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公开(公告)号：US3870927A
公开(公告)日：1975-03-11
申请号：US40348973
申请日：1973-10-04
发明人： HUGHES MICHAEL ALAN
摘要： In a capacitor voltage transformer system consisting of a capacitor chain and an electromagnetic transformer, an impedance network having a transfer function which is the inverse of the transfer function between the input and the output of the CVT under operating conditions is connected across the output of the electro-magnetic transformer to obviate distortions produced in the output due to rapidly changing input conditions.
摘要翻译： 在由电容器链和电磁变压器组成的电容器电压互感器系统中，具有与CVT的输入和输出之间的传递函数相反的传递函数的阻抗网络在操作条件下跨越 电磁变压器，以避免由于输入条件的快速变化而在输出端产生的失真。
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公开(公告)号：US3821505A
公开(公告)日：1974-06-28
申请号：US36106373
申请日：1973-05-17
发明人： WOOD A
CPC分类号： H01H1/0203
摘要： A vacuum interrupter having two contacts with co-operating contact-making parts each of which is constituted by a porous matrix of metal particles comprising chromium containing from 0.5 percent to 13.5 percent by weight carbon, or iron containing from 1.0 percent to 2.0 percent by weight carbon, metallurgically bonded together by compacting and heating under high vacuum, the interstices of the matrix being infiltrated under high vacuum with a metal which comprises copper or a copper alloy, and the infiltrated metal constituting between 10 percent and 40 percent of the volume of the infiltrated matrix. When the matrix metal is chromium the preferred range of the carbon content is 1 percent to 3 percent by weight of the matrix metal.
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3.发明授权Vacuum type circuit interrupting device with contacts of infiltrated matrix material 失效真空型电路中断装置与渗透矩阵材料接触
公开(公告)号：US3818163A
公开(公告)日：1974-06-18
申请号：US16288171
申请日：1971-07-15
发明人： ROBINSON A
CPC分类号： H01H1/0206 , C22C1/0475 , H01H1/0203 , H01J17/00 , H01J2893/0059
摘要： The specification discloses an electric circuit interrupting device in which the contacts are enclosed in an evacuated enclosure, and in which the contact material comprises a matrix of a low ductility semi-refractory metal infiltrated with a metal of high electrical conductivity. The metals are chosen so that during alternating current arcing (a) the loss of heat by vapourisation of the metals at the surface of a molten anode spot prevents the anode spot rising to a temperature at which substantial electron emission occurs, so that the ability to interrupt a high current arc at the next natural current zero is improved, and (b) precipitation alloying of the metals occurs, with consequent refinement of the matrix structure at the contact surface so that the performance of the interrupter is improved by conditioning of its contacts. Chromium and cobalt are specifically proposed as matrix metals, and copper, silver, and alloys of copper and silver are proposed as infiltrant metals.
摘要翻译： 该说明书公开了一种电路中断装置，其中触点封闭在抽真空的外壳中，并且其中接触材料包括浸渗有高导电性金属的低延性半难熔金属的基体。
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公开(公告)号：US3786296A
公开(公告)日：1974-01-15
申请号：US3786296D
申请日：1971-05-13
发明人： HOWORTH J
摘要： An ion getter pump for providing a vacuum in a high power microwave discharge tube consists of a body of radio-active material which is arranged to act as the power source for the pump. The pump has a glass support base concentrically surrounding a cathode. Mounted within the tubular cathode is a layer of radio-active isotope material and a particle receiver from which extends an anode rod. Pins are fused through the base to support the cathode, the particle receiver and the isotope material. A shield is provided to prevent sputtering of material on to the base.
摘要翻译： 用于在高功率微波放电管中提供真空的离子吸气泵由一组放射性活性材料构成，其被配置为用作泵的动力源。 泵具有同心地围绕阴极的玻璃支撑基座。 安装在管状阴极内的是一层放射性同位素材料和一个从其延伸的阳极棒的颗粒接收器。 引脚通过基底熔合以支撑阴极，颗粒接收器和同位素材料。 提供屏蔽以防止材料溅射到基底上。
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公开(公告)号：US3777197A
公开(公告)日：1973-12-04
申请号：US3777197D
申请日：1973-01-03
摘要： A dynamo electric machine which has a stator winding disposed in the rotor-stator air gap. The rotor winding comprises coils having straight axially extending side portions which are supported in trough members which have radially extending side walls the outer ends of which fit into slots in the stator core. The troughs may have cover plates also having side walls extending into the stator slots, and the troughs with the windings therein form a cylindrical structure in the air gap. This structure can be held in position closely adjacent the stator core by conformable packing or wedges associated with the side walls of the troughs and the stator slots.
