FR497899A - Improvements to vacuum devices - Google Patents

Improvements to vacuum devices

Info

Publication number
FR497899A
FR497899A FR497899DA FR497899A FR 497899 A FR497899 A FR 497899A FR 497899D A FR497899D A FR 497899DA FR 497899 A FR497899 A FR 497899A
Authority
FR
France
Prior art keywords
vacuum devices
vacuum
devices
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR497899A publication Critical patent/FR497899A/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
FR497899D 1918-04-11 1919-04-07 Improvements to vacuum devices Expired FR497899A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US497899XA 1918-04-11 1918-04-11

Publications (1)

Publication Number Publication Date
FR497899A true FR497899A (en) 1919-12-19

Family

ID=1533188

Family Applications (1)

Application Number Title Priority Date Filing Date
FR497899D Expired FR497899A (en) 1918-04-11 1919-04-07 Improvements to vacuum devices

Country Status (1)

Country Link
FR (1) FR497899A (en)

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