BE440566A - - Google Patents
Info
- Publication number
- BE440566A BE440566A BE440566DA BE440566A BE 440566 A BE440566 A BE 440566A BE 440566D A BE440566D A BE 440566DA BE 440566 A BE440566 A BE 440566A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
- H04R7/22—Clamping rim of diaphragm or cone against seating
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE870143X | 1940-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE440566A true BE440566A (https=) |
Family
ID=6804150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE440566D BE440566A (https=) | 1940-02-19 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE440566A (https=) |
| FR (1) | FR870143A (https=) |
-
0
- BE BE440566D patent/BE440566A/xx unknown
-
1941
- 1941-02-18 FR FR870143D patent/FR870143A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR870143A (fr) | 1942-03-03 |