Abstract: There is disclosed an arrangement for mounting a heating coil relative to a supporting wall of a clothes dryer heater housing. An insulator has a main body portion adapted to secure the heating coil relative thereto and a base portion adapted to be seated in fixed relation to the supporting wall. The base portion has first and second flanges which curve downwardly and outwardly from the insulator. The support wall has two raised tab members which are adapted to define between these tab members and the supporting wall a recessed channel for receiving the first flange of the insulator. The supporting wall further has two spaced apart guide members for engagement with opposite sides of the second flange of the base member to prevent relative lateral movement of the insulator. The supporting wall has a pivotably movable locking flange which is pivotable about a crease located between the two guide members.

Abstract: An insulator has been invented for use between adjacent portions of wire coils of a helical heater wire, the insulator, in one aspect, having a body member with a front, a rear, a first side, a second side, a top, and a bottom, a first groove formed in the front of the body member and extending from the first side to the second side, the first groove for receiving and holding a first portion of a first wire coil. In certain aspects the insulator also has a second groove formed in the rear of the body member spaced apart from the opposite the first groove, the second groove extending from the first side to the second side, the second groove for receiving and holding a portion of a second wire coil adjacent to and spaced apart from the first wire coil. In one aspect the first and second grooves are at a top of the body member and another pair of such grooves are at the bottom of the body member. A heater element has been invented with such an insulator and a heater has been developed with such a heater element.

Abstract: A ceramic heater coil support bracket, suitable for use in a clothes dryer, supports a helically wound heating coil in spaced apart relation from a support surface or wall. The bracket includes a base adapted for securement to the support surface and a pair of spaced apart arms upstanding from the base defining an open slot extending across the bracket in a transverse direction above the base. Each of the arms includes a coil support post having an arrowhead shape extending inwardly toward of the slot. Each of the posts includes inner and outer coil receiving grooves adapted to receive consecutive turns of the coil. The posts are laterally offset from each other in the transverse direction of the slot so that the posts support different consecutive turns of the coil. The posts have a relatively flat upper surface having an arrowhead shape projecting into the slot with sloping inside and outside surfaces of the arrowhead tapering outwardly and downwardly from the top surface.

Abstract: An electrical resistance heater (12) has an elongate electrical heating coil (C) with a plurality of convolutions (C1, C2). An electrical insulator (10) supports the convolutions and includes an insulator body (18) mountable to a support frame (19). A generally circular projection (20) extends from one side of the body and is integrally formed therewith. A generally arcuate section (26, 28) of the projection, on opposite sides of the projection, is spaced from an adjacent surface (30, 32) of the body. A notch (34, 36) is formed by the respective surfaces of the body and the projection for respective coil convolutions (C1, C2) to be received in the respective notches. The upper end (42, 44) of the faces (38, 40) of the projection are tapered outwardly from the top of the projection to facilitate coil installation. A shoulder (30s, 32s) formed on the insulator body adjacent each notch helps retain the coil convolutions in the notches.

Abstract: This invention relates to a lead-free ceramic insulator, such as that utilized in headlamp switching assemblies. The composition utilized to make the lead-free ceramic insulator includes low melting glasses which form low-viscosity liquids at low temperatures. The glasses generally contain alkali and/or alkaline earth oxides and boron oxide. Aluminum oxide may be added to compensate for the alkali and alkaline earth containing glasses which are sensitive to corrosion by water. The compositions have a low sintering temperature.

Abstract: A ceramic high temperature vacuum furnace heating element standoff 10 is provided to hold a portion of an electrical high temperature heating element 62 inside the hot zone of a vacuum furnace. The standoff 10 comprises a heating element holder 18 and an anchoring rod 16. The heating element holder 18 is designed as a single ceramic piece constructed to retain the vacuum furnace heating element. The anchoring rod 16 has a straight end 50 and a hooked end 52. The straight end 50 is inserted into a neck 34 of the heating element holder 18 where the rod is retained by a pin 60. The standoff 10 is held to the vacuum furnace wall 58 by engagement of the hooked end 52 with a transverse pin 86 in a pipe-like member 82 welded to the vacuum furnace wall 58.

