Cold cathode ionization vacuum gauge with guard ring

Details Cold cathode ionization vacuum gauge with guard ring Cold cathode ionization vacuum gauge with guard ring

1992-05-28

1994-05-31

Strecker, Gerard R.

Electricity: measuring and testing

Using ionization effects

For monitoring pressure

313247, 324463, G01L 2134, H01J 188

Patent

active

053172701

ABSTRACT:
A vacuum guage of the ionisation type having a guage head comprising a substantially cylindrical cathode sleeve with an inlet at one end for communication with the vacuum with an anode positioned co-axially within the cathode sleeve; the head also has a guard ring interposed between the cathode sleeve and the anode and a vacuum feed through arrangement in which the anode and the guard ring are held substantially concentrically within the cathode sleeve.

REFERENCES:
patent: 2137198 (1938-11-01), Smith
patent: 3244990 (1966-04-01), Herb et al.
patent: 3387175 (1968-06-01), Lloyd et al.
patent: 3441773 (1969-04-01), Roth et al.
patent: 3505554 (1970-04-01), Vekshinsky
patent: 4847564 (1989-07-01), Limp
patent: 4967157 (1990-10-01), Peacock

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