Patents by Inventor Cesare De Paolis

Cesare De Paolis 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).

  • Lateral magnetic shielding for color CRT
    Patent number: 6911769
    Abstract: Color cathode-ray tube comprising a color selection mask (16) held under tension between a first pair of opposed long sides (30) of an approximately rectangular metal frame (21), a main magnetic screen (22) placed at the rear of the frame in the funnel-shaped part (11) of the tube's envelope, and additional means (50) for forming a screen against the Earth's magnetic field in the part lying along the second pair of opposed short sides of the frame.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: June 28, 2005
    Assignee: Thomson Licensing S.A.
    Inventors: Goffredo Antonelli, Cesare De Paolis, Giuseppe Giannantonio, Paolo Ginesti
  • Shield for a tension masks in a cathode ray tube
    Patent number: 6727638
    Abstract: A method and apparatus for improving magnetic shielding in mask-frame-assemblies. The system includes providing a cathode ray tube, a mask frame assembly disposed within the cathode ray tube and at least one magnetic shield disposed on the edge of the mask frame assembly. These magnetic shields provide shielding for the horizontal component of the terrestrial magnetic field and thus reduces distortion in the picture displayed on the tube.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: April 27, 2004
    Assignee: Thomson Licensing S.A.
    Inventors: Cesare De Paolis, Goffredo Antonelli, Giuseppe Giannantonio, Paolo Ginesti
  • Lateral magnetic shielding for color crt
    Publication number: 20030189397
    Abstract: Color cathode-ray tube comprising a color selection mask (16) held under tension between a first pair of opposed long sides (30) of an approximately rectangular metal frame (21), a main magnetic screen (22) placed at the rear of the frame in the funnel-shaped part (11) of the tube's envelope, and additional means (50) for forming a screen against the Earth's magnetic field in the part lying along the second pair of opposed short sides of the frame.
    Type: Application
    Filed: March 24, 2003
    Publication date: October 9, 2003
    Inventors: Goffredo Antonelli, Cesare De Paolis, Giuseppe Giannantonio, Paolo Ginesti
  • Method and apparatus that provides magnetic shielding for tension masks in a color picture tube
    Publication number: 20020079810
    Abstract: A method and apparatus for improving magnetic shielding in mask-frame-assemblies. The system includes providing a cathode ray tube, a mask frame assembly disposed within the cathode ray tube and at least one magnetic shield disposed on the edge of the mask frame assembly. These magnetic shields provide shielding for the horizontal component of the terrestrial magnetic field and thus reduces distortion in the picture displayed on the tube.
    Type: Application
    Filed: December 22, 2000
    Publication date: June 27, 2002
    Inventors: Cesare De Paolis, Goffredo Antonelli, Giuseppe Giannantonio, Paolo Ginesti
  • Device to shield mask cathode tubes from the earth's magnetic field
    Patent number: 4940920
    Abstract: To improve the trichromatic cathode tube shielding effect given by the frame-mask set and by a shielding material made with material of low magnetic permeability, the external conductors of a de-magnetization coil with two loops are made to pass in front of the fastening lugs and not behind the frit plane as was the case before, and the position of the internal conductors is set to obtain the best compromise.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: July 10, 1990
    Assignee: Videocolor
    Inventors: Guiseppe Giannantonio, Cesare de Paolis
  • Process and apparatus for the rapid adjustment of the static convergence and purity in a television tube, by using a permanent magnet
    Patent number: 4636694
    Abstract: Process for adjusting the static convergence and/or purity of a color television tube by using a magnetic ring surrounding the neck of the tube and coils creating in this ring induction poles of values selected to carry out the adjustment. To the terminals of each coil a current impulse is applied conferring on the remanent induction an important value higher than that necessary to carry out the correction; then a current impulse is applied in the opposite direction effecting a partial demagnetization in such a way that the remanent induction allows the desired adjustment.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: January 13, 1987
    Assignee: Videocolor
    Inventors: Cesare De Paolis, Guiseppe Giannantonio, Claude Pons