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1. 发明专利

JPH01190234A NON-CONTACT TYPE FIELD GROUND FAULT DETECTION DEVICE 失效
公开(公告)号：JPH01190234A
公开(公告)日：1989-07-31
申请号：JP1254288
申请日：1988-01-25
申请人： HITACHI LTD , HITACHI SERVICE ENG
发明人： YOSHIDA SATOMI , HIRATA FUMIHIKO
IPC分类号： H02K11/00 , H02K19/36
摘要： PURPOSE:To simplify a construction and to improve a ground fault detection performance by loading a power and signal rotary transformer into a brushless synchronous machine and supplying AC power from a primary side fixing section of the power rotary transformer. CONSTITUTION:When a ground fault comes to a field circuit 2a of a synchronous machine, a power rotary transformer 6 is the power supply, and the ground fault current flows through limiting resistance 8 and a primary side rotating section of a signal rotary transformer 4. Accordingly, a voltage signal generates in a secondary side fixing section of the signal rotary transformer 4. The ground fault of the field circuit can be detected with non-contact by a ground fault detector 5 discriminating a level thereof. The field circuit and a detection device in the case of a ground fault can be protected by the limiting resistance 8.

2. 发明专利

JPS6477444A GENERATOR COOLING DEVICE 失效
公开(公告)号：JPS6477444A
公开(公告)日：1989-03-23
申请号：JP23223287
申请日：1987-09-18
申请人： HITACHI LTD , HITACHI SERVICE ENG
发明人： TERANISHI NORIYOSHI , MEGURO KAZUTOSHI , KUROSAWA MASARU , TAKEDA TAIJI , NAKAJIMA YUTAKA
IPC分类号： H02K9/24 , H02K9/18
摘要： PURPOSE:To allow a generator to perform overload operation, by controlling it so that the refrigerant temperature on low temperature side may be constant when the load of a generator is lower than the rating and the refrigerant temperature on high temperature side may be so when the load is higher than the rating. CONSTITUTION:The hydrogen to cool a rotor of a generator is cooled with cooling water by a hydrogen cooler 4. Ecach temperature of hydrogen at the inlet (on the high temperature side) and at the outlet (on the low temperature side) of the hydrogen cooler 4 is controlled to be constant with heat regulators 22 and 23 respectively. The temperature of cooling water to cool a stator 12 of the generator is controlled with heat regulators 25 and 26 likewise. When the load of the generator is lower than the rating, the temperature on the low temperature side is kept constant, because the signal selectors 24 and 27 will select the signals from heat regulators 23 and 26. When the generator is overloaded, the temperature on the high temperature side is kept constant, because the signal selectors 24 and 27 will select the signals from heat regulators 22 and 25.

3. 发明专利

JPS6432634A PLASMA TREATER 失效
公开(公告)号：JPS6432634A
公开(公告)日：1989-02-02
申请号：JP18755487
申请日：1987-07-29
申请人： HITACHI LTD , HITACHI SERVICE ENG
发明人： SUZUKI KAZUO , SONOBE TADASHI
IPC分类号： H01L21/205 , H01L21/302 , H01L21/3065 , H01L21/31
摘要： PURPOSE:To obtain low-cost discharge plasma, and to treat the surface with excellent reproducibility by installing a superconducting magnetic field coil giving a constant magnetic field into space near a sample base and a sample outside a sample chamber. CONSTITUTION:A superconducting magnetic field coil 21 giving a constant magnetic field into space near a sample base 8 and a sample 7 is mounted outside a sample chamber 9. The magnetic field near the sample base 8 and the sample 7 near the inside of the coil 23 maintains the intensity of the magnetic field by the coil 21 applied first because the coil 21 cancels the effect section of a normal conducting magnetic field coil 1. Consequently, even when the kinds of a gas 6 for plasma, a material gas 10, etc., are changed, the intensity of the magnetic field near the sample 7 is kept constant at all times even when currents by the coil 1 are altered for stabilizing the state of discharge. Accordingly, low-cost discharge plasma is acquired, and the surface is treated with excellent reproducibility.

