Abstract: The present disclosure provides embodiments of insulated compression-type electrical connectors used to connect one or more branch wires or conductors to one or more run wires or conductors.

Abstract: A fuse unit including a fuse element therein includes a first resin body and a second resin body. The second resin body is connected to the first resin body by a hinge portion and configured to be bended around the hinge portion with respect to the first resin body. A pair of first side walls and a pair of second side walls are provided on the first resin body and the second resin body respectively and extend in a direction intersecting an axis of the bending of the second resin body. A pair of engaging parts are provided at the lock arms provided at the first side walls respectively respectively, and each of which has a first inclined face. A pair of engaged parts are provided at the second side walls respectively, and corresponds to the engaging parts respectively, and each of which has a second inclined face configured to contact the first inclined face in surface contact in a state that the second resin body is bended.

Abstract: A system 10 and method for reducing the possibility of fires and/or explosions when a vehicle impacts an object includes a cable connector 12 having a first portion 14 connected to an ungrounded terminal 20 of a battery 22 in the vehicle and a second portion 16 connected to all vehicle electrical components requiring power from battery 22, an inert gas canister 18 having an internal pressure that facilitates the separation of the first and second portions 14 and 16 of the cable connector 12 when predetermined conditions are satisfied, electric squib means 24 for initiating pressurized inert gas flow from the canister 18 to the first portion 14 of the cable connector 12, an accelerometer 28 for sensing impact between the vehicle and the object, and a microprocessor 30 for signaling the accelerometer 28 to “fire” the squib means 24 when the magnitude of impact requires an inert gas flow to the first portion 14 whereby the second portion 16 is forcibly ejected from the first portion 14 and the area adjacent to t

Abstract: A thermal switch apparatus having an adapter mount that snaps to a modular thermal switch by hand or with the use of a simple tool. The thermal switch apparatus of the invention is embodied as a thermal switch apparatus including an adapter having a mounting apparatus and a receptacle, the receptacle having a female portion structured internally with a retainer. A modular thermal sensing device includes a male portion sized to enter the female portion of the receptacle, the male portion having an external relief structured to interlock with the internal retainer of the female portion. The male portion of the modular thermal sensing device is installed into the female portion of the receptacle, the retainer of the receptacle being mated with the external relief of the modular thermal sensing device.

Abstract: A thermal switch comprises an elongate tubular sealed housing. A control circuit is mounted in the housing. The control circuit comprises a thermostat, a fuse and a thermal overload switch electrically connected in series. An electrical connector is mounted to the housing and is connected to the control circuit.

Abstract: An overcurrent protection device and a method for the production thereof is provided wherein a fusible link is bonded across a pair of electrodes. A composite layer envelops the fusible link and is formed from a gelatinous composition. The composite layer and the fusible link are further encased within a molded housing. The gelatinous composition includes a nonconductive inorganic powder and a synthetic resin. The inorganic powder has a melting temperature below a fusion temperature of the fusible link. In an embodiment, the inorganic powder includes lead glass powder and alumina powder, and the synthetic resin is a low viscosity silicone resin. The inorganic powder is mixed with the silicone resin in a three to one ratio. Heat treatment dries the composite layer. The composite layer includes air pockets between particles of the inorganic powder elastically bound together by the synthetic resin.

Abstract: A board fuse includes an insulating board having a through-hole window in the middle of the insulating board and fusible elements laid over the insulating board. Further, the fusible elements are continuous metal wires substantially equal in cross section. The fusible elements are uniform and accurate in cross section and accurate in current capacity. The fusible elements extend across the window in such a manner that, at the window, they are not in contact with the insulating board. Hence, when heat is generated in any one of the fusible elements by electric current, the heat generated at the window is not absorbed by the insulating board and is increased as required, thus blowing the fusible element accurately. Accordingly, the board fuse is free from the difficulties caused by the heat generation, that is, the production of a bad smell, at worst the production of white smoke.

Abstract: An electric protective circuit includes an electric fuse and an electric resistance loop connected in series with the fuse, the fuse and loop being mounted on a substrate. The fuse includes a solder that is connected as a resistance in a current series circuit between connection terminals and that melts at elevated temperatures caused by heating of the substrate. The solder is surrounded by a material that protects the solder against oxidation by the surrounding air and completely covers the solder, enabling the solder to contract onto the connecting terminals when it melts and break the current path. The material is temperature-stable in a solid state of normal fuse operating temperatures and includes one or a combination of waxes, resins, thermoplastics, and synthetic fluxes. The material is applied in a region or area surrounding the solder that is delimited by barrier walls that prevent the material from running away from the region.

Abstract: A self-configuring photoelectric control circuit for controlling operation of a load based on ambient light. The photocontrol circuit comprises a photocell responsive to ambient light, a heating resistor connected to the photocell, a bimetallic element in proximity to the heating resistor and movable in response to generation of heat from the heating resistor. A switch is operated by the bimetallic element and is connected between an input connected to a power source and an output connected to the load. A series resistor is connected to the heating resistor and a shunt is connected across the series resistor to provide a current bypass around the series resistor for operation with a low voltage power source, for instance 120 volts. The shunt is maintained in a flexed condition to form the bypass and a connection of the shunt across the series resistor is formed of a meltable material.

