Matsushita Electric Works, Ltd.

Takaaki Chuzawa

Takao Miyai

Kenichi Takamatsu

Tomoyuki Nakano

Riichi Uotome

Hidenori Kakehashi

Takehiko Toguchi

Takashi Kanbara

Kazuhiko Kinutani

Masaki Satou

Toru Fujiwara

Ritsu Yamamoto

Toshiyuki Suzuki

Hideya Kondo

Nobuhiro Kitamura

Kunimitsu Nakano

Satoshi Kajiyama

Kiwamu Shibata

Tetsuyasu Kawamoto

Kiyoshi Goto

Masaru Ohmuro

Jun Saito

Hideki Kishi

Takeshi Ono

Kazuhiko Kinutant

An electromagnetic device and a high-voltage generating device which are thin and improved in the characteristics are provided in which a magnetic core is made of a cylindrical form of a ferrite material having a higher intrinsic resistance. A winding is provided by winding a flat rectangular wire conductor in an edge-wise winding form directly on substantially the entire length of the magnetic core. As any insulator such as a coil bobbin is not needed between the flat rectangular wire conductor and the magnetic core, the winding can be decreased in the overall size or thickness thus contributing to the dimensional reduction of the electromagnetic device. Also, as its flat rectangular wire conductor is wound directly on the magnetic core, the winding can be minimized in the length and thus the overall resistance. Moreover, as there is no gap between the winding and the magnetic core, the self-inductance can be reduced while the size and the number of turns of the winding remain unchanged.

Electromagnetic device, high-voltage generating device, and method for making the electromagnetic device

An electromagnetic device and a high-voltage generating device which are thin with improved characteristics includes a magnetic core of a cylindrical form of a ferrite material having a high intrinsic resistance. A winding is provided by winding a flat rectangular wire conductor in an edge-wise winding directly on substantially the entire length of the magnetic core. As an insulator, such as a coil bobbin, is not needed between the flat rectangular wire conductor and the magnetic core, the winding can be decreased in the overall size or thickness thus contributing to the reduction in dimension of the electromagnetic device. Also, as its flat rectangular wire conductor is wound directly on the magnetic core, the winding can be minimized in the length and thus the overall resistance.

Electromagnetic device and high-voltage generating device and method of producing electromagnetic device

A lamp socket and a discharge lamp lighting device are enabled to be dimensionally minimized by forming a socket body of the lamp socket with an integral synthetic resin molding of a case housing therein a starting circuit section and socket and connector sections, disposing a plurality of lead frames in the case, connecting the lead frames to primary and secondary windings of a pulse transformer, thereafter housing in the case electronic parts with their terminals placed in recessed grooves of the lead frames, and connecting the lead frames and terminals to constitute the starting circuit section.

Lamp socket and discharge lamp operating device

In the setting operation conducted by the handle,which is an operating section, an upper portion of the portion,&prime; of the slidable T-post,is pushed by the end portion of the cam,, and the slidable T-post,is moved. In accordance with the movement of the card,, the suction cup block,is elastically deformed, and the suction cup,is held by the body,by a holding force of the suction cup,. The body,is composed of a porous body, and air flows from the ventilation hole,into a space formed between the suction cup,and the body,, via the body,. The slidable T-post,is biased ahead by the return spring,. When the releasing operation is conducted by the handle,, the cam,is rotated, and the end portion of the cam,is separated from the end of the portion,&prime; to be pushed. After that, when the intensity of the holding force of the suction cup,to the body,is decreased lower than that of the spring force of the return spring,, the slidable T-post,is moved ahead, so that the card member,pushes up the movable contactor

Delay switch with delay unit

A sealed switch has a vessel defining therein a hermetically sealed space which receives a pair of fixed contacts and a movable contact bridging the fixed contact. The movable contact is movable between an ON-position of closing with the fixed contact and an OFF-position of separating from the fixed contacts. Hydrogen gas or hydrogen rich gas is filled in the sealed space in order to suppress arc development between the movable and fixed contacts. The plunger carries at its axial one end the movable contact and carrying at the other axial end an actuator which moves the plunger axially for movement of the movable contact from the OFF-position to the ON-position. An over-travel spring is provided to give a bias for moving the movable contact relative to the plunger in order to develop a contacting pressure between the movable and fixed contacts. The over-travel spring is supported to a spring holder secured to the plunger. The plunger is formed with a threaded portion which extends through the actuator to allow the plunger to move axially relative to the actuator for adjustment of a contact gap between the movable and fixed contact, and the spring holder is formed with stopper protrusions which project in abuttable and slidable relation to the interior surface of the vessel such that the movable contact is prevented from rotating together with the plunger. Accordingly, the spring holder is best utilized to restrict the movable contact from rotating together with the actuator to enable an easy adjustment of the contact gap simply by rotating the actuator.

Sealed contact device with contact gap adjustment capability

A sealed contact device includes a sealed contact section having a sealed container defining therein a gas-tight space together with a bellows for housing therein electrodes and sealing therein a gas preferably consisting mainly of hydrogen, the electrodes including fixed electrodes and movable electrodes engageable with and separable from the fixed electrodes, a contact pressure spring biasing the movable electrodes in engaging direction with respect to the fixed electrodes, a resetting spring biasing the movable electrodes in separating direction from the fixed electrodes, and a movable shaft projected at an end out of the sealed container and coupled at the other end to the movable electrodes; a driving member providing at a movable part a drive force for driving the movable shaft in the direction of engaging the electrodes; and a relaying member interposed between the movable shaft of the sealed contact section and the movable part of the driving member and having a regulating element for regulating driving position of the movable shaft, the relaying member being coupled to the movable part and including a coupling element coupled through the regulating element to the movable shaft.

Sealed contact device and operating mechanism

Circuit breaker

A circuit protecting sensor comprises a cylinder divided into two cylinder members with a common magnetic head interposed between them, one of which members contains a viscous fluid sealed therein and an oil plunger and the other member contains an operating plunger projecting partly out of the cylinder, and the respective plungers are biased by a spring normally away from the magnetic head. When a short-circuit current is detected by a coil wound on the cylinder, the operating plunger is immediately attracted by the magnetic head independently of the oil plunger prior to its attraction to the magnetic head.

Circuit protecting sensor

Growing community of inventors

Hirakata, Japan

Takaaki Chuzawa