GB262069A - Means for producing high vacuum - Google Patents

Means for producing high vacuum

Info

Publication number
GB262069A
GB262069A GB26869/26A GB2686926A GB262069A GB 262069 A GB262069 A GB 262069A GB 26869/26 A GB26869/26 A GB 26869/26A GB 2686926 A GB2686926 A GB 2686926A GB 262069 A GB262069 A GB 262069A
Authority
GB
United Kingdom
Prior art keywords
calcium
tube
high vacuum
rod
producing high
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
GB26869/26A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB262069A publication Critical patent/GB262069A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J7/186—Getter supports

Landscapes

  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

262,069. British Thomson-Houston Co., Ltd., (Assignees of Ruggles, W. A.). Nov. 27, 1925, [Convention date]. Vacuum tubes.- A device for producing or maintaining a high vacuum comprises a rod 15 of an alkaline-earth metal, such as calcium. enclosed in a perforated nickel tube 10 and surrounded by a heating filament 7. The calcium is thus distilled through openings 14 in the tube on to the enclosing walls, and the metallic layer so deposited absorbs water vapour or other gas. The bulb is attached to a thermionic valve by means of the neck 3, or if desired may be used alone as a two-element rectifier by mounting the tube 10 on a separate lead-in wire 9. The calcium rod 15 is coated with magnesium to allow it to be exposed to the atmosphere for a limited period.
GB26869/26A 1925-11-27 1926-10-27 Means for producing high vacuum Expired GB262069A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US262069XA 1925-11-27 1925-11-27

Publications (1)

Publication Number Publication Date
GB262069A true GB262069A (en) 1927-06-02

Family

ID=21830475

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26869/26A Expired GB262069A (en) 1925-11-27 1926-10-27 Means for producing high vacuum

Country Status (3)

Country Link
BE (1) BE338051A (en)
FR (1) FR624574A (en)
GB (1) GB262069A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739389C (en) * 1936-01-26 1943-09-24 Siemens Ag Arrangement for the evaporation of a getter material from a tube to be heated from the outside and opening into the interior of a discharge vessel
US2850225A (en) * 1955-11-10 1958-09-02 Wisconsin Alumni Res Found Pump
WO2008099256A1 (en) 2007-02-16 2008-08-21 Saes Getters S.P.A. Air-stable alkali or alkaline-earth metal dispensers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739389C (en) * 1936-01-26 1943-09-24 Siemens Ag Arrangement for the evaporation of a getter material from a tube to be heated from the outside and opening into the interior of a discharge vessel
US2850225A (en) * 1955-11-10 1958-09-02 Wisconsin Alumni Res Found Pump
WO2008099256A1 (en) 2007-02-16 2008-08-21 Saes Getters S.P.A. Air-stable alkali or alkaline-earth metal dispensers
JP2010519017A (en) * 2007-02-16 2010-06-03 サエス ゲッターズ ソチエタ ペル アツィオニ Alkali or alkaline earth metal supply device stable in air
CN101611465B (en) * 2007-02-16 2015-04-29 工程吸气公司 Air-stable alkali or alkaline-earth metal dispensers
US10109446B2 (en) 2007-02-16 2018-10-23 Saes Getters S.P.A. Air-stable alkali or alkaline-earth metal dispensers

Also Published As

Publication number Publication date
BE338051A (en)
FR624574A (en) 1927-07-21

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