GB233733A - Improvements in or relating to telephone instruments - Google Patents
Improvements in or relating to telephone instrumentsInfo
- Publication number
- GB233733A GB233733A GB12234/25A GB1223425A GB233733A GB 233733 A GB233733 A GB 233733A GB 12234/25 A GB12234/25 A GB 12234/25A GB 1223425 A GB1223425 A GB 1223425A GB 233733 A GB233733 A GB 233733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relating
- telephone instruments
- armature
- extensions
- magnets
- 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)
- Linear Motors (AREA)
Abstract
233,733. Neufeldt & Kuhnke. May 12, 1924, [Convention date]. Magnets.-The magnetic system of a telephone instrument comprises permanent magnets 1, 2 holding between them pole-shoes 3, 4 having polar extensions 5, 6 and 7, 8 respectively. An armature 9 is supported between the extensions and the permanent field passes in opposite directions across the ends of the armature.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE233733X | 1924-05-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB233733A true GB233733A (en) | 1926-06-24 |
Family
ID=5887717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12234/25A Expired GB233733A (en) | 1924-05-12 | 1925-05-11 | Improvements in or relating to telephone instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB233733A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3002057A (en) * | 1956-03-29 | 1961-09-26 | Vigren Sten Daniel | Polarized electromagnetic device |
GB2267512A (en) * | 1992-05-21 | 1993-12-08 | Vontec | Racket strings |
-
1925
- 1925-05-11 GB GB12234/25A patent/GB233733A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3002057A (en) * | 1956-03-29 | 1961-09-26 | Vigren Sten Daniel | Polarized electromagnetic device |
GB2267512A (en) * | 1992-05-21 | 1993-12-08 | Vontec | Racket strings |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB553955A (en) | Improvements in or relating to electro-magnetic sound-transmission apparatus | |
GB233733A (en) | Improvements in or relating to telephone instruments | |
GB514349A (en) | ||
GB481351A (en) | Improvements in or relating to telephone receivers | |
GB235920A (en) | Improvements in telephone receivers | |
GB334493A (en) | Improvements in and relating to apparatus for producing sound | |
GB238855A (en) | Improvements in telephone apparatus | |
GB357286A (en) | Improvements in or relating to a push-pull thermionic amplifier | |
GB591204A (en) | Improvements relating to electromagnetic telephone instruments | |
GB680206A (en) | Improvements in and relating to transformers | |
GB232975A (en) | Improvements in and relating to electric clocks | |
GB278406A (en) | Improvements in or relating to loud-speaking telephonic receivers | |
GB871867A (en) | Improvements in or relating to electric circuits employing elements which operate byvirtue of the hall effect | |
GB263478A (en) | Loud speakers | |
GB414967A (en) | Improvements relating to permanent magnets | |
GB389063A (en) | Improvements in or relating to electromagnetic devices | |
GB210358A (en) | Improvements in telephone receivers | |
GB329621A (en) | An arrangement of parallel co-operating magnets | |
GB213808A (en) | Telephone receiver | |
GB232600A (en) | Improvements relating to devices for translating electric into acoustic vibrations | |
GB322275A (en) | Improvements in or relating to sound reproducing devices | |
GB253080A (en) | Telephone instrument | |
GB300620A (en) | Improvements in loud-speaking telephones and like electro-acoustic devices | |
GB185773A (en) | Improvements in and relating to electric measuring instruments | |
GB261387A (en) | An improved telephone receiver of the loud speaker type |