Abstract: A device for the manufacture of molded parts from molding materials, includes a molding tool being completely closed, having a molding cavity formed therein and being divisible, a heating device having two heating plates disposed on top of each other and fastened to the molding tool, the heating plates being in mutual contact along respective contact surfaces thereof, at least one of the contact surfaces having slots formed therein, and tubular electrical heating elements with metal cladding press-fitted in the slots.

Abstract: A contact lens disinfecting unit in which the lenses are immersed in a saline solution and heated to a predetermined minimum disinfecting temperature which is maintained for a predetermined period of time. The unit has a heating system which includes a PTC thermistor as a heating element sandwiched between metal heat distribution plates, and this heating system interacts with a manually resettable thermostat to control operation of the unit.

Abstract: The deep fryer comprises an oil tank, an immersed heater (3) controlled by a thermostat (2) which disconnects the heater when the oil reaches a given temperature. The thermostat comprises an auxiliary switch (a) which controls a signal light (a-1) or some other signalling means operating at a temperature 5.degree. to 10.degree. C. below the operating temperature of the main switch (b) which controls the heater. One thus anticipates the time when the required temperature is reached. By immersing the product to be fried at that moment, one eliminates the inertia effect of the thermostat, prevents the disconnecting of the heater, and reduces the drop in temperature. The duration of the cooking cycle is reduced.

Abstract: The main container of a deep fat fryer has electrical tubular heaters outside the frying fat area and integrated in thermally conductive manner into the walls of a flow circulating shaft and which heat the frying fat in the case of upwardly directed flows through flow channels and consequently keep it in continuous flow circuit by means of a rising flow channel. For temperature regulation purposes is provided a fat temperature sensor which directly taps the fat temperature and also a temperature sensor in the form of a running dry protection means, which taps the temperature directly on the tubular heaters or the associated wall.

Abstract: The invention relates to a cooking vessel comprising a cooking pan and cover, especially a steam pressure cooker, to which a temperature-dependent resistor is attached as a temperature sensor with an attached computing device for the determination of the temperature inside the cooking pot, and for the transmission of electrical signals corresponding to the temperature detected.In order for the cooking vessel to be equipped for an exact measurement of temperature without greatly increasing costs, a measuring point covered by the handle is provided, to which a temperature sensor is attached. One of the handles of the cooking pot or cover carries a plug accommodation with connection contacts, which mechanically accommodates a computing device formed as a plug unit, and connects electrically with the temperature sensor.

Abstract: An electrical timer for a household appliance typically has an integrated circuit including an internal presettable clock registering the time of day, an internal register storing a presettable activation time, and a gate generating an activation signal when an activation enable signal is present and the clock registers the activation time. To prevent an activation signal from being generated on a daily basis without manual intervention, a bistable circuit is provided to generate the activation enable signal in response to a cycle enable signal received from the appliance operator. The bistable circuit is set to activate the activation enable signal upon receipt of the cycle enable signal, and is reset by the activation enable signal to disable the activation enable signal. For a coffee maker, the bistable circuit is preferably reset by the activation signal at the active-to-inactive transition signalling the end of brewing.

Abstract: A watering container for domestic animals having spaced inner and outer walls integrally molded from plastic with electrical heating elements contacting the inner wall controlled so that energy provided to the heating elements is progressively increased with the fall of ambient temperature below freezing.

Abstract: An electric kettle having an unrestricted spout opening is provided with an electric heating element controlled by a thermostatic simmer control or boil cutout, the thermostatic element of which is located exteriorly of the kettle body above the top thereof and adjacent to the spout opening. A steam diverter scoop extends into the spout opening to intercept the uppermost portion of the live steam flowing toward the spout opening and diverts it into heating relation with the thermostatic element to provide rapid heating thereof upon commencement of active boiling in the kettle. The thermostatic element is housed within the forepart of the kettle handle, which also serves to conceal the wires connecting the thermostatic element to the heating element and other electrical components located in the bottom of the kettle. The diverter includes a shield portion in radiation shielding relation to the thermostatic element to limit radiation of heat to the element from the kettle body.

Abstract: An electric heater for insertion into a small container and comprising a heater core, a heater can having one closed and one open end in which the heater core is operatively embedded, a heater coil carried by said heater core only on a portion thereof adjacent the closed end of the can, a thermostat extending transversely of said heater core adjacent the open end of the heater can, the thermostat being insulated from the heater core.

