FR840253A - Agent used to improve the vacuum in thermionic valves - Google Patents

Agent used to improve the vacuum in thermionic valves

Info

Publication number
FR840253A
FR840253A FR840253DA FR840253A FR 840253 A FR840253 A FR 840253A FR 840253D A FR840253D A FR 840253DA FR 840253 A FR840253 A FR 840253A
Authority
FR
France
Prior art keywords
vacuum
improve
agent used
thermionic valves
thermionic
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
Other languages
French (fr)
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.)
Kemet Electronics Corp
Original Assignee
Kemet Laboratories Co Inc
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 Kemet Laboratories Co Inc filed Critical Kemet Laboratories Co Inc
Application granted granted Critical
Publication of FR840253A publication Critical patent/FR840253A/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)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
FR840253D 1938-02-15 1938-07-05 Agent used to improve the vacuum in thermionic valves Expired FR840253A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US190583A US2253862A (en) 1938-02-15 1938-02-15 Cleanup agents

Publications (1)

Publication Number Publication Date
FR840253A true FR840253A (en) 1939-04-21

Family

ID=22701934

Family Applications (1)

Application Number Title Priority Date Filing Date
FR840253D Expired FR840253A (en) 1938-02-15 1938-07-05 Agent used to improve the vacuum in thermionic valves

Country Status (2)

Country Link
US (1) US2253862A (en)
FR (1) FR840253A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094511A2 (en) * 1982-05-18 1983-11-23 Messer Griesheim Gmbh Getter made of finely dispersed active metals

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2844273A (en) * 1953-03-18 1958-07-22 Metal Diffusions Inc Container for articles under heat treatment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094511A2 (en) * 1982-05-18 1983-11-23 Messer Griesheim Gmbh Getter made of finely dispersed active metals
EP0094511A3 (en) * 1982-05-18 1984-10-31 Messer Griesheim Gmbh Getter made of finely dispersed active metals

Also Published As

Publication number Publication date
US2253862A (en) 1941-08-26

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