Abstract: Techniques of forming a transmitter coil are described herein. The techniques may include forming turns of the transmitter coil, wherein a non-uniform spacing between the turns of the transmitter coil is to reduce a magnetic field variation associated with the transmitter coil.

Abstract: Disclosed herein are embodiments of devices for measuring electrical current and related systems and methods for forming and using such devices. According to certain embodiments, devices according to the present disclosure may comprise Rogowski coils. Also disclosed are systems and methods for forming a current measuring device using a bobbin that may allow for the use of a continuous length of wire for all windings associated with the current measuring device. Automated manufacturing techniques may be utilized to facilitate the manufacture of devices for measuring electrical current and/or may reduce the cost of such devices. Various embodiments disclosed herein include the use of a bobbin that may be selectively configured between a linear configuration and a closed configuration. One or more current sensors disclosed herein may be utilized in connection with a motor management relay or other type of intelligent electronic device.

Abstract: An electricity meter comprises a single current sensor with a toroidal coil that has an inner bore extending substantially through the sensor. The meter also has two current conductors that form one of a pair of line-side blades of the meter. The electricity meter also has a disconnect switch with a pair of moveable contacts and a pair of fixed contacts. One of the pairs contacts is electrically connected to the current conductors. The other pair forms a respective load-side blade of the meter. One current conductor passes through the inner bore of the current sensor in a first direction relative to its line-side blade and the other current conductor passes through the inner bore of the current sensor in a substantially opposite direction relative to its line-side blade so that current passing through the conductors passes through the inner bore of the current sensor in a same direction.

Abstract: Sensor devices and related methods disclosed. One example sensor device includes a non-magnetic substrate defining an aperture structured to receive a conductor therein, a coil including a plurality of coil turns wound about at least a portion of the substrate, a first shield between the substrate and the plurality of coil turns, a second shield disposed proximate to the plurality of coil turns, opposite the first shield, such that the plurality of coil turns is disposed between the first shield and the second shield, and a filter element coupled to at least one of the first and second shields.

Abstract: An electricity meter comprises a single current sensor with a toroidal coil that has an inner bore extending substantially through the sensor. The meter also has two current conductors that form one of a pair of line-side blades of the meter. The electricity meter also has a disconnect switch with a pair of moveable contacts and a pair of fixed contacts. One of the pairs contacts is electrically connected to the current conductors. The other pair forms a respective load-side blade of the meter. One current conductor passes through the inner bore of the current sensor in a first direction relative to its line-side blade and the other current conductor passes through the inner bore of the current sensor in a substantially opposite direction relative to its line-side blade so that current passing through the conductors passes through the inner bore of the current sensor in a same direction.

Abstract: The application discloses a method and apparatus for controlling the charging of a battery in a communication device. The method includes sensing temperature of the battery while charging the battery, and determining that the temperature is greater than a predetermined temperature threshold value. The method then includes monitoring a charging status of the battery when the determined temperature is greater than the predetermined temperature threshold value. The charging status indicates an amount of charge in the battery. The method further includes determining that the amount of charge in the battery is less than a predetermined charge threshold value. The method then includes suspending charging of the battery, until the temperature falls below the predetermined temperature threshold value, when the determined amount of charge in the battery is less than the predetermined charge threshold value.

Abstract: A low-cost and high-precision current sensing device and methods for use and manufacturing. In one embodiment, the current sensing apparatus comprises a Rogowski-type coil which is manufactured in segments so as to facilitate the manufacturing process. In an exemplary embodiment, the current sensing apparatus segments comprise a number of bobbin elements that are wound and subsequently formed into complex geometric shapes such as torus-like shapes. In an alternative embodiment, bonded windings are utilized which allow the segments to be formed without a bobbin or former. In yet another alternative embodiment, the aforementioned current sensing devices are stacked in groups of two or more. Methods of manufacturing and using the aforementioned current sensing apparatus are also disclosed.

