ES297954A1 - Improvements in or relating to electro-dynamic devices - Google Patents
Improvements in or relating to electro-dynamic devicesInfo
- Publication number
- ES297954A1 ES297954A1 ES0297954A ES297954A ES297954A1 ES 297954 A1 ES297954 A1 ES 297954A1 ES 0297954 A ES0297954 A ES 0297954A ES 297954 A ES297954 A ES 297954A ES 297954 A1 ES297954 A1 ES 297954A1
- Authority
- ES
- Spain
- Prior art keywords
- poles
- diaphragm
- air gaps
- grooves
- electro
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
- H04R9/047—Construction in which the windings of the moving coil lay in the same plane
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
An electro-acoustic transducer of the dynamic type (e.g. a loud-speaker or microphone) comprises a unitary structure 1 (Fig. 1) of permanent magnet sintered oxide anisotropic material having a coercive force of at least 750 oersteds and formed with a plurality of poles, separated by grooves forming air gaps 3 between the poles. The poles are located in a common plane orthogonal to the direction (A) of easy magnetization of the material. The transducer further comprises a flat diaphragm 2 carrying at least one flat electrical conductor 5 which is formed so as to include a plurality of strips connected in series and extending parallel to each other and arranged so as to lie adjacent the air gaps 3 between the poles. The diaphragm 2 preferably is of polyester foil and conductor 5 is of aluminium. Duets 4 reduce acoustic damping. The air gaps 3 may be of rectangular or trapeziform cross-section. The ducts 4 may be formed by providing the unitary structure 1, on both sides, with a plurality of parallel grooves, the two groups of grooves being at right-angles to, and intersecting, one another. In a loud-speaker, two identical unitary structures 1 may be provided, one on each side of the diaphragm 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL290698 | 1963-03-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES297954A1 true ES297954A1 (en) | 1964-06-01 |
Family
ID=19754557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0297954A Expired ES297954A1 (en) | 1963-03-26 | 1964-03-24 | Improvements in or relating to electro-dynamic devices |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT239343B (en) |
| BE (1) | BE645644A (en) |
| CH (1) | CH418402A (en) |
| DE (1) | DE1206482B (en) |
| ES (1) | ES297954A1 (en) |
| GB (1) | GB1022009A (en) |
| NL (1) | NL290698A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6509969A (en) * | 1965-07-31 | 1967-02-01 | ||
| JPS5121332U (en) * | 1974-08-05 | 1976-02-17 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL236904A (en) * | 1958-03-07 |
-
0
- NL NL290698D patent/NL290698A/xx unknown
-
1964
- 1964-03-21 DE DEN24660A patent/DE1206482B/en active Pending
- 1964-03-23 AT AT252764A patent/AT239343B/en active
- 1964-03-23 GB GB1209064A patent/GB1022009A/en not_active Expired
- 1964-03-23 CH CH374864A patent/CH418402A/en unknown
- 1964-03-24 BE BE645644A patent/BE645644A/xx unknown
- 1964-03-24 ES ES0297954A patent/ES297954A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1206482B (en) | 1965-12-09 |
| BE645644A (en) | 1964-09-24 |
| NL290698A (en) | |
| AT239343B (en) | 1965-03-25 |
| GB1022009A (en) | 1966-03-09 |
| CH418402A (en) | 1966-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4480155A (en) | Diaphragm type magnetic transducer | |
| US4210786A (en) | Magnetic field structure for planar speaker | |
| US4471173A (en) | Piston-diaphragm speaker | |
| US3997739A (en) | Electrodynamic type electroacoustic transducer | |
| US3829623A (en) | Planar voice coil loudspeaker | |
| US3013905A (en) | Electroacoustic transducers | |
| US4384173A (en) | Electromagnetic planar diaphragm transducer | |
| US3209084A (en) | Electro-acoustical transducer | |
| GB1432721A (en) | Electro-acoustic transducer | |
| US3171904A (en) | Electrodynamic loud-speakers and microphones | |
| GB899546A (en) | Improvements in or relating to magnetic core assemblies | |
| ES297954A1 (en) | Improvements in or relating to electro-dynamic devices | |
| GB2055013A (en) | Magnetic circuits for a loudspeaker having a planar diaphragm | |
| SU581599A1 (en) | Band loudspeaker | |
| US3198890A (en) | High fidelity sound reproducer | |
| GB1471300A (en) | Diaphragm for electroacoustic transducer | |
| GB528400A (en) | Electro-acoustic devices | |
| US2978671A (en) | Electrodynamic transducer | |
| GB2123651A (en) | Transducers | |
| GB1096044A (en) | Improvements in magnetic core storage devices | |
| GB2055014A (en) | Voice coil assembly for a loudspeaker employing a square planar diaphragm | |
| GB1115407A (en) | Improvements in or relating to electrodynamic sound transducers | |
| JPS5955699A (en) | Entirely dynamic driving speaker | |
| ES375506A1 (en) | Electroacoustic transducer having a preformed non-magnetic gentering sleeve | |
| GB1065112A (en) | Transducer |