Abstract: A high-performance resistor includes resistor elements electrically connected in series and each having a first and second side and a first and second end. At the first end is a first connection and provided at the second end is a second connection for connecting the resistor elements). The first and second connections each have an inner portion and an outer portion. The inner portion of the first connection is bent at a predetermined angle with respect to the first side of the resistor element. The outer portion of the first connection is in a plane which is substantially parallel to the plane of the resistor element. The inner portion of the second connection is bent at a predetermined angle with respect to the second side of the resistor element. The outer portion of the second connection is in a plane which is substantially parallel to the plane of the resistor element.

Abstract: An intermediate electrical connecting apparatus (14) for a seat-heating system (10) includes a first junction (48) and a second junction (50). The first junction (48) is electrically coupled to a first heating element segment (30) of a heating element (18). The second junction (50) is electrically coupled to a second heating element segment (32) of the heating element (18). A seam segment (52) is electrically coupled between the first junction (48) and the second junction (50) and includes a plurality of redundant electrically conductive connections (54), which have a spacing arrangement therebetween.

Abstract: An electric heating device includes a flexible resistor ribbon, a plurality of sections of electroconductive coating attached to the resistor ribbon at preset intervals, and connector contacts coupled to the resistor ribbon for enabling connection of a power source to the resistor ribbon. The resistor ribbon has a high specific impedance. The flexible resistor ribbon is attached to a rigid or flexible flat base panel for incorporation into a building as a floor, wall or ceiling panel. Layers of electric insulation are attached to the base so as to sandwich the flexible resistor ribbon. Where the resistor ribbon is bent back on itself, for example, to form a snaking configuration, a strip of two-sided adhesive tape is attached to the layers of electric insulation and to the ribbon at multiple spaced points.

Abstract: A multielement resistor may be assembled into a matrix from a plurality of resistor elements (12) of a U shape construction. The elements (12) are suspended from their upper portions by connecting brackets (16) which are supported by a supporting frame (14). Connecting brackets are preferably of electrically conducting material and insulated from supporting frame (14). Power input/output brackets (18) are provided.

Abstract: A layered electrical resistor having flat components stacked as follows: a first metal outer plate, a first thin outer electrical insulator, a first thin sheet metal resistor element, a first thin inner insulator, a metal midplate, a second thin inner insulator, a second thin sheet metal resistor element, a second thin outer insulator and a second metal outer plate. The stacked components are compressed together by rivets or otherwise. Each sheet metal resistor element is stamped, punched or otherwise cut with at least first and second terminals and interconnected ribbons forming a resistive path therebetween. A thermal fuse or other circuit breaker is thermally engaged with a seat on the midplate and is connected in a series circuit with the resistor elements to open the circuit to prevent overheating thereof. Structural tie bars are formed integrally with ribbons and terminals of the resistor elements and are severable therefrom before assembly of the components.

Abstract: A serpentine etched foil heater has a segmented serpentine conductor group made up of a plurality of spaced-apart elongated serpentine conductive strips that are connected in parallel and are everywhere aligned with each other. Advantageously, central conductive strips are wider than are conductive strips along the edges. Further advantageously, the conductive strips are bridged by conductive regions that extend along lines of constant voltage. This makes it possible to handle the heater element without causing it to become tangled. The heater is especially suitable for low voltage applications.

Abstract: An integrated circuit resistor array suitable for use as resistors included in a high performance analog integrated circuit is provided. A plurality of resistor stripes are collectively arranged in a region on a substrate. The resistor stripes are made of the same material and designed to have the same cross-sectional area. The resistor stripes are electrically connected through first metal layer conductors. Second metal layer conductors connect the stripes to external circuits. Different resistors have matched voltage dependencies.

Abstract: A resistor grid assembly has a continuous resistor weave with a plurality of generally parallel, plate-like electrical elements. U-shaped bends join two adjacent elements at adjacent ends. The U-shaped bends are located in a bottom group and a top group. There is a top electrical insulating member adjacent the U-shaped bends in the top group and spaced from the U-shaped bends. There is a bottom electrical insulating member adjacent the U-shaped bends in the bottom group. Stop U-shaped pins having a pair of legs with a pair of shoulders are supported by the bottom electrical insulating member. The legs of each stop U-shaped pin extends into a pair of holes in the bottom group of U-shaped pins and rest upon the shoulders which are spaced from the insulator. Wire U-shaped pins are supported by the top electrical insulating member. The wire U-shaped pins have legs inserted into holes in the U-shaped bends in the top group. The U-shaped bends in the top group are spaced from the top insulator.

