Hitachi, Ltd.

Hitachi Kiden Kogyo Kabushiki Kaisha

Hitachi Kiden Kogyo, Ltd.

Seiji Watanabe

Hiroyuki Kamiya

Ken Takahashi

Yasuyuki Wachi

Naoyuki Takahashi

Masaya Imai

Takahisa Nitta

Masatosi Taniguchi

Fumitake Aki

Tomokichi Okawara

Tomohisa Kanazawa

Susumu Koizumi

Teiji Horimoto

Ichiro Fukuwatari

Yoshio Saito

A conveyor means for transporting precision parts is divided into a plurality of block units and compressed air is supplied selectively to each block unit where a transporting pallet is present so as to reduce consumption of compressed air to the minimum. Also, it ensures high carrying efficiency because of its slow starting and slow stopping without reducing the speed during running.

Conveyor means

A runway for a conveyor whereby a transporting pallet which straddles the runway is floated in the air by air discharged from the runway and is conveyed by a linear motor provided in the runway. Air ducts to supply air to the upper part of the runway are provided symmetrically. Compressed air discharged upwardly and sideways from nozzle holes at the upper part of the runway floats the transporting pallet which runs above and along the runway by operation of the linear motor. The runway having open spaces for air ducts and an open space for installation of linear motors is made by extrusion from a metallic mold.

Runway for a conveyor means using linear motors

A liquid cooled stator winding of a rotary electric machine comprising a stator bar which is composed of a plurality of hollow conductive elements and disposed within a slot of a stator core, and a liquid coolant header fixedly mounted on one end of the stator bar by heat welding. The stator bar is bent adjacent its end in a direction generally normal with respect to its longitudinal direction so as to serve trouble-free over long years of machine operation.

Liquid cooled stator winding for a rotary electric machine having

A field winding assembly for rotor in electric rotary machine which is to be mounted into a substantially rectangular open slot formed in the rotor and secured by a wedge disposed in the slot closer to its open side, wherein the field winding assembly comprises a conductor section to be mounted into the slot, and an insulator for insulating the conductor section from the slot walls and the wedge and composed of a lower U-shaped insulating member covering the sides of the conductor section adjacent to bottom and side walls of the slot and an upper U-shaped insulating member formed to cooperate with the lower U-shaped insulating member for completely surrounding the conductor section and to have a base side adjacent to the wedge when assembled in the slot. The upper U-shaped insulating portion which is flexible for lateral contraction and expansion of the upper insulating member whereby the stress imported to the upper U-shaped insulating member is absorbed by the flexible characteristic of that portion.

Field winding assembly for rotor in electric rotary machine

A mechanical seal comprises, in addition to a rotating seal element, a stationary seal element, and a support ring: means for securing the support ring to a rotating shaft in such a manner that, between a casing and the shaft, the ring remains nonrotatable by the shaft but can travel axially following any axial movement of the shaft. The securing means comprises nonrotational stop means located between the casing and support ring and means located between the ring and shaft to permit the both to rotate relative to each other but keep them from moving axially. The nonrotational stop means is a combination of pins and holes, key ways and keys, or the like, and the means located between the ring and shaft to permit the both to rotate is either a pair of rolling bearings or a plurality of journal bearings plus a thrust sliding bearing.

Mechanical seal

A method and apparatus for connecting together leads of a rotor of a water-cooled turbogenerator wherein a cooling medium sealing pipe is used for connecting or joining each hollow axial lead to each hollow radial lead in a revolving magnetic field. The pipe is connected at one end to the hollow axial lead and at the other end to the hollow radial lead, whereby the two leads can be readily connected together while ensuring sealing of the cooling medium in the pipe.

Method and apparatus for connecting leads of a rotor

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Hitachi, Japan

Seiji Watanabe