Abstract: A current transformer for a load switch which has an interior construction tightly engaged with a main bushing therein, allows a voltage in a cable to be detected by forming an engaging hole, communicated with a conductive socket of the main bushing, on a portion of an outer circumferential surface thereof, and which has a current transformer coating casing, made of a rubber material, for thereby diminishing a thickness of the current transformer, includes a core in a ring shape, a coil winding the core, a rubber coating member for tightly covering the core and the coil therein, and coil terminals connected to both ends of the coil. The rubber coating member includes a lower coating part for tightly covering a base unit of the main bushing, and an upper coating part for tightly covering a jaw unit of the main bushing, as well as the coil and the core.

Abstract: Planar transductor consisting of one or more rectangular ferrite cores having a rectangular passage through which a metallic section of rectangular cross section is guided, in particular for the secondary control of a power supply unit.

Abstract: An improved laminated ferromagnetic FIG. 8 power meter core is provided. The core is fabricated from a plurality of ferromagnetic plates and is formed in the general shape of a FIG. 8. The central leg of the core has a cross-sectional area that is larger than the cross-sectional area of other parts of the core. The core gap, in which a Hall-effect sensor is located, has gap faces with chamfered or rounded over edges to reduce fringing and bypassing effects. The core is formed without discontinuous corners that can result in local saturation and, in use, accommodates electrical power conductors in an over-under looping relationship through the openings of the core to provide a more homogeneous magnetic flux within the core and thus more reliable metering. The overall result is a core with a higher saturation point and thus a wider dynamic range than prior art cores.

Abstract: A control unit accommodates various equipment, such as a circuit breaker, an electromagnetic switch, a zero-phase current transformer, and an operating transformer. The zero-phase current transformer is generally triangular-shaped to fit more compactly within the control unit. More specifically, the zero-phase current transformer comprises an annular core having a shape which is substantially triangular, wherein the annular core encloses an aperture region having a shape which is also substantially triangular. A primary conductor is disposed within the aperture region, and a secondary conductor is wound on the annular core.

Abstract: The present invention discloses an electromagnetic device which includes a magnetic flux producing apparatus for producing a magnetic flux path loop. The magnetic flux producing apparatus preferably comprises a magnetic core 20 surrounded by electrical windings 22. A strip of electrically conductive material 24 is disposed such that it passes through the magnetic flux path loop and overlies the windings 22. The strip 24 has a width which is substantially greater than its thickness. The device may further include an antenna 16 which is electrically coupled to the strip 24.

Abstract: A coupling device of synchronous cable for connecting a frequency of an induced voltage generated from a fly back transformer (FBT) is provided. The coupling device includes a metal support 53 formed with an accommodating groove 52 so as to be interposed with a shield metal 51 to a front wall surface of a case 50 of the FBT. Case 50 is provided with a ferrite core 60, and the ferrite core 60 is inserted and supported between the metal support 53. Shield metal 51 of the metal support 53 is connected with a synchronous cable 70 and grounded so as to draw out an induced voltage of the FBT. According to this design, not only a frequency of the induced voltage generated from the FBT is made to be stably drawn out, but also the coupling of the synchronous cable is automated whereby its workability and a productivity are improved.

Abstract: Electric current, flowing through a penetration conductor extending through a main housing, is detected by a non-contact current detection unit incorporated in the main housing. Connector housings are provided respectively at those portions of opposite sides of the main housing through which the penetration conductor extends, and opposite end portions of the penetration conductor as connector terminals are disposed within the connector housings, respectively. Each of the connector housings and the associated connector terminal received therein jointly constitute a connector.

Abstract: A common mode choke has a generally rectangular ferrite body for surface mounting on a printed circuit board. First and second spaced apart slotted openings extend vertically between the top face and the bottom face of the ferrite body. At least one pair of electrical conductors extend along parallel paths from the bottom face through the first slotted opening to the top face, along a portion of the top face, and back down through the second slotted opening to the bottom face. One pair of opposing side faces preferably has lower portions extending outwardly past a plane of the bottom face to thereby serve as a support to mount the bottom face of the ferrite body in spaced relation from the circuit board. The electrical conductors may then extend outwardly from the bottom face of the ferrite body for electrical connection through corresponding openings of a circuit board or extend laterally outwardly for electrical connection to corresponding portions of the circuit board in a gull wing configuration.

