Patents by Inventor Robert L. Bergner

Robert L. Bergner 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 of treating Sm.sub.2 Co.sub.17 -based permanent magnet alloys
    Patent number: 4276097
    Abstract: The reversible temperature coefficient of magnetization of a permanent magnet alloy over the temperature range from -50 degrees C. to +150 degrees C. is lowered by heat treating the alloy in a noble gas atmosphere or in a vacuum by the steps of(a) heating the alloy at about 1150 degrees C. for 1.5 hours (b) quenching the alloy in ice water, (c) heating the alloy at about 940 degrees C. for 2 hours, (d) lowering the temperature to about 700 degrees C. and heating for one hour, (e) lowering the temperature to about 600 degrees C. and heating for one hour, (f) lowering the temperature to about 500 degrees C. and heating for 2 hours, and (g) lowering the temperature to about 400 degrees C. and heating for 10 hours.
    Type: Grant
    Filed: May 2, 1980
    Date of Patent: June 30, 1981
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert L. Bergner, Frederick Rothwarf, Arthur Tauber
  • Magnetic alloys
    Patent number: 4226620
    Abstract: Magnetic alloys of the general formula Sm.sub.2 Cu.sub.1.6 Zr.sub.0.16 Fe.sub.3.3 Co.sub.12-x M.sub.x are provided wherein M is Mn or Cr and wherein x is a value greater than zero and less than 2.1.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: October 7, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Frederick Rothwarf, Robert L. Bergner, Herbert A. Leupold, Arthur Tauber
  • Permanent magnet materials
    Patent number: 4224067
    Abstract: Compounds of the general formula Sm.sub.2-x RE.sub.x Co.sub.17-y Mn.sub.y are provided wherein RE is a rare earth element selected from the group consisting of erbium, dysprosium and gadolinium wherein x has a value greater than zero and less than 0.7 and wherein y has a value less than 2.1. The compounds are suitable for use as permanent magnet material in microwave/millimeter-wave traveling wave tubes (TWT's).
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: September 23, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Frederick Rothwarf, Robert L. Bergner, Herbert A. Leupold, Arthur Tauber
  • Method of treating a permanent magnet alloy
    Patent number: 4213802
    Abstract: The reversible temperature coefficient of magnetization of a permanent magnet alloy is lowered by (a) heating the alloy at about 1200 degrees C. for 2 hours, (b) quenching the alloy in ice water, (c) heating the alloy at about 850 degrees C. for 2 hours, (d) lowering the temperature to about 700 degrees C. and heating for one hour, (e) lowering the temperature to about 600 degrees C. and heating for one hour, (f) lowering the temperature to about 500 degrees C. and heating for one hour, (g) lowering the temperature to about 400 degrees C. and heating for four hours, and (h) lowering the temperature to about 280 degrees C. and heating for 12 hours. The method is particularly effective in lowering the reversible temperature coefficient of magnetization of the permanent magnet alloy Sm.sub.2 Cu.sub.1.6 Zr.sub.0.16 Fe.sub.3.3 Co.sub.12.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: July 22, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Frederick Rothwarf, Robert L. Bergner, Herbert A. Leupold, Arthur Tauber