Abstract: A low-cost and high-precision current sensing device and methods for use and manufacturing. In one embodiment, the current sensing apparatus comprises a Rogowski-type coil which is manufactured in segments so as to facilitate the manufacturing process. In an exemplary embodiment, the current sensing apparatus segments comprise a number of bobbin elements that are wound and subsequently formed into complex geometric shapes such as torus-like shapes. In an alternative embodiment, bonded windings are utilized which allow the segments to be formed without a bobbin or former. In yet another alternative embodiment, the aforementioned current sensing devices are stacked in groups of two or more. Methods of manufacturing and using the aforementioned current sensing apparatus are also disclosed.

Abstract: The invention is directed to a probe for coordinate measuring apparatus. The apparatus includes measuring systems (15, 16, 17) for measuring the deviation of the flexible part (10) of the probe and a damping device damps the flexible part (10) of the probe. The damping device is embodied as at least one friction brake (19, 27) and the friction force of the friction brake is adjustable. The flexible part (10) of the probe can also be blocked by the friction brake (19, 27).

Abstract: A device is provided that allows a physical quantity of a battery pack to be determined at low cost with high accuracy with respect to variations in environmental temperature. A voltage regulator supplies a temperature detecting part and an A/D converter with reference voltages as a reference voltage for detection and a reference voltage for conversion, respectively, and supplies a storage part and a signal processing part with the reference voltage as a supply voltage. Based on signal levels obtained from physical quantity detecting parts and the temperature detecting part via the A/D converter so as to correspond to a plurality of temperatures in a predetermined temperature range, which have been stored in the storage part, a signal level obtained from the physical quantity detecting part via the A/D converter is corrected in the signal processing part.

Abstract: A moving coil measuring instrument wherein at least one end of the axis (3) of rotation of the moving coil (1) is supported so as to permit adjustment of that end of the axis (3) in a direction substantially perpendicular to the axis (3), such adjustment correcting for non-ideal operation of the instrument. The adjustment is effected by rotation of a support member (5, 7), defining the one end, rotatably mounted in a frame member (9) of the instrument, the support member (5,7) defining the one end at a location displaced from the axis (31, 37) of rotation of the support member (5, 7).

Abstract: An indicator includes an indicating member driving unit, an encoder plate, a rotational position detecting unit, and an indication position control unit. The indicating member driving unit rotates an indicating member mounted on a rotor shaft in accordance with an electrical signal input to cause the indicating member to indicate. The encoder plate rotates in association with the indicating member. The rotational position detecting unit detects an actual indication position of the indicating member on the basis of a rotational amount of the encoder plate. The indication position control unit controls the indication position of the indicating member so that the actual indication position of the indicating member detected by the rotational position detecting unit coincides with an indication position of the indicating member determined in correspondence to the electrical signal input.

Abstract: A taut band type instrument comprising a support member supporting thereon a moving coil, a pair of clips electrically connected to the moving coil and mounted on the support member in mutually spaced relation, a pair of upper and lower boss stoppers each having an integral cylindrical portion with a recess defined axially therein and mounted on a bridge, a pair of tension springs mounted respectively on the boss stoppers, a taut band attached to and disposed between the tension springs under a predetermined tension, and soldered to the clips so as to be positioned in the cylindrical portions of the boss stoppers through the recesses therein, a pointer attachment joined to the support member, and a pointer attached to the pointer attachment. The taut band is cut between the clips after it has been soldered to the clips.

Abstract: A measuring mechanism for a wide-angle moving coil measuring system and a method for its assembly. The mechanism includes concentrically arranged inner and outer pole rings. The rings terminate in arms between which a slot or spacing is arranged. The spacing is accessible from outside the mechanism in which spacing is a pre-assembled movable part having an axle or two axle-stubs, and moving coil frame is inserted into the internal space of the inner pole ring. The magnets are arranged to be positive-locked with the pole rings. Two arrangements of magnets cooperating with the pole rings are disclosed. Various embodiments and methods of assembly are disclosed.

