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公开(公告)号：KR820001399Y1
公开(公告)日：1982-07-03
申请号：KR820003513
申请日：1982-05-04
Applicant: HITACHI LTD
Inventor： KASIMURA S , TSUKUSI M , SASAKI K , HIRASAWA K , YOSIOKA Y , SATO M
IPC: H01H33/70
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公开(公告)号：US3817906A
公开(公告)日：1974-06-18
申请号：US22397372
申请日：1972-02-07
Applicant: HITACHI LTD
Inventor： HONDO K , TSUKIOKA H , SATO M
CPC classification number: C08K3/16
Abstract: AN EPOXY RESIN COMPOSITION FOR USE AS A COATING TO PROTECT INSULATING MATERIALS AGAINST STRONGLY CORROSIVE GASEOUS DECOMPOSITION PRODUCTS CONTAINING FLUORINE COMPOUNDS, WHICH COMPRISES AN EPOXY RESIN BASED ON GLYCIDYL ETHER OF BISPHENOL A ADMIXED WITH A BORON TRIFLUORIDEAMINE COMPLEX AS THE HARDENER, ALUMINA AND MAGNESIUM FLUORIDE, BOTH HAVING A PARTICLE DIAMETER OF 100$ OR LESS, AS THE FILLER, AND A THIXOTROPIC AGENT. THE COMPOSITION IS SEMI-CURABLE AT ROOM TEMPERATURE, AND ON COMPLETE CURING AT HIGH TEMPERATURES, IT BECOMES A COATING COMPOSITION EXCELLENT IN ELECTRIC INSULATION. ACCORDING TO THE PURPOSE OF APPLICATION, THE COMPOSITION CAN ALSO BE ADMIXED WITH A SOLVENT FOR THE EPOXY RESIN TO BE APPLICABLE BY SPRAY COATING.
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Patent Agency Ranking
公开(公告)号：US3846711A
公开(公告)日：1974-11-05
申请号：US38641573
申请日：1973-08-07
Applicant: HITACHI LTD
Inventor： TAKAHASHI K , SATO M , OHTA K , TAKAMIYA T
IPC: H03G3/30
CPC classification number: H03G3/3015
Abstract: An automatic gain control circuit which includes an amplifier portion for amplifying the automatic gain control signal, an impedance control portion driven by the output of the amplifier portion, a variable impedance portion provided separately from the amplifier portion and controlled by the impedance control portion, and an AC bypass portion arranged on the input side of the impedance control portion, whereby even when the control signal is at a low level, the gain control can be effected at a low distortion factor.
Abstract translation: 一种自动增益控制电路，包括用于放大自动增益控制信号的放大器部分，由放大器部分的输出驱动的阻抗控制部分，与放大器部分分开设置并由阻抗控制部分控制的可变阻抗部分，以及 设置在阻抗控制部的输入侧的交流旁路部，由此即使控制信号为低电平，也可以以低失真因子进行增益控制。
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公开(公告)号：US3831267A
公开(公告)日：1974-08-27
申请号：US33991873
申请日：1973-03-09
Applicant: HITACHI LTD
Inventor： ONISHI K , YAMASHITA S , SATO M
CPC classification number: H02K3/00 , H02K15/12 , Y10T29/49012 , Y10T29/49071
Abstract: A sleeve armature and a method of manufacturing the same in which a number of component coils composing the winding are uniformly mounted flatly and in a partly superimposed manner on the circumference of an inner mold, and after the coils are impregnated with a thermosetting resin, the coils mounted on the inner mold are enclosed with a thermocontracting coating, and then the structure is heated. The thermocontracting coating contracts and applies a uniform pressing force to the coils and the thermosetting resin, and at the same time the thermosetting resin is set.
