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4626662 |
Programmable multi-function feedback cooking apparatus
A programmable multi-function feedback cooking apparatus senses the temperature of food substance or a liquid cooking inside a vessel. The analog voltage produced by a temperature transducer is...
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4617453 |
Thyristor controlled power source for gradually decreasing loads
A heating power source device includes a pair of loads connected to a secondary side of a power source transformer by way of four thyristor units. Each of the thyristor units includes pair of...
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4614860 |
Process and device for the anticipatory self-adapting regulation of a procedure
The device of the invention serves for the temperature regulation of an element heated by means of a heat source and whose temperature is measured by means of a detector. Said device includes a...
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4613746 |
Method and apparatus for automatically controlling the temperature of a heater element
A method and apparatus for controlling the temperature of a heater element in accordance with the dwell time of an item to be heated by the heater element. The apparatus of the invention utilizes a...
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4607153 |
Adaptive glow plug controller
An adaptive glow plug controller provides a tracking model temperature means for controlling the application of power to one or more glow plugs in response to the present temperature of the glow...
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4604516 |
Cascaded arrangement for electrically heating fluids to high temperature
A cascaded fluid heating for electrically heating to fluid, such as a gaseous fluid in a flameless torch, to a high temperature includes a pump to pump a relative constant stream of fluid through a...
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4604517 |
Pulse frequency modulation control for a heater
A microcomputer is programmed to respond to the zero crossings of an AC power source to trigger a uniform pulse pattern of an integral number of AC cycles as the AC excitation to a heater element...
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4600827 |
Dual-powered pyrolysis probe driving circuit
A dual power-supply system is used to produce a sharp rise-time characteristic and a high steady-state temperature in a platinum ribbon pyrolysis probe. First, a small "boost" power supply...
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4598195 |
Safety temperature circuit including zero crossing detector
A temperature control apparatus has a first comparator circuit for comparing the voltage corresponding to thermal data provided by a thermal sensor with a first reference voltage generated in...
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4594501 |
Pulse width modulation of printhead voltage
An electronic thermal printer has a thermal printhead to which is applied a train of pulses which is pulse width modulated. A power switch connects and disconnects the printhead from a DC power...
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4593180 |
Electric control apparatus with undervoltage protection
An electric apparatus involves a temperature sensor and a controlled circuit connected to an A.C. source to be sequentially controlled in accordance with the output from the temperature sensor. The...
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4590363 |
Circuit for controlling temperature of electric soldering tool
In a circuit arrangement for controlling the operating temperature of the heating coil of an electric soldering iron, the resistance variation of the heating coil itself is to be evaluated at...
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4590362 |
Drive circuit for temperature control heater in ink jet printer
A circuit for controllably driving a heater in order to speed up temperature elevation at a buildup stage of a liquid which is to be maintained at a predetermined temperature heated by the heater,...
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4588875 |
Multiple load control apparatus with load equalization
A step controller for a water heater includes a plurality of individual electrical elements to maintain a predetermined minimum temperature in accordance with a sensed temperature signal and a...
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4585926 |
Temperature control and indicating arrangement
A temperature control and indicating arrangement comprises an electric heating element; a thermostat connected in series with the heating element and responsive to the heat generated thereby; and...
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4582057 |
Fast pulse thermal cautery probe
A miniaturized, endoscopically deliverable thermal cautery probe for cauterizing internal vessels. The probe is applied to tissues cold, and a large number of electric heating pulses of equal...
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4580038 |
Indicating and control apparatus for a portable heating appliance
An iron includes a heater, a thermostat, a temperature select knob, a READY indicator, a WAIT indicator, an audible transducer, a relay, a motion detector, and a microrprocessor-based electronic...
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4570054 |
Open loop control for spectrophotometer atomizer furnace
Heating apparatus particularly for flameless atomization in spectrophotometers includes a variable electrical power source and a resistive heating element. A desired final temperature and the rate...
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4567353 |
High-accuracy temperature control
In a temperature control system having a heating element and a temperature sensor for sensing the temperature generated by the heating element and providing signals effective to control electric...
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4565918 |
Heating circuit for a thermal recording-pen
In an automatic recording instrument having a thermal recording-pen to record on a heat sensitive recording-paper, an operational amplifier output supplies the heating current to the thermal pen...
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4564749 |
Heater drive circuit for controlling ink temperature in ink jet printer
A drive circuit for controllably driving a heater which is used for maintaining ink in an ink jet printer at a predetermined temperature. A plurality of power sources are installed in the circuit...
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4554439 |
Two wire heater regulator control circuit having continuous temperature sensing excitation independent of the application of heater voltage
A heater control circuit functions in conjunction with a suitable heating coil to provide precision, automatic temperature regulation. The combination of heating and temperature sensing functions...
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4549074 |
Temperature controller for providing a rapid initial heating cycle using a variable reference voltage
A temperature controller applied to flat heating equipment, such as an electric blanket, is disclosed wherein power supply control to a heater wire in the blanket is performed, using a...
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4547648 |
Apparatus for mounting crystal
A thickness monitor useful in deposition or etching reactor systems comprising a crystal-controlled oscillator in which the crystal is deposited or etched to change the frequency of the oscillator....
