Abstract: A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism including an electromagnetic coil is operable to move the switchable contact to an open position in response to a predetermined electrical condition when the fuse is engaged and when the switchable contact is in the closed position.

Abstract: A chip-type fuse includes a main body portion composed of an insulating material, a fuse conductor that is disposed inside the main body portion and that has both end portions exposed at the main body portion, and a pair of outer electrodes that cover respective end portions of the main body portion and that are connected to respective end portions of the fuse conductor. A hollow portion is present inside the main body portion, and the fuse conductor has a fusing portion disposed along the wall surface of the hollow portion.

Abstract: A high current fusible disconnect switch device includes a switch housing configured to receive a pluggable touch-safe fuse module, and a dual slide bar actuator assembly for opening and closing switch contacts. The dual slide bar elements are each coupled to bias elements that store and release energy to affect switch opening and closing operations. The switch opening and closing operation is multi-staged wherein the only the first slider element is movable in the first stage, and both the first and second slider elements are movable in the second stage.

Abstract: This breaker panel comprises a plurality of circuit breakers, each circuit breaker having a head comprising a frustroconical seal made of an elastomer, this frustroconical seal having a first frustroconical face; and a conic frustum made of a material that is harder than the material of the frustroconical seal, this conic frustum having a second frustroconical face; in which: the distance, in a plug-in direction, between an upper edge of the first frustroconical face and the shoulder is at least two times smaller than the distance, in the plug-in direction, between the upper and lower edges of the second frustroconical face; and the upper edge of the first frustroconical face is set back, towards the interior of the circuit breaker, relative to the lower edge of the second frustroconical face.

Abstract: A pressure resistant housing for an electric component is provided. The pressure resistant housing is adapted for the use in a subsea application. A ceramic housing body houses the electric component. The ceramic housing body has a first opening and a second opening that are closed by a first metal lid and a second metal lid, respectively.

Abstract: A normally closed electric switch having a sliding assembly that is actuated to open the switch, e.g. by a pyrotechnic gas generator. Prior to actuation, a conductive portion of the sliding assembly (21) is in tight contact with two rings (13a, 14a) that are axially offset on the same axis, belonging respectively to two electrically conductive tabs (13, 14), and after the actuator has been triggered, the upstream tab (13) is separated from the conductive portion of the sliding assembly. According to the invention, sliding assembly comprises a tube split by a slot extending along its entire length, and the conductive portion of the sliding assembly is constituted by all or part of said split tube, the clamping force between the conductive portion and the primary electrically conductive tabs being provided by the resilience of the split tube.

Abstract: A lockout and tagging device and assembly for a switchable energy isolation device such as a terminal block are provided. The lockout and tagging device includes a base member configured to support a tag and a male member extending from the base member and including a retaining portion complementary to a female receptacle of the isolation device to retain the male member in a female receptacle after insertion of the male member into the female receptacle. The lockout and tagging device also includes a blocking member extending from the base member. The blocking member positively blocks an actuator of the isolation device from moving and switching the isolation device into its non-isolating state when the male member is retained in the female receptacle. A circuit coupled to the isolation device is positively de-energized when the actuator is blocked in the isolating state.

Abstract: A device for holding an electric fuse assembly having a fuse carried by a first end fuse holder and a second end fuse holder. The assembly includes a first housing section having a cavity formed therein for receiving the first end fuse holder and a second housing section having a cavity formed therein for receiving the second end fuse holder. An end of the second housing section is adapted to be separably coupled with an end of the first housing section by placing an interior surface at the end of the first housing section into overlapping engagement with an exterior surface of the second end fuse holder and an interior surface of the second end fuse holder into overlapping engagement with an exterior surface at the end of the first housing section. Such a coupling functions to provide a moisture resistant seal.

Abstract: Armoured resistor with an end sealing element in which the electric pin (2) partially projecting from an end (1?) of the armour (1) and connected to said end by said sealing element (5) is provided with a part (22) with high roughness, i.e. knurling and/or toothing (22?, 22?, 22??) and/or a circular groove (23, 23?), moreover said end (1?) of the armour is crimped in order to compress said sealing element (5) against said zone with high roughness.

Abstract: An improved fuse including a fuse body formed of an electrically insulative material. The fuse body defines a cavity which extends from a first end of the fuse body to a second end of the fuse body. A fusible element is disposed within the cavity and extends from a first end face of the first end of the fuse body to a second end face of the second end of the fuse body. Insulated plugs are disposed within the cavity at the first and second ends of the fuse body wherein the plugs adhere to an interior surface of the fuse body and form seals that close the internal cavity. The fuse may further include end terminations that are applied to the ends of the fuse body in electrical contact with the fusible element.