Abstract: A heat processing apparatus comprises a reactor tube in which matters to be processed are housed, a wire-shaped heating unit enclosing the reactor tube, a support device for supporting the heating unit at plural positions, and reinforcing members for reinforcing the support device. The support device includes plurality of holders stacked one upon the others, each of the holders has recesses on those two faces thereof which are contacted with faces of its adjacent ones, and when the holders are stacked one upon the others in a pole, the recesses of the two adjacent holders stacked form a hole through which the heating unit is passed. The support device has support members each supporting a pole of the holders stacked and each of the holders is engaged with its corresponding support member.

Abstract: A sheet-like ceramic substrate for tip parts is provided which can effectively prevent occurrence of a crack thereof. The ceramic substrate comprises a ceramic sheet 7 having first and second primary dividing grooves 2a and 2b and first and second secondary dividing grooves 3a and 3b formed at mutually corresponding locations of the opposite faces thereof. The depth of the dividing grooves 2a, 2b, 3a and 3b is comparatively small, and while the opposite ends of the first primary dividing grooves 2a and on one face of the ceramic sheet 7 extend to a pair of opposing sides 7b of the ceramic sheet 7, the opposite ends of the second primary dividing grooves 2b on the other face of the ceramic sheet 7 are spaced from the opposing sides 7b, and the opposite ends of the first and second secondary dividing grooves 3a and 3b are spaced from the other pair of opposing sides 7a of the ceramic sheet 7.

Abstract: The improved heating coil support and insulation mechanism of the present invention is intended for use in regard to electrical heating assemblies which include heating coils supported and electrically insulated by means of coil support insulators, and each of which includes an insulator body and coil engagement means attached to the insulator body for engaging the convolutions of the heating coil. In the improvement of the present invention support rods have a locking projection disposed from a longitudinal surface thereof. The insulator body has a pair of support rod apertures extending therethrough, which have a rod support locking projection accommodation slots therein for initially receiving passage therethrough of the locking projection of the support rod.

Abstract: An insulating support for a helical wire heating coil for an electric resistance heating element includes a coil supporting notch into which a single helical coil turn is inserted and locked into position without twisting the coil and without unduly stretching the coil in an axial direction. The supporting notch includes lead-in ramp surfaces to spread the two halves of the coil turn until the coil is centrally positioned in the notch, whereupon the coil turn snaps into locking engagement with four separate abutments to prevent dislodgement. A central portion in the notch includes a separate coil supporting surface that limits further movement of the coil into the notch and the notch also includes interior lateral abutment surfaces to engage the outside of the coil turn and prevent lateral movement in the notch. The faces of the support body adjacent the notch are engaged by opposite half portions of the coil turn to preclude axial movement of the coil once it is locked in position.

Abstract: An electric heater incorporating simple support structure therefor. A frame is insulated from an electric resistance heater coil by insulator supports mounted within beam members of the frame. The supports incorporate structural features enabling the use of simplified supporting beams. The support insulators include additional structural features for retaining the resistance wire in place and for simplified engagement therewith. The insulators may project on both sides of the support beams and retain heater wires in two planes. The support insulators further provide an integrated structure easily fabricated and simply assembled to the frame.

Abstract: A heating coil assembly for use in an air blower device has an annular support element, a first end cap, a core having a heating coil spirally wound thereon, a sleeve surrounding the coil and core, and a second end cap. All components have a centrally disposed non-circular bore therein for receiving a heavy gauge non-circular wire retainer, swaged at one end, which extends through the entire assembly and is retained by a press washer at an opposite end. The interior of the sleeve is spaced from the coil forming an axial channel for air flow over the coil. Axial openings in the end caps form air inlets and outlets for the channel. The coil has several leads, at least one of which extends through an axial opening in one of the end caps. The heating coil assembly has a small number of components, which are easily assembled and simultaneously axially and radially positioned and retained relative to each other by the wire retainer.

Abstract: A duct heater includes end brackets connected by frame bars. The end brackets are formed into a geometric shape whereby only corners of the bracket engage an inner surface of the duct. Assembly is facilitated by providing the end brackets as thin, flat strips having narrower and wider sections. The frame bars are attached to the wider sections, and when the strips are bent to form a closed geometric form, the thinner sections are curved to form duct-engaging corners while the wider sections remain substantially straight. Insulating supports are attached to the frame bars, and a heater coil is attached to the insulating supports. The structure may be easily slid into a duct because only the corners of the end brackets contact the duct.

