Onoda Cement Co., Ltd.

Rikagaku Kenkyusho

Other

Tokyo Shibaura Denki Kabushiki Kaisha

Haruo Tateno

Tsutomu Itoh

Hiroshi Saitoh

Hideo Nagasaka

Masayuki Kitoh

Susumu Matsuno

Masahiro Yamamoto

Yusuke Mitsuyoshi

Akira Nakamura

Hiroshi Obana

Masanori Yoshikawa

Akira Bunya

A plasma gas is injected from a vortex flow forming hole defined to an insulator in a tangential direction with respect to the circumference of the arc column of a torch to enable the axis of the arc column to be aligned with the axial of the torch and a vortex annular gas sheath is coaxially formed to thereby narrow down a plasma flame. Further, the torch comprises the above insulator and a casing which are connected in series each other.

Multiple torch type plasma generation device and method of generating

An arc is formed between a pair of discharge electrodes, a plasma gas separated from a raw material gas flowing substantially in parallel to the arc to form a plasma flame, the raw material gas flowing to the upstream within the plasma flame, and a diamond being deposited on the substrate downstream within the flame.

Method for making diamond and apparatus therefor

A single torch-type plasma spray coating method wherein a gas flow in a nozzle of a plasma torch is made to be a laminer flow, thereby the plasma flame jetted from the end of the plasma torch is modified to be a laminer flow flame, the plasma is separated from the plasma flame which contains liquid droplets of molten spray coating material and runs toward an object to be worked by means for separating plasma arranged immediately before said object to be worked, and remaining droplets of molten spray coating material impinges on said object to form a coating film thereon, and an apparatus therefor.

Single torch-type plasma spray coating method and apparatus therefor

A multiple torch type plasma spray coating method and a multiple torch type plasma spray coating apparatus in which a main torch and an auxiliary torch are disposed so that their center axes may intersect each other, is improved in that laminar flow plasma is generated by the main torch, spray coating material is charged into the plasma flame in the proximity of the outlet of the main plasma torch, the plasma flame is blown onto an object to be treated, plasma is separated from the plasma flame just in front of the object to be treated, and the then left spray coating material is made to deposit onto the object to be treated.

Multiple torch type plasma spray coating method and apparatus therefor

A pipelining information processor which includes a memory, an instruction buffer, an execution stage, a logical address generator coupled with the instruction buffer, a physical address generator, and logic for fetching an instruction from the instruction buffer to the execution stage. The input to the physical address generator is selected by a selector as either a logical address of the operand of a prefetched instruction or a logical address of an instruction to be prefetched. If the prefetched instruction requires a memory access, the logical address of its operand is selected, otherwise the logical address of a new instruction to be prefetched is selected. Control logic sequentially moves instruction addresses through the selector, the instruction buffer, the logical address generator, and the physical address generator so that logical address generation, physical address modification, fetching a prefetched instruction from the instruction buffer to the execution stage, and execution may occur in parallel on successive instructions.

Instruction prefetch system

Disclosed is a method of operating a plasma generating apparatus including at least one multi-bushed torch unit. The ratio of inside gas flow rate-to-outside gas flow rate in the channels of the torch unit are experimentally determined so as to assure the alignment of the electric arc in the torch unit, and the plasma generating apparatus is operated with the gases flowing at the so-determined flow rates.

Method of operating a plasma generating apparatus

Disclosed is an improved method and apparatus for operating an arc-transfer type torch having a cathode rod and two coaxial annular bodies. According to this invention an inactive gas is supplied to the annular space between the cathode rod and the inner annular body, at a very small flow rate, and an active gas such as oxygen is supplied to the annular space between the inner and exterior annular bodies at a relatively large flow rate. The plasma is composed of an active gas of high concentration heated by a transfer arc. In the method of this invention dross-less cutting is performed. Also an arc current can be increased without deforming the cathode rod of the torch, and therefore the cutting speed can be increased by raising the arc current.

Growing community of inventors

Kiyose, Japan

Haruo Tateno