Abstract: Hair curler which has a pair of substantially semi-cylindrical, metal members having opposed side faces. The members are joined at one end by a bridge that separates the side faces of the metal members by a distance adapted to receive a rail-like heat conductor.

Abstract: A method and an apparatus for detecting the crack of a heater of an acid and rinse bath, acid and rinse bath is filled with acid solution, a heater is used to heat the acid solution. A heater is constituted of a hollow quartz tube with one closed end and one open end, the closed end is submerged into acid solution, part of the quartz tube is exposure in the air. The heated filament is inserted into the open end of the heater through the closed end of the heater, moisture detecting device is attached on the inner side wall of the quartz tube, use chemicals that will change color by absorbing moisture, or use electronic component to detect the humidity, monitoring the variation of moisture in the quartz tube to acknowledge is there any crack of the quartz tube, and replace the defect quartz tube before too late.

Abstract: A heating element comprising:a body having a heating section;heating means inserted in or adjacent to said body, said means capable of generating heat, having a heat flux Q.sub.1 at a temperature T.sub.1 ; andheat transfer and concentration means capable of transferring said heat from said heating means to said heating section and concentrating said heat in said section such that said section has a heat flux Q.sub.2 at a temperature of T.sub.2, where Q.sub.2 is greater than Q.sub.1 and where T.sub.2 is equal to or less than T.sub.1.

Abstract: An annularly shaped housing extension is adapted to be inserted into the top of a coupling, the bottom of which is fitted on to the top end of a sewer vent pipe, the housing containing heating cable which, when energized, causes the transfer of heat from the heating cable to an inner sleeve of the housing which becomes a defacto extension of the vent pipe.

Abstract: A formed integral heated molding torpedo device for maintaining at a controlled elevated temperature material passing over an exposed surface of the device which has an integral casing containing a resistance wire wound core embedded in heat transfer electrical insulation material, with leads connecting the wire wound core to a source of power exiting from one end of the torpedo device, wherein the torpedo device is bent so that its heat transfer surface is arranged angularly to its end from which the leads exit. The invention also includes steps for making such a heated molding torpedo device.

Abstract: A heater for the middle, bus bar compartment of a switchgear cabinet is inserted from the rear compartment through an opening in a vertical panel at the rear of the middle compartment and is supported within the middle compartment by a bracket cantilevered from the panel. The bracket is U-shaped with a horizontal base and a pair of upstanding side walls forming rails on which the heater slides. The heater includes an inverted U-shaped guard over the heater element forming downwardly facing slots which engage the bracket rails. The guard and the bracket are perforated for convective circulation of air induced by the heater.

Abstract: A steamer is provided comprising a tank shell, one or more top doors acting as a cover to the steamer, a food holding grid inside the tank shell, and an elongated open-top water tray below the food holding grid to keep the steamer and food therein at a desired temperature.

Abstract: An electronic heater structure includes a tube body, a heating wire disposed on the bottom of the interior of the tube body and a temperature controlling circuit. The temperature controlling circuit employs a thermosensitive resistor for detecting the temperature and controlling the activation time of the heating wire. The temperature controlling circuit employs a relay for controlling whether the heating wire is powered on or off. An upper cap of the tube body is integrally formed with a projecting chamber for placing a thermosensitive resistor therein. The relay and the thermosensitive resistor are isolated from each other by a circuit board. The tube body is vacuumized to remove the thermoconductive medium therein. Except for the heating wire, the temperature controlling circuit itself will not generate high heat and emit electro-magnetic interference and the detection portion with the thermosensitive resistor can extend into the water to accurately detect the water temperature.

Abstract: There is provided a uniform heating structure in the heating device formed in the shape of a hollow block made of a heat-resistant metal, in which the surface of the heating device is used as a heat transfer surface, and a high thermal-conductivity material with a thermal conductivity higher than the thermal conductivity of the metal is located adjacent to the heat transfer surface in such a manner that heat can be transferred to the heat transfer surface.

Abstract: A heating assembly for imparting energy to a liquid which is enclosed in a vessel, is described and which includes a base plate borne by the vessel and having a first portion which has a given first mass, and a second portion which is made integral with the first portion and which has a given second mass; a heating element borne by the second portion of the base plate and disposed in heat emitting relation relative to the liquid in the vessel; and a temperature sensor mounted in heat sensing relation relative to the second portion of the base plate.

