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Class Information
Number: 219/497
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
Description: Subject matter including means for deriving at least one first voltage, the magnitude of which is dependent upon some variable of a heated space or material, means for producing a second reference voltage representative of a desirable condition, means for comparing or combining the two derived voltages and further means whereby the condition of a heating device is adjusted by application of the voltage resulting from the combination or comparison of the two or more derived voltages.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7626145 |
Redundant control circuit for hot melt adhesive hose assembly heater circuits and temperature sensors |
Dec. 1, 2009 |
| 7626144 |
Method and apparatus for rapid temperature changes |
Dec. 1, 2009 |
| 7619186 |
Intelligent user interface for multi-purpose oven using infrared heating for reduced cooking time |
Nov. 17, 2009 |
| 7619185 |
Image forming apparatus and electric-power control method |
Nov. 17, 2009 |
| 7619181 |
Heating system for bathing unit |
Nov. 17, 2009 |
| 7617764 |
Remote controllable automatic apparatus for preparing fried potato product from dehydrated potato |
Nov. 17, 2009 |
| 7616873 |
Thermo-plastic heat exchanger |
Nov. 10, 2009 |
| 7615725 |
Heater controlling apparatus for gas sensor |
Nov. 10, 2009 |
| 7615724 |
Electric water heater |
Nov. 10, 2009 |
| 7612315 |
System for controlling humidity |
Nov. 3, 2009 |
| 7612311 |
Methods and systems for controlling electric heaters |
Nov. 3, 2009 |
| 7608805 |
Control system for battery powered heating device |
Oct. 27, 2009 |
| 7605351 |
Redundant control circuit for hot melt adhesive hose assembly heater circuits and temperature sensors |
Oct. 20, 2009 |
| 7605349 |
Slow cooker and method of operation |
Oct. 20, 2009 |
| 7603204 |
System and method for controlling temperature of a liquid residing within a tank |
Oct. 13, 2009 |
| 7598476 |
Image forming apparatus having improved flicker characteristics and method thereof |
Oct. 6, 2009 |
| 7595467 |
Fault detection system and method for managing the same |
Sep. 29, 2009 |
| 7594343 |
Drying mode for automatic clothes dryer |
Sep. 29, 2009 |
| 7593789 |
Water flow detection system for a bathing unit |
Sep. 22, 2009 |
| 7586065 |
Electric cooker |
Sep. 8, 2009 |
| 7586064 |
Method and system for providing thermostatic temperature control in an integrated circuit |
Sep. 8, 2009 |
| 7582849 |
Thermal head, driving method and thermal head drive circuit |
Sep. 1, 2009 |
| 7577493 |
Temperature regulating method, thermal processing system and semiconductor device manufacturing method |
Aug. 18, 2009 |
| 7576304 |
Monitor device for monitoring the exposure of circuits to current and voltage from a tool |
Aug. 18, 2009 |
| 7573007 |
Power supply, image forming apparatus, and electric current supply method |
Aug. 11, 2009 |
| 7573006 |
Apparatus relating to the reconstruction of semiconductor wafers for wafer-level processing |
Aug. 11, 2009 |
| 7573005 |
Boil detection method and computer program |
Aug. 11, 2009 |
| 7569797 |
Electric liquid-heating |
Aug. 4, 2009 |
| 7566848 |
Catalytic combustion type gas sensor |
Jul. 28, 2009 |
| 7566846 |
Multi-zone blanket arrangement |
Jul. 28, 2009 |
| 7566845 |
Overheat protection circuit for power supply devices and direct-current power supply device |
Jul. 28, 2009 |
| 7560669 |
Method of thermal treatment of components |
Jul. 14, 2009 |
| 7557328 |
High rate method for stable temperature control of a substrate |
Jul. 7, 2009 |
| 7554061 |
Method for controlling the oven temperature, and temperature control unit |
Jun. 30, 2009 |
| 7514652 |
Spa with circuit for detecting excessive ground current |
Apr. 7, 2009 |
| 7508671 |
Computer system having controlled cooling |
Mar. 24, 2009 |
| 7507937 |
Electronic power control for cooktop heaters |
Mar. 24, 2009 |
| 7501605 |
Method of tuning thermal conductivity of electrostatic chuck support assembly |
Mar. 10, 2009 |
| 7498823 |
Physical quantity, particularly humidity detection device, and related detecting method |
Mar. 3, 2009 |
| 7498545 |
Electric motor controller in electric compressor |
Mar. 3, 2009 |
| 7495194 |
Heating apparatus and heating method |
Feb. 24, 2009 |
| 7491911 |
MEMS bubble generator for large stable vapor bubbles |
Feb. 17, 2009 |
| 7488921 |
Adaptive startup control method for electric drives |
Feb. 10, 2009 |
| 7473868 |
Fail safe HVAC temperature and medium presence sensor |
Jan. 6, 2009 |
| 7469840 |
Controller for a fuel fired water heating application |
Dec. 30, 2008 |
| 7454308 |
System for detection of waterlogging in steam heating coils |
Nov. 18, 2008 |
| 7449662 |
Air heating apparatus |
Nov. 11, 2008 |
| 7442902 |
Adaptive temperature controller |
Oct. 28, 2008 |
| 7435929 |
Methods for monitoring or controlling the ratio of hydrogen to water vapor in metal heat treating atmospheres |
Oct. 14, 2008 |
| 7423243 |
Heating system and method |
Sep. 9, 2008 |
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