GB246630A - Improvements in or relating to electro-magnetic sound reproducing devices for telephony and like applications - Google Patents
Improvements in or relating to electro-magnetic sound reproducing devices for telephony and like applicationsInfo
- Publication number
- GB246630A GB246630A GB2960724A GB2960724A GB246630A GB 246630 A GB246630 A GB 246630A GB 2960724 A GB2960724 A GB 2960724A GB 2960724 A GB2960724 A GB 2960724A GB 246630 A GB246630 A GB 246630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- telephony
- electro
- relating
- pole pieces
- 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)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
246,630. Calamatianos, S. Dec. 10, 1924. No Patent granted (Sealing fee not paid). Magnetic instruments. - An electromagnetic sound reproducer consists of a horseshoe magnet 3, pole pieces 5 with coils 6, a plate 7 supported over the pole pieces and provided with two pins H, an armature 9 with dents fitting over the pins H and extended to contact with the centre of the diaphragm 10 and a spring I mounted on a support on the pole pieces pressing the armature 9 towards the pole tips. The magnet is fastened to an adjusting knob 2 screwing into the easing 1 and this knob 2 is rotated until the point of the armature presses against the diaphragm and the other end of the armature is raised slightly from the pole tips against the spring I.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2960724A GB246630A (en) | 1924-12-10 | 1924-12-10 | Improvements in or relating to electro-magnetic sound reproducing devices for telephony and like applications |
FR599375D FR599375A (en) | 1924-12-10 | 1925-04-24 | Advanced training in telephone receivers and speakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2960724A GB246630A (en) | 1924-12-10 | 1924-12-10 | Improvements in or relating to electro-magnetic sound reproducing devices for telephony and like applications |
Publications (1)
Publication Number | Publication Date |
---|---|
GB246630A true GB246630A (en) | 1926-02-04 |
Family
ID=10294214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2960724A Expired GB246630A (en) | 1924-12-10 | 1924-12-10 | Improvements in or relating to electro-magnetic sound reproducing devices for telephony and like applications |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR599375A (en) |
GB (1) | GB246630A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2432259A (en) * | 2005-11-14 | 2007-05-16 | Siemens Magnet Technology Ltd | A resin-impregnated supeconducting magnet coil and its method of manufacture which comprisies a cooling layer and a filler layer. |
-
1924
- 1924-12-10 GB GB2960724A patent/GB246630A/en not_active Expired
-
1925
- 1925-04-24 FR FR599375D patent/FR599375A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2432259A (en) * | 2005-11-14 | 2007-05-16 | Siemens Magnet Technology Ltd | A resin-impregnated supeconducting magnet coil and its method of manufacture which comprisies a cooling layer and a filler layer. |
GB2432259B (en) * | 2005-11-14 | 2008-01-30 | Siemens Magnet Technology Ltd | A resin-impregnated superconducting magnet coil comprising a cooling layer |
Also Published As
Publication number | Publication date |
---|---|
FR599375A (en) | 1926-01-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB241277A (en) | Improvements relating to diaphragms for acoustic instruments | |
GB246630A (en) | Improvements in or relating to electro-magnetic sound reproducing devices for telephony and like applications | |
GB334493A (en) | Improvements in and relating to apparatus for producing sound | |
GB355227A (en) | Improvements relating to the mounting of vibrating reeds, more particularly for use in connection with electromagnetic gramophone pick-ups, loud speakers and the like | |
US1854812A (en) | Telephone receiver | |
GB228102A (en) | Sound-reproducing instruments | |
GB255149A (en) | Improvements in or relating to loud speaking reproducer | |
GB254403A (en) | Improvements in electromagnetic microphones or the like, adapted to be actuated by agramophone or like record | |
GB310284A (en) | Improvements in and relating to apparatus for the electrical reproduction of sound | |
GB354057A (en) | An improved electric horn or sound producing device | |
GB278040A (en) | Improvements in or relating to a device for converting electric oscillations into acoustic vibrations, such as a loudspeaker | |
GB251116A (en) | Loud speaking telephone | |
US1535550A (en) | Electrically-actuated sound producer | |
GB287954A (en) | Improvements in and relating to the reproduction of talking machine records by electrical means | |
GB241151A (en) | ||
GB251151A (en) | Improvements in loud speaking devices for wireless receiving apparatus | |
GB253487A (en) | Electrical sound reproducing instrument | |
GB211826A (en) | Improvements in or relating to sound-reproducing devices, applicable also for recording telegraphic signals | |
GB262869A (en) | Improvements in and relating to apparatus for transmitting or reproducing sound | |
GB203974A (en) | Improvements in or relating to electromagnetic receivers | |
GB208912A (en) | Device for the transmission of mechanic and acoustic vibrations | |
GB320994A (en) | Improvements relating to sound reproducing instruments | |
GB261089A (en) | Improvements in sound reproduction, recording, amplification and like devices | |
GB253080A (en) | Telephone instrument | |
GB273812A (en) | Improvements in or relating to telephone receivers |