FR37837E - Perfectionnements aux systèmes amplificateurs - Google Patents

Perfectionnements aux systèmes amplificateurs

Info

Publication number: FR37837E
Authority: FR; France
Prior art keywords: amplifier systems; amplifier; systems
Prior art date: 1925-03-03
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

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.)

1925-03-03

Filing date

1929-09-24

Publication date

1931-01-24

1925-03-03 Priority claimed from US12977A external-priority patent/US1728879A/en

1925-11-14 Priority claimed from US69201A external-priority patent/US1778058A/en

1925-11-14 Priority claimed from US69200A external-priority patent/US1640436A/en

1926-02-13 Priority claimed from US88161A external-priority patent/US1774467A/en

1926-05-13 Priority claimed from US108941A external-priority patent/US1665883A/en

1926-08-21 Priority claimed from GB2067926A external-priority patent/GB279202A/en

1927-06-01 Priority claimed from US195792A external-priority patent/US1833750A/en

1927-06-01 Priority claimed from US195793A external-priority patent/US1701374A/en

1927-10-15 Priority claimed from GB2741627A external-priority patent/GB304167A/en

1928-04-21 Priority claimed from US271813A external-priority patent/US1906615A/en

1928-05-10 Priority claimed from US276742A external-priority patent/US1833762A/en

1928-08-31 Priority claimed from US303207A external-priority patent/US1756860A/en

1928-09-26 Priority claimed from US308478A external-priority patent/US1814817A/en

1929-09-24 Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA

1931-01-24 Publication of FR37837E publication Critical patent/FR37837E/fr

1931-01-24 Application granted granted Critical

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Electromagnetism (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Power Engineering (AREA)

FR37837D 1925-03-03 1929-09-24 Perfectionnements aux systèmes amplificateurs Expired FR37837E (fr)

Applications Claiming Priority (18)

Application Number	Priority Date	Filing Date	Title
US12977A US1728879A (en)	1925-03-03	1925-03-03	Amplifying system
US69200A US1640436A (en)	1925-11-14	1925-11-14	Amplifying system
US69201A US1778058A (en)	1925-11-14	1925-11-14	Amplifying system
US88161A US1774467A (en)	1926-02-13	1926-02-13	Power-supply system
US108941A US1665883A (en)	1926-05-13	1926-05-13	Power-amplifying system
GB2067926A GB279202A (en)	1926-08-21	1926-08-21	Improvements relating to thermionic valve amplifier circuits
US195792A US1833750A (en)	1927-06-01	1927-06-01	Electrical apparatus
US195793A US1701374A (en)	1927-06-01	1927-06-01	Electrical apparatus
US35771XA	1927-07-22	1927-07-22
GB2741627A GB304167A (en)	1927-10-15	1927-10-15	Improvements in arrangements for supplying current for the operation of thermionic valve systems
FR34843T		1927-12-31
US37327XA	1928-02-11	1928-02-11
GB502528		1928-02-17
US271813A US1906615A (en)	1928-04-21	1928-04-21	Electric pick-up
US276742A US1833762A (en)	1928-05-10	1928-05-10	Sound amplifier and reproducing apparatus
GB37832X		1928-06-11
US303207A US1756860A (en)	1928-08-31	1928-08-31	Apparatus for producing sound
US308478A US1814817A (en)	1928-09-26	1928-09-26	Protective means for sound reproducers

Publications (1)

Publication Number	Publication Date
FR37837E true FR37837E (fr)	1931-01-24

Family

ID=27586081

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR37837D Expired FR37837E (fr)	1925-03-03	1929-09-24	Perfectionnements aux systèmes amplificateurs

Country Status (1)

Country	Link
FR (1)	FR37837E (fr)

1929
- 1929-09-24 FR FR37837D patent/FR37837E/fr not_active Expired

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