GB238945A - Improvements in and relating to devices for transmitting or reproducing sound - Google Patents
Improvements in and relating to devices for transmitting or reproducing soundInfo
- Publication number
- GB238945A GB238945A GB1301124A GB1301124A GB238945A GB 238945 A GB238945 A GB 238945A GB 1301124 A GB1301124 A GB 1301124A GB 1301124 A GB1301124 A GB 1301124A GB 238945 A GB238945 A GB 238945A
- Authority
- GB
- United Kingdom
- Prior art keywords
- face
- casing
- diaphragm
- loud
- centre
- 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
- 239000002184 metal Substances 0.000 abstract 2
- 235000014676 Phragmites communis Nutrition 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000009987 spinning Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
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
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
238,945. Brown, S. G. May 27, 1924. Diaphragms.-A vibrating element, more particularly for microphones, telephone receivers, and gramophones, comprises a double diaphragm of thin metal in which the interior is open to the atmosphere and one face only is rigidly attached, the attachment being about the centre of that face. One face is caused to vibrate, the other face being fixed about its centre to a casing and having a hole communicating with the atmosphere through the casing. As shown, the faces a, b each have a conical portion and a flat annular portion, their peripheries being united by spinning, welding, &c. The conical portions point in the same direction and the air space between the faces is of uniform thickness. Grooves k may be provided to increase flexibility. In applying the diaphragm to a loud-speaker, a flat portion on the face b is attached to a vibrating reed l, Fig. 4, and a flange f around a central aperture in the face a is fitted tightly within an inwardly projecting portion n of the base-plate m carrying the horn. As applied to a telephone receiver or as a modification of the loud-speaker mounting, the flanged central aperture in the face a is secured' by a collar in a central opening in a disc-like member, the periphery of which is secured against a cylindrical member or sleeve in the casing of the receiver or by a screwed cap or ear-piece. The diaphragm may be made of material otherthan metal.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1301124A GB238945A (en) | 1924-05-27 | 1924-05-27 | Improvements in and relating to devices for transmitting or reproducing sound |
| DEB117904D DE466457C (en) | 1924-05-27 | 1925-01-28 | Sound reproduction device with double membrane surrounded by a housing |
| FR596076D FR596076A (en) | 1924-05-27 | 1925-02-04 | Improvements to sound transmission and reproduction devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1301124A GB238945A (en) | 1924-05-27 | 1924-05-27 | Improvements in and relating to devices for transmitting or reproducing sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB238945A true GB238945A (en) | 1925-08-27 |
Family
ID=10015188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1301124A Expired GB238945A (en) | 1924-05-27 | 1924-05-27 | Improvements in and relating to devices for transmitting or reproducing sound |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE466457C (en) |
| FR (1) | FR596076A (en) |
| GB (1) | GB238945A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1025452B (en) * | 1952-09-18 | 1958-03-06 | Standard Elektrik Ag | Electro-acoustic converter with Helmholz resonator |
| DE947806C (en) * | 1954-02-16 | 1956-08-23 | Krone Kg | Earpiece for telephones |
-
1924
- 1924-05-27 GB GB1301124A patent/GB238945A/en not_active Expired
-
1925
- 1925-01-28 DE DEB117904D patent/DE466457C/en not_active Expired
- 1925-02-04 FR FR596076D patent/FR596076A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR596076A (en) | 1925-10-15 |
| DE466457C (en) | 1928-10-06 |
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