Abstract: A temperature-controlled container for transporting biologic tissue and human skin is set out wherein an outer insulated container houses a power source, a thermostat means, a heating means, a power source and interior container along with a retention means for holding the sample in place and a lid that interlocks with the open annular area by a T-shaped friction plug. The thermostat means may be a microchip and heating element so that the sample and interior temperature does not vary from a given temperature parameter.

Abstract: Oven, for example, embodied as a foam tester, can heat and cool circulating gas, and hence, contained sample containers, rapidly. A volume for containing coolant material is provided for cooling the oven volume is provided apart from the oven volume, and the cooling volume is adapted to contain cooling material, at least during operation of the cooling cycle. Optionally, the cooling volume can be closed off from the oven volume when the device is in heating mode and opened when in cooling mode, but preferably, it is not but has a drainable liquid, for example, water, cooling system installed in the cooling volume. The device may have an air plume; preferably however, it has such a plume eliminated with high circulation blowing and mixing of the bath gas, for example, air, provided. Accessories such as a removable drain tray, and so forth, may be added.

Abstract: The reservoir system includes a heater coil having electrical leads adapted to be coupled to a voltage source. The heater coil is adapted to generate heat in correspondence with a heater voltage provided by the voltage source. A reservoir material layer is adapted to regulate pressure of a gas disposed within the gaseous-discharge device in accordance with temperature of the reservoir material. Heat is transferred from the heater coil to the reservoir material through a series of thermally conductive layers in which each of the layers have different thermal conductivity and coefficients of expansion. As a result, the thermal path resistance between the heater coil and the reservoir material layer increases as temperature of the heater coil increases so that the reservoir material increases in temperature at a slower rate than the heater coil.

Abstract: A compact, portable warmer which is insertable into a bottle for the purpose of warming and stirring contents of the bottle. The warmer has a projecting heating element having a stainless steel sheath configured similarly to a paddle, and a cap for protecting the heating element from contamination and for protecting external objects from heat from the heating element. The portable warmer includes a battery for powering the heating element, an on-off switch, and an electrical cable for recharging the battery from a socket of a cigarette lighter of a motor vehicle.

Abstract: A method and system of heating a body of molten aluminum, for example, contained in a heating bay, the method comprising providing a body of molten aluminum; projecting an electric powered heater into the body of molten aluminum; passing electric current through the element and adding heat to the body of molten aluminum. The heater is comprised of a sleeve suitable for immersing in the molten aluminum. The sleeve may have a closed end and is comprised of a composite material comprised of an inner layer of titanium or titanium alloy having an outside surface having a refractory coating thereon exposed to the molten aluminum, the refractory coating resistant to attack by the molten aluminum. An electric heating element is located in the sleeve in heat transfer relationship therewith for adding heat to the molten aluminum.

Abstract: A formed integral heated molding torpedo device for maintaining at a controlled elevated temperature material passing over an exposed surface of the device which has an integral casing containing a resistance wire wound core embedded in heat transfer electrical insulation material, with leads connecting the wire wound core to a source of power exiting from one end of the torpedo device, wherein the torpedo device is bent so that its heat transfer surface is arranged angularly to its end from which the leads exit. The invention also includes steps for making such a heated molding torpedo device.

Abstract: Electrical resistance heating elements are provided which are useful in heating fluid mediums, such as air and water. The heating elements include an element body having a supporting surface and a resistance wire wound onto the supporting surface which is connected to a pair of terminal end portions. Disposed over the resistance wire, and over most of the supporting surface, is a thermally-conductive polymeric coating which hermetically encapsulates and electrically insulates the resistance wire from the fluids to be heated. This thermally-conductive polymer coating has a thermal conductivity value of at least about 0.5 W/m .degree.K. Improved properties are preferably provided by ceramic powder, such as Al.sub.2 O.sub.3 and MgO, and glass fiber additives.

Abstract: Self-regulating heating element for heating a gaseous flowing medium with a strip conductor (1) and a control conductor (2) which are electrically connected to one another in series and are in thermal contact with one another over their length, but which are electrically insulated from one another. The Control conductor (2) is preferably formed of a jacketed conductor with a metallic jacket which is electrically connected to the strip conductor (1).