Abstract: An insulator for a coil-type electric resistance heater is disclosed in which the insulator has inclined side faces forming the outer end of the insulator angling inwardly toward one another with side notches in the insulator at the base of the inclined side faces and a central notch in the outer end of the insulator between the two inclined side faces. The distance between the center notch and the outer ends of the inclined side faces is less than the spacing of the adjacent convolutions of the heater element coils so that upon aligning one convolution with the central notch and upon moving the insulator inwardly toward the axis of the coil, the one convolution will be received in the center notch and the adjacent convolutions will be wedgingly engaged by the side faces of the insulator so as to resiliently spread the convolutions such that the adjacent convolutions will snap into the side notches.A method of installing an electrical resistance heater on a plurality of insulators is disclosed.

Abstract: Utility model patent for a support for electrical resistances of ovens or kilns with ceramic mantle thermal insulation, used to support resistances of the kind consisting of a filament or ribbon of electrical conductor material laid in a sinuous or fretwork fashion on supports and, in this model, comprised of an isosceles-triangular end 1 which is driven into the mantle 2 and followed by a middle flange 3 which is in turn followed by a cylindrical end 4 on which rests the filament or ribbon constituting the resistance 5, the part being completed with a removable ring 8 which is placed on the free end of the end 4 and holds fast on the said end section 4 the portion of ribbon or filament constituting the resistance 5.

Abstract: An electric heater incorporating simple support structure therefor. A frame is insulated from an electric resistance heater coil by insulator supports mounted within beam members of the frame. The supports incorporate structural features enabling the use of simplified supporting beams. The support insulators include additional structural features for retaining the resistance wire in place and for simplified engagement therewith. The insulators may project on both sides of the support beams and retain heater wires in two planes. The support insulators further provide an integrated structure easily fabricated and simply assembled to the frame.

Abstract: An insulated electric heating element particularly suitable for use in a hot plate or electric stove is disclosed. The insulated electric heating element (11) includes a unitary two chamber housing (21). The chambers are located one above the other. A U-shaped upper chamber (22) houses a resistive electric heating element (23). A U-shaped lower chamber (24) houses thermal insulation (30). The thermal insulation reduces the heat radiated downwardly and sidewardly and correspondingly increases the heat radiation upwardly by the electric heating element.

Abstract: An insulator for an electric heater employs a central elongated slot and two guide surfaces. Below each guide surface is a notch for receiving an outer convolution of a heater coil, while the central slot terminates in a notch for receiving an intermediate convolution of the heater coil. The slot engages the central convolution of the heater coil before outer convolutions engage the guide surfaces to facilitate installation of the insulator. As the insulator is inserted into the heater coil, the guide surfaces engage the outer convolutions and direct them to respective notches for securely holding the heater coil. The insulator may support a single pass of the heater coil or may be arranged to have these surfaces and notches on opposite ends to support two passes of the heater coil.

Abstract: An electrical resistance heating assembly having specially designed electrical insulators is disclosed. The electrical insulators have arms shaped to retain an electrical resistance heating coil which can be quickly, easily, and reliably mounted on the arms of the insulator. Top parts of the arms are generally rectangular or triangular in cross section and the arms are spaced and configured relative to each other to form a generally T-shaped opening between the arms, with the ends of the cross bar of the T-shaped opening forming electrically resistance heating coil retention surfaces. Also, cuts in side surfaces of the insulators may provide additional coil retention surfaces.

Abstract: An insulated electric heating element particularly suitable for use in a hot plate or electric stove is disclosed. The insulated electric heating element includes an insulating member comprising a layer of ceramic insulation surrounding the sides and bottom of the housing that encloses the resistive heating element is disclosed. The ceramic insulation is mounted in the bottom and extends up the sides of a cross-sectionally U-shaped channel. The legs of the channel are formed so as to adhere to the sides of the heating element housing. The ceramic insulation reduces the heat radiated downwardly and sidewardly and, correspondingly, increases the heat radiation upwardly by the electric heating element. The upper edge of the channel legs lie below the upper surface of the heating element housing to avoid creating a gap between the bottom of a vessel (e.g., pot) to be heated and the upper surface of the heating element housing.

Abstract: A heater is disclosed having an elongate wire heating element with the heating element including at least two generally parallel runs supported on a frame by insulators with the portion of the heating element consituting the runs being formed generally in a helical coil and with the portion of the heating element between the runs being referred to as a turnaround. Specifically, the turnarounds are of non-helical coil construction and have at least one loop therein between the insulators supporting adjacent runs of the heating element thereby to permit limited movement between the adjacent runs and to permit thermal expansion and contraction of the turnarounds without applying a substantial force to the insulators.