Abstract: A fusible link wire for use in an electric circuit comprising a fusible conductor for opening the circuit in response to a given current level, an inner electrical insulation layer surrounding the fusible conductor, a braided sheath positioned over the inner electrical insulation layer for increasing the structural strength of the insulation layer and for holding the inner electrical insulation layer in place in the event of a failure, and an outer protective coating surrounding the sheath and the inner electrical insulation layer for holding the sheath in place during handling or processing of the fusible link wire and for providing protection against the environment.

Abstract: An electrical resistance heating element includes a pair of spaced apart electrical conductors, and a strip of resistive material disposed between the conductors and extending along their lengths. A strip of heat-sensitive, electrically conductive material is also disposed between the conductors and also extends along their lengths. The strips of resistive material and heat-sensitive, electrically conductive material together provide an electrical path between the conductors widthwise along their lengths. The heat-sensitive strip interrupts an electrical path between the conductors and widthwise through the resistive material strip only over portions of the resistive material strip which attain a predetermined temperature.

Abstract: An electrical component comprising a temperature responsive device including an electrically conducting member (1) of spring temper in contact with a thin insulating coating (3) of a substance which decomposes on being subject to an elevated temperature thereby allowing the conducting member (1) to effect a short circuiting operation. Suitably the conducting member (1) is coated with a thin layer of polyurethane varnish which vaporizes at the elevated temperature, and the conducting member (1) is arranged to engage contacts (5,5) under spring tension. In one embodiment the conducting member (1) is a wire of phosphor bronze or beryllium copper formed as a loop (2) with spring arms, the loop (2) being positioned on a pin 4 centrally disposed between spaced contacts (5) engaged by the arms under spring tension.

Abstract: An overtemperature detection cable for use with a fire alarm system, a fire extinguishing system or the like comprises a coaxial assembly of an inner spring wire conductor in a core of thermoplastic dielectric material within an electrically conductive outer sheath. In one embodiment, the spring wire is initially coiled in a three-dimensional helical configuration, is thereafter uncoiled to approximate a straight wire, and is then disposed within the outer sheath to reside in the thermoplastic dielectric core. In a second embodiment, a straight inner spring wire and its surrounding thermoplastic dielectric core reside within an outer sheath, and the assembled sheath, wire, and thermoplastic dielectric material are then bent or crimped to assume a two-dimensional sinusoidal configuration.

Abstract: This invention relates to fuses for electrical plugs and more particularly to a high and low overcurrent stratified fuse for use in a low power electrical circuit. The fuse has a layered construction in which a particulate conductive link is cooperatively applied and adhered to a heat deformable substrate. The substrate in a further preferred embodiment is thermally isolated by an insulating layer abutting the substrate on the side opposite the conductive link. The conductive link melts or disintegrates in response to high over current conditions. The substrate deforms and breaks the conductive link applied thereto in response to low over current conditions.

Abstract: A protective disconnect to prevent overheating of electrical apparatus is described. The device consists of a cutting member accepting a conductor and capable, upon closure, of severing said conductor. The cutting member is surrounded by a thermoconstrictive material which, upon being subjected to heat at a certain temperature, actuates said member.

Abstract: A fuse is described in which two fusing modes provide protection at low and high overcurrent conditions. The fuse comprises an oriented plastic substrate with a conductive layer adhered thereto.

Abstract: A heat sensing cable is provided for use in an alarm and/or fire extinguishing system, which is capable of responding to the presence of fire, or excessive heat, and to sound an alarm, actuate fire extinguishing sprinkling equipment, operate other fire extinguishing means, or to perform other emergency functions. The heat sensing cable of the invention comprises two or more multi-strand single conductor plastic coated insulated wires twisted together in a spiral manner, and which are placed under tension when in use. Each insulated wire in the multi-conductor heat sensing cable of the invention consists of a single multi-strand conductor of low electrical resistance, formed of copper or other suitable conductive material, and having any particular gage to suit any particular application.

Abstract: An irreversible heat-activatable switch includes a heat-shrinkable plastic sleeve and a pair of elongate resilient electrical conductors mounted in cantilevered manner within the sleeve interior. The conductors have a pair of diverging-converging (e.g. arcuate) portions including regions proximate the sleeve. Each arcuate portion extends from the mounted end portion of its conductor and terminates in another end portion provided with an electrical contact. The end portions are so opposed that the open-closed electrical circuit character of the pair of contacts irreversibly changes responsive to movement of the arcuate portions resulting from heat-shrinking the sleeve.

Abstract: An electric fuse comprises a fusible element, arc-quenching means surrounding said fusible element, a casing of synthetic-resin-glass-cloth laminate housing said fusible element and said arc-quenching means, and a pair of terminal elements arranged at the ends of said casing and conductively interconnected by said fusible element. Said casing includes a plurality of plies, at least an outermost ply and an innermost ply, both formed by woven glass fiber fabric and at least one intermediate ply formed by a glass fiber mat having non-uniformly oriented fibers. The outermost ply and the innermost ply each form an overlap extending substantially in a direction longitudinally of said casing. Both overlaps are angularly displaced. The casing further includes a thermosetting resin integrating said outermost ply, said innermost ply and said intermediate ply into a laminate.

Abstract: The reliability of radiation switches is improved in accordance with this invention by mechanically modifying the contact members of the switch structure to reduce the heat sinking effectiveness of the switch contact members.