Abstract: A purge manifold assembly, which can be used in a gas purged immersion heater, includes a housing having a vessel wall having an aperture extending therethrough. A purge manifold is located adjacent the vessel wall. The purge manifold includes an aperture extending therethrough and colinear with the vessel wall aperture, a bore extending in the purge manifold, in a direction approximately normal to the purge manifold aperture, and a port communicating the bore with the purge manifold aperture. A fitting body extends into the vessel wall aperture and the purge manifold aperture. The fitting body includes a longitudinally extending through bore and a port communicating with the through bore. The port also communicates with the port of the purge manifold. In this way, a purge gas is allowed to flow through a sheath enclosing a heater wire held in the housing of the gas purged immersion heater.

Abstract: An underwater heater for warming water in an aquarium comprises a thermal sensor for sensing temperature of a main heater body and a control unit for controlling operation of the main heater body via reception of a detect signal output from the thermal sensor. In addition to a switch device for opening and closing a power-supply circuit for supplying power to the main heater body, the control unit further comprises a drive circuit, an abnormality-detection circuit, and a memory circuit. Whenever the abnormality-detection circuit detects that the thermal sensor has detected an abnormal temperature, the drive circuit activates the switch device to open itself to cause power supply to the main heater body to be shut off and to simultaneously cause the memory circuit to store the abnormality-detected condition therein.

Abstract: The carrying case for storing and transporting heated articles includes a thermal storage assembly having a heat retention member for absorbing and retaining sensible heat and for releasing the sensible heat of a extended period time. The thermal storage assembly includes a heating coil assembly secured to a surface of the heat retention member. The heating coil assembly includes a resistive heating coil disposed adjacent to the heat retention member. The heating coil has a power cord connected to the coil with the coil being retained within a sealed thermally conductive pouch.

Abstract: The present invention provides a windshield with a heating arrangement to heat the wiper rest area of the windshield. The windshield includes first and second glass sheets secured together by an interlayer. A single, continuous resistance heating wire is secured between the glass sheets and makes multiple passes through a predetermined portion of the windshield generally corresponding to the wiper rest area such that the wire generates a desired power density within the predetermined portion to heat the wiper rest area. Opposing first and second ends of the wire extend to common connection area along an edge of the windshield and a connector secured to the wire ends provides for external electrical access to the wire. The wire may also extend along a marginal edge portion of the windshield generally corresponding to its A-post area.

Abstract: In order to arrange an electric heating element in a housing of a thermostatic working element and to guide connecting lines to the outside in a sealing manner, a base made of plastic is injection molded into an opening of the bottom through which the connecting lines are guided to the outside.

Abstract: An immersion heater for corrosive fluids includes an electrically resistive material strand operative upon connection to a source of power to provide heat. A thermally conductive electrically insulating fill material is disposed around the electrically resistive material strand. An electrically conductive sheath encases the fill material. A tubular jacket of a flexible chemically inert material encases the electrically conductive sheath. A fluid flow passage is defined between the tubular jacket and the sheath for allowing a fluid to flow therethrough. The fluid is a purge gas that flows between the sheath and the jacket in order to remove any corrosive fluid which may have penetrated the jacket. A method for manufacturing an immersion heater is also disclosed.

Abstract: A thermostatic working element has a housing in which an electric resistance heating element is arranged whose electric connecting wires are sealingly guided to the outside. The resistance heating element contains a carrier body on which a resistance layer is mounted to which the connecting wires are soldered. A base is molded to the carrier body and is sealingly arranged in the housing.

Abstract: A electric heating apparatus for de-icing pipes includes a flexible hose with a closed bottom end and a top end. The hose has a pair of insulated wires situated within an interior of the hose and a plug coupled to the top end of the hose. The plug has a pair of contacts connected to the wires and adapted to be inserted within a conventional electrical receptacle for providing electrical power to the wires. By this structure, the hose is adapted to be passed within a pipe connected to a source of water. Next provided is a thermostat having an input connected to the insulated wires and is adapted to allow the transfer of power to an output thereof upon the detection of a temperature below a predetermined degree. The thermostat is situated within the interior of the hose adjacent the bottom end thereof. Also included is a heating coil formed within the hose, wherein the coil is connected to the output of the thermostat for radiating heat upon the receipt of power.