Abstract: A magnetic system for a long scale electrical meter enables four sided sensing of a coil which is completely offset from the axis of rotation has a cylindrical core pole piece magnetically coupled to first similar poles of two magnets. The core is surrounded by an inner annular air gap defined by a coaxial inner annular pole piece which is magnetically coupled to the second poles of the magnets. Radially outward is an outer annular air gap defined by a coaxial outer annular pole piece which is magnetically coupled to the first magnetic pole. Magnetic fields in the inner and outer air gaps are radial. The outer annular pole piece is closed at opposite ends by a pair of magnetically permeable discs which also are pole pieces for the first magnetic pole. Each disc is spaced apart a distance D from the nearest flat face of the inner annular pole piece to provide axial magnetic fields. Accordingly, all four sides of the coil are active.

Abstract: A compact and symmetrically arranged construction for electrical current indicating meters of small size. The meter construction comprises a concentrically pivoted coil which encircles a rounded magnetic fluxplate.

Abstract: A compact and symmetrically arranged construction for electrical current indicating meters of small size. The novel construction for a meter comprises combinations of magnet components including the matching of a permanent magnet with a flux conducting non-permanent magnetic body.

Abstract: A compact and symmetrically arranged construction for electrical current indicating meters of small size. The novel construction for a meter comprises a unitary frame member combined with concentrically arranged components.

Abstract: A measuring mechanism for a wide-angle moving coil measuring system and a method for its assembly are disclosed. The mechanism includes concentrically arranged inner and outer pole rings. The rings terminate in arms between which a slot or spacing is arranged. The spacing is accessible from outside the mechanism in which spacing a pre-assembled movable part having an axle or two axle-hubs and moving coil frame is inserted into the internal space of the inner pole ring. The magnets are arranged to positive-locked with the pole rings. Two arrangements of magnets cooperating with the pole rings are disclosed.

Abstract: A servo controlled strip or tape linear indicating device is described in which a substantially nonresilient and nonself-supporting strip or tape is connected to servo motor means by a single attachment member at a fixed position along the length of the strip or tape. The strip or tape is freely slidable in a guide channel along its entire length and in all positions. The tape is visible with respect to a pointer through at least one transparent portion in the guide channel. The edges of the strip define with the guide channel play sufficient to prevent bunching or buckling of the strip. The servo motor means comprises D'Arsonval type motor having movable coil displaceable in an air gap of a magnetic circuit with fixed pole pieces.

Abstract: A compact meter with a unitary bridge including magnet support legs to which a magnet is clamped by a magnetically permeable plate and a U-shaped magnet support. Locating surfaces on the bridge cooperate with locating surfaces on the magnet, on the plate, and on the magnet support to locate these elements with respect to the bridge and the rotor. The magnetically permeable plate extends through the coil, and the region below the magnet is substantially unobstructed so that magnets of different thicknesses can be substituted, while using the same bridge, rotor and coil assembly, and plate. In a preferred embodiment the magnetically permeable plate has offset ends which permit inverting the plate to accommodate magnets of two different thicknesses while alowing the use of the same magnet support. The rotor is of composite, solder-free and cement free construction, and includes a unique clamp together arrangement for securing the several parts of the rotor together in proper positional relationship.

Abstract: In a moving-coil electrical instrument the electric coil is rotatably mounted on a spindle for angular displacement about the axis of the spindle. The ends of the spindle are located in respective bearings disposed in apertures of a frame and each bearing has a part that is angularly displaceable about the axis of the spindle between a first angular position in which the part supports the spindle and a second angular position in which that part is removable from the respective aperture. The coil is mounted on a support through which the spindle extends and carries a body to counter-balance the coil. The center of mass of this body is spaced from the plane which includes both the center of mass of the coil and the spindle axis. The support also carries a counterpoise body that is spaced from the counter-balance body about the spindle axis.

