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7485832 |
Method and circuit for preventing over-heat of heat-generating device
A method and a circuit for preventing over-heat of heat-generating device which are provided with a trigger circuit and a microprocessor on a heater circuit. And the trigger circuit is connected...
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7343671 |
Process for manufacturing a composite polymeric circuit protection device
A process for manufacturing a composite polymeric circuit protection device in which a polymeric assembly is provided and is then subdivided into individual devices. The assembly is made by...
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7247816 |
Heating apparatus, fixing apparatus, and image forming apparatus
A heating apparatus includes a heating roller that is heated by heating units, a main power supply that supplies power from an external power supply to the main heating unit, and an auxiliary power...
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7208704 |
Heating device with thermostat switch
A system for wiring a heating element in an electrical appliance to a conventional thermostat switch in a new manner and a new thermostat for supporting the new wiring system. The new wiring system...
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7164102 |
Self heating thermal protector
A self heating thermal protector located in close proximity to a remotely located incandescent light fixture for controlling the flow of current to the lighting fixture by measuring the rate of...
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7071449 |
Molding system with integrated film heaters and sensors
Film heater apparatus and method for heating a melt channel in a molding device includes structure and/or steps whereby a first dielectric layer is disposed on a surface of a substrate. An active...
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7002112 |
Heating apparatus for increasing temperature in short period of time with minimum overshoot
A heating apparatus includes a heating roller that is heated by heating units, a main power supply that supplies power from an external power supply to the main heating unitl, and an auxiliary...
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6700102 |
Dryer control circuit
A control circuit for a clothes dryer operating with a 120 volt power supply compensates for changes in the ambient temperature to compensate for premature advancement of the dryer timer motor...
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6472646 |
Thermally sensitive controls
A thermally sensitive, overheat protection control for a thick film electric heater comprises a bimetallic actuator ( 68 ) arranged for making good thermal contact with the heater, and a moveable...
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6229121 |
Integrated thermal buckling micro switch with electric heater and sensor
An integrated thermal buckling micro switch is made by using electromechanical technology to integrate sensors and actuators on a single chip. An epitaxial chip is used and etched to form a mesa...
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6114672 |
PTC-element, protective device and electric circuit board
A PTC-element to be used as a protective device against overcurrent or overvoltage, of which the volume resistivity does not substantially differ before and after a high temperature processing,...
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6072152 |
Heater control device
A control device for a heater in a vehicle. The control device has a thermostatic switch to turn the heater on when the air temperature drops to a first value that is around the temperature at...
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5837971 |
Electric blanket having reduced electromagnetic field
An electric blanket using an AC to DC converter circuit either alone or in combination with a shield mesh that surrounds the heating wire to substantially reduce the electromagnetic field produced...
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5804798 |
Thermal protector with bimetal plate
A thermal protector having a fixed plate with a fixed contact point at one end, a movable plate having a movable contact point at a position corresponding to the fixed contact point. A bimetal...
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5655709 |
Electrical control system for relay operation responsive to thermostat input having improved efficiency
A temperature control system is shown in which a thermostat circuit is combined with a power supply to produce a higher anticipator current for a W1 signal while reducing power consumption and heat...
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5607610 |
Compact protector
A compact protector device having a housing 10 with a fixed electrode 18 and terminal member 12 and a movable electrode 26 and terminal member 14 contained therein. The movable electrode 26...
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5510598 |
Electro-thermally actuated switch
A thermally-actuated switch includes a pair of switch contacts openable or closeable in response to a change in the length of a shape memory metal (SMM) rod. The SMM rod is caused to change its...
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5428206 |
Positive temperature coefficient thermistor heat generator
A heat generator is formed to quickly raise the temperature of an object to be heated to a target level and then maintain the temperature of the object at the target level. The heat generator...
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5148005 |
Composite circuit protection devices
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...
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5039843 |
Safety cutout device
A safety cutout device for electric loads, particularly for use in pressing irons and portable heating apparatus, has a temperature switch, such as a bimetallic switch, which is adapted to be...
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4998007 |
Electrically heated reservoir having a preassembled plural tube continuous flow heating unit
A heating unit (1) for a medium reservoir (2) provided e.g. as a fryer has a sheet metal, U-shaped support (3) with a plurality of continuous flow heater tubes (4) fixed rigidly between its legs...
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4978838 |
Device for electronic control of the supply of a heating resistance
Electronic control device of the electrical supply of a heating resistance (1) adapted to heat a cooking or grilling enclosure (2) such as, for example, the heating enclosure of a toaster. A...
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4912300 |
Control device for heating appliance having two operating regimes
The control device (25) comprises a thermostat (15) interconnected between a supply source (S) and a heating resistor (4) which comprises two heating elements (41, 42), one of which (42) is...
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4884780 |
Valve actuating arrangement
An active member can deform in accordance with its temperature. The active member is connected to a mechanically-operated valve member so that the operated member is driven in accordance with...