Abstract: An electric heater incorporating simple support structure therefor. A frame is insulated from an electric resistance heater coil by insulated supports mounted within beam members of the frame. The supports incorporate structural features enabling the use of simplified supporting beams. The support insulators include additional structural features for retaining the resistance wire in place and for simplified engagement therewith. The insulators may project on both sides of the support beams and retain heater wires in two planes. The support insulators further provide an integrated structure easily fabricated and simply assembled to the frame.

Abstract: This invention provides a radiant heating apparatus utilizing a continuous wire and formed into accordion shaped strips. Three strips are shown and the ends of the strips have connecting end portions that are disposed in slots. The strips are carried in longitudinal grooves in a support member having electrical and heat insulating capability. This support is conventionally ceramic or the like and has the capability of withstanding up to thirty-two hundred degrees Fahrenheit. The wire strips are retained in the grooves by metal retaining members of conventional construction. The preferred retainer has a spring-like bias capability to retain the wire strip in the groove during heating and cooling. The apparatus is supported by a metal frame which carries the apparatus without affecting the strips and/or crossovers for a possibility of a short or hot spot. The back side of the apparatus has an electrical insulation board to prevent accidental contact with the metal wire retaining means.

Abstract: An improved ceramic heater support and spacer block, for use in an electrical heating element, is constructed to increase the amount of electrical wire per unit space available for plug-type conventional heating units. The ceramic heater support block, T-shape in plan, has spaced end faces and a groove in its under surface extending between and perpendicular to the end faces which receives a crossbar interposed between support elements. Each block has a support boss of a width adapted to extend between the strands of a section of heating wire. Each block has a pair of spacer bosses, adjacent to its other end face, which extend laterally outward of the support boss. Each heating wire section of a group is mounted upon the support boss of each block, upon a crossbar, with the spacer bosses extending between and outward of adjacent sections. The one strand of adjacent heating wire sections is transversely interconnected below a row of support blocks mounted upon an adjacent crossbar.

Abstract: An insulator for an electrical heating element includes an inner section and an outer section removably disposed thereabout. The electrical heating element is removably and loosely received within at least one of the sections. Several of these insulators can be used to make a new and improved electrical heating element assembly.

Abstract: For the secure positioning combined with a quick regulation of the thermal equilibrium of thin layer resistances, especially in hot film anemometers, there are used holding devices in which the thin layer resistance 2 is rested on at least three pointed supports 4 of a holding clamp 1 and is pressed on at least two of the supports 4 with clips provided with spikes.

Abstract: An apparatus replaceably carries an electrical resistance element for a furnace. The electrical element is of serpentine configuration having a plurality of U-shaped portions. At least one plate-shaped carrying element is mechanically fastened in a block of ceramic fibrous material. The carrying element includes a plurality of through-passages into which the U-shaped portions of the electrical element are inserted. The through-passages each include side walls and transverse walls which restrain movement of the electrical element in all directions except a direction in which the electrical element is inserted and removed. The carrying element is spaced from the adjacent curved segments of the U-shaped portions. The electrical element terminates in elongated terminals which are carried by a plug of fibrous ceramic material. The electrical element is situated within a recess of the ceramic block.

Abstract: An improved electrical heating element is constructed to increase the amount of electrical wire per unit space available for plug-type convection heating units. The heating element includes a metal frame structure with a plurality of spaced support elements and a plurality of spaced removable cross bars connected thereto. A plurality of ceramic heater support blocks, each of T-shape in plan, with spaced end faces are arranged end to end and have undercut grooves which receive a cross bar and are interposed between the support elements. A continuous electric resistance heating wire has a series of parallel spaced inverted U-shaped wire sections. The wire sections are arranged in groups. Each block has a support boss of reduced width adjacent one end face adapted to extend between the strands of a section of the heating wire. Each block has a pair of spaced bosses adjacent to its other end face which extend laterally outward of the support boss.

Abstract: A heating device (20) is provided that may be utilized in either a film packaging machine or a thermoforming machine. Heating device (20) includes a frame (32) that carries a plurality of eyelets (36) that are utilized to suspend an elongated ribbon heating element (34) so that apart from contact with the eyelets (36), the elongated ribbon heating element (34) does not contact any other portions of the heating device (20). This construction provides for very rapid heating and cooling response times resulting in an energy savings and a simplified packaging or thermoforming device, while providing accurate heat control.

