BE352291A - - Google Patents
Info
- Publication number
- BE352291A BE352291A BE352291DA BE352291A BE 352291 A BE352291 A BE 352291A BE 352291D A BE352291D A BE 352291DA BE 352291 A BE352291 A BE 352291A
- Authority
- BE
- Belgium
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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US212944A US1672796A (en) | 1927-08-15 | 1927-08-15 | Sound reproducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE352291A true BE352291A (fr) |
Family
ID=22793058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE352291D BE352291A (fr) | 1927-08-15 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1672796A (fr) |
| BE (1) | BE352291A (fr) |
| FR (1) | FR657396A (fr) |
| GB (1) | GB295625A (fr) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2519322A (en) * | 1947-03-06 | 1950-08-15 | Stewart A Downs | Molasses dispenser for cattle |
| US2837340A (en) * | 1952-04-07 | 1958-06-03 | Golda A Duncan | Mechanical sound reproducing device |
| US2853146A (en) * | 1955-02-07 | 1958-09-23 | George A Coates | Transmitter with vibratile air coupling |
| US3985201A (en) * | 1974-10-24 | 1976-10-12 | Kloster Glenn R | Infinite sound reproduction chamber |
| US4039044A (en) * | 1974-11-25 | 1977-08-02 | Oskar Heil | Low frequency electro-acoustic transducer with interconnected diaphragms interleaved with fixed diaphragms |
| US5198624A (en) * | 1988-02-10 | 1993-03-30 | Linaeum Corporation | Audio transducer with controlled flexibility diaphragm |
| US4903308A (en) * | 1988-02-10 | 1990-02-20 | Linaeum Corporation | Audio transducer with controlled flexibility diaphragm |
| US6061461A (en) * | 1998-05-08 | 2000-05-09 | Paddock; Paul W. | Audio transducer |
-
0
- BE BE352291D patent/BE352291A/xx unknown
-
1927
- 1927-08-15 US US212944A patent/US1672796A/en not_active Expired - Lifetime
-
1928
- 1928-05-29 GB GB15688/28A patent/GB295625A/en not_active Expired
- 1928-06-15 FR FR657396D patent/FR657396A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB295625A (en) | 1929-08-29 |
| US1672796A (en) | 1928-06-05 |
| FR657396A (fr) | 1929-05-22 |