Prong Or Blade (e.g., Plug-type Housing) Patents (Class 337/198)
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Patent number: 5598138Abstract: A fault-indicating blade fuse includes a light-emitting electrical device that is positioned for ready visibility from above the fuse. The device lies within the bounds of the upper body profile of the fuse, and is so constructed and connected as to be activated upon fusion of the link, when the fuse is subjected to excessive current. In one form, a supplemental component contains a light-emitting electrical device and includes means for affixing it to the upper body portion of a fuse. Contact elements on the supplemental component establish electrical contact with the blades of the assembled fuse.Type: GrantFiled: January 3, 1995Date of Patent: January 28, 1997Inventor: Joseph P. Jaronczyk, Jr.
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Patent number: 5489885Abstract: An automotive fuse inserting and attaching apparatus that has an aligning portion for aligning automotive fuses to be inserted and attached into a fuse box. The aligned automotive fuses are aligned in the same arrangement they assume when inserted and attached within the fuse box. The automotive fuse inserting and attaching apparatus includes a feeding portion for feeding predetermined automotive fuses to the aligning portion. The automotive fuse inserting and attaching apparatus further includes a hand-type inserting and attaching portion that is separable from the feeding portion, for inserting and attaching a group of automotive fuses into the fuse box by conveyably clamping with one hand the group of automotive fuses aligned by the aligning portion.Type: GrantFiled: June 6, 1994Date of Patent: February 6, 1996Assignee: Sumitomo Wiring Systems, Ltd.Inventor: Takashi Saga
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Patent number: 5488346Abstract: A connection terminal includes a pair of connection portions interconnected through a fusion portion, and each of the connection portions is defined by a bottom plate, opposite side plates formed respectively on opposite sides of the bottom plate, and a top plate. A spring portion extending from the top plate is folded back from a front side thereof to be disposed within the connection portion so that a mating connection terminal can be held between the spring portion and the bottom plate. The connection terminal is stamped from an electrically-conductive metal sheet in such a manner that the spring portion extending from the top plate is extended along and disposed generally adjacent to the fusion portion before the spring portion is folded back.Type: GrantFiled: June 21, 1994Date of Patent: January 30, 1996Assignee: Yazaki CorporationInventors: Hiroki Kondo, Mitsuhiko Totsuka, Toshiharu Kudo
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Patent number: 5488345Abstract: A disconnection mechanism for a dark current fuse provides a connecting terminal connecting the dark current fuse, a fuse block body receiving the connecting terminal, and a fuse holder slidably engaged with the fuse block body in a direction of connecting the dark current fuse, the fuse holder provides a cutaway opening exposing a head of the dark current fuse being therein, an engaging projection disposed at an opening edge of the cutaway opening for engaging the head, and a supporting wall portion contacting a trunk of the dark current fuse. The disconnection mechanism is not necessary to store the extracted dark current fuse after a dark current fuse circuit is opened, so that there arises no possibility of missing the extracted dark current fuse, the dark current fuse can be extracted by using a puller, and the dark current fuse is surely held and prevented from slipping off.Type: GrantFiled: July 1, 1994Date of Patent: January 30, 1996Assignee: Yazaki CorporationInventors: Yoshinobu Seki, Kenichiro Kawaguchi, Gen Oozono, Akio Sugiyama, Ryuetsu Oikawa
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Patent number: 5457445Abstract: Disclosed is a safety plug for electrical appliances and mainly includes an upper casing, a lower casing, two pole pins, a cylindrical cartridge fuse and a fuse terminal. The upper casing and the lower casing are slidably and detachably connected with each other by engagement of teeth provided at inner side walls of the upper casing and retaining hooks provided at outer side walls of the lower casing. One of the pole pins is provided at its rear end with an arcuated wrapping conductor to fitly and firmly wrap around a lower half of a first end of the cartridge fuse. The fuse terminal is provided with an .OMEGA.-shaped wrapping conductor to fitly and firmly wrap around a lower half of a second end of the cartridge fuse. These arrangements allow the cartridge fuse to correctly sense the current passing therethrough and the fuse wire in the cartridge fuse to be burned out at overload.Type: GrantFiled: December 13, 1994Date of Patent: October 10, 1995Inventor: Tun L. Su
