Sumitomo Electric Industries, Limited

Other

Keisoku Giken Co., Ltd.

Susumu Ihara

Katsumi Mizuuchi

Hiroyuki Yoshimoto

Takanobu Suzuki

Akira Kobayashi

Yoshinobu Kashiuchi

Koichi Nishimune

Shigeaki Yoshida

Isamu Jinguji

Minoru Uesugi

Kizashi Nakamura

Shinji Tsunoda

Hideo Nishiumi

The present invention provides a transmission line control system capable of disconnecting and reconnecting a terminal communication apparatus from and to a main transmission line reliably and quickly at such occasions as a fault in the line, correction of the fault, cutting off and turning on of a power source. The control system according to the present invention includes, for each terminal communication apparatus, two subsidiary communication lines, a by-pass, two signal monitoring devices, and four change-over switches. Each signal monitoring device monitors data signal passing through the subsidiary transmission lines and controls the switching operation of the change-over switches so that, upon occurrence of a line fault or a disconnection of the power source, only the terminal communication apparatus related to the trouble is disconnected from the main transmission line and that, upon correction of the line fault or turning on of the power source, said terminal communication apparatus is reconnected with the main transmission line. In order to perform such control operation properly, constants deciding the lengths of time of operation of the signal monitoring devices are determined to satisfy given inequalities.

Transmission line control system with by-pass control

An improved electrode assembly for a moisture meter of the electrostatic capacity type. The electrodes include a high-voltage electrode and a plurality of ground electrodes. The high-voltage electrode is insulated or electrostatically shielded at the base thereof in order to ensure high accuracy of the moisture meter.

Electrode assembly for a moisture meter

An improved electrode assembly for an electrostatic type moisture meter for powdery or granular material includes an insulator, a high-tension electrode in the form of a stick mounted on the insulator so as to vertically extend therefrom, and a plurality of earth electrodes in the form of sticks arranged around and in parallel with the high-tension electrodes. The high-tension electrode has a protection insulator at the tip thereof. The insulator has air-emitting openings for emitting air therefrom to the base portion of the electrodes to remove the material remaining at the base portion of the electrodes after a measurement. The insulator preferably has an outer face sloped at its periphery.

Electrodes for moisture meter

The accuracy of an optical measuring system is improved by directing a parallel light beam across the surface of a moving object in a direction perpendicular to the direction of movement so that movement of the object in the direction of the light beam will not affect the measurement accuracy. For measurement purposes, the silhouette of the object can be roughened by coating with an easily removable foreign substance such as wheat flour.

Method of measuring the quantity of movement of an object

A method and an apparatus for detecting the internal cavities in a continuous casting bar in which two opposite surfaces of a casting bar delivered from a continuous casting machine are held between a pair of rollers each having a hollow portion and are pressurized at a predetermined pressure thereby, and an amount of transmission of an ultrasonic wave having a predetermined frequency passing through the casting bar is detected by means of an ultrasonic wave device for transmission and an ultrasonic wave device for reception which are provided respectively in the hollow portions of the rollers to allow the ultrasonic wave to pass through the casting bar running through the rollers, thereby to detect the internal cavities in the casting bar.

Method and apparatus for detecting internal cavities in casting bars

A method of producing a copper clad steel wire, which comprises the steps of preparing a 5 to 15 mm diameter steel rod and a 21 to 66.7 mm width copper tape; continuously supplying the steel rod and the copper tape separately and cleaning the surfaces thereof; forming the copper tape in tubular form such that the copper tape can cover the steel rod while supplying the steel rod and the copper tape in parallel, and welding the edges of the copper tape in a non-oxidizing atmosphere; sinking the tubular copper tape sufficiently for the copper tape to substantially come into contact with the steel rod to form a copper clad steel rod; cold-drawing the copper clad steel rod and/or hot working the clad rod at a temperature of 400.degree. to 800.degree. C. to reduce its cross-sectional area by more than 20%; and then annealing the copper clad steel rod at a temperature of 300.degree. to 1050.degree. C.

Method and apparatus for producing copper clad steel wire

The present invention relates to an apparatus for precise measurement of the length of long length materials which measures the length of a long length material such as electric wire, cable, etc. basically unit length by unit length in an inchworm manner by applying magnetic marks on said material and sensing them downstream while making correction for elongation of the material due to temperature and tension, and which measures only an odd length less than the unit length by means of, for example, a counter wheel.

Growing community of inventors

Osaka, Japan

Susumu Ihara