NL18435C - - Google Patents
Info
- Publication number
- NL18435C NL18435C NL30507A NL30507A NL18435C NL 18435 C NL18435 C NL 18435C NL 30507 A NL30507 A NL 30507A NL 30507 A NL30507 A NL 30507A NL 18435 C NL18435 C NL 18435C
- Authority
- NL
- Netherlands
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
-
- 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
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms 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 |
|---|---|---|---|
| US729009A US1913451A (en) | 1924-07-30 | 1924-07-30 | Acoustic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL18435C true NL18435C (en) | 1928-08-15 |
Family
ID=24929199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL30507A NL18435C (en) | 1924-07-30 | 1925-06-17 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1913451A (en) |
| DE (1) | DE556082C (en) |
| FR (1) | FR600923A (en) |
| GB (1) | GB237878A (en) |
| NL (1) | NL18435C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2662606A (en) * | 1950-01-31 | 1953-12-15 | Rca Corp | Elliptical conoidal sound reproducing diaphragm |
-
1924
- 1924-07-30 US US729009A patent/US1913451A/en not_active Expired - Lifetime
-
1925
- 1925-06-10 GB GB15131/25A patent/GB237878A/en not_active Expired
- 1925-06-17 NL NL30507A patent/NL18435C/xx active
- 1925-06-28 DE DEI26337D patent/DE556082C/en not_active Expired
- 1925-07-20 FR FR600923D patent/FR600923A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE556082C (en) | 1932-08-04 |
| GB237878A (en) | 1926-07-22 |
| FR600923A (en) | 1926-02-18 |
| US1913451A (en) | 1933-06-13 |