Abstract: A current interrupting device includes a current limiting element on a power supply path from a predetermined power supply to a load device. The current limiting element is configured to exhibit a current limiting action when current flowing in the power supply path exceeds a first current threshold value. The current interrupting device further includes a current diversion path switch, and a controller programmed to control on and off of the current diversion path switch. The controller is programmed to switch a current diversion path switch on from an off state when it is detected that current flowing in the current limiting element is limited to a second current threshold value after the current flowing in the current limiting element has exceeded the first current threshold value, and switch the switch off again after a predetermined switched-on holding time has elapsed since the switch has been switched on.

Abstract: A fuse tube device is disclosed. The fuse tube device is allowed to be assembled with an insulation device so as to form a load break fuse cutout fully closed. The fuse tube comprises: an insulation housing, an accommodation tube, a first electrical connection unit, a second electrical connection unit, a conductive rod, a fuse element, a first conductive plate, a first cover, a second conductive plate, and a second cover. When assembling the fuse tube device with the insulation device, a first embedding member and a second embedding member of the insulation housing are embedded into a first terminal connecting opening and a second terminal connecting opening of the insulation device, such that the first electrical connection unit and the second electrical connection unit contact a first terminal connecting member and a second terminal connecting member of the insulation device, respectively.

Abstract: A fuse device including a fuse component, a first electrode, disposed on a first side of the fuse component, a second electrode, disposed on a second side of the fuse component, and a phase change component, disposed in thermal contact with the fuse component. The fuse component may comprise a fuse temperature, wherein the phase change component exhibits a phase change temperature, the phase change temperature marking a phase transition of the phase change component, and wherein the phase change temperature is less than the fuse temperature.

Abstract: A surge protective device (SPD) module includes a module housing, first and second module electrical terminals mounted on the module housing, an overvoltage clamping element electrically connected between the first and second module electrical terminals, and a thermal disconnector mechanism. The thermal disconnector mechanism is positioned in a ready configuration, wherein the overvoltage clamping element is electrically connected with the second module electrical terminal. The thermal disconnector mechanism is repositionable to electrically disconnect the overvoltage clamping element from the second module electrical terminal.

Abstract: An electric device includes an electric element having an element terminal and a conductive spring being deflected. The spring is electrically coupled to the element terminal by a fusible joint. A switch includes a first monitor terminal and a second monitor terminal. The state of the switch is changeable between a first connection state, where the first monitor terminal and the second monitor terminal are electrically coupled, and a second connection state, where the first monitor terminal and the second monitor terminal are electrically decoupled. When the joint fuses, the spring relaxes, thereby decoupling the spring and the element terminal and changing the state of the switch.

Abstract: An explosion-proof and flameproof ejection type safety surge-absorbing module includes a protective member and a surge-absorbing unit. The protective member includes a base and an upper lid coupled with the base. The base has two corresponding partitions extending upwards. The surge-absorbing unit includes a body, two connecting leads, and a resilient metallic plate. The body has two sides defining two electrode surfaces. One of the electrode surfaces is connected with one of the connecting leads. The resilient metallic plate has a first end welded to the electrode surface with a contact component and a second end curved and striding across an outer side of one of the partitions to penetrate through the bottom of the base. When the body of the surge-absorbing unit is overheated due to high temperature caused by a surge, the contact component will melt so the resilient metallic plate is ejected away from the electrode.

Abstract: A switchgear unit switches high DC voltages, particularly for interrupting of direct current between a direct current source and an electrical device. The switchgear unit contains two connections which project from a housing and which are electrically conductively coupled by a conductor path, a contact system which is arranged between the first and second connections and an isolating apparatus that can be tripped by a thermal fuse. The thermal fuse contains a melting location which is arranged in the conductor path and which is connected first to the contact system and second via a moving conductor section to the first connection. The isolating apparatus is tripped and the connection between the conductor section and the contact system is broken at the melting location when an arc produced when the contact system is opened has caused the melting temperature of the melting location to be reached or exceeded.

