Abstract: An electric heater for gaseous media with at least one support plate and at least one helix of corrugated, electric resistance heating wire wound continuously around the support plate and whose turns are held by means of heating wire bend-offs on the longitudinal edges of the support plate is characterized in that the heating wire is positioned in such a way that it only contacts longitudinal narrow sides and/or edges of the longitudinal narrow sides of the support plate, the bending angle being much larger than 40°. This significantly reduces the risk of thermal damage to the heating wire, particularly in the vicinity of the plate edges. As a result of the largely naturally stable design of the heating wire, the heater according to the invention requires no spacers between the support plates and is therefore particularly simple and inexpensive to manufacture.

Abstract: An electrothermal rack of a hair dryer includes a main body including a plurality of support wings each having a mediate portion formed with a positioning section formed with a plurality of inner insertion recesses. Each of the support wings has an outer side formed with a protruding plate formed with a plurality of outer insertion recesses. Each of the support wings is formed with a slideway between the positioning section and the protruding plate. Thus, the electrothermal body forms a multi-loop inner layer and a multi-loop outer layer around the support wings to increase the heating area of the electrothermal rack, thereby enhancing the heating efficiency of the hair dryer.

Abstract: A flame reaction member for a gas appliance has a flame reaction material carrier having a coiled or looped flame reaction material holding portion and flame reaction material carried on the flame reaction material holding portion. When manufacturing such a flame reaction member, a powder composition of the flame reaction material is molded into a body of a predetermined shape. The molded body is heated with the molded body held adjacent to the flame reaction material holding portion and is fused to the flame reaction material holding portion. The flame reaction material holding portion of the flame reaction material carrier is formed of flat wire material.

Abstract: The invention is in the field of electrical resistance heaters, especially heaters for tubes, pipes, or flexible hose. More particularly, the invention is directed to an electrical heater formed as a strip that is permanently set in the shape of a helix. According to an aspect of the invention, an electrical heater is provided comprising a flexible electrical insulation strip bounded by a first longitudinal edge and a second longitudinal edge, wherein the flexible electrical insulation strip is permanently set as a helix such that the first longitudinal edge is adjacent to the second longitudinal edge; and, a flexible electrical heating element encapsulated within the electrical insulation strip.

Abstract: A magnetic variable resistor has an elongated band of electrically resistive magnetic material, with the side edges tapered to a sharp point so that the skin effect causes current to migrate to the edges to create greater resistance. A layer of insulating material can cover the band as it is coiled. Leads are secured to opposite ends of the band. An alternate form of the invention embeds the coiled band in a magnetic insulating material. Surface mount leads are flush with at least one surface of the insulating material.

Abstract: An electric glow element has a heating-conductor coiled band inside of a glow-coil dish, with a mechanically strong clamped connection between the coiled band and the glow-coil dish. The connection has good electrical conductivity, and is formed by a first bead in the glow-coil dish base wall and a side wall of the glow-coil dish which is concavely curved towards the inside of the dish. A second bead is formed outside of the first bead, and serves to clamp a band end of the heating-conductor coiled band firmly, fixing the heating-conductor coiled band end between the base wall and the side wall. In a second embodiment, a single bead connects the base wall and the curved side wall. The single bead extends below the plane of the base wall, and receives the second band end. The second band end extends out of the coil plane of the coil, and the glow coil is disposed in the interior of the glow coil dish and is oriented so as to have its coil plane generally parallel to the base wall.

Abstract: An electric radiant heater (11) for heating a glass ceramic cooking surface (12) contains a dish-shaped insulator (14), to whose inner bottom surface (18) are fixed heater coils (20). The heater coils have an oval cross-section and are pressed by their narrow sides into surface (18) and fixed. The fixing pressing in takes place during the moulding of the moist insulator (14), made from fibrous material and by means of a male mould receiving the heater coils in slots.

Abstract: A resistance heater for performing heat treatment of the braze-affected area of a metallic sleeve attached by brazing within and to a metallic tube, comprises a metal tube (10) of which a portion (16) is formed with a spiral groove (11) which penetrates the wall thickness of the tube (10) and thereby defines a heating coil. The radial thickness of the convolutions of the coil varies lengthwise of the coil so that, when energized with electrical current, the coil develops a temperature profile which is determined by the variation in radial thickness. The temperature profile may be selected according to the needs of the brazed joint to be heat treated.

