Patents by Inventor Leo Meister

Leo Meister has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4506200
    Abstract: Method and apparatus for the operation of a direct current (d.c.) motor requiring no start-up resistor and accompanying switches. Regenerative braking is obtained and the torque interference in the operation is carried over to the electrical input after being dampened, due to the "soft" speed/torque characteristic. The d.c. motor is directly controlled by a technique which stimulates either the characteristics of a shunt-wound motor or a series-wound motor. A command signal is provided by an adjustable signal source which is adjusted in accordance with the armature current desired. A d.c. voltage source is controlled to provide an armature current in accordance with the command signal. When the armature voltage reaches its nominal value, a controlled d.c. current source is regulated in accordance with an error signal which is the difference between the command signal and the armature current, to regulate the excitation.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: March 19, 1985
    Assignee: SIG Swiss Industrial Company
    Inventors: Walter Datwyler, Leo Meister