GB161277A - Improvements in and relating to telephone transmitters - Google Patents
Improvements in and relating to telephone transmittersInfo
- Publication number
- GB161277A GB161277A GB431/20A GB43120A GB161277A GB 161277 A GB161277 A GB 161277A GB 431/20 A GB431/20 A GB 431/20A GB 43120 A GB43120 A GB 43120A GB 161277 A GB161277 A GB 161277A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- oblique
- electrodes
- plane
- sides
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
161,277. Feeny, V. F., (Magnavox Co.). Jan. 6, 1920. Transmitters; mouthpieces.-In a transmitter in which both sides of the diaphragm are exposed to sounds, the electrodes are protected from damp and mechanical injury, and their plane is oblique to that of the diaphragm so that the instrument functions in either a vertical or a horizontal position. The button 1 containing the electrodes is mounted in a watertight casing 13, and is carried by a bushing 3 which holds the shank 2. Its plane is oblique to that of the diaphragm, to which it is connected by a pin 12 passing through a water-tight hole in a gasket 18 which acts as an acoustic insulator and is free enough not to impede the vibrations. The diaphragm is held in position by clamping springs 17, and is enclosed in a chamber which is perforated to admit sound on both sides. Specification 133,365 is referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB431/20A GB161277A (en) | 1920-01-06 | 1920-01-06 | Improvements in and relating to telephone transmitters |
FR508443A FR508443A (en) | 1920-01-06 | 1920-01-15 | Improvements to telephone transmitters |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB431/20A GB161277A (en) | 1920-01-06 | 1920-01-06 | Improvements in and relating to telephone transmitters |
FR508443T | 1920-01-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB161277A true GB161277A (en) | 1921-04-06 |
Family
ID=9704215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB431/20A Expired GB161277A (en) | 1920-01-06 | 1920-01-06 | Improvements in and relating to telephone transmitters |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR508443A (en) |
GB (1) | GB161277A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2541621B2 (en) * | 1988-04-20 | 1996-10-09 | 株式会社プリモ | Directional microphone |
-
1920
- 1920-01-06 GB GB431/20A patent/GB161277A/en not_active Expired
- 1920-01-15 FR FR508443A patent/FR508443A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR508443A (en) | 1920-10-11 |
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