Abstract: A discharge resistor adapted to be mounted on a rotatable shaft of a dynamo-electric device comprises a pair of spirally wound, insulated resistor elements and means for supporting these elements approximately coaxially with the shaft. Each of the resistor elements is spirally wound in a flatwise manner with a bore having an effective diameter greater than that of the shaft, and insulation layers are provided between adjacent turns thereof. The resistor elements are arranged and connected electrically in series such that the inductive impedance appearing across the respective resistor elements effectively cancel each other.

Abstract: Resistance heating coils, flattened longitudinally along two sides to have generally oval cross-sections, are embedded in situ in a lightweight ceramic fiber insulating body adjacent to and extending along beneath the surface of the insulating body. Electrical terminal elements extend from the heating coils through the insulating body, and axial movement of the leads is prevented by anchoring members welded thereto. In one embodiment, the coils are embedded in an insulating body having a thickness no greater than about twice the depth of the heating coils. The resulting compact heating unit is sufficiently thin to be mounted as a retrofit item on the interior walls of an existing furnace.

Abstract: The present invention relates to a heater, primarily for pressure furnaces for extremely high temperatures for isostatic compression. The resistance elements of the heater are arranged between two metal rings at different levels which are supported by conductors. The resistance elements comprise two groups of wires arranged in a righthand and a lefthand spiral, respectively. The wires are joined together at the intersection points by means of lashing.

Abstract: An electric air heating element is designed for positioning in the cylindrical or conical outlet tube of a hair dryer. It consists of a star-shaped coil carrier in the shape of four fins extending radially from a common center line in the axis of the outlet tube towards the tube walls. The fin edges are serrated by adjacent rectangular slots, the slots on each edge penetrating alternately to a shallow and to a greater depth, and a ribbon-shaped resister laid into these slots is helically wound around the coil carrier. In this way successive windings lie in different planes and air turbulence around the heating coil is thereby increased, improving the heat transfer between the resistor windings and the throughflowing air.

Abstract: An electric igniting element as used in automobile cigar lighters, jet engine igniters and like devices, comprising a spirally wound tight coil made of metal heater ribbon which is transversely formed to have a cross-sectional configuration roughly similar to a wide-spread letter "V" but with a flattened bottom portion and two beaded edge surfaces along one side, which greatly facilitate the coil winding process, effect a greater uniformity, extend the range of coil stock that can be handled while at the same time resulting in a nesting and interlocking of the convolutions that not only provide a mutual support of the same but also produce a small coil having a high metal density.

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: A heating element assembly for a ceramic top electric range is disclosed. The assembly includes a base pod comprising a block of insulating material having a recess in one surface. A grooved path is formed in the recess in the form of a spiral and a thin, flat strip of apertured, foil-like, electrical resistance material is inserted in the grooved path. That strip is only partially received by the groove so that a major portion of its width projects toward but not beyond a plane defined by the face of the block. Electrical terminals are provided at the ends of the strip and the block is adhered to the bottom surface of the ceramic top to encapsulate the heating element.

Abstract: A high temperature unitary electrical resistance heater which is mechanically supported throughout its active length but spaced from a refractory base with the heating element being substantially free of the supporting structure to provide an efficient heater having relatively low thermal inertia while being rigidly supported for high temperature operation. A flat continuous electrical resistor ribbon is folded in a multiple loop helix-like configuration formed of a plurality of straight segments and a repetitive array of folded, overlapped corner portions. A strut is interposed within each folded corner and welded therein, outwardly extending end portions of each strut being rigidly secured in a refractory base structure with the resistor ribbon being spaced along its active length from the base structure.

Abstract: A high temperature unitary electrical resistance heater which is mechanically supported throughout its active length but spaced from a refractory base with the heating element being substantially free of the supporting structure to provide an efficient heater having relatively low thermal inertia while being rigidly supported for high temperature operation. A flat continuous electrical resistor ribbon is disposed in a multiple loop configuration having a plurality of spaced heater segments with flat confronting surfaces and a plurality of legs outwardly extending from an edge of the ribbon and secured within a refractory base to support the ribbon in spaced relation to the refractory base.