FR31437E - Lampe de t. s. f. - Google Patents

Lampe de t. s. f.

Info

Publication number: FR31437E
Authority: FR; France
Prior art keywords: lamp
Prior art date: 1925-07-07
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

Inventor

Jacques-Antoine-Mari Hawadier

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.)

FR DE LAMPES A INCANDESCENCE L

Original Assignee

FR DE LAMPES A INCANDESCENCE L

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.)

1925-07-07

Filing date

1925-07-07

Publication date

1927-03-12

1925-07-07 Application filed by FR DE LAMPES A INCANDESCENCE L filed Critical FR DE LAMPES A INCANDESCENCE L

1927-03-12 Application granted granted Critical

1927-03-12 Publication of FR31437E publication Critical patent/FR31437E/fr

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

FR31437D 1925-07-07 1925-07-07 Lampe de t. s. f. Expired FR31437E (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR31437T		1925-07-07

Publications (1)

Publication Number	Publication Date
FR31437E true FR31437E (fr)	1927-03-12

Family

ID=8669239

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR31437D Expired FR31437E (fr)	1925-07-07	1925-07-07	Lampe de t. s. f.

Country Status (1)

Country	Link
FR (1)	FR31437E (fr)

1925
- 1925-07-07 FR FR31437D patent/FR31437E/fr not_active Expired

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