GB378244A - Improvements in and relating to loud speakers - Google Patents
Improvements in and relating to loud speakersInfo
- Publication number
- GB378244A GB378244A GB27025/31A GB2702531A GB378244A GB 378244 A GB378244 A GB 378244A GB 27025/31 A GB27025/31 A GB 27025/31A GB 2702531 A GB2702531 A GB 2702531A GB 378244 A GB378244 A GB 378244A
- Authority
- GB
- United Kingdom
- Prior art keywords
- secured
- loud
- coil
- reed
- framework
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
378,244. Loud-speakers. IDEAL WERKE AKT.-GES. FUR DRAHTLOSE TELEPHONIE, 97, Grosse Leegestrasse, Hohenschonhausen, Berlin. Sept. 28, 1931, No. 27025. Convention date, July 18. [Class 40 (iv).] An electromagnetic actuating unit for a loud-speaker comprises a single pressed or cast framework 1 to which the magnet 2 and poleshoes 3, 4 are secured by screws 15, 16, 17, the coil 6 is secured at 7, one end of the reed 9 is secured at 8 and the leads 11 for the coil 6 are secured at 12. The framework is also formed with flanges 14 for fixing it to the loud-speaker chassis or other mounting frame. The reed 9 passes through the coil 6 and its free end oscillates past the poles 3, 4.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE378244X | 1931-07-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB378244A true GB378244A (en) | 1932-08-11 |
Family
ID=6344516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27025/31A Expired GB378244A (en) | 1931-07-18 | 1931-09-28 | Improvements in and relating to loud speakers |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE383016A (en) |
FR (1) | FR723893A (en) |
GB (1) | GB378244A (en) |
-
0
- BE BE383016D patent/BE383016A/xx unknown
-
1931
- 1931-09-28 GB GB27025/31A patent/GB378244A/en not_active Expired
- 1931-10-06 FR FR723893D patent/FR723893A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE383016A (en) | |
FR723893A (en) | 1932-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB677225A (en) | Improvements in or relating to electro-acoustic transducers | |
GB378244A (en) | Improvements in and relating to loud speakers | |
GB381322A (en) | Improvements in and relating to loud speakers | |
GB334493A (en) | Improvements in and relating to apparatus for producing sound | |
GB686934A (en) | Improvements in and relating to moving coil loudspeakers | |
GB297327A (en) | Improvements relating to sound-recording and reproducing apparatus particularly for advertising purposes | |
GB381706A (en) | Improvements in and relating to electro-dynamic loud speakers | |
GB255149A (en) | Improvements in or relating to loud speaking reproducer | |
GB499449A (en) | Telephone receiver | |
GB263478A (en) | Loud speakers | |
GB344130A (en) | Improvements in or relating to electrical translating devices such as loud speakers | |
GB387127A (en) | Improvements in loud-speakers | |
GB253080A (en) | Telephone instrument | |
GB261387A (en) | An improved telephone receiver of the loud speaker type | |
GB343544A (en) | Improvements in and relating to loud-speaking telephones | |
GB313406A (en) | Method and apparatus for the electromagnetic reproduction of sound | |
GB316876A (en) | Improvements in polarized call bells | |
GB243431A (en) | Improvements in and connected with telephonic receivers | |
GB862776A (en) | Improvements in or relating to moving-coil loudspeakers incorporating a permanent magnet | |
GB221923A (en) | Improvements in or relating to loud speaking telephones | |
GB313483A (en) | Electromagnetic sound reproducer | |
GB719188A (en) | Improvements in or relating to electro-dynamic loud-speakers | |
GB246574A (en) | Improvements in headphones for wireless and other telegraphy and telephony | |
GB204023A (en) | Improvements in and relating to loud-speaking apparatus | |
GB227560A (en) | Improvements in telephone receivers and the like |