摘要翻译： 一种发电机，其具有设置在转子 - 定子气隙中的定子绕组。 转子绕组包括具有直的轴向延伸侧面部分的线圈，其被支撑在槽构件中，槽构件具有径向延伸的侧壁，其外端装配到定子芯中的槽中。 槽可以具有也具有延伸到定子槽中的侧壁的盖板，并且其中具有绕组的槽形成气隙中的圆柱形结构。 这种结构可以通过与槽的侧壁和定子槽相关联的适形包装或楔形件保持在与定子芯相邻的位置。
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6.发明授权
公开(公告)号：US3668413A
公开(公告)日：1972-06-06
申请号：US3668413D
申请日：1970-05-11
CPC分类号： H02J3/36 , Y02E60/60 , Y10T307/367
摘要： The invention in this application relates to a control system for controlling the power or current in an H.V.D.C. link connected between two a.c. systems and is employed particularly to damp power oscillations developed in such systems which frequently occur after any large disturbances, such as a temporary line short circuit. In particular, the system includes apparatus for defining an output signal proportional to a change function of absolute phase angle phi of the alternating voltage in at least one of the a.c. systems, and a control circuit for controlling the converters in the d.c. link. The control circuit is responsive to a signal depending on both the output signal from the apparatus and a predetermined order signal whereby the d.c. link is controlled to have a component of variation proportional to the said change function.
摘要翻译： 本申请的发明涉及一种用于控制H.V.D.C.中的功率或电流的控制系统。 链路连接在两个a.c. 系统，并且被特别用于衰减在诸如临时线路短路的任何大的干扰之后经常发生的这种系统中产生的功率振荡。 特别地，该系统包括用于定义与交流电压的绝对相位角度phi的变化函数成比例的输出信号的装置。 系统和用于控制直流电路中的转换器的控制电路。 链接。 控制电路根据来自装置的输出信号和预定的顺序信号对信号进行响应，由此直流。 链路被控制成具有与所述改变功能成比例的变化的分量。
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公开(公告)号：US3665229A
公开(公告)日：1972-05-23
申请号：US3665229D
申请日：1971-03-31
发明人： LORCH HUGH OLAF
CPC分类号： H02K55/04 , H02K9/193 , Y02E40/625
摘要： Cryogenic machinery in which coolant fluid is supplied to a rotor via a central path, and disposed radially outwards in an annular flow space into axially extending cooling paths in the periphery of the body. Fluid is exhausted from the cooling paths via annular flow spaces at each end of the body into outlet paths concentric with the inlet path, and the outlet paths and inlet path are vacuum insulated from one another.
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公开(公告)号：US3647489A
公开(公告)日：1972-03-07
申请号：US3647489D
申请日：1969-08-13
CPC分类号： C03C10/00 , C03C10/0027
摘要： A high-alumina glass-ceramic product with a substantial proportion microcrystalline is formed from a glass by thermal treatment, the main crystal phase being beta-spodumene or betaeucryptite, and the product having a thermal coefficient of expansion of less than 40 X 10 7/*C. At least 90 percent of the composition comprises major constituents and nucleating agents as follows, in percentages by weight: Major constituents: SiO2 55-75Al2O3 15-30 Li2O 2-15MgO 0-20 Nucleating agents: P2O5, 0.5-6.0 percent, together with one of the following metallic oxides: A. MoO3 0.5-4.0 b. WO3 0.5-4.0 c.V2O5 0.52.0 d. TiO2 0.2-less than 2. The thermal coefficient of expansion is less than 40 X 10 7. An alternative nucleating agent is cadmium sulpho-selenide.
摘要翻译： 通过热处理由玻璃形成具有相当比例的微晶的高铝玻璃陶瓷产品，主晶相是β-锂辉石或β-锂辉石，并且具有小于40×10 -3的热膨胀系数的产物 > 7℃。至少90％的组合物包含主要成分和成核剂，按重量百分比计：
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公开(公告)号：US3644789A
公开(公告)日：1972-02-22
申请号：US3644789D
申请日：1968-08-05
摘要： This invention relates to an overcurrent relay in which a voltage is developed proportional to the current in an AC circuit, a two-state switch is responsive to an overcurrent condition in which the monitored voltage periodically exceeds a reference level whereby to assume one state for the duration of these periods during which this level is exceeded, a storage circuit progressively accumulates a voltage from a datum level during each period for which the switch is in its other state, and a timer is operable whenever the switch assumes its one state to actuate an output device after a predetermined delay, the timer being reset by the storage circuit each time its voltage attains a predetermined magnitude. The maximum ''''overshoot'''' of the relay, i.e., the effect which could cause the output device to operate and effect protective action even with an unsustained overcurrent, may be contained within a period just in excess of one cycle, or even less, and the pickup/dropoff ratio of the output device can practically approach the optimum value of 100 percent.
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公开(公告)号：US3617773A
公开(公告)日：1971-11-02
申请号：US3617773D
申请日：1969-01-27
CPC分类号： H02M1/096
摘要： A thyristor gating circuit embodying a bistable circuit and a constant current stage, the bistable being activated by lightresponsive control signals so as selectively to provide through this stage a constant current output of positive polarity for maintaining the thyristor conductive, and a constant current output of negative polarity for ''''blocking'''' the thyristor. A sharp positive impulse is initially produced to gate-on the thyristor during each cycle, this impulse either being developed directly in response to the control signal or being produced by resistance- Capacitance circuits coupled to the bistable.
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