NL18673C - - Google Patents
Info
- Publication number
- NL18673C NL18673C NL18673DA NL18673C NL 18673 C NL18673 C NL 18673C NL 18673D A NL18673D A NL 18673DA NL 18673 C NL18673 C NL 18673C
- 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
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
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 |
|---|---|---|---|
| NL1802910X | 1926-05-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL18673C true NL18673C (fr) |
Family
ID=19873123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL18673D NL18673C (fr) | 1926-05-14 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1802910A (fr) |
| BE (1) | BE341622A (fr) |
| DE (1) | DE502053C (fr) |
| FR (1) | FR633364A (fr) |
| NL (1) | NL18673C (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2681390A (en) * | 1951-01-23 | 1954-06-15 | Rola Company Inc | Diaphragm for loud speakers |
| US4562899A (en) * | 1982-06-16 | 1986-01-07 | Nippon Gakki Seizo Kabushiki Kaisha | Diaphragm of electroacoustic transducer and method of manufacturing the same |
-
0
- NL NL18673D patent/NL18673C/xx active
- BE BE341622D patent/BE341622A/xx unknown
-
1927
- 1927-04-26 DE DEN27222D patent/DE502053C/de not_active Expired
- 1927-04-26 FR FR633364D patent/FR633364A/fr not_active Expired
- 1927-05-02 US US188077A patent/US1802910A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1802910A (en) | 1931-04-28 |
| DE502053C (de) | 1930-07-08 |
| BE341622A (fr) | |
| FR633364A (fr) | 1928-01-27 |