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10 条记录 (耗时 0.012 秒)

    Solar energy collector
    2.
    发明授权
    Solar energy collector 失效
    太阳能收集器

    公开(公告)号：US4153041A

    公开(公告)日：1979-05-08

    申请号：US791017

    申请日：1977-04-26

    申请人： Didier Grauleau ,  Jean Mourier ,  Arvind Shroff ,  Jacques Villain

    发明人： Didier Grauleau ,  Jean Mourier ,  Arvind Shroff ,  Jacques Villain

    IPC分类号： F24S10/40 ,  F24S10/95 ,  F24J3/02

    CPC分类号： F24J2/055 ,  F24J2/32 ,  Y02E10/44 ,  Y10S126/908

    摘要： A device for collecting solar energy and conveying it to a zone to be heated. It comprises a tube in two parts, the first part (evaporator) being surrounded by a vacuum and being covered with a heat absorbing material and exposed to the solar radiation. The tube contains a fluid which vaporized in the first part and absorbs heat and condenses in the second part and gives up the previously-stored heat. The fluid in the liquid phase is returned to the first part by a capillary system.

    摘要翻译： 用于收集太阳能并将其输送到待加热区域的装置。 它包括两部分的管，第一部分（蒸发器）被真空包围并被吸热材料覆盖并暴露于太阳辐射。 管包含在第一部分中蒸发并在第二部分中吸收热量并冷凝的流体，并放弃先前存储的热量。 液相中的液体通过毛细管系统返回到第一部分。

    Delay line for a traveling-wave tube cooled by heat pipes and a traveling-wave tube comprising a delay line of this type
    4.
    发明授权
    Delay line for a traveling-wave tube cooled by heat pipes and a traveling-wave tube comprising a delay line of this type 失效
    由热管冷却的行波管的延迟线和包括这种延迟线的行波管

    公开(公告)号：US4471266A

    公开(公告)日：1984-09-11

    申请号：US316683

    申请日：1981-10-30

    申请人： M. Georges Fleury ,  Arvind Shroff

    发明人： M. Georges Fleury ,  Arvind Shroff

    IPC分类号： H01J23/00 ,  H01J23/24 ,  H01J25/34

    CPC分类号： H01J23/24 ,  H01J23/005

    摘要： A coupled-cavity delay line for traveling-wave tubes is provided with a cooling system which permits heat distribution along the entire length of the delay line and ensures that the outer surface of the vacuum enclosure is isothermal. The cooling system consists of a cylindrical sleeve containing heat pipes. The cylindrical sleeve is located between the external wall of the resonant cavities and the permanent magnets. The heat pipes are disposed at uniform angular intervals within the double-walled sleeve and extend lengthwise along the delay line.

    摘要翻译： 用于行波管的耦合腔延迟线设置有冷却系统，其允许沿延迟线的整个长度的热分布，并且确保真空外壳的外表面是等温的。 冷却系统由包含热管的圆柱形套管组成。 圆柱形套筒位于谐振腔的外壁和永磁体之间。 热管在双壁套管内以均匀的角度间隔设置，并沿延迟线纵向延伸。

    Heating element for indirectly heated cathode and method for the manufacture of such an element
    5.
    发明授权
    Heating element for indirectly heated cathode and method for the manufacture of such an element 失效
    用于间接加热阴极的加热元件和用于制造这种元件的方法

    公开(公告)号：US4427916A

    公开(公告)日：1984-01-24

    申请号：US232571

    申请日：1980-02-09

    申请人： Arvind Shroff

    发明人： Arvind Shroff

    IPC分类号： H01J1/24 ,  H01J1/14 ,  H01J17/06 ,  H01K1/04

    CPC分类号： H01J1/24

    摘要： This heating element is constituted by a filament and a mixture, fritted at between 1700.degree. and 1800.degree. C., of alumina and less than 10% by weight of yttrium oxide. This mixture fills the space left free by the filament within the cylinder closed by an emissive disk forming the cathode.

