NL25188C - - Google Patents
Info
- Publication number
- NL25188C NL25188C NL25842A NL25842A NL25188C NL 25188 C NL25188 C NL 25188C NL 25842 A NL25842 A NL 25842A NL 25842 A NL25842 A NL 25842A NL 25188 C NL25188 C NL 25188C
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Electromagnetism (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5577/25A GB231798A (en) | 1923-11-30 | 1923-11-30 | Improvements in acoustic devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL25188C true NL25188C (fr) | 1931-10-15 |
Family
ID=9798721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL25842A NL25188C (fr) | 1923-11-30 | 1923-12-18 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US1778308A (fr) |
| CH (1) | CH109921A (fr) |
| DE (2) | DE533263C (fr) |
| FR (3) | FR577680A (fr) |
| GB (2) | GB231798A (fr) |
| NL (1) | NL25188C (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE969535C (de) * | 1942-04-14 | 1958-06-12 | Siemens Ag | Schwingsystem mit aus Polyvinylchloridfolie bestehender Membran |
| US2826259A (en) * | 1952-08-04 | 1958-03-11 | Arthur W Page | Concussion protection for loudspeakers |
| GB2359440A (en) * | 2000-02-17 | 2001-08-22 | Goodmans Loudspeakers Ltd | Stiffening flange for a conical loudspeaker diaphragm |
-
1923
- 1923-11-30 GB GB5577/25A patent/GB231798A/en not_active Expired
- 1923-12-18 NL NL25842A patent/NL25188C/xx active
-
1924
- 1924-01-12 CH CH109921D patent/CH109921A/de unknown
- 1924-02-05 US US690803A patent/US1778308A/en not_active Expired - Lifetime
- 1924-02-05 US US690695A patent/US1926888A/en not_active Expired - Lifetime
- 1924-02-22 FR FR577680D patent/FR577680A/fr not_active Expired
- 1924-08-09 GB GB18956/24A patent/GB240596A/en not_active Expired
- 1924-08-16 DE DEI25060D patent/DE533263C/de not_active Expired
- 1924-08-21 DE DEI25076D patent/DE517737C/de not_active Expired
- 1924-10-09 FR FR29525D patent/FR29525E/fr not_active Expired
- 1924-10-10 FR FR29528D patent/FR29528E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1778308A (en) | 1930-10-14 |
| DE517737C (de) | 1931-02-09 |
| US1926888A (en) | 1933-09-12 |
| FR577680A (fr) | 1924-08-09 |
| FR29528E (fr) | 1925-08-22 |
| CH109921A (de) | 1925-05-01 |
| GB240596A (en) | 1925-10-08 |
| DE533263C (de) | 1931-09-10 |
| FR29525E (fr) | 1925-08-22 |
| GB231798A (en) | 1925-03-30 |