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Patent number: 5444428Abstract: An integral plastic fuseholder for receiving portions of a pair of in-line electrical conductors which may be connected to a non-fused electrical adapter plug. One conductor of the pair is severed within the holder to form an open connection until the connection is completed by a flat-blade insertion fuse. A pair of female electrical terminals is located within the fuseholder with each terminal connected to a different end of the severed conductor. The fuseholder has a foldable clam-shell housing formed by a pair of foldable cover sections which are joined by a centrally disposed hinge section. The housing is opened to receive the in-line electrical conductor pair, or alternatively is folded to a closed position to retain the in-line conductor pair and to create a partially enclosed cavity which forms a fuse-insert access opening opposite the hinge section. Any inserted fuse is connected in series with the conductor terminals to complete a fused conductor connection to an adapter plug through the fuseholder.Type: GrantFiled: May 19, 1994Date of Patent: August 22, 1995Assignee: SAFCO CorporationInventors: Francis L. Carr, George P. Canell
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Patent number: 5435755Abstract: A multiple bus fuse tube is secured between the conductor tabs of an outlet prong in a plug connector and is urged outwardly by a spring to permit rotation of the tube and sequentially expose a separate connection point of each bus into electrical connection with a conductor tab, thereby permitting a single fuse tube to be utilized several times before replacement.Type: GrantFiled: January 13, 1994Date of Patent: July 25, 1995Inventors: Ming-Chyan Chien, Lai-Sheng Lee
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Patent number: 5281943Abstract: An electrical connector is provided which allows simple and efficient replacement of fuses contained within an electrical connector housing. The electrical connector includes a cover plate which is mounted at an upper section of the electrical connector housing. The cover plate is formed with a pair of separators and a projection extending from a lower surface of the cover plate. The two separators may be inserted between fuses and electrical prongs when the cover plate is prepared for opening. The projection pushes the fuses into contact with the electrical prongs in a firm manner for a good electrical connection when the cover plate is completely closed.Type: GrantFiled: January 22, 1993Date of Patent: January 25, 1994Inventor: Nan-Whair Liao
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Patent number: 5176539Abstract: A safety plug comprising a plastic casing having two separate wire holes for inserting the positive and negative conductors of an electric wire and a chamber on a top edge thereof covered by a cover, said chamber having a first female projection and a second female projection connected by a fuse, said cover having two male projections respectively inserted into holes on said first and second female projections to secure said fuse in place, wherein the positive plug pin is connected to said first female projection, the negative plug pin is directly connected to the negative conductor of said electric wire, and the positive conductor of said electric wire is connected to said second female projection. The fuse is burnt out to cut off the circuit upon overload on the electric wire.Type: GrantFiled: March 18, 1992Date of Patent: January 5, 1993Inventor: Louis Liu
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Patent number: 5136452Abstract: An RC controller includes a circuitboard with a circuit for variably coupling power from a battery to the drive motor of a radio controlled model. The circuit includes braking componentry that produces a low resistance path in parallel with the motor in order to brake the motor under operator control. The braking componentry includes a flyback diode and a semiconductor device connected across the terminals of the drive motor. The flyback diode may be a separate component or a part of the semiconductor device. According to a major aspect of the invention, a fuse is provided in series with the flyback diode to protect it against damage in the event the battery is connected backwards. The fuse is placed to protect the flyback diode without introducing an undesired voltage drop between the battery and the drive motor. Various fuse placements are disclosed. Instead of a separate fuse, one embodiment includes an unfused flyback diode that doubles as a fuse.Type: GrantFiled: January 9, 1992Date of Patent: August 4, 1992Inventor: Kevin R. Orton
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Patent number: 5107387Abstract: A controller includes a circuitboard with a circuit for variably coupling power from a battery to the drive motor of a radio controlled model. The circuit has positive and negative input terminals for connection to the battery and an output port for connection to the motor. The circuit also includes braking componentry that produces a low resistance path in parallel with the motor in order to brake the motor under operator control, and the circuit includes a fuse in series with the braking componentry for protecting it from damage in the event the input terminals are connected to the battery with the polarity reversed. An inventive fuse is disclosed that may be used with the controller or elsewhere. The fuse includes a conductive element of predetermined current rating and first and second connectors connected to the conductive element that are configured to plug onto first and second terminal posts with interference fits so that any component fatigue is substantially restricted to the fuse.Type: GrantFiled: December 5, 1990Date of Patent: April 21, 1992Inventor: Kevin R. Orton