Abstract: The invention relates to a cooking vessel comprising a cooking pan and cover, especially a steam pressure cooker, to which a temperature-dependent resistor is attached as a temperature sensor with an attached computing device for the determination of the temperature inside the cooking pot, and for the transmission of electrical signals corresponding to the temperature detected.In order for the cooking vessel to be equipped for an exact measurement of temperature without greatly increasing costs, a measuring point covered by the handle is provided, to which a temperature sensor is attached. One of the handles of the cooking pot or cover carries a plug accommodation with connection contacts, which mechanically accommodates a computing device formed as a plug unit, and connects electrically with the temperature sensor.

Abstract: An electrically heated pot for heating the keeping warm a liquid includes a vacuum container having a vacuum region formed between the outer surface of a cylindrical internal tank and the inner surface of an external tank. The internal tank has an opening at one end. A cylindrical reservoir tank for accomodating the liquid to be heated is removably located within the internal tank through the opening. The central portion of the reservoir tank is in close contact with the inner surface of the internal tank, while an end portion thereof opposite the opening is shaped to define with the internal tank a heater mounting room. A thermostatically controlled electric heater is mounted on the surface of the reservoir tank in the heater mounting room and is removable with the reservoir tank through the opening.

Abstract: A steam cooking utensil is disclosed which includes a base; a boiling water reservoir and a condensate trough defined by the base; and a heater disposed centrally to the boiling water reservoir, mounted in the base, and coupled to a thermostat also mounted in the base. The condensate trough is disposed in annular relationship to the boiling water reservoir. A food tray defining a imperforate central surface and an array of peripheral aperatures is supported such that the imperforate surface is vertically aligned with the boiling water reservoir and the array of peripheral apertures is vertically aligned with the condensate trough. A cover having a bottom opening defined by a rim is positioned over the food tray, condensate trough and boiling water reservoir, such that the rim cooperates with an outer peripheral lip of the condensate trough to form a seal. The disclosed steam cooking utensil operates to cook food quickly, cleanly and efficiently.

Abstract: The immersion heater for an appliance includes a mounting plate, a metal sheathed electrical resistance heating element having two end portions which extend through and which are secured to the mounting plate, and a single fastening device for fixing the mounting plate to the body shell of the appliance. The fastening device comprises a threaded heat conductive stud secured to the mounting plate and a nut having a complementary thread. A raised part of the active portion of the heating element is directly secured to and only to the stud, such as by brazing. A bimetallic element is fixed directly to the stud on the outside of the body shell. The stud provides a heat conductive path between the heating element and the bimetallic element. The bimetallic element bends when the appliance is energized `dry` or when the liquid has boiled down to the element and pushes a dolly overcenter to open a pair of contacts and de-energize the heating element.

Abstract: An elongated temperature-sensing probe is positioned in a deep fat cooking vessel and is positioned so that a portion of the probe extends adjacent the electric heater submerged in the deep fat adjacent the bottom of the vessel, and a portion extends upward in the fat into the cooking zone in the vessel. The temperature-sensing probe is connected to control the power to the heater. The heater is thermally connected to the probe so that the probe receives direct conduction heat from the heater as well as senses the heat adjacent the heater and in the cooking zone.

Abstract: An attachment for use with a household blender to convert the blender to a cotton candy making machine is the subject of the present invention. An open top container is provided with a rotatable hopper for receiving the candy making ingredients including sugar. A heating element proximate to the hopper melts the sugar. A drive shaft is coupled with the hopper and is adapted to be coupled with the drive coupling on the blender motor. Thus, when the blender is turned on, the hopper rotates causing the melted sugar and other ingredients to be directed through orifices in the hopper out into the bowl. The spun candy may then be worked into a ball utilizing a stick on which the candy is gathered.

Abstract: 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 within the bath, and a microprocessor interfaced with a triac control circuit for turning on and off the heating means responsive to command from the microprocessor such that boiling cycles are automatically commenced and terminated, holding and tempering baths are readily set and the dentist is signalled the status and readiness of hydrocolloid at all times in each of multiple function bath tanks.

Abstract: A fail safe sterilizing apparatus for simultaneously sterilizing lenses contained in a lens case and a bottle of rinse solution comprising a housing having a lid displaceable between an open position and a closed position; a first heat member displaceably mounted in said housing and including a first recess for receiving a first container therein; a second heat member displaceably mounted in said housing and including a second recess for receiving a second container therein; said first and second heat members being displaced when said first and second containers are positioned in said first and second recesses and said lid is in said closed position; switch means operable only when said first and second heat members have been displaced for permitting energizing of said first and second heat members; and, control means operably associated with said switch means for simultaneously energizing said first and second heat members is disclosed.