Abstract: A compact immersion heater, for aquariums, includes: a watertight tubular container (2); an electric heating component (4); an adjustable thermostat (3); an electric circuit (6, 7, 8, 9) for connecting the heating component, arranged in series to the thermostat, to an external electric power source. The heating component is mounted in a radially offset and longitudinally superimposed position with respect to the thermostat and is accommodated in a torus-like gap formed between the thermostat and the inside surface of the container. The heating component is a resistive component having a laminar structure formed by a layer (16) of an electrically resistive material that is anchored to an electrically insulating and heat-resistant flexible laminar support (15). The layer of resistive material is a PTC ink that is printed onto the support in selected regions (17) that are connected to paths that conduct the electric power supply, directly face the sensitive part of the thermostat, and are adjacent to it.

Abstract: A heating device for a fluid storage tank is provided. The heating device comprises a heat tube including first and second elongate hollow legs which are joined together at an angle relative to each other so as to enable fluid flow therebetween. The first and second hollow legs being at least partially filled with a heat transfer fluid and being adapted to be disposed in a fluid storage tank with one leg extending generally longitudinally relative to the tank and one leg extending generally transversely relative to the tank adjacent a bottom wall of the tank. A heater is arranged in an aperture adjacent one end of the first elongate hollow structure. A safety relief valve can also be arranged on the heat tube so as to enable venting of an excess pressure condition of the heat transfer fluid.

Abstract: Disclosed is an improved electric heater assembly suitable for heating molten metal, the electric heater assembly having a sleeve comprised of a closed end suitable for immersing in the molten metal. The sleeve is fabricated from a composite material comprised of titanium alloy and having an outside surface to be exposed to the molten metal coated with a refractory resistant to attack by the molten metal; and an electric heater located in the sleeve in heat transfer relationship therewith.

Abstract: An improved electric heater assembly suitable for heating molten metal, the electric heater assembly having a tube comprised of a closed end suitable for immersing in the molten metal. The tube is fabricated from a composite material comprised of a metal having a coefficient of thermal expansion of less than 10.times.10.sup.-6 in/in/.degree. F. and having an outside surface to be exposed to the molten metal coated with a refractory resistant to attack by the molten metal; and an electric heater located in the tube in heat transfer relationship therewith.

Abstract: An electrical heating device to prevent freezing of water within an ice fishing hole which includes a sleeve, an electrical resistance heater and a pair of electrical leads. The sleeve substantially forms a circle with an inner and an outer surface. The outer surface contacts the ice at the periphery of the ice fishing hole with sufficient outward pressure to suspend the heating device within the ice fishing hole. The electrical resistance heater is mounted to the inner surface of the sleeve and includes an electrical resistance heating element (or elements) enclosed within a waterproof jacket. The waterproof jacket forms a substantially circular base which is connected around the inner surface of the sleeve. The pair of electrical leads extend from the electrical resistance heater and connect the electrical resistance heater to a battery.

Abstract: The present invention relates to an electric immersion heater utilized in heating liquids contained in a cylindrical container, such as a boiler. The immersion heater is affixed to the side of the container with the heater elements extending through the side of the container through an access hole. The heater elements are contoured so as to allow more than one heater to be installed at a given level through the side of the container.

Abstract: In a heater unit comprising a case 10 which accommodates therewithin an electrical heating element 11 and a temperature sensor 12 for detecting the temperature of the case 10 heated by the electrical heating element 11 to stop the power supply to the electrical heating element 11 when the temperature reaches a predetermined value, there is provided a heat conductive path 20 made of a material having a higher heat conductivity than that of the material making up the case 10 and extending from a region corresponding to the space in which the electrical heating element 11 or heater is placed to a region corresponding to the space in which the temperature sensor 12 or temperature detecting and power supply control member is placed. Thus, the heater unit for an aquarium fish tank is prevented from being extraordinarily heated when the tank has been destroyed.

Abstract: A temperature control heater with sink type glass tube liquid crystal (LCD) display, especially relates to a temperature control heater having a structure for display the temperature precisely, the mainly structure thereof is comprised of a single opening tube, and a liquid crystal (LCD) display temperature control circuit board and a heating coil set is arranged with said tube, finally a plug and a cover are used to tightly seal the tube.

