Patents Examined by George E. Lowland
  • Patent number: 3971490
    Abstract: This disclosure depicts a novel rectangular-type color cathode ray tube and a method of manufacturing such a tube which insures that a phosphor screen pattern deposited on the screen area of the tube faceplate is accurately referenced to the source of electron beams for the tube. The faceplate and the tube funnel have referencing means which define faceplate and funnel reference surfaces of such number and arrangement that the faceplate and the funnel are interlocked to prevent beyond-tolerance relative movement therebetween. In a preferred structure disclosed, the faceplate has internal referencing means in three corners. The funnel has in each of three corresponding corners a pair of spaced, inside funnel reference surfaces oriented to capture the associated faceplate referencing means.
    Type: Grant
    Filed: April 22, 1974
    Date of Patent: July 27, 1976
    Assignee: Zenith Radio Corporation
    Inventor: Robert R. Conger