Patents by Inventor Ernest N. Schwenninger

Ernest N. Schwenninger 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).

  • Measuring glass surface temperature during annealing
    Patent number: 4114444
    Abstract: Method and apparatus for continuously monitoring the surface temperature of a glass ribbon moving through a critical portion of an annealing lehr where the rate of cooling determines whether the ribbon may be cut easily after annealing and whether the ribbon is subjected to spontaneous breakage during annealing. The temperature sensing means comprises a thermocouple junction embedded within a boron nitride plug a predetermined distance from the surface of the plug that slides in contact with a surface of the moving glass ribbon in the main portion of the ribbon that is cut into blanks of commercially acceptable glass of acceptable optical quality.
    Type: Grant
    Filed: January 5, 1977
    Date of Patent: September 19, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Ernest N. Schwenninger, Ronald L. Schwenninger
  • Measuring glass surface temperature during annealing
    Patent number: 3957475
    Abstract: Method and apparatus for continually monitoring the surface temperature of a moving glass ribbon at a given distance from the edge of the ribbon where the ribbon moves through a critical portion of an annealing lehr where the rate of cooling determines whether the ribbon may be cut easily after annealing and whether the ribbon is subjected to spontaneous breakage during annealing.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: May 18, 1976
    Assignee: PPG Industries, Inc.
    Inventors: Ernest N. Schwenninger, Wright M. Welton, Jr.