GB978775A - Ultra high vacuum cold cathode ionization gauge - Google Patents
Ultra high vacuum cold cathode ionization gaugeInfo
- Publication number
- GB978775A GB978775A GB4540162A GB4540162A GB978775A GB 978775 A GB978775 A GB 978775A GB 4540162 A GB4540162 A GB 4540162A GB 4540162 A GB4540162 A GB 4540162A GB 978775 A GB978775 A GB 978775A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- anode
- envelope
- cold cathode
- ionization gauge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
- H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
- H01J41/06—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of cold cathodes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L21/00—Vacuum gauges
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
978,775. Ionization manometers. GEOPHYSICS CORPORATION OF AMERICA. Nov. 30, 1962 [Dec. 6, 1961], No. 45401/62. Heading H1D. A cold cathode ionization gauge has a metal envelope, a cylindrical anode disposed within the envelope, a cathode concentrically arranged within the anode, and means for applying a unidirectional magnetic field along the anode - cathode axis, wherein the cathode has conical portions which are slanted relatively to the direction of the magnetic field. As shown, the spoolshaped cathode 30 is supported by two axially disposed insulating spheres 40, 42 which are seated on recesses 66, 70 and 36, 41 provided in the envelope and cathode respectively. The anode is similarly supported by insulating spheres which are seated in four holes, e.g. 12, 18 provided in the cylindrical anode. Leads 79, 86 are connected to the cathode and anode respectively. Rings 51, 53 are preferably provided in close proximity to the ends of the cathode and assist to initiate the cold cathode discharge. The envelope may be made of iron of a low permeability, thereby forming part of a magnetic circuit which has a minimum magnetic air gap.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15737261A | 1961-12-06 | 1961-12-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB978775A true GB978775A (en) | 1964-12-23 |
Family
ID=22563440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4540162A Expired GB978775A (en) | 1961-12-06 | 1963-11-30 | Ultra high vacuum cold cathode ionization gauge |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1473445B2 (en) |
GB (1) | GB978775A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1698878A1 (en) * | 2005-03-04 | 2006-09-06 | Inficon GmbH | Electrode configuration and pressure measuring apparatus |
US7768267B2 (en) | 2007-07-11 | 2010-08-03 | Brooks Automation, Inc. | Ionization gauge with a cold electron source |
-
1962
- 1962-12-03 DE DE19621473445 patent/DE1473445B2/en active Pending
-
1963
- 1963-11-30 GB GB4540162A patent/GB978775A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1698878A1 (en) * | 2005-03-04 | 2006-09-06 | Inficon GmbH | Electrode configuration and pressure measuring apparatus |
WO2006094687A1 (en) * | 2005-03-04 | 2006-09-14 | Inficon Gmbh | Vacuum measuring gauge |
US7352187B2 (en) | 2005-03-04 | 2008-04-01 | Inficon Gmbh | Vacuum measuring gauge |
US7768267B2 (en) | 2007-07-11 | 2010-08-03 | Brooks Automation, Inc. | Ionization gauge with a cold electron source |
Also Published As
Publication number | Publication date |
---|---|
DE1473445A1 (en) | 1969-01-09 |
DE1473445B2 (en) | 1970-06-25 |
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