Patents by Inventor Jelmer Dorreboom

Jelmer Dorreboom 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: 4346418
    Abstract: A method for making a multitrack head is disclosed wherein, by use of two separate alignment structures, a head having a large number of perfectly aligned cores, with perfect track-to-track spacing, is provided. The described multitrack head, by virtue of the inventive alignment technique, acquires a plurality of lead-protecting channels, the leads which are associated with the head coils being carried through such channels.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: August 24, 1982
    Assignee: Spin Physics, Inc.
    Inventors: Dennis F. Cullum, Jelmer Dorreboom
  • Patent number: 4114259
    Abstract: The front face of a multitrack magnetic head has a stack of track defining pole pairs and spacers between the pole pairs of adjacent tracks. The spacers are slotted, and shields reside in the slots. A chamfer runs longitudinally of the stack. Embracing opposite sides of the stack and parallel to the chamfer, are non-magnetic wing parts, such parts being part of a surround used in the manufacture of the front face. Bonding glass, in the form of a unitary "lattice" fills the chamfer, and the spacings between the ceramic and shields, and the wing parts and stack.The method for forming the head employs a surround having a depth greater than the depth of the stack, thereby forming a basin for accepting the bonding glass.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: September 19, 1978
    Assignee: Spin Physics, Inc.
    Inventor: Jelmer Dorreboom
  • Patent number: 4084199
    Abstract: The front face of a multitrack magnetic head has a stack of track defining pole pairs and spacers between the pole pairs of adjacent tracks. The spacers are slotted, and shields reside in the slots. A chamfer runs longitudinally of the stack. Embracing opposite sides of the stack and parallel to the chamfer, are non-magnetic wing parts, such parts being part of a surround used in the manufacture of the front face. Bonding glass, in the form of a unitary "lattice" fills the chamfer, and the spacings between the ceramic and shields, and the wing parts and stack.The method for forming the head employs a surround having a depth greater than the depth of the stack, thereby forming a basin for accepting the bonding glass.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: April 11, 1978
    Assignee: Spin Physics, Inc.
    Inventor: Jelmer Dorreboom