Abstract: Heat to disinfect contact lens is supplied uniformly to a well in which the lenses are placed, from a single small heat source by providing an area of high resistance to heat flow directly above the heat source.

Abstract: 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 a kettle temperature measuring device including a thermally sensitive resistor. A connection failure of the thermally sensitive resistor is detected after a specified time interval has lapsed after starting the cooking operation. The detection is carried out in accordance with a decrease in level of the output from the kettle temperature measuring device, thereby stopping the supply of power to the heater and at the same time informing the operator of the connection failure.

Abstract: An electrically heated cooking utensil consisting of a base incorporating an electrically heated heating plate (13) having a flat upper surface and a utensil such as a frying pan (10) dutch oven or wok having a handle (11) the bottom (12) of the utensil being flat and in use lying in close contact with the heating plate (13) the utensil and the base having on them interengaging elements (23), (16) such that when the bottom of the utensil is placed on the base movement of one of said interengaging elements (23), (16) causes the elements to interlock so that the base and the utensil are interconnected in such a manner that the utensil and base can be lifted together by use of the handle and so that the utensil can be detached from the base while the base is resting on a supporting surface. Preferably interengaging elements (23) on the base are moveable by means of a lever (19) projecting beyond the base.

Abstract: A switch unit for an electric kettle or other heating apparatus which is easy to assemble and repair. The switch unit includes a steam responsive mechanism 18 which is mounted on a body 80 which is in turn mounted by an adjustable clamp 31, 35 on a head part 32 of an immersion heater 12 so that the steam responsive mechanism can be moved relative to the immersion heater 12 for alignment with a handle 11 and steam vent 33. The switch unit includes a second assembly 16 which is mounted in a socket in the heating element 12 independently of the first assembly. In a preferred embodiment the first assembly and the cover 15 are designed to allow the second assembly including the switch contacts and electrical connections to be removed from the kettle without disturbing the steam responsive meachanism 18 or the cover 15.

Abstract: 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 and which is detachably mounted in a thermal insulating frame is measured by a thermistor. Upon deenergization of an electric heater after main cooking is completed, the actual kettle temperature decreases. A time interval for the kettle temperature to go from a first temperature at the completion of main cooking to a second temperature is closely related to the actual cooking amount. The auxiliary cooking time interval is determined by a control circuit arranged in a case in accordance with the time interval described above.

Abstract: An electro-heater container comprising a cup having a bottom and including a stem type support pedestal formed as a unit with the cup, the bottom having a center aperture therein extending through said support pedestal, and an electric heater unit is secured to the bottom by a member extending through the stem and a base disc of the support pedestal for heating contents of the container.

Abstract: 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 frame structure, and a control section which includes a kettle temperature detector and a control circuit for controlling the heater so as to allow the rice to automatically and properly absorb water in accordance with the actual kettle temperature immediately after the cooking operation is started, but before the rice is substantially changed to alpha-starch.

Abstract: 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. A cooking amount measuring circuit for detecting the actual amount of kettle contents every time a cooking operation is performed, and a control circuit for controlling the operation of the heater by determining the proper time at which the heater should be turned OFF in accordance with actually measured data obtained during the cooking operation which is being performed, are arranged in a case.

Abstract: The appliance, e.g. an electric kettle has a body shell, a heating element within the body shell and having two ends which project through the body shell to the outside thereof, and a switch housing mounted on the outside of the body shell. A pair of switching contacts are opened and closed by a switch operating member or dolly. One of the switching contacts is movable by the dolly and is supported relative to the housing. The other switching contact is a fixed contact and is provided at one end of the heating element.

Abstract: 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 beta-starch to alpha-starch after main cooking is completed. The auxiliary cooking operating time is properly determined in accordance with the actual amount to be cooked when every cooking operation is performed. The actual amount to be cooked is detected by a control circuit arranged in a case in accordance with a change in actual kettle temperature measured by a thermistor after a heater is deenergized, that is, in accordance with a peak temperature obtained by "after heat".

Abstract: A heater for wet dressings comprising, a case having a base with sidewalls defining a cavity, and an insert connected to the base and defining at least one recess in the cavity to receive the wet dressings. The heater has an electrical heating element in close proximity to the insert recess for heating the wet dressings, and the temperature of the heating element is controlled in the desired range of temperature of the wet dressings.

