Fujitsu Corporation

Nippon Steel Corporation

Fujitsu Semiconductor Limited

Kazuo Aoki

Hitoshi Ogawa

Hiroyo Haga

Eishirou Kawana

Toshio Takamatsu

Koichi Ishida

Takeshi Sato

A communication data controller is provided which is capable of correctly retransmitting transmission data even if a block of the transmission data exceeding a FIFO (First-In First-Out) memory is written in an overwriting manner to the FIFO memory. The memory stores transmission data to be transmitted to a communication device. Transmission data stored in the memory is written and read to and from the FIFO memory by a CPU (Central Processing Unit). A DMAC (Direct Memory Access Controller) driver, when a request for retransmission of a block is made in the case where the block of transmission data exceeding a capacity of the FIFO memory is written to the FIFO memory, drives the DMAC and transfers the block being stored in the memory to the communication data controller.

Communication data controller

A buffing apparatus which can buff a thin plate work without causing buckling. The buffing apparatus comprises a plurality of buffing rolls removably secured in a predetermined spaced relationship from each other to a shaft which is driven to rotate, a backup roll disposed in parallel to the buffing rolls and extending over the overall length of all of the buffing rolls, and a holding roll disposed at least between each adjacent ones of the buffing rolls. The holding roll is positioned such that the axis thereof is positioned on a straight line interconnecting the center of transverse section of one of the buffing rolls and the center of a transverse section of the backup roll and an outer periphery thereof substantially contacts with a contacting plane of the buffing rolls.

Buffing apparatus suitable to buff thin plate work and controlling

An apparatus for monitoring and controlling a welding phenomenon in an electric resistance welding process, which comprises a welding characteristics measuring instrument for carrying out digital measurement of at least one of high frequency welding characteristics, a welding phenomenon monitor circuit for detecting variations in the welding characteristics, and a welding phenomenon controller circuit for automatically adjusting a parameter of a welding power source or other welding conditions, wherein the welding characteristics include an oscillating frequency and an oscillating period of a high frequency used for the welding, and a phase difference between a high frequency voltage and a current. Changes in the welding characteristics occur in correspondence with the occurrence of periodic fluctuations in the shape of the high frequency welding current circuit formed in the material to be welded during high frequency electric resistance welding process.

Apparatus for monitoring and controlling a welding phenomenon in an

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Kawasaki, Japan

Kazuo Aoki