GB198799A - Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus - Google Patents
Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatusInfo
- Publication number
- GB198799A GB198799A GB736422A GB736422A GB198799A GB 198799 A GB198799 A GB 198799A GB 736422 A GB736422 A GB 736422A GB 736422 A GB736422 A GB 736422A GB 198799 A GB198799 A GB 198799A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- sound
- chamber
- gramophones
- suchlike
- 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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/004—Transducers other than those covered by groups H04R9/00 - H04R21/00 using ionised gas
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
198,799. Clifford of Chudleigh, (W. H. Clifford), Baron. March 13, 1922. Multiple-diaphragm sound-boxes.- In apparatus in which the vibrations of the usual diaphragm 2 of a gramophone &c. are amplified by means of extra diaphragms 5, 7, which, with the diaphragm 2 form an air chamber 6 and a second chamber 8 containing non-inflammable gas preferably at less than atmospheric pressure, an electric current is passed through the gas chamber. When used for reproducing sound, this current preferably varies in correspondence with the sound waves. Fig. 2 shows the application to the reproduction of sound from a photographic record formed on a kinema film, by means of a selenium cell 13. Current variations corresponding to the sound record are passed through an electromagnet 15 the armature of which is fixed to the rear diaphragm 16, and are also applied to the gas chamber 17 to amplify the vibrations of the diaphragm 16. In order to transmit sound to a distance the back of the diaphragm 7 may be silvered to reflect a beam of light on to a selenium cell, so producing current variations corresponding to the sound waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB736422A GB198799A (en) | 1922-03-13 | 1922-03-13 | Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB736422A GB198799A (en) | 1922-03-13 | 1922-03-13 | Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB198799A true GB198799A (en) | 1923-06-13 |
Family
ID=9831699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB736422A Expired GB198799A (en) | 1922-03-13 | 1922-03-13 | Improvements in appliances for increasing the audibility of telephones, gramophones and suchlike wire and wireless phonetic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB198799A (en) |
-
1922
- 1922-03-13 GB GB736422A patent/GB198799A/en not_active Expired
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