FR731818A - Inductor system for electro-acoustic devices, such as loudspeakers and other similar devices, provided with a permanent magnet - Google Patents

Inductor system for electro-acoustic devices, such as loudspeakers and other similar devices, provided with a permanent magnet

Info

Publication number: FR731818A
Authority: FR; France
Prior art keywords: devices; loudspeakers; electro; permanent magnet; inductor system
Prior art date: 1931-06-10
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

French (fr)

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.)

Koninklijke Philips NV

Original Assignee

Philips Gloeilampenfabrieken NV

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.)

1931-06-10

Filing date

1932-02-25

Publication date

1932-09-08

1932-02-25 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1932-09-08 Application granted granted Critical

1932-09-08 Publication of FR731818A publication Critical patent/FR731818A/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
- H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

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

FR731818D 1931-06-10 1932-02-25 Inductor system for electro-acoustic devices, such as loudspeakers and other similar devices, provided with a permanent magnet Expired FR731818A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL382514X		1931-06-10

Publications (1)

Publication Number	Publication Date
FR731818A true FR731818A (en)	1932-09-08

Family

ID=19785666

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR731818D Expired FR731818A (en)	1931-06-10	1932-02-25	Inductor system for electro-acoustic devices, such as loudspeakers and other similar devices, provided with a permanent magnet

Country Status (3)

Country	Link
BE (1)	BE386663A (en)
FR (1)	FR731818A (en)
GB (1)	GB382514A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2427571A (en) *		1947-09-16		Magnetic structure for electrical
DE10119984A1 (en) *	2001-04-24	2002-10-31	Bosch Gmbh Robert	Fuel injection device for an internal combustion engine

0
- BE BE386663D patent/BE386663A/xx unknown
1932
- 1932-02-25 FR FR731818D patent/FR731818A/en not_active Expired
- 1932-03-01 GB GB6215/32A patent/GB382514A/en not_active Expired

Also Published As

Publication number	Publication date
BE386663A (en)
GB382514A (en)	1932-10-27

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