Abstract: A blown fuse detector according to an exemplary aspect of the present disclosure includes, among other things a fuse and a resistor in series with a circuit breaker. The circuit breaker and the resistor are in parallel with the fuse and the circuit breaker is configured to trip when the fuse blows.

Abstract: A fuse includes an upper shell, a lower shell and a cavity formed by the upper shell and the lower shell; first and second conductors which are respectively disposed between the upper shell and the lower shell. The first ends of each conductors are disposed in the cavity and form a clearance. The second ends of the conductors extend out from the cavity. A conductive bar is welded to the first and second conductors to form a first weld line and a second weld line.

Abstract: An over-current protection device includes a first conductive member, a second conductive member, a resistive device and a temperature sensing switch. The first conductive member includes a first electrode foil and a second electrode foil those are formed on a same plane. The resistive device is laminated between the first conductive member and the second conductive member and exhibits positive temperature coefficient or negative temperature coefficient behavior. The temperature sensing switch can switch the first electrode foil and the second electrode foil between electrically conductive status and current-restriction status, e.g., open circuit, according to temperature variation. The threshold temperature of the temperature sensing switch is lower than the trip temperature of the resistive device.

Abstract: The invention relates to holders for receiving fuses, with a housing having a receiving shaft, the receiving shaft containing contacts which are provided for contacting at least one fuse inserted into the receiving shaft, a cover which is adjustably arranged in the receiving shaft, a fuse holding device which is adjustably guided in the receiving shaft, wherein the cover has a unit being engageable with a guiding mechanism and which holds the cover at a predetermined position within the housing, a coupling device for detachably coupling the cover to the fuse holding device, wherein the unit of the cover is formed by feet which protrude laterally from the cover and are engageable with the guides in the housing, and wherein the guiding mechanism comprises stops and/or stop faces which are provided in the guiding mechanism, and which hold the cover in a top position of the cover.

Abstract: A switchgear unit switches high DC voltages, particularly for interrupting of direct current between a direct current source and an electrical device. The switchgear unit contains two connections which project from a housing and which are electrically conductively coupled by a conductor path, a contact system which is arranged between the first and second connections and an isolating apparatus that can be tripped by a thermal fuse. The thermal fuse contains a melting location which is arranged in the conductor path and which is connected first to the contact system and second via a moving conductor section to the first connection. The isolating apparatus is tripped and the connection between the conductor section and the contact system is broken at the melting location when an arc produced when the contact system is opened has caused the melting temperature of the melting location to be reached or exceeded.

Abstract: The 3-electrode surge protective device includes: a surge protective device body including: an earth electrode; a ceramic cylinder; and a pair of line electrodes; and a fail-safe spring including: an elastic mount portion; and a short-circuit portion, a conductive material that is sandwiched between the fail-safe spring and the body; and a pair of first lead pins provided on the pair of line electrodes; a second lead pin provided on the earth electrode. In a normal state, the conductive material support the short-circuit portion at a separation position where the short-circuit portion is separated from the outer peripheral face of the body and the first lead pins. In case where the body is overheated and the conductive material is melted, the short-circuit portion is moved to a contact position where the short-circuit portion comes into contact with the second lead pin and the first lead pins.

Abstract: A tripping unit is configured to send an electrical tripping-signal to a switching unit of a circuit breaker so as to trip main contacts of main circuits of the circuit breaker in response to a detection of a current being above a predetermined level in at least one of the main circuits. The tripping unit includes a fuse configured to be connected in series to a main circuit of the circuit breaker and a detection unit connected in parallel with the fuse and configured to generate the tripping signal for the switching unit in response to the fuse being blown.

