Hitachi, Ltd.

Nishihara Environmental Sanitation Research Corporation

Suzuki Sangyo Co., Ltd.

Hitachi Plant Engineering Construction Co., Ltd.

Tomio Suzuki

Tsuyoshi Takahashi

Yuji Nishimura

Kouki Uefune

Hiroshi Nishida

Masami Suzuki

Masahiko Sega

Tetsuo Yuki

Kimie Watanabe

Hiroyuki Naito

Toshio Saito

Naoki Kodama

Fumio Kugiya

Kazuo Sakai

Takuji Ogawa

Kazuo Nakagoshi

Masao Iwakura

Kaoru Watanabe

Isao Kobayashi

Jyousei Shimizu

Jun Naruse

Hideyuki Kimura

Nobuyuki Okunaga

Jiro Kaneko

Takashi Matsuki

Tatsuya Ishigaki

Katsumi Kawamura

Mitsushi Endo

Noboru Hayakawa

Youichi Hamamoto

Hidenao Kawai

Toshiaki Kojima

Tatsuo Yoshitomi

Toshio Ohdaira

Teruo Takizawa

Kazuo Yamagami

Yoichi Nakagawa

Shuichi Kaizyo

Yoshiteru Nagatani

Kozo Takahashi

Chuma Akira

Noriyuki Hayakawa

Teruyoshi Sahara

Toshiaki Taniguchi

Kazuo Yukawa

Shin-ichi Tabata

Naoto Uemura

Hiroyuki Mitsuhashi

A magnetic disk drive has a housing for a 3.5 inch form factor and disk media of a diameter for a 2.5 inch form factor. The smaller disk media rotate at a high speed while consuming low electric lower and generating less heat while providing for quick access speeds. Usually, when the magnetic disk media are rotated at a higher speed, the electric power consumption and heat generation are increased because of the load increase. This problem is avoided with the use of cooling fins placed about the periphery of the disk media. Further, the smaller size disk media enable a decrease in torque loss during on-load rotation with the media, and a decrease of electric current to the spindle motor during rotation.

Disc drive having 3.5 inch form factor housing and 2.5 inch form factor disk media

Provided is a solvent-free two-liquid type normal temperature curable liquid polymeric composition which comprises (I) as a first liquid, a liquid composition comprising (A) an organosiloxane component comprised of (a) one or more liquid organopolysiloxanes of the general formula: ##STR1## wherein R.sup.1 stands for a hydrogen atom, an alkyl group with 1-5 carbon atoms or an acyl group; R.sup.2 to R.sup.6 are the same or different and each stands for a hydrogen atom, --OR.sup.1 or a univalent hydrocarbon group; and n for an integer of 1-15, (b) a crosslinking agent comprising one or more organometallic compounds of the general formula:

Solvent-free two-liquid type normal temperature curable liquid polymer

A magnetic disk device has a large capacity with a small and thin structure and includes a spindle system, an actuator system, a control package for controlling the systems, and a PCMCIA connector. The spindle system is of an in-hub structure wherein two magnetic disks are rotated in inside diameter portions of the magnetic disks. The actuator system has sliders mounting magnetic heads for writing and reading magnetic information to and from the magnetic disks, guide arms and suspension structures. The suspension structures also include a coil, a magnetic circuit for imparting a drive force in cooperation with the coil, a coil holder for supporting the coil, a pivot sleeve for rocking the guide arms, the coil holder and spacers which are integrally laminated to each other, bearings and a pivot shaft. The PCMCIA connector connects to the control package and is fixed by the housing and a package cover.

PC card type magnetic disk device

A magnetic disk apparatus includes a link mechanism constructed by at least a flexible portion and a hard member and one end of the link mechanism is attached to a fixing unit and the other end is attached to a hard disk assembly so that the flexible portion of the link mechanism is located on a straight line which passes through the center of gravity of the hard disk assembly, thereby having a sufficient rigidity for a disturbance in the straight line direction which acts on the HDA (Hard Disk Assembly) and reducing a natural frequency of the HDA for the disturbance in the rotating direction of the HDA.

Supporting mechanism of disk unit in magnetic disk apparatus having link

A magnetic disk apparatus has a rail support which supports guide rails for guiding a carriage on which heads are mounted. The rail support is positioned outside a magnet of a voice coil motor and mounted on a frame. The guide rails are disposed so as to extend across a cavity in the rail support and have their opposite end portions attached to the rail support. The guide rails do not vibrate even if the voice coil motor receives a reaction during head seeking, whereby the head positioning accuracy can be improved and the storage capacity can be increased. The rigidity of the guide rails is increased by supporting the opposite ends of the guide rails. This structure and a coaxial arrangement of a motor coil allow the overall length of the carriage and, hence, the overall size of the apparatus to be reduced.

Magnetic disk apparatus having improved support for head assembly

A magnetic disk storage system in which magnetic disk drives can be cooled effectively, and even if a blast device for one of he magnetic disk drives fall into trouble or cease operation, a temperature rise of this magnetic disk drive can be suppressed to the minimum. For this purpose, in the magnetic disk storage system containing a plurality of magnetic disk drives, blase devices ae provided for each of the disk drives, and the disk drives are separated by partitions in which openings are formed so that the cooling air can be passed between adjacent magnetic disk drives. With this structure, even if a blast device for a certain magnetic disk drive is out of order or stopped, a part of the cooling air from a blase device for the adjacent disk drives flows into the magnetic disk drive in question through the openings formed in the partitions, and consequently, the temperature rise of the magnetic disk drive whose blase device ceases operation can be suppressed to the minimum, to thereby enhance the reliability of the magnetic disk storage system.

