Patents by Inventor Joseph R. Wilkas

Joseph R. Wilkas 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).

  • Magnetic object detection
    Patent number: 3964703
    Abstract: A variable permeability magnetic object detection device including an electromagnetic sensing coil; a core disposed in the electromagnetic sensing coil having a first permeability when the core is magnetically saturated and a second different permeability when the core is magnetically unsaturated; a magnetic member proximate the electromagnetic sensing coil for providing a magnetic field in the core for operating the core in a magnetically saturated state without a magnetic object to be detected present in the area proximate the electromagnetic sensing coil, interacting with the magnetic field, and for operating the core in a magnetically unsaturated state with the magnetic object to be detected present in the area proximate the magnetic sensing coil, interacting with the field; and a detector responsive to said electromagnetic sensing coil to detect the presence of a magnetic object.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: June 22, 1976
    Assignee: Computer Identics Corporation
    Inventors: Joseph R. Wilkas, Christos B. Kapsambelis, Richard H. Tuhro, Christopher C. Reynolds
  • Magnetic object detection device
    Patent number: RE30012
    Abstract: A variable permeability magnetic object detection device including an electromagnetic sensing coil; a core disposed in the electromagnetic sensing coil having a first permeability when the core is magnetically saturated and a second different permeability when the core is magnetically unsaturated; a magnetic member proximate the electromagnetic sensing coil for providing a magnetic field in the core for operating the core in a magnetically saturated state without a magnetic object to be detected present in the area proximate the electromagnetic sensing coil, interacting with the magnetic field, and for operating the core in a magnetically unsaturated state with the magnetic object to be detected present in the area proximate the magnetic sensing coil, interacting with the field; and a detector responsive to said electromagnetic sensing coil to detect the presence of a magnetic object.
    Type: Grant
    Filed: January 19, 1978
    Date of Patent: May 29, 1979
    Assignee: Computer Identics Corporation
    Inventors: Joseph R. Wilkas, Christos B. Kapsambelis, Richard H. Tuhro, Christopher C. Reynolds