Bridgestone Corporation

Renesas Technology Corp.

Mitsuya Tanaka

Yasuo Kurachi

Tasuku Saito

Yuichi Ishino

Hironori Iwasaki

Takao Ono

Osaki Toshiyuki

The invention provides a memory system that allows connection of a memory controller to each of plural memory modules in an equal distance. The memory system includes a memory controller, three memory modules, a single socket which the three memory modules can be inserted into and pulled out from, and a mother board on which the memory controller and the socket are mounted, etc. And, the memory controller and each of the memory modules are connected in an equal distance through the socket pins of the socket that are branched from bus wirings on the mother board. The socket is furnished with three sets of the plural socket pins in a radial form, in correspondence with each of the memory modules. The socket has two types of structures: one has three module-board contacts for one board-bus connection, and the other has one module-board contact for one board-bus connection.

Memory system with a socket having socket pins for mounting memory modules

Electrorheological fluids display swift and reversible increase in apparent viscosity under application of an electrical potential difference to the fluid, and are composed generally of electrical insulating oily medium and dielectric fine-particles dispersed therein. It is an object of the present invention to provide an electrorheological fluid capable of exhibiting enhanced electrorheological effect with smaller electric power consumption. Electrorheological fluid according to the present invention comprises particulates having a specific gravity of not smaller than 1.2 and water content of not larger than 4 wt. % dispersed in an electrical insulating oily medium havingf P.dbd.N bonds in the molecule.

Electrorheological fluids comprising carbonaceous particulates dispersed

Electrorheological fluids display swift and reversible increase in apparent viscosity under application of an electrical potential difference to the fluid, and are composed generally of electrical insulating oily medium and dielectric fine-particles dispersed therein. At the initial stage of development, electrorheological fluids are prepared by dispersing water-carrying hydrophilic particulates in an electrical insulating oily medium. However, there are such defects as a restriction on usable temperatures so as to avoid evaporation or freezing of the water, an extreme increase in the electric current flow as the temperature raises, inferior stability caused by transfer of water etc. It is an object of the persent invention is to provide nonaqueous type electrorheological fluids having improved electrorheological property. The electrorheological fluid of the present invention is a nonaqueous type electrorheological fluid which comprises organic or inorganic particulates containing not more than 1 wt. % of water and dispersed in an oily medium superior in electrical insulation, wherein the improvement is that said fluid comprises from 0.001 wt. % to 10 wt. % of a compound having a functional group containing at least one atom selected from the group consisted of oxygen atom, nitrogen atom, sulfur atom and phosphorous atom.

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Kodaira, Japan

Mitsuya Tanaka