GB383921A - Improvements in or relating to acoustic diaphragms - Google Patents
Improvements in or relating to acoustic diaphragmsInfo
- Publication number
- GB383921A GB383921A GB19250/32A GB1925032A GB383921A GB 383921 A GB383921 A GB 383921A GB 19250/32 A GB19250/32 A GB 19250/32A GB 1925032 A GB1925032 A GB 1925032A GB 383921 A GB383921 A GB 383921A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ribs
- flange
- plane portions
- july
- interrupted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
- H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
383,921. Diaphragms. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. July 7, 1932, No. 19250. Convention date, July 14, 1931. [Class 40 (iv).] The edge of an acoustic diaphragm is formed with concentric ribs interrupted at intervals by plane portions. As shown, the diaphragm consists of a conical portion 1 surrounded by a flange 2, 3 which is secured to the cone by its conical portion 4. The part 2 of the flange is flat whilst the part 3 is furnished with concentric ribs 5 which are interrupted by radially extending plane portions 6. The ribs are of triangular section and preferably have apical angles of not less than 140‹ and the distance between the plane interruptions is preferably such that the arc formed by a portion of ribs situated between two successive interruptions is approximately the same as the corresponding chord. The flange can be pressed in one piece and in a single operation or the plane portions are produced by punching out the intermediate parts, the blank spaces so obtained being filled with separately formed ribbed parts of the same or different material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL383921X | 1931-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB383921A true GB383921A (en) | 1932-11-24 |
Family
ID=19785677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19250/32A Expired GB383921A (en) | 1931-07-14 | 1932-07-07 | Improvements in or relating to acoustic diaphragms |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE389706A (en) |
| FR (1) | FR739832A (en) |
| GB (1) | GB383921A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2439666A (en) * | 1944-01-31 | 1948-04-13 | Rca Corp | Loudspeaker diaphragm support |
-
0
- BE BE389706D patent/BE389706A/xx unknown
-
1932
- 1932-07-07 GB GB19250/32A patent/GB383921A/en not_active Expired
- 1932-07-08 FR FR739832D patent/FR739832A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2439666A (en) * | 1944-01-31 | 1948-04-13 | Rca Corp | Loudspeaker diaphragm support |
Also Published As
| Publication number | Publication date |
|---|---|
| BE389706A (en) | |
| FR739832A (en) | 1933-01-17 |
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