Abstract: A heating element comprising a plurality of ceramic components strung together on a heating wire to form a flexible structure, adjacent ceramic components comprising integrally formed mating projections and depressions. The element comprises ceramic components of a type each having a body defining two generally parallel passages therethrough, both passages terminating at one end in a depression, one passage terminating at the other end in a depression and the other passage terminating at the other end in a projection.

Abstract: A power breaker apparatus comprises a permanent fuse and resistors connected in parallel to the permanent fuse through a connecting conductor and is connected between a power source and a load to break a current supply to the load when a fault current is passed. At least external surfaces of the parallel resistors near the connecting parts of the connecting conductor are coated by an insulating coat.

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 heating element comprising a plurality of ceramic components strung together on a heating wire to form a flexible structure, adjacent ceramic components comprising integrally formed mating projections and depressions.

Abstract: An open coil electric heater comprising a rigid support frame composed of a pair of longitudinally extending, laterally spaced members, with cross members between and secured to the longitudinal members. The cross members carry ceramic coil supports which are detachably connected to the cross members. Each coil support has an end formed with a cross slot to pass a part of a convolution of a coil and hook-like projections are formed on opposite sides of a coil support and are cooperable with the coil convolution part to detachably hold the same to the coil support. The heating coil is secured to the coil supports in expeditious manner and without the use of tools by twisting the coil so that said convolution part is aligned sufficiently with said cross slot to enable said part to be seated within said slot. The coil is then permitted to spring back so that the convolution fits against opposite side faces of said coil support and held in position by said hook-like projections.

Abstract: A support member for an electric heating assembly of the type having a plurality of heating elements supported by electrical insulators. The support member comprises channel-like strips sized to receive the electrical insulators and includes tab-like portions integrally formed from at least one of the walls of the strip and lying across the opening of the channel defined by the strip. Adjacent ones of the tab-like portions lock the insulators in position on the support member.

Abstract: An electrical heating mat comprises an electrical resistance heating wire arranged in a loop formation with substantially straight leg portions between curved portions. A plurality of spaced apart spacer strips made of thermoplastic material are provided to hold the heating wire its looped formation. Each spacer strip comprises an elongated narrow strip body having a plurality of spaced open-sided were receiving loops having an inner dimension assuring snap-fit reception of the wire therein. One end of each strip body is provided with a snap-in coupling member dimensioned to snap-fit into a wire receiving loop at the end of an adjacent spacer strip to enable a plurality of mats to be interconnected together to form a larger unit. Spacer lands extending generally parallel to the leg portions of the heating wire may connect the spacer strips together.

Abstract: A pair of strips having spaced cutouts therein are placed in lapping relation so the cutouts form openings to receive insulating bushings having circumferential grooves therearound at least some of the end margins of the intervening webs between the cutouts being retroverted to take the form of barbs which in the assembled relation face corresponding barbs of the other strip.

Abstract: A support strip for insulating bushings has spaced cutouts therein to receive the bushings. A locking bar which closes the open side of the cutouts to hold the bushings in place is arranged so that it interengages with the web portions between the cutouts by being received on first one side and then the other side of successive webs.

Abstract: Our invention relates to open coil electric heating elements of conventional construction but treated to resist corrosion and to electrically insulate exposed metallic surfaces. In accordance with the invention, the component parts of the heater, except the coiled resistance wire and in some cases the supporting insulating bushings, are assembled and then coated with a silicone resin-based coating composition. The composition is applied in a flowable state to cover all exposed surfaces and fill all cracks and crevices to thereby prevent accumulation of moisture thereat.

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.

Abstract: A heating coil assembly for use in an air blower device has an annular support element, a first end cap, a core having a heating coil spirally wound thereon, a sleeve surrounding the coil and core, and a second end cap. All components have a centrally disposed non-circular bore therein for receiving a heavy gauge non-circular wire retainer, swaged at one end, which extends through the entire assembly and is retained by a press washer at an opposite end. The interior of the sleeve is spaced from the coil forming an axial channel for air flow over the coil. Axial openings in the end caps form air inlets and outlets for the channel. The coil has several leads, at least one of which extends through an axial opening in one of the end caps. The heating coil assembly has a small number of components, which are easily assembled and simultaneously axially and radially positioned and retained relative to each other by the wire retainer.