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Patent number: 5002506Abstract: An electrical plug having an additional fuse connecting between the metal prongs in an outlet connected to a power source and the power cord connected to electrical equipment with the fuse having fuse strips along one face of an insulator block and up opposite faces of the insulator block on opposite ends of each of the fuse strips. The insulator block has a threaded hole therethrough aligned with a threaded hole in the bottom of a space or cavity in the plug with a screw threaded through both holes to maintain the insulator block in the space and in tight electrical contact with the tips of wires from the power cord and the edges of the prongs.Type: GrantFiled: March 29, 1990Date of Patent: March 26, 1991Inventor: Peir L. Tsay
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Patent number: 4904976Abstract: A combination plug including an outer housing, an inner housing slidably insertable into the outer housing, a fuse assembly retained within the inner housing, and a snap fitted conductor body fitted within the outer housing. The inner housing includes a pair of prongs which are passable through respective slots of the outer housing and a pair of openings for receiving the prongs of an add-on plug. The fuse assembly includes an H-shaped plastic fuse holder, a pair of fuses held in respective grooves of the plastic fuse holder, and four copper covers, each cover covering a respective terminal of the H-shaped fuse holder and connecting both ends of each fuse. The snap fitted conductor body includes a conductor tap casing, two conducting wires, and two conductor taps. The provision of the copper covers is to provide a larger contact surface between the fuses and the conducting taps of the conductor body and the prongs.Type: GrantFiled: March 21, 1989Date of Patent: February 27, 1990Inventor: Nan W. Liaq
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Patent number: 4834664Abstract: An improved safety end-connector used for extension cord includes: a circuit protection fuse, a detachable fuse box for easy inspection and replacement, two lead-in wires clamped firmly by a tail clamp of a base, a plurality of pairs of socket openings each pair of socket openings protected by a shutter slide, and an indicator lamp furnished for indicating the receptacle during night time or in a dark place, or serving as a trouble indicator.Type: GrantFiled: December 11, 1987Date of Patent: May 30, 1989Inventor: Mei-Mei Lin
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Patent number: 4759730Abstract: A fuseholder assembly includes a two pole fuseholder having load side and line side sections housing a pair of inline fuses which connect respective load and line side terminals, and a breakaway receptacle that releasably joins the line side terminals to corresponding line conductors. The line side section of the fuseholder includes a boss on one side thereof and the load side section and breakaway receptacle each include mating grooves formed therein. The boss is received within both grooves when the fuseholder assembly is properly assembled to polarize the fuseholder sections with respect to one another and to polarize the attachment of the breakaway assembly to the line side fuseholder terminals.Type: GrantFiled: February 18, 1983Date of Patent: July 26, 1988Assignee: Cooper Industries, Inc.Inventors: Gayle L. Sappington, Angelo Urani
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Patent number: 4752243Abstract: A fuse connector which may be in the form of a one-piece plug connector molded onto a wire cord uses a standard cartridge fuse that is contained within the body of the connector. The body is provided with windows through which the fuse is visible and through which the fuse may be withdrawn or inserted without opening the body and without the use of special tools.Type: GrantFiled: June 2, 1987Date of Patent: June 21, 1988Assignee: Noma Inc.Inventor: Daniel Meidan
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Patent number: 4738639Abstract: An electrical plug includes a main plug body defining a cavity with a first fuse receptacle embedded in the cavity. A male electrical connector and second fuse receptable are connected to each other to form an insert, both the first and second fuse receptacles having a substantially hollow cylindrical shape, with the second fuse receptacle including an inward projection adapted to trap a fuse in the second receptacle, wherein the insert is removably received in the outer end section of the plug cavity so that the first and second fuse receptacles are aligned and the male electrical connector extends outside of the plug.Type: GrantFiled: May 28, 1987Date of Patent: April 19, 1988Assignee: Electri-Wire CorporationInventor: Robert E. Henderson
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Patent number: 4695815Abstract: An automobile fuse with damage indicator, in which two conductors of a small indicator bulb are connected in parallel with two conductors of a fusible link so that the bulb does not light as long as the fuse is in good condition; but will light immediately by current passing through the load after the fusible link is broken by an overload. The lighting of an indicator at the place where the fuse is installed directly indicates a burnt fuse, particularly at night or in a dark place and trouble shooting and replacement of fuse can be conducted quickly.Type: GrantFiled: May 7, 1985Date of Patent: September 22, 1987Inventor: Chern Hwang
