Patents by Inventor Istvan Hamos

Istvan Hamos 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).

  • Method and apparatus for testing the condition of insulating system
    Patent number: 5150059
    Abstract: The present invention is a method and apparatus for testing the condition of insulating systems. The insulating system is charged up by a dc voltage and then discharged. The return voltage appearing after discharge is assessed and the quotient of the peak value of the return voltage and the charging voltage is measured. According to the invention the charging is done in time-interval of 10.sup.-3 -10.sup.4 seconds, with a ratio of charging to discharging time in the range of 0.1-100. The measurement cycle is repeated several times with other charging/discharging times, but with the same charge/discharge ratio. The resulting spectrum of values may be compared with a reference whereby the state of the insulating system can be assessed. An apparatus for implementing the method the apparatus for implementing the said method consists of a high voltage source, a switching circuit and voltage measuring units.
    Type: Grant
    Filed: November 7, 1990
    Date of Patent: September 22, 1992
    Assignee: B & C Diagnostics Kft.
    Inventors: Alajos Bognar, Gusztav Csepes, Istvan Hamos