FR720497A - Dispositif de contrôle pour lampes à cathodes incandescentes - Google Patents

Dispositif de contrôle pour lampes à cathodes incandescentes

Info

Publication number: FR720497A
Authority: FR; France
Prior art keywords: control device; cathode lamps; incandescent cathode; incandescent; lamps
Prior art date: 1930-07-21
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

Hans Vogt

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.)

1930-07-21

Filing date

1931-07-21

Publication date

1932-02-19

1931-07-21 Application filed filed Critical

1932-02-19 Application granted granted Critical

1932-02-19 Publication of FR720497A publication Critical patent/FR720497A/fr

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
- H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
- H03F1/544—Protection of filaments

Landscapes

Engineering & Computer Science (AREA)
Power Engineering (AREA)

FR720497D 1930-07-21 1931-07-21 Dispositif de contrôle pour lampes à cathodes incandescentes Expired FR720497A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE720497X		1930-07-21

Publications (1)

Publication Number	Publication Date
FR720497A true FR720497A (fr)	1932-02-19

Family

ID=6628131

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR720497D Expired FR720497A (fr)	1930-07-21	1931-07-21	Dispositif de contrôle pour lampes à cathodes incandescentes

Country Status (1)

Country	Link
FR (1)	FR720497A (fr)

1931
- 1931-07-21 FR FR720497D patent/FR720497A/fr not_active Expired

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