Abstract: Foam tester device, which is useful for testing the foaming of liquids at elevated temperatures, has an insulated cabinet containing a temperature-regulatable volume; a heater capable of heating a gas for the volume; a feature to circulate heated gas in the volume; an access system such that sample container(s), each capable of holding a liquid sample, is(are) insertable into the volume so as to be heated; and a feature, for example, a window, to observe any sample(s) in the sample container(s) such that observation can be conducted from outside the cabinet. The foam tester is a gas, especially air, bath. Cooling may be provided by water or other liquid, for example, propylene glycol and water mixture, and/or by insert of a cooling device, for example, a cooling carosel or insert drawer in place of the foam tester sample carousel. Foam test operation is simplified, and the foam tester may be employed to operate sample testing cycles without removal of samples from the tester between tests.

Abstract: A Deglor furnace includes heating elements each having a heater rod being surrounded by a protective tube. The protective tube is mounted on a ceiling of the Deglor furnace and is run through an opening in the ceiling into the interior of the Deglor furnace. Heat insulation of the ceiling which borders the opening is protected against corrosive gases from the interior by a shield.

Abstract: Device for heating the internal surface of the open end of plastic tubular containers, consisting of a heating head (1) which has a cross-section corresponding to the shape of the tubular container and can be coaxially inserted so as to make contact, inside the open end of the tubular container (3) itself, along a section corresponding to the section (3a) to be softened internally, a heating head (1) being provided internally with electrical heating resistances (2), there also being provided a device (3) for pressing the tube against the heating head (1) during heating so that the heat is transmitted to the internal surface of the container of direct-contact conduction.

Abstract: An extended life electrical heating element for a water heater includes a coiled heating resistance wire having a uniform power output per coil turn. Where the heating resistance wire passes through the sheath at critical areas, e.g. return bends, the number of coil turns per unit length of element is reduced to reduce thermal power output per unit length of the element. The number of coil turns per unit length of element in bend areas may be reduced by simply stretching the coiled heating wire to attain the desired length of resistance wire per unit length of the element. Resistance wires of differing heat output per unit length may be combined with different degrees of stretching to achieve the desired element temperatures. The reduced power at the bend portions reduces element temperature to reduce hard water scaling and significantly extend the life of the element.

Abstract: A sunken receptacle unit for insertion in an opening of a counter having a top surface and a bottom surface includes a receptacle having a bottom and a plurality of walls defining an interior cavity, a receptacle support surface extending outwardly from the walls for supporting the receptacle within the opening and a receptacle retaining surface coupled to one of the walls. The receptacle retaining surface moves between a first position beyond the opening for engaging the bottom surface of the counter and a second position within the opening for insertion of the unit through the opening. The receptacle retaining surface is resiliently biased in the first position.

Abstract: A device for heating the water in an aquarium comprises a casing, and housed in the casing, at least one heater element, a thermostat, an electrical circuit by way of which the heater element and thermostat are wired in series to an external power supply, and a control facility for regulating the heater element, which is connected to the thermostat and can be activated from externally of the device; the operation of the heater element is indicated by a lamp. The casing affords at least one internal cavity consisting in a tubular glass wall around which the heater element is wrapped, and having open ends so that the water can pass through.

Abstract: This invention relates to a tip heater for a runnerless injection molding heating probe and to methods for constructing and repairing the same. The tip heater comprises a generally conical shaped tip, a heating wire, insulating material, and a cap. The tip heater is attached to a heating probe positioned within resin channels communicated to mold cavities. The tip heater is characterized by removable and replaceable tips and/or caps which allow the tip heater to be repaired.

Abstract: An apparatus and method for enclosing and heating a fluid flow control device. The apparatus includes a cover assembly and a heater element. The heater preferably has an elongated body for placement on or adjacent to the ground on which the fluid flow device extends. The method is directed to the use of the apparatus and positioning the heater in order to establish a substantially uniform thermal gradient within the cover in the range of less than two degrees per vertical inch of elevation.

Abstract: A heating element for a Deglor furnace includes a heating bar being surrounded by a protective tube. The protective tube is provided with a flange for mounting. The flange is formed by a separate ceramic ring or a metal clip and is permanently connected mechanically or chemically to an outer surface of the protective tube.

