Abstract: A transient noise reduction filter comprises a cable including one or more twisted pairs of conductors and one or more common mode chokes (CMCs). The one or more CMCs a formed from respective pluralities of turns of the cable.

Abstract: A vacuum valve includes a fixed side electrode on a fixed side current-carrying shaft and a movable side electrode on a movable side current-carrying shaft. An opening and closing unit is coaxially disposed with the movable side current-carrying shaft, and drives the movable side current-carrying shaft. A chattering suppression structure is coaxially disposed with the fixed side current-carrying shaft on the fixed side of the vacuum valve, and suppresses chattering. The opening and closing unit includes an electromagnetic operating mechanism which drives the movable side current-carrying shaft when energized. A contact pressure spring is coaxially disposed with the electromagnetic operating mechanism, and applies contact pressure between the movable side electrode and the fixed side electrode during contact closing of the vacuum valve.

Abstract: A switching mechanism for a gas insulated switchgear includes: a stationary contactor having a stationary arc contactor portion and a stationary main contactor portion; a movable arc contactor which is linearly movable; a movable main contactor which is linearly movable; a cylinder rod which provides driving power for linear motion to the movable main contactor and the movable arc contactor; a connecting rod which is connected to the cylinder rod; a stationary cylinder having a hollow guide tube portion for guiding the linear motion of the cylinder rod and the connecting rod; and a spring which charges elastic energy when the movable main contactor and the movable arc contactor move to the contacting position and discharge the elastic energy when the movable main contactor and the movable arc contactor move to the separating position.

Abstract: A device for protection against voltage surges comprises a stationary electrode and a movable electrode arranged facing an arc extinguishing chamber. The movable electrode is driven by a mechanisms, by an electromechanical actuator and/or by an electromagnetic circuit. At rest, the movable electrode is situated at a distance from the stationary electrode. When a voltage surge occurs between the electrodes, an arc arises and extends in the chamber in which it is extinguished. If the arc continues, in particular in the case of a follow current of high energy, the movable electrode is driven to a disconnected position moving away from the stationary electrode, which has the effect of lengthening the arc even more in the chamber to facilitate its extinction and perform disconnection of the circuit. A pair of contacts may be associated in series to the electrodes, one of the contacts being stationary and the other being fixedly secured to the movable electrode. A spark gap can also be associated to the electrodes.

Abstract: Disclosed is a lead wire holding member. In the disclosed invention, the holding member for holding a plurality of lead wires together comprises one or more holding plate, each plate having a hole for receiving the plurality of lead wires all together and a slit formed from the hole to the outer edge of the holding plate. Accordingly, lead wires can be easily held together and a holding member that is less costly and easy to work with can be provided.

Abstract: A component mounter for picking up a component and mounting it on a board using a transfer head. A position of solder paste printed on an electrode on a board is previously measured and a measurement result is stored. Mounting coordinates for mounting the component using the transfer head is calculated based on this measurement result. In the mounting operation, the transfer head is controlled using mounting coordinates determined based on the solder printing position so as to mount the component on each electrode on the board. This prevents the occurrence of positional deviation between the mounted component and printed solder paste. Defective mounting, which may occur in a reflow process due to positional deviation, is thus preventable.

Abstract: Collapsible structures are provided with enhancements and other features that impart additional utility or amusement value to the basic underlying structure. The collapsible structure has at least one panel, with each panel having a foldable frame member having a folded and an unfolded orientation, and with a fabric material covering portions of the frame member to form the panel when the frame member is in the unfolded orientation. An electrical component can attached to the fabric material, and an electrical coupling connected to the electrical component. Alternatively, a two-dimensional or three-dimensional object can be attached to the fabric material.

Abstract: Electric-component mounting system for mounting an electric component on a substrate, including a movable portion movable relative to a main body, a motion-transmitting member disposed on the main body and operable to transmit to the movable portion a linear motion generated by a drive device, such that thermal expansion of the motion-transmitting member causes a positioning error of the movable portion, an object fixedly disposed on one of the main body and the movable portion, an image-taking device fixedly disposed on the other of the main body and the movable portion to take an image of the object, the object and the image-taking device being positioned relative to each other such that an error of relative positioning therebetween detected on the basis of the image of the object substantially represents a positioning error of the object due to thermal expansion of the system, and a controller operable to determine a drive signal to operate drive device, on the basis of the image of the object, so as to re

Abstract: In a closing magnetic circuit, when a movable contact is in contact with a fixed contact and a switching device is closed, N and S poles of a permanent magnet attract the fixed member in a direction in which the movable contact is pressed against the fixed contact. In an opening magnetic circuit, when the movable contact is separated from the fixed contact and the switching device is open, one of the N and S poles of the permanent magnet attracts the fixed member in a direction in which the movable contact is separated from the fixed contact. An operating electromagnet winding increases and decreases the magnetism in the closing magnetic circuit and opening magnetic circuit. With this configuration, it is possible to realize an operating apparatus for a switching device using a simple mechanism and assure a stable operation by producing a great contact load.

Abstract: The severity of the problems of transmitting high speed data over a regular twisted wire pair are legendary. These problems arise from a variety of conditions, including the capacitance of the wire (which increases with length) and the propensity of unshielded wire to pickup high induced voltages. An arrangement is disclosed that is suitable for short, as well as long, wire distances and which also effectively eliminates the interference problem caused by induced voltages, including those causes by electrostatic discharge. This arrangement passes two twisted wire pairs through a series of ferrite cores. The twisted wire pairs coming out of the ferrite cores are terminated such that one of the pairs is connected to ground while the signal carrying twisted pair is connected to a small signal balun coil, pulse shaping circuit and low pass filter.

Abstract: A disconnector for a surge arrester explosively separates an electrical lead wire, normally a ground lead wire, from the arrester to prevent a permanent fault and to provide an indication of a failed arrester. The disconnector includes an elongated, frangible insulating housing having an elongated opening disposed along and parallel to the longitudinal axis of the insulating housing; a first electrically conductive terminal disposed at a first end of the opening; a second electrically conductive terminal disposed at a second end of the opening; means for forming an arc gap disposed between the first and second terminals, including an arc gap spacer and an arc electrode being either generally flat or including a raised portion; and an explosive cartridge disposed between the first and second terminals and in contact with the arc electrode.

Abstract: A surge arrester including an outer porcelain housing and an ablative heat shield liner is disclosed herein along with a number of techniques for making the surge arrester break resistant. In accordance with one of these techniques, a blow out or relief valve is provided on at least one end of the arrester housing for venting internal pressure due to electrical arcing therein. In this embodiment, an arrangement is provided for preventing the components therein from escaping during the venting procedure. The liner is constructed of a material which is sufficiently ablative to produce its own gas within the housing in response to electrical arcing therein.

Abstract: A particle charging apparatus (Boxer-Charger) is constructed by disposing electrode assemblies each consisting of corona discharge electrodes and excitation electrodes, in parallel to each other with a charging space interposed therebetween. An a.c. voltage is applied between the corona discharge electrodes in the respective assemblies to establish a main electric field in the charging space. When the a.c. main voltage has entered a half cycle of particular polarity such as, for example, negative polarity, an excitation high frequency voltage including fast-rising pulses having a pulse duration time of 1 ns-1 ms is applied between the corona discharge electrodes and the excitation electrodes in the assembly to generate a creeping streamer on the corona electrode surface and thereby form a two-dimensional plasma source.