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Patent number: 4690648Abstract: A cartridge fuse holder having a stationary electrical contact adapted to engage one of the end terminals of a cartridge fuse and a movable electrical contact adapted to engage the other end terminal of the fuse. The moveable contact includes a T-shaped electrical contact formed from an integral sheetmetal blank which is reciprocably mounted within the fuse holder in a fashion biasing it against its respective fuse terminal.Type: GrantFiled: April 5, 1985Date of Patent: September 1, 1987Assignee: Cooper Industries, Inc.Inventor: Angelo Urani
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Patent number: 4684914Abstract: A plug having an outer housing and an insert. The insert comprises fuse blocks and prongs. The outer housing has a sliding door for checking and/or changing the fuses. The outer housing also has a conduction wire inlet, through which the conduction wires fit, and prong holes through which the prongs of the insert can fit, so as to allow for easy assemblage of the plug. The insert slideably fits into the outer housing.Type: GrantFiled: October 16, 1986Date of Patent: August 4, 1987Inventor: Zei C. Wu
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Patent number: 4679884Abstract: A fused electrical plug for interconnecting appliances with a power supply (such as a conventional wall outlet). The plug includes at least neutral and positive terminal posts and may includes a ground terminal. The plug also includes a first body portion from which the neutral terminal post extends, the first body portion including a cavity for receiving a fuse. A second plug body portion carries the positive terminal post while a hinge secures the first and second plug portions for pivotal relative movement between an open position wherein the fuse receiving cavity is accessible in a closed position wherein the fuse receiving cavity is inaccessible. Electrical communication to the appliance is established via a fuse within the cavity and the positive terminal only when the first and second body portions are in the closed position. In a preferred embodiment, the first and second plug body portions are molded with the hinge being formed as a living hinge.Type: GrantFiled: May 7, 1986Date of Patent: July 14, 1987Assignee: Litton Systems, Inc.Inventor: Eldon J. Klemp
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Patent number: 4679877Abstract: An electric plug has registering housing shells which interlock when pressed together by way of flexible legs with locking feet on one of the shells which pass through passages in the other shell. These legs deflect while the feet pass through the passages whereupon the legs spring back causing the feet to snap into locking position. The housing shells present a wireway into which contact barbs and a cord piercing and spreading prong project to respectively make electrical contact with the wire leads in an insulated cord in the wireway and to pass through and clamp the cord against outwardly curved side wall portions of the wireway while the housing shells are being pressed together.Type: GrantFiled: July 17, 1985Date of Patent: July 14, 1987Inventor: Joseph M. Ahroni
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Patent number: 4604602Abstract: A plug-in fuse assembly comprising a housing made of insulating material and includes upwardly extending side walls bridged by upwardly extending end walls, and a conductive plug-in fuse element secured in the housing. The conductive plug-in fuse element has parallel confronting terminals projecting downwardly from the bottom of the housing. The housing end and side walls uniquely have outermost vertical coplanar wall surfaces, preferably at the sides and top margins thereof, which are parallel to the housing sides involved and to the corresponding outermost vertical coplanar wall surfaces on the opposite end or side of the housing. The outermost vertical coplanar wall surfaces are adapted to engage the complementary outermost vertical wall surfaces of an identical plug-in fuse assembly placed with the identical end-to-end or side-by-side orientation besides it.Type: GrantFiled: April 16, 1985Date of Patent: August 5, 1986Assignee: Littelfuse, Inc.Inventor: John Borzoni
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Patent number: 4599679Abstract: Fuse panel or bus bar assemblies for supporting a plurality of fuses within an automotive electrical system. The bus bar assembly is characterized by its rugged simplicity, enabling the simultaneous support of as many as 20 fuses. A non-conductive housing is provided for support of a pair of metallic bus bars, each bus bar having a plurality of downwardly bent tangs defined in its sides. The bus bars are mated 180.degree. out-of-phase and fitted together, such that in the individual pairs the downwardly bent tangs define a seat for the fuse blades. Adjacent electrical terminal receptacles are provided within the housing such that the fuse blades may contact the appliance terminal simultaneously with contact of the pairs of downwardly bent tangs.Type: GrantFiled: August 3, 1984Date of Patent: July 8, 1986Inventor: Edward J. Baader
