Patents by Inventor Johan L. Palmen

Johan L. Palmen 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).

  • Transformer comprising coaxial coil formers
    Patent number: 4596974
    Abstract: A transformer comprising an outer coil former (1) having a first outer end portion (13), to which is secured a resilient device (49) which exerts a force on a first core part (47) directed towards a second outer end portion (15) of the outer coil former. Within the outer coil former (1) is arranged an inner coil former (3) having a first inner end portion (25), which is received by a recess in the first outer end portion (13) in a manner such that the resilient device engages only the first outer end portion and the first core part (47) but does not engage the first inner end portion. As a result, the resilient device not only holds the first core part in position, but also prevents the two coil formers (1,3) from moving away from each other.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: June 24, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Johannes H. Tobben, Johan L. Palmen