Abstract: The present invention teaches an overvoltage protection device that includes at least one non-linear resistance element and a single cut-off device coupled with the at least one non-linear resistance element to disable the at least one non-linear resistance element when the at least one non-linear resistance element reaches a pre-determined temperature. The single cut-off device may include stranded wire, a first solder having a first melting point connecting the stranded wire to the at least one non-linear resistance element, and a second solder having a second melting point, higher than the first melting point, connecting the stranded wire to the at least one non-linear resistance element. The single cut-off device may further include a shifting part that shifts when the at least one non-linear resistance element heats the first solder to the first melting point.

Abstract: A metal oxide varistor with heat protection has a body, an insulated washer, a first lead, a second lead and a thermal fuse. The body has two sides and two contacts respectively on the sides. The insulated washer is attached to one contact and has a through hole. The first lead is mounted on the other contact. The second lead is mounted on the insulated washer. The thermal fuse is mounted on the insulated washer and electrically connects to the second lead and the second contact. When the body overloads and overheats, the thermal fuse causes the circuit to open quickly, and the insulated washer keeps the thermal fuse from electrically connecting to the second contact again.

Abstract: An electric component includes a first base body that connects to a first contact, and an ally conducting element positioned along a current path between the first contact and a second contact. The electrically conducting element melts when an operating voltage of the electric component is exceeded. The electric component also includes an electrically insulating material that substantially surrounds the electrically conducting element and that is arranged so as to prevent an electric flashover between regions of the current path that are bridged by the electrically conducting element.

Abstract: A metal oxide varistor with heat protection has a body, an insulated washer, a first lead, a second lead and a thermal fuse. The body has two sides and two contacts respectively on the sides. The insulated washer is attached to one contact and has a through hole. The first lead is mounted on the other contact. The second lead is mounted on the insulated washer. The thermal fuse is mounted on the insulated washer and electrically connects to the second lead and the second contact. When the body overloads and overheats, the thermal fuse causes the circuit to open quickly, and the insulated washer keeps the thermal fuse from electrically connecting to the second contact again.

Abstract: A metal oxide varistor integrally formed with a heat protection structure that will automatically go to open circuit in conditions of overheating due to sustained over-voltages. The metal oxide varistor integrally formed with a heat protection structure has a body, an insulation bracket, a number of terminals and a fuse. The insulation bracket is deposited on the body and has a number of slots. The fuse connects to the body and one of the terminals. The fuse is mounted one of the slots of the insulation bracket. The fuse reacts to the overheating timely and the melting fuse spreads quickly with the assistance of capillary action evolved by the slots of the insulation bracket to speed up the action to go to open circuit in against damage due to sustained over-voltages.

Abstract: A fuse holder having at least two separate electrical paths may include a first hollow support containing a first fuse and a second hollow support containing a second fuse. The first hollow support may have first electrical connection devices, and the second hollow support may have second electrical connection devices. A support member may be coupled to the first hollow support and to the second hollow support. The support member, the first hollow support, and the second hollow support may be made of a non-conductive material.

Abstract: An electric component includes a first base body that connects to a first contact, and an ally conducting element positioned along a current path between the first contact and a second contact. The electrically conducting element melts when an operating voltage of the electric component is exceeded. The electric component also includes an electrically insulating material that substantially surrounds the electrically conducting element and that is arranged so as to prevent an electric flashover between regions of the current path that are bridged by the electrically conducting element.

Abstract: An improved spool assembly for non-explosive actuators used in electro-mechanical structural separation devices. The spool assembly includes two spool halves each having external surfaces and a generally flat internal surface, a unitary and integral internal member made of an electrically conductive material and having a link-wire portion and two electrical terminal portions, and an external wrap-wire wound around the two spool halves and having a connecting end connected to the link-wire portion of the unitary and integral internal member such that the wrap-wire tightly binds the two spool halves together to form a spool for retaining an external structural member.

