater of the present invention is used for regenerating a fine particle collecting filter which is exposed to exhaust gases at elevated temperatures. In this ceramic heater, which is capable of being cantilevered, two electrode portions are p... | 12/08/1987 |
| 4671058 | Heating device A heating device of the present invention has a heating element of a substantially V-shape and is made of a ceramic material having electric conductivity. Electrode plates are respectively mounted at both ends of the heating element for energizing the hea... | 06/09/1987 |
| 4656339 | Electrical resistance heater The heater of the present invention includes a paper or plastic substrate on which is printed a semi-conductor pattern (typically a colloidal graphite ink) having (a) a pair of longitudinal stripes extending parallel to and spaced apart from each other an... | 04/07/1987 |
| 4644133 | Ceramic heater A ceramic heater has a heater element made of a mixture including MoSi2 and Si3 N4 powder as a main ingredient and silica (SiO2) powder as an additive, a heater support member made of an electrically insulating ... | 02/17/1987 |
| 4633068 | Electrical heating device An electrical heating device comprises a substrate, a pair of parallel, spaced apart elongated conductors extending longitudinally of the substrate, and a semi-conductor pattern carried on the substrate and electrically connected to and extending between ... | 12/30/1986 |
| 4505032 | Method of making a voltage divider An apparatus relating to a voltage divider having one or more Kelvin connection taps, including first and second spaced terminals and a current carrying resistor between the first and second terminals. A third terminal is spaced from the resistor and the ... | 03/19/1985 |
| 4503418 | Thick film resistor A novel construction for a thick film resistor is disclosed. A substrate has a first face deposited with a layer of resistive material. Between the substrate and this first layer is located a strip of conductive material. The strip of material is oriented... | 03/05/1985 |
| 4486651 | Ceramic heater A ceramic heater comprising a supporting member made of an electrically insulating ceramic and a heater element made of a ceramic having excellent oxidization resistance, thermal shock resistance and high bending strength at a high temperature is disclose... | 12/04/1984 |
| 4485297 | Electrical resistance heater The heater of the present invention includes a paper or plastic substrate on which is printed a semi-conductor pattern (typically a colloidal graphite ink) having (a) a pair of longitudinal stripes extending parallel to and spaced apart from each other an... | 11/27/1984 |
| 4475099 | Voltage divider An apparatus relating to a voltage divider having one or more Kelvin connection taps, including first and second spaced terminals and a current carrying resistor between the first and second terminals. A third terminal is spaced from the resistor and the ... | 10/02/1984 |
| 4475029 | Ceramic heater A ceramic heating element is held in a metal housing to be mounted on an internal combustion engine, so that the heating element is operated as a glow plug for igniting an air-fuel mixture. The ceramic heating element is formed of an electrode section hou... | 10/02/1984 |
| 4470034 | Electrical resistor structure An electrical resistor is described which is comprised of a resistor core having at least one electrically conductive end cap mounted thereon. The end cap is in electrical contact with the butt end portion of the core and electrically insulated from the s... | 09/04/1984 |
| 4449039 | Ceramic heater A ceramic heater having a heating element of a sintered mixture comprising alumina and titanium nitride and/or titanium carbide. The heating element has a specific resistance in a range from 10-4 to several Ωcm. The ceramic heater may have sup... | 05/15/1984 |
| 4443361 | Silicon carbide resistance element Silicon carbide shapes of the general type shown and described in U.S. Pat. No. 4,125,756 are densified and nitrided in such a way as to produce shapes with improved durability and reduction in temperature span in response to voltage changes.... | 04/17/1984 |
