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1. 发明专利

JPH06260077A SWITCH WITH FUSE 失效
公开(公告)号：JPH06260077A
公开(公告)日：1994-09-16
申请号：JP4624893
申请日：1993-03-08
申请人： HITACHI LTD , HITACHI ELECTRIC SYSTEMS
发明人： SHIGESA NORIO , TANIMIZU TORU , IZUMI SADAO , HIRANO MASAKATSU , OZAKA AKIRA , TAKEMATSU KOTARO
IPC分类号： H01H9/10 , H01H21/16 , H01H33/02 , H01H33/42 , H01H85/00 , H01H85/042 , H01H85/22 , H01H85/50
摘要： PURPOSE:To provide planar miniaturized switches with fuses by providing insulating barriers between power side fixed contacts and power side clips, and arranging load switches and fuses on the right and left of the insulating barriers. CONSTITUTION:Insulating support plates 1 are provided with power side clips 13 and load side clips 14 fitting or removing fuses 6 and moving blades 8 contacted with or separated from power side fixed contacts with the rotary shafts connected to the power side clips 13 adjacent to the clips used as fulcrums. Intermediate connection sections 13A, 13B are connected to the power side clips 13 between the power side clips 13 and the load side clips 14 from the rotary shafts of the moving blades 8. Insulating barriers 3 are provided between the power side fixed contacts and the power side clips 13, and load switched 5 and fuses 6 are arranged on the right and left of the insulating barriers 3. Switches with fuses easy to fit can be obtained.

2. 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.

3. 发明专利

JPH06267378A VACUUM CIRCUIT BREAKER, ELECTRODE THEREFOR, AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH06267378A
公开(公告)日：1994-09-22
申请号：JP5077693
申请日：1993-03-11
申请人： HITACHI LTD
发明人： HAKAMATA YOSHIMI , TANIMIZU TORU , OZAKA AKIRA , KOMURO KATSUHIRO
IPC分类号： H01H33/66 , H01H1/02 , H01H33/664
摘要： PURPOSE:To provide economical, low-electrical-resistance, miniaturized electrodes for use in a vacuum circuit breaker, a method of manufacture thereof, and a vacuum circuit breaker having such electrodes. CONSTITUTION:Part of a high-conductivity metallic member is infiltrated into the pores of a porous high-melting-point metallic member and both of the metallic members are integrally joined together and an arc electrode portion 13 is formed from a high-melting-point metal area 11 where the high-conductivity metal is infiltrated into the pores of the high-melting-point metallic member. A high-conductivity metal area 12 made solely from the high-conductivity metal is hollowed and slits 15-17 are put therein to form a coil electrode portion 14. A rod 18 is hard brazed to the back side of the coil electrode portion 14 so as to reduce the number of part items, and also a brazing portion between the arc electrode portion 13 and the coil electrode portion 14 is omitted to reduce electrical resistance so as to reduce the amount of heat generated when power is supplied.

4. 发明专利

JPS6395352A ELECTROMAGNETIC ULTRASONIC WAVE MEASURING APPARATUS 失效
公开(公告)号：JPS6395352A
公开(公告)日：1988-04-26
申请号：JP24131886
申请日：1986-10-13
申请人： HITACHI LTD
发明人： KADOWAKI TAKASHI , ITO SUSUMU , OZAKA AKIRA , FUJITA YASUNOBU
IPC分类号： G01B17/02 , G01N29/04
摘要： PURPOSE:To enable easy and accurate inspector of a defect or the like of material, by providing a circuit to perform a subtraction of a detection signal of an ultrasonic transmitting/receiving coil and a detection signal of a compensation coil. CONSTITUTION:When excited with a DC power source 3, a DC coil 22 generates a DC magnetic flux 4. The magnetic flux 4 is composed mostly of a component 41 vertical to the surface of material 1 to be inspected below the center leg end of a core 21 while containing a parallel component 42. On the other hand, when a pulse current is applied to a transmitting coil 23 from a pulse generator 5, an eddy current 6 is generated on the surface of the material 1. A transverse ultrasonic wave is generated from the eddy current 6 and the component 41 of the magnetic flux 4 or a longitudinal ultrasonic wave is generated from the component 42. The ultrasonic waves reflected from an internal defect of the material 1 are received with a receiving coil 24, mostly as transverse ultrasonic waves and a slightly as longitudinal ultrasonic waves. On the other hand, below the center leg side of the core 21 with a compensation coil 25 set thereon, the magnetic flux 4 mostly consists of a component 43 parallel with the surface of the material 1 and mainly, a longitudinal component is received. The received waves of the coils 24 and 25 are subtracted 7 and a transverse wave component alone of the received wave of the coil 24 is displayed 8 to detect a defect.

