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公开(公告)号：EP0788184B1
公开(公告)日：2003-11-12
申请号：EP97300116.7
申请日：1997-01-09
申请人： EEV LIMITED
发明人： Carr, David Ward
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公开(公告)号：EP0940680A3
公开(公告)日：2001-05-30
申请号：EP99301630.2
申请日：1999-03-04
申请人： EEV LIMITED
CPC分类号： G01N33/0014
摘要： In a catalytic sensor, a bead 1 is located within a can 2 having an aperture 3 in its front surface. The bead 1 is surrounded by thermally insulating material 9, such as glass fibre and a filter material 10 is arranged between the bead 1 and the aperture 3 in the can 2. This acts to remove H 2 S or other inhibiting gases before they reach the bead 1 and impair its performance. The thermally insulating material allows the filter material to be included whilst still permitting the bead 1 to be operated at a high temperature.
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公开(公告)号：EP1020880A2
公开(公告)日：2000-07-19
申请号：EP00300172.4
申请日：2000-01-11
发明人： Aiken, Steven
IPC分类号： H01G4/28
CPC分类号： H01G4/28 , H01J23/207 , H01J23/54 , H01J2225/04
摘要： A capacitor 1 includes a conductive tube 2, covered by insulating material 3 and a layer of conductive material 4 located at the central part of the tube 2. The geometry presents a low inherent inductance and a continuous, distributed conductance. The capacitor 1 may be used as a bypass capacitor in an IOT amplifier to reduce stray and leakage high frequency radiation, in one amplifier being located within the inner wall 11 of an annular input cavity 10.
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公开(公告)号：EP0756416B1
公开(公告)日：1999-12-15
申请号：EP96305209.7
申请日：1996-07-16
申请人： EEV LIMITED
发明人： Pool, Peter James
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公开(公告)号：EP0915494A3
公开(公告)日：1999-11-03
申请号：EP98309085.3
申请日：1998-11-05
申请人： EEV LIMITED
IPC分类号： H01J23/20 , H01J25/587 , H01J23/22 , H01J23/10
CPC分类号： H01J23/10 , H01J23/213 , H01J23/22 , H01J23/40 , H01J25/587
摘要： An anode structure for a magnetron includes T-shape anode vanes 3 having a radially extensive component 3a and a circumferentially extensive portion 3b, the cylindrical faces 3c of the circumferential portions 3b facing a cathode in the complete magnetron. The use of T-shape vanes increases inductance and hence permits low frequency radiation to be generated without increasing the dimensions of the magnetron compared to those of a conventional magnetron. Also, capacitance is increased to give a further reduction in frequency by using more than two anode straps, and preferably four anode straps 5 to 8, at each end of the anode structure. Preferably, the anode structure is incorporated in a magnetron in which a high magnetic field of the order of 500 Gauss for a magnetron operating at 100 MHz is used. The anode shell 2 itself may form part of the magnetic return path.
摘要翻译： 用于磁控管的阳极结构包括具有径向扩展部件3a和周向延伸部分3b的T形阳极叶片3，圆周部分3b的圆柱面3c面向完整磁控管中的阴极。 T形叶片的使用增加了电感，并因此允许产生低频辐射，而与传统的磁控管相比，不增加磁控管的尺寸。 而且，通过在阳极结构的每个端部使用多于两个的阳极带，并且优选地使用四个阳极带5至8，电容增加以进一步降低频率。 优选地，阳极结构被结合在磁控管中，其中对于在100MHz下操作的磁控管使用500高斯量级的高磁场。 阳极壳2本身可以形成磁回路的一部分。
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公开(公告)号：EP0915494A2
公开(公告)日：1999-05-12
申请号：EP98309085.3
申请日：1998-11-05
申请人： EEV LIMITED
IPC分类号： H01J23/20 , H01J25/587 , H01J23/22 , H01J23/10
CPC分类号： H01J23/10 , H01J23/213 , H01J23/22 , H01J23/40 , H01J25/587
摘要： An anode structure for a magnetron includes T-shape anode vanes 3 having a radially extensive component 3a and a circumferentially extensive portion 3b, the cylindrical faces 3c of the circumferential portions 3b facing a cathode in the complete magnetron. The use of T-shape vanes increases inductance and hence permits low frequency radiation to be generated without increasing the dimensions of the magnetron compared to those of a conventional magnetron. Also, capacitance is increased to give a further reduction in frequency by using more than two anode straps, and preferably four anode straps 5 to 8, at each end of the anode structure. Preferably, the anode structure is incorporated in a magnetron in which a high magnetic field of the order of 500 Gauss for a magnetron operating at 100 MHz is used. The anode shell 2 itself may form part of the magnetic return path.
