Patents Assigned to DSO "Bulgarski Darjavni Jeleznitzi"
  • Method of measuring a railway-vehicle load
    Patent number: 4015675
    Abstract: The load of a railroad car is measured by placing the base of a measuring device upon the flange of a track along which the railroad car is displaceable. The lower leg of a U-shaped member is lifted to bring the upper leg of this member into engagement with the vehicle wheel. A lever is fulcrumed on the lower leg and has one side biased by the free upper arm while the other side acts upon a meter displaying the load.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: April 5, 1977
    Assignee: DSO "Bulgarski Darjavni Jeleznitzi"
    Inventor: Tzvyatko Penchev Stanev
  • Method and apparatus for impact testing railroad cars
    Patent number: 3939691
    Abstract: A railway-car impact-testing method and apparatus whereby the active railway-car is caused to move down an incline and impact against a passive railway-car, the momentum of which is braked by a force storing means which then transfers stored force to the latter car to displace the cars in the opposite direction. A drive rope flanking the rails is used to displace the cars to their respective positions or to brake the displacement of the cars.
    Type: Grant
    Filed: September 10, 1973
    Date of Patent: February 24, 1976
    Assignee: DSO "Bulgarski Darjavni Jeleznitzi"
    Inventors: Tzvyatko Penchev Stanev, Adrian Kostov Lambiev