Abstract: A method of forming a flat conductor that includes aligning multiple strands of flat conductive tape adjacent to each other, and braiding the strands of flat conductive tape to each other by sequentially bending one of the strands of flat conductive tape over the other strands of flat conductive tape to create a braided flat conductive tape. Each end of the braided flat conductive tape is connected to an electrical assembly for carrying electrical current therethrough.

Abstract: An axial resistance sheathed heater is presented. The axial resistance sheathed heater includes a retaining sheath having a first end and a second end and a resistance wire completely disposed within the retaining sheath. The heater further includes a first conductor rod partially disposed within the retaining sheath and extending beyond the first end of the retaining sheath, the first conductor rod in direct electrical communication and direct mechanical communication with the resistance wire; and a second conductor rod partially disposed within said retaining sheath and extending beyond the second end of the retaining sheath, the second conductor rod in direct electrical communication and direct mechanical communication with the resistance wire. The resistance wire, the first conductor rod and the second conductor rod comprise a circuit achieving a power to voltage rating of about 5000:24.

Abstract: A stack of an interconnect-level dielectric material layer and a disposable dielectric material layer is patterned so that at least one recessed region is formed through the disposable dielectric material layer and in an upper portion of the interconnect-level dielectric material layer. A dielectric liner layer and a metallic liner layer is formed in the at least one recessed region. At least one photoresist is applied to fill the at least one recessed region and lithographically patterned to form via cavities and/or line cavities in the interconnect-level dielectric material layer. After removing the at least one photoresist, the at least one recessed region, the via cavities, and/or the line cavities are filled with at least one metallic material, which is subsequently planarized to form at least one planar resistor having a top surface that is coplanar with top surfaces of metal lines or metal vias.

Abstract: In a temperature sensor having a temperature sensitive element, a sheath pin connected to the temperature sensitive element, and a cover case. The cover case, filled with a filler, accommodates the temperature sensitive element and the sheath pin. A hardening temperature of the filler is not less than an actual usage environment of the temperature sensor. Another temperature sensor has a temperature sensitive element exposed at a high temperature of not less than 750° C., a thermistor element, a sheath pin, an anti-vibration filler, and a metal cover case fixed to an end part of the sheath pin. The metal cover case accommodates the sheath pin and the thermistor element. The filler is made of a porous insulation material having a pore ratio within a range of 30 to 70% and filled around the thermistor element in the metal cover case.

Abstract: A high-voltage resistor element which is superior to heat resistance, dielectric breakdown strength, vibration resistance and durability performance, and is advantageous to maintenance, inspection, adjustment, replacement and repair, is made up of: a cylindrical outer tube made of metal; a resistive heat-generating wire in a coiled shape tensionally extending between inner ends of electrode rods inserted respectively from both ends of the outer tube; an insulating material filing up a space between the resistive heat-generating wire with the electrode rods and the internal surface of the outer tube and fired; and insulating sleeves extractably encasing and anchored in the portions adjacent to the both ends of the outer tube penetratingly bridging between arrangement boards.

Abstract: A resistor 1 is used in high-fidelity amplifiers for audio equipment. The resistor 1 includes a cylindrical resistor body 2, a tubular sheath 3 into which the resistor body 2 is coaxially inserted, and a conductive film portion 31a formed on the inside surface 3a of the sheath 3. The conductive film portion 31a faces to a resistance film 22 covering the surface of the resistor body 2 with an annular space 6. An insulating slit 32 is formed at a central point along the resistor axis 1a, separating the conductive film 31 into left and right parts that are electrically isolated from each other. The sheath covering the resistor body 2 prevents distortion of signals in the resistance film 22 caused by extraneous electrostatic induction charges.

Abstract: The flat resistor comprises a stack of flat components including a first metal plate having assembly tabs bent, a first outer electrical insulator having alignment slots for receiving the tabs, a first sheet metal resistance element having slots for receiving the tabs with a clearance fit, a first inner electrical insulator having alignment slots for receiving the tabs, a metal midplate having oversize slots for receiving the tabs with a clearance fit, a second thin inner insulator having alignment slots for receiving the tabs, a second sheet metal resistance element having clearance slots for receiving the tabs, a second thin outer insulator having alignment slots for receiving the tabs, and a second metal outer plate having alignment slots for receiving the tabs, which are bent into engagement with the second plate for compressing the stack. The resistance elements have alignment tabs extending through alignment slots in the corresponding outer insulators and securely bent behind the insulators.

Abstract: The power resistor has a metal housing and heatsink, the bottom wall of which is planar and has a bolt hole therethrough for tight securing of the resistor to a chassis. A planar film-type power resistor is mounted in the housing and encapsulated therein, being held close to the bottom wall of the housing. Heat from the film-type resistor passes through the bottom wall into the chassis, the result being that the power rating of the resistor is high. The metal housing is die-cast of a zinc alloy, at extremely low cost yet with substantially the same heat-transmission characteristic as that of conventional die-castable aluminum alloys.

