Abstract: Electric device with electric connection means suitable for connecting it to an electric power source, comprising a supporting surface for a textile electrically conductive band and retention means for retaining the textile electrically conductive band on supporting surface. Electric connection means comprise piercing means for piercing the textile electrically conductive band which are suitable for conducting an electric current. Textile electrically conductive band is made of double weaving and comprises two mutually parallel electrically conductive guides extending along the band. Each of the electrically conductive guides is located between two layers of textile material of said double weaving.

Abstract: Assemblies, machines, systems, and methods for the generation of superheated are discussed A steam super-heat assembly is employed for generating superheated steam for the preparation of coffee-based beverages. The assembly includes a body that includes an internal cavity, a heating element that includes heating surfaces positioned within the internal cavity, and a flow path within the internal cavity. The body also includes an input that enables fluid access into the internal cavity and an output that enables fluid egress out of the internal cavity. The heating element heats the heating surfaces of the heating element. The flow path enables fluid to flow from the input, through the internal cavity of the body, and to the output of the body. The heating surfaces form a portion of the flow path. When the fluid flows through the internal cavity, the fluid is in direct physical contact with the heating surfaces.

Abstract: The heat medium heating device includes: a casing in which the flat heat exchange tubes 12 and the PTC heater 13 are stacked in multiple layers and incorporated; and a control substrate of the PTC heater 13 incorporated in the casing. In the heat medium heating device in which a terminal 25A extending from each electrode plate 25 of the PTC heater 13 is directly connected to a connection portion of the control substrate, the width dimension of the flat heat exchange tubes 12 is greater than a contact surface width in a direction in which the terminal 25A extends from each electrode plate 25 in the PTC element 24 of the PTC heater 13, and the electrode plates 25 and the flat heat exchange tubes 12 excluding the PTC element 24 are superimposed in the wide portion.

Abstract: A temperature control system includes a temperature control circuit having a plurality of predetermined temperature values, a switch control circuit and a heating control circuit. The temperature control circuit outputs control signals according to the plurality of predetermined temperature values. The switch control circuit turns on according to the control signals and outputs the DC voltage to the heating control circuit which begins to get hot. The temperature control circuit detects a temperature of the heating control circuit from time to time and turns off the switch control circuit when the temperature of the heating control circuit is equal to a selected predetermined temperature.

Abstract: According to one aspect, a system for reducing peak power usage of an electromechanically controlled cooking appliance is provided. The system includes at least one infinite switch, one or more heating units, at least one of which comprising at least two separately controllable resistive heating elements, a control operatively coupled to the one or more heating units, the control being configured to receive and process a utility state signal indicative of the current state of an associated utility, wherein the one or more heating units include at least one relay switch configured to selectively enable and disable energization of one of the elements in response to the utility state signal.

Abstract: Direct current power gained by photovoltaic cells can be used for heating water in a boiler. Simple installation allows use for domestic or industrial purposes, with a minimal impact to building construction. At the time of lack of sunlight intensity, water heating is provided by gas, or other heating source, or by use of a heating coil supplied by alternating current for that heating. When sunlight intensity is high, the photovoltaic cells of the present invention can be used alone. However, the source of the direct current has to be properly dimensioned in dependence on the volume of the boiler. An output 1 kWh of the source of the direct current gained by photovoltaic cells can be used to heat water of a volume of 100 L.

Abstract: A thermal fuse integrated into an electrical circuit powering a heater element having a positive temperature coefficient includes at least one terminal in electrical connection with the heater element thereby connecting the heater element to a power source, and a solder jacket that mechanically retains the electrical connection between the terminal and heater element, wherein a biasing load is applied to the terminal when retained by the solder jacket, and wherein the terminal breaks connection with the heater element under the force of the bias when the solder jacket melts should the heater element overheat. By selecting the solder material forming the solder jacket according to its melt temperature, a temperature specific overheat protection for a heated fuel injector can be provided. Since the injector's metering circuit is separate from the thermal fuse circuit, the fuel injector remains operational even after the heater circuit is opened.

