GB807069A - Improvements relating to electron discharge devices - Google Patents

Improvements relating to electron discharge devices

Info

Publication number
GB807069A
GB807069A GB16206/55A GB1620655A GB807069A GB 807069 A GB807069 A GB 807069A GB 16206/55 A GB16206/55 A GB 16206/55A GB 1620655 A GB1620655 A GB 1620655A GB 807069 A GB807069 A GB 807069A
Authority
GB
United Kingdom
Prior art keywords
getter
glow
heater
translucent
improvements 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
GB16206/55A
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Publication of GB807069A publication Critical patent/GB807069A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/36—Tubes with flat electrodes, e.g. disc electrode

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Discharge Lamp (AREA)

Abstract

807,069. Thermionic valves. GENERAL ELECTRIC CO. June 6, 1955 [June 9, 1954], No. 16206/55. Class 39(1). The envelope includes a translucent ceramic member 17 through which the glow of the cathode heater 13 is visible and a getter 18 is mounted close to the member so that vapour from the getter can be deposited on the member and partly or wholly obscures the glow of the heater; thus the diminution or dissappearance of the heater glow gives an indication of the time of getter firing. The translucent ceramic may by Mgz SiO 4 of thickness 0À08 inches. The other ceramic insulating wall parts 4, 5 may also be translucent to determine whether all the getter material has been driven off from them.
GB16206/55A 1954-06-09 1955-06-06 Improvements relating to electron discharge devices Expired GB807069A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US807069XA 1954-06-09 1954-06-09

Publications (1)

Publication Number Publication Date
GB807069A true GB807069A (en) 1959-01-07

Family

ID=22159087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16206/55A Expired GB807069A (en) 1954-06-09 1955-06-06 Improvements relating to electron discharge devices

Country Status (3)

Country Link
DE (1) DE1064647B (en)
FR (2) FR1121838A (en)
GB (1) GB807069A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE906250C (en) * 1938-03-29 1954-01-28 Rca Corp Process for producing free alkaline earth metal
BE444137A (en) * 1941-04-01

Also Published As

Publication number Publication date
FR68266E (en) 1958-04-28
FR1121838A (en) 1956-08-27
DE1064647B (en) 1959-09-03

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