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6927368 |
Method and apparatus for controlling power to a heater element using dual pulse width modulation control
A method for controlling power to an electrical load using dual pulse width modulation (PWM) to minimize in-rush current to the electrical load, such as a heater element. An output from a power...
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6884973 |
Heating pad controller with multiple position switch and diodes
A control circuit for a heating pad. The control circuit includes a two-pole, four-position slide switch. The four positions of the two-pole, four-position slide switch include off and three...
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6867395 |
Variable flow thermostat and method for variably controlling engine temperature
A variable flow thermostat, as applied to an internal combustion engine, provides a means for allowing the flow of coolant fluid from the engine block to the radiator to vary in response to the...
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6849833 |
Logical flicker suppression for a temperature controlled heater load
A temperature control system for reducing flicker in an electrical resistance heater comprising: an electrical resistance heater divided into at least two electrical loads and; a source of...
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6849834 |
Apparatus for cycle-skipping power control
In one embodiment of the present invention, a power controller for an AC load comprises: a user interface adapted to interact with a user to produce at least one user interface signal; and a...
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6833535 |
Method and control structure for a sensor heater
A control structure and method for controlling a sensor heater including a power supply connected to a switching device for pulse width modulating a voltage from the power supply. The switching...
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6806445 |
Image formation apparatus and heater control method
An image formation apparatus includes a fixing heater, and a zero-cross detector that detects zero-cross points of a frequency of an alternating current (AC) power supply connected to the heater....
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6781098 |
Heater controller for an oxygen sensor
A heater controller for an oxygen sensor associated with a vehicle engine. The controller includes a start detect section, a restart determination section, and a heater delay control section. The...
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6770853 |
PWM controller for DC powered heating blanket
A PWM-based controller for controlling a voltage applied to a DC-powered electric heating blanket from a power source includes a square wave producing circuit for connection in the circuit with the...
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6730886 |
Power control method and apparatus for minimizing heating time instant heating roller
A power control method and an apparatus for an instant heating roller (IHR) include the following steps and functions: (a) determining whether an external source voltage has a first level or a...
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6713731 |
Fast response, multiple-loop temperature regulator
An apparatus for regulating a temperature of an object to a desired temperature includes a feedback circuit operable to produce a feedback error signal based on a difference of the desired...
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6703592 |
System of controlling the temperature of a processing chamber
A CVD processing reactor employs a pyrometer to control temperature ramping. The pyrometer is calibrated between wafer processing by using a thermocouple that senses temperature during a steady...
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6691923 |
Low noise solid-state thermostat
A low noise solid-state thermostat is provided designed to operate on AC power over a wide range of frequencies (e.g., from 0 Hertz (Hz) to 1000 Hz). The thermostat incorporates a soft start turn...
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6680463 |
Power supply control circuit and cooking device
In the power supply control circuit, interposed between the power lines 1 a and 1 b is a serial circuit 21 constructed by connecting in series a radio interference suppression capacitor 2 ...
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6649884 |
Sanitary device
A sanitary device includes a microcomputer for controlling a temperature of a cleansing water in a heating water tank to a target value, a control substrate installing the microcomputer and a...
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6627860 |
System and method of temperature management for semiconductor material processing
A heat sensing device manager system and method for processing signals from heat sensing devices used to monitor the semiconductor processing environment. The system includes a circuit for...
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6624396 |
Conveyor speed control system for a conveyor oven
A control system is disclosed for controlling the speed at which an electric motor drives a conveyor to move products through a conveyor oven. The system includes a temperature sensor configured to...
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6580059 |
Control apparatus for a light radiation-type rapid heating and processing device
There is provided a control apparatus for a light radiation-type rapid heating and processing device in which a power factor can be improved, the influence of a higher harmonics strain can be...
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6571564 |
Timed container warmer and cooler
Disclosed is an invention related to a warmer and cooler for a container that is programmably timed to engage a heating and/or cooling unit. The invention may be adapted for use with a baby bottle...
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6566633 |
Thermal control apparatus and method for thermally controlling a plurality of objects within a predetermined temperature range
When controlling operation of heaters or coolers provided in a plurality of thermal control objects, the priority for turning on the heaters or the coolers set based on temperature and speed of...
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6563090 |
Electric heating blanket control circuit assembly
An electric heating blanket control circuit assembly is constructed to include an electric heater, a sensor adapted for detecting the temperature level of the electric heater, a controller, the...
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6548786 |
Circuit for driving a heater at a constant power
A current-limiting resistor is connected between a power-supply line and a heater provided near the oxygen-detecting element of limiting-current type oxygen sensor. A power MOSFET is connected...
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6538238 |
Long term calibration of sensor assembly for glass-ceramic cooktop appliance
A sensor assembly for glass-ceramic cooktop appliances includes an optical detector having an reference component and an active component. The active component is arranged to receive radiation from...
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6522844 |
Heater control apparatus and image forming apparatus having a plurality of heaters which are controlled to be changeably connected in a serial mode and a parallel mode so as to suppress flicker
A heater control apparatus is provided for controlling a plurality of heaters used for fixing operations of an image forming apparatus, wherein each of the heaters is incorporated inside one of a...
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6504134 |
Temperature controlling protection system for heater of wet etching device
A temperature controlling protection system for a heater of the wet etching device has a temperature controlling protection circuit and a heating ON/OFF controller, in which the temperature...