Abstract: An integrated and drop-in EMI filter that features common-mode and differential-mode noise filtering capabilities is disclosed. The common-mode portion and the differential-mode portion of the filter are independent of each other in that the two filter portions may be made out of different ferrites, also in that, the an increase in the filtering capability in one mode, such as having an increased number of turns in the winding, would not affect or reduce the filtering capability of the other mode, such as reducing the overall throughhole depths a conductor travels.

Abstract: A rectifying saturable reactor generates a magnetic force in a magnetic iron core in response to a current that flows through an electronic circuit. The saturable reactor makes use of saturable magnetic flux in view of a hysteresis loop of a magnetic material for rectification and selects the saturated magnetic flux to be greater than an integrated value of a voltage applied to the rectifier in the rectifying circuit. In order to improve a rectifying performance, a no cut and one turn structure or an equivalent is introduced into a magnetic core for providing a hysteresis loop that varies as much as possible in magnetic induction.

Abstract: An air-coupled current transformer is provided with a primary current conductor and two secondary coils connected such that the emf induced in each coil by an external disturbing magnetic flux is subtractive, whereas the emf induced by the current in the primary is additive. Two ferromagnetic core pieces enhance the rejection of the emf induced by the disturbing flux. Ceramic spacers are inserted into air gaps between the core pieces for maintaining the gaps fixed to keep the scale factor of the transformer independent of temperature.

Abstract: A small toroidal inductor is mounted by inserting a high valued resistor or a ceramic coil form into the central hole of the toroid. The fine leads of the inductor are then soldered to the much stiffer leads of the part that has been inserted. These stiffer leads may be bent in any desired way, and will hold their shape. This makes insertion easier and is strong enough to withstand the necessary amounts of shock and vibration. The toroid may be glued or otherwise affixed with an adhesive to the resistor or coil form.

Abstract: A noise filtering device includes an upper casing member and a mating lower casing member, each defining a recess with a flexible flange disposed along the periphery thereof for receiving therein a magnet having inclined side surfaces. The flexible flange is bent inward to abut against the inclined side surfaces of the magnet so as to securely hold the magnet within the recess of each of the casing members. A connection member which is constituted by a portion of each of the casing members and has ends respectively secured to the casing members is provided to hold the casing members together along one side thereof so as to allow the casing members to be rotatable relative to each other about the connection member. A groove is formed on each of the magnets and extending from one side of the casing members to the opposite side to allow a signal wire to be received therebetween to extend through the noise filtering device.

Abstract: A distributed low-pass filter typically attenuating a signal, 7 db. at 10 MHz., 18 db. at 30 MHz., and continuing at 50 db/decade, without resonant inflections, uses a small, low cost, rectangular tubular bead of outside dimension 3 mm..times.6 mm..times.2 mm., made from a body material having evenly distributed magnetic, dielectric, and resistive properties. A through-conductor completes the distributed filter which acts like a high loss cable transmission line. The tube's inner and outer surfaces are separately coated with an electrode material. The through-conductor electrically connects to the inner electrode, with its ends providing first and second filter terminals, and the outer electrode providing a common, terminal. An a.c. signal impressed between the first and common terminals produces an attenuated signal between the second and common terminals in accordance with the above characteristics. Also, a 6 mm..times.6 mm..times.1 mm block of the body material may typically form a 500 .mu.

Abstract: A clamp-on magnetic sensor includes a U-bar first magnetic core section and a straight magnetic core section that integrally fit together so that the straight magnetic core section is held in place by the U-bar. The compression and the mating of the surfaces to the U-bar and the straight magnetic core section provide superior response to sensed AC current.

Abstract: A cable coupling trandformer having a metal or ferrite member defining separate high permeability portions of a pair of flux paths, a winding electromagnetically associated with each high permeability portion, and a common low permeability portion of each flux path which passes between a pair of conductors carrying equal currents in antiphase. A portion of the current induced in either the conductors or the windings are impressed on the other to create a simple communications device.

Abstract: A common mode choke has a generally rectangular ferrite body for surface mounting on a printed circuit board. First and second spaced apart slotted openings extend vertically between the top face and the bottom face of the ferrite body. At least one pair of electrical conductors extend along parallel paths from the bottom face through the first slotted opening to the top face, along a portion of the top face, and back down through the second slotted opening to the bottom face. One pair of opposing side faces preferably has lower portions extending outwardly past a plane of the bottom face to thereby serve as a support to mount the bottom face of the ferrite body in spaced relation from the circuit board. The electrical conductors may then extend outwardly from the bottom face of the ferrite body for electrical connection through corresponding openings of a circuit board or extend laterally outwardly for electrical connection to corresponding portions of the circuit board in a gull wing configuration.

