公开(公告)号：US4651047A

公开(公告)日：1987-03-17

申请号：US738107

申请日：1985-05-24

Applicant: Albert A. Comberg ,  Alwin Knops ,  Heinrich A. Oepen ,  Dieter Wadow

Inventor： Albert A. Comberg ,  Alwin Knops ,  Heinrich A. Oepen ,  Dieter Wadow

IPC: H01J29/00 ,  H01J29/86 ,  H01J31/10 ,  H01J1/10 ,  H01J7/26

CPC classification number: H01J29/861 ,  H01J29/006

Abstract: A projection television display tube having an evacuated envelope (1) with a display window (4) which has a display screen (5) on its inside and in front of which a light-permeable second window (6) is provided on the outside, a cooling liquid flowing through the space (7) between the display window (4) and the second window (6) from at least one inlet aperture to at least one outlet aperture. When in such a projection television display tube a cooling jacket(8) is provided at the area of the windows (4, 6) and around the said space (7) and is provided with at least one duct (9) and one pump (16) with connecting nipples (17,18) which transport the cooling liquid from the outlet aperture to the inlet aperture or apertures of the said space (7), an effective cooling is obtained with a power up to 40 W without outer pipes and without heat exchangers. By the forced circulation of the cooling liquid a good temperature compensation is obtained so that fewer stresses occur in the glass of the display window.

Abstract translation: 一种投影电视显示管，其具有带有显示窗（4）的抽真空的外壳（1），所述显示窗（4）在其内部具有显示屏（5），其前面设有透光的第二窗（6） 冷却液体从至少一个入口孔流过显示窗（4）和第二窗（6）之间的空间（7）至至少一个出口孔。 当在这种投影电视显示管中，在窗（4,6）的区域和围绕所述空间（7）设置冷却套（8）并且设置有至少一个管道（9）和一个泵 16），其具有将冷却液从出口孔输送到所述空间（7）的入口孔或孔的连接接头（17,18），在没有外管并且没有 热交换器。 通过冷却液的强制循环，获得良好的温度补偿，使得在显示窗的玻璃中产生较少的应力。

公开(公告)号：US3668453A

公开(公告)日：1972-06-06

申请号：US3668453D

申请日：1970-07-01

Applicant: HUGHES AIRCRAFT CO

Inventor： LIAN KENNETH T ,  KNECHTLI RONALD C

IPC: H01J13/04 ,  H01J1/10 ,  H01J7/16

CPC classification number: H01J13/04 ,  H01J2893/0089

Abstract: The electrical switch device has an envelope in which is mounted a liquid-metal cathode, an anode, and a condenser. The cathode is capable of very high electron-to-atom emission ratio. A desirable value for the electron-to-atom emission ratio is on the order of 100 or more and is attainable by means of a cathode such as disclosed in U.S. Pat. No. 3,475,636, when used in the switch device. The condenser has a very much larger area than the exposed liquid metal area on the cathode, and it is kept at a low enough temperature to efficiently condense the liquid-metal vapor emitted by the cathode. With mercury used as the liquid metal, the condenser temperature is kept substantially below 0* C., preferably at about -35* C. which is just above the melting point of mercury. When arcing occurs from the liquid metal, a plasma jet of electrons, ions, and neutral particles is emitted from the arc spot. The anode is mounted between the cathode and the condenser, and it is positioned at the edge of the plasma jet to capture the major portion of the electron flow for electrical conduction. Most of the ions and neutral particles as well as a sufficient number of electrons to preserve space-charge and current neutrality, pass the anode in the plasma jet and are captured on the condenser. The combination of the high electronto-atom emission ratio of the cathode with the large, lowtemperature condenser results in an equilibrium background pressure (i.e., pressure outside the plasma jet) of at least as low as 10 3 Torr during arcing, and lower than 10 4 Torr during non-arcing periods. These low pressures are obtained by maintaining the condenser in the range of low temperatures defined above. This low background pressure, in turn, permits the essentially unperturbed propagation of the plasma jet between the cathode and the surfaces upon which it impinges, i.e., condenser and anode. Such a discharge mode is commonly referred to as a ''''vacuum arc.'''' The fact that the plasma jet is emitted only during arcing, and that the pressure within the space surrounding this jet is kept low, results in the ability to hold off electric fields up to 50 kV per centimeter between anode and cathode immediately after cessation of arcing.

公开(公告)号：US3662205A

公开(公告)日：1972-05-09

申请号：US3662205D

申请日：1970-07-02

Applicant: HUGHES AIRCRAFT CO

Inventor： LIAN KENNETH T

IPC: H01J13/04 ,  H01J1/10

CPC classification number: H01J13/04 ,  H01J2893/0089

Abstract: The electrical switch device has an envelope in which is mounted a liquid-metal cathode, an anode, and a condenser. The cathode is capable of very high electron-to-atom emission ratio. A desirable value for the electron-to-atom emission ratio is on the order of 100 or more and is attainable by means of a cathode such as disclosed in U.S. Pat. No. 3,475,636. The condenser has a very much larger area than the exposed liquid metal area on the cathode, and it is kept at a low enough temperature to efficiently condense the liquid-metal vapor emitted by the cathode. With mercury used as the liquid metal, the condenser temperature is kept substantially below 0* C., preferably at about -35* C. which is just above the melting point of mercury. When arcing occurs from the liquid metal, a plasma jet of electrons, ions, and neutral particles is emitted from the arc spot. The anode is mounted between the cathode and the condenser, and it partially intercepts the plasma jet. The combination of the high electron-to-atom emission ratio of the cathode with the large, low-temperature condenser results in an equilibrium background pressure (i.e., pressure outside the plasma jet) of at least as low as 10 3 Torr during arcing, and lower than 10 4 Torr during non-arcing periods. These low pressures are obtained by maintaining the condenser in the range of low temperatures defined above. This low background pressure, in turn, permits the essentially unperturbed propagation of the plasma jet between the cathode and the surfaces upon which it impinges, i.e., condenser and anode. Such a discharge mode is commonly referred to as a ''''vacuum arc.'''' The fact that the plasma jet is emitted only during arcing, and that the pressure within the space surrounding this jet is kept low, results in the ability to hold off electric fields up to 50 kV per centimeter between anode and cathode immediately after cessation of arcing.

公开(公告)号：US3656020A

公开(公告)日：1972-04-11

申请号：US3656020D

申请日：1970-11-18

Applicant: SPECTRA MAT INC

Inventor： CRONIN LEO J

IPC: H01J1/10 ,  H01J1/28 ,  H01J1/14

CPC classification number: H01J1/28 ,  H01J1/10

Abstract: A cathode is disclosed utilizing an emission material of barium oxide, calcium oxide and lithium oxide.

Abstract translation: 公开了利用氧化钡，氧化钙和氧化锂的发射材料的阴极。