5. 发明专利

JPS6037008B2 失效
公开(公告)号：JPS6037008B2
公开(公告)日：1985-08-23
申请号：JP11556477
申请日：1977-09-28
申请人： HITACHI LTD
发明人： SATO KATSUTOSHI , ITO SUSUMU , KANETANI TADASHI , OONISHI HIROAKI , ICHIISHI TSUNEO , OZAKA AKIRA
IPC分类号： B65G11/20 , B65G43/00

6. 发明专利

JPS58101447A COOLER FOR ELECTRONIC PART 失效
公开(公告)号：JPS58101447A
公开(公告)日：1983-06-16
申请号：JP19864581
申请日：1981-12-11
申请人： HITACHI LTD
发明人： YODA MIKIO , SHIBATA EKIZOU , OZAKA AKIRA , SHINOHARA YASUSHI
IPC分类号： H01L23/36 , H05K7/20
摘要： PURPOSE:To effectively cool an electronic part by bonding a gel-like heat transfer medium between a heat sink plate and a printed board and forming a gap which surrounds the periphery of the specific electronic part on the board between the medium which faces the part and the plate. CONSTITUTION:Si gels (heat transfer media) 6a, 6b are formed at both sides of a printed board 1, on which electronic parts 2 are mounted, and heat sink plates 3a, 3b are clamped with screws 8. Slits 11 are formed around the electronic parts between the gel 6a which is contacted with the specific electronic part 2 and the plate 3a. The slits 11 prevent the transfer of heat from other to the parts which less heat ad are weak for the heat. Further, an escaping groove 7 at the clamping and deforming time is formed at the gel 6b bonded to the plate 3b, and a front panel 9 is coupled integrally with the board 1. The printed board unit is cooled by air with a plurality of air gaps formed in parallel. According to this structure, even if a large local heating part exists, the temperature distribution is uniformly performed, effective cooling can be performed while protecting the part which is weak for the heat.

7. 发明专利

JPS5814424A CIRCUIT FOR OPERATING ELECTROMAGNETIC CONTACTOR 失效
公开(公告)号：JPS5814424A
公开(公告)日：1983-01-27
申请号：JP11219281
申请日：1981-07-20
申请人： HITACHI LTD
发明人： CHIBA MASASHI , SHINOHARA YASUSHI , OZAKA AKIRA
IPC分类号： H01H9/54

8. 发明专利

JPS57118439A Short circuit protecting circuit of transistor 失效
标题翻译：短路电路保护电路
公开(公告)号：JPS57118439A
公开(公告)日：1982-07-23
申请号：JP318781
申请日：1981-01-14
申请人： Hitachi Ltd
发明人： OZAKA AKIRA , ICHIISHI TSUNEO , YODA MIKIO , SHINOHARA YASUSHI , ISHIYAMA FUMIO
IPC分类号： H03K17/08 , H03K17/082 , H03K17/64
CPC分类号： H03K17/0826
摘要： PURPOSE:To realize a short circuit preventing circuit of a transistor which prevent the transistor from the breakdown due to a short circuit, by connecting a resistor for detection of current in series to a load and turning on a protecting transistor with the voltage at the both ends of the resistor. CONSTITUTION:When a short circuit occures across a load 1, the current flowing through a resistance 14 increases. When this current exceeds the Zener voltage of a Zener diode 17, the base current flows to a transistor (TR)15. As a result, a large current is poured to the base of a TR5 through a resistance 18. This increases the collector current of a TR4. At the same time, the base current increases more than the short circuit current. As a result, the TR4 keeps the saturated state even after the occurrence of a short circuit to reduce the loss caused within the TR4. Meanswhile a fuse 13 is fused to prevent the breakdown of the TR4.
摘要翻译：目的：为了实现防止晶体管由于短路导致的击穿的晶体管的短路防止电路，通过将用于电流检测的电阻器连接到负载并以两端的电压来接通保护晶体管，电阻端。构成：当穿过负载1发生短路时，流过电阻14的电流增加。当该电流超过齐纳二极管17的齐纳电压时，基极电流流向晶体管（TR）15。结果，通过电阻18将大电流注入TR5的基极。这增加了TR4的集电极电流。同时，基极电流大于短路电流。结果，即使发生短路，TR4也保持饱和状态，以减少在TR4内引起的损耗。同时，熔断器13被熔断以防止TR4的击穿。

9. 发明专利

JPS56156631A ARC SHOOT 失效
公开(公告)号：JPS56156631A
公开(公告)日：1981-12-03
申请号：JP5786880
申请日：1980-05-02
申请人： HITACHI LTD
发明人： YODA MIKIO , OZAKA AKIRA , OKITA MITSUO
IPC分类号： H01H33/08 , H01H73/18

10. 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

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