Abstract: A device and a method for its use to attenuate electromagnetic noise, such as that caused in power supply line current by back-emf from devices being powered, in order to provide cleaner, or more regular alternating current and voltage waveforms. A permanently magnetized magnet is held close to a conductor cable for an alternating current, in a case, which may also hold a permeable material extending from the magnet and at least partly surrounding the cable. Multiple magnets may be included, arranged parallel with each other and with like poles adjacent or facing each other, forming a tubular arrangement about the cable.

Abstract: A noise filter is provided with a cylindrical ferrite core having a wire insertion through-hole, the ferrite core being received within a case. A wire passing once through the wire insertion through-hole is looped to surround an exterior of the case and passes back through the wire insertion through-hole. A wire fixing portion is provided on the outer surface of the case so as to hold and fix a portion of the wire to the exterior of the case. The wire fixing portion includes a pressing surface and a pressing portion that faces the pressing surface, and the pressing portion is opened from and closed toward the pressing surface. Thus, the noise filter is prevented from displacement or sliding on the wire. Further, a method of mounting the noise filter on the wire is provided.

Abstract: A current transformer for a ground fault circuit breaker used on a circuit having at least one line conductor and a neutral conductor includes a toroidal core having a circular opening defining a center point and a multi-turn winding wound on the core. A first guide member is disposed on one side of the core, and a second guide member is disposed on another side of the core. The first and second guide members each have a hole for receiving the line conductor and a hole for receiving the neutral conductor formed therein. The guide members thus position the conductors with respect to the core. Also included is a method of correcting asymmetries in the current transformer. The method includes measuring the magnitude and orientation of any asymmetries, and then altering the current transformer based on the measured magnitude and orientation of the asymmetries so as to eliminate the asymmetries.

Abstract: A device for absorbing the electric noise on a cable contains a casing formed from two halves, in each of whose halves can be fixed a ferrite element. The two ferrite elements enclose the cable with the casing closed. A locking device keeps the two casing halves interconnected. The locking device is entirely housed within the casing walls, so that the casing cannot be unintentionally opened.

Abstract: A ferrite-core housing case 20 has a first split case half 21, and a second split case half 22 that is openable with respect to the first split case half 22, and houses a ferrite core 1 for a flat cable. A pair of spring portions 27 which press the ferrite core 1 are formed in at least one of the first and second split case halves 21 and 22, and a fulcrum of each of the spring portions 27 is located on a side face 22b of the split case half while an acting point is located on a center side.

Abstract: A device for absorbing electrical noise in a cable contains two ferrite cores, each of which is housed in a casing half-shell. The two casing half-shells are placed with the ferrite cores around a cable such that a cylindrical passage is formed. The casing half-shells include semicylindrical webs, which fit into grooves in the ferrite cores. The casing half-shells have a tongue on one of the half-shells and a ratchet member on another of the half-shells to provide an adjustable closure to accommodate variance in the dimensions of the ferrite cores.

Abstract: An electric noise absorber for clamping to a cord of an electronic device comprises a holding case composed of two box-shaped case members. Each case member contains a magnet having a hemi-cylindrical groove at the upper part of the magnet for receiving the cord. It is possible to easily and securely attach and detach the electric noise absorbing magnet to the cord by simply closing and opening the case members.

Abstract: An apparatus for use in arcing fault detection systems within circuit breakers and which is adapted for automated production by top-down assembly. In one embodiment, the apparatus includes a circuit board and a two-piece sensing coil within a two piece housing with its center oriented horizontally relative to the circuit board. In other embodiments the sensing coil is one-piece and is either preassembled with a sensing bus and oriented horizontally or oriented vertically relative to the circuit board. Also included are several methods for making electrical connections to the circuit breakers.

Abstract: A waterproof current transformer for supplying current to electrical cable monitoring devices includes a core assembly for attaching a remote circuit module to a monitored conductor and provides a concentrated magnetic flux indicative of the current level in the conductor. To facilitate installation and removal of the current transformer from the conductor, the core assembly is formed by a plurality of laminations served together and arranged in a generally rectangular configuration and joined with a magnetically conductive interlocking connecting means. A means for resisting moisture is disposed about the transformer to enable an indefinite submersion time span.