Abstract: The invention provides a retainer system for retaining a positive temperature coefficient resistor in a heater housing shaft having a shaft side wall. The retainer system includes a base, a spring, and shaft engagement means. The spring is formed in and spaced apart from the base. The spring extends radially outwardly from a longitudinal axis of the base and the spring has a neck that curves radially backwardly, spaced apart from the base and toward the longitudinal axis of the base. The spring also has a contact surface presented outwardly, away from the base. The shaft engagement means are for engaging the shaft side wall and securing the base within the shaft at a desired distance from the resistor. The retainer system can be secured within the shaft with the spring flexed to a desired extent and with the contact surface urged against the resistor to retain the resistor in the shaft.

Abstract: The invention relates to a fluid-heating device (1) comprising: a fluid circulation conduit (5), electric heating means (4), and a switch (6) which can be moved selectively between a configuration in which the electric heating means are powered and a configuration in which the electric power being supplied to the electric heating means is cut off. The invention also comprises a thermally-fusible part (7) which is intended to be heated by the electric heating means when in operation and which is designed (i) to fuse at least partially when at least one area (8) of the electric heating means exceeds a critical temperature threshold and (ii) to move the switch (6) from the power supply configuration to the power cut-off configuration.

Abstract: A heating pad is provided. The heating pad includes a heating element and a control circuit operatively connected to the heating element for providing a predetermined level of power thereto. An isolation device interconnects a power source to the control circuit. The isolation device has a first open configuration preventing transmission of electrical power therethrough and a second closed configuration allowing transmission of electrical power therethrough. The control circuit terminates power to the heating element in response to the heating element exceeding a first temperature limit. The isolation device moves from the closed configuration to the open configuration in response to the heating element exceeding a second temperature limit.

Abstract: A current-limiting device is provided with pressure relief facilities that are responsive to relieve internal pressures during operation of the current limiter. In a specific arrangement, the pressure relief arrangement includes a passage that is opened upon operation of the current limiter to communicate between the interior and the exterior of the current limiter. The passage includes a fusible material therein that is melted by the heating within current limiter under predetermined high-current fault conditions. In a specific arrangement, the passage is formed through a contact terminal of the current limiter. In one arrangement, the current-limiting device includes an adjoining exhaust section and the contact terminal extends into the adjoining exhaust section.

Abstract: The circuit breaker according to the present invention has first and second terminals having favorable electric conductivity and joined to each other with solder; and a heater whose circumference is insulated installed for melting the solder and supplied with electric power from the current path separate from current paths passing through the first and second terminals; wherein the first and second terminals are separated by a spring force and insulated when the solder is melted.

Abstract: A hot melt adhesive hose assembly comprises a heater circuit wrapped around an external surface portion of the hose assembly, a temperature sensor, and an elongated thermal fuse which is likewise wrapped around an external surface portion of the hose assembly such that successive spiral turns of the thermal fuse are effectively interposed between successive spiral turns of the heater circuit. The thermal fuse may be electrically connected in series with the heater circuit so as to effectively terminate electrical power to the heater circuit as a result of the melting of the thermal fuse, or alternatively, the thermal fuse may be electrically connected in series with the temperature sensor, so as to detect abnormal temperature levels at substantially any location throughout the length of the hose assembly.

Abstract: A thermal fuse integrated into an electrical circuit powering a heater element having a positive temperature coefficient includes at least one terminal in electrical connection with the heater element thereby connecting the heater element to a power source, and a solder jacket that mechanically retains the electrical connection between the terminal and heater element, wherein a biasing load is applied to the terminal when retained by the solder jacket, and wherein the terminal breaks connection with the heater element under the force of the bias when the solder jacket melts should the heater element overheat. By selecting the solder material forming the solder jacket according to its melt temperature, a temperature specific overheat protection for a heated fuel injector can be provided. Since the injector's metering circuit is separate from the thermal fuse circuit, the fuel injector remains operational even after the heater circuit is opened.

