FR29525E - Perfectionnements aux dispositifs acoustiques - Google Patents

Perfectionnements aux dispositifs acoustiques

Info

Publication number: FR29525E
Authority: FR; France
Prior art keywords: acoustic devices; acoustic; devices
Prior art date: 1923-11-30
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.)

1923-11-30

Filing date

1924-10-09

Publication date

1925-08-22

1924-10-09 Application filed by Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF

1925-08-22 Application granted granted Critical

1925-08-22 Publication of FR29525E publication Critical patent/FR29525E/fr

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
- H04R11/00—Transducers of moving-armature or moving-core type
- 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
- H04R7/16—Mounting or tensioning of diaphragms or cones

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Multimedia (AREA)
Electromagnetism (AREA)
Diaphragms For Electromechanical Transducers (AREA)
Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Soundproofing, Sound Blocking, And Sound Damping (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

FR29525D 1923-11-30 1924-10-09 Perfectionnements aux dispositifs acoustiques Expired FR29525E (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB5577/25A GB231798A (en)	1923-11-30	1923-11-30	Improvements in acoustic devices

Publications (1)

Publication Number	Publication Date
FR29525E true FR29525E (fr)	1925-08-22

Family

ID=9798721

Family Applications (3)

Application Number	Title	Priority Date	Filing Date
FR577680D Expired FR577680A (fr)	1923-11-30	1924-02-22	Perfectionnements aux dispositifs acoustiques
FR29525D Expired FR29525E (fr)	1923-11-30	1924-10-09	Perfectionnements aux dispositifs acoustiques
FR29528D Expired FR29528E (fr)	1923-11-30	1924-10-10	Perfectionnements aux dispositifs acoustiques

Family Applications Before (1)

Application Number	Title	Priority Date	Filing Date
FR577680D Expired FR577680A (fr)	1923-11-30	1924-02-22	Perfectionnements aux dispositifs acoustiques

Family Applications After (1)

Application Number	Title	Priority Date	Filing Date
FR29528D Expired FR29528E (fr)	1923-11-30	1924-10-10	Perfectionnements aux dispositifs acoustiques

Country Status (6)

Country	Link
US (2)	US1778308A (fr)
CH (1)	CH109921A (fr)
DE (2)	DE533263C (fr)
FR (3)	FR577680A (fr)
GB (2)	GB231798A (fr)
NL (1)	NL25188C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE969535C (de) *	1942-04-14	1958-06-12	Siemens Ag	Schwingsystem mit aus Polyvinylchloridfolie bestehender Membran
US2826259A (en) *	1952-08-04	1958-03-11	Arthur W Page	Concussion protection for loudspeakers
GB2359440A (en) *	2000-02-17	2001-08-22	Goodmans Loudspeakers Ltd	Stiffening flange for a conical loudspeaker diaphragm

1923
- 1923-11-30 GB GB5577/25A patent/GB231798A/en not_active Expired
- 1923-12-18 NL NL25842A patent/NL25188C/xx active
1924
- 1924-01-12 CH CH109921D patent/CH109921A/de unknown
- 1924-02-05 US US690803A patent/US1778308A/en not_active Expired - Lifetime
- 1924-02-05 US US690695A patent/US1926888A/en not_active Expired - Lifetime
- 1924-02-22 FR FR577680D patent/FR577680A/fr not_active Expired
- 1924-08-09 GB GB18956/24A patent/GB240596A/en not_active Expired
- 1924-08-16 DE DEI25060D patent/DE533263C/de not_active Expired
- 1924-08-21 DE DEI25076D patent/DE517737C/de not_active Expired
- 1924-10-09 FR FR29525D patent/FR29525E/fr not_active Expired
- 1924-10-10 FR FR29528D patent/FR29528E/fr not_active Expired

Also Published As

Publication number	Publication date
CH109921A (de)	1925-05-01
GB231798A (en)	1925-03-30
US1778308A (en)	1930-10-14
DE533263C (de)	1931-09-10
FR29528E (fr)	1925-08-22
NL25188C (fr)	1931-10-15
GB240596A (en)	1925-10-08
FR577680A (fr)	1924-08-09
US1926888A (en)	1933-09-12
DE517737C (de)	1931-02-09

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