    摘要翻译： 该加热元件由在1300℃至1800℃之间烧结的氧化铝和小于10重量％的氧化钇的长丝和混合物构成。 该混合物填充由由形成阴极的发射盘封闭的圆筒内的细丝留下的空间。

    Process for the manufacture of an impregnated cathode and a cathode obtained by this process
    6.
    发明授权
    Process for the manufacture of an impregnated cathode and a cathode obtained by this process 失效
    通过该方法获得的浸渍阴极和阴极的制造方法

    公开(公告)号：US5334085A

    公开(公告)日：1994-08-02

    申请号：US887663

    申请日：1992-05-26

    申请人： Arvind Shroff

    发明人： Arvind Shroff

    IPC分类号： B22F3/26 ,  B22F5/00 ,  H01J1/14 ,  H01J1/28 ,  H01J9/04

    CPC分类号： H01J1/28 ,  H01J9/04

    摘要： The invention relates to a manufacturing process for an impregnated cathode for an electron tube and the impregnated cathode obtained in this manner. The method consists in mixing (b) a powder (Y) containing the emissive elements (generally barium and calcium aluminates) with powder (W) of at least one refractory metal (generally tungsten, if necessary mixed with a platinum ore metal), then pressing (c) this mixture into a pellet (1) which is then sintered (d) at a high temperature in hydrogen (approx. 2000.degree. C.). In the prior art of this method, a powder of at least one refractory metal was pressed and sintered and then impregnated, machined, cleaned, etc. The process according to the invention therefore saves many steps in the manufacture of an impregnated cathode with respect to the prior art.

    摘要翻译： 本发明涉及一种用于电子管的浸渍阴极和以这种方式获得的浸渍阴极的制造方法。 该方法包括将含有发光元素（通常为钡和铝酸钙）的粉末（Y）与至少一种难熔金属（通常为钨，如果需要与铂矿金属混合））的粉末（W）混合（b） 将（c）该混合物压制成颗粒（1），然后在高温（约2000℃）下烧结（d）。 在该方法的现有技术中，将至少一种难熔金属的粉末压制并烧结，然后浸渍，机加工，清洁等。因此，根据本发明的方法在制造浸渍的阴极方面相对于 现有技术

    Direct heating cathode for high frequency thermionic tube
    7.
    发明授权
    Direct heating cathode for high frequency thermionic tube 失效
    直接加热阴极用于高频热离子管

    公开(公告)号：US4429250A

    公开(公告)日：1984-01-31

    申请号：US303464

    申请日：1981-09-18

    申请人： Guy Clerc ,  Arvind Shroff

    发明人： Guy Clerc ,  Arvind Shroff

    IPC分类号： H01J1/15 ,  H01J23/05 ,  H01J1/16

    CPC分类号： H01J23/05 ,  H01J1/15

    摘要： A direct heating thermionic emission cathode for high frequency tubes of the diode, tetrode or pentode type. It comprises a pyrolytic graphite support and a lanthanum hexaboride-based thermoemissive material, these elements being separated by a layer which constitutes a diffusion barrier and comprises a tantalum or hafnium carbide, a metal of the platinum group or a boron compound.

    摘要翻译： 用于二极管，四极管或五极管型高频管的直接加热热电子发射阴极。 它包括热解石墨载体和基于六硼化镧的热发射材料，这些元素由构成扩散阻挡层的层分开，并且包含钽或碳化铪，铂族金属或硼化合物。

    Thermionic cathode having an embedded grid, process for its fabrication, and high frequency electron tubes using such a cathode
    10.
    发明授权
    Thermionic cathode having an embedded grid, process for its fabrication, and high frequency electron tubes using such a cathode 失效
    具有嵌入式栅格的热电阴极，其制造方法以及使用这种阴极的高频电子管

    公开(公告)号：US4302702A

    公开(公告)日：1981-11-24

    申请号：US904240

    申请日：1978-05-09

    申请人： Jean Montgaillard ,  Arvind Shroff

    发明人： Jean Montgaillard ,  Arvind Shroff

    IPC分类号： H01J1/28 ,  H01J9/04 ,  H01J23/04 ,  H01J1/46 ,  H01J17/04 ,  H01J19/38 ,  H01J21/10

    CPC分类号： H01J23/04 ,  H01J1/28 ,  H01J9/04

    摘要： The invention relates to metal oxide activated porous tungsten cathodes and methods of their manufacture. A cathode 1 of porous tungsten activated by metal oxides is mounted on a housing 2 which has a heating filament 3. On the outer face of the cathode there is a pattern or grid of pure tungsten (preferably formed by a chemical vapor deposition of WCl.sub.6 or WF.sub.6) of crystalline material the outer face of which has an orientation in the (100) or (110) plane and is parallel to the surface of the cathode. The invention will find particular use in the cathode guns of high frequency tubes such as traveling wave tubes and klystrons.

    摘要翻译： 本发明涉及金属氧化物活化的多孔钨阴极及其制造方法。 由金属氧化物活化的多孔钨的阴极1安装在具有加热丝3的壳体2上。在阴极的外表面上有纯钨的图案或格栅（优选通过化学气相沉积WCl6或 WF6），其外表面在（100）或（110）平面中具有取向并且平行于阴极的表面。 本发明将特别用于高频管如行波管和速调管的阴极枪。