GB311722A - Improvements in and relating to electro magnetic instruments for converting oscillating currents into sound and vice versa - Google Patents
Improvements in and relating to electro magnetic instruments for converting oscillating currents into sound and vice versaInfo
- Publication number
- GB311722A GB311722A GB478728A GB478728A GB311722A GB 311722 A GB311722 A GB 311722A GB 478728 A GB478728 A GB 478728A GB 478728 A GB478728 A GB 478728A GB 311722 A GB311722 A GB 311722A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reed
- sound
- relating
- series
- vice versa
- 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)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
311,722. British Thomson-Houston Co., Ltd., and Ault, L. B. Feb. 15, 1928. Magnetic instruments.-A reed for a sound emitting or receiving diaphragm consists of a strip of metal, part of which is surrounded by a coil connected in series or in parallel with the actuating coils of the driving unit. In the construction, Fig. 1, the reed 1 consists of a strip of metal cut away at the parts 2, the remaining portion in the centre being reduced in thickness and surrounded by a coil 4 connected either in series or in parallel with the actuating coils of the driving unit. Fig. 3 shows a modification in which the reed is enlarged at the points 5 opposite the magnet pole pieces 6, the winding 7 surrounding the portion of the reed between the enlargements 5 and being connected in series with the winding on the pole-pieces 6. The reed, instead of being secured at both ends as shown, may be free at one end.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE358189D BE358189A (en) | 1928-02-15 | ||
| GB478728A GB311722A (en) | 1928-02-15 | 1928-02-15 | Improvements in and relating to electro magnetic instruments for converting oscillating currents into sound and vice versa |
| FR669349D FR669349A (en) | 1928-02-15 | 1929-02-08 | Improvements in electro-magnetic instruments to transform oscillating currents into sounds and vice versa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB478728A GB311722A (en) | 1928-02-15 | 1928-02-15 | Improvements in and relating to electro magnetic instruments for converting oscillating currents into sound and vice versa |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB311722A true GB311722A (en) | 1929-05-15 |
Family
ID=9783792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB478728A Expired GB311722A (en) | 1928-02-15 | 1928-02-15 | Improvements in and relating to electro magnetic instruments for converting oscillating currents into sound and vice versa |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE358189A (en) |
| FR (1) | FR669349A (en) |
| GB (1) | GB311722A (en) |
-
0
- BE BE358189D patent/BE358189A/xx unknown
-
1928
- 1928-02-15 GB GB478728A patent/GB311722A/en not_active Expired
-
1929
- 1929-02-08 FR FR669349D patent/FR669349A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR669349A (en) | 1929-11-14 |
| BE358189A (en) |
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