GB1159333A - Improvements in and relating to Pumping Devices for Producing and Maintaining a Vacuum - Google Patents
Improvements in and relating to Pumping Devices for Producing and Maintaining a VacuumInfo
- Publication number
- GB1159333A GB1159333A GB416167A GB416167A GB1159333A GB 1159333 A GB1159333 A GB 1159333A GB 416167 A GB416167 A GB 416167A GB 416167 A GB416167 A GB 416167A GB 1159333 A GB1159333 A GB 1159333A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- vacuum
- wires
- cooling
- heating
- 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
- H01J41/12—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
-
- 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
- H01J41/12—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
- H01J41/14—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps with ionisation by means of thermionic cathodes
- H01J41/16—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps with ionisation by means of thermionic cathodes using gettering substances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
- H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
- H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
1,159,333. Producing a vacuum. SOC. GENERALE DU VIDE. Jan. 27, 1967 [Jan. 28. 1966], No.4161/67. Heading F1N. A vacuum pumping device comprises a bellshaped vessel 1 evacuated initially by conventional pumps P, S mounted on a base-plate 2 and maintained evacuated by a gas absorptive assembly disposed within the vessel and surrounding a working zone 17 of the device, the absorptive assembly comprising a double-wall 18 cooled to below -170‹ C., wires 22 of a metal vaporizing at elevated temperature and screens 23 of, e. g., molybdenum, partially enclosing the wires. Cooling of the double-wall 18 is by liquid nitrogen supplied to the space between the walls through a pipe 19. The wires 22 are preferably of titanium and each is connected in series with its screen 23 so as to be heated by electrical current supplied through conductors 24, 25. Heating elements 15 and cooling pipes 16 are disposed on the outside of the vessel 1. The initial vacuum is produced by the sorption pump 5 followed by heating of the vessel using the elements 15 with, if necessary, other heating means. After cooling the vessel, the ionic pump(s) P is or are started. The vacuum is thereafter maintained by cooling the double-wall and heating the wires 22 and screens 23.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR47568A FR1478404A (en) | 1966-01-28 | 1966-01-28 | Improvements to pumping devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1159333A true GB1159333A (en) | 1969-07-23 |
Family
ID=8599969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB416167A Expired GB1159333A (en) | 1966-01-28 | 1967-01-27 | Improvements in and relating to Pumping Devices for Producing and Maintaining a Vacuum |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE693018A (en) |
DE (1) | DE1628447A1 (en) |
FR (1) | FR1478404A (en) |
GB (1) | GB1159333A (en) |
NL (1) | NL6701312A (en) |
-
1966
- 1966-01-28 FR FR47568A patent/FR1478404A/en not_active Expired
-
1967
- 1967-01-23 BE BE693018D patent/BE693018A/xx unknown
- 1967-01-27 GB GB416167A patent/GB1159333A/en not_active Expired
- 1967-01-27 DE DE19671628447 patent/DE1628447A1/en active Pending
- 1967-01-27 NL NL6701312A patent/NL6701312A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
FR1478404A (en) | 1967-04-28 |
BE693018A (en) | 1967-07-24 |
NL6701312A (en) | 1967-07-31 |
DE1628447A1 (en) | 1971-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |