FR659604A - Membrane for loudspeaker or similar device - Google Patents
Membrane for loudspeaker or similar deviceInfo
- Publication number
- FR659604A FR659604A FR659604DA FR659604A FR 659604 A FR659604 A FR 659604A FR 659604D A FR659604D A FR 659604DA FR 659604 A FR659604 A FR 659604A
- Authority
- FR
- France
- Prior art keywords
- loudspeaker
- membrane
- similar device
- similar
- Prior art date
- 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
Links
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
- H04R7/122—Non-planar diaphragms or cones 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW79281D DE557366C (en) | 1928-05-05 | 1928-05-05 | speaker |
Publications (1)
Publication Number | Publication Date |
---|---|
FR659604A true FR659604A (en) | 1929-07-03 |
Family
ID=10155069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR659604D Expired FR659604A (en) | 1928-05-05 | 1928-08-28 | Membrane for loudspeaker or similar device |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE358783A (en) |
DE (1) | DE557366C (en) |
FR (1) | FR659604A (en) |
GB (1) | GB314691A (en) |
NL (1) | NL27769C (en) |
-
0
- NL NL27769D patent/NL27769C/xx active
- BE BE358783D patent/BE358783A/xx unknown
-
1928
- 1928-05-05 DE DEW79281D patent/DE557366C/en not_active Expired
- 1928-07-19 GB GB2097828A patent/GB314691A/en not_active Expired
- 1928-08-28 FR FR659604D patent/FR659604A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL27769C (en) | |
DE557366C (en) | 1932-08-22 |
BE358783A (en) | |
GB314691A (en) | 1929-07-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR675338A (en) | Acoustic device | |
FR711667A (en) | Electro-acoustic delay device | |
FR701793A (en) | Handling device | |
FR659604A (en) | Membrane for loudspeaker or similar device | |
FR675457A (en) | Device for adjusting rockets | |
FR665245A (en) | Formwork device | |
FR664355A (en) | Telecurietherapy device | |
FR650372A (en) | Device for drawing | |
FR31695E (en) | Mirror-signaling device | |
FR690133A (en) | Orthophone device for sound emissions | |
FR680855A (en) | Electromagnet-operated sound-producing device | |
FR623308A (en) | Scaffolding grafting device | |
FR625311A (en) | Stroboscopy device | |
CH138525A (en) | Device for massages. | |
FR705870A (en) | Device for drawing letters | |
FR652984A (en) | Projector device | |
FR618409A (en) | Diffuser for carburetor or similar devices | |
FR646991A (en) | Device for mechanical plowing | |
FR668626A (en) | Culture device | |
FR618265A (en) | Microphone advertising device | |
FR650274A (en) | Device for inhalations | |
FR609011A (en) | Mirror-signaling device | |
FR623629A (en) | Mimeograph device | |
FR621010A (en) | Advertising device | |
FR627738A (en) | Weighing device |