GB289975A - Improvements in or relating to electric vacuum or gas-filled tubes - Google Patents

Improvements in or relating to electric vacuum or gas-filled tubes

Info

Publication number
GB289975A
GB289975A GB368927A GB368927A GB289975A GB 289975 A GB289975 A GB 289975A GB 368927 A GB368927 A GB 368927A GB 368927 A GB368927 A GB 368927A GB 289975 A GB289975 A GB 289975A
Authority
GB
United Kingdom
Prior art keywords
helix
relating
gas
electric vacuum
filled tubes
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
GB368927A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to GB368927A priority Critical patent/GB289975A/en
Priority to FR642557D priority patent/FR642557A/en
Publication of GB289975A publication Critical patent/GB289975A/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

  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

289,975. Wade. H., (Naamlooze Vennootschap Philips Gloeilampenfabrieken). Feb. 9, 1927. Vacuum tubes.-In order to prevent the deposition of a getter, such as calcium or other electropositive metal, on the electrodes, a screen 14 is interposed between the electrodes and a member, such as a tungsten helix 11, containing or coated with the metal which is evolved when the helix is heated, the helix not acting as a cathode. One end of the helix is connected with one of the supports 5 for the anode, not shown, and the other end with a separate leading in wire. In a modification, calcium &c. is heated by a filament wound around it.
GB368927A 1927-02-09 1927-02-09 Improvements in or relating to electric vacuum or gas-filled tubes Expired GB289975A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB368927A GB289975A (en) 1927-02-09 1927-02-09 Improvements in or relating to electric vacuum or gas-filled tubes
FR642557D FR642557A (en) 1927-02-09 1927-10-18 Electric discharge tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB368927A GB289975A (en) 1927-02-09 1927-02-09 Improvements in or relating to electric vacuum or gas-filled tubes

Publications (1)

Publication Number Publication Date
GB289975A true GB289975A (en) 1928-05-09

Family

ID=9763079

Family Applications (1)

Application Number Title Priority Date Filing Date
GB368927A Expired GB289975A (en) 1927-02-09 1927-02-09 Improvements in or relating to electric vacuum or gas-filled tubes

Country Status (2)

Country Link
FR (1) FR642557A (en)
GB (1) GB289975A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744498C (en) * 1937-11-27 1944-01-19 Rca Corp Process for the production of free alkaline earth metal in discharge tubes and arrangement for carrying out the process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744498C (en) * 1937-11-27 1944-01-19 Rca Corp Process for the production of free alkaline earth metal in discharge tubes and arrangement for carrying out the process

Also Published As

Publication number Publication date
FR642557A (en) 1928-08-31

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