NL37811C - - Google Patents
Info
- Publication number
- NL37811C NL37811C NL37811DA NL37811C NL 37811 C NL37811 C NL 37811C NL 37811D A NL37811D A NL 37811DA NL 37811 C NL37811 C NL 37811C
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
-
- 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
- H04R7/02—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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1961149X | 1931-07-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL37811C true NL37811C (https=) |
Family
ID=7789178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL37811D NL37811C (https=) | 1931-07-18 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1961149A (https=) |
| FR (1) | FR739997A (https=) |
| NL (1) | NL37811C (https=) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3033944A (en) * | 1957-12-31 | 1962-05-08 | Automatic Elect Lab | Magnetostrictive transducer |
| FR2854021B1 (fr) * | 2003-04-16 | 2006-03-31 | Focal Jmlab | Transducteur acoustiques en beryllium pur a radiation directe, a membrane de forme concave, pour applications audio notamment pour enceintes acoustiques |
-
0
- NL NL37811D patent/NL37811C/xx active
-
1932
- 1932-07-15 FR FR739997D patent/FR739997A/fr not_active Expired
- 1932-07-15 US US622626A patent/US1961149A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR739997A (fr) | 1933-01-19 |
| US1961149A (en) | 1934-06-05 |