Abstract: An expandable band heater having multiple heater segments wherein a jumper type arrangement is utilized between heater segments to reduce the number of sets of lead wires or other termination configuration for providing power to each of the heater segments.

Abstract: A surge protector, particularly for protecting components in a telecommunications system, has a thin ceramic substrate on a surface of which is formed a surge protection resistor having a serpentine path extending over the substrate, the width of the path and the distance between adjacent path lengths being relatively narrow. Resistance trimming means are provided, positioned such that there is a substantially isothermal heat distribution over the substrate under surge conditions.

Abstract: An electric hair curler comprises a handle and a barrel connected thereto for winding thereabout the hair. The barrel is provided with an electric heater for curling the hair wound on the barrel. The heater includes a plurality of resistor elements in the form of strips extending along the length of the barrel in generally parallel relationship with one another and being electrically connected in series by a corresponding number of bridging segments. The heater thus constructed is mounted on the barrel with the resistor elements thereof being exposed on the outer surface of the barrel in circumferentially spaced relationship with one another around the barrel, so that each of the resistor elements is in direct heat transfer contact with the hair to be wound on the barrel, thus greatly reducing the heat loss to assure effective heat transfer from the heater to the hair.

Abstract: These resistors are obtained from conductive sheet material, for example metal sheet material (usually referred to as "grids") in which additional plates are provided in order to distribute the current density and consequently to predetermine the temperature and strain distributions caused on the resistor during load conditions.

Abstract: A heat treating furnace having a work chamber of circular cross-section and having banks of electric resistance heating elements formed by rigid and elongated graphite bars. The graphite bars of each bank are interconnected so as to form an octagon located closely adjacent the circular wall of the work chamber and closely approximating the circular shape of the chamber. As a result of the octagonal arrangement, ring-like banks of rigid graphite elements may be space longitudinally along the circular work chamber to enable front-to-rear temperature trim zones to be established in the chamber.

Abstract: A material heating furnace with a heating element formed of corrugated metal strips which are spaced at one of the ends thereof by a jumper strip which is welded or otherwise fastened to the metal strips. Also, terminals are provided which are slotted so as to alleviate stresses due to bending.

Abstract: A high temperature furnace particularly adapted for fusing crystalline silica includes a housing defining a heating chamber that receives electrically conductive elements with insulators positioned therebetween to establish an electrical flow path for heating the chamber. Resilient gas cylinders located externally of the housing bias graphite connecting rods that extend into the heating chamber to compress and position the conductive elements and the insulators therebetween while allowing expansion thereof during heating of the chamber. Graphite wall panels preferably define the housing heating chamber and have interlocking edges that position the panels relative to each other. Cooperable pairs of resilient gas cylinders at longitudinal ends of the furnace housing compress the wall panels to maintain the edges thereof in their interlocking relationship while permitting expansion during heating of the chamber.

Abstract: An improved bimetal actuator is disclosed. A thin film resistor is fixed to the high expansion side of a bimetal element and, when energized, generates sufficient heat to actuate the bimetal. The resistor has a serpentine configuration formed by a continuous series of loops, each successive loop having a greater width from the fixed to the free end of the bimetal, to provide differential heating of the bimetal and thus a greater movement of its free end for the power dissipated in the resistor.

Abstract: A continuous composite web from which electrical low temperature heating mats can be produced by transverse cutting at certain positions and possibly by effecting an edge insulation and attaching electrical connections. A method for the production of such webs is also disclosed. The web consists of resistance foil material between two insulating foil layers which are joined in the areas of direct contact to secure the resistance foil. The resistance foil material is in the form of parallel, continuous, longitudinal strips and transverse strips extending transversely to said longitudinal strips at desired intervals and connected thereto to form electrical connections between adjacent foil strips. The transverse strips extend substantially across the total width of the web and can be in the form of an insulation strip having flat foil conductive pieces on the insulation strip.