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Patent number: 4580124Abstract: A plug-in fuse assembly comprises a housing made of insulating material and having relatively closely spaced vertical side walls bridged by vertical end walls and a metal plug-in fuse element having laterally spaced, generally parallel confronting terminals at the bottom thereof projecting downwardly from the bottom of said housing and upwardly extending current-carrying extensions of said terminals and a unique S-shaped fuse link extending between said current-carrying extensions. The current-carrying extensions have upper vertical outer margins which are inwardly offset from a given point to the tops thereof with respect to the corresponding vertical outer margins of the plug-in fuse element below the same, to provide clearance spaces for the downward passage of the vertical end walls of the housing, so that the overall width of the fuse is not significantly increased, if at all, by the housing end walls.Type: GrantFiled: August 17, 1984Date of Patent: April 1, 1986Assignee: Littelfuse, Inc.Inventor: John M. Borzoni
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Patent number: 4536046Abstract: Assembly systems for compact N-pole fusible pull out switches of different ratings use the same two part insulator bases and the same insulator pull out heads in all switches. In one system, for switches of a given current rating but two different voltage ratings, there are two types of fixed contacts in the base but the contacts are the same for both voltage ratings; the fuseholder/stab contact members in the head are all the same for both switch ratings, and all mounting hardware and incidental hardware is the same for all switches. The voltage ratings are differentiated from each other only by different base terminals and by different insulator barriers over the base contacts.Type: GrantFiled: March 29, 1984Date of Patent: August 20, 1985Assignee: Boltswitch, Inc.Inventor: John W. Erickson
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Patent number: 4480891Abstract: An electrical plug, of male or female construction, provided with a relatively enlarged opening between the main conductors of the plug such as outwardly projecting prongs or inwardly disposed blades, for removal from and insertion therein of an overcurrent-protection device and cooperating safety latch means. The direction in which said device and latch means are removed from the plug is the same as the direction in which the plug is engaged to its mating electrical device so that such removal and replacement may be effected only if the plug or socket is not in union with its mating electrical device.Type: GrantFiled: September 14, 1981Date of Patent: November 6, 1984Inventor: Jeng-Shyong Wu
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Patent number: 4444455Abstract: A fuseholder assembly for a fusible loadcenter is described. The assembly comprises a fuse unit and a base member. The fuse unit includes a pair of spaced apart U shaped fuse clips axially aligned about the longitudinal axis of a cartridge fuse. The fuse clips each have two mutually opposed wing contact portions that are substantially parallel to the longitudinal axis. The broad contacting surface area of the wing contact portions are capable of making contact with a load or line contact. The base member has an opening therein for receiving the fuse unit. The base member has a load and line contact each of which includes a base portion and two resilient side strips that are closely adjacent to each other. Each side strip is independently biased towards the opening in the base member and lies on a plane normal to the longitudinal axis.Type: GrantFiled: July 16, 1979Date of Patent: April 24, 1984Assignee: Federal Pioneer LimitedInventors: Paul R. T. Wiancko, Victor D. Koniuk
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Patent number: 4434548Abstract: A plug-in electrical fuse comprises a fusible wire (9) disposed within an insulating housing (1) and connected between the ends of two blade-like terminals (4) secured within and projecting from the housing. Fuses of this type are manufactured by forming a strip of terminal members from strip metal, each member comprising two spaced substantially-coplanar blade-like terminal portions interconnected at their leading ends (5) by an integral cross-bar portion, and each terminal member being integrally connected with each adjacent terminal member in the strip by an interconnecting bar of the metal strip. Fusible wire is secured to the terminal portions adjacent their rear ends to form a strip of terminal and wire assemblies, and this strip of assemblies is mounted in a strip of insulating housings with the fusible wires disposed within the housings and the leading ends of the terminal portions projecting therefrom.Type: GrantFiled: July 27, 1981Date of Patent: March 6, 1984Assignee: Kenneth E. Beswick LimitedInventor: David G. E. Beswick
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Patent number: 4420214Abstract: An electrical plug or socket having a replaceable overcurrent-protection device positioned within the plug or socket body. There is provided a safety latch means including a latch member adapted to be inserted into the plug or socket body to protect, to shield, to hold, to pass through, to engage or to affix the overcurrent-protection device or a base carrying the overcurrent-protection device, so as to prevent the overcurrent-protection device from being removed or slipping off, to improved the contact performance between the overcurrent-protection device and the contact terminals for connecting the overcurrent-protection device into a circuit, and thus to realize the maximum degree of safety of the electrical plug or socket. The safety latch means can be readily removed from the plug or socket for quick and inexpensive replacement of the overcurrent-protection device.Type: GrantFiled: February 14, 1980Date of Patent: December 13, 1983Inventor: Jeng-Shyong Wu