Abstract: An electric noise absorber provided with first, second and third magnetic body parts in first, second and third housing sections, respectively. Grooves are provided to form a first hollow in which an electric wire is placed between the first and second magnetic body parts when the magnetic body parts are connected by abutting faces. Moreover, grooves are provided to form a second hollow in which an electric wire is placed between the second and third magnetic body parts when the magnetic body parts are connected by abutting faces. The electric wire is wound desired times around the second housing section with the second magnetic body housed therein along the grooves in the opposite faces of the second magnetic body, and the first and third housing sections are closed, so that the electric noises flowing through the electric wire can effectively be absorbed.

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 noise absorber capable of preventing a cable from becoming damaged with a high degree of reliability while demonstrating outstanding noise absorbing characteristics is provided with a cover 1 and a pair of ferrites 21 and 22. The cover 1 is constituted through the combination of a first cover 11 and a second cover 12. The first cover 11 is provided with a ferrite storage portion 110 and a cable storage portion 111. The second cover 12 is provided with a ferrite storage portion 120 and a cable storage portion 121 . The ferrite storage portion 110 is formed at an internal surface of the first cover 11 and the ferrite storage portion 120 is formed at an internal surface of the second cover 12. The cable storage portion 111 is formed adjacent to the ferrite storage portion 110 at a side thereof, whereas the cable storage portion 121 is formed adjacent to the ferrite storage portion 120 at a side thereof.

Abstract: Method for replacing a first cable (1) by a second cable (2) between a first predetermined point (1a) and a second predetermined point (1b). The cable comprising,the provision of first series impedance means (S1) close to the first end (2a) and second series impedance means (S2) close to the second end (2b) of the second cable (2), which first (S1) and second (S2) series impedance means can be switched between a state of high impedance value and a state of low impedance value,electrically connecting the second cable to the first cable (1) at the first (1a) and second (1b) points, during which operation both the first (S1) and the second (S2) series impedance means are kept in their state of high impedance value,switching the first (S1) and (S2) series impedance means to their state of low impedance value before optionally removing the first cable between the first point and the second point.

Abstract: A noise filter has a magnetic core having a pair of magnetic core members each with a coupling surface. Each of the magnetic core members has a dented portion so arranged that, when the magnetic core members are closed together on the coupling surfaces, a closed magnetic path and an opening for inserting therethrough a cable are formed between the magnetic core members. An electrically insulating outer sheath member is disposed on an outer surface of each of the pair of magnetic core members. An electrically insulating coating member is disposed on an inner wall surface of each of the dented portions.

Abstract: A clamping mechanism for mounting a circuit condition monitoring device to electrical cables of various diameters includes a core member comprising a plurality of laminations arranged in a generally rectangular configuration. A spring spanning the core member is anchored at one end to the core at a point near the housing of the monitoring device and at the other end is attached to a bridging member affixed at the opposite end of the core near the housing. This allows the spring to expand less as it transverses the bridge in order to accommodate different power cable diameters.

Abstract: An electromagnetic noise absorber has a pair of ferrite cores arranged with open ends of the ferrite cores facing each other. Each of the ferrite cores includes an axial portion, an outer cylindrical portion and a bottom portion and is constructed by coupling an end of the axial portion and an end of the outer cylindrical portion to the bottom portion. A slot is formed in the outer cylindrical portion and the bottom portion of each ferrite core such that the slot extends from the open end of the outer cylindrical portion to the bottom portion. The electromagnetic noise absorber can be easily attached to a signal line by placing the signal line in the slots and turning one of the ferrite cores. Since the signal line are wound around the axial portion of the ferrite cores, the signal line has a high impedance.

Abstract: A noise absorbing apparatus includes a pair of ferrite members and a pair of covers. The ferrite members are located to oppose each other in tight contact with each other to clamp a cable therebetween. The covers cover the ferrite members. The covers form opening portions through which the cable is inserted. The covers are integrally formed with cable clamping pieces partly projecting in a radially inward direction of the opening portions. Each of the cable clamping pieces has a direction of thickness which is aligned with the radial direction of the cable. The cable is clamped with an elastic deformation force of the cable clamping pieces in the direction of thickness.

Abstract: A noise absorber capable of preventing a cable from becoming damaged with a high degree of reliability while demonstrating outstanding noise absorbing characteristics is provided with a cover 1 and a pair of ferrites 21 and 22. The cover 1 is constituted through the combination of a first cover 11 and a second cover 12. The first cover 11 is provided with a ferrite storage portion 110 and a cable storage portion 111. The second cover 12 is provided with a ferrite storage portion 120 and a cable storage portion 121. The ferrite storage portion 110 is formed at an internal surface of the first cover 11 and the ferrite storage portion 120 is formed at an internal surface of the second cover 12. The cable storage portion 111 is formed adjacent to the ferrite storage portion 110 at a side thereof, whereas the cable storage portion 121 is formed adjacent to the ferrite storage portion 120 at a side thereof.

