Abstract: A method for attaching and securing an apertured mounting bracket to a metal sheathed electric heating element received therethrough to insure firm mechanical support, prevention of relative axial motion, reliable electrical grounding, and ease of adaptation to automated assembly.

Abstract: An elongate flexible package (10) adapted to contain and either enhance or contribute to the control of the heating efficiency of an elongate heating element contained therein and having sufficient flexibility to conform to the item to be heated to which it is secured. Package 10 is provided with a first layer (1) made from a flexible heat conductive or heat insulative material and a second layer (2) made from a heat insulative material that is secured along the length of package 10 to the side of first layer (1) that faces away from the item to be heated to which package (10) is secured. A third protective layer (3) is disposed over second layer (2) and a cavity (4) enclosed by a portion to the walls of layers (1), (2) and (3) extends along the length of package (10) having a cross-sectional configuration adapted to contain and permit the heating element to be axially inserted into or removed from package (10) without having to remove package (10 ) from the item to which it is secured.

Abstract: A reservoir for an electric kettle is defined by a dome shaped shell and a planar inner bottom, which are fastened together mechanically having a room temperature vulcanized silicone rubber filler located therebetween to act as a seal. The shell is skirted by an inwardly projecting annular lip and has an inwardly projecting annular shoulder parallel with and spaced from the lip. The inner bottom is bounded by a downwardly extending annular flange, the top edge of which abuts the bead and the bottom edge of which engages the lip. The form of the kettle components permits the interior of the shell to be coated between the lip and shoulder with an annular coating of the silicone rubber whereat the inner bottom is readily snapped into position in the shell during assembly of the kettle.

Abstract: An electric hot plate has a molybdenum disilicide resistance wire heating element spaced above a fibrous refractory pad by wire supports and spaced below a transparent glass plate forming a cooking surface. The pad has a smooth top surface, the wire is looped back and forth sinuously or possibly spirally coiled to form a layer which is parallel with the pad surface and the glass plate, and the wire is designed to operate at temperatures preferably of from about 2300.degree. to 2500.degree. F. or higher, at which temperatures the pad surface has been found to be effective for diffusely reflecting upwardly the wire heat radiation.

Abstract: A means for attaching and securing an apertured mounting bracket to a sheathed electric heating element received therethrough to insure firm mechanical support, preclusion of relative axial motion, reliable electrical grounding, and ease of adaptation to automated assembly, characterized by an initially flangeless sleeve shaped to form a double grip at opposite ends to the heating element with the bracket clamped therebetween.

Abstract: An electric resistance heating unit in which the heating element is a thin, foil-like strip of expanded metal supported on edge substantially along its entire length on a board of insulating material. The heating element is formed in a serpentine pattern, and its bottom edge is embedded in a similar serpentine groove in the upper surface of a ceramic fiberboard and cemented therein.

Abstract: A furnace is described which comprises an insulated muffle comprising a ceramic fibrous body into which work pieces may be directly introduced through an opening. A closure member is arranged to close the opening, and means are provided for energizing a coiled heating element disposed in an open channel within the body and for controlling the rate at which the muffle is heated. The opening is arranged at the top of the muffle so as to ensure its rapid cooling subsequent to removal of the closure member therefrom. To enable the muffle to withstand rapid cooling, and in particular to retain the heating element in position, a plurality of strips of ceramic fibrous material are cemented diagonally across the top of the open channel. The closure member may be latched in the closed position by atmospheric pressure as the result of evacuating the interior of the furnace.

Abstract: The coiled resistance heating wire is supported on electrical insulating stand-offs in a figure 8 pattern on each side of a metallic radiation panel. The radiation panel and the figure 8 arrangement of the coil each contribute to increased heat transfer to air flowing axially down the assembly in a duct and in combination result in even more efficient heat transfer.

Abstract: A molybdenum disilicide electric resistance wire powered to heat to temperatures of from 2000.degree. to 2600.degree. F. has one or more supports directly contacting the resistance wire and made of an Fe-Cr-Al alloy having its surface covered by oxide preventing chemical reaction between the wire and the support.

Abstract: A packaging arrangement for an electrical heater unit adapted for adhesive attachment to a surface, for example, to a window of a motor vehicle. The heater unit includes a plurality of heater strips which have an adhesive coating on one face thereof whereby the strips may be secured to the window. The strips are supported in a desired pattern for application to the window by being adhesively mounted on one surface of a backing sheet. The adhesive coated surfaces of the strips are remote from the backing sheet and a removable cover sheet overlies the heater strips. A clearance is provided between the cover sheet and the adhesive coating on the heater strips so that the cover sheet is not contacted by the adhesive coating on the heater strips.

Abstract: A means for attaching and securing an apertured mounting bracket to a sheathed heating element received therethrough to insure firm mechanical support, prevention of relative axial motion, reliable electrical grounding, and ease of adaptation to automated assembly. A method for effecting the attachment is disclosed.

