Abstract: A terminal for electrical resistive elements of molybdenum silicide or alloys of this material, which terminal is arranged to pass through a furnace wall or a furnace ceiling or corresponding insulated wall, where the terminal located at each end of the hot zone of the element has a diameter that is larger than the diameter of the element in the hot zone. The invention is characterised in that a terminal connector is connected to each terminal, in that the terminal connector is made from aluminium, in that the terminal connector has a length that fully or partially constitutes the length of the combined terminal length, where the combined terminal length is the length of the relevant terminal of the element and the terminal connector.

Abstract: A thin film resistor structure is disclosed. The resistor structure comprises a resistor film comprising a copper oxide layer and a plurality of metal islands thereon. The copper oxide layer has a top surface comprising a plurality of adjacent nodule-shaped recess regions, in which vacancies are formed between the nodule-shaped recess regions and are arranged in reticulate distribution. The plurality of metal islands is respectively distributed in the vacancies between the nodule-shaped recess regions. A method for fabricating the thin film resistor structure is also disclosed.

Abstract: A ceramic heater comprising a ceramic body, a heat generating resistor buried in the ceramic body, an electrode pad that is electrically connected to the heat generating resistor and is formed on the surface of the ceramic body and a lead member bonded onto the electrode pad.

Abstract: A heater strip for use as a heating element in an electric heater is made up of a profiled strip made of a flat metallic material forming a resistor section and of mounting elements extending over one common longitudinal side and they are manufactured as one piece with the resistor section for mounting the heater strip to a support. The strip has a zigzag-shaped structure. The mounting elements are provided only on the flat leg sections of the zigzag-shaped heater strip.

Abstract: An impedance network configuration in the form of a snake-like or ladder structure is provided. The ladder configuration enables the provision of tabs extending outwardly from the normal conducting path, the tabs providing a location for the provision of contact layers. Using such a configuration the contribution of the contact impedance can be minimized and also programming of the configuration may be effected.

Abstract: An improved mounting apparatus for the attachment of a filament heater between electric conduction plates of a space heater device comprises a first electric conduction plate, a second electric conduction plate, a plurality of filament heaters positioned between the electric conduction plates, a plurality of electric conduction rings positioned on opposite sides of each of the filament heaters, and a seat having a receiving trough for receiving the electric conduction plates and the filament heaters therein. Each of the electric conduction plates includes a suitable mounting hole therein. An elastic pressing piece extends around the mounting holes so as to exert a compressing force upon the respective electric conduction rings on the filament heaters. The seat includes suitable pillars that can receive screws so as to secure the electric conduction plates and the filament heaters within the seat.

Abstract: An electrical component has a terminal construction allowing it to be electrically and mechanically connected to an electrode. A terminal made of a metal material is mounted on an insulating substrate which has front and rear surfaces and is mounted on the front surface thereof with an electrode. The terminal includes a clamp section for clamping the substrate through front and rear surfaces thereof. The clamp section includes a first contact element contacted with the electrode and a second contact element contacted with the rear surface of the substrate. The first contact element is adhesively bonded to the electrode. Electrical connection between the first contact element and the electrode is carried out by direct contact therebetween. The second contact element of the clamp section is adhesively bonded to the rear surface of the substrate.

Abstract: A chip varistor formed of a single layer varistor element includes a pair of non-ohmic contact electrodes and a pair of ohmic contact electrodes. The varistor element is a rectangular shape having top and bottom surfaces, two opposite edges and two opposite ends. Each of the non-ohmic contact electrodes covers one of the opposite ends of the varistor element and extends over a majority portion of either one of the top or bottom surfaces. Each of the ohmic contact electrodes is arranged at the center of corresponding one of the top and bottom surfaces of the varistor element. The ohmic contact electrodes directly contact the surfaces of the varistor element to form a ohmic contact relative to the varistor element. Each of the pair of non-ohmic contact electrode is electrically connected to each of the pair of ohmic-contact electrodes while forming a non-ohmic contact with respect to the varistor element.

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: A glow plug for a diesel engine includes a U-shaped ceramic heater of SIALON supported by a hollow metallic holder. The heater has a U-shaped heating portion projecting from one end of the holder and is supported therein by a pair of parallel ceramic lead portions of a thicknesses greater than the heating portion. One lead portion is electrically connected to the interior of the holder and the other lead portion is electrically insulated from the holder and electrically connected to an external connecting terminal extending into the other end of the holder. The lead portions are spaced from each other to define a slit therebetween open to the interior of the holder. A sintered ceramic sheet of SIALON integrally seals the slit against entry of combustion gases into the interior of the holder.

Abstract: A ceramic heater has a heater element made of a mixture including MoSi.sub.2 and Si.sub.3 N.sub.4 powder as a main ingredient and silica (SiO.sub.2) powder as an additive, a heater support member made of an electrically insulating ceramic sintered body for supporting the heater element and an electric current supply means for supplying an electric current to the heater element. The composition of the mixture for the heater element is defined so as to satisfy the following formula: 0.035.ltoreq.B/A<0.35 where A is the amount of Si.sub.3 N.sub.4 expressed by mol percent of the total amount of the main ingredient of MoSi.sub.2 and Si.sub.3 N.sub.4 and B is the amount of SiO.sub.2 expressed by mol percent of the total amount of the main ingredient of MoSi.sub.2 and Si.sub.3 N.sub.4.