Abstract: An electric noise suppressor is provided for suppressing high-frequency electric noise which comprises a thermoplastic housing and two ferrite members disposed therein. The thermoplastic housing is formed from two hingedly connected case halves, which are substantially identical. A ferrite member is secured to each case half by a laminated compressible adhesive-foam element, which is comprised of a resilient foam core layer and opposing adhesive layers disposed thereabout. Due to the resiliency of the foam core layer, the ferrite members are pressed into tight engagement within the thermoplastic housing. The end walls of the thermoplastic housing are formed with circular apertures, which are each formed with a diameter which is slightly smaller than the diameter of the cable which is engaged by the electric noise suppressor. The dimensional differences between the cable and the apertures allows the end walls to grippingly engage the cable at a predetermined location.

Abstract: A current ratio device for use in forming a hand-held openable-core clamp-on type of current transformer. The device employs electronically-aided three-stage circuitry for forming a current transformer capable of accurate low current measurements over a wide range of operation. Such a current transformer is specifically adapted for use with highly accurate active/reactive power and energy meters, and harmonic power analysers. For example a preferred form of clamp-on transformer can be used to measure currents in the range from 1 A to 200 A with ratio errors of less than 50.times.10.sup.-6 for both the in-phase and quadrature components.

Abstract: Proposed is a reduction of variance in electromagnetic noise eliminating effect with signal conductors arranged in a flat cable to which an electromagnetic noise absorber is attached. The electromagnetic noise absorber is provided with a plate magnetic body and a U-shaped magnetic body. Since the width of the plate magnetic body is smaller than the interval between the side walls of the U-shaped magnetic body, the plate magnetic body can be accommodated in the U-shaped magnetic body, with a clearance formed between the end portions of the plate magnetic body and the side walls of the U-shaped magnetic body. The impedance in the vicinity of the clearance is decreased, and the difference in impedance between the end portions and the middle portion of the electromagnetic noise absorber is decreased. Therefore, a variance in the electromagnetic noise eliminating effect with signal conductors of the flat cable is made small.

Abstract: A noise suppressor for engagement over a cable or ribbon, has a pair of ferrite core halves held in a pair of case halves which are closed around the cable or ribbon. The noise suppressor has a pair of case portions made of resilient material, each case portion having opposite side walls and a floor for defining a space with an open top for receiving a ferrite portion, and ends for passing the conductor. Hinges and latches or latches only hold the case portions together in a closed position around a conductor with the open tops of the case portions facing each other. Ferrite portions are in each case portion, each ferrite portion having a channel and at least one face. The faces engage each other and the channels merging when the case portions are in the closed position for passage of the conductor through the channel. A raised platform on the floor of each case portion is made as one piece with the case portion and extends into the space and into engagement of the ferrite portion.

Abstract: A clamping mechanism for mounting a monitoring device to an electrical cable includes a core assembly formed by a plurality of laminations secured together and arranged in a generally rectangular configuration. A spring spanning the core is anchored at one end to the core at a point near the housing of the monitoring device and at the other end is attached to a bridging member affixed at the opposite end of the core near the housing. This allows the spring to expand less as it transverses the bridge in order to accommodate different power cable diameters.

Abstract: A noise absorbing device is adapted to prevent radiation noise or induction noise from a cable connected to an electronic apparatus. A pair of holder segments (11 and 12) receive core pieces (20) in receiving recesses and are coupled by hinge portions (19) so as to be brought into butt contact with each other so that the pair of core pieces (20) form a cylindrical body with a cable extending therethrough. Elastic pieces (31) are interposed between the pair of core pieces (20) and the pair of holder segments (11 and 12) in order to provide an elastic force to the core pieces (20) so that the core pieces are slightly protruded from opening edges of the holder segments (11 and 12). When the pair of holder segments (11 and 12) are brought into butt contact with each other, the pair of core pieces (20) are put into press contact with each other by the elastic force of the elastic pieces (60).

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: An improved current mode coupler comprising a base (100), a housing (300) mountable to a panel. The coupler base (100) includes a pair of wire retainers (200) for securing the wires (230,231) of a twisted pair cable within wire receiving channels (204,205) of a wire nest (202) of the coupler base (100). Each wire retainer (200) has an arm (232), a strut (236) extending from one end thereof to a cylindrical hinge (234) disposed in a pivot region of the coupler base (100), a vertical section (240) proximate the other end including a latch (242), and a wedge (244) on the lower surface of the arm (232). Upon rotation of the wire retainer about hinge (234) to a closed position, wedge (244) is engageable with a lower one of the conductors (230) to urge it fully into a deeper one of the channels (204) adjacent a channel intersect ion proximate a conductor crossover.