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4546238 |
Circuit arrangement for temperature control of an electric heating element
The invention relates to a circuit arrangement for controlling the temperature of an electric heating element (10), where the resistance of the element is utilized as a measure of the temperature....
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4546239 |
Non-continuous sensing apparatus for a temperature control
A non-continuous sensing device for a temperature control including A.C. power switching element, a zero-crossing detector, a temperature sensor and a trigger pulse generator for generating a...
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4540877 |
Constant current closed loop controller for rotating system
A temperature controller for monitoring the temperature of a rotating heating system and regulating the temperature relative to a desired temperature. A transmitter within the rotating system...
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4532414 |
Controlled temperature blood warming apparatus
An in-line fluid warmer for heating parenteral fluids, particularly blood, supplied from a fluid container through a flexible supply conduit. The fluid warmer includes a box-like enclosure...
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4523084 |
Controller for resistive heating element
The controller of the present invention regulates the flow of current through a resistive heating element by computing the predicted resistance R hot of the heating element at the desired...
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4523079 |
Electric iron having electronic control circuit with a power resistor mounted on the soleplate
An electric steam iron includes a plastic housing shell forming a hollow handle structure and a soleplate with steam generating means and ports for distribution of steam. A pump actuated by a...
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4520259 |
Electrical energy saver
An electrical system for providing an energy load regulator for use with electric clothes dryers and electric hot water tanks. The load regulator cycles the heating element within the dryer or hot...
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4511791 |
Electronic balance meter
The bushing temperature measurement device is a microprocessor based sensor which determines the temperature across a multi-segment electrical resistance heated glass fiber producing bushing. The...
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4510376 |
Variable timing system for toasters and similar appliances
This drop-down toaster has a bread support and a door at the bottom of each toasting compartment. The door has a series of vent holes for air convection which produces improved uniformity in the...
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4507546 |
Control circuit responsive to a component's varying resistance
An electronic control circuit for controlling the power applied to an electronic component such as a heater element or an electric winding for a motor. This is effected by measuring variations of...
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4506137 |
Temperature responsive control circuit for electric window de-fogger/deicer heater
A control system for regulating the operation of an electric resistance heating grid for de-icing or de-fogging a window of an automobile in accordance with the temperature of the window includes a...
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4506146 |
Wire temperature controller
A method and apparatus are described for controlling the temperature of a heated wire, such as on a wire sealer for plastic film. Temperature control is based upon measurements of changes in the...
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4506144 |
Control for radiant heating
A control for the heating section of a blow-molding machine is provided. The control permits independent selection of periods for high and low power energization of each radiant heating element of...
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4506143 |
Automatic temperature control device
An automatic temperature control device includes a series-connected temperature setter, a comparison unit whose second input is connected to an actual temperature transducer of the controlled...
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4504732 |
Simulative temperature controller for a motor vehicle
A heating device for use in motor vehicles to rapidly heat combustion chambers, exhaust gas sensors, catalyzers and other associated apparatus. A resistive heating element is connected in series...
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4501952 |
Electric fluid heater temperature control system providing precise control under varying conditions
A fluid heater, particularly for heating paints, lacquers, varnishes and other spray coating material, includes an elongated hollow tube adapted to be inserted into a fluid flow line for fluid flow...
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4496829 |
Bang-bang dual-mode integral controller with proportional control output useful for temperature control
Control system which measures overshoot or undershoot time of a controlled variable with respect to a set value and adjusts a proportional count if the overshoot or undershoot time period exceeds...
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4495405 |
Automatic control system including error processing loop
Automatic control system for controlling the switching point of a device which operates in at least two modes of operation, provides for automatic modification of the error signal which controls...
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4493984 |
Temperature control device for fixing heat source of copying machine
A temperature control device for a fixing heat source of a copying machine includes circuits for supplying power to the fixing heat source in synchronism with the zero-cross point of an a.c. signal...
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4493983 |
Current detector in combination with an electrical apparatus
A device for incorporation into the power supply circuit of an electrical apparatus comprising (a) a switch which is movable from one condition to another on application of power to the switch and...
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4486648 |
Energy regulator for a household heating appliance for producing variable speed initial heating
An energy regulator for a household heating appliance such as an electric cooker comprises an electronic controller for the cyclical control of the supply of electrical energy to a heating element...
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4485296 |
Automatic temperature control device for an electric appliance such as an electric blanket
The automatic temperature control device for an electric appliance such as an electric blanket comprises a heater element, a sensor made of a thermosensitive material having an impedance, which...
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4467386 |
Fail-safe sensor circuit
A sensor circuit includes a measurement signal generator which includes a sensing element having an impedance which varies in response to changes in a sensed parameter. The sensor circuit also...
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4467182 |
Control circuit
A system for controlling the temperature at a location which is heated by a heater. The heater is intermittently energized by a source of electrical power in response to control signals from a...
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4459469 |
Ink temperature control apparatus for ink jet printing apparatus
A liquid temperature control apparatus for an ink jet printer has a first ink temperature sensor located adjacent but at a spacing from an ink ejection head and a second ink temperature sensor...
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4449032 |
Variable gain oven temperature control circuit
The frequency of an electronic oscillator is controlled by a crystal located in the oven. The heaters in the oven include resistance elements for quick warm-up, and steady state. The circuit allows...
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