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Patent number: 4417225Abstract: A flat fuse including two plug blades arranged next to one another in the same plane, being spaced from one another. The plug blades are fabricated from stamped sheet metal parts, the plug zones of which extend, in each case, rearwardly in a one piece construction into current-conducting straps. Between the straps, there is arranged a fuse fusion wire which is fastened to the straps. The current-conducting straps and the fusion conductor are surrounded by and enclosed in a plastic casing. The fuse fusion wire includes a copper wire with a silver sheathing, and the current-conducting straps as well as the plug blades are fabricated from brass, in which arrangement at least the current-conducting straps, but preferably also the plug blades, are superficially tinned. The fusion conductor is welded, in each case, to a flat side of the current-conducting straps.Type: GrantFiled: April 8, 1982Date of Patent: November 22, 1983Assignee: Grote & Hartmann GmbH & Co. KGInventors: Wulf Muller, Manfred Kaiser
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Patent number: 4411486Abstract: A fuse holder for an electrical cartridge fuse (5), has an insulating housing (1") having a mounting recess (4) for the fuse (5) and a pair of contacts (2, 3) in the housing (1") for engaging respective end caps of the fuse (5). The housing (1") includes a pair of slots (6, 7) extending substantially parallel with the longitudinal axis of the mounting recess (4), the contacts (2, 3) being arranged one in each of the slots (6, 7). Each contact (2, 3) has a spring contact tongue (22', 27') which projects inwardly out of the respective slot (6, 7) to engage the associated contact cap on the fuse (5).Type: GrantFiled: February 19, 1981Date of Patent: October 25, 1983Assignee: Wickmann-Werke AGInventor: Martin Behrendt
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Patent number: 4391485Abstract: An in-line fuse holder capable of handling currents as high as 30 amps, adapted to accept miniature, relatively flat, plug-in fuses which have a pair of flat terminals and a fuse link visibly retained within a relatively flat plastic case. The in-line fuse holder has a relatively rigid casing in which a pair of generally U shaped contact clip assemblies are mounted for receiving the flat terminals of the plug-in fuse. The contact clips are of two piece construction with an inner clip of highly conductive material and an outer clip of highly resilient material. The outer clip fits over the inner clip to force the inner clip into low resistance contact with the fuse terminals.Type: GrantFiled: January 9, 1981Date of Patent: July 5, 1983Assignee: McGraw-Edison CompanyInventor: Angelo Urani
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Patent number: 4385282Abstract: A fused plug has a fuse cavity containing active and spare fuses which can be alternated between active and inactive positions. The fuses in turn preferably each have multiple fuse elements which can be alternatively placed in active position by changing the position of the fuse in the fuse cavity.Type: GrantFiled: August 14, 1980Date of Patent: May 24, 1983Inventor: Joseph M. Ahroni
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Patent number: 4365226Abstract: This two-piece fuse comprises a generally rectangular plastic, dielectric housing, and a one-piece wire conductor. The conductor is folded into generally W-shaped configuration, and its inverted, V-shaped center section is inserted into a central recess in the bottom of the housing in such manner that its two, spaced, V-shaped legs are bent around the grooved, rounded ends of a pair of rigid web sections which project from the underside of the housing. Opposite ends of the folded wire are secured in a pair of spaced openings in the housing so that the two V-shaped legs of the wire are supported in a common plane by two web sections of the housing. The diameter of the wire is greater than the depth of the groove in each web section so that portions of the wire legs project out of the grooves for engagement with contacts when the leg sections of the wire are inserted into a cooperating female receptacle.Type: GrantFiled: February 23, 1981Date of Patent: December 21, 1982Assignee: Fasco Industries, Inc.Inventors: Leon G. Barry, Willis E. Rieman
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Patent number: 4349805Abstract: A quick-acting micro-fuse comprising a fuse base and body, a fuse cover and a pair of electrically conductive lead wires. The lower ends of the conductive wires protrude from the fuse base and their upper ends are embedded into the fuse base and body. The fuse body comprises a pair of opposed, spaced apart and generally crescent-shaped members, each member having an outwardly curved surface, generally flat top and bottom surfaces and a generally perpendicular inner wall through which the lead wires extend, terminating at the same level as the crescent shaped numbers. A fusible element is stretched between the upper ends of the lead wires and is secured thereto, e.g., by soldering.Type: GrantFiled: May 12, 1980Date of Patent: September 14, 1982Assignee: San-O Industrial Co., Ltd.Inventor: Hiroo Arikawa
