Granville-phillips Company

Craig B Van Cleve

Daniel Granville Bills

Paul C Arnold

Stephen L Dodgen

An ionization gauge of the type including a source of electrons, an accelerating electrode for accelerating said electrons through a volume generally defined by said accelerating electrode and a collector electrode, disposed in the volume. Ions are collected by the collector electrode. The accelerating electrode comprises a substantially closed anode having an internal cavity to precisely define the volume. An aperture is disposed to admit said electrons from the source into the closed volume.

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Boulder, CO, United States of America

Craig B Van Cleve