Thermally responsive

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494
This subclass is indented under subclass 490.  Subject matter including at least one means which is responsive to the temperature of the heated material, the heating element itself, or the surrounding atmosphere, by means of which the amount of current traversing the heating element or elements is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

110,for resistance type metal welding control systems responsive to temperature.
241,for heated tip hand tools with thermal control means.
251+,for electric flatiron type heaters with thermally controlled current supply.
328+,for liquid heaters with thermally controlled current supply.
413,for ovens with current supply responsive to condition of heating area.
449+,for planar surface heaters with thermally controlled current supply.
505,for regulators utilizing nonlinear or negative temperature coefficient resistance means.
510+,for heaters in general with thermally controlled switching means.

 
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Patent Number
Title
  Date
3936786 Temperature sensitive tipswitch Feb-3-1976
A temperature-sensitive tipswitch includes a pair of normally closed flexible conductive arms. A temperature responsive actuating arm is mounted adjacent the conductive arms and insulation discs separate all three. A bracket is connected into the stack formed by the arms and insulation discs and the...     
3937921 Temperature control system Feb-10-1976
A temperature control system comprises a heat sink heatable upon application of electric power thereto, an AC power source for heating the heat sink, temperature detector means for detecting the temperature of the heat sink, and control means for controlling the electric power applied to the heat sink...     
3942075 Semi-conductor thermal protection arrangement Mar-2-1976
A semi-conductor thermal protection arrangement is disclosed for use with class AB, B, or C power amplifiers or in any other circuit configuration wherein a reduction in drive signal at a stage prior to that of the protected semi-conductor results in a lessening of the protected semi-conductor dissipation....     
3943331 Temperature control circuit Mar-9-1976
A temperature control circuit is disclosed for controlling the firing angle of a thyristor such as a silicon controlled rectifier connected in series with a heater across an alternating power source. The control circuit comprises a field effect transistor having its source and drain electrodes connected...     
3959621 Thermally sensitive switch device May-25-1976
A main thyristor is serially connected to a load across an AC source. A thermally sensitive thyristor is connected at the anode to the anode of the main thyristor through a resistor and at the cathode to the gate electrode of the main thyristor and responds to an ambient temperature exceeding a predetermined...     
3971876 Temperature control apparatus Jul-27-1976
The disclosed invention describes an apparatus and method for bringing a system having high interactive portions to a predetermined temperature distribution. The invention includes a difference controller which provides, through two separate drivers, a fixed total amount of energy to the system being...     
3998146 Frying apparatus with compensated thermostat Dec-21-1976
A frying apparatus includes a frypot for containing cooking oil positioned in a support housing. Heating elements are pivotally attached to said housing and suspended within the frypot to heat the cooking oil for deep fat frying. A thermostat is mounted to the front of the housing to extend into the...     
4013872 Temperature control device Mar-22-1977
A temperature control device generates a signal proportional to deviations of the temperature from a predetermined set point. This first signal is averaged and a second signal produced in response to it. This second signal deviates from a reference level periodically for a duration proportional to the...     
4024336 Split bushing control May-17-1977
A circuit is described for controlling the temperature of a heating element used to heat molten glass in a bushing from which the molten glass is drawn into glass fibers and in which the bushing is divided into two sections. The circuit includes two temperature sensitive elements, such as thermocouples,...     
4034185 Electric blanket control circuit Jul-5-1977
An electric blanket control circuit is provided which includes an overheat protection circuit to detect an overheat condition as well as a fail-safe testing circuit to assure that the electrical components in said overheat protection circuit are properly functioning. A simulation circuit is provided...     
4036457 Aircraft de-icing Jul-19-1977
In a method for de-icing aircraft surfaces by means of a plurality of electrical resistance heaters which are sequentially supplied with heating current, the delivery of current to each heater being effectuated during a succession of cycles each constituted by a heating period during which heating current...     
4053733 Temperature control device Oct-11-1977
A temperature control device in which electric power to be supplied to a heating element is controlled correspondingly to pulse intervals applied to a switch circuit with the pulse intervals adapted to vary according to the temperature of the portion to be heated by the heating element, which temperature...     
