Patents by Inventor Kaj B. Hansen

Kaj B. Hansen 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).

  • Electrodynamic transducer including inset
    Patent number: 5155773
    Abstract: An electromagnetic transducer has a moving coil, a diaphragm and a magnet system enclosed within protecting covers. It includes an inset placed between the magnet system and the front cover. The inset is made of a non-magnetic, electrically insulating material and is provided with an aperture.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: October 13, 1992
    Assignee: Kirk Acoustics A/S
    Inventor: Kaj B. Hansen
  • Electrodynamic transducer
    Patent number: 4418247
    Abstract: In the method of making an electrodynamic transducer, the magnet part and the coil-diaphragm part are made in separate steps and are then assembled. The coil-diaphragm part is made in a plurality of successive stations; first a plane diaphragm material is adhered to one side of the carrier ring (10), and then a heat activatable glue is applied to the diaphragm in the region where the coil (15) is to be attached, and finally the diaphragm is formed with a heat emitting tool simultaneously with the coil (15) being pressed against the heat activated glue.The transducer has a diaphragm (13) connected to a coil (15) which is moveable in a slit (6) between the pole shoes (3, 4) of a magnet (5), the pole shoes (3, 4) being fitted coaxially on a guide pin (2).
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: November 29, 1983
    Assignee: International Standard Electric Corporation
    Inventor: Kaj B. Hansen
  • Transducer
    Patent number: D333468
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: February 23, 1993
    Assignee: Kirk Acoustics A/S
    Inventor: Kaj B. Hansen