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    Electric indicating device
    6.
    发明授权
    Electric indicating device 失效
    电指示装置

    公开(公告)号：US1433078A

    公开(公告)日：1922-10-24

    申请号：US41813120

    申请日：1920-10-19

    申请人： SIEMENSSCHUCKERTWERKE GMBH

    发明人： FRIEDRICH HULSS

    IPC分类号： G01R31/36

    CPC分类号： G01R31/3627 ,  G01R31/3682

    摘要： 139,822. Siemens - Schuckertwerke. Dec. 5, 1914, [Convention date]. Systems for continuous-current motors only.- The difference between the outputs of two storage batteries a, b is indicated directly by a quantity meter h oppositely influenced by current therefrom, which meter also indicates from which battery the greater output has been taken. By means of switches s, t and a change-over switch u, either of the batteries a, b may be connected to the motor m of an electrically-driven submarine, or both may be connected in series for higher speeds. The meter pointer may close the circuit of a bell or other signalling device when the maximum permissible difference in output has been taken from either battery, thus indicating when the switch u should be changed over. The meter h may be adapted to be placed in both battery circuits, or in a circuit conveying the difference of their currents, as shown.