4058703 Control system for frying apparatus Nov-15-1977
In apparatus for deep fat frying, control circuitry is provided for regulating the temperature of heating elements. During cooking the heating elements are immersed in cooking fluid and are maintained at a selected temperature by an operating thermostat. Two high limit thermostats are provided to turn...     
4081963 Control circuit for a servo-motor Apr-4-1978
The invention relates to a control circuit for a servomotor of the type having a piston displaceable to selectable positions in one direction by an expansible substance heatable by an electric heating element and in the other direction by a return spring. The circuit includes a pulsating power supply...     
4086466 Automatic heater controller Apr-25-1978
A system for controlling the temperature of the heater element of a heating apparatus by controlling the resistance of the heater element. In a preferred embodiment, the control system monitors a sensing excitation voltage at the heater element for comparison with a reference voltage, preferably at or...     
4114023 Heater control for rotary members Sep-12-1978
A heater roll in which a resistor-type heater mounted in the roll is controlled by use of a temperature sensing element also located in the roll. Electrical power, particularly AC power, is provided through slip rings and the set point for the temperature control is determined by a signal from a current...     
4121092 Electric power apparatus Oct-17-1978
Apparatus for controlling the supply of electric power to a power consuming appliance (e.g. an electric soldering iron) in dependence on a parameter (e.g. the temperature of the soldering iron) comprises electric circuit means including a thyristor connected in series with the appliance across an AC...     
4124793 Aquarium water heater Nov-7-1978
An aquarium water heater having a heater element energized by first and second silicon-controlled rectifiers connected in parallel in opposing conductive relation, one rectifier providing energy to the heater element on one-half cycle of alternating current while simultaneouly charging a capacitor which...     
4159415 Electric slot furnace Jun-26-1979
A slot furnace for heating steel to forging temperatures includes a housing lined with refractory material and a refractory hearth all defining a chamber in the housing for receiving and heating forging stock. A slot is located at the front of the housing adjacent the hearth in communication with the...     
4167663 Blood warming apparatus Sep-11-1979
An apparatus for warming blood and other parental fluids as they are infused through a disposable flow system includes a pair of heating elements which heat the blood as it passes through a warming bag provided in the flow system. The heating elements are recurringly switched on and off with a duty cycle...     
4170932 Electronic toaster control Oct-16-1979
An electronic control for controlling the degree of toasting of a bread slice in a toaster. The control includes a thermocouple located within the passage of the toaster for the bread slice and responsive to the temperature of the toaster casing, the slice of bread and the air temperature within the...     
4184067 Heat control apparatus Jan-15-1980
An automatic heat control apparatus for use with an electric heating element in a kiln or the like comprises a first power controller having a plurality of on and off intervals. The first controller supplies electric current to the kiln heating element during its on intervals, and further includes means...     
4188527 Automotive electric quick heat system Feb-12-1980
An automotive electric quick heat system utilizing a resistive heating element connected in series between the DC output terminal of a driven alternator and the voltage regulated terminal of the main storage battery. A shunting relay is controllable to bypass the resistive heating element when the conventional...     
4206344 Electric power controllers Jun-3-1980
A power controller for controlling the intermittent supply of current to a load, such as a cooker hotplate, has a pivotally mounted snap switch controlled by a heated bimetal member which is heated in dependence upon the connected power. A compensating bimetal strip, for taking ambient temperature into...     
4214117 Furnace heated by radiation Jul-22-1980
A furnace which is suitable for analytical measurements is heated by radiation. For this purpose, a radiation source whose radiation is absorbed by the furnace wall is arranged near to the furnace. The furnace is preferably formed as a hollow cylinder which surrounds the radiation source. An incandescent...     
4220840 Pulsing probe for microwave oven Sep-2-1980
A microwave oven cooking control system is provided with a comestible probe for temperature sampling. The comestible probe is only intermittently energized so that self-heating is avoided. Energization of the probe is under the control of a timing mechanism, which concurrently produces a voltage signal...     
4225776 Electronic digital time display apparatus Sep-30-1980
A digital clock device includes data storage units and produces switching signals in response to the data stored in accordance with predetermined functions, such as time of day and lapse of time. Switching signals responsive to quantities not related to time can also be produced. Data being stored is...     
4234785 Liquid level responsive control device Nov-18-1980
There is disclosed liquid level responsive control means for use with heating means for liquid in tanks comprising a control unit, main power supply connections therefore, a source of radiant energy to be immersed in the liquid being heated, sensing instrumentalities closely adjacent said source, said...     
4245149 Heating system for chairs Jan-13-1981
The invention relates to a heating element for a heated chair which can be used as a covering material for the heated chair or which can be laid under the covering material or which can be draped over an ordinary chair to convert it to a heated chair. In accordance with the invention, the heating element...     
4263501 Variable proportioning control apparatus Apr-21-1981
The apparatus may be used to control heater elements for an over chamber. The heater elements are operated in accordance with the output of a comparator having on one input a voltage representative of the temperature in a chamber. The voltage on the other input is established in accordance with the desired...     
4273991 Pressure cooker Jun-16-1981
A pressure cooker particularly adapted for use as a pressure fryer. The cooker's tank is electrically heated by a novel electrical resistance heater and heat reflector structure. The cooker also includes a novel cover and cover hold-down mechanism.
4288271 Temperature control apparatus Sep-8-1981
A circuit arrangement for controlling the temperature of a thermoplastic bonding or cutting blade in which changes in the length of the blade caused by temperature variations are monitored and a signal is developed and fed back for controlling the amount of current flowing through the blade to thereby...     
4302663 Control system for a heater Nov-24-1981
A space heater having two heating elements and a motor/fan combination for circulating air over the heating elements to supply heated air to an environment includes a system for controlling the operation of the heating elements and the motor in response to heating requirements of the environment. The...     
4308008 Method for differential thermal analysis Dec-29-1981
A method for differential thermal analysis and a furnace which is suitable for analytical measurements is heated by radiation. For this purpose, a radiation source whose radiation is absorbed by the furnace wall is arranged near to the furnace. The furnace is preferably formed as a hollow cylinder which...     
4315138 Electric rice cooker Feb-9-1982
An electric rice cooker comprising a heater for heating a kettle and contents thereof, an electric timer which controls the energization and deenergization of the heater in response to the temperature of the kettle and a heat isolator for securing the timer and for preventing heat from being transferred...     
4315139 Electric rice cooker Feb-9-1982
An electric rice cooker with a kettle for containing rice, a heater for heating the kettle, a thermoswitch for deenergizing the heater in response to the temperature of the kettle, a timer for reenergizing the heater for controlling a twice cooking and which is operated for a predetermined time period,...     
4316080 Temperature control devices Feb-16-1982
A temperature-controlling circuit including a heating element, a portion of which is shunted by a proportional PTC thermistor having a low rate of charge of resistance with increasing temperature that controls current to the shunted and unshunted portion of the heating element to provide a proportional...     
4323762 Energy-temperature occupant monitor apparatus Apr-6-1982
Apparatus for disconnecting electrical powered devices from a source of electrical energy when the use of the devices is no longer needed. The apparatus includes an electrical switch movable in response to an actuation member. The switch is connected between a source of electrical energy and an electrical...     
4323763 Parametric power controller Apr-6-1982
Disclosed is a vacuum furnace temperature controller for the stable regulation of temperature over a wide range of temperatures. The control loop includes a multiplier responsive to the desired temperature which modifies the overall loop gain and the maximum power which may be applied to the furnace...     
4333004 Detecting ice forming weather conditions Jun-1-1982
Sensor and reference wires are directly exposed to the airflow past a vehicle. The wires are electrically conductive, and each has a resistance varying with its temperature. A continuous fixed voltage is passed through the reference wire. A short pulse of greater constant voltage is passed through the...     
4339656 Glow discharge heating apparatus Jul-13-1982
Typically, a bottom of a cup-shaped electrode opposes to that of a similar electrode through a predetermined gap and in a mixture of helium and hydrogen. A step-up transformer connected across an AC source through a resistor applies a voltage in excess of a discharge breakdown voltage for the gap across...     
4360726 Electric kettle Nov-23-1982
An electric kettle having a metal sheathed element 20 permanently mounted on a metal head 22 so as to produce a hot spot 29 and the switching means comprising a dry overload responsive actuating mechanism 14 responsive to overheating of the hot spot to open switch contacts 71, 72 mounted on an electrical...     
4362923 Rice cooker Dec-7-1982
Disclosed is a rice cooker comprising a pot for containing rice and water, a heater provided at the bottom of the pot for heating the pot, a sensor for sensing temperature of the pot to produce a detecting signal when the temperature of the pot reaches a predetermined value, and a drive circuit which...     
4362924 Temperature achievement controller Dec-7-1982
A temperature achievement controller for controlling the temperature of a device which is heated by a heating unit in accordance with a predetermined temperature versus time schedule. The controller includes apparatus for producing an analog signal which corresponds to the achieved temperature of the...     
4363958 Preheating apparatus for diesel engines Dec-14-1982
A parallel circuit of an ordinary resistor exhibiting an ordinary resistance characteristic and a starting resistor abruptly increasing its resistance at a certain temperature is inserted between glow plugs in a Diesel engine and a battery. The resistance of the starting resistor is smaller than that...     
4370546 Kiln temperature controller Jan-25-1983
A kiln temperature controller is provided comprising a circuit for providing a first signal representative of a selectable kiln temperature and a temperature detection circuit for providing a second signal representative of the detected kiln temperature. The temperature detection circuit comprises first...     
4370547 Variable thermal impedance Jan-25-1983
The invention is a method for controlling the temperature of a primary heat-generating source in an environment whose temperature may vary widely. A heat-pipe is used to carry the heat from the source to a sink at ambient temperature. A separate control source applies heat to the heat pipe. The condensed...     
4375028 Electric kettle Feb-22-1983
An electric kettle comprises a bowl closable by a lid. An electric element is connected to the lid and is thereby suspended within the bowl. A spout is provided for pouring and through which the bowl can be filled with water. Means are also provided for the connection of the element to an electricity...     
4394564 Solid plate heating unit Jul-19-1983
A control system for a top plate surface heating unit having a softening temperature. The control system incorporates a temperature setting means for determining the operating temperature of the surface heating unit and means for automatically limiting the temperature of the surface heating unit to a...     
4421974 Electric rice cooker Dec-20-1983
An electric rice cooker is disclosed which has a cooking kettle containing rice and water, a thermal insulating frame and an electric heater provided adjacent to the outside surface of the kettle. The electric rice cooker performs auxiliary cooking, such as "twice cooking", for effectively converting...     
4427876 Gravity switch Jan-24-1984
A gravity switch for automatic control of an operative cycle in an appliance, such as a toasting cycle in a toaster oven or the like, includes an imbalanced weight member interposed between a displaceable member that moves in accordance to operation of the cycle and mechanical component parts operative...     
4431906 Electric rice cooker Feb-14-1984
An electric rice cooker is disclosed which includes a cooking kettle for containing rice and water, a removable lid member covering the top of the kettle, a heater provided adjacent to the outer bottom surface of the kettle to heat the kettle, and a thermistor for measuring the actual kettle temperature....     
4437159 Cooking computer Mar-13-1984
A cooking computer for use with a deep fat fryer having a temperature sensing probe as disclosed herein. The temperature sensing probe feeds a signal to a microprocessor. The microprocessor provides internal cook cycle timers which are alterable by signals from the temperature probe to correspond to...     
4438324 Electric rice cooker Mar-20-1984
An electric rice cooker is disclosed which has a cooking pot or kettle for containing rice and water, a removable lid member covering the top of the kettle, an electrical heater provided adjacent to the outside surface of the kettle for heating the kettle and the contents thereof, a thermal insulating...     
4439666 Electrical heating system Mar-27-1984
An electrical heating system for use in heating surfaces. A heating element is constructed of mesh screen comprised of nonferrous, small gauge metal wires which are spaced in a cloth mesh arrangement such that the total surface area of the wires is substantially equal to or greater than the adjacent...     
4441016 Electric rice cooker Apr-3-1984
An electric rice cooker is disclosed which performs auxiliary cooking such as "twice cooking" by changing the operating time of auxiliary cooking in accordance with the actual cooking amount, immediately after the main cooking is completed. The actual temperature of a kettle which contains rice and water...     
4441069 Self-extinguishing load driving system Apr-3-1984
A load and the main conductions paths of first and second TRIACs are connected in series between first and second power terminals across which an alternating voltage is applied. The first TRIAC is for controlling the power dissipated in the load and the second TRIAC is for unconditionally removing power...     
4442343 Adjustable cup and fluid heater Apr-10-1984
A heater for cups and fluids therein having an adjustable heat selector, heating circuitry and temperature stabilization circuitry, comprising a base support, an electrical circuit enclosing housing, an opening in an upper substantially horizontal surface of the housing for a heating element plate and...     
4447712 Heating system May-8-1984
A system for space heating a dwelling, office and the like having a plurality of heating means and having a control mechanism for sequentially actuating said heating means to actuate only one said heating means at a time.
4463249 Electric rice cooker Jul-31-1984
An electric rice cooker is disclosed which has a cooking pot or kettle for containing rice and water, an electrical cooking heater provided adjacent to the outside surface of the kettle for heating the kettle and its contents, a thermal insulating frame structure including a removable lid member, and...     
4467182 Control circuit Aug-21-1984
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 temperature control circuit. The temperature control circuit includes a comparator-amplifier having one input...     
4489235 Hydrocolloid conditioner apparatus Dec-18-1984
A microprocessor controlled hydrocolloid conditioner comprising a frame, a bath tank separably supported by said frame for containing water heated to a pre-determined temperature useful in the conditioning of hydrocolloid material, heating means comprising a power supply and a heating element disposed...     
4504733 Dry bath temperature control Mar-12-1985
An electrically-heated dry bath wherein a metal block having receptacles for receiving test tubes or the like has resistor heaters fixed thereto and a thermistor temperature sensor therein. A control circuit is provided which connects and disconnects electrical current to and from said heaters in response...     
4506146 Wire temperature controller Mar-19-1985
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 resistance of the wire as it is heated, through bridge circuit and microprocessor techniques.
4519716 Device for testing combustability May-28-1985
A device which simulates the burning of an elongated smoking product such as a cigarette, for testing the combustability of an article. The device includes a rod-shaped resistive heating element, the length and cross section of which are the same as those of the product whose burning characteristics...     
4547648 Apparatus for mounting crystal Oct-15-1985
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. The crystal rests within a thermally conductive metallic housing and arranged to be temperature controlled....     
4565920 Fail safe thermal control device Jan-21-1986
This invention relates generally to thermal control apparatus wherein a change in temperature is transmitted from a sensing bulb through a capillary to a control device. More particularly this invention is related to a novel, fail-safe control device for use in conjunction with a temperature sensing...     
4571488 Heat-fusion pipe fitting system Feb-18-1986
A thermoplastic heat-fusion pipe fitting system comprising a thermoplastic heat-fusion pipe fitting having a body portion to accommodate pipe and a shaped portion bearing a code indicative of the amount of heat required to effect fusion of the fitting, means for heating the fitting, means for sensing...     
4575620 Flexible heating wire Mar-11-1986
A flexible heating wire includes a first conductive body, a second conductive body, a thermally fusible electrically insulative body which are arranged such that the first and second conductive bodies will be brought into electric contact with each other when the thermally fusible electrically insulative...     
4603245 Temperature control apparatus Jul-29-1986
A temperature control apparatus for a copying machine has a halogen heater for heating a fixing roller, a thermistor for detecting the surface temperature of the fixing roller, and a microcomputer for performing ON/OFF control of the halogen heater in accordance with an output from the thermistor. After...     
4633065 Convection cooking apparatus Dec-30-1986
A convection cooking apparatus including an oven temperature sensing element and a food temperature sensing probe. In response to an output signal from the oven temperature sensing element, the oven temperature is maintained at a desired value. When the food temperature reaches a desired value, a control...     