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Patent number: 4349804Abstract: A fuse assembly for a miniature plug-in fuse is provided with a pair of parallel spaced-apart conductive legs, each having plug-in members at one end. A fuse link of generally constant cross sectional area, integrally formed with the conductive legs, extends therebetween to form a fuse assembly of substantially planar construction. The fuse link is provided with one or more transverse offsets, each forming a weak spot.Type: GrantFiled: May 29, 1981Date of Patent: September 14, 1982Assignee: McGraw-EdisonInventor: Aldino J. Gaia
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Patent number: 4345223Abstract: A fuseless safety magnetic plug has a housing structure divided into a base and a cover, a pair of wire coupling devices, a magnetic device for preventing the plug from overloading, and two prongs for making electrical connections. The wire coupling devices require no instrument or disassembly of the plug for terminating a power cord because the connection can be made simply by inserting ends of the cord into the wire coupling devices from the outside of the plug. The magnetic device comprising a pair of electromagnetic members, a cam mechanism, a plurality of movable plates, a metal stud, a reverse spring, and a load discharging bolt, is mounted within the housing structure for controlling the current flowing through channels thereof and for breaking the circuit if any one of the channels is overloaded, while it resumes normal conduction by pressing down the load discharging bolt over the cover after the trouble is removed therefrom.Type: GrantFiled: October 28, 1980Date of Patent: August 17, 1982Inventor: Yu Chien-Chun
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Patent number: 4330167Abstract: A fused electric plug is consisted of a unique housing assembly, two unique fuse elements and an upper cover. Two unique copper plates having three leg elements are mounted respectively in the housing assembly, and the fuse elements are put on the housing directly. The upper cover is fixed to the housing assembly by a fastener or high-frequency welding or any other appropriate manner, the two fuse elements are thus connected tightly between power source and load respectively.Type: GrantFiled: December 18, 1979Date of Patent: May 18, 1982Inventor: Chen Chien-Tung
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Patent number: 4309069Abstract: A fused electrical plug assembly is provided having a plug body with a fuse socket between projecting prongs, and a push-in fuse unit is received in the fuse socket. The fuse unit has a pair of active fuse elements on one side and a spare pair on another side which can be used by removing the fuse unit, turning it to properly orient the spare pair, and pushing it back into the fuse socket.Type: GrantFiled: December 28, 1979Date of Patent: January 5, 1982Inventor: Joseph M. Ahroni
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Patent number: 4309068Abstract: A fused electrical plug assembly is provided having a plug body with a fuse socket between projecting prongs, and a push-in fuse unit is received in the fuse socket. The fuse unit has an exposed enlarged head for gripping to remove the unit and has one opposite pair of active fuse elements between which there is a spare pair which can be used by removing the fuse unit, turning it ninety degrees, and pushing it back into the fuse socket.Type: GrantFiled: December 5, 1979Date of Patent: January 5, 1982Inventor: Joseph M. Ahroni
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Patent number: 4300113Abstract: A fused electric plug having a removable cap between the electric prongs which may be unthreaded for the insertion of a fuse; the electric connector prongs extending from the plug housing are rigidly mounted on a prong holder which also holds a fuse socket in registration with an opposite tubular fuse socket.Type: GrantFiled: September 6, 1979Date of Patent: November 10, 1981Inventor: Rene Bronnenhuber
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Patent number: 4284319Abstract: A fused plug wherein at least one wire of a line cord is connected to a prong member by means of a fuse assembly in which one end of a length of fuse wire or other fuse material is electrically connected as by soldering or crimping to a portion of the line cord wire from which the insulation has been removed, the length of fuse wire lying along the line cord wire and being secured to the insulative sheath thereof by means of a sleeve, which preferably serves to electrically connect the fuse assembly to the prong member. The sleeve may further comprise a tang for connection to the prong member, for instance, by soldering, or the sleeve may be connected to the prong member by ring clip means, or by means of a pigtail to be provided in electrical contact with the sleeve for connection to the prong member. The fuse assembly further comprises an outer insulative sheath that covers the electrical connection between the fuse wire and the line cord wire, and covers a portion of the sleeve.Type: GrantFiled: February 11, 1980Date of Patent: August 18, 1981Assignee: Bel Fuse Inc.Inventor: Elliot Bernstein
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Patent number: 4274698Abstract: A fused electric plug has its housing made up by a pair of body shells and a slide door which can each be injection molded of a rigid thermoplastic material and yet will all snap-fit together and remain locked in position with a pair of conductor prongs held between the shells. Access to a pair of fuses in readily obtained after sliding the door to an open position whereat the door is held in operative position on the plug body.Type: GrantFiled: February 21, 1979Date of Patent: June 23, 1981Inventor: Joseph M. Ahroni