Abstract: An improved fuse including a fuse body, a fusible element, end terminations and insulated plugs used to seal a cavity formed within the fuse body to extinguish electrical arcs when an overcurrent condition occurs.

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: An assembly in which a housing and cover enclose an electric component and lock the electric component into place is provided. The electric component has two L-shaped terminals with notches formed in them that provide lock surfaces for the housing body. The housing body has locking arms that flex during installation and lock the electric component into place by mating with the lock surfaces. The cover body has bosses which push down upon the electric component during installation and lock pins which lock the flexible locking arms into place. The lock pins occupy the space between the locking arms and the backstops of the housing body thereby preventing the locking arms from moving out of position and disengaging the lock surfaces of the locking arms and terminals.

Abstract: A high voltage service disconnect assembly is provided. The high voltage service disconnect assembly is configured to fixedly hold a plurality of different sized fuses therein having different current rating capabilities, one fuse at a time.

Abstract: Embodiments for an in-line fuse holder each include at least one housing and two mating pieces, which can snap-fit together and be held moveably together via a strap. Each embodiment houses at least one fuse, such as an automotive fuse. In one example, the fuse includes a first housing forming a first cavity, which is configured to house a first portion of the fuse. The first housing also includes a projection having sides that taper outwardly as the sides extend away from the first housing. The fuse holder also includes a second housing forming a second cavity, which is configured to house a second portion of the fuse. The second housing includes a channel having sides that taper outwardly as the sides extend into the second housing. The projection and channel snap-fit together in a water resistant relationship.

Abstract: The present invention relates to a switch disconnector comprising a housing portion, in which several pairs of blade receiving contacts assigned to each other or the like are arranged, which can be bridged by means of fuses, possibly comprising shock protection covers at least partially covering contact blades, and comprising a lid for receiving said fuses, which is provided in a manner hinged to the housing portion, wherein several receiving means in the form of slots, grooves or the like are formed at the inside of the lid, wherein one bearing cage is provided per fuse, and each bearing cage comprises a cage portion for inserting a fuse, wherein the cage portion is fit to the shape of the fuse to be inserted, and each bearing cage is provided with fasteners, which can be inserted in and snapped into predetermined receiving means for fastening the bearing cage to the lid respectively.

Abstract: A power-circuit breaking device, which can easily mount a fuse and has a small number of component and a simple structure. The power-circuit breaking device includes a first connector housing having a pair of circuit terminals connected with a power circuit, and a second connector housing closing the power circuit by fitting with the first connector housing. The second connector housing includes a fuse having a pair of terminals to be connected with the pair of circuit terminals, a housing having a lock arm engaged with a cutout provided at the terminal and a cover an entry opening of a receiving section of the housing. The cover includes a limiter limiting the lock arm to move to disengaging the terminal.

Abstract: A service disconnect assembly for an electronic module includes a fuse carrier having a holder configured to hold a fuse for the electronic module, where the fuse carrier has an attachment finger extending from the holder. The attachment finger has a peg. The service disconnect assembly also includes a service disconnect cover having a hood forming a channel, with the hood having a window exposing a portion of the channel. The attachment finger is received in the channel to couple the fuse carrier to the service disconnect cover. The service disconnect cover is slidable with respect to the fuse carrier between an initial position and a final position, wherein the hood moves with respect to the attachment finger as the service disconnect cover is moved between the initial and final positions. The peg is aligned with the window in the final position. A handle is rotatably coupled to the service disconnect cover and the handle has a catch aligned with the window.

Abstract: A breaker switch includes a connector housing having plug-in contacts and a socket housing having sockets. The connector housing has a fuse chamber having an opening through which a fuse can be inserted into the fuse chamber. A lever pivotably mounts the housings such that the connector housing is movable with the lever relative to the socket housing between starting and final positions. In the starting position the housings disengage such that the contacts and sockets disengage. In the final position the housings engage such that the contacts and sockets engage. A cover is movably connected to the connector housing to move between opened and closed positions. The cover opens the fuse chamber opening when opened and closes the fuse chamber opening when closed. When the cover is opened the cover prevents the connector housing from moving to the final position thereby preventing the contacts and sockets from electrically connecting.