Abstract: The object is to provide a laser processing apparatus, a laser processing temperature measuring apparatus, a laser processing method, and a laser processing temperature measuring method which can highly accurately detect the processing temperature when carrying out processing such as welding with laser light. A laser processing apparatus 1A for processing members. DR, UR to be processed by irradiating the members with laser light LB comprises a laser (semiconductor laser unit 20A) for generating the laser light LB; optical means for converging the laser light LB generated by the laser onto processing areas DA, UA; and a filter 30, disposed between the members DR, UR to be processed and the optical means, for blocking a wavelength of fluorescence generated by the optical means upon pumping with the laser light LB; wherein light having the wavelength blocked by the filter 30 is used for measuring a temperature of the processing areas DA, UA.

Abstract: A control system suitable for use with a bathing unit system having a water receptacle is provided. The control system comprises a heating module, a power source and a controller in communication with the heating module and the power source. The power source includes an energy storage member for storing energy collected from a solar panel, and is operative for supplying power generated from solar energy to the heating module. The controller is operative for causing the power source to supply power to the heating module at least in part based on first information derived from a temperature of the water within the water receptacle and second information derived from a condition associated with the power source. The controller is further operative for selecting between a first power source and a second power source for supplying power to the heating module.

Abstract: A heating apparatus includes a plurality of heating means that heat a heated object, a temperature measuring means that measures temperatures of some of the plurality of heating means, a heated object information storing means that stores, in a coordinate manner, heated object identification names, target heating temperatures at the heating means, and sets of heating ratios respectively assigned to the heating means, a heating information storage means that defines a relationship between temperatures during heating of the heating means up to the target heating temperatures and heating intensities at the temperatures, a heated object identification name obtaining means that obtains one of the heated object identification names, a heated object information reading-out means that reads out one of the target heating temperatures and one of the sets of heating ratios respectively assigned to the plurality of heating means, corresponding to the heated object identification name from the heated object information st

Abstract: 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 with a power source and a heat-generating device for heating the heat-generating device. The above-mentioned heater circuit is connected with a thermo fuse, a resistor and a reactive trigger circuit. Another end of the reactive trigger circuit is connected with the microprocessor for advancedly detecting whether the microprocessor is in abnormal condition. Once the microprocessor is damaged, the power source, the thermo fuse and the resistor make a loop and the resistor is heated to ruin the thermo fuse for terminating heating. Also, when the microprocessor works normally, the heater circuit and a switch for controlling temperature on reactive trigger circuit are detected to determine whether to terminate the heater circuit.

Abstract: The invention relates to a device and a method for welding two polymer parts via fusion using a heater mat knitted from a resistive wire coated with an insulating varnish, the heater mat being given a final shape. The heater mat is resistive wire having a diameter ranging from 0.2 mm to 0.3 mm, and has approximately parallelepiped meshes, the dimensions of which range from 1.5×3 mm2 to 2.5×4.5 mm2.

Abstract: PTC electrical heating devices are disclosed which are suitable to vaporize air treatment chemicals from an impregnated slab, such as insect repellents. In one form an electrical contact to a PTC heater element is provided with a bowl-shaped contact head to reduce the risk of edges of the contact cracking the heater element. In other forms peg and recess structures interact with apertures on a heat transfer plate to facilitate assembly of the parts of the structure.

Abstract: An overheating protection system for a control unit includes an interrupter element, which, in its initial position defined with respect to a circuit board, electrically connects the opposite facing ends of at least one track on the circuit board, and an actuating element which is activated with the overheating of the transistor, and which on actuation against the interrupter element takes effect and releases it at least so far from the tract that the electrical connection is interrupted. A preassembled actuating unit for the interrupter element of the overheating protection is comprises an accommodation housing, in which an actuating element is accommodated and which can be brought into interaction with the interrupter element and which is held releasably by a one-piece latching element formed on the accommodation housing under pretension. An electrical heating device with a control unit protected against overheating is also provided.

Abstract: A device for remotely decoupling coupled objects with a fusible link underwater using a replaceable fusible link of appropriate electrical resistance, a method to supply a high-power charge of electricity across the fusible link, a mechanism held by the fusible link to hold and release a secondary link between the coupled objects and to add mechanical advantage to the strength of the fusible link, and a command-signal delivery system that enables remote activation of the device.