Abstract: The appliance, e.g. an electric kettle, has a body shell, a heating element within the body shell and a switch housing mounted on the outside of the body shell. A switch operating member or dolly is supported relative to the switch housing and is operable to open and close a pair of switching contacts for interrupting and making respectively an electrically conductive path, which includes the heating element, between a pair of terminal pins. The dolly can rock about a pivot between two positions and is urged against the pivot by a leaf spring acting between the dolly and a support. The housing includes the pivot and the support and is formed as an integral plastics moulding.

Abstract: A temperature control arrangement for an electrical appliance comprises means for the attachment of the arrangement to the appliance and for the connection of the arrangement to an electricity supply whereby the appliance is supplied with electricity via the arrangement. A thermostat arrangement is provided in the arrangement and comprises a switch operable by a heat sensitive actuator. Heat transfer means are also provided whereby when the arrangement is connected to said appliance transfer of heat can take place from the appliance to the actuator so that, in use, on attainment of a predetermined temperature the actuator acts to operate the switch and affect the supply of electricity received by the appliance.

Abstract: An electrically energized heater is provided which has particular application as a dry disinfecting and sterilizing device for items such as soft lenses, dental handpieces, baby bottles, or the like, which cannot be placed in sterilizing solutions, and which cannot be subjected to excessive temperatures. The unit includes a housing, and a heat conductive substance such as wax, oil, or both, contained in the housing and used as a uniform heat transfer medium between electrical heating elements in the housing and the surface of a well which also is supported in the housing.

Abstract: 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 supply.

Abstract: 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 responds to the detecting signal from the sensor to stop the heating of the heater. The drive circuit in the cooker, after the operation start, heats the pot to about 40.degree. C. by the heater for rice immersion, and after keeping the pot warmth constant for a given period, drives the heater at the rated calorific value for rice cooking.

Abstract: 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 insulating mounting 61, which supports a movable thrust member 74 which extends from the contacts through a way within the mounting to a steam responsive actuating mechanism 18 for actuation by the latter, and the mechanisms 14 and 18 are preferably assembled on the mounting 61 to form a pretestable assembly in which the contacts are disposed in a chamber 75 within the assembly.

Abstract: A thermally-responsive electrical control for an electric heater of a water boiling container includes a switch-on-dry protector switch unit electrically connected with the cold leads of the heater and having a thermally sensitive switch means effective, in use, to interrupt the electrical supply to the heater should the element overheat through being switched-on when the container is dry. A removable steam-sensitive unit is mounted on the protector switch unit and includes an overcenter spring mechanism and a thermally-responsive actuator for the mechanism. The actuator of the said steam sensitive unit is arranged to impinged by vapor or steam issuing from the outlet of a passage leading to the interior of the container, and the electrical parts of the control are shielded from such vapor or steam.

Abstract: An electrically heated container for boiling liquids is provided with a thermally sensitive electrical control including a switch-on-dry protector switch unit directly connected with the cold leads of an electric heating element located externally of the container and in contact with the bottom wall thereof. The protector switch unit includes a thermally sensitive switch means enclosed in a protective housing having projecting terminal pins engageable by a female socket connector. The protector switch unit is mounted on a thermally conductive mounting plate located externally of the container and in contact with the heating element. The plate is enclosed by a detachable base member on the container. A steam-sensitive switch unit is mounted on the protector switch unit and includes a thermally sensitive element arranged to be impinged by steam produced by liquid boiling in the container and mechanically coupled to the switch means of the protector switch unit for deenergizing the heating element.

Abstract: Apparatus for precisely regulating the paraffin temperature in an electrically heated tissue processor comprises a sensor which is detachably fastened to the tissue processor by a clamp so as to be partially immersed in the paraffin. A controller, coupled to the sensor, and coupled in series with the tissue processor heating element by a plug tap across a source of alternating current voltage, is responsive to the conduction state of the sensor and controls the delivery of power to the tissue processor heating element in accordance with the paraffin temperature as sensed by the sensor.

Abstract: Electrical heating apparatus, including a frame formed of insulating material having an opening formed therethrough, a heating element formed of positive temperature coefficient material having two opposing outer surfaces and being disposed in the opening formed in the frame, an electrically-conducting current supply contact layer disposed on each of the two opposing outer surfaces of the heating element, an electrically conducting current input electrode plate formed of yieldable material being anchored in the frame and being disposed on each of the contact layers forming an integral structural unit enclosing the heating element, and a heat conducting plate formed of insulating material disposed on each of the electrode plates receiving heat transfered through the contact layers and clamping the heating element under pressure.

