FR600923A - Improvements in loudspeaker construction - Google Patents

Improvements in loudspeaker construction

Info

Publication number: FR600923A
Authority: FR; France
Prior art keywords: loudspeaker construction; loudspeaker; construction
Prior art date: 1924-07-30
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.)

Thales SA

Original Assignee

Le Materiel Telephonique Thomson CSF

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.)

1924-07-30

Filing date

1925-07-20

Publication date

1926-02-18

1925-07-20 Application filed by Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF

1926-02-18 Application granted granted Critical

1926-02-18 Publication of FR600923A publication Critical patent/FR600923A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Diaphragms For Electromechanical Transducers (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

FR600923D 1924-07-30 1925-07-20 Improvements in loudspeaker construction Expired FR600923A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US729009A US1913451A (en)	1924-07-30	1924-07-30	Acoustic apparatus

Publications (1)

Publication Number	Publication Date
FR600923A true FR600923A (en)	1926-02-18

Family

ID=24929199

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR600923D Expired FR600923A (en)	1924-07-30	1925-07-20	Improvements in loudspeaker construction

Country Status (5)

Country	Link
US (1)	US1913451A (en)
DE (1)	DE556082C (en)
FR (1)	FR600923A (en)
GB (1)	GB237878A (en)
NL (1)	NL18435C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2662606A (en) *	1950-01-31	1953-12-15	Rca Corp	Elliptical conoidal sound reproducing diaphragm

1924
- 1924-07-30 US US729009A patent/US1913451A/en not_active Expired - Lifetime
1925
- 1925-06-10 GB GB15131/25A patent/GB237878A/en not_active Expired
- 1925-06-17 NL NL30507A patent/NL18435C/xx active
- 1925-06-28 DE DEI26337D patent/DE556082C/en not_active Expired
- 1925-07-20 FR FR600923D patent/FR600923A/en not_active Expired

Also Published As

Publication number	Publication date
US1913451A (en)	1933-06-13
NL18435C (en)	1928-08-15
DE556082C (en)	1932-08-04
GB237878A (en)	1926-07-22

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