Patents by Inventor Harry E. Pattee

Harry E. Pattee 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).

  • Patent number: 4248373
    Abstract: A method is provided for the explosive welding together of sections of large diameter metal pipe of the kind used in the construction of high volume oil and gas pipelines. In the method, internal and external band charges of welding explosive are simultaneously detonated adjacent to overlapped telescoped pipe ends. The welding charges are detonated simultaneously by means of very high detonation velocity initiation explosive charges placed along a leading edge of each welding explosive charge. The initiating explosive charges are each set off by a single detonator means. The velocity of detonation of the initiating explosive is selected so that welding charges are simultaneously detonated around the pipes while maintaining the detonation fronts at superimposed locations and at a large angle to the pipe axis. This avoids unbalancing forces on the pipes and minimizes the collision of circumferential shock waves thus preventing pipe damage and imperfect welds.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: February 3, 1981
    Assignee: Canadian Industries Limited
    Inventors: Vonne D. Linse, Harry E. Pattee
  • Patent number: 4195279
    Abstract: A method and apparatus for attaching strain gages to substrates is described, which is especially useful for field installation, and especially for materials which experience a drastic reduction in fatigue strength when heated as in spot welding. A strain gage having a backing plate is attached to a substrate by using a foil of brazing material between the backing plate and substrate. A pair of electrodes that are connected to a current source, are applied to opposite sides of the backing plate, so that heating of the structure occurs primarily along the relatively highly conductive foil of brazing material. Field installations are facilitated by utilizing a backing plate with "wings" extending at an upward incline from either side of the backing plate, by attaching the electrodes to the wings to perform the brazing operation, and by breaking off the wings after the brazing is completed.
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: March 25, 1980
    Inventors: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Meyer M. Lemcoe, Harry E. Pattee