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US 4,047,101 AGranted
Filament for alkali metal ionization detector
AssigneeWestinghouse Electric Corp.
InventorsJames E. Bauerle, William H. Reed, Edgar Berkey
Life of this patent
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Abstract
An oxide coated filament exhibiting surface ionization and electron conductivity characteristics is employed in alkali metal ionization detectors to provide extended filament operating life.
Claims8
An alkali metal ionization detector comprising:
- a thermal ionizer means consisting of a first electrode having an oxide protective coating for responding to impinging alkali metal atoms and compounds present in a carrier gas by producing positive alkali metal ions by thermal surface ionization of the alkali metal atoms and compounds,
- first circuit means for maintaining the temperature of said thermal ionizer means at a temperature to ionize said alkali metal atoms and compounds,
- second electrode means, and
- second circuit means for establishing a flow of said positive alkali metal ions from said thermal ionizer means to said second electrode, said flow of positive alkali metal ions being indicative of the concentration of said alkali metal present in said carrier gas.
1 more element
Dependencies are inferred from the claim text.