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 Vacuum

Info

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
Application number
GB416167A
Inventor
Marcel Matricon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GENERALE DU VIDE Ste
Original Assignee
GENERALE DU VIDE Ste
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GENERALE DU VIDE Ste filed Critical GENERALE DU VIDE Ste
Publication of GB1159333A publication Critical patent/GB1159333A/en
Expired legal-status Critical Current

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.
GB416167A 1966-01-28 1967-01-27 Improvements in and relating to Pumping Devices for Producing and Maintaining a Vacuum Expired GB1159333A (en)

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)

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