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4842192 |
Microprocessor controlled thermostat for dryer
A thermostat controlled circuit for a bias heater located adjacent the thermostat connected to a source of alternating electrical power. The control circuit has a manually operated switch for...
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4780598 |
Composite circuit protection devices
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...
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4758708 |
Insecticide dispenser with temperature sensor
An insecticide dispenser capable of initiating the volatilization of a charge of insecticide to fumigate a room and then automatically shutting itself off during, or at the completion of the...
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4758709 |
Electric coffee maker with warming plate having adjustable heat output to prevent overheating
An electric coffee maker has an electric flow-through brewing water heater with a heating resistor controlled by a temperature dependent regulating switch responsive to the temperature of the...
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4754119 |
Temperature regulating device, particularly for liquids or gases
A temperature regulating device with a hydraulic regulator for medium heating has a sensor tube in a closely surrounding protective jacket, which is connected directly in good heat conducting...
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4725713 |
Electrically heated hose employing a hose simulator for temperature control
A system for electrically heating a hose of the type used to transport one or more fluid components from a remote location to a point of application includes at least one fluid conduit and an...
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4704595 |
Electrical heating system for a bimetal, particularly for an electrical power control device
A power control includes a thick film resistor on an electrically insulating support plate, for heating a bimetal strip operating switch contacts connecting power to a load, and to the resistor....
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4699738 |
Electrically heated choke having improved control
An automatic choke mechanism including an electrical heater and a circuit for energizing the heater so that the choke is opened first at a relatively rapid rate and later at a slower rate. The...
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4687163 |
Railway switch control system
A control switch system for a railway switch heater with an environment probe near the switch and controlling switching on and off of the switch heater in a predetermined mode.
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4671072 |
Sensor for detecting frost deposits
A sensor (1) for detecting frost deposits, particularly on evaporators of refrigeration plants or the like is proposed, in which between the spaced heat source (3) and heat sensor (4) is provided a...
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4633061 |
Thermostatically controlled electric seat heaters for vehicles
A vehicle seat heater includes a main body adapted to be mounted on at least one of a seat cushion part or seat back part of a vehicle seat and provided with a pair of electric warming heaters. A...
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4594974 |
Switching arrangement for glow plugs of a diesel internal combustion engine
So-called quick-start glow plugs which, at normal operating voltage, are continuously connected to the operating voltage, are to be operable also at higher operating voltages. In order to protect...
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4593177 |
Reduced differential, high limit thermostat system
Thermostatic control of heating, as for a pool or spa, involves use of a heat source including a main heat generator and a mounting body, and includes: (a) a main high limit thermostat mounted...
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4587403 |
Thermostat setback controller sub-base
A sub-base for use in conjunction with thermostats for controlling air conditioned spaces includes a false heat device and a radio frequency receiver and control circuit for turning on and off the...
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4558203 |
Heating apparatus for packaged foodstuff
Heating apparatus for prepackaged foodstuffs, like nut meats in transparent packages, in which the package is dropped into a support for presenting the sides of the package to infrared radiant heat...
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4518850 |
Electric cooker having temperature warning means
An electric cooker having means for warning the user when one or more of the cooking surfaces is above a safe touching temperature comprises a glass ceramic cooking surface having one or more...
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4491723 |
Heating circuit with overheat safety control feature
A heating circuit for an electric blanket or the like comprises a heating conductor, a sensor conductor and separating means which separates the conductors and has an impedance that falls with...
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RE31596 |
Electric power controllers
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...
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RE31597 |
Electric power controllers
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...
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4413174 |
Glow plug duty cycle modulating apparatus
A control for modulating the duty cycle of diesel engine glow plugs has two heat sensitive, normally closed switches each thermally coupled to a respective positive temperature coefficient (PTC) of...
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4394646 |
Temperature indicator for a glass ceramic cooking surface
The temperature indicator has a temperature sensor which operates a switch. The temperature sensor is exposed to the heat of both the heating system of the glass ceramic cooking surface and an...
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4392050 |
Rapid response thermal switch for isolated load control
A rapid response thermal switch for isolated load control includes a bimetallic switch electrically connected to a controller and operatively connected to a switch follower which controls the...
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4375029 |
Control apparatus for thermal equipment particularly a heat engine
The invention relates to control apparatus for heat actuated devices of the type having a heating resistor and a spring biased motor member movable in response to heat generated by the resistor. A...
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4357525 |
Glow plug duty cycle modulating apparatus
A control for modulating the duty cycle of diesel engine glow plugs has two heat sensitive, normally closed switches each thermally coupled to a respective positive temperature coefficient (PTC) of...
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4350871 |
Horizontal passively cooled heater
A quartz heater, an elongated, rectilinear heating element which lies in a horizontal position in front of a reflector in an improved housing designed to enable the outer surface of the housing to...
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4349726 |
Control device for electric heating apparatus
The control device has a power regulator for the timed power to the heating system of the electrical apparatus. The heating system is provided with a temperature sensor which, up to a given desired...
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