The Furukawa Electric Co., Ltd.

Other

Jfe Steel Corporation

Masami Iwasaki

Takeshi Yokota

Shinjiro Kaneko

Kazuhiro Seto

Reiko Sugihara

Kazumi Matsui

Takashi Takasue

Shinsuke Morikawa

Akira Sekiya

Yasuhisa Furutaka

Tetsuya Takagaki

Shunichi Yamashita

Keiji Ueda

Norifumi Ohtsuka

Yasuo Hibino

Minoru Otobe

Tsuyoshi Takaichi

Masaki Oda

Disclosed is fluorocarbon-based dry etching gas which is free of global environmental problems and a dry etching method using a plasma gas obtained therefrom. The dry etching gas includes a fluorinated ether of carbon, fluorine, hydrogen and oxygen and having 2-6 carbon atoms.

Dry etching gas

An electric power supplying system for a continuous transit system by magnet (CTM) in which magnets attached to under parts of a certain number of cars comprising the trains and energized regularly are attracted to magnetic belts of a plurality of magnetic belt conveyor units arranged at predetermined intervals along a running track thereby successively drawing and running the trains. There is provided a trolley wire which is divided at least into a certain number of insulated sections at intervals of a predetermined block section length and a predetermined no-load current is supplied to the insulated sections of the trolley wire. When the current flowing to each insulated section of the trolley wire is within a predetermined range, the magnetic belt conveyor unit group corresponding to a block section following the insulated section with respect to the direction of train movement is operated.

Electric power supplying system for a continuous transit system by

A belt conveyor transportation system includes a plurality of belt conveyor units each having an endless belt whose main constituent element consists of a magnetic material so as to be magnetically attractive with magnets, and the conveyor units are continuously arranged lengthwise along a desired transportation network layout to form a conveyor line. The conveyor units of the conveyor line drive their magnetic belts separately or in groups each including a number of the units at an independent speed. A moving body or bodies are arranged to move along the conveyor line, and the moving member includes a magnet system. By virtue of the magnetic attraction between the conveyor units and the magnet system, the moving member travels along the conveyor line while being hauled by the magnetic belts of the conveyor units at their respective speeds.

Belt conveyer transportation system utilizing magnetic attraction

Belt conveyor transportation system utilizing magnetic attraction

A control system for automatic operation of travelling objects through a power supply system without using any signal communication systems. Either a DC power source or three-phase AC power source is utilized as a power source. With the system employing a DC power source, three trolley wires are installed, one a negative and two positive. Each of the positive wires is divided and insulated into sections of a predetermined length; the positive feeding trolley wires in each section is always supplied with the DC power, and the power to the other positive feeding trolley wire is switched on and off depending on the movement of travelling objects. Each travelling object is supplied with power by the three trolley wires has a DC motor, and when one of the positive wires has no voltage, this is detected and the braking is effected. The travelling object entering a station is automatically decelerated and stopped. When employing a three-phase AC power source, four trolley wires are installed, of which one is a neutral trolley wire and the remaining three trolley wires are with phases of AC power. Each of these three AC feeding trolley wires is divided and insulated into sections of a predetermined length, one of the three trolley wires is always supplied with the phase power, and power to the other two is switched on and off responsive to movement of the travelling objects, which travelling objects are equipped with an induction motor having star connected field coils and as power to the two AC feeding trolley wires is switched off, the unbalance current in the field coil flows to the neutral trolley wire causing braking.

Travelling object control system utilizing power control

Growing community of inventors

Tokyo, Japan

Masami Iwasaki