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    • 4. 发明专利
    • Improvements in or relating to Liquid Electric Motor Starters and Controllers
    • GB190607668A
    • 1907-03-28
    • GB190607668D
    • 1906-03-30
    • OLIVE JAMESSWARBRICK FREDERICK
    • OLIVE JAMESSWARBRICK FREDERICK
    • 7668. Olive, J., and Swarbrick, F. March 30. Switches.-A liquid electromotor starter is pro-. vided with a no-load release magnet for securing the insertion of the resistances, and with connexions so that, when the motor is stopped, it discharges through the resistance. Figs. 2, 3, and 4 show the construction, and Fig. 6 is a diagram of the connexions. The casing A is divided into two compartments by the partition p, on one side of which is fitted the no-load magnet m and the switch s for controlling the shunt field, and on the other the tank t for the solution and oil. The moving contact or electrode c is connected by a cable g to a pulley, and is electrically connected to the spindle s. The pulley also serves to lift up the heavy armature m of the no-load magnet m. This armature normally raises the electrode c , and in its lowest position operates a switch s to open the field magnet circuit. When the handle h is turned, the armature m is raised, allowing the switch s to close the field circuit, and the contact c to drop to cut out the resistance. The armature when in the highest position entirely short-circuits the resistance through the contacts k , k and conductor g . The electrode c carries a plate d nearly fitting the cylindrical vessel c, aud this acts to prevent a too-rapid movement of the electrode. When the line switch is opened, the motor disoharges through the resistance until the armature has fallen and opened the switch s . According to the Provisional Specification, the armature m@ is provided with roller contacts engaging copper strips on the partition ; also, a locking-means is provided for preventing operation of the switch when the level of the electrolyte falls below a certain level.