Abstract: Embodiments for an in-line fuse holder each include at least one housing and two mating pieces, which can snap-fit together and be held moveably together via a strap. Each embodiment houses at least one fuse, such as an automotive fuse. In one example, the fuse includes a first housing forming a first cavity, which is configured to house a first portion of the fuse. The first housing also includes a projection having sides that taper outwardly as the sides extend away from the first housing. The fuse holder also includes a second housing forming a second cavity, which is configured to house a second portion of the fuse. The second housing includes a channel having sides that taper outwardly as the sides extend into the second housing. The projection and channel snap-fit together in a water resistant relationship.

Abstract: A breaker switch includes a connector housing having plug-in contacts and a socket housing having sockets. The connector housing has a fuse chamber having an opening through which a fuse can be inserted into the fuse chamber. A lever pivotably mounts the housings such that the connector housing is movable with the lever relative to the socket housing between starting and final positions. In the starting position the housings disengage such that the contacts and sockets disengage. In the final position the housings engage such that the contacts and sockets engage. A cover is movably connected to the connector housing to move between opened and closed positions. The cover opens the fuse chamber opening when opened and closes the fuse chamber opening when closed. When the cover is opened the cover prevents the connector housing from moving to the final position thereby preventing the contacts and sockets from electrically connecting.

Abstract: For providing a power-circuit breaking device, which can easily mount a fuse and has a small number of component and a simple structure, the power-circuit breaking device includes a first connector housing having a pair of circuit terminals connected with a power circuit, and a second connector housing closing the power circuit by fitting with the first connector housing. The second connector housing includes a fuse having a pair of terminals to be connected with the pair of circuit terminals, a housing having a lock arm engaged with a cutout provided at the terminal and a cover an entry opening of a receiving section of the housing. The cover includes a limiter limiting the lock arm to move to disengaging the terminal.

Abstract: Embodiments for an in-line fuse holder each include at least one housing and two mating pieces, which can snap-fit together and be held moveably together via a strap. Each embodiment houses at least one fuse, such as an automotive fuse. In one example, the fuse includes a first housing forming a first cavity, which is configured to house a first portion of the fuse. The first housing also includes a projection having sides that taper outwardly as the sides extend away from the first housing. The fuse holder also includes a second housing forming a second cavity, which is configured to house a second portion of the fuse. The second housing includes a channel having sides that taper outwardly as the sides extend into the second housing. The projection and channel snap-fit together in a water resistant relationship.

Abstract: A housing body contains the fuse body therein. The fuse body is formed with an opening and a retaining projection arranged in the vicinity of the opening. A cover body is formed with a locking piece adapted to engage with the retaining projection so that the cover body closes the opening. A rigidity-reduced portion is formed in the cover body, so that the cover body can be flexed substantially without flexing the locking piece, at least when the locking piece engages with the retaining projection.

Abstract: A unitary bracket particularly suited for mounting a thermal protector to a ballast for an electrical lighting fixture. The unitary bracket has a holding-face portion with opposite edges and a mounting end, edge portions on the opposite edges angled toward the electrical device, and a mounting-end portion on the mounting end and extending toward the electrical device, the mounting-end portion having a mounting tab for engagement with the electrical device, the portions being configured and dimensioned to sandwich the thermal protector against the electrical device when the mounting-end portion is secured thereto. An improved thermally-protected ballast includes the bracket.

Abstract: A fuse housing assembly is disclosed that includes a rate release plug that prevents the emission of large quantities of dielectric oil from a transformer tank upon removal of a fuse holder from a bayonet-type fuse holder. The rate release plug allows pressurized gas inside the tank to escape while at the same time, impeding the flow of dielectric oil out of the tank.

Abstract: A fuse housing assembly having a fuse holder housing for receiving a fuse holder. The fuse housing is mountable to a transformer tank that holds a dielectric liquid. When the fuse holder and fuse are inserted into the fuse housing that is mounted to the transformer tank, the fuse is located under the dielectric oil. The fuse holder assembly includes a vent tube that communicates a gas above the level of the dielectric liquid in the transformer to the interior of the fuse holder housing. When an operator removes the fuse holder to replace an exhausted fuse, a seal formed between the fuse holder and the fuse holder assembly is broken, and pressurized gas within the transformer tank will vent through the vent tube, through the interior of the fuse holder housing, and out an open end of the fuse holder housing to atmosphere, rather than causing the dielectric liquid to flow out of the fuse holder housing.

Abstract: A microwave oven comprises a main body, a cooking chamber and an electrical component compartment. The electrical component compartment contains a fuse housing which is mounted on a bracket to hold a fuse. Plastic coupling members are integrally mounted onto the fuse housing bracket, into which a fuse is inserted. Each coupling member includes a guide projecting integrally upwardly from the bracket. Both sides of the fuse housing contact respective ones of the guides. A protruding portion on the top of each guide forms a cam surface for spreading the guides apart, and a stop surface for preventing upward dislodgement of the fuse housing.

