Patents by Inventor Belbel Elie

Belbel Elie 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: 4864457
    Abstract: The invention provides a device for controlling an electromagnet having a coil (L) connected to an AC supply source, through a switch (T) controlled by a control circuit.This control circuit comprising a member for determining the voltage zeros of the AC current (R.sub.4, C.sub.3, D.sub.3, IN.sub.1, C.sub.4, R.sub.6, IN.sub.2), a delay element adjusted for obtaining a delay time which corresponds to the privileged control angle of the electromagnet and a switch-over device (FL) controlled by the delay element for delivering to the switch (T), following a control order, a control signal delayed by said delay time. The invention applies particularly to contactors and electromagnetic valves.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: September 5, 1989
    Assignee: La Telemecanique Electrique
    Inventors: Bataille Christian, Belbel Elie, Jean-Noel Gast, Lauraire Michel