GB291166A - Improvements in or relating to devices for converting electric oscillations into mechanical vibrations, such as telephones - Google Patents
Improvements in or relating to devices for converting electric oscillations into mechanical vibrations, such as telephonesInfo
- Publication number
- GB291166A GB291166A GB5879/27A GB587927A GB291166A GB 291166 A GB291166 A GB 291166A GB 5879/27 A GB5879/27 A GB 5879/27A GB 587927 A GB587927 A GB 587927A GB 291166 A GB291166 A GB 291166A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- pole
- pieces
- poles
- attached
- 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)
- Electromagnets (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Vibration Prevention Devices (AREA)
Abstract
291,166. Wade, H., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). March 2, 1927. Magnetic instruments.-The vibrating armature of a magnetic telephone instrument is surrounded by a coil carrying the telephonic currents, and is secured at its ends to a spring-supported frame which allows the armature freedom of movement in the direction of two parallel but oppositely-directed magnetic fields. As shown in Figs. 1 and 2, the pole-pieces 2, 3 are attached to a permanent magnet 1. Each pole-piece has two poles arranged diagonally so as to create, at the two gaps, oppositely-directed fluxes parallel to the legs of the magnet 1. The armature 6 is supported in the gaps by a rectangular frame 7 enveloping the pole-pieces and itself supported by springs 8 attached at one end to a rigid arm 9. The armature 6 is thus free to move bodily up and down between the poles 2, 3 and to operate a diaphragm &c. by the rod 5. Between the pole-pieces, and surrounding the armature 6, is arranged the coil 4 carrying the telephone current. The springs 8 may be stiff enough to prevent the armature 6 from making contact with the poles 2, 3; or wires or cords may be attached to the frame 7 to limit its vibratory movement.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL36042A NL22655C (en) | 1927-02-18 | 1927-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB291166A true GB291166A (en) | 1928-05-31 |
Family
ID=26240223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5879/27A Expired GB291166A (en) | 1927-02-18 | 1927-03-02 | Improvements in or relating to devices for converting electric oscillations into mechanical vibrations, such as telephones |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1820943A (en) |
| DE (1) | DE471236C (en) |
| FR (1) | FR630655A (en) |
| GB (1) | GB291166A (en) |
| NL (1) | NL22655C (en) |
-
1927
- 1927-02-18 NL NL36042A patent/NL22655C/xx active
- 1927-03-02 GB GB5879/27A patent/GB291166A/en not_active Expired
- 1927-03-10 FR FR630655D patent/FR630655A/en not_active Expired
- 1927-03-13 DE DEN27055D patent/DE471236C/en not_active Expired
- 1927-12-16 US US240571A patent/US1820943A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL22655C (en) | 1930-09-15 |
| FR630655A (en) | 1927-12-07 |
| DE471236C (en) | 1929-02-08 |
| US1820943A (en) | 1931-09-01 |
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