Patents by Inventor Damir Kudeljan

Damir Kudeljan 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).

  • System for monitoring the operation of a cage moving in a mine shaft
    Patent number: 5070967
    Abstract: A pulse encoder digitally derives a first value of speed at which the cage is moving at any given time. An analog device, such as a tachogenerator, derives the second value of the speed, in analog form, at which the cage is moving at the same time. The two speeds are compared in a comparator to determine the differences therebetween. If the difference exceeds a predetermined limit, an emergency stop is tripped to arrest the motion of the cage.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: December 10, 1991
    Assignee: Asea Brown Boveri Inc.
    Inventors: Klaus Katzy, Bruno Leijon, Damir Kudeljan
  • Control system for an externally controlled converter
    Patent number: 3932766
    Abstract: An improved control system for providing firing pulses to an externally controlled converter in which the firing pulses are formed by comparing a comparison voltage which is proportional to the voltage time area of the synchronizing voltage with a variable DC control voltage to thereby decrease the sensitivity of the control system to frequency changes, harmonics on the line voltage and commutation interference.
    Type: Grant
    Filed: July 23, 1973
    Date of Patent: January 13, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventors: Damir Kudeljan, Klaus Rambold