Abstract: The present invention discloses an all disassembleable electric-heating apparatus comprising a shell, a cover, a reservoir installed inside said shell, an electric heater installed inside said reservoir and immersed in the liquid contents of said reservoir in working mode, and control elements including a control box and thermo-elements; wherein, said thermo-elements include electrical elements, said electrical elements are peripherically electric-insulated and sealed, so as to be immersed in the liquid contents of said reservoir in working mode and be taken out for cleaning after use.

Abstract: A flexible body has a conductive resistance pathway which includes conductive resistance flexible strands of material connected in series between two supply bus flexible strands of material, and a temperature dependent variable resistance pathway with temperature dependent variable resistance flexible strands of material electrically connected in series by connection bus flexible strands of material.

Abstract: An electric heater apparatus for automobiles is disclosed. A sheathed heater (14a) constituting a heat generating member of a heater assembly (14) generates heat by power supplied from a main power supply for generating a DC high voltage through an inverter. A thermal fuse (15) has a temperature detecting element (15a) (low-melting alloy) adapted to fuse when a set temperature is reached. The temperature detecting element (15a) is connected to the power circuit of the sheathed heater (14a) through lead wires (15b, 15c). The thermal fuse (15) is arranged in such a position that the longitudinal direction of the temperature detecting element (15a) accommodated in the casing (17) is coincident with the longitudinal direction of the heater assembly 14, and mounted in surface-to-surface contact with the body (aluminum body (14c)) of the heater assembly (14). Also, the interior of the casing (17) is sealed with a material (such as cement or a silicon caulking material) higher in heat conductivity than air.

Abstract: A flexible body has a conductive resistance pathway which includes conductive resistance flexible strands of material connected in series between two supply bus flexible strands of material, and a temperature dependent variable resistance pathway with temperature dependent variable resistance flexible strands of material electrically connected in series by connection bus flexible strands of material.

Abstract: A fuse mechanism for a heating device according to the invention functions as a thermal fuse. A heater is located on a support. In spatial proximity and with heat conduction to the heater are provided solder contacts with electrical leads to the support. A metallic connection bridge is firmly soldered to the solder contacts and the position thereof with respect to said contacts is such that in the use state on softening the solder connection at the solder contacts the connection bridge is separated by gravity and drops off. In this way the electrical connection from the heater to a electrical supply is separated.

Abstract: The present invention in situ reconfigures connections within an electric circuit, such that a previously open circuit becomes a permanent in situ electrical pathway. A heat-activated electrical coupling comprises a heat-activated coupler and a heater. The heat-activated coupler comprises a preform of a material that changes a physical or electrical state in response to heat from the heater to bridge a gap between separate but adjacent ends of respective circuit traces. An in situ reconfigurable circuit comprises the heat-activated electrical coupling, a fusible link, a primary circuit and a secondary or back-up circuit. An in situ recoverable electrostatic discharge (ESD) circuit comprises the heat-activated electrical coupling, a primary ESD protection portion, and a secondary or back-up ESD protection portion. A method of in situ reconfiguring a circuit comprises creating the heat-activated electrical coupling and activating the electrical coupling with heat.

Abstract: An over-temperature safety device is provided. A slug of material fusible at a selected critical temperature is positioned on a heat conductive surface. A bolt is positioned through a hole in the slug. The bolt has a head which is smaller than the bolt hole. A plate overlays the heat conductive surface with the slug therebetween. The plate has a hole through which the bolt head may pass. The plate hole, bolt and slug hole are coaxial. A compression spring urges the plate and the conductive surface together with less pressure than required to cause the slug to flow at temperatures below the critical temperature. The bolt is connected to a switch by an extension spring urging the bolt to pass through the holes in the plate and slug. When the slug melts, the bolt passes through the holes in the plate and the slug and opens the switch.