摘要翻译： 用于磁控管的阳极结构包括具有径向扩大部件3a和周向延伸部分3b的T形阳极叶片3，圆周部分3b的圆柱形表面3c面对完整磁控管中的阴极。 与常规磁控管相比，T形叶片的使用增加了电感并因此允许产生低频辐射而不增加磁控管的尺寸。 此外，通过在阳极结构的每个端部处使用两个以上阳极带，并且优选地四个阳极带5至8，增加电容以进一步降低频率。 优选地，将阳极结构结合在磁控管中，在磁控管中使用大于500高斯的高磁场用于在100MHz工作的磁控管。 阳极壳体2本身可以形成磁返回路径的一部分。
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公开(公告)号：EP0909017A1
公开(公告)日：1999-04-14
申请号：EP98308209.0
申请日：1998-10-08
申请人： EEV LIMITED
IPC分类号： H03B5/10
CPC分类号： H03B5/10
摘要： An oscillator arrangement includes a triode having an anode 2, grid 3 and cathode 4 and a tank circuit 6 having a resonant frequency F. Feedback is provided to the grid 3 and a harmonic resonant circuit, or circuits, are included either between the anode 2 and the tank circuit 6 or between the cathode 4 and tank circuit 6. The arrangement enables Class D operation to be achieved with a relatively simple circuit arrangement.
摘要翻译： 振荡器装置包括具有阳极2，电网3和阴极4的三极管和具有谐振频率F的电路6.反馈被提供给电网3，并且谐波谐振电路或电路包括在阳极2 以及储能电路6或者阴极4和储能电路6之间。该装置能够以相对简单的电路布置来实现D类操作。
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公开(公告)号：EP0892930A1
公开(公告)日：1999-01-27
申请号：EP97915609.0
申请日：1997-04-04
申请人： Eev Limited
IPC分类号： G01T1
CPC分类号： G01T1/026
摘要： A detector for high energy radiation such as X-ray radiation or gamma radiation comprises a layer (1) of scintillator material, an intermediate Mylar layer (2) and a solid state detector array (3) located behind them. The intermediate layer has an atomic number which is less than that of the scintillator material or the radiation sensitive regions of the detector. Hence, secondary electrons produced at the detector region move to the intermediate layer, reducing the dose delivered by X-rays to the sensitive regions and prolonging the life of the detector.
摘要翻译： 用于高能辐射如X射线辐射或伽玛辐射的探测器包括位于它们后面的闪烁体材料层（1），中间Mylar层（2）和固态探测器阵列（3）。 中间层的原子序数小于闪烁体材料或检测器的辐射敏感区域的原子序数。 因此，在检测器区域产生的二次电子移动到中间层，减少了由X射线传递到敏感区域的剂量，并延长了检测器的寿命。
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公开(公告)号：EP0604490B1
公开(公告)日：1998-06-10
申请号：EP92919183.1
申请日：1992-09-14
申请人： EEV LIMITED
发明人： PICKERING, Alan, Hugh , ROWLANDS, Geoffrey, John , HEPPINSTALL, Roy , SOBIERADZKI, Edward, Stanley , CLAYWORTH, Geoffrey, Thomas
CPC分类号： H03F3/58 , H01J23/30 , H01J2225/04 , H01J2225/12
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公开(公告)号：EP0808509A1
公开(公告)日：1997-11-26
申请号：EP96901922.0
申请日：1996-02-08
申请人： EEV LIMITED
IPC分类号： H01J17
摘要： A device suitable for switching large currents includes, within a gas filled envelope, an anode (1), electrodes (2 and 3) and a thermionic cathode (4). Initially, the device holds off a voltage until a triggering pulse is applied to electrode (3). This causes an electron current to be established between the thermionic cathode (4) and anode (1). When the current reaches a sufficiently large value, further conduction through the device occurs via current drawn from the surface of the electrode (2) in cold cathode mode, bypassing the cathode (4).
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