4. 发明专利

JPS6425376A STORING CARD CASE 失效
公开(公告)号：JPS6425376A
公开(公告)日：1989-01-27
申请号：JP18101887
申请日：1987-07-22
申请人： HITACHI LTD , HITACHI SERVICE ENG
发明人： SUZUKI ITARU , SUZUKI KAZUO
IPC分类号： G11B23/02
摘要： PURPOSE:To prevent the change of a magnetic storage condition due to an external magnetic field by storing and holding a magnetic card in an exclusive- use case made of a high-temperature superconductive material. CONSTITUTION:When a magnetic storing card is a floppy disc 21, the floppy disc 21 to transmit and receive information is stored in an exclusive-use case 11 made of the high-temperature superconductive material. However, a driving part 41 and a storing function operating part 51 at the time of using the floppy disc 21 may emerge to the outside according to a necessity. Consequently, an external magnetic field 3 is shielded from the floppy disc by a Meissner effect. Thus, the storage condition of the floppy disc 21 can be stably maintained without being influenced by the external magnetic field 3.

5. 发明专利

JPS63319008A OIL-WATER SEPARATION DEVICE 失效
公开(公告)号：JPS63319008A
公开(公告)日：1988-12-27
申请号：JP15439387
申请日：1987-06-23
申请人： HITACHI SERVICE ENG
发明人： KUROOKA SEIJI , TASHIRO SUEKICHI , SUZUKI AKIHIRO
IPC分类号： B01D17/06 , B01D17/00 , B01D17/04
摘要： PURPOSE:To efficiently enlarge oil particles and to aggregate to carry out oil-water separation by circulating raw water between a circulating treatment vessel provided with cation supply electrodes in the bottom part without using any outside electric power source and an oil sucking vessel provided with adsorbing aggregation material. CONSTITUTION:Raw water is sent from raw water inlet 1 to a raw water tank 2 in which metallic cations eluted from the cation supply electrodes 3 consisting of different kinds of metallic plates enlarge oil drops in the raw water to promote the aggregation. Then, the raw water is sent through a siphon 4 into the circulating treatment vessel 5 in which the oil drops are again enlarged by metallic cations supplied from the cation supply electrodes 3a. And then, the raw water is sent to the oil sucking vessel 9 by a circulating pump 7 and the oil drops are collected by the oil adsorbing aggregation material 13 while ascending in the oil adsorbing aggregation material 13, and the raw water are returned over a weir 11 into the circulation treatment vessel 5 to be circulated. The collected oil drops are automatically moved through an oil sucking-out unit 17 to an oil reservoir 18.

6. 发明专利

JPS63298023A PRESSURE TESTING METHOD FOR PRESSURE CONTAINER 失效
公开(公告)号：JPS63298023A
公开(公告)日：1988-12-05
申请号：JP13141587
申请日：1987-05-29
申请人： HITACHI LTD , HITACHI SERVICE ENG
发明人： ISHIHARA MITSURU , IIZUKA NOBUYUKI , WATANABE KATSUYOSHI , HORIE TORU
IPC分类号： G01N3/12
摘要： PURPOSE:To remarkably reduce the consumption of water at the time of a pressure test and to greatly reduce the man-hours for operation by charging a water amount exclusion member which substitutes for the volume of a part of injection water and has smaller specific gravity than water in a pressure container. CONSTITUTION:Plural spherical bodies 23 for gas charging are formed in the pressure container while linked with one another by communicating pipes 25, which are connected to a gas cylinder 7. When the pressure test is taken, the water amount exclusion member 2 is charged in the pressure container 1 and then the communicating pipes 25 and sealed from the pressure container 1 with water and connected to the gas cylinder 7 through a gas pressure origin valve 9, which is opened until the bodies 23 for gas charging swell as specified to apply pressure with the gas of the gas cylinder 7. In this case, the water amount exclusion member 2 has no variation in volume because of pressure proof structure, and water for hydraulic pressure can be reduce greatly to reduce and shorten the operation man-hours and time for water filling and water discharging and also facilitate the operation, thereby reducing the cost.