Abstract: A heater for heating a liquid in which the electrical contact between a PTC thermistor and electrode plates is surely realized, and the thermal coupling and the thermal efficiency are excellent. In a case 1, an internal space 13 has an opening 14 at one side portion, and the whole of the periphery of the case is closed except the opening 14. A pair of electrode plates 21 and 22 have projections 211 and 221 on faces 212 and 222, and are housed in the internal space 13 of the case 1 in such a manner that their other faces 223 are opposed to heat radiating faces 11 and 12. The PTC thermistors are disposed between the electrode plates 21 and 22 in such a manner that projections 211 and 221 are contacted with the electrodes 32 and 33, respectively. Thermal conductive fillers 41 and 42 made of a resin are charged between the electrodes 32 and 33 of the PTC thermistors 3 and the electrode plates 21 and 22 so as to fill the gaps which are formed by the projections 211 and 221.

Abstract: Polymeric heating elements and water heaters containing these elements are provided by this invention which utilize polymeric materials in contact with electric resistance heating materials and in contact with fluid to be heated. These polymeric materials also provide a substantially self-supporting structure for the resistance heating material. The heating elements include an electrically conductive resistance material capable of heating fluid when energized. The winding is insulated and protected by a polymer layer integrally disposed over the resistance material. The elements are lightweight, inexpensive to produce and use, and minimize galvanic corrosion and lime depositing without sacrificing heating capacity.

Abstract: An electronic immersion heater includes a tube closed at one end that contains in succession from its bottom to its open end: a heating element, an electronic circuit board with the corresponding support and with a temperature sensor, and a hermetic plug. The electronic heater is characterized in that the sensor is pushed into direct or indirect contact with the tube by means of a single helical spring, which furthermore simultaneously acts as a spacer and as an electrical contact, without conventional rheophores, between the temperature sensor and the electronic circuit board.

Abstract: A defrost heater for a cooling appliance, such as a refrigerator or freezer, which has multiple sets of evaporator coils includes a formed glass tube enclosing an electrical resistance wire. The glass tube is substantially bell-shaped, the opposite ends of which are mounted below one set of evaporator coils. The heater includes upwardly curving portions extending upwardly in the clearance between two of the sets of evaporator coils and a downwardly facing portion connecting the upwardly extending portions of the tube which lies adjacent to the lower edge of an upper set of evaporator coils.

Abstract: A preheating screw for the simultaneous mixing and heating of fine-grained or paste-like substances, in which intensive heat transfer takes place during transport of the substance by use of a rotating hollow screw that is filled with a heat-transfer medium, preferably a fluid, heat being transfered from the heat-transfer medium to the product by way of the heated hollow screw. An electrical heating device is installed in a hollow screw shaft, and is supplied with electrical energy via sliding contacts positioned on the outside of the screw shaft.

Abstract: A multi-apertured ceramic disk heat conductor support for use in a heating element for electrically heating industrial furnace installations. The ceramic disk has a center aperture extending between exterior surfaces on an axis of symmetry for receiving a supporting element. Further apertures extend are provided for receiving heat conductors. The further apertures are equidistantly disposed around at least one circle which is coaxial with the center aperture. The further apertures have a respective axial portion, and a respective widening portion at least at one end thereof which increases in diameter from the axial portion toward a respective exterior surface of the ceramic disk. A rounded transition region between the axial portion and the widening portion is provided and the length of the axial portion is less than one-half the thickness of the ceramic disk.

Abstract: A housing (10) for use with an electrical heater (H) mounted on the sidewall (S) of a container (C) for heating a fluid (L) in the container. A heating element (R) is installed in a fitting (F), and the housing facilitates connection of electrical conductors (E) to the heater regardless of its location. A base (12) has an opening in which the fitting is received. The base is positioned against the sidewall when the heater is installed. A cover (36) is sized to fit over the base and attaches thereto. The base has an opening (22) therein through which the electrical conductor is routed for connection to an outer end of the heating element. A ring (26) is used to attach the heater to the base. The baseplate captures the one end of the fitting so the base is freely rotatable with respect thereto. Rotation of the base positions the cover so the conduit opening is readily accessible to an installer thereby to facilitate connection of the conduit to the heating element regardless of the heater location.