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Patent number: 4275374Abstract: In a preferred embodiment, a string of Christmas lights includes a plug adapted to receive an electrical fuse within a lower insertion opening in the plug-face from which the male prong elements extend from the plug such that when the plug is withdrawn from a socket a fuse may be inserted or withdrawn, the insertion opening for the electrical fuse being continuous with a fuse-holding channel having at a far-end thereof a small opening too small for insertion or withdrawal of the fuse, through which small opening an object may be inserted to press-against a fuse within the channel in order to push the fuse out-of the lower insertion opening while maintaining the plug in an assembled state.Type: GrantFiled: August 20, 1979Date of Patent: June 23, 1981Inventor: Daniel Chaucer
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Patent number: 4267543Abstract: A miniature electric fuse having variable thermal capacity and improved arcing characteristic comprising a fuse base and body, a fuse cover and a pair of electrically conductive terminals protruding from the fuse base and partially embedded into the fuse body. The fuse body comprises a pair of opposed, spaced apart generally crescent-shaped members, each member being defined by an outer curved surface, generally flat top and bottom surfaces and a generally perpendicular inner wall, wherein each of said inner walls is spaced apart and is in parallel facing relation to one another. The embedded ends of the electrically conductive terminals are disposed midway in each of the respective members of the fuse body. A groove is cut in each of said members from their top surfaces to midway in said members and thereafter angled horizontally relative to the inner walls of said members.Type: GrantFiled: November 13, 1979Date of Patent: May 12, 1981Assignee: San-O Industrial Co., Ltd.Inventor: Hiroo Arikawa
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Patent number: 4258350Abstract: The improved arrangement of plug-in fuses comprises multiple fuse assemblies each comprising a fuse body and a housing enclosing the fuse body, the fuse body having two parallel terminal blade portions with their both ends projecting from the housing which ends are fitted in small slit-shape socket openings formed in a fuse mounting board, and retaining pieces fixed on the mounting board for retaining the housing upright.Type: GrantFiled: March 29, 1979Date of Patent: March 24, 1981Assignee: Nissan Motor Company, LimitedInventors: Kiyoto Watanabe, Syuichi Otani
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Patent number: 4224592Abstract: A miniature plug-in fuse assembly is provided in which a pair of conductive legs and a fuse link interconnecting them are integrally formed from fusible metal. An insulating casing wholly encloses the fuse link and a portion of the conductive legs, the casing having a hollow body with a cover which does not extend beyond the body in its longer dimension. The cover is secured to the body by a retaining arrangement employing the ends of the conductive legs, which also provides for the insertion of a test current to test the fuse link. Other ends of the legs extend through the body to provide plug-in members. The legs are fastened to the body by protruding lugs on the plug-in members and projecting stops on the portion of the legs in the casing. A method for making the fuse assembly of this invention involves a series of die stamping steps to form the legs and fuse link from a continuous strip of fusible metal and mounting the legs and fuse link in the casing.Type: GrantFiled: April 3, 1978Date of Patent: September 23, 1980Assignee: McGraw-Edison CompanyInventors: Angelo Urani, Aldino J. Gaia
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Patent number: 4196409Abstract: A multiple fuse device having a multiple fuse assembly within the device rotatable about an axis in fixed directions through at least a certain predetermined angle and having at least two rotational positions in which at least one fresh fuse is connected between an electrical source and a load circuit, the improvement characterized by the assembly having a body with a conductor carrying portion having a plurality of radially extending angularly spaced apart separate conductors carried by said portion, at least three adjacent ones of said conductors being connected in a set in series each to its adjacent conductor by fuse means and at least one of the conductors in this set being connected with the source and an adjacent conductor simultaneously being connected with the load circuit to fusibly connect one line of the load circuit with the electrical source when the assembly is in a selected rotational position.Type: GrantFiled: June 22, 1978Date of Patent: April 1, 1980Assignee: Minami International CorporationInventor: Hisashi Juba
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Patent number: RE31017Abstract: A fused plug having the line cord wires terminating within the plug and a fuse link inside the plug between each wire and an associated plug prong.Type: GrantFiled: March 31, 1980Date of Patent: August 24, 1982Assignee: Bel Fuse Inc.Inventor: Elliot Bernstein