Abstract translation: 套筒电枢及其制造方法，其中构成绕组的多个部件线圈均匀地平坦地安装在内模的圆周上，并且在线圈被热固性树脂浸渍之后， 安装在内模上的线圈用热收缩涂层包围，然后将结构加热。 热收缩涂层收缩并对线圈和热固性树脂施加均匀的压力，并且同时固化热固性树脂。
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公开(公告)号：US3839613A
公开(公告)日：1974-10-01
申请号：US36614473
申请日：1973-06-01
Applicant: HITACHI LTD
IPC: H01H33/91 , H01H33/915 , H01H33/70
CPC classification number: H01H33/91
Abstract: A puffer type circuit breaker comprises a contactor device including at least one set of a fixed contactor and a hollow movable contactor provided in a pressure container in which an arc-extinguishing gas of unitary pressure is filed, the contactors being separable relatively from each other, a puffer device for compressing the arc-extinguishing gas in conjunction with a breaking operation, an insulating nozzle formed with an orifice portion surrounding the outer diameter portions of the fixed contactor for driving the arc-extinguishing gas compressed to a high pressure by the puffer device at an arc produced between the contactors, and valve mechanisms provided on the side of the fixed contact and on the side of the movable contactor, respectively, the mechanisms blocking the arc-extinguishing gas until the movable contactor is separated a predetermined distance away from the fixed contactor and thereafter being substantially simultaneously opened. This allows the arc-extinguishing gas to be compressed at pressure permitting the breaking operation and to be blown against the arc in a state where the contactors are separated by a distance permitting the breaking operation with the result of the breaking of a large current.
Abstract translation: 吹气式断路器包括接触器装置，该接触器装置包括设置在压力容器中的至少一组固定接触器和中空活动接触器，在所述压力容器中存在一体压力的灭弧气体，所述接触器彼此相对分离， 用于与断开操作一起压缩灭弧气体的吹气装置，形成有围绕固定接触器的外径部分的孔口部分的绝缘喷嘴，用于驱动被吹气装置压缩成高压的灭弧气体 在接触器之间产生的电弧和分别设置在固定触点侧和可动接触器一侧的阀机构之间，阻塞灭弧气体的机构直到活动接触器离开 固定接触器，然后基本上同时打开。 这允许灭弧气体在允许断裂操作的压力下被压缩并且在接触器被分开一段允许断开操作的距离的状态下被吹过电弧，结果是断开大电流。
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公开(公告)号：SE408108B
公开(公告)日：1979-05-14
申请号：SE7610464
申请日：1976-09-21
Applicant: HITACHI LTD
Inventor： SATO M , TAKAHASHI I , KURASAWA T , YOSHIOKA Y , NAKAGAWA Y
IPC: H01H33/24 , H01H33/91 , H01H33/915
Abstract: A puffer type gas circuit breaker comprises a first and a second arcing electrodes movable relative to each other, an insulating nozzle surrounding the second arcing electrode, a puffer device for introducing an arc-suppressing gas into the insulating nozzle to puff out the arc produced between the two arcing electrodes when the breaker is in motion for circuit breaking, and a movable shield device for relieving the concentration of an electric field at the front end of the first arcing electrode during the breaker motion for circuit breaking. When the breaker is closed and the circuit made, the movable shield device surrounds the first arcing electrode and insulating nozzle, with a predetermined gap between itself and the insulating nozzle opposite thereto, and is kept at the same potential as the first arcing electrode. The circuit breaker further includes a device for maintaining the predetermined gap and the same potential at least in the early stage of the breaker motion for current breaking.
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公开(公告)号：SE7610464L
公开(公告)日：1977-03-23
申请号：SE7610464
申请日：1976-09-21
Applicant: HITACHI LTD
Inventor： SATO M , TAKAHASHI I , KURASAWA T , YOSHIOKA Y , NAKAGAWA Y
IPC: H01H33/24 , H01H33/915 , H01H33/91
Abstract: A puffer type gas circuit breaker comprises a first and a second arcing electrodes movable relative to each other, an insulating nozzle surrounding the second arcing electrode, a puffer device for introducing an arc-suppressing gas into the insulating nozzle to puff out the arc produced between the two arcing electrodes when the breaker is in motion for circuit breaking, and a movable shield device for relieving the concentration of an electric field at the front end of the first arcing electrode during the breaker motion for circuit breaking. When the breaker is closed and the circuit made, the movable shield device surrounds the first arcing electrode and insulating nozzle, with a predetermined gap between itself and the insulating nozzle opposite thereto, and is kept at the same potential as the first arcing electrode. The circuit breaker further includes a device for maintaining the predetermined gap and the same potential at least in the early stage of the breaker motion for current breaking.
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