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6495805 |
Method of determining set temperature trajectory for heat treatment system
This invention is a method of determining set temperature trajectories for a heat treatment system that conducts a first heat treatment process and a second heat treatment process to an object to...
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6496749 |
Semiconductor producing apparatus and temperature control method therefor
A semiconductor producing apparatus is capable of quickly and accurately changing a controlled variable to a target value to thereby make the controlled variable quickly follow the target value....
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6490423 |
Method of operating a xerographic fusing apparatus with multiple heating elements
When powering up a xerographic fusing apparatus with two parallel lamps, power is applied to each lamp in a stair-step fashion, in which incremental increases in applied power for each lamp are...
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6486569 |
Power flow management in an electric power grid
Power flow management is achieved in an electrical power transmission network using serial impedance modulation distributed throughout the transmission lines of the network. Switching units are...
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6483085 |
Temperature control system and method for an integrated circuit
A temperature control system and method for integrated circuits, particularly those having a plurality of channels or power devices. The temperature control system for an integrated circuit...
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6479802 |
Process and apparatus for contact-less temperature regulations
The present invention concerns a process for contact-less temperature regulation, in which the temperature is measured in a contact-less mode with a temperature measurement device and detected as...
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6462314 |
Control system for a humidifier
A control system for a humidifier includes a variable resistor with an on/off switch function and a DC fan for dispersing heat in order to lower the cost of a humidifier. The control system...
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6437300 |
Method and apparatus for compensating for varying water conductivity in a direct electrode water heating vaporizer
A vaporizer that adjusts to the conductivity of the water used in the vaporizer, and that also adjusts to changes in the conductivity of the water while in operation, thereby decreasing warm-up...
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6423950 |
Reflow soldering apparatus
This reflow soldering apparatus comprises a heater tip 10 for soldering sites to be soldered of a workpiece W by reflow method, a power supply unit for supplying an electric power for heat...
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6420685 |
Control of electrical heater to reduce flicker
A control system for reducing flicker in an electrical resistance heater comprising: a source of AC (alternating current) current for supplying AC current to an electrical resistance heater; a...
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6396032 |
Oven temperature control circuit
An oven temperature control circuit utilizes one or more light emitting diodes to establish a clamping voltage that limits the voltage at the input of a circuit component, such as an...
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6384385 |
Process and device for the thermal conditioning of electronic components
The component, located inside a corresponding package, is associated with a first heat sensor, located in proximity to the component inside the package, together with a second heat sensor. A...
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6359265 |
Heated glass guard with electronic control for forklift trucks
An open forklift truck is provided having an elongated windshield that protects the operator from wind chills experienced when operating the truck in a cold storage environment. The windshield is a...
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6359266 |
Flicker free fuser control
A control system for delivering a constant fuser temperature despite variations in the line voltage is effected by a control circuit which employs closed loop feedback control to control the rms...
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6348677 |
Sensor circuit for detecting the presence of a pan on an electric cooker hob
On an electric cooker the sensor circuit ( 1 ) detects the presence of a pan ( 2 ) on each heater (F 1 -F 4 ) and comprises a microcontroller ( 4 ) and a generator ( 6,7 ) that supply a...
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6329642 |
Semiconductor device and semiconductor chip
A semiconductor device has an oscillator for generating an oscillating signal whose frequency is dependent on temperature, a frequency tester for determining whether or not the frequency of the...
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6326598 |
Non-intrusive fault location system for an overheat detection system
An overheat event location module for use with an existing overheat detection system in an aircraft. The module is non-intrusively connected to the overheat detection system, yet senses currents in...
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6310331 |
Circuit configuration for driving an ignition coil
A circuit configuration for driving an ignition coil includes a first semiconductor switch having a load path connected in series with a primary winding of the ignition coil, and having a control...
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6291803 |
Method and system of regulating heat in a vehicle seat
In order to ensure that a vehicle seat, having a supporting face and incorporating microcapsules of phase-change material having a phase transition temperature between 15 and 37° C., is...
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6274851 |
Electric arc furnace controller
An electric arc furnace includes a container for receiving metal, an electrode spaced apart from the container, and an electrical power source coupled to the electrode and the container for...
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6270638 |
Pyro-sensor and pyro-control circuit
A main heater consisting of first and second fever areas and auxiliary heater arranged on an insulator substrate to maintain a precise sensing temperature. Grounded first fever area is contiguous...
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6262400 |
Control method for a resistance heater in a vehicle heating system
An improved control method variably activates an electric resistance heating element in a vehicle heating system so as to maximize the heating performance without overloading the vehicle generator...
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6255629 |
Device for switching an electric heater
The invention provides a device (11) for switching an electric heater (12) with at least two heating areas (25, 27, 29), which can be variably supplied with electric power by at least one power...
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6252209 |
Adaptive temperature control circuit with PWM output
An adaptive temperature control circuit includes a first circuit for producing an error signal representing the difference between a preset temperature and an actual temperature and a second...
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6252207 |
Fuser temperature control sensor which is insensitive to surrounding air currents
A mechanism for controlling temperature of the at least one heated fuser element of a fuser, for a reproduction apparatus having a heater for the fuser element, operating at a desired temperature...
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