FR627784A - Perfectionnement aux ampoules à émission cathodique - Google Patents

Perfectionnement aux ampoules à émission cathodique

Info

Publication number
FR627784A
FR627784A FR627784DA FR627784A FR 627784 A FR627784 A FR 627784A FR 627784D A FR627784D A FR 627784DA FR 627784 A FR627784 A FR 627784A
Authority
FR
France
Prior art keywords
improvement
bulbs
cathodic emission
cathodic
emission bulbs
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
English (en)
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.)
METRUM
Original Assignee
METRUM
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 METRUM filed Critical METRUM
Application granted granted Critical
Publication of FR627784A publication Critical patent/FR627784A/fr
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
FR627784D 1926-12-31 1927-01-19 Perfectionnement aux ampoules à émission cathodique Expired FR627784A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH627784X 1926-12-31

Publications (1)

Publication Number Publication Date
FR627784A true FR627784A (fr) 1927-10-12

Family

ID=4524520

Family Applications (1)

Application Number Title Priority Date Filing Date
FR627784D Expired FR627784A (fr) 1926-12-31 1927-01-19 Perfectionnement aux ampoules à émission cathodique

Country Status (1)

Country Link
FR (1) FR627784A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556254A (en) * 1947-05-15 1951-06-12 Rca Corp Voltage reference tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556254A (en) * 1947-05-15 1951-06-12 Rca Corp Voltage reference tube

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