Abstract: A miniature variable resistor assembly, preferably for use in a hearing aid, includes an insulating base having a terminal element molded within the base. One end portion of the terminal element extends outwardly from the insulating base and another portion of the terminal element is configured in a loop extending from the base. The loop has two spaced-apart portions. A plate of insulating material includes a resistance element and an aperture adjacent the resistance element with the loop extending through the aperture and each spaced-apart portion being distorted against the wall of the aperture and into conductive engagement with the resistance element.

Abstract: An improved electric resistance heater assembly for soldering tools, glue guns, hair dryers, heat pencils, paint removers, etc., includes, as the core of the assembly, an open-ended tube of a ceramic material having good electrical insulation properties with good thermal conductivity, low heat capacity and a high softening temperature. A conduit extends lengthwise through the wall of the tube from end to end thereof and first and second spring-tempered split metallic compression bands of smaller diameter than the tube are placed at each end of the tube and retained thereon by compressive stress. A plurality of turns of resistance wire are wound about the outer periphery of the tube between the bands with each end of the wire welded to a respective one of the bands. An first electric lead is welded to the first band. A second electric lead is welded to the second band and extends lengthwise through the conduit and exits the conduit near the first band.

Abstract: A resistor having a positive temperature coefficient in which a plate-shaped resistive element 1 is incorporated in a tubular envelope 2 between two electrical conductors 3, 4 which are in contact with the resistive element and which project from opposite ends 5, 6 of the envelope. The end face of at least one of the conductors 3 present inside the envelope has raised portions 10 against which the major surface of the plate-shaped resistive element facing said conductor 3 bears so as to obtain a poor thermal conductivity.

Abstract: A potentiometer comprising a casing having a short height relative to its diameter and constituting a receptacle for a resistor element and a sliding contact for contact with the latter, the resistor element being supported on the bottom of the casing and the sliding contact being arranged in permanent mechanical and electric contact therewith, being of annular and laminar shape and having a diameter substantially equal to that of the resistor, the shape of which constitutes an incomplete circular annulus having a zone of discontinuity exhibiting a small angle, corresponding to a projection formed on the bottom of the casing and serving as a travel-limiting stop in either direction in order to limit the rotational travel of the axial actuating element, the manipulation of which produces the rotation of the sliding contact on the resistor element.

Abstract: An electrical resistor is described which is comprised of a resistor core having at least one electrically conductive end cap mounted thereon. The end cap is in electrical contact with the butt end portion of the core and electrically insulated from the side, or periphery, portion of the core member. The end cap has an outward-extending radial portion thereon, positioned contiguous to the junction between the core and the cap.The present electrical resistors are produced by forming a resistive core member of a conductor in a dielectric matrix material and an end cap, having an internal contact surface and a receiving portion. The receiving portion is larger than the outside diameter of the core. The end cap has an outward-extending radial position adjacent the receiving portion. The end cap is mounted on the core to place the butt end portion of the core in electrical contact with the internal contact surface of the end cap, but otherwise spacedly within the end cap.

Abstract: An electrical resistor is described which is comprised of a resistor core having at least one electrically conductive end cap mounted thereon. The end cap is in electrical contact with the butt end portion of the core and electrically insulated from the side, or periphery, portion of the core member. The end cap has an outward-extending radial portion thereon, positioned contiguous to the junction between the core and the cap.The present electrical resistors are produced by forming a resistive core member of a conductor in a dielectric matrix material and an end cap, having an internal contact surface and a receiving portion. The receiving portion is larger than the outside diameter of the core. The end cap has an outward-extending radial position adjacent the receiving portion. The end cap is mounted on the core to place the butt end portion of the core in electrical contact with the internal contact surface of the end cap, but otherwise spacedly within the end cap.

Abstract: A cylindrical spacer type resistor device is connected to a metal fixing plate or a print circuit plate by its electrodes without lead wires only by fixing the resistor device. The operation for connecting the lead wires can be eliminated. When the resistor device is used as a disconnection detecting resistor of a rotor in a generator for a car charger, the resistor device can be easily fixed in a narrow space.

Abstract: An electrical contactor is provided which has particular although not exclusive utility in forming an electrical connection with a tungsten terminal pin such as is used in vacuum or gas-filled envelope enclosed high voltage relays; the contactor is in the form of a coil of resilient electrically-conductive material which grips the terminal pin in tight engagement therewith, and it serves as a solder tab for an electric wire to be connected to the terminal pin.

