GB289804A - Improvements in or relating to magnet systems for converting electrical into acoustic oscillations and vice versa - Google Patents
Improvements in or relating to magnet systems for converting electrical into acoustic oscillations and vice versaInfo
- Publication number
- GB289804A GB289804A GB11892/28A GB1189228A GB289804A GB 289804 A GB289804 A GB 289804A GB 11892/28 A GB11892/28 A GB 11892/28A GB 1189228 A GB1189228 A GB 1189228A GB 289804 A GB289804 A GB 289804A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- pole pieces
- vice versa
- converting electrical
- windings
- 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
289,804. Naamlooze Vennootschap philips' Gloeilampenfabrieken. May 2, 1927, [Convention date]. Magnetic instruments.-A balanced ferromagnetic system for converting electrical into acoustic oscillations or vice versa has an air gap or paramagnetic material, as distinct from ferromagnetic material, provided in the path of the permanent flux to cause a high reluctance therefor. With such an arrangement weak springs are sufficient to return the armature to its normal position. Fig. 1 shows a balanced armature system in which the armature 14 is located between pole pieces 12, 13 separated from a permanent magnet 11 by air gaps 17. The armature is pivoted at 15 and surrounded by immovably arranged speech windings 18. In this arrangement the total amount of the magnetic fluxes produced in the poles of like nature is substantially constant, whilst the alternating flux produced by the current in the coil meets with a normal reluctance. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a construction, Fig. 1, (Cancelled) in which a permanent magnet 1 carrying the speech windings 8 is provided with pole pieces 2, 3 between which is an armature 4 carried by a weak spring 5 clamped at 6. Small air gaps 7 are provided between each pole piece and the magnet. A wide air gap is preferably provided between the armature and pole pieces. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL289804X | 1927-05-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB289804A true GB289804A (en) | 1929-08-23 |
Family
ID=19782696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11892/28A Expired GB289804A (en) | 1927-05-02 | 1928-04-23 | Improvements in or relating to magnet systems for converting electrical into acoustic oscillations and vice versa |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE350790A (en) |
FR (1) | FR653343A (en) |
GB (1) | GB289804A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2915388B1 (en) | 2007-04-27 | 2010-12-24 | Oreal | COSMETIC WATER SOLUBLE FILM |
FR2977797B1 (en) | 2011-07-13 | 2014-01-17 | Urgo Lab | COSMETIC AND / OR DERMATOLOGICAL USE OF OLIGOSACCHARIDE COMPOUNDS FOR THE PREVENTION AND TREATMENT OF STRETCHERS |
FR3026949A1 (en) | 2014-10-09 | 2016-04-15 | Urgo Lab | COSMETIC AND / OR DERMATOLOGICAL COMPOSITION FOR THE PREVENTION AND TREATMENT OF SKIN VARICE |
-
0
- BE BE350790D patent/BE350790A/xx unknown
-
1928
- 1928-04-23 FR FR653343D patent/FR653343A/en not_active Expired
- 1928-04-23 GB GB11892/28A patent/GB289804A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR653343A (en) | 1929-03-20 |
BE350790A (en) |
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