Abstract: A toaster chassis assembly for supporting heating element cards in an upstanding position in parallel relation, to define a bread-receiving slot therebetween, includes a horizontal base and end walls extending vertically upwardly from opposite ends of the base. The base defines a plurality of spaced slots for receiving tabs formed along the lower edges of the heating element cards for mounting the cards between the end walls and a plurality of tabular hooks extending from the base. Wire bread guards each comprising a plurality of vertical elements and an upper and lower horizontal element to form a grid, are mounted adjacent to the heating element cards to prevent engagement of bread slices being toasted with the heating element cards. The lower horizontal elements of the wire bread guards are received in the tabular hooks and the upper horizontal elements are received in slots formed along the upper edges of the end walls for supporting the bread guards.

Abstract: A heating device for heating a glass surface, such as the rear window of a car, includes a pair of elongated electrically non-conductive carrier strips having an adhesive layer on both sides thereof and secured in spaced-apart relationship to the glass surface by one of their adhesive layers to laterally delimit the surface area of the glass encompassed by the heating device. A plurality of spaced, thin electrically conductive foil strips, each cut in predetermined lengths from a continuous strip, and each of which has an adhesive layer on one side, extend between the carrier strips. The ends of the foil strips overlie the carrier strips and are secured to the carrier strips and the glass surface by the adhesive layer thereof. A strip-shaped electrical terminal conductor overlies each carrier strip in electrically conductive engagement with the foil strip ends and is fastened to the carrier strip by the other adhesive layer on the carrier strip exposed between the foil strip ends.

Abstract: A method of mounting heating wire coils on ceramic fiber insulation walls. A ceramic fiber cement bead is applied in a desired pattern to the surface of a ceramic fiber wall, either directly to a flat surface or in a groove. An elongated iron-chromium-aluminum alloy heater wire coil is pressed into said cement so that the cement flows up and over the coil loops which contact the wall and the cement is cured. Because of the non-scaling (adherent Al.sub.2 O.sub.3 skin) characteristics of this heater wire alloy, the cement adheres tenaciously to the wire even under severe thermal shock and temperature cycling.

Abstract: There is disclosed a support leg for a heating element of an electric unit including vertically extending arm members including inwardly extending teeth members which firmly engage the outer surface of the heating element in a manner to prevent subsequent rotation of such support leg.

Abstract: A heating element comprises a resistance heating wire formed with closely adjacent zigzag loops and wound helically on an insulating plate or a pair of such plates mounted crosswise and possibly narrowing conically towards one end. Opposite loops engage the respective edges of such insulating plate, possibly in notches in those edges, and may be pressed on to those edges. The plate may have holes near its edges, the engaging loops being formed with kinks which clip into the holes. Spring clips may be provided for electrical connections to such loops at the edge of such plate and may also be formed with kinks which clip into the said kinks of the loops. The electrical connection to such spring clip may be a cable rivetted, eyeletted or soldered to a cross-piece interconnecting the legs of the clip or may comprise an angled tongue formed at the end of one of the legs to receive a flat plug-in connector.

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 flexible tape, adapted to be rolled into a coil and to be cut into sections of any desired length, includes an elongate carrier of woven cloth impregnated with a flexible, carbon-containing resistance layer and a flexible heat shield, coextensive with the carrier, on one side of that layer, this assembly being enveloped in a flat sheath of synthetic resin. A surface of the sheath on the side of the heat shield may be coated with adhesive for detachably securing a backing strip of paper thereto. Two transversely spaced conductors, extending adjacent the longitudinal edges of the tape over the entire length thereof, are in conductive contact with the resistance layer for facilitating the passage of a heating current therethrough. The ends of the conductors in a section cut from the tape can be bared by removing parts of the sheath, the carrier and the heat shield. Several such sections can be laterally juxtaposed for the heating of a larger area.

Abstract: A flexible electrical heating element includes a resistance heater which defines a seam, particularly a zig-zag seam, supported on an air-permeable, flexible, flat plane-like carrier. The carrier, is fastened by means of closing-seams to a perforated plastic foam web. The heating element is suitable for use in heating seats or couches in motor vehicles and the like.

Abstract: A heating element assembly having a thermally conductive ceramic top sheet against the underside of which is positioned a thermally and electrically insulating base pod having a recess containing a loosely secured, planar array of thin, flat strips of apertured, foil-like, electrical resistance material. The array is spaced from the ceramic sheet a predetermined distance and disposed in such a manner as to provide a large amount of heat radiating surface adjacent to the underside of the ceramic top. The spacing between the array and the ceramic top sheet enhances even radiant heating of the ceramic top. Such a heating element assembly is low in cost and high in thermal efficiency, having particular utility as a burner for a ceramic top electric range.

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.

Abstract: A ceramic insulator having sidewalls, a front wall and a back wall with an outwardly extending mounting shoulder at the upper end of the front and back walls; a passageway extending between the sidewalls of the insulator to form an open interior portion within the insulator which receives a ribbon heating element and a slot in the front wall connecting with the open interior portion of the insulator for insertion of a ribbon heating element into the open interior portion; a bearing surface within the open interior portion to support a ribbon heating element; and an elongated radiused rib extending outwardly from each sidewall below the bearing surface to provide curved contact surfaces for a ribbon heating element.