Abstract: A soft and flexible heater utilizes electrically conductive threads or fibers as heating media. The conductive fibers are encapsulated by negative temperature coefficient (NTC) material, forming temperature sensing heating cables. One or more heating cables can be formed into heaters of various configurations including tapes, sleeves or sheets providing simultaneous heat radiation and local overheat protection. Such heaters may be connected in different combinations, in parallel or in series. The heater may contain continuous positive temperature coefficient (PTC) temperature sensors to precisely control the temperature in the heater. Such temperature sensors can be made of electrically conductive fibers, metal wires or fiber optical filaments. When required by the heater design, the electrically conductive threads/fibers may have a polymer base, which acts as a Thermal-Cut-Off (TCO) at predetermined temperatures. Electrically conductive fibers comprised of such polymer base can melt between 110° C.

Abstract: The invention relates to armoured heating elements. The invention specifically relates to a heating device (1) consisting of a tubular envelope, wherein a heating element (4) surrounded by insulation (3) is arranged, said heating element (4) is connected to an electric supply circuit by connecting (14) rods and pins (10,12) and said tubular envelope (2) is provided with two cylindrical sealing beads (16) arranged in the ends thereof, whereby at least one of the beads known as a specific bead (16) is in direct contact with the insulation (3) surrounding the heating element (4); The invention is characterized in that the specific bead (16) comprises an axially transversal recess (18), wherein a thermal fuse (20) is inserted and electrically and serially mounted with said heating element (4).

Abstract: A protective element contains a heat-generating member and a low melting metal member on a substrate. The low melting metal member is caused to blow out by the heat generated by the heat-generating member. The number of locations on the low melting metal member which are able to blow out is larger than the number of locations which are supposed to blow out so that the protective element is endowed with a “fail-safe” function.

Abstract: A protective device includes a heating element and a low-melting metal element on a substrate, the low-melting metal element being fused by the heat generated by the heating element, and in this device the heating element and the low-melting metal element are stacked so as not to allow an insulating layer to intervene therebetween, and as a result the protective device is miniaturized and the operating time reduced without lowering the rated current.

Abstract: A heater protective device of a cooling system includes a couple of thermostats and one thermal fuse. The thermostats are secured to opposing sides of one metal plate. When a temperature of each thermostat rises due to the heat conducted through the metal plate and substantially reaches 40 degrees Celsius or higher, an internal connection of the thermostat is turned off, i.e., is opened. When the temperature of the thermostat decreases substantially below 40 degrees Celsius, the internal contact of the thermostat is turned on, i.e., is closed. The metal plate is secured to a heat receiving bracket that is secured to a heater cover and that is heated upon receiving radiated heat from the electric heater. A thermal fuse extends through the metal plate in a thickness direction of the metal plate and is secured thereto.

Abstract: A heating assembly, for use as an electric blanket or personal heating pad, includes a flexible heating panel and an electric circuit for heating the panel. An electrical heating element is mounted directly on the panel and includes inner and outer coaxial coil conductors separated by an electrically insulating layer and surrounded by an outer electrically insulating layer. A two-core flexible electric cable connects the heating element to the power supply, and to an electric control switch for controlling operation of the heating element, a fuse being located in the circuit to be actuated in the event of a short circuit occurring between the conductors of the heating element, due to breakdown of the inner insulating layer. The electric circuit also includes a device for controlling the temperature of the heating element.

Abstract: In a heating device used for melting snow on a road, a roof or the like, or for room heating of in-door facilities, in order to heat a to-be-heated or heated object uniformly over its entire area and enable to utilize effectively a PTC heater, a heat diffusing plate 14 for diffusing heat generated from a heat generating body 16 is arranged on an upper face of the heat insulating member 12 and the heating body 16 is arranged in a recess portion 13 installed on its upper face. The heating body 16 is constituted by inserting a heat generating element 4 mounted with heat radiating plates 5 into a vessel 2 enclosed with a heat storing agent 3 of a latent heat absorbing type in a state in which the heat generating element is brought into contact with the heat storing agent 3.