7. 发明专利

JPS63247196A HYBRID TYPE MAGNETICALLY PROPELLED SHIP 失效
公开(公告)号：JPS63247196A
公开(公告)日：1988-10-13
申请号：JP8094587
申请日：1987-04-03
申请人： HITACHI LTD , HITACHI SERVICE ENG
发明人： KUROISHI KAZUO , IMURA HIROYA
IPC分类号： B63H19/00
摘要： PURPOSE:To reduce a leakage magnetic field and improve propelling efficiency by providing both external magnetic field type electromagnetic propelling device and an internal magnetic field type electromagnetic propelling device on one ship and separately and independently operating each of them. CONSTITUTION:An external magnetic field type electromagnetic propelling device and an internal magnetic field type electromagnetic propelling device are installed in a hybrid type magnetically propelled ship. The external magnetic field type electromagnetic propelling device consists of a racetrack type superconductive magnet 12 having linear parts in the longitudinal direction of ship and electrodes 13, and the internal magnetic field type electromagnetic propelling device consists of a saddle type superconductive magnet 22 and electrodes 23. Thereby, during navigation on the open sea, the superconductive magnet 12 is excited to make a sea water electric current flow in the electrodes 13, enabling effective operation as an external magnetic field type magnetically propelled ship. Also, at the time of sailing in a harbor, the saddle type magnet 22 is excited to carry out navigation as an internal magnetic field type magnetically propelled ship, removing a leakage magnetic field.

8. 发明专利

JPS63213344A PLASMA PROCESSING DEVICE 失效
公开(公告)号：JPS63213344A
公开(公告)日：1988-09-06
申请号：JP4525987
申请日：1987-03-02
申请人： HITACHI LTD , HITACHI SERVICE ENG
发明人： SUZUKI KAZUO , SUZUKI NOBORU , SONOBE TADASHI , CHIBA ATSUSHI , MONMA NAOHIRO , MOCHIZUKI YASUHIRO , TAKAHASHI SHIGERU , FUKUDA TAKUYA
IPC分类号： H01L21/302 , H01L21/205 , H01L21/3065 , H05H1/46
摘要： PURPOSE:To enable transportation of high density plasma to a surface of a sample and to improve film quality and to perform plasma processing with speed, by making a distribution of magnetic flux density be shaped to decrease monotonously in the direction of a sample board to a discharge tube and defining a position of electron cyclotron resonant magnetic field generation inside a sample room. CONSTITUTION:Magnetic flux density on a microwave 4 incident end of a discharge tube 2 is made larger than that on an electron cyclotron resonant position so that its distribution of magnetic flux density is shaped to decrease monotonously from a discharge tube 2 to a sample board 8. A magnetic field position is installed in the sample room 9 so as to generate microwaves 4 and electron cyclotron resonance. Therefore, a region where high density plasma is generated in the region of high magnetic flux density rather than resonant magnetic flux density can be extended to the sample room, and a distance at which plasma is extruded by a magnetic field gradient and transported to the sample board 8, can be made small. Hence, high density plasma can be transported to the surface of the sample 7.

9. 发明专利

JPS63198896A CHANNEL-BOX ERECTING DEVICE 失效
公开(公告)号：JPS63198896A
公开(公告)日：1988-08-17
申请号：JP2961587
申请日：1987-02-13
申请人： HITACHI LTD , HITACHI SERVICE ENG , HITACHI BUTSURYU KK
发明人： SHINPO KATSUTOSHI , ISHIKAWA RYOICHI , OISHI ICHIRO
IPC分类号： G21C19/00 , G21C19/10

10. 发明专利

JPS63198892A JACK FOR FITTING TO CHANNEL BOX AND USAGE THEREOF 失效
公开(公告)号：JPS63198892A
公开(公告)日：1988-08-17
申请号：JP2961687
申请日：1987-02-13
申请人： HITACHI LTD , HITACHI SERVICE ENG , HITACHI BUTSURYU KK
发明人： SHINPO KATSUTOSHI , ISHIKAWA RYOICHI , OISHI ICHIRO
IPC分类号： G21C3/30 , G21C3/324 , G21C21/00

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