Patents by Inventor Norbert H. Drewell

Norbert H. Drewell 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).

  • Simultaneous double sided irradiation
    Patent number: 5847401
    Abstract: An apparatus for delivering a beam of charged particles along two separate beam paths comprising a pulsed charged particle beam source for producing a series of beam pulses along a first beam path, a switching magnet for developing a magnetic field, and a power supply means for selectively applying current pulses to said switching magnet in timed relation to each of a plurality of predetermined beam pulses effective to develop a constant magnetic field throughout the period of each predetermined beam pulse and deflect each entire predetermined beam pulse from said first beam path to a second beam path.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: December 8, 1998
    Assignee: Atomic Energy of Canada Limited
    Inventors: Joseph McKeown, Marshall R. Cleland, Norbert H. Drewell, Courtlandt B. Lawrence, Walter Garfield Davies
  • Electron beam current measuring device
    Patent number: 5451794
    Abstract: An electron linear accelerator for use in industrial material processing, comprises an elongated, resonant, electron accelerator structure defining a linear electron flow path and having an electron injection end and an electron exit end, an electron gun at the injection end for producing and delivering one or more streams of electrons to the electron injection end of the structure during pulses of predetermined length and of predetermined repetition rate, the structure being comprised of a plurality of axially coupled resonant microwave cavities operating in the .pi./2 mode and including a graded-.beta. capture section at the injection end of the structure for receiving and accelerating electrons in the one or more streams of electrons, a .beta.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: September 19, 1995
    Assignee: Atomic Energy of Canada Limited
    Inventors: Joseph McKeown, Stuart T. Craig, Norbert H. Drewell, Jean-Pierre Labrie, Court B. Lawrence, Victor A. Mason, James Ungrin, Bryan F. White
  • Industrial material processing electron linear accelerator
    Patent number: 5434420
    Abstract: An electron linear accelerator for use in industrial material processing, comprises an elongated, resonant, electron accelerator structure defining a linear electron flow path and having an electron injection end and an electron exit end, an electron gun at the injection end for producing and delivering one or more streams of electrons to the electron injection end of the structure during pulses of predetermined length and of predetermined repetition rate, the structure being comprised of a plurality of axially coupled resonant microwave cavities operating in the .pi./2 mode and including a graded-.beta. capture section at the injection end of the structure for receiving and accelerating electrons in the one or more streams of electrons, .beta.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: July 18, 1995
    Assignee: Atomic Energy of Canada Limited
    Inventors: Joseph McKeown, Stuart T. Craig, Norbert H. Drewell, Jean-Pierre Labrie, Court B. Lawrence, Victor A. Mason, James Ungrin, Bryan F. White
  • Industrial material processing electron linear accelerator
    Patent number: 5401973
    Abstract: An electron linear accelerator for use in industrial material processing, comprises an elongated, resonant, electron accelerator structure defining a linear electron flow path and having an electron injection end and an electron exit end, an electron gun at the injection end for producing and delivering one or more streams of electrons to the electron injection end of the structure during pulses of predetermined length and of predetermined repetition rate, the structure being comprised of a plurality of axially coupled resonant microwave cavities operating in the .pi./2 mode and including a graded-.beta. capture section at the injection end of the structure for receiving and accelerating electrons in the one or more streams of electrons, a .beta.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: March 28, 1995
    Assignee: Atomic Energy of Canada Limited
    Inventors: Joseph McKeown, Stuart T. Craig, Norbert H. Drewell, Jean-Pierre Labrie, Court B. Lawrence, Victor A. Mason, James Ungrin, Bryan F. White