Abstract: A system of interconnected heating conductors, suitable for preventing freezing of water lines in an aircraft for example, includes a plurality of heater units (1, 12, 14) electrically coupled together by respective extension cables (3) and electrical coupling elements (42). Each heater unit comprises one or more heating conductor bands, tapes or strips (2, 21, 22) connected to respective connection modules (5, 51, 52, 52', 53) at the ends thereof. The connection modules may connect together several heater bands within one heater unit, and may connect the terminal ends of the heater bands of one heater unit to the extension cables by which several respective heater units may be connected together. Each connection module includes a housing (6) enclosing an inner chamber (61) therein, and at least one electrical connector element (7) such as a crimpable connector fixed within the housing (6).

Abstract: A cigar lighter, especially for a motor vehicle, includes a lighter body, or power socket comprising a body sleeve, which carries insulating rings, a two-fingered clip, and power supply tongues, all of which are assembled to the base portion of the lighter body sleeve by a fastening member. The cigar lighter is equipped with a device for protection against overheating. The second power supply tongue is insulated from the base of the lighter body sleeve. The second power supply tongue is connected electrically to the base through the protective device, which is a safety fuse. The second insulating ring is so configured as to contain the fuse inside it. The fastening member fastens the fuse carrier to the base of the lighter body.

Abstract: A temperature sensitive protective device for a solar water heater comprising an electric heater (12) for heating water and an electrical circuit for controlling electrical power to said electric heater. A first switch (22) in the circuit controls electrical power to the electric heater and an actuator is moveable to an activated position for operating the first switch means (22) to discontinue electrical power to the electric heater. A fusible link (24) is attached to the actuator for preventing the actuator from operating, and a second switch is disposed in the said circuit for controlling electrical power to the fuisible link when actuated for breaking the fusible link to release the actuator. A safety thermostat senses the temperature of the water and actuates the second switch in response to a predetermined temperature of the water and a biasing operates the actuator upon the release of the actuator by the fusible link.

Abstract: A safety-assuring control device for an electric blanket which includes a PTC heater includes an integrated circuit microcontroller unit having first and second safety circuit inputs and an output connected to a control input of an electrically controlled heater switch. A neon tube is connected between the primary safety link return conductor of the heater and the first safety circuit input, to indicate whether there is a first type of fault in the PTC heater. A connection between the second safety circuit input and the secondary safety link return conductor of the PTC heater is provided which indicates whether there is a second type of fault in the heater. The microcontroller unit includes a preliminary fault detection circuit for supplying a limited power test signal in a test mode to the heater for a predetermined period of time prior to a full power operation of the heater.

Abstract: An injection molding heater system for heating molding resins or plastics includes a plurality of heaters for heating resin wherein each of the heaters is positioned adjacent a nozzle or manifold. The system also includes an electrical circuit which is connected with the heaters and carries electricity from a power source to each of the heaters in order to energize the heaters. A plurality of circuit breaking devices are incorporated in the circuit for discontinuing the flow of electricity through each of the electrical circuits for preventing circuit damage in case of overcurrent, surges or the like. At least one circuit breaker is positioned in each of the electrical circuits between the power source and each of the heaters.

Abstract: An assembly (5) has two or more plastic parts joined together. One of the plastic parts (20) has an electrical heating element (31) whose function is to soften a portion of the plastic when the heating element is electrically energized. Once the plastic is softened, the two parts can be separated and the assembly disassembled. When the two parts are joined together with snap-fit joints, the snap-fits have a heating element to soften a portion of the snap-fit (24) when the heating element is electrically energized, thereby allowing the housing to be opened and separated. If the two parts are ultrasonically welded together to form a housing, a heating element is located therein to soften the ultrasonically welded portion (44), thereby allowing the two halves of the housing to be separated. The heating element can be a nichrome or thin film resistor that is energized by a source (33) located within the housing, or by an power source external to the housing, or it may be inductively coupled to the power source.

