Patents Examined by Gerard P. Strecker
  • Ionization vacuum gauge using a cold micropoint cathode
    Patent number: 5278510
    Abstract: Ionization vacuum gauge comprising, like Bayard Alpert gauges, in a chamber (1) containing an extremely low pressure atmosphere, whose ultra-vacuum degree it is desired to be measured, an electron source cathode (2), a grid (3) for collecting these electrons and surrounding a collector (4) of ions resulting from the impact of the electrons on the gas molecules of the extremely low pressure atmosphere, wherein the electron source is a cold micropoint cathode.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: January 11, 1994
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Robert Baptist, Christophe Py