GB982406A - Improvements in or relating to ionization manometers - Google Patents
Improvements in or relating to ionization manometersInfo
- Publication number
- GB982406A GB982406A GB25237/61A GB2523761A GB982406A GB 982406 A GB982406 A GB 982406A GB 25237/61 A GB25237/61 A GB 25237/61A GB 2523761 A GB2523761 A GB 2523761A GB 982406 A GB982406 A GB 982406A
- Authority
- GB
- United Kingdom
- Prior art keywords
- collector
- anode
- wire
- voltage
- stretched
- 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
- H01J41/04—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of thermionic 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)
- Measurement Of Radiation (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
982,406. Ionization manometers. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. July 12, 1961 [July 15, 1960], No. 25237/61. Heading H1D. An ionization manometer comprises an ioncollector wire 11 stretched within a helical wire anode 7 on the outer side of which a filament cathode 5 is arranged, the diameter of the collector wire 11 being less than 10 microns. The circuit provides in operation an anodecathode voltage of not more than one fifth the anode-collector voltage. The anode and collector voltages are preferably chosen so that the collector current tends to become independent of the anode-collector voltage, which is preferably less than 500V, the collector being earthed, and the anode-cathode voltage being stabilized. As shown, the V-shaped filament 5 is stretched between three leads 4 and the end turns of the helical wire anode are progressively reduced to counteract the escape of ions. The tungsten wire collector has a diameter of 4Á and is stretched by a spring 10, glass tubes 16 shielding the connections to leads 9. The envelope has a conductive tin-oxide coating 15 which may be directly connected to the cathode. Electrode dimensions are given. Anode and collector voltages of + 55V and - 250V respectively result in low X-ray emission and enable pressures down to about 10<SP>-13</SP> mm. to be measured.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL253877 | 1960-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB982406A true GB982406A (en) | 1965-02-03 |
Family
ID=19752472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25237/61A Expired GB982406A (en) | 1960-07-15 | 1961-07-12 | Improvements in or relating to ionization manometers |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3253183A (en) |
| CH (1) | CH408452A (en) |
| DE (1) | DE1151680B (en) |
| GB (1) | GB982406A (en) |
| NL (2) | NL113459C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1252591A (en) * | 1968-02-12 | 1971-11-10 | ||
| US4314205A (en) * | 1979-11-19 | 1982-02-02 | Paitich Ronald M | Method and means for vacuum gauging |
| WO1998050768A1 (en) | 1997-05-09 | 1998-11-12 | The Fredericks Company | Bayard-alpert vacuum gauge with neutralization of x-ray effect |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2605431A (en) * | 1950-03-30 | 1952-07-29 | Westinghouse Electric Corp | Ionization vacuum gauge |
| NL179125B (en) * | 1953-06-15 | Degussa | PROCESS FOR DESULFURIZING ACTIVE CARBON CONTAINING SULFIDIC SULFUR. | |
| US2848635A (en) * | 1954-11-16 | 1958-08-19 | Vacuum Electronic Engineering | Ionization gauges |
| US2972690A (en) * | 1959-07-28 | 1961-02-21 | Nat Company Inc | Ion pump and gauge |
-
0
- NL NL253877D patent/NL253877A/xx unknown
- NL NL113459D patent/NL113459C/xx active
-
1961
- 1961-06-08 US US115772A patent/US3253183A/en not_active Expired - Lifetime
- 1961-07-12 DE DEN20335A patent/DE1151680B/en active Pending
- 1961-07-12 GB GB25237/61A patent/GB982406A/en not_active Expired
- 1961-07-12 CH CH821961A patent/CH408452A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH408452A (en) | 1966-02-28 |
| DE1151680B (en) | 1963-07-18 |
| NL253877A (en) | |
| NL113459C (en) | |
| US3253183A (en) | 1966-05-24 |
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