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Class Information
Number: 219/499
Name: Electric heating > Heating devices > With power supply and voltage or current regulation or current control means > Automatic regulating or control means > Comprising voltage and/or current measuring and comparing or combining means > Including bridge means
Description: Subject matter wherein the voltage or current measuring or comparison structure includes or comprises resistance or capacitance bridge means.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8653420 Temperature control circuit of oven controlled crystal oscillator Feb. 18, 2014
8357874 Radio frequency power supply Jan. 22, 2013
8283609 On die thermal sensor in semiconductor memory device Oct. 9, 2012
8203102 Thermal type flow sensor Jun. 19, 2012
8035060 Inkjet printhead with a plurality of vapor bubble generators Oct. 11, 2011
7994455 Control circuit for fast heating of a positive-temperature-coefficient heating component Aug. 9, 2011
7679354 Phase detecting device, phase control device including the phase detecting device, and fuser control device including the phase control device Mar. 16, 2010
7626144 Method and apparatus for rapid temperature changes Dec. 1, 2009
7598476 Image forming apparatus having improved flicker characteristics and method thereof Oct. 6, 2009
7589299 Electronic power control for cooktop heaters Sep. 15, 2009
7508671 Computer system having controlled cooling Mar. 24, 2009
7491911 MEMS bubble generator for large stable vapor bubbles Feb. 17, 2009
7404880 Sensor element Jul. 29, 2008
7304272 Systems and methods for adjusting parameters of a temperature sensor for settling time reduction Dec. 4, 2007
7247816 Heating apparatus, fixing apparatus, and image forming apparatus Jul. 24, 2007
7223946 Method and device for control and diagnosis for the heating of a lambda probe May. 29, 2007
7196294 Method and resistive bridge circuit for the detection of solder-joint failures in a digital electronic package Mar. 27, 2007
7002112 Heating apparatus for increasing temperature in short period of time with minimum overshoot Feb. 21, 2006
6974934 Remote reference resistor Dec. 13, 2005
6933476 Heating unit with temperature sensor Aug. 23, 2005
6849833 Logical flicker suppression for a temperature controlled heater load Feb. 1, 2005
6586712 Apparatus for limiting temperature Jul. 1, 2003
6586711 Current control method for an oxygen sensor heater Jul. 1, 2003
6429410 Circuit for heating a component Aug. 6, 2002
6307187 Operating procedure related to a resistance heating element and device for applying same Oct. 23, 2001
6198077 Temperature compensated timing circuit for use in heating appliances Mar. 6, 2001
6191398 Dry bath temperature control and method Feb. 20, 2001
6100510 Heating unit incorporating a temperature sensor Aug. 8, 2000
6097007 Aquarium water temperature controller Aug. 1, 2000
5981918 Circuit for temperature-dependent regulation of the heating current of seat heaters Nov. 9, 1999
5938961 Electronic controller for heating apparatus Aug. 17, 1999
5861610 Heater wire with integral sensor wire and improved controller for same Jan. 19, 1999
5847367 Circuit arrangement for controlling the temperature of a heating element Dec. 8, 1998
5705792 Digital temperature sensing conditioning and safety system with current control Jan. 6, 1998
5656189 Heater controller for atomic frequency standards Aug. 12, 1997
5464965 Apparatus for controlling temperature of an element having a temperature variable resistance Nov. 7, 1995
5424513 Method for producing transformers, especially transformers for distribution systems, and a device for carrying out this method Jun. 13, 1995
5360962 Heating appliance with transformerless power supply using low-loss passive divider to reduce AC line voltages Nov. 1, 1994
5354967 Hair styling appliance heater and control Oct. 11, 1994
5352868 Resistance feedback controlled power supply Oct. 4, 1994
5300758 Vapor detection with high speed gas chromatography Apr. 5, 1994
5120936 Multiplex heating system with temperature control Jun. 9, 1992
5025134 Means for refreshing a triac control circuit power supply Jun. 18, 1991
5021634 Temperature controlled soldering iron employing a variable resistance heating element for temperature sensing Jun. 4, 1991
4963246 Oxygen concentration-sensing device Oct. 16, 1990
4950872 Control circuit for a source of heat Aug. 21, 1990
4894513 Heatable windshield temperature control Jan. 16, 1990
4888471 An improvement in a device for high accuracy thermal regulations of an enclosure Dec. 19, 1989
4845342 Circuit for providing electrical energy to a heatable means Jul. 4, 1989
4778980 Instant-on fuser control Oct. 18, 1988

1 2 3

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