Abstract: A Hybrid Integrated Circuit package (11) typically includes a circuit substrate or article (12) on which are formed thin film components (17, 18, 19) of a circuit (22) and to which is bonded at least one semiconductor chip (21). Prior to bonding the chip (21) to the article (12) the circuit (22) undergoes various tests and adjustment operations. An electric element, preferably a resistance element (36), is formed on the article (12). The element (36) is functionally independent of the circuit (22) on the article (12). A first, initial value of the element (36) marks the article (12) as belonging to a first group of articles having first circuit characteristics. The initial value of the element (36) is selectively altered to a second value upon a determination that the article (12) has circuit characteristics other than those of the first group. In the described preferred embodiment the first group is a group of electrically acceptable articles (12), while other characteristics are those of defective articles.

Abstract: An electrical resistor comprising an elongated resistor body having a resistance wire winding extending between its ends and terminals at each end contact the resistance winding and each comprise a strip of given width having a first end portion extending about and secured with an end of the body, and a second end portion which extends in a direction transverse to the axis of the body and has a tip for being received through an opening in a printed circuit board. Each strip has an intermediate neck portion of reduced width which is positioned proximate to the resistor body and is twisted so that the second portion extends in a plane which is perpendicular to the axis of the body and in the same direction with and spaced from that of the other terminal allowing adjustment of the distance between their tips. The second end portions each have a shoulder proximate to its tip which is seated on the surface of a circuit board, fixing the position of the resistor and stabilizing its mounting thereon.

Abstract: An electrical resistor comprises a tube of resistive material having a closed end. An electrical connection is made to the open end of the cylinder, and a further connection comprises a conductor passing through the open end of the cylinder and connected to the closed end. A pair of voltage-measuring connections are made to the outer surface of the cylinder.

Abstract: A film type resistor especially suitable for use on planar electronic circuit substrates. The resistor is capable of being adjusted or trimmed to provide resistance values over a substantially wide range. The resistor can also be trimmed while actively functioning in a circuit including one or more other components, so as to provide a desired operating parameter for the circuit.

Abstract: A copper sleeve is employed to join a molybdenum disilicide heating rod with a conductor by a brazing process including fluxing the interior of the sleeve, positioning the sleeve partially over one end of the heating rod and heating the junction of the sleeve and rod in a nonoxidizing flame while applying a brazing alloy to the interior of the sleeve. The conductor is then crimped to the opposite end of the sleeve for providing an electrical and mechanical connection of the conductor to the heating rod.

Abstract: An electric resistance heating element of the hairpin type is provided by a molybdenum disilicide resistance wire loop transversely connected to molybdenum disilicide terminals. The resistance wire is sandwiched between the ends of two pieces of terminal wire and the ends of these pieces are butt welded together on the resistance wire, to form each terminal.

Abstract: This disclosure depicts structure and method for terminating an electrical resistor for a television CRT which could be used for arc suppression, voltage division or the like. The structure is disclosed in a preferred form as comprising a cylindrical rod of predetermined length, diameter and resistance. On at least one end of the rod, an electrically conductive coil spring is constricted in firm electrical and mechanical connection with said rod. At least a number of the turns of the spring are mechanically joined to prevent the spring from being torsionally stressed open so as to release the rod. Also disclosed is a method of making an electrical-mechanical termination.

Abstract: High-use-temperature electrical contacts for carbon-containing glasses which include a soft, glass-adherent metal layer in contact with the carbon phase in the glass and a compression electrode positioned over the metal layer which maintains compressive stress between the layer and the glass at temperatures up to and including the contact use temperature are described. Electrical circuit elements comprising one or more of such contacts offer stable electrical performance after repeated cycling to high temperatures.

Abstract: A heating tube adapted to electrically heat a fluid carried therethrough includes an inner tubular layer of polytetrafluoroethylene, a second tubular layer surrounding the inner layer and being formed of a homogeneous mixture of polytetrafluoroethylene and electrically conductive carbon, and a third layer surrounding the second layer and being formed of polytetrafluoroethylene. The three layers are coextruded together. The third layer is cut away at at least two circumferential points and the exposed second layer is there provided with a sintered coating for finely divided silver and finely divided polytetrafluoroethylene. The sintered coating is then wrapped with a silicone resin tape containing dispersed silver particles and a metal ring is then fitted over the silicone resin tape thereby forming an electrical terminal for the heating tube.

Abstract: Stamped and formed connecting device for splicing a small diameter lead wire to a larger diameter resistor core comprises a U-shaped connecting member having a web and sidewalls. The web has a semicylindrical central depression for the lead wire and has arcuate portions on each side of the depression which conform to the resistor core. The sidewalls are reversely folded at their outer ends to provide inner and outer layers. The ends of the inner layers are located adjacent to the depression. In use, the lead wire is located in the depression, the resistor core is positioned between the sidewalls, and the sidewalls are crimped onto the resistor. The ends of the inner layers move relatively towards, and against, the lead wire during crimping and establish contact with the lead wire. Contact with the resistor core is established by the inner surfaces of the inner layers of the sidewalls.

