Patents by Inventor Gijsbertus W. Turk

Gijsbertus W. Turk 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 manufacturing a permanent magnet
    Patent number: 4857118
    Abstract: Permanent magnets are manufactured by grinding a magnetic phase having the composition RE.sub.2 (Fe, Co).sub.14 B with a non-magnetic phase, orienting it magnetically, densifying and then sintering it. The non-magnetic phase may be a hydride of either a rare earth metal or alloy thereof. The second phase must have a melting point lower than the magnetic phase.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: August 15, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Reinoud Van Mens, Gijsbertus W. Turk
  • Magnetic head with anisotropy in plane of core ports
    Patent number: 4685012
    Abstract: A magnetic head having a core of a magnetizable material around a part of which a coil is provided. A transducing gap is formed between two core parts of a magnetically anisotropic, amorphous ferromagnetic metal. The core parts of a magnetically anisotropic, amorphous ferromagnetic material have a magnetic anisotropy direction induced by a thermal treatment in a magnetic field which is in the plane of the core parts and encloses an angle .alpha. with the direction in which magnetic flux traverses the core parts during operation. .alpha. preferably is equial to 90.degree.. By these means an increased permeability in the MHz range is reached in combination with a minimum loss component.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: August 4, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Hendrik J. De Wit, Marcel Brouha, Ulrich E. Enz, Kornelis Jager, Albertus J. C. Van Der Borst, Gijsbertus W. Turk