GB167811A - Improvements in or relating to the diaphragms of sound recording and reproducing instruments - Google Patents
Improvements in or relating to the diaphragms of sound recording and reproducing instrumentsInfo
- Publication number
- GB167811A GB167811A GB1023520A GB1023520A GB167811A GB 167811 A GB167811 A GB 167811A GB 1023520 A GB1023520 A GB 1023520A GB 1023520 A GB1023520 A GB 1023520A GB 167811 A GB167811 A GB 167811A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- diaphragms
- arrangement
- relating
- celluloid
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
167,811. Clifton, W. E., and Ewart, J. S. April 13, 1920. Diaphragms, construction and shape of. A diaphragm is formed mainly of substantially non- resilient material and has a relatively stiff portion disposed in the middle or partly in the middle. In one arrangement, a diaphragm F, Fig. 4, of oiled silk is cut away to receive a radial strip G of stiffer material such as mica. covering discs of paper being then applied by adhesive to both sides. In another arrangement, the oiled silk part is replaced by a film of celluloid F, Fig. 7, which may have circular and cross stiffening corrugations J, K, L, and a part G is then stiffened by applying pieces of paper or other material to one or both sides. A small strip M of celluloid or other material may be applied over the part G. In a further arrangement, a mica or other diaphragm N, Fig. 5, is weakened by perforations P to leave a relatively stiff part at O. Specification 27110/07 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1023520A GB167811A (en) | 1920-04-13 | 1920-04-13 | Improvements in or relating to the diaphragms of sound recording and reproducing instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1023520A GB167811A (en) | 1920-04-13 | 1920-04-13 | Improvements in or relating to the diaphragms of sound recording and reproducing instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB167811A true GB167811A (en) | 1921-08-15 |
Family
ID=9964102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1023520A Expired GB167811A (en) | 1920-04-13 | 1920-04-13 | Improvements in or relating to the diaphragms of sound recording and reproducing instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB167811A (en) |
-
1920
- 1920-04-13 GB GB1023520A patent/GB167811A/en not_active Expired
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