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 signal discriminator which comprises a plurality of divided magnetic cores which surround a peripheral part of a cable when the plurality of divided magnetic cores are integrated. A resin case formed of a plurality of sections is capable of opening and closing and accommodates the plurality of divided magnetic cores. A press-contacting device press-contacts at least one of the plurality of divided magnetic cores and a corresponding one of the plurality of sections of the resin case. Engaging protrusions on the plurality of divided magnetic cores engage with corresponding recesses on the plurality of sections of the resin case.

Abstract: A current transformer, which is able to be mounted with a switching bar on a conductor having a high voltage, has a coil surrounding a U-shaped iron yoke. A U-shaped ground iron is swivel-mounted on one leg of the iron yoke and is supported at a break point. Springs are anchored on a housing for the transformer. When the current transformer is mounted, the conductor moves the ground iron in a closing position and is maintained in such position by the springs.

Abstract: Transformer, especially a measurement transformer, for detecting faults on electrical cables, for example.Transformer, comprising an elastically deformable split laminated cylindrical toroidal magnetic circuit (3), a screw-type assembly member (5), a coil (4) constituting its secondary and a casing (6) comprising a rigid casing part (19, 20) having side by side a housing (23) for the coil (4) and a housing (24) for the assembly member (5), the coil and the assembly member being fitted to a first end (8) of the toroidal magnetic circuit (3), and a deformable casing part (21) of annular ring segment shape one end of which is joined to the rigid casing part. The assembly member (15) includes an abutment (16) for defining the position of the first end (8) of the toroidal magnetic circuit and the deformable casing part has a length such that its second end cannot be locked to the rigid casing part unless the second end (9) of the toroidal magnetic circuit is fully engaged in the assembly member (5).

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 signal filter is disclosed herein for the filtering of electromagnetic interference carried by an electrical conductor having a housing enclosing a core of soft ferrite composition with a weak magnetic field impressed upon it adapted to be placed about the electrical conductor having a directional signal flow within the electromagnetic generation pattern of the conductor to absorb signal interference emission accompanying a transmitted signal. The housing has an indicator identifying magnetic flux directional polarity of the core. The housing may include a retaining strap or securement prongs that engage with the cable to maintain the filter in place.

Abstract: A current ratio device is used for forming a current transformer that can accurately scale down high currents to usable metering levels. The transformer has associated circuitry that renders it capable of functioning not only with ac and a mixture of ac and dc, but also when dc alone is present in the primary winding. The device employs a toroidal core and winding assembly that is cut along a plane containing the toroidal axis through a pair of diametrically opposite sections of the assembly that contain no windings, in order to separate the device into a pair of sub-assemblies that can be readily placed over a single turn primary, e.g. a busbar, without dismantling the same.

Abstract: A noise absorber provided with a fixture disposed at a flank of a body, thereby improving the positionability of the noise absorber and easy access thereto for handling. The body and the fixture are integrally connected by engaging a first engaging portion provided on the body with a second engaging portion on the fixture. When the body and the fixture are connected, the bottom of the body and the bottom surface of the fixture are at the same height, thereby coordinately supporting the noise absorber on a chassis or a printed board. Since the fixture is provided at the flank of the body on the same level, the height of the noise absorber as a whole is reduced. The noise absorber is thus advantageous for positioning in a location with limited space. Moreover, since the fixture to be handled is positioned at the flank of the body for easy access, the noise absorber of this invention can be easily fitted or disassembled.

Abstract: A housing and clamp assembly for mounting a circuit condition monitoring device on a monitored electrical cable includes a body member for housing device circuitry, a first relatively non-resilient clamp arm, and a second relatively resilient clamp arm. The clamp arms are biased closed around the conductor without pre-configuration of the clamp arms by parallel-spaced helical springs, which also serve to hold the cable against an indexing surface on the first clamp arm to minimize the effect of cable diameter on the spacing between the cable and the condition monitoring device and hence the calibration of the monitoring device.