Abstract: A cartridge fuse mounting structure including a fuse holder, a cartridge fuse mounted inside the fuse holder, two cylindrical fuse connectors respectively connected to two opposite ends of the cartridge fuse, two electric wires respectively connected to the cylindrical fuse connectors by a respective wire binding clamp, and two end caps respectively mounted around the electric wires and respectively fastened to two opposite ends of the fuse holder, wherein each cylindrical fuse connector has an inside annular groove, which receives one end of the cartridge fuse, a split coupling tube at one end clamped on one end of the cartridge fuse, and a radial screw hole at an opposite end mounted with a tightening up screw, which holds down the respective wire binding clamp and the respective electric wire.

Abstract: A fuse holder (2) for use in electrical apparatus includes a tubular body (6) having outer and inner ends (10, 16). A first electrical contact element (22) and a mounting flange (8) are secured to the inner and outer ends, preferably using resilient retaining rings (53, 68) engaging circular grooves (52, 20; 62, 20) formed in the opposed surfaces. A tubular second electrical contact element (32) is secured within the tubular body and preferably has a flexible electrical terminal strap (24) which extends out through an opening (23) formed in the tubular body. Fluid-tight seals are provided between the inner surface (14) of the tubular body and the outer surfaces (46, 58, 30) of the first and second electrical contact elements and the mounting flange assembly by using pairs of O-rings (38, 50 and 70); an adhesive (39) is also used to secure these elements to the body.

Abstract: A fuse housing for an oil-cooled transformer that uses a stopper to prevent oil from escaping the transformer tank as the fuse and fuse holder are removed. During normal operation, the stopper is held in an open position by the fuse holder. When the fuse and fuse holder are removed, the stopper closes and seals the upper end of the holder, preventing oil from draining through the upper portion of the fuse housing and escaping from the transformer tank.

Abstract: A current limiting oil immersible fuse including a tubular housing having a resilient elastomeric cap sealed to each end of the housing, an end cap independently mounted on each end of the housing and overlying the resilient elastomeric cap and a fuse assembly supported in the housing by the end caps.

Abstract: A fuse holder assembly for a cylindrical fuse of the type including a fusible link retained in an insulative sleeve. The assembly includes first and second insulated conductors, first and second metallic terminal elements for attachment to the end of the conductors and including a receiving end for holding one end of the fuse. The assembly further includes first and second sleeves of resilient insulative material for receiving corresponding conductors in an interference fit with each sleeve being slidable along the outside surface of the conductor. A first cap of relatively rigid insulative material includes a barrel defining a cavity for receiving the first terminal element with the cap having a facing end portion and a remote end portion. The cap includes an intermediate internal ledge positioned between the end portions for abutting the fuse-receiving end of the terminal element, and a remote internal ledge positioned at the remote end portion of the cap for abutting a sleeve.

Abstract: A miniature cartridge-type fuse comprises a sub-assembly of an inner insulating housing made of a transparent glass or glass-like material which cannot withstand the forces of a short circuit overload, and end cap terminals at the ends of the housing. A transparent encapsulating body is preferably molded immovably around the inner housing and covers, seals and physically interconnects the exposed exterior surfaces of the inner housing and terminals. The encapsulating body prevents the hazardous destruction of the fuse under all overload conditions and enables the fuse element to be seen through the encapsulation body and inner housing.

Abstract: An improved electrical fuse having axial leads (5) and comprising a fuse wire in a cylindrical sleeve (2) supported at its ends by lead carrying end caps (3) is coated over the length of the fuse body by an insulating layer of thermo-plastic (7). Improved humidity resistance and mechanical strength are achieved and control of coating thickness is improved. Use of hot plastic for the insulating layer (7) reflows solder joint (4) reducing instances of open or high resistance fuses which must be rejected. Also, the I.sup.2 t performance is significantly improved over other adherent coatings.

Abstract: A moisture and waterproof seal for a fuse is provided while allowing selectively for fuse visibility enhancing non-breakability, and improved resistance against moisture ingress. The fuse holder includes flexible molded members which are formed with lips towards the ends remote to the fuse ends thereby allowing the lips to engage and envelope the fuse sealing against moisture. A cuff and groove formation leading the lips provides enhanced sealing of the molded parts. The members can be moved between a position exposing the fuse for visibility and the sealing position enclosing the fuse against breakage. Internal to the molded members are yieldable clips for engaging the end ferrules of the fuse.