Abstract: A compact meter with a unitary bridge including magnet support legs to which a magnet is clamped by a magnetically permeable plate and a U-shaped magnet support. Locating surfaces on the bridge cooperate with locating surfaces on the magnet, on the plate, and on the magnet support to locate these elements with respect to the bridge and the rotor. The magnetically permeable plate extends through the coil, and the region below the magnet is substantially unobstructed so that magnets of different thicknesses can be substituted, while using the same bridge, rotor and coil assembly, and plate. In a preferred embodiment the magnetically permeable plate has offset ends which permit inverting the plate to accommodate magnets of two different thicknesses while allowing the use of the same magnet support. The rotor is of composite, solder-free and cement free construction, and includes a unique clamp together arrangement for securing the several parts of the rotor together in proper positional relationship.

Abstract: A moving-coil measuring system with a large pointer deflection, utilizing a pole ring having a projection, a pole plate with a projection, a permanent magnet arranged between the projections, and a moving coil embracing the pole ring. The shaft of the coil rotates in two bushings which are concentric with respect to the pole ring. One of the bushings is mounted in the pole plate and the other bushing is mounted in a support fastened to the pole plate.

Abstract: A moving coil electrical meter mechanism has a substantially rectangular coil and a magnetic structure surrounding first, second and third sides of the coil and defining first, second and third magnetic flux filled air gaps containing magnetic fields so oriented that the forces exerted on the first, second and third sides of the coil are in the same direction. The rectangular coil is mounted to rotate under the influence of the magnetic fields around an axis adjacent to the fourth side of the coil, with the magnetic fields remaining orthogonal to the coil sides during rotation.

Abstract: A long-scale moving coil instrument of the type comprising a frame, means including an arcuate core member secured to the frame for forming a magnetic circuit path, and a mounting member carrying a moving coil over the core member and being suspended for rotation relative to the frame by means of tension bands secured to bosses on the mounting member. The instrument is characterized by a pair of boss-stoppers made of an elastic, electrically insulating material. Each boss-stopper supports a tension spring, lies in a through-hole provided in the frame, and has a central passage through which the tension bands extend for connection to the tension springs, the passages additionally receiving the bosses on the coil mounting member to limit movement thereof. With this arrangement, electrical connections to the moving coil may be effected by means of the tension bands while maintaining the electrical connections isolated from the frame with the electrically insulating boss-stoppers.

Abstract: A moving-coil electrical instrument in which an electric coil mounted for angular displacement about an axis embraces an annular core which is disposed between radially-spaced walls of a housing to define two radially-spaced, annular air-gaps through which extend the inner and outer limbs respectively of the coil. The inner air-gap is made shorter (in the direction of the lines of magnetic flux) than the outer air-gap, so that any change in the force induced into the outer limb of the coil, arising from, for example, radial misplacement of the core, is accompanied by a greater change in the force induced into the inner limb. Thus the difference in the radial distances from the axis of the inner and outer limbs is offset, and the changes in the torques induced into the inner and outer limbs balance one another. Alternatively, or additionally, the inner air-gap may be made wider (measured parallel to the respective limb of the coil) than the outer air-gap.

Abstract: A long-scale meter movement of the type in which one leg of the moving coil oprates within an annular gap between an outer pole and a cylindrical core. In the new meter movement, the outer pole is integral with the return ring, in a generally circular configuration. The coil support frame is likewise of unitary construction, with a central portion extending through the return ring in the region of the magnet block and having integral coil pivot supports front and rear. The central frame portion has an aperture for the magnet block, with separate supports for the core extending through the aperture in interlocking relation with the frame. The construction of the parts is such that the frame, coil, core and magnet may be fitted together to form a subassembly which is inserted as a unit into the one-piece outer pole and return ring.