4636620 Temperature compensation injector control system Jan-13-1987
A temperature compensation injector control system as used in an electronic fuel injection system for motor vehicles utilizes the value of the voltage levels across the coil (18) to determine the coil's (18) temperature. A multiplexer (20) responds to the value of the source of power (14) and the voltage...     
4650347 Temperature detector Mar-17-1987
An electrostatic copying apparatus having a semiautomatic document supplying and discharging device and a sorter in addition to its main body. The main body of the apparatus includes a rotatable photosensitive member, a device for forming a latent electrostatic image on the photosensitive member, a developer,...     
4652155 Printer having a thermal head Mar-24-1987
In a serial thermal transfer printer or serial thermal printer comprising; a thermal head having a plurality of heat elements arrayed in a line; and means for selectively energizing and driving the plurality of heat elements in synchronous relation with the relative movement between the thermal head...     
4654507 Solder reflow heater bar assembly Mar-31-1987
Heater bar assembly for a reflow solder machine comprises first and second fingers (50, 52) carrying U-shaped heater bar (54) which is pivotable on main member 22. A spring urges the heater bar assembly to the centered position. First and second thermocouples (82, 84) are secured to the heater bar (54)...     
4663710 Intelligent cooking appliance May-5-1987
A cooking appliance includes a heating source to provide heat to a cooking medium for cooking food, temperature sensing circuitry for detecting the cooking medium temperature and control circuitry connected to the temperature sensing circuitry for cooking the food according to data stored in the control...     
4672540 Intelligent cooking appliance Jun-9-1987
A cooking appliance includes a heating source to provide heat to a cooking medium for cooking food, temperature sensing circuitry for detecting the cooking medium temperature and control circuitry connected to the temperature sensing circuitry for cooking the food according to data stored in the control...     
4677282 Failure protection in temperature control Jun-30-1987
A triac and a mechanical relay, in series with the electrical heater of an incubator, together switch heater current on and off at the same set point temperature if the triac fails short. Similarly, a second mechanical relay in parallel with the triac switches heater current around the triac, should...     
4677843 Roller oven for testing fluids Jul-7-1987
An oven for testing fluid samples to determine the effects of temperature and various chemical additives on the rheological, filtration and chemical properties of the sample under simulated circulating conditions comprises an environmental chamber having therein a plurality of motorized roller members...     
4686351 Thermal developing apparatus Aug-11-1987
A thermal developing apparatus develops a thermally developable photosensitive material having an electrically conductive, heat-generating layer. The temperature of the photosensitive material is raised to a predetermined temperature suitable for development by supplying the heat-generating layer with...     
4705930 Heating control apparatus Nov-10-1987
A heating control apparatus for exciting the heating element of a kiln or the like. The heating control apparatus includes an interval timer that produces a pulse of electricity having a predetermined duration of time, a fixed timer adapted to open and close an electrical path, and a power relay connected...     
4711989 Diffusion furnace multizone temperature control Dec-8-1987
There is a substantial heat loss and drop in temperature in a hot-wall diffusion tube when a batch of wafers at room temperature is loaded into the tube. The temperature of the atmosphere in a zone in the tube is quickly recovered by sensing both the temperature of the tube atmosphere and the temperature...     
4736090 Electric heating circuit Apr-5-1988
A temperature sensitive control circuit for an electrically heated rotatable drum (11) including an internally disposed electric heater (27) and an electric temperature sensor (28) and, outside of the drum, an electric supply (30) for heating the heater and a D.C. supply (31) for producing a constant...     
4740888 Control system for cooking apparatus Apr-26-1988
A control system for cooking apparatus including a heat source, a heat control system and a back-up thermostat system having a back-up temperature probe. The control system includes a digitally controlled microcomputer which provides control transfer from a cooking computer temperature probe upon probe...     
4775777 Open-loop self-cleaning oven temperature control Oct-4-1988
A nominal closed-loop temperature control system and method for a self-cleaning oven is adapted, upon recalibration of the bake temperature of the oven, to operate in an open-loop manner during the CLEAN mode of operation of the oven, Specifically, prior to recalibration of the oven, an average value...     
4777350 Heater with duty cycle controller Oct-11-1988
A heater including a sensing device for sensing an ambient temperature, a temperature input device for providing a user selectable input temperature both connected to a first circuit to control the heater. The first control circuit includes positive feedback and negative feedback to electrically define...     