Abstract: A varistor has a thermal fuse between a lead and an electrode. The fuse includes a link extending between the surface of an insulator and the fused electrode. The electrical connection of the link and the electrode is maintained by a low temperature solder fillet. That part of the link between the electrode and the insulator is surrounded by hot melt electrically insulating material. Upon sustained over-voltage conditions, the link and the solder fillet melt, and an insulating gap is rapidly created by molten hot melt material.

Abstract: Split spool release apparatus for retaining and deploying a deployable appendage. Exemplary apparatus comprises a housing which houses a split spool clamping device, a release nut attached to the deployable appendage, a locking mechanism or fuse assembly, and an actuator. The split spool clamping device comprises a plurality of separable sections that secure the release nut and deployable appendage using the restraining wire that is wrapped around them. In one embodiment, the split spool clamping device may comprises a threaded split-nut. The restraining wire is preferably wrapped using variable pretension, having low tension at the fuse end and higher tension at the nut end (load application end). The fuse assembly is coupled to the restraining wire at a location that is distal from the deployable appendage, and is activated by the actuator to release the restraining wire.

Abstract: The invention relates to a fuse having an input connection (1), an output connection (2) and two parallel current paths which connect both connections to one another. The current paths are namely a main current path (3) and a partial current path. The electric fuse comprises a single fuse element (5) arranged in the main current path (3). In addition, a switch (6) which is arranged inthe partial current path is provided. The switch (6) is configured in such a way that it opens when given limiting values are exceeded, said limiting values pertaining to the current flowing through the fuse and/or to the temperture of the fuse element.

Abstract: The breaker apparatus is disclosed which comprises a projecting wall standing upright from the base of a breaker body; a pair of plate-shaped fixed electrodes laid on the front and back surfaces of the projecting wall; a recessed plug to be fitted on the projecting wall; a U-shaped movable electrode to be stored in the plug for bringing the both fixed electrodes into conduction by clamping the projecting wall on the front and back surfaces thereof; a fuse storage section for storing a fuse connected to one of the fixed electrodes in the surrounding wall standing upright from the base in parallel with the projecting wall; a cover for covering the opening of the fuse storage section and being fittable to the surrounding wall; an engaging surface formed on the plug and facing in the fitting direction of the plug; and a cover motion stopper provided on the cover for engaging with the engaging surface of the plug with the plug fitted to the projecting wall.

Abstract: A layer of thermal fusible material is placed on one surface of a metal oxide varistor (MOV) to monitor the heating of the MOV due to applied voltage spikes. The thermal fusible material is part of the electrical circuit which includes the MOV and melts at a predetermined temperature. In the presence of a severe or a number of voltage spikes the MOV heats up and the heat transferred to the thermal fusible material causes it to open the electrical circuit to the MOV to prevent overheating and thermal runaway. In another form, the MOV is separated into two halves and the thermal fusible material layer is placed between the ends of the MOV halves.

Abstract: The response time of a melting fuse is controlled or influenced by temporarily boosting a threshold level from a first constant value (I.sub.1) to a second dynamic value (I.sub.2) which is then caused to decay in a controlled manner during a fixed time between (t.sub.1) and (t.sub.2) and in accordance with a selectable decay function. If a current (m) flowing through the fuse exceeds the decaying threshold value a fuse blowing current is generated and supplied to the fuse, whereby the fuse blows sooner than it would have, if the excess current had prevailed for a long enough time between (t.sub.1) and (t.sub.X). On the other hand, the fuse does not blow in response to short duration transient excess currents that occur, for example at starting an engine. The engine start impulse which may be used to temporarily raise the threshold value from (I.sub.1) to (I.sub.2) and then cause said controlled decay.