Abstract: An electric current sensor assembly and method. A housing containing a Hall effect device is provided with at least one curved, concave surface for placement against a wire carrying a current. The housing is attached to the wire by a strap that fastens around the housing and the wire and fits in grooves in the housing. When the assembly is installed, the Hall effect device is positioned so that the magnetic field produced by current in the wire passes through the Hall effect device and produces an electric signal proportional to the amplitude of the current in the wire. A set screw is movably mounted in the housing adjacent the Hall effect device to adjust the sensitivity of the current sensor assembly.

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 device for injecting an electromagnetic signal into a conductive cable to be tested, the device being generally cylindrical and having a central bore through which the cable passes. A plurality of concentric cylinders is arranged around the central bore, including an inner conductive cylinder, an intermediate ferromagnetic cylinder and an outer conductive cylinder. The inner and outer cylinders are connected at one end to a signal generator by coaxial cable, and are interconnected at the opposite end.

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: An induction coil having two split-ring cores which are self-aligning. Each core is semi-circular, one core being fixed within a first jaw, and the other free to move within a second jaw. The jaws are pivotally attached and biased to form a closed loop in the relaxed state. A spring next to the free core urges the free core against the fixed core as the jaws are brought together. This action insures a proper contact between core ends which is necessary for optimum inductive coupling.

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: In the disclosed fault detector, a casing has a u-shaped portion for receiving a cable and a portion extending from the u-shaped portion. A screw is mounted on said portion. A pressure device is mounted on the end of the screw and directed toward the u-shaped portion for holding the cable in the u-shaped portion. A magnetic lamination passes through the u-shaped portion. The pressure device is made of a magnetic material and a coil surrounds said laminations.

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: An electric noise absorber for absorbing electric noise on an electronic device, comprising a piece or pieces of ferrite and an openable case composed of a pair of case members for containing the piece or pieces of ferrite, keeps the electric cable in position by means of two pairs of holding members, and also holds the cable loosely at openings formed in both ends of the case members. The electric cable is prevented from being damaged because the cable is not bent sharply in the vicinity of the openings. The piece or pieces of ferrite is or are attached to or detached from the case members easily owing to the elasticity of the holding members. Moreover, the electric noise absorber is installed on the electric cable simply by being placed at an appropriate position and being closed by means of a pair of protrusion and a pair of hooks provided on the two case members, respectively.

Abstract: An electric noise absorber, comprising hollow cases that are shaped so as to surround the periphery of electric cable of an electronic device and are filled with a magnetic substance, such as grain ferrite, which absorbs electric noise on the electric cable. The hollow cases are molded to fit the electric cable and the quantity of magnetic substance is adjusted to reduce as much electric noise as desired. Consequently, the electric noise absorber is made easily and has no extra units.

Abstract: An electric noise absorber for clamping to a cord of an electronic device comprises a holding case composed of two box-shaped case members. Each case member contains a magnet having a hemi-cylindrical groove at the upper part of the magnet for receiving the cord. It is possible to easily and securely attach and detach the electric noise absorbing magnet to the cord by simply closing and opening the case members.

Abstract: An electric noise absorber for holding a conduit of an electronic device comprises a retaining case composed of two box-shaped cases and auxiliary cases. A sponge-like member is fitted into the auxiliary case to prevent longitudinal movement of the cord or cable. A box-shaped case contains a magnet having a recess for receiving the cord or cable. It is possible to easily and securely attach and detach the electric noise absorber to the cord or cable by simply opening and closing the cases.

Abstract: A pair of identical covers house and insulate two split cores of the type used to submonitor current flow into a breaker box. The covers keep the cores in correct alignment and identify the proper orientation of a pick-up transformer that is coupled to the cores. The covers are molded from a non-conducting plastic and have an integral locking mechanism utilizing a living hinge. Integral spring tabs and integral alignment tabs hold the split cores securely next to one another. Arrow markings on the split covers are matched with an arrow marking on the pick-up transformer which is placed around the assembled covers to form a current sensing unit. The face of the current sensing unit with the arrows is directed towards the current source. Electric current can then be monitored using a digital watt/hour meter connected to the current sensing unit. The locking mechanism of the covers enables the current sensing unit to be easily removable for use at other locations.

Abstract: To enable a user to conveniently determine the amount of AC electrical power supplied by a cable assembly being consumed by appliances at any time, and to thereby enable control of power consumption, a meter indicating power consumption is installed at a convenient remote location and is wired to a sensing unit which is applied externally to the supply cable assembly. No penetration of or other physical connection with cable conductors is necessitated. An induction type sensor or Hall effect sensor may be utilized. The device is applicable to residential, commercial and industrial user/applications and may be built in or portable.