Patents by Inventor Karl G. Walther

Karl G. Walther 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 magnetic testing of metallic work pieces
    Patent number: 4992732
    Abstract: Method and apparatus for inspecting weld seams by means of particles of magnetizable material which align themselves in a magnetic field in a manner characteristic of faults the particles are suspended at the start of a test in a first liquid Fl.sub.1, the particles being freely mobile in the suspension and no viscosity change of the suspension taking place. Thereafter a substance is added to the suspension which effects a change of state, the particles aligned in the magnetic field thereby being fixed in their position.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: February 12, 1991
    Assignee: Magfoil & It GmbH
    Inventors: Karl G. Walther, Ronald G. Walther
  • Apparatus for marking individual points of an underwater construction
    Patent number: 4888745
    Abstract: For marking and finding weld seams to be investigated under water ultrasonic transmitters 54 are provided which have luminous or light-reflecting characters 58. The diver brings an ultrasonic receiver 60 up to the ultrasonic transmitter 54. For more exact location determination along the weld seam 52 a tape is provided which is disposed along the weld seam 52 and has elements arranged in coded manner.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: December 19, 1989
    Assignee: Magfoil & Inspektionstechniken GmbH
    Inventors: Karl G. Walther, Ronald G. Walther
  • Alignment of ultrasonic transducer probe in pulse-echo testing
    Patent number: 3969926
    Abstract: This invention refers to an ultrasonic pulse-echo nondestructive test method and apparatus for causing the axis of an ultrasonic energy search beam path transmitted from an ultrasonic transducer probe to a workpiece to be maintained normal to an irregularly contoured workpiece entrant surface. Electrical circuit means measure and compare the echo signals reflected from the workpiece and cause the search probe to be positioned to maximize the amplitude of the received signals.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: July 20, 1976
    Assignee: Krautkramer-Branson, Incorporated
    Inventors: Philip A. Walker, Karl G. Walther