Patents by Inventor Virgil P. Quirk

Virgil P. Quirk 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: 4109667
    Abstract: A hair setting roller includes a dielectric cylinder encircled by an electrical resistance magnetic heating element secured to it and adapted to be attracted by a permanent magnet mounted in apparatus having a pair of laterally spaced electric supply contacts. Electrically connected to the opposite ends of the heating element are electric contacts for engaging the supply contacts while the magnet overcomes a force tending to separate the roller and magnet, whereby to heat the heating element electrically. The heating element has a magnetic permeability that decreases as its temperature increases until the attraction of the magnet for the device becomes weaker than the separating force acting on the roller.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: August 29, 1978
    Assignee: Stackpole Carbon Company
    Inventor: Virgil P. Quirk