Abstract: Small portable electrical resistance heated radiant heating unit useful for insertion in tube bores to effect localized high temperature heating. Useful for the internal heating of tubes and tube/sleeve assemblies in steam generators, for brazing, stress relieving, and other applications. Has a machined mandrel of boron nitride and electrical resistance wire leads that have reduced electrical resistance for reduced heat generation by the leads. The leads preferably are braided, to permit the use of cramped connectors.

Abstract: A ceramic heater comprises a heat generator made of a conductive ceramic sintered body, a supporter made of an insulating ceramic sintered body for supporting the heat generator, and a metallic wire for supplying an electric current from an electrode to the heat generator. The heat generator is integrally covered with an unporous covering layer made of an insulating ceramic sintered body. The covering layer prevents the heat generator from being directly exposed to oil and water. The covering layer is made of, for example Si.sub.3 N.sub.4 or glass containing SiO.sub.2 as a main constituent into a thickness of not more than 1mm.

Abstract: A delivery system is provided for use in conjunction with the metalurgical furnace of the type having an elongated furnace chamber with an access door at one end for delivering a coffin containing parts into the interior of the furnace chamber. The delivery system comprises a plurality of rollers which are secured to the bottom of the furnace chamber so that axes of the rollers extend transversely with respect to the axis of the furnace chamber. In use, the rollers frictionally engage the bottom of the coffin and guide the coffin into the furnace chamber. Preferably, the coffin includes upwardly extending channels on its bottom, and which the rollers are positioned.

Abstract: Small portable electrical resistance heated radiant heating unit useful for insertion in tube bores to effect localized high temperature heating. Useful for the internal heating of tubes and tube/sleeve assemblies in steam generators, having bores as small as 0.75 cm. or less, for brazing, stress relieving, and other applications.

Abstract: A cylindrical core of a ceramic such as alumina (Al.sub.2 O.sub.3) has grooves in the form of a double lead thread. A coil of Nichrome V is placed in the grooves, starting in one lead of the thread and returning in the other. A split ring of a ceramic such as beryllia surrounds the core. The heater is enclosed in a housing of a metal such as Inconel 600. The entire cartridge is only one inch long and 3/16 inch diameter. It is used as a catalyst bed heater for a satellite thruster.

Abstract: A ceramic heating element is held in a metal housing to be mounted on an internal combustion engine, so that the heating element is operated as a glow plug for igniting an air-fuel mixture. The ceramic heating element is formed of an electrode section housed in the housing and a heat generating section extending out of the housing, whereby the heat generating section is exposed to the mixture in an engine cylinder. The electrode and heat generating sections are divided into two portions, respectively, and both forward ends of divided heat generating portions are connected with each other, so that electric current flows from one of the electrode portions through the divided heat generating portions to the other electrode portion.

Abstract: A rectangular wafer thermistor comprises a piece of ceramic thermistor material having electric contact material covering its opposite surfaces. A contact defining score mark with an open geometric shape other than a straight line extends across the thermistor through one layer of the contact material for separating the contact material on that surface into two contacts. The ends of the contact defining score mark intersect the opposite edges of the thermistor at different locations along the thermistor. The contact defining score marks may be V or U or otherwise shaped, and the intersections between the different sections of these score marks are preferably rounded, but may be sharp corners. The shape of the contact defining score mark prevents the thermistor from breaking at the contact defining score mark when the thermistor is broken off a large sheet of thermistor material.

Abstract: A ceramic heater-element to be incorporated into a plug to be pressed into a socket provided on a front inner car-body, thereby providing a cigarette-lighter, which comprises an annular shaped heater-portion having a radially extending gap thereby providing two opposing end-portions, and a pair of electrode-portions, each being extended substantially downwardly from each of the two end-portions while being in a parallel relationship with a center axis of the heater-portion, wherein respective cross-sectional dimensions through which the electric current flows are so arranged that the cross-sectional area of the heater-portion is relatively smaller than either of the cross-sectional areas of the electrode-portions.

Abstract: A terminal block for simplified wiring of an electrical immersion heater assembly by providing for either single phase or three phase wire-up in opposite faces of the block. The terminal block has an electrically insulating body of disc-like configuration with three recesses defined in a first face of the block, each recess adapted to receive a lead connecting strap having a pair of apertures. Each of the three recesses has two bores extending into the body, the apertures of the straps alignable with the bores, for receiving leads of three separate heating elements through the apertures and into the bores for three phase wiring in the first face. The opposite face has an X-shaped recess which encompasses only four of the six bores for single phase wiring of four leads of the heating elements with a pair of curved straps. The body is of conical frustrum shape for better sealing characteristics and includes two additional bores adapted for receiving thermowells.

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.