Abstract: A current transformer comprising a primary conductor means 20, secondary conductor means in the form of a first and second coil 21, 22 connected to ensure common-mode rejection of emf induced by external disturbing magnetic fields, and magnetic coupling means defined by first and second magnetic plates 23, 24 and first and second ferrite elements 25, 26 arranged within the first and second coils 21, 22, the elements 25, 26 contacting and physically separating the first and second plates 23, 24, thereby defining a closed magnetic circuit with the plates.

Abstract: A chip type of noise suppressing filter consists of an almost rectangular solid shaped ferrite core in which a magnetic field is induced, two penetration holes penetrating into a central portion of the ferrite core from a front side thereof to a back side thereof, and a metallic terminal formed of a metallic plate in which an electric current flows across the magnetic field induced in the ferrite core. The metallic terminal consists of two internal terminals inserted into the penetration holes, and two external terminals forcibly fitted on end surfaces of the ferrite core. The internal terminals is connected with each other at the back side of the ferrite core, and the external terminals being connected with the internal terminals at the front side of the ferrite core. Therefore, the electric current flows through one of the external terminals, one of the internal terminals, the other internal terminal, and the other external terminal, in that order.

Abstract: A signal discriminator comprising:a plurality of sets of dual divided magnetic cores having different characteristics;a case made of a synthetic resin having a hinge capable of opening and closing the case and a latch means, of which inner portion is divided into sections by a plurality of partition plates, said sections respectively accommodating the plurality of sets of dual divided magnetic cores; andpress-contacting means interposed and retained between the case and the plurality of sets of dual divided magnetic cores, which press the plurality of sets of dual divided magnetic cores when the case is closed and latched by the latch means, thereby uniformly press-contacting respective divided faces of the plurality of sets of dual divided magnetic cores.

Abstract: There is provided an enclosure that encapsulates a current transformer by utilizing a snap together design while allowing for electrical coupling between the transformer and external wiring. Two housing members will snap together while capturing the transformer in a rigid fashion to avoid excess vibration or friction, which could fatigue the transformer's wiring.

Abstract: In a solid inductor having an inner conductor formed by passing through a magnetic material, a vitreous diffused material is applied to the surface of the magnetic material, and the diffused material is diffused into the magnetic material by heat treatment, to form a diffusion layer exhibiting low permeability. The thickness of this diffusion layer is adjusted, thereby to make it possible to adjust the inductance value of the solid inductor as well as to improve resistance to humidity of the solid inductor.

Abstract: A noise absorber that can be securely attached around electric wires of various diameters and types, and can be firmly closed without any electric wire caught between the ferrite parts. Wire supports are erected at both sides of a wire-receiving through hole on the inner surfaces of opposed walls of a first case member of the noise absorber. The tips of the wire supports are tilted toward the central axis of the through hole. Almost Y-shaped receptors are formed on the inner surfaces of opposed walls of the second case member for engaging with the tips of the wire supports when the case members are closed. The upper portions of the receptors serve as guide slopes for pressing inwardly the tips of the wire supports, so that the wires are securely pinched between the wire supports.

Abstract: An electric noise absorber comprising at least two ferrite pieces having abutting planes, at least two case members containing the ferrite pieces respectively and being closed by means of engagement members, and a spring member provided in at least one of the case members for pressing the ferrite pieces against each other when the case members are closed. Since the case members for keeping the ferrite pieces in appropriate positions and the spring member for pushing up the ferrite pieces for close contact are separately molded, the case members are bestowed with strength and the spring member with elasticity, both suitable for their own purposes. The case members requires no apertures for biasing members and therefore outside magnetic substance is prevented from contacting with the ferrite pieces contained in the case members.

Abstract: A contactless power transfer system, especially for powering electric loads, hazardous loads or underwater loads and the like. A converter supplies high frequency power to a conductor loop. A coupling sheath or link has a core-mounted conductor at least partially surrounded by a magnetic core which slidably receives a portion of the conductor loop within the link. An optional secondary converter converts power from the core-mounted conductor to meet the load requirements. A contactless power distribution system delivers power to a variety of loads through clamped-on or captive links attached at any location along the conductor loop. Methods are also provided of powering a movable electric load, or a stationary load from a movable source, and of distributing power to a plurality of portable electric loads.

Abstract: An electromagnetic noise filter has a plurality of U-shaped wires passing through a ferrite core. Some of the wires are singly fitted in throughholes, whereas other wires are commonly fitted in throughholes. The wires can be interconnected to provide for impedance to both differential-mode and common-mode noise.