Abstract: The invention relates to a steam generator for humidifying an airplane air conditioning system. The steam is generated in a container (21). A support (50) enables a translational movement of a tubular part (49) connectable to a duct of a humidifier along the main axis of the container (21) in order to connect it with the outlet opening (24) of the container (21). Inside container (21), there are at least two electrodes (31, 32, 33) that are partially immersed in water and which are energized under a constant voltage up to a certain level of current in electrodes (31, 32, 33). Also, container (21) includes a fuse 38 with one end connected to a first of the terminals, the other end of the fuse being of the connected to one of the electrodes (31, 32, 33). A regulating unit (60) measures and maintains the intensity that current passing through electrodes (31, 32, 33). At the time of the installation of a new container, the regulating unit (60) determines whether the fuse (38) is or is not conductive.

Abstract: The boiling water washing machine provides a safety control device for a heater. The safety control device comprises a metal bracket sealingly mounted on a tub. On the top of the bracket the heater is contactedly mounted. On the inner of the bracket the thermistor is installed for initially detecting the temperature of the heater, and the thermostat is installed for controlling the heater when the thermistor cannot operate properly. At the brim of the metal bracket a fuse assembly is mounted. The fuse cuts off the electrical supply when excessive heat is transmitted through the metal bracket.

Abstract: An air conditioner having a partition for partitioning the inside thereof into indoor and outdoor sections with an intake port. A damper is provided at the intake port so that an outdoor air introduction path of the outdoor section and an outdoor air discharge path are cut off when introducing outdoor air by opening the damper. Air the outdoor air introduction path is guided into the indoor section.

Abstract: A blower motor speed control resistor array in which the resistor elements contain an electrically conductive plastic material which melts to limit the blower motor current in the event of an extreme temperature condition. The conductive plastic is insert molded on a terminal array to form a self-supporting structure adapted to be disposed in an air duct. Each resistor of the array is defined by a number of legs of electrically conductive plastic extending between a pair of parallel headers, in the manner of a picket fence.

Abstract: The invention relates to an electro-welding element for interconnecting two pieces made of plastic, the electro-welding element being made of conductive plastic, either an intrinsically conductive plastic or an extrinsically conductive plastic. In a preferred embodiment, the electro-welding element includes an electro-welding portion constituted by two cylindrical sleeves and a thermoregulation portion constituted by a central portion interconnecting the two sleeves. An electro-welding coupling for interconnecting two tubes made of plastic may be formed by overmolding a plastic sleeve onto the electro-welding element, the sleeve being provided with power supply terminals.

Abstract: The invention relates to the welding of components made of heat-fusing plastic, using an electrical heating resistor arranged in the thickness of a connection component.According to the invention, the resistor is a thin electrically conductive layer advantageously formed on a supporting film made of heat-fusing plastic and capable of causing the tearing of the layer at a specific temperature corresponding to the welding temperature of the components.The invention is used particularly for the thermal welding of polyethylene pipes used in the gas industry.

Abstract: An electrical resistance heating element includes a pair of spaced apart electrical conductors, and a strip of resistive material disposed between the conductors and extending along their lengths. A strip of heat-sensitive, electrically conductive material is also disposed between the conductors and also extends along their lengths. The strips of resistive material and heat-sensitive, electrically conductive material together provide an electrical path between the conductors widthwise along their lengths. The heat-sensitive strip interrupts an electrical path between the conductors and widthwise through the resistive material strip only over portions of the resistive material strip which attain a predetermined temperature.

Abstract: A car-borne electric cigar lighter includes a receptacle having a spring contact for receiving the heater element of the lighter for energization. A pair of spaced electrially conductive connecting plates form part of the electrical circuit to the spring contact. A circuit breakable electrically conductive spacer including a heat resistant, form-retaining resilient plate of an electrically insulating rubber, e.g., silicone rubber, penetrated between opposite surfaces with a thermally fusible, electrically conductive portion made from a low melting point metal, e.g., tin foils, to be in contact with the two connecting plates on both sides of the spacer forms an electrical connection between the plates through the tin foils. In case of overheating, the tin foils are melted down to open the electric circuit to the spring contact without losing the mechanical integrity of the spacer to serve as an insulator between the connecting plates.