4780598 Composite circuit protection devices Oct-25-1988
Circuit protection devices which comprise a PTC conductive polymer element and a second electrical component which is thermally coupled to the PTC element and which, when a fault causes the current in the circuit to become excessive, generates heat which is transferred to the PTC element, thus reducing...     
4782445 Control apparatus for cooking apparatus Nov-1-1988
Apparatus for averaging the temperatures of a plurality of temperature probes in an oven automatically eliminates the temperature readings of probes outside a predetermined temperature differential from the probe temperature average. The apparatus utilizes a microcomputer to provide high energy load...     
4814583 Temperature controller for a waterbed Mar-21-1989
A temperature controller for controlling an electrical heater of a bed maintains the bed at a predetermined set temperature and additionally, over a long period of time, acts to vary the set temperature to compensate for variations in the temperature of the ambient environment in which the bed is situated....     
4820907 Controlled furnace heat treatment Apr-11-1989
The present invention is directed to a heat treatment apparatus for performing heat treatment of a substrate. According to the present invention, a thermocouple is introduced into a heating furnace and discharged from the heating furnace by carrier means in such a state that one side ends of the wires...     
4851646 Electric sauna stove Jul-25-1989
A combined electric sauna stove and sauna room heater having a plurality of electrical resistors and electrical circuitry for controlling the current supply to the resistors. In order to eliminate the need of separate room heating elements in the sauna room, the electric sauna stove is provided with...     
4855573 Electrically heated binder apparatus Aug-8-1989
A heating apparatus for use in binding, which apparatus includes a base and a cover member hingedly connected to each other. The cover member includes a binding-receiving compartment positioned above a portion of the base. A pair of spaced electrical contacts are positioned in the base below the binder-receiving...     
4868368 Heated roller temperature control system Sep-19-1989
An automatic temperature control system for a heated roller constituting a fixing device. This control system has functions to sense the surface temperature of the heated roller, to compare with the sensed temperature and a target temperature suited for fixing toner image on a paper, and to determine...     
4874926 Electric heating load management control Oct-17-1989
A low cost system for permitting the remote load management control of electrical residential room heating units that is compatible with existing heating systems of the type wherein each room heating element is controlled by a manually settable line voltage thermostat responsive to ambient room temperature....     
4879454 Fiber optic fabrication furnace Nov-7-1989
An electric furnace for fusing optical fibers has a body made of insulating material. A fiber channel is provided wherein the fibers to be fused are positioned. To facilitate the insertion of the fibers a slot is provided which extends from the fiber channel to the surface of the body. Coil channels...     
4891497 Soldering iron temperature regulator Jan-2-1990
A soldering iron temperature regulator capable of calibrating the measuring error of the temperature sensor for detecting the tip temperature of a soldering iron at ordinary temperature. It comprises a temperature control part for adjusting the heating temperature of the heater on the basis of the set...     
4894513 Heatable windshield temperature control Jan-16-1990
A temperature control device for a heatable windshield which includes a temperature sensitive resistance member that extends into critical areas of the windshield to monitor the windshield temperature and prevent overheating. The voltage drop across the member is compared to a set voltage drop value...     
4897528 Kiln with contaminant after-burner Jan-30-1990
A contaminant elimination system is disclosed which eliminates (or dramatically reduces) the contaminating components in, for example, exhaust gas from a kiln by enclosing the kiln gas venting channel and processing the exhaust gas by the contaminant eliminator system. This system includes a heating...     
4916291 Electric drying apparatus automatic controller Apr-10-1990
This invention relates to an electric drying apparatus automatic controller which automatically controls an electric drying apparatus in order to dry the articles put therein within a shortest period of time and with minimized power consumption. The control includes a timer, a humidity controller, and...     
4931075 High current multiterminal bushing controller Jun-5-1990
An improved bushing controller is shown which utilizes an auxiliary transformer in each of the variable impedance circuits in the controller and the bushing tha the controller is connected to increase the current capability of the controller by a significant percentage. Improved performance of fiber...     
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