Abstract: A sheathed heater wherein before the sheathed heater is assembled, an oxide film is formed on the inner peripheral surface of a metal pipe, and/or the outer surfaces of an internal heater and lead pins thereof which are inserted into the metal pipe by heating them in the presence of oxygen or by applying chemicals thereto, and a heat resistent insulation material member is filled in a space formed between the metal pipe and the internal heater. The color of the oxide film thus formed is light brown, brown or black.

Abstract: A heater assembly for heating a container of corrosive fluid includes a housing adapted to be located in a container of fluid to be heated, a sealed chamber located in the housing, a heater located in the chamber, an electrically conductive sleeve assembly secured to the housing, and a flexible conduit extending from the sleeve assembly and providing a passageway for conductors providing a source of power to the heater assembly. The flexible conduit includes an electrical conductor connected to ground which is located in the sleeve assembly and the sleeve assembly is swaged to compress the sleeve assembly into the electrical conductor to ground to the electrically conductive housing via the sleeve assembly.

Abstract: An electric cartridge heater for use as an immersion heater in a steam table tank has a tubular elongate stainless steel sheath with a curved inner surface attached to a riser tube adapted to be connected to a wall of the tank and contains an electric heater element. A copper heat transfer member having an enlarged, curved surface complementary to the inner surface of the sheath is urged into close, intimate thermal contact therewith and transfers heat from the sheath to a bimetal thermostat for turning off the heater element in response to a rise in temperature of the sheath above a predetermined level.

Abstract: A resistance temperature detector measures the temperature of fluid flowing through a pipe at a given point in the pipe. In the temperature detector, normal and backup temperature sensing resistance elements are secured with inorganic adhesive onto an inner wall surface of a thin-walled tubular sheath having its tip end closed. These temperature sensing resistance elements are disposed in spaced parallel relationship and are respectively connected to insulated lead wires separately disposed within the resistance temperature detector. The resistance temperature detector also includes a sheath cable assembly having sheathed cables, each of which is electrically connected to a respective one of the insulated lead wires and secured to the other end of the tubular sheath. Thereby a sealed vacant space is defined within the temperature sensing assembly.

Abstract: An electrical heating element module particularly useful for heating the teeth of a hair comb or pick includes a pair of parallel, side-by-side spaced elongated central conductors having wound thereon a fibrous inorganic electrical insulation material, such as glass yarn, with the opposite ends of each central conductor exposed. An electrical resistance heater wire is wound over the glass insulation yarn on one central conductor and then over the yarn of the other central conductor and making contact with a corresponding end of each central conductor thereby providing effectively one electrical resistance heater. The central conductors are vertically supported by a flat insulator having a pair of sockets provided with spring contacts for establishing electrical connection to the remaining exposed ends of the central conductors.

Abstract: An improved copper sheathed heating element for installation in appliances, such as electric kettles, includes a minor amount of a silicone water-proofing agent admixed with magnesium oxide filler agent prior to the element being annealed. Annealing of the element is carried out at a reduced annealing temperature over an extended duration in order to limit thermal degradation of the additive during the annealing process. The resulting element achieves sufficient ductility for purposes of formation as a kettle heating element, while the insulation value of the element over an extended shelf life is maintained without significant degradation. Preferably, the silicone agent comprises polydimethylsiloxane and is present in the range 0.1 to 0.15 percent by weight.

Abstract: A brushless dynamoelectric machine with a molded insulating control wheel having a rim on whose inner surface the rectifiers and other components of the starting control circuitry are directly mounted. Proximate the central hub of the control wheel is mounted a resistor wheel of metal having axial apertures in which are located cartridge heater-type resistors that are interconnected to provide the starting resistor of the control circuitry. The resistor wheel has external fins that aid in dissipating heat from the resistors and also blow air onto the components mounted on the wheel rim.

Abstract: A sheathed heater comprising a metallic sheath, such as a stainless steel sheath, an electric heating element disposed within the sheath so that an electric current can be supplied thereto, and a filling material filled in the sheath for insulating the heating element from the sheath and the coils of the heating element from each other. Aluminum nitride powder is used as the filling material to prevent oxidation of the heating element by the oxygen discharged from the filling material.

Abstract: This invention relates to a sheathed resistance heater which comprises a metal pipe (3), a heating wire (2) received in the metal pipe, and an electrically insulating powder (4) filled in the pipe and also to a method for fabricating same. The electrically insulating powder (4) contains 0.1-10 wt % of the specific type of an oxide by which the heater has a prolonged life because the oxide serves to suppress the metallic component of the heating wire (2) from evaporating, and its insulation resistance under self-heating conditions can be prevented from lowering. The heater has wide utility in both domestic and industrial fields.