Magnetic disk storage system

A solvent-free, cold-setting ternary organosiloxane composition is disclosed, which contains (A) liquid organopolysiloxane, (B) a cross-linking agent, and (C) a curing catalyst, said organopolysiloxane (A) being constituted by organosilicon group of X--Si (wherein X represents a hydrogen atom or a monovalent hydrocarbyl group) and functional side chain of OR (wherein R represents a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group or an acyl group), said cross-linking agent (B) being one or more organometallic compounds selected from the group consisting of an organoaluminum compound, an organoboron compound, an organosilicon compound, an organotitanium compound and an organozirconium compound having at least one functional group selected from among an alkoxy group, an acyloxy group and an oxime group, and said curing catalyst (C) being a metal-containing organic compound, with the total contents of the metal elements of the ternary composition being 40% by weight or more in terms of MO.sub.y/2 (wherein M represents aluminum, boron, silicon, titanium or zirconium, and y represents a valency of the metal element). A transparent film, a coating material, a binder and a structure formed by using same are also disclosed.

Solvent-free, cold-setting organosiloxane composition and its use

In a voice coil motor having a voice coil, and a magnetic circuit which generates a magnetic flux traversing the voice coil; the magnetic circuit includes a yoke which is divided so as to form a plurality of magnetic paths traversing the voice coil and which is provided with hollows, and adjustment members which are inserted into the hollows so as to adjust the magnetic fluxes of the magnetic paths independently of one another.

Voice coil motor with discrete flux paths

A centrifugal separator with continuous discharge comprises a rotating bowl having a slurry inlet orifice, a sludge discharge port and a liquid discharge port arranged therein; a screw positioned concentrically inside the rotating bowl and rotating in the same direction as but at a different speed from the rotating bowl; and at least one baffle plate is provided within the pitch of the screw extending in the radial direction, so that it is immersed in the liquid separated and accumulated in the rotating bowl in the main section in which the solid/liquid separation is carried out.

Centrifugal separator with continuous discharge

In a magnetic disc device, it is necessary that a magnetic head be positioned above an object data track at a high speed and with a high accuracy. This positioning operation is carried out by an actuator. In order to carry out a magnetic head-positioning operation at a high speed and with a high accuracy, it is necessary that a driving force generated by a magnetic circuit be applied to the center of gravity of the actuator. The techniques according to the present invention are characerized in that the center of gravity of the actuator and the position to which the driving force is applied are aligned with each other by regulating the distribution or position of the magnetic flux in the magnetic circuit.

Actuator for memory storage device

A linear actuator assembly for linearly the reciprocatingly moving magnetic heads in a magnetic disk storage apparatus. This linear actuator has a carriage for supporting magnetic heads, and a voice coil for moving the carriage. The sectional configurations of the carriage and the voice coil are equalized, thereby enabling the transmission of the driving force from the voice coil to the carriage without any eccentricity. This linear actuator also has a vibration absorbing mechanism for absorbing vibrations caused when the linear actuator operates, and a runaway prevention mechanism for limiting the movable range of the carriage.

Linear actuator assembly for accessing a magnetic memory disc

An apparatus for directly monitoring microorganisms present in a liquid crises a window glass with one face in contact with the liquid. Near the other face is disposed a TV camera having an optical magnifying system for monitoring the microorganisms. A sample cell or a narrow space is formed on said one side of the window glass for direct introduction of a sample of the liquid. The sample is statically held in the cell even though the liquid is in movement. The sample is purged from the cell by feeding a cleaning fluid thereinto or by vibrating or otherside exerting physical movement on the cell, whereafter a new sample is introduced into the cell. Purging of the sample cleans the cell and is prevents it from being smudged with dregs, dirt or the like included in the liquid.

Microorganism monitoring apparatus

A method of removing nitrogen and phosphorus from waste water by using an activated sludge including aerobic bacteria is disclosed. The waste water is fed continuously and gradually into a treatment basin in which the sludge is contained so that a mixed liquor consisting of the waste water and the sludge is formed therein. A cycle consisting of an agitating step and an aerating step is repeated at least two times and each cycle is finished within two hours, with the ratio of the agitating time to the aerating time being between one to one and to one. In the agitating step, the mixed liquor presents an anoxic condition and a succeeding anaerobic condition. Denitrification occurs in the anoxic condition and the aerobic bacteria release phosphorus in the anaerobic condition. During the aerating step, nitrification is caused while the bacteria excessively ingest phosphorus from the mixed liquor.

Activated sludge method

The present invention relates to an air-conditioning and an environmental control device for manufacturing plants of integrated circuits, chemicals and foods, hospitals, etc. where clean air is required. In this environmental control device, controlled air blows out from one side and is absorbed into the other side of the room. The blowing surface and the absorbing surface are divided on the basis of the predetermined module. Ventilating units are formed in a suitable size to conform to the module. Because of the construction, the controlling system of temperature or cleanliness of the air in the environmental control room can be rearranged to an optional one by replacing or changing positions of the ventilating units. Even if a controlling system is rearranged to an optional one, the room should be divided into a supply chamber, a mixing chamber, an environmental control chamber and a return chamber from one side to the opposite side of the room, so that air conditioned can flow as required. Conditioned air enters the supply chamber, and air from the supply chamber and air from the return chamber are mixed in the mixing chamber. The mixed air passes through the ventilating units contained in the mixing chamber to be supplied into the environmental control chamber. The ventilating units have a fan and a high efficiency particulate air (HEPA) filter.

Rearrangeable partial environmental control device

Growing community of inventors

Hiratsuka, Japan

Tomio Suzuki