Abstract: A monolithic magnetic device having a plurality of transformer elements having single turn primaries and single turn secondaries fabricated on a plate of ferrite which has the outline of a ceramic leadless chip carrier. Each of the magnetic elements has a primary winding formed from a copper via plated on the ferrite. Each element's secondary is another copper via plated over an insulating layer formed over the first layer of copper. The elements' primaries are interconnected on the first copper layer and the elements' secondaries are interconnected on the second copper layer. The configuration and turns ratio of the transformer are determined by the series and or parallel interconnections of the primary and secondaries. Some of the interconnections can be provided by the next higher assembly level through the circuit card, with the same magnetic device providing many turns ratio combinations or values of inductors.

Abstract: A submersible contactless power transfer system, especially for powering underwater electric loads, including movable loads, such as underwater vehicles, elevators, or worksite equipment. A converter supplies high frequency power to a conductor loop. A coupling sheath or link has a core-mounted conductor at least partially surrounded by a magnetic core which slidably receives a portion of the conductor loop within the link. An optional secondary converter converts power from the core-mounted conductor to meet the load requirements. A contactless power distribution system is submersible to deliver power to underwater loads through clamped-on or captive links attached at any location along the conductor loop. Methods are also provided of powering loads submersed in water, including seawater, or other non-magnetic liquid mediums.

Abstract: An apparatus for providing electromagnetic shielding. A wire for carrying an electrical signal is shielded with a first cylindrical ferrite shield by passing the wire through its central passage. The first ferrite shield has magnetic characteristics which provide attenuation of electrical noise over a first particular frequency band. A second cylindrical ferrite shield is situated adjacent the first shield with the wire passing through its central passage. The second ferrite shield has magnetic characteristics which provide attenuation of electrical noise over a second particular frequency band. A plastic package surrounds the first and second ferrite shields, and holds the first and second shields end to end in fixed proximity to one another. The plastic package includes a pair of half-cylindrical package sections having a joined edge and two open edges with a hinge portion joining the pair of package sections at the joined edge.

Abstract: An electrical noise absorber comprising a magnetic body like ferrite attached around a flat cable and a fixing member. The fixing member comprises an inserting portion having a through hole for passing the magnetic body therethrough. Opposite walls defining the through hole extend in the direction, in which the magnetic body is inserted, to form a pair of cable fixing arms. Each of the cable fixing arms has a slot and projections for engaging the side edges of the flat cable. Engaging portions for engaging the periphery of the magnetic body inserted into the fixing members are provided on the top and bottom of the inserting portion. The flat cable and the magnetic body can thus be held immobile by the fixing members of the electrical noise absorber.

Abstract: A method and apparatus for suppressing capacitive current in transformers is described. The winding of a transformer is constructed or modified into two substantially identical winding halves wired in a series aiding configuration. Two leads emanate from the center point of the winding, where the two halves are connected in series. This center point is at a constant potential throughout the switching cycle of the transformer. Suppression of the capacitive current in the input/output leads of the transformer is achieved by introducing common mode impedance into each lead and a corresponding center tap lead. The common mode impedance can be introduced in a variety of ways such as: running the pair of leads through a toroid, bead or sleeve of magnetic material; winding the leads on a magnetic toroid or rod; or using the magnetic core structure to introduce the impedance.

Abstract: A CM type directional coupler comprises a body having a dielectric layer, an annular magnet buried in the dielectric layer, a pair of transmission lines juxtaposed with a predetermined spacing between them in a magnetic area enclosed by the magnetic ring in the dielectric layer, and lead terminals extending from opposite ends of each of the transmission lines to outside of the dielectric layer, and all these elements are formed integrally with each other to provide a single device. Therefore, a large coupling factor and directivity are ensured, and the coupler can be designed very compact. This directional coupler can be manufactured with a highly improved yield and mass-producibility, so it is very suitably usable as a power detector in a portable telephone.

Abstract: A transmission line transformer device has a body of magnetically permeable material defining two passages each of which is adapted to receive a pair of conductors which extend up one passage, between the passages and down the other passage. The conductor insulation and spacing are adapted to provide a predetermined characteristic impedance across the bandwidth and the body dimensions and passage spacing are adapted to provide isolation between the conductors and selected impedance across the bandwidth.

