GB382165A - Improvements in and relating to microphones - Google Patents
Improvements in and relating to microphonesInfo
- Publication number
- GB382165A GB382165A GB4472/32A GB447232A GB382165A GB 382165 A GB382165 A GB 382165A GB 4472/32 A GB4472/32 A GB 4472/32A GB 447232 A GB447232 A GB 447232A GB 382165 A GB382165 A GB 382165A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- magnetic
- sleeve
- carbon
- magnet
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Telephone Set Structure (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4472/32A GB382165A (en) | 1932-02-15 | 1932-02-15 | Improvements in and relating to microphones |
DEL80593D DE602492C (de) | 1932-02-15 | 1932-02-26 | Mikrophon mit Kohlekoernerfuellung |
FR732482D FR732482A (fr) | 1932-02-15 | 1932-02-29 | Perfectionnements dans les microphones |
BE386838D BE386838A (pl) | 1932-02-15 | 1932-03-01 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4472/32A GB382165A (en) | 1932-02-15 | 1932-02-15 | Improvements in and relating to microphones |
DEL80593D DE602492C (de) | 1932-02-15 | 1932-02-26 | Mikrophon mit Kohlekoernerfuellung |
FR732482T | 1932-02-29 | ||
BE386838T | 1932-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB382165A true GB382165A (en) | 1932-10-20 |
Family
ID=9777816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4472/32A Expired GB382165A (en) | 1932-02-15 | 1932-02-15 | Improvements in and relating to microphones |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE386838A (pl) |
DE (1) | DE602492C (pl) |
FR (1) | FR732482A (pl) |
GB (1) | GB382165A (pl) |
-
1932
- 1932-02-15 GB GB4472/32A patent/GB382165A/en not_active Expired
- 1932-02-26 DE DEL80593D patent/DE602492C/de not_active Expired
- 1932-02-29 FR FR732482D patent/FR732482A/fr not_active Expired
- 1932-03-01 BE BE386838D patent/BE386838A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
BE386838A (pl) | 1932-04-30 |
FR732482A (fr) | 1932-09-21 |
DE602492C (de) | 1934-09-13 |
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