Abstract: An electrical socket device includes a base member formed with an open top side for access to a mounting chamber. Two conductive prong engaging members are mounted on the base member inside the mounting chamber, and are formed with prong engaging portions. One of the prong engaging members is further formed with a first fuse contact. A conductive fuse contacting member is mounted on the base member inside the mounting chamber, and has a second fuse contact aligned with and spaced apart from the first fuse contact. A thermal fuse has first and second fuse terminals held removably by the fuse contacts. A cover member is mounted on the base member to cover the top side of the base member, and includes a plug engaging portion formed with prong inserting slots aligned with the prong engaging portions, and a fuse locating portion formed with an access opening for exposing the fuse contacts.

Abstract: A highly reliable release apparatus which is used to stow or release desired devices such as, for example, solar arrays, antenna positioning mechanisms, reflectors, found on satellites, space stations or spacecraft. Deployment of the desired device is prevented or allowed by respectively restraining or releasing a first member under tension. The apparatus comprises a support member having an opening and a first face arranged about the opening. A second member is located within the opening when the first member is in tension and is adapted to be attached to an end of the first member. At least three locking members such as fuse wires are arranged on the first face of said support member for restraining the second member within the opening in order to maintain tension on the first member. The second member is attached to the first member in a manner such that at least two of the fuse wires must be severed before the restraint on the second member is released.

Abstract: A current-limiting switch, with current connections and contacts, at least one of which is movable, having an associated drive, for opening the moving contact when a predefined electric current intensity is exceeded, are provided. The drive is a thermoelectric drive where a disk-shaped resistor body is present, in a closed housing made of insulating material, for high-intensity discharges, plurality of resistor bodies and associated electrode disks, acting as contacts, are connected electrically in parallel and mechanically in series in the housing made of an insulating material (1). This results in increased switching capacity with compact design.

Abstract: A dual-functional fuse unit, which is responsive to an electric current and an ambient temperature, contains a current sensing fuse and a temperature sensing fuse element. The current sensing fuse is serially connected with and between lead terminals of the fuse unit directly or through an intermediate conductor member. The current sensing fuse or the intermediate conductor member is urged but kept from moving when the temperature sensing fuse element is in a solid state. When the fuse element melts at a specified ambient temperature the urged current sensing fuse or the intermediate conductor member is displaced by the urging force so that the lead terminals are electrically disconnected from each other. In other embodiment, an urged cutter member in the case is normally kept from moving but is driven to sever the element of the current temperature fuse when the temperature sensing fuse element melts at a specified ambient temperature.

Abstract: A fused battery terminal has a stamped and formed terminal member an insulative housing integrally molded over power supply line connection bolts, and a battery post mounting member attached to the terminal member. The terminal member is rigidly attached to the insulative support member thereby providing a safe and rigid support for a fuse link which is integral with the terminal member. Power supply lines can thus be clamped against connection platforms of the terminal member by the bolt and are thus directly connected to the battery post via the fuse link. Safety and reliability of the fuse connection between the battery and power supply line are thus enhanced due to the integral forming of the fuse line onto the battery post connection section.

Abstract: A controller (24) is provided to selectively release an initiator (12) having first and second members (14,16) that clampingly engage an object (18) preventing it from moving in an urged direction. A spring wire coil (20) holds the members (14,16) tightly about the object, one coil end affixed to one of the members and the other coil end is held by a pair of link wire loops (82,86) of the controller (24) which is also removably secured to one of the members (14,16) by a bolt (36). When it is desired to release the object (18) an electric current is passed through the link wire loops (82,86) of sufficient magnitude to cause the loops to break, releasing the coil (20) to unwind and, in turn, release the object for urged movement.

Abstract: A bimetallic reed for a circuit protecting device includes an integral fusible portion as a failsafe interrupting mechanism. The bimetallic reed includes a body of electrical conductive materials and having a first end mountable to a terminal and a second end forming an interruptible contact portion. The body is shaped to deform at a central portion of the body when the body is heated to a predetermined temperature. The body includes a plurality of apertures adjacent to the contact portion defining a plurality of electrical conductive pathways connecting the central portion and the contact portion, wherein the plurality of conductive pathways is fusibly responsive to a predetermine electrical load condition to form a fusible link.