Abstract: Apparatus for disinfecting contact lenses by heating, comprising a reservoir designed for holding a liquid and having a tight lid together with a heating device for heating of liquid therein, wherein the reservoir comprises a raised middle part or bridge for dividing said reservoir into two separate chambers or wells, and having a built-in heating device for direct heating of the liquid in said chambers.

Abstract: A plastic reinforced fiberglass container has heating element integrally bonded into the container's interlaminate structure and preferably between the corrosion liner and the structural lamina to permit efficient heating of the container contents. A thermocouple is also embedded in the interlaminate structure and preferably positioned at the same location to achieve sensitive temperature control of the container's contents.

Abstract: There is disclosed a disinfecting unit specifically designed for false or artificial dentures. The unit includes a base providing a cavity, having a support wall partially defined by a heater block. A receptacle for the dentures is provided, which is of sufficient size to accommodate dentures and a quantity of disinfecting solution. The support wall is spaced from the bottom wall of the base to accommodate the circuit and operating components, which include a re-set thermostat and a rockably mounted lever for operation of said re-set thermostat.

Abstract: Heating device with a heating element of a material with positive temperature coefficient, of which two opposite sides are contacted by planar electrodes and give off the heat produced through the electrodes and planar sheets of insulating material covering the same to two heat-absorbing surfaces of a heater. The sheets of insulating material are coated on their side facing the heating element over a large area with a solder and are soldered to the electrodes. This insures permanent good heat transfer between the electrodes and the insulating material covering them. The firmly joining together of the heating element and the sheets of insulating material to form a structural unit facilitates the assembly, i.e., the installation of the heating device.

Abstract: The method and apparatus disclosed herein provide a stratified heat bath for use in the heating stage of thermoplastic deformation. It allows for heating of central sections of the thermoplastic lengths in order to render said lengths susceptible to deformation without heating the end sections or tangents of said lengths, permitting the ends to retain their original shape. In the case of tubular lengths, such as lengths of PVC pipe, the invention provides for more rapid heating than in the prior art.

Abstract: A primary thermostat is provided in a fryer of the type comprising a frypot containing cooking oil, a heater, heat control switching means for operating the heater and a thermostat including a temperature probe, the fryer thermostat being used as a backup to the primary thermostat. The primary thermostat utilizes the signal of a temperature probe associated with a cooking computer which calculates the cooking time period for food items cooked in the fryer. The primary thermostat includes comparators monitoring for open or shorted conditions of the cooking computer temperature probe, and a control transfer relay which switches thermostatic control of the fryer from the primary to the backup fryer thermostat in the event of probe failure. The primary thermostat also includes a temperature selection switch for selecting a desired temperature of the cooking oil and temperature control circuitry for operating the fryer heater to maintain the desired temperature.

Abstract: 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, including the twice cooking time period, and a display for displaying the operation of the timer during the predetermined time period.

Abstract: 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 from the heater to the timer.

Abstract: An electric rice cooker comprising 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, and a timer which comprises a motor for causing a movement of the timer and three contacts for controlling the energization and the reenergization of the heater during timer action.

Abstract: A Peltier effect thermal control sample containment means for an automatic sample holding apparatus used in conjunction with a liquid chromatograph analysis. The apparatus provides for the cooling or heating of a plurality of liquid chromatography samples and the maintenance of said samples at specific temperatures for extended periods of time.

Abstract: The electric cooking appliance has a casing for receiving a removable vessel in which food to be cooked is placed. An electrical heating element is provided in the casing for heating the vessel. The supply of electrical power to the heating element is controlled by a control device including a supply switch and a manually settable control circuit arranged during the normal cooking phase to intermittently place the supply switch in its conducting state so that power is supplied to the heating element intermittently. Prior to the normal cooking phase, the control circuit maintains the supply switch continuously in its conducting state for an initial period of time which is independent of the manual setting of the control circuit.

Abstract: An electric heating appliance such as a coffeemaker, has a metallic base with an upper exposed surface and an electric heater on its lower side for heating the surface by conduction. A thermostat comprising a plastic-walled packaged unit with an opening through which an internal bimetal sensor is exposed is provided for controlling the heater and is mounted in a depressed niche formed in the surface of the heater. A detachable U-shaped metallic cover covers the opening and includes a heat-conducting projection extending through the opening very closely adjacent the sensor. The thermostat is positioned so that the cover faces and abuts the surface of the niche and a flexible clamp secures the thermostat in the niche and biases the projection and sensor closely together for fast thermostat response. The base may be an aluminum casting with the heater comprising a cast-in circular sheathed electric heating element.