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11. 发明专利

JPS55109338A CHANGEOVER SOLENOID SWITCH 失效
公开(公告)号：JPS55109338A
公开(公告)日：1980-08-22
申请号：JP1044679
申请日：1979-02-02
申请人： HITACHI LTD
发明人： OZAKA AKIRA , YODA MIKIO , KITAGAWA MIKIO
IPC分类号： H01H51/12 , H01H50/64 , H01H51/20 , H02J9/04

12. 发明专利

JPS5449767A NOISE PREVENTIVE APPARATUS FOR PIPES IN TRANSIT 失效
公开(公告)号：JPS5449767A
公开(公告)日：1979-04-19
申请号：JP11556477
申请日：1977-09-28
申请人： HITACHI LTD
发明人： SATOU KATSUTOSHI , ITOU SUSUMU , KANETANI TADASHI , OONISHI HIROAKI , ICHIISHI TSUNEO , OZAKA AKIRA
IPC分类号： B65G11/20 , B65G43/00
摘要： PURPOSE:To reduce noise generated from clashing of steel pipes with each other by improving magnetic efficiency with a magnetic closed circuit formed through the steel pipes employing three lines of magnetic rail. CONSTITUTION:When an exciting coil 27 is excited positively, a skid rail 21 is turned to the N pole and the skid rails 22a and 22b to the S pole, whereby a magnetic closed loop is formed to brake a steel pipe 10. When the coil is excited inversely, by contrast, the skid rail 21 is turned to the S pole and the skid rails 22a and 22b to the N pole. Thus, an opposite closed loop is formed, thereby permiting the steel pipes to turn freely. In this manner, the steel pipes 10 are transferred on the skid rails being subjected to repetition of braking and free rotation. The magnet is a sort of shell construction, thereby reducing leakage of magnetic flux and hence, the magnetic efficiency can be improved.

13. 发明专利

JPH08237829A ELECTRIC CIRCUIT SWITCHGEAR 失效
公开(公告)号：JPH08237829A
公开(公告)日：1996-09-13
申请号：JP3647895
申请日：1995-02-24
申请人： HITACHI LTD , HITACHI ELECTRIC SYSTEMS
发明人： ISHIDA SHINNOSUKE , OZAKA AKIRA
IPC分类号： H02B13/075
摘要： PURPOSE: To provide an electric circuit switchgear which can be arc-extinguished surely by a method wherein the opening speed immediately after the contact parting operation of a moving contact in the contact parting operation is made maximum by a compression spring attached to a moving contact interlocked with an electric motor and a compressed insulating gas is blown simultaneously to the contact. CONSTITUTION: In an electric motor 1, a shaft 4 is turned via a gear inside a gear box 2, and a turning motion is converted into a linear motion by a ball screw 5. A moving contact 10 is moved up and down so as to be closed and opened. A collector 11 which is slid with the moving contact 10 is fixed to a ground-side external terminal 12. An insulating tube 13 is provided, on one side, with a moving contact 14 which insulates a generator-side contact 18 from the ground-side contact 12 and which is interlocked with the moving contact 10, with a fixed-side arc contact 15, with a support stand 16 comprising a wiper spring 20 and with a fixed main contact 17. When the contacts 14, 15, 17 are opened, their opening speed immediately after their contact parting operation is made maximum, and an insulating gas is spouted simultaneously. Thereby, an electric circuit switchgear can be arc-extinguished surely.

14. 发明专利

JPH06275176A VACUUM VALVE AND ITS MANUFACTURE 失效
公开(公告)号：JPH06275176A
公开(公告)日：1994-09-30
申请号：JP6058293
申请日：1993-03-19
申请人： HITACHI LTD
发明人： TANIMIZU TORU , OZAKA AKIRA , HAKAMATA YOSHIMI , KOGUCHI YOSHIO
IPC分类号： H01H33/66 , H01H33/662
摘要： PURPOSE:To provide a vacuum valve having a small size as the whole form which is stably usable in a vacuum circuit breaker having a large breaking capacity. CONSTITUTION:Relatively movable electrodes 1, 3 and an electric filed shield 5 are enclosed by a glass insulating cylinder 10 formed by mutually connecting two cylinder bodies 11, 12 in their opening end parts. In each cylinder body, the connected opened end part is formed of a major diameter part, and the opposite side end part of a minor diameter part. Walls 11C, 12C are formed in such a manner that they never exceed the major diameter part.

15. 发明专利

JPS63257148A VACUUM TYPE ELECTROMAGNETIC CONTACTOR 失效
公开(公告)号：JPS63257148A
公开(公告)日：1988-10-25
申请号：JP8884187
申请日：1987-04-13
申请人： HITACHI LTD
发明人： AOSHIMA MASARU , OZAKA AKIRA
IPC分类号： H01H33/66

16. 发明专利

JPS6226524B2 失效
公开(公告)号：JPS6226524B2
公开(公告)日：1987-06-09
申请号：JP7655178
申请日：1978-06-26
申请人： HITACHI LTD
发明人： OZAKA AKIRA , YODA MIKIO
IPC分类号： H01H9/46 , H01H9/34 , H01H33/08

17. 发明专利

JPS58103736A ELECTROMAGNETIC CONTACTOR 失效
公开(公告)号：JPS58103736A
公开(公告)日：1983-06-20
申请号：JP20166981
申请日：1981-12-16
申请人： HITACHI LTD
发明人： OZAKA AKIRA , YODA MIKIO
IPC分类号： H01H50/08 , H01H50/38

18. 发明专利

JPS5895896A COOLER FOR ELECTRONIC PART 失效
公开(公告)号：JPS5895896A
公开(公告)日：1983-06-07
申请号：JP19288681
申请日：1981-12-02
申请人： HITACHI LTD
发明人： YODA MIKIO , SHIBATA EKIZOU , OZAKA AKIRA
IPC分类号： H05K7/20

19. 发明专利

JPS5872822A COOLING STRUCTURE FOR GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPS5872822A
公开(公告)日：1983-04-30
申请号：JP17006381
申请日：1981-10-26
申请人： HITACHI LTD
发明人： OZAKA AKIRA
IPC分类号： F23R3/06 , F23R3/00
摘要： PURPOSE:To improve cooling performance, by so constituting that inflow air between a casing and an external wall is led from an air opening of the external wall to an internal wall and a part of the air is led to a linear from an exhaust hole of an impinging part, in joint cooling of impingement cooling with film cooling. CONSTITUTION:Air flowed in a gap between a casing not illustrated in a sketch and an external wall 15 of a combustor from a compressor is spouted 12 from an air hole 8 for cooling toward an inner wall 16 and is run against the inner wall 16. The air is expanded radially centering around this colliding point and a part of the air is exhausted 18 within a liner from an exhaust hole 17 of the center part of the colliding part. With this, as for a jet flow 11 a flow between colliding parts is improved and thermal transfer rate is improved. The inside of the inner wall 16 is cooled from open ends of a turbine side of the external wall 15 and the inner wall 16 by a filmlike exhaust flow 13 of cooling air which has completed impingement cooling. With this constitution, cooling performance can be improved.

20. 发明专利

JPS57118330A Auxiliary contactor for electromagnetic contactor 失效
标题翻译：电磁接触器辅助接触器
公开(公告)号：JPS57118330A
公开(公告)日：1982-07-23
申请号：JP317181
申请日：1981-01-14
申请人： Hitachi Ltd
发明人： NAKAZAWA AKIO , OZAKA AKIRA
IPC分类号： H01H50/16 , H01H50/54

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