公开(公告)号：GB190108146A

公开(公告)日：1902-04-19

申请号：GB190108146D

申请日：1901-04-20

Applicant: STEWART DUNCAN ,  WISHART THOMAS

Inventor： STEWART DUNCAN ,  WISHART THOMAS

Abstract: 8146. Stewart, D., and Wishart, T. April 20. Switches.-Relates to electrically-actuated centrifugal machines of the self-balancing type. To facilitate the starting and stopping of the machine, the motor is controlled by a switch, Fig. 3, in which; upon turning the arm m in one direction, current is first directed through the armature c, one set of the coils h of the field magnets, resistances, and the other set of magnet coils, in series ; the resistances are gradually cut out ; then one set of the field-magnet coils is cut out ; next the two sets of magnets are placed in parallel for the steady running of the machine, and the resistance cut out. By moving the arm back beyond the central position, the current in the armature is reversed, which quickly brings the machine to rest.