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: 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 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 method of adjusting the values of resistors is described wherein regions of a resistive layer provided on a substrate are removed by means of a laser in dependence on the resistance that is required and/or by cutting marks of a specific shape into the resistive layer. In order to obtain resistors with values which are defined as accurately as possible, and which are free of disturbing inductivity, a point raster is formed in the resistive layer by means of single shots of the laser, with the extent and position of the raster, and/or the spacing between its individual points, and/or the size of the individual points being chosen in relation to the total area of the resistive layer in dependence on the required resistance and further physical values.

Abstract: A heater assembly includes a housing which both channels air flowing around a heating element and provides support structure for the elements holding the heating element. In one embodiment, a lower U-shaped channel has recesses in opposed sidewalls to engage down-turned ends of holding elements. A second U-shaped channel is attached to form a hollow duct open at opposite ends. In a second embodiment, a U-shaped channel is made of flexible material so that the spacing between opposed sidewalls may be varied. A holding element is secured between the sidewalls by separating the sidewalls to allow insertion of the holding means.

Abstract: An electric resistance unit characterized by a support rod with a plurality of insulating refractory bodies thereon, which bodies have grooves to fit the rod, a continuous resistance winding mounted around the bodies, and flexible metal mounting means in the groove and between the rod and the bodies for retaining the bodies on the rod.

Abstract: An electric resistor assembly for use in motor starters or other electric apparatus characterized by an elongated mounting strap having terminals at both ends respectively for panel mounting, a plurality of insulating refractory bodies on the strap in end-to-end abutment, one end wall of each body having a bulged portion protruding from the end wall, the other end wall having a cavity corresponding to and receptive of the bulged portion of an adjacent body, and a helical resistance conductor mounted on and surrounding the bodies.

Abstract: A power resistor including a resistance element of metal ribbon formed into an edgewound helix, and an internal three-point support structure axially disposed within the interior of the helix. The support structure includes three insulating assemblies each having a plurality of insulators secured by longitudinal compression springs to a support bar. The support structure also includes a pair of spreaders located at opposite ends of the helix, each having three radially extending arms. Assembly of the resistor includes the steps of inserting the insulating assemblies into the interior of the helix, radially spreading the insulating assemblies against the interior of the helix, and welding the ends of the support bars to the extending arms of the spreaders.