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    Improvements in Controllers for Electric Motors.
    1.
    发明专利
    Improvements in Controllers for Electric Motors. 未知

    公开(公告)号：GB190325146A

    公开(公告)日：1904-11-17

    申请号：GB190325146D

    申请日：1903-11-18

    Applicant: LAIRD GEORGE ,  TODD JOHN PERCIVAL

    Inventor： LAIRD GEORGE ,  TODD JOHN PERCIVAL

    Abstract: 25,146. Laird, G., and Todd, J. P. Nov. 18. Motors, controlling.-Relates to the operation of motor controllers having a braking position and also separate reversing and controlling drums, the controller being operated by a single lever. The reversing-drum is adapted to be connected to the operating-lever by pins or plungers, so that, when in the 'off' position, it can be moved in either direction, the operating-lever being moved in one direction for 'control' whether the motor is running in the forward or backward direction. Figs. 1 and 2 shows one arrangement, in which the operating- lever 5 is mounted on the controlling- drum shaft 4, and is provided with two plungers 7, 8, either one of which can be depressed, when the switch is in the 'off' position, and caused to engage with a groove 3 in the head 2 of the reversing-drum. The plungers have enlarged heads 9 which are admitted through holes in the top of the controller casing, and the shanks of the plungers can slide in a groove 13 or 14 in the casing when the handle is moved. The plungers are carried by a pivoted lever 15 operated by a push 21. By manipulating the push 21 the handle 19 is moved in the Fame direction for 'control,' although the reversing-drum may be set for forward or backward running. In a modified form, Fig. 4, the reversing-drum 22 is loose on the shaft 4, and is operated from the grooved head or plate 27 by geared quadrants. In another modification, the lever is fitted with two handles, in each of which is a push similar to 21. Each push controls one of the plungers. In the form shown in Fig. 9, one plunger only is used, but is fitted in a sliding carrier 35, which may be moved into the position shown in dotted lines when it is desired to turn the reversing-drum in the opposite direction. In another modification, the carrier is connected to the handle which slides in a groove in the lever. In this arrangement, the plunger is operated by a push in the handle. In all the arrangements, a lost motion is provided for the reversing-drum, so that, after it has been moved, the operating-handle can continue its movement in the same direction without interfering with the reversing-drum.

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