Patents by Inventor Stoyan M. Stoyanov

Stoyan M. Stoyanov 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).

  • Control system for electroslag remelting
    Patent number: 4669087
    Abstract: Control system for electroslag remelting having a block for recording arc discharges, the input of which is connected to the current-carrying bus bar of a crystallization mold, while its output is connected to a block for switching over the rate of electrode feed, to the second input of which there is connected the output of a presetting block, and the output of the block for switching over the rate of feed of the electrode is connected via a regulator to an actuating mechanism. The current-carrying bus bar is connected to a block for recording the rectifier valve effect, the output of which is connected via a block for operation switch-over to a third input of the block for switching-over the rate of electrode feed.
    Type: Grant
    Filed: December 8, 1983
    Date of Patent: May 26, 1987
    Assignee: Institute po Metaloznanie i Technologia na Metalite
    Inventors: Ivanka A. Rasheva, Lyudmil K. Valkov, Tzolo V. Rashev, Stoyan M. Stoyanov
  • Method and system for control of the electroslag remelting
    Patent number: 4476565
    Abstract: A method of and an apparatus for controlling an electroslag remelting furnace in which the passage of the electrode through limiting slag levels defining a no-arc zone of operation results in arcing which produces an electromagnetic emission which is detected by a separating filter and is used to control a drive for the electrode.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: October 9, 1984
    Assignee: Institute Po Metaloznante I Technologia Na Metalite
    Inventors: Tzolo V. Rashev, Lyudmil K. Valkov, Ivanka A. Rasheva, Stoyan M. Stoyanov, Danail K. Kossev, Yordan G. Lambev