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    • 7. 发明授权
    • Corrosion resistant means in exhaust control device for circuit
interrupting devices
    • 用于电路中断装置的排气控制装置中的耐腐蚀手段
    • US4001750A
    • 1977-01-04
    • US609599
    • 1975-09-02
    • Henry W. SchererRoy T. Swanson
    • Henry W. SchererRoy T. Swanson
    • H01H33/57H01H85/43H01H85/38
    • H01H33/57H01H85/43
    • An improvement in an exhaust device to absorb the energy of exhaust gases released during operation of a circuit interrupting device such as a power fuse or an expulsion fuse is disclosed. The exhaust control device includes a hollow housing coated with a corrosion resistant coating mounted to the circuit interrupting device by means of an adapter, composed of a corrosion resistant material such as brass, which is retained in a counterbore within the housing by rolling or folding over the extended upper rim of the housing so that the coating is not damaged. Alternatively, a steel header, welded to and plated along with the steel housing shell, within which the threaded brass adapter is installed, may also be used. The same rolling or folding operation may be used to secure a plated outlet end wall. Baffles positioned within the housing for partitioning the housing into chambers for cooling and filtering the hot exhaust gases, for changing the direction of flow of the gases and for attenuating sound are held in place by crimping the hollow housing around the baffles so that the plating is not damaged. An annular expansion space formed between the hollow housing and an inner cylindrical shell increases the surface area of the hollow housing which is exposed to the blast of exhaust gases emitted from the fuse and provides an additional expansion chamber for receiving the exhaust gases produced by the interrupting device. A labyrinth plate with circumferential notches formed therein and arcuate ridges formed within and adjacent to said notches, forms gas diverting channels and a labyrinth flow pattern exhaust path to the exit ports formed within an outlet end wall.
    • 10. 发明授权
    • Contact arrangement for electrical power distribution switch or the like
    • 电力配电开关等的接触装置
    • US06486426B2
    • 2002-11-26
    • US09808874
    • 2001-03-16
    • Roy T. Swanson
    • Roy T. Swanson
    • H01H106
    • H01H1/42
    • A contact arrangement is provided, e.g. of the type that functions as a wiping contact for a moving contact such as a pivotally mounted switch blade in an electrical power distribution switch. The contact arrangement in an illustrative embodiment includes spaced apart contact members that are biased toward each other to define predetermined contact pressure/force characteristics with respect to the interposed moving contact. The contact members in a preferred embodiment include predetermined contact areas and predetermined structural features to minimize deformation due to magnetic forces experienced in the presence of high currents. The structural features are also arranged to define current paths that increase the contact pressure. In a particular embodiment the contact areas are formed on the contact members so as to minimize the size of the moving contact.
    • 提供接触装置,例如 用作用于电力分配开关中的可枢转地安装的开关叶片的可移动触点的擦拭触点的类型。 在说明性实施例中的接触装置包括间隔开的接触构件,其相对于彼此偏压以限定相对于插入的移动接触件的预定接触压力/力特性。 在优选实施例中的接触构件包括预定的接触区域和预定的结构特征,以最小化由于存在高电流而产生的磁力所引起的变形。 结构特征还被布置成限定增加接触压力的电流路径。 在特定实施例中,接触区域形成在接触构件上,以便最小化移动接触件的尺寸。