Abstract: A link wire (20) arrangement for use in a non-explosive initiator (10) includes a link wire (20) received within a pair of tubes (24,26), each tube having its outer end formed into a loop (28) and its opposite end crimped (30) to physically and electrically secure the tubes to the included link wire (20). The tubes (24,26) are encapsulated within an insulating body (16).

Abstract: A thermal cut-off resistor that has an elongated thermal cut-off fuse; a wire-shaped resistor that is tightly coiled around the fuse, said resistor being physically connected to the fuse so that the fuse and the resistor are in an electrical series arrangement; and an electrically-insulated heat-resistant casing that contains the fuse and resistor therein and enables the fuse and the resistor to be secured and electrically connected to respective electrical contacts formed on a printed circuit board, the profile of the casing being approximately the width of the fuse.

Abstract: A combined magnetic and thermal activated relay for use in alarm systems. The relay includes a thermal activated bimetal switch in series with the current through the magnetic coil which activates a magnetic switch. The thermal switch is in a normally closed state and the magnetic switch is in a normally open state. When current passes through the coil the magnetic switch changes from its normally open to a closed state applying voltage potential for an external requirement. The heat generated by the coil's resistance to current flow heats the core of the magnetic coil, and after reaching an elevated temperature level the thermal activated switch changes from its normally closed state to an open state opening the current flow path through the magnetic coil causing the magnetic switch to return to its normal open state removing voltage for the external requirement. The switching operation of the thermal switch cycles with temperature changes.

Abstract: There is provided a current limiting fuse having a uniform and supported element with arc voltage controlling and shaping capabilities that can withstand high mechanical and electrical stress.

Abstract: There is provided a current limiting fuse having an electrically parallel connected non-linear resistor element for limiting and shaping the arc voltage developed during current interruption.

Abstract: There is provided by this invention a current limiting fuse having a zinc oxide core electrically connected in parallel with an array of wire fuse elements capable of shaping and controlling the arc voltage developed during current interruptions.

Abstract: A bimetallic disc actuated thermostatic switch with thermal override comprises a base, a fixed contact on the base, a movable contact and a bimetallic disc which moves the movable contact into and out of engagement with the fixed contact to effect or interrupt continuity therebetween. A thermal override pellet which melts or deforms in response to an excessive temperature is provided in a cavity in the base and the fixed contact is mounted on a resilient arm which overlies the pellet. When an excessive temperature is reached, the pellet fuses or deforms and the fixed contact arm and the fixed contact move toward the base to separate the fixed and movable contacts even when the latter is in its normally engaged position.

Abstract: The present invention discloses an electric safety device in which a fuse element adapted to break a circuit upon passage of an overcurrent and a circuit-breaking conductive member of the heat-sensitive type for preventing overheat are housed in one vessel and are electrically connected to each other, so that the circuit of an electrical appliance can be broken with respect to both overcurrent and overheat.

Abstract: A high voltage switch having a snap-action switching mechanism for effecting opening and closing of relatively movable switch contacts, and having mechanical time delay trip release mechanism operatively associated with the switching mechanism to effect a selected time delayed opening of the switch contacts in response to a predetermined event such as a current overload. The time delay trip release may also be manually actuated to open the switch contacts from a closed condition.

Abstract: A disc type thermistor has a low melting point metal rod disposed between the thermistor and a metal spring. The spring places the rod in compressive contact with one surface of the thermistor. When the thermistor overheats, the rod melts and opens the circuit.

Abstract: A protective circuit for a heating element in a polymeric resinous tub dishwasher including an electric-type resistance heating element and a heat-sensible, dual-functioning switch. The switch is connected in the ground circuit so that current passing to ground will cause a fusible link to melt and thereby open the ground circuit. At the same time, melting of the link allows a switch in the power circuit to open, thereby eliminating any power to the heating element.