GB225234A - Improvements in thermionic valves and the like - Google Patents

Improvements in thermionic valves and the like

Info

Publication number
GB225234A
GB225234A GB27961/24A GB2796124A GB225234A GB 225234 A GB225234 A GB 225234A GB 27961/24 A GB27961/24 A GB 27961/24A GB 2796124 A GB2796124 A GB 2796124A GB 225234 A GB225234 A GB 225234A
Authority
GB
United Kingdom
Prior art keywords
magnesium
cathode
bulb
thorium
electrode
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
GB27961/24A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB225234A publication Critical patent/GB225234A/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
    • H01J7/183—Composition or manufacture of getters

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Discharge Lamp (AREA)

Abstract

225,234. Compagnie GÚnÚrale de TÚlÚgraphie Sans Fils. Nov. 21, 1923, [Convention date]. Vacuum tubes.-A piece of magnesium, calcium, or zinc is attached to an electrode, such as the anode, and the bulb is exhausted and sealed, and the electrode heated by electron bombardment so as to flash the magnesium &c., which is deposited on the bulb and produces a high vacuum. The bombardment process may be short. A resistance may be connected in the high-tension circuit so as to protect the cathode during the flashing process, or several valves may be connected in series. It is suggested that magnesium &c. vapour may affect the surface of the cathode. The cathode may consist of tungsten, platinum, osmium, or tantalum, with or without thorium, uranium, cerium, zirconium, or yttrium, or their compounds ; or thorium alone may be used. Reference has been directed by the Comptroller to Specification 225,926.
GB27961/24A 1923-11-21 1924-11-21 Improvements in thermionic valves and the like Expired GB225234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR225234X 1923-11-21

Publications (1)

Publication Number Publication Date
GB225234A true GB225234A (en) 1926-02-22

Family

ID=8881908

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27961/24A Expired GB225234A (en) 1923-11-21 1924-11-21 Improvements in thermionic valves and the like

Country Status (2)

Country Link
GB (1) GB225234A (en)
NL (1) NL20091C (en)

Also Published As

Publication number Publication date
NL20091C (en)

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