Abstract: A system for sensing or detecting changes in and accumulating data relating to variable quantities or conditions, for example temperature, is disclosed. In one instance, the system sensor is a mercury tube thermometer modified with conductors or contacts embedded in the glass walls of the mercury tube. As the temperature rises, the conductive material rises and performs a switching function with the embedded contacts closing an electrical circuit to which the contacts are connected. The circuit components include plurality of logic gates the inputs of which are connected to the switching contacts in a manner such that their outputs are singularly true in a sequence corresponding to the direction of temperature change. In another instance the sensor is a bimetallic strip, coil or thermal Bourdon tube and an arm or pointer needle mounted on an end of the strip or tube rotates in response to changes in the temperature being sensed.

Abstract: A combination fuse injector and ejector for cartridge type fuses includes a molded plastic open top receptacle, or shroud, having protective peripheral walls, a bottom wall and a hinged cover. The bottom wall includes an opening adjacent each end of the receptacle through which conventional fuse holding contact clips rigidly attached to a mounting surface can enter the receptacle. The bottom wall includes an integral external pedestal which provides a loosely coupled captive mounting for the receptacle on the mounting surface. The bottom wall of the shroud also includes a fuse-ejecting internal surface extending between the pair of contact clips whereby the fuse may be ejected from the clips by a lifting of the shroud on its loosely captive pedestal. The cover includes an integral class for lightly gripping the fuse to retain it during the ejection operation and to accept a replacement fuse for injection into the clips.

Abstract: A dry well fuseholder for use with electrical apparatus containing a dielectric liquid. The holder has an outer, liquid-tight, tubular shell and a number of components inside the shell abutting coaxially in the following order: an annular fitting adapted for supporting the fuseholder on the apparatus; an insulating tube; an annular fuse terminal; another insulating tube; and an annular fuse terminal closed at one end. Glass fibers bonded together with epoxy resin are wound over the peripheral surface of the fitting-tube assembly to produce the shell. Seals are located between the fittings and shell near the joints of fittings and tubes. These seals are composed of a material which swells on contact with the dielectric liquid.

Abstract: A current limiting fuse especially adapted for installation within the oil tank of a transformer for protecting the latter from the effects of high magnitude fault currents is provided which is completely fluid-submersible and capable of withstanding severe thermal cycling without damage to the fluid-tight seals thereof. In addition, the fuses hereof are especially constructed for permitting quick, individual helium testing thereof in order to ensure that the fuses meet required safety standards. The main body of the fuse is encapsulated within a fluid-impervious casing of filled epoxy material which is penetrated by a pair of opposed, end-mounted, electrically conductive terminals each being threadably connected to the body of the fuse and bearing against a respective resilient seal member to form fluid-tight seals between the opposed terminals and the apertured ends of the encapsulating casing.

Abstract: A fuse holder for a transformer comprising a generally tubular housing secured at one end to the transformer end wall and enclosing the fuse. A tapered resilient adapter sleeve is disposed within the outer end of the housing and carries a bushing well for a high voltage line adapter. The adapter sleeve seals the housing interior. An annular clamp secured to the transformer wall holds the adapter sleeve and fuse holder housing in place. The inner end of the air type fuse is connected to the transformer primary winding by a helical coil spring compressed between a projection on the fuse and a stainless steel tube. The fuse and bushing well are removable by detaching a clamp ring on the outside of the transformer and slipping the parts out through the adapter sleeve and housing. The construction permits immersion of the air type fuse and insures isolation and de-energization of the internal transformer parts upon opening of the fuse.

Abstract: An interlocking safety arrangement for electrically powered apparatus utilizes a conventional disengagable electrical connector and a standard fuse holder which are physically arranged so that the connector must be disengaged from its receptacle to gain access to the fuse holder. Since the electrical connector supplies power to the apparatus, disengagement disconnects the power and prevents the possibility of an electrical shock hazard from the terminals associated with the fuse.

Abstract: Disclosed is a tool for removing and installing fuses in metal-enclosed switchgear. The switchgear includes one or more fuses and one or more isolating switches and operating mechanisms for isolating the fuses from a high voltage supply circuit. The fuses are mounted between disengageable contacts that connect the fuse between the supply circuit and a load circuit. Access ports are provided through a front panel of the switchgear and are aligned with the fuses for providing access to the fuses. A tool receiving receptacle is mounted on the front panel around the access ports. The tool comprises a hollow metal housing having a hollow interior and having a flange on one end for being received and retained by the receptacle. The receptacle aligns the hollow interior of the metal housing with the access port, and makes grounding connection from the housing to the front panel. The tool also comprises an operating portion including a handle mounted on one end of an insulator.