GB755074A - Improvements in or relating to high vacuum pumping devices - Google Patents

Improvements in or relating to high vacuum pumping devices

Info

Publication number
GB755074A
GB755074A GB2274054A GB2274054A GB755074A GB 755074 A GB755074 A GB 755074A GB 2274054 A GB2274054 A GB 2274054A GB 2274054 A GB2274054 A GB 2274054A GB 755074 A GB755074 A GB 755074A
Authority
GB
United Kingdom
Prior art keywords
container
filament
vacuum pumping
electrode
relating
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
GB2274054A
Inventor
Daniel Alpert
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International Co
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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Priority to GB2274054A priority Critical patent/GB755074A/en
Publication of GB755074A publication Critical patent/GB755074A/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
    • 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

Abstract

755,074. High vacua obtaining. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Aug. 5, 1954, No. 22740/54. Class 8(1). A vacuum pumping device comprises a container having therein a thermionically emissive electrode 13 and an accelerating electrode 12 to effect ionization of the gas in the container and means which comprises a filament 14 for depositing evaporated material on the wall of the container. The element 13 is a filament e.g. of tungsten, and the electrode 12 is in the form of a helix. The filament 14 is of nickel or one of the known metallic getters. The helix 12 may be made positive by about 125 volts to the filament 13 and a negative potential may be applied to the container wall. The container is connected to the system 1 to be evacuated by a pipe 7. During operation portion of the tube may dip into a reservoir of liquid air.
GB2274054A 1954-08-05 1954-08-05 Improvements in or relating to high vacuum pumping devices Expired GB755074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2274054A GB755074A (en) 1954-08-05 1954-08-05 Improvements in or relating to high vacuum pumping devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2274054A GB755074A (en) 1954-08-05 1954-08-05 Improvements in or relating to high vacuum pumping devices

Publications (1)

Publication Number Publication Date
GB755074A true GB755074A (en) 1956-08-15

Family

ID=10184343

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2274054A Expired GB755074A (en) 1954-08-05 1954-08-05 Improvements in or relating to high vacuum pumping devices

Country Status (1)

Country Link
GB (1) GB755074A (en)

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