Abstract: In a current transformer arrangement for three-wire three-phase systems, use is made of a single busing transformer (4) arranged on the three-phase side. Two of the total of three phase conductors are pushed through the bushing transformer, specifically either with the same number of turns per unit length and in mutually opposite defined directions or with the same direction and with the ratio of different numbers of turns per unit length of 2:1 or with the same direction and a current flow halved in a phase conductor by a shunt (15). These arrangements prevent the occurrence of a zero resultant magnetic flux. The double secondary voltage produced by a double AW value occurring twice during each period is halved by an electronic correcting circuit. The control commands are derived from suitable control pulses for the thyristors (21-26) of the three-phase bridge circuit (16). Two correcting circuits are specified.

Abstract: An EMI bead core filter is used to suppress or reduce a noise by utilitizing the characteristics of increasing the impedance in high frequency, which comprises of a ferrite core, a lead wire and a coating layer. The coating layer deposited on the upper portion of the core and the bending of the wire to adhere between the core and the wire by coating with an epoxy powder. A process of this invention comprises of the steps of bending, inserting, tapping, heating, coating, packaging and hardening, and especially the coating is accomplished by carrying repeatedly out four times, that is, upon preheating at 380.degree. C. and heating at 335.degree. to 340.degree. C. A coating apparatus has a vacuum device, a powder chamber and two heaters. The filter has a high impedance and a small size.

Abstract: A noise suppressor for engagement over a cable, comprises a ferrite core having a core passage extending therethrough from one end to the other. A sleeve of resilient insulating material is cast, injected, dipped or molded over the ferrite core to cover the core. The sleeve includes on opposite sides thereof, a sleeve passage communicating with the core passage. One of the projections may be resilient or may be replaced by a closed end of the sleeve with a slit, for closely engaging a cable to fix the sleeve at a selected location along the cable. A pad may be included in one or both of the sleeves to further hold the sleeves securely on the cable. The sleeve may have a cylindrical or rectangular cross section to accommodate cylindrical or ribbon shaped cables.

Abstract: A technique and apparatus for measurement of resistances of 0.01 ohm and s without disconnection from the circuit. The invention is used for measurement of degradation in cable shields by measuring the droop caused by circuit resistance in an induced current pulse in the undisconnected circuit. The method can also be used for measurement of junction resistances in high current circuits such as auto starters. The invention allows measurements to be made with the circuits connected so that the faults are present in the measurement setup. The method includes inductive coupling of long duration repetitive current pulses onto the circuit under test, measurement and display of induced current pulses, and display of induced current pulses on an oscilloscope.

Abstract: A noise suppressor for permanent engagement over a cable comprises first and second case halves which are connected to each other by a hinge. At least one female latch tab is mounted to the first case half near an interior surface of the first case half and a male latch tab is mounted on an interior surface of the second case half. With the first and second case halves closed over a cable, the male and female latch tabs are locked to each other and are inaccessible from outside the case. The case may not be opened except by destroying the case. End walls of the case portions have recesses for passage of the cable therethrough and each case portion contains a suppressor core having a passage for receiving the cable.

Abstract: A magnetic core for a signal line filter adapted to be assembled in a terminal connector for a signal line cable for connecting electronic devices to form a signal line filter, wherein the magnetic core is provided with pin insertion holes each having a tapered portion in the direction of thickness of the magnetic core, or tapered portions at both sides in the direction of thickness of the magnetic core.

Abstract: A dual mold choke is provided to reduce both differential and common mode electromagnetic interference. Ferrite cores are placed around DC power bus bars providing an inductor limiting differential mode noise and creating a choke reducing common mode noise. The use of E-cores provides a simplified mechanical assembly while providing high levels of noise reduction. An air gap between the center legs of the cores prevents saturation of the choke.

Abstract: In a sensor for sensing current in a conductor, a magnetic laminar arrangement adapted to surround the conductor passes through a coil. Inside the coil the laminar arrangement forms a gap with two projections extending transverse to lamina within the arrangement and facing each other. In one embodiment the coil drives a display to form part of a fault indicator.

Abstract: A split ferrite bead case is provided for a flat conductor cable. The case includes opposed elongated slots for a flat conductor cable to extend through so that the split ferrite bead can suppress electromagnetic interference carried by the flat conductor cable. The opposed elongated slots include cable holding means which are operative to prohibit lateral and angular shifting of the flat conductor cable in the split ferrite bead and prevent the case from sliding along the length of the flat conductor cable.

Abstract: A cable assembly 100 capable of electromagnetic interference suppression a cable strain includes relief 106, a tubular electromagnetic interference suppressor 110 located within the strain relief 106, both of which are disposed around electrical cable 102. The electromagnetic interference suppressor 110 attenuates any electromagnetic interference ("EMI") which might get coupled to electrical cable 102. By attenuating the EMI coupled to electrical cable 102 the problems associated with the electromagnetic interference can be minimized.

Abstract: A welding apparatus is disclosed to include an electrically insulating casing, first and second welding electrodes, and a welding transformer having a toroidal core, a multi-turn primary winding and a single-turn secondary winding. The core includes a grain-oriented silicon steel material coiled with an insulator. The primary winding has turns axially wound about the core. The secondary winding includes two conductive arm sections which are connected to the electrodes and a wound section including conductive wire cable which electrically connects the two arm sections. One of the arm sections can provide the frame member to support the transformer. The apparatus is suitable for spot or linear welding.

Abstract: A differential electrical current shunt which is particularly adapted for the measurement of large currents with high accuracy and substantially free of errors due to ageing, connection resistance and differentials therein and thermally induced resistance changes. The shunt, according to the invention divides the large current into two substantially equal portions by forming a preferably elongated aperture in a conductor carrying the large current; the two portions of the conductor formed by the aperture having substantially equal but slightly differing resistances. The two conductor portions are formed with respect to a core such that the conductor portions each form a single turn coil on the core with the induced flux from each conductor portion opposing that included in the coil by the other of the two conductor portions.

Abstract: A high voltage, high power DC power supply includes a single turn primary winding driven through a resonating capacitor by an AC source having a frequency in excess of about 100 kHz. The primary winding includes a pair of concentric cylindrical metal walls having opposite ends electrically connected to each other. A volume between the walls includes plural secondary winding assemblies, having different axial positions along the walls. Each of the assemblies includes an annular magnetic core surrounding the interior wall, a winding on the core and a voltage doubler rectifier. DC voltages developed across each secondary winding assembly by the rectifier are added together to provide the high voltage, high power output. The power supply energizes an X-ray tube having a grounded anode and a cathode at a DC voltage of approximately -150 kV, with a power requirement of between 15 and 60 kW.

Abstract: A displacement measuring apparatus including a variable inductance coil formed of a pair of coils, on a core of predetermined length made of a material having high magnetic permeability. The pair of coils are disposed on a core adjacent to each other in their axial directions and are covered by a metal sleeve of substantially the same length of one of the coils. A detecting circuit is provided including a high frequency oscillator and a rectifier and is connected to the variable inductance coil, wherein when the metal sleeve is slidably moved, the detecting circuit generates a direct current voltage in correspondence with the displacement of the metal sleeve.

Abstract: A high frequency noise suppressor for engagement around a cable comprises a pair of case halves made of nylon or other rugged synthetic material which can be snapped around a cable in clam shell like fashion. A ferrite core half is positioned in each case half for defining a ferrite core member around the cable. Each case half has opposite end walls with semicircular recesses. A plurality of triangular fingers extend into each recess and are positioned at a slight angle outwardly with respect to an interior of each case half. The fingers have truncated apexes for defining a small opening in each recess. If a cable which is larger than the small opening is to be engaged by the suppressor, the fingers bend outwardly on opposite sides of the case for firmly engaging the cable. This resists relative movement between the closed case and the cable in either direction along the cable.

Abstract: An electric noise absorber comprises an axially divided magnetic body having abutment surfaces, a first joint on which the divided magnetic body can swing, and a second joint having a resilient member. The end of a second joint is attached to one part of the divided magnetic body, and the other end of the second joint can be attached to or detached from the other part of the divided magnetic body. Since the second joint can be unlocked, the electric noise absorber can be easily attached around a desired position on the electric wire without disconnecting the electric wire. When the other end of the second joint is pulled and attached to the magnetic body using the contraction force of the resilient member, the abutment surfaces of the divided magnetic body are held closely adjacent to the electric wire, making a magnetic circuit about the electric wire. The electric noise absorber can thus absorb electric noise with a minimum required structure.

Abstract: A transmission line transformer that can balance imperfectly balanced signals, and can convert a balanced input to an unbalanced output. The transformer includes two unbalanced transmission lines each having a characteristic impedance Z.sub.o. The outer conductor of each is interrupted at its midpoint and is connected to the corresponding interrupted outer conductor of the other. An input signal applied across the ends of the first line's center conductor yields a balanced outer signal across the ends of the second line's center conductor. An unbalanced output can be obtained by terminating one end of the second line with an impedance Z.sub.o.