Abstract: This invention relates to a sheathed resistance heater which comprises a heating wire (2) received in a metallic pipe 3 and electrically insulating powder (4) packed in the pipe. A metallic powder of the specific type is added to the electrically insulating powder (4), by which the heating wire (2) has a prolonged life by suppressing metal components in the wire from evaporating, the heater being widely applicable for domestic and industrial purposes.

Abstract: An electric heater for heating oil contained in the sump well of a compressor includes a thermally conductive shell having first and second opposed inner surfaces. A ceramic core having a D-shaped cross-section throughout is positioned in the shell and is provided with longitudinal channels which are disposed substantially the same distance from the outer curved surface of core. An electric resistance heating element is disposed in the channels and is energizable by a source of power for developing heat under the control of a thermostat disposed in the shell. A resilient pad of ceramic fiberglass material having low thermal conductivity is disposed between the flat surface of the core and the thermostat and urges the curved surface of the core and the thermostat into contact with the opposed inner surfaces of the shell while substantially blocking heat transfer therethrough from the heating element to the thermostat.

Abstract: An elongate, electric resistance heater having a tubular case, a plug in and spaced from one end of the case and elongate, flexible jacketed power lines extending through the plug and axially outward from said end of the case, an elongate, tubular, flexible braided metal sheath about the lines and coupling means coupling said end of the case and the end portion of the sheath adjacent thereto, said coupling means including elongate concentric inner and outer tube parts arranged with said end portion of the sheath held tight therebetween, a radially outwardly projecting flange on one of said parts arranged within said end portion of the case adjacent said plugs and retaining means at said end of the case axially outward of the flange and holding the flange and its related parts and sheath against axial outward displacement in the case and relative to the lines.

Abstract: An electrical heat generating system of the skin effect current type having a two part elongate hollow element of ferromagnetic material enclosing an insulated energizing conductor. One part of the hollow element comprises an open face channel having two elongated, coextensive, spaced longitudinal edges and the other part covers the open face of the channel. When the conductor is energized by an alternating current, the magnetic field generated thereby is confined within the interior of the hollow element to produce heat without any current passing through and along the outer peripheral surfaces thereof.

Abstract: A heater comprising a metallic tubular sheath in which an elongate electrical center conductor is coaxially disposed therewithin. A fibrous, inorganic electrical insulation material is wrapped around the center conductor and an electrical resistance heating element surrounds the enwrapped center conductor, the heating element being coaxial with the center conductor and electrically connected thereto with the heating element and the conductor being adapted to be connected to a source of electrical power to energize the heating element. Other electrical insulation material is disposed between the heating element and the sheath to electrically insulate the heating element from the sheath and to provide a conductive heat transfer path between the heating element and the sheath. A method of manufacturing a heater is also disclosed.

Abstract: A temperature measuring probe utilizing an RTD element and an improved mode of assembling the element in a reliable manner which is proof against shock and vibration. Specifically, the invention has its most important applications in connection with miniaturized RTD's.

Abstract: An electric heating element, particularly of the cartridge type, comprising two elongated dielectric cores disposed within a metallic sheath. Each core has a plurality of longitudinally extending openings therein and more particularly one core has three longitudinal openings whereas the other has two openings. A resistance wire coil is wound on each of the cores, each coil having longitudinally spaced terminals. Three metal pins fit into predetermined core openings; one of the terminals of each resistance coil is electrically connected to one pin, the opposite terminal of one resistance coil is electrically connected to a second pin; and the opposite terminal of the other resistance coil is electrically connected to the third pin; whereby the one pin serves as a common electrical connection for both resistance coils, and the second and third pins serve as separate electrical connections to the respective resistance coils, whereby separate circuits may be established within the heating element.

Abstract: A temperature controlled electric heater for severing a web of vinyl film which includes a plastic coated metallic sheath having internal heater elements arranged in a ceramic core and a thermal resistance element nested in the core and in surface contact with the sheath for sensing the temperature of the heater; and means for securing the heater rigid and aligned with a web of vinyl film, said web being held under tension, and the heater being adapted to heat sever the film on contact with the web when the web is drawn over the heater.

Abstract: A mineral insulated heating cable and a method of making same wherein the cable has the characteristic that for a given supply voltage the heat generated per unit length of the cable is substantially unaffected by the total length of the cable. The mineral insulated heating cable comprises at least two metallic conductors, a metallic protective sheath, a body of compacted mineral insulating material filling the sheath and spacing the conductors from one another and embedded in the compacted mineral insulating material and contacting each of the two said conductors throughout their lengths, at least one resistance element in the form of a thin layer consisting predominantly of resistive material.

Abstract: Low-level "trickle" electric heater means in diverse forms prevents hygroscopic moisture accumulation adjacent relatively open or exposed ends of refractory-encased conventional electrical heating elements, thereby to prevent excessive leakage current through refractory otherwise potentially conductive with moisture buildup which may present a hazard at such time as the element is initially turned on.