Abstract: An electric air heating appliance includes a housing defining an air flow path in which is positioned a resistance heater assembly which includes a plurality of air vanes for reducing air swirling. The heater assembly includes a semi-rigid assembly of mica plates in a cruciform arrangement and stiffened by use of a corrugated resistance heating element helically wound about the plates. An improved terminal means provides a tap intermediate the ends of the helical heating element. Additional terminals means are provided for connecting the ends of the heating element to a power source. The terminal means, which are in the form of metallic strips defining extending leg segments, cooperate with an impeller fan tube surrounding an air impeller in the housing to support and captivate the heater assembly in the housing.

Abstract: An electrical resistor and method of making same comprising an elongated resistor element having end sections and a resistance material extending therebetween, and a connecting part which is pressed onto at least one end section of the resistor for being bonded with the resistor element, the connecting part comprising a terminal lug having a first end section extending along and contacting an end of the resistor element and a second terminal end, and a cap received over and securing together the first end section of the terminal lug and its contacted end of the resistor element.

Abstract: A resistor, which can be of either the fixed or variable type, having a metal base covered by an insulating coating over all but an exposed area of the metal. A film type resistive compound or a wire winding covers the insulating coating but overruns it in the exposed area of the metal base and is bonded to the metal base. A suitable conventional terminal member is in conductive relation to the resistive compound covering at a point remote from the exposed area of the base so that the base, itself, may function as one terminal for the resistor.

Abstract: A heating device having a sinuous, expanded metal heating element of high intensity and quick response mounted upon chemically inert non-woven alumina-silica filler refractory material. The heating element is fabricated of metal sheeting by slitting and expanding it to a selected shape, mesh size, strand width and gauge to provide uniform distribution of radiant energy over the entire face area of the heating element at elevated temperatures in which the watt density and heating element area are not limited by available voltage and temperature.

Abstract: A standard solid electrolyte capacitor body having an outer surface of graphite and an anode lead has a novel cathode lead structure. A "c" shaped thin strip portion of the cathode lead is formed about the body and has a solder connection made therebetween. A wire-lead portion of the cathode lead extends away from the body in a parallel direction to that of the anode lead. The cup or "c" shaped portion of the cathode lead makes possible the easy registration of lead to body prior to soldering, even when tiny bodies are employed, which is especially effective during the large batch manufacturing steps in the mass production of capacitors.

Abstract: A resistor end termination consisting of aluminum or aluminum alloy, deposited on a resistor core, for providing secure and reliable electrical and mechanical connection between the resistor element and the cap and lead assembly of an electrical resistor.

Abstract: An electrical resistance element with electrode portions comprising a thin resistance wire of a heat resistant material, such as molybdenum disilicide, MoSi.sub.2, which resistance wire has at least one end electrode of aluminium, having a much greater cross-sectional area than that of the resistance wire, wherein the end portion of the resistance wire is fused into the end portion of the respective electrode portion.Also disclosed is a method of connecting an electrode portion to one end of the resistance wire in an electrical resistance element by placing the end portion of the electrode within a surrounding sleeve, heating the sleeve with the electrode end therein to cause the outermost end portion of the electrode end to form a melt, introducing the resistance wire end into the melt and permitting the melt to solidify and finally removing the electrode and resistance wire connected thereto from the sleeve.

Abstract: A method of making electrical resistors, in particular N.T.C. resistors for high temperature applications. The body of resistance material is provided with electrodes; and the ends of the leads are clamped against the electrodes in a case consisting of ceramic material which shrinks during sintering.

Abstract: ZrO.sub.2 -base heating elements have been of interest for use in oxidizing atmospheres above 1600.degree. C for a great many years, i.e. since it was shown that ZrO.sub.2 could be used as a resistance heater. Many groups have used, with limited success, ZrO.sub.2 -base elements for laboratory use, but to date no company has produced an element satisfactory for production and industrial use.I have developed a ZrO.sub.2 -base element which shows adequate usefulness to be produced in quantity and used in industry for satisfactory lifetimes relative to the other elements used at high temperatures.

Abstract: A sleeve of in-situ-solidified-from-melt material, such as a lead glass or the like, surrounds an end segment of a refractory resistance element extending from a junction between a metal supporting member and the end of the element. The solidified-from-melt material is formed not to adversely react with the refractory element and has a coefficient of linear expansion within the range from about 0.5 to 1.5 times the coefficient of linear expansion of the refractory material.

Abstract: The end of an elongated resistance element, such as a molybdenum disilicide rod, is joined to a metal member which provides both electrical connection and mechanical support.