SE313839B - - Google Patents
Info
- Publication number
- SE313839B SE313839B SE500065A SE500065A SE313839B SE 313839 B SE313839 B SE 313839B SE 500065 A SE500065 A SE 500065A SE 500065 A SE500065 A SE 500065A SE 313839 B SE313839 B SE 313839B
- Authority
- SE
- Sweden
- Prior art keywords
- template
- ring
- diaphragm
- coil
- resin
- Prior art date
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
- H04R9/045—Mounting
Abstract
1,084,874. Moving coil transducers. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. April 15, 1965 [April 17, 1964], No. 16245/65. Heading H4J. In making a moving-coil transducer a diaphragm 2 and flexible centring member 3 are secured by a connecting sleeve containing deformable and hardenable material to the moving coil 1 by applying axial pressure to the various integers while resisting the radial forces arising as a result of the axial pressure. In manufacture, a lower template 16 is slipped on to a cylindrical jig 12 and the coil 1 is disposed on the jig 12. Output wires 6, 7 are taken upwards. A double-layered paper ring 19 impregnated with phenol-formaldehyde resin is placed in the lower template 16. The flexible centring member 3 is arranged on the frustoconical end 22 of the lower template 16, this member 3 being centred by an integral cylindrical collar 21. The diaphragm 2 is placed on the member 3 and is centred by a similar integral collar 20. Collars 20, 21 are impregnated with resin. A core 13 is next slid into the lower template 16 and jig 12, the lower end 15 serving as a guide. An upper template 17 is slid on to the core 13 and has an end 23 which mates with end 22. Pressure is applied to the upper template whilst the core 13, the lower part of template 17 and the upper part of template 16 are subjected to induction heating. The resin-impregnated ring 19 is softened and collapses and templates 16, 17 move downwards against compression of a spring 18. The distance between end 23 and the upper face of the coil 1 is reduced and the interior space is filled by the collars 20, 21, the ring 19 and the resin, whereupon thermohardening occurs. Heating is then stopped and the transducer assembly is cooled and removed. The ring 19 may be omitted if the collars 20, 21 are sufficiently long. Alternatively the annular space including the ring 19 may be filled with powder, which is subsequently heated and compressed. As a further alternative the sleeve may be made by injection moulding. The output leads 6, 7 are adhered to the diaphragm 2. A central dust protecting cap 8 (Fig. 1, not shown) is subsequently adhered to the inner periphery of the diaphragm 2. The method of manufacture is applicable to microphones and loud-speakers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR971388A FR1418828A (en) | 1964-04-17 | 1964-04-17 | Method of assembling an electrodynamic loudspeaker coil on the membrane thereof and loudspeaker thus obtained |
Publications (1)
Publication Number | Publication Date |
---|---|
SE313839B true SE313839B (en) | 1969-08-25 |
Family
ID=8828081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE500065A SE313839B (en) | 1964-04-17 | 1965-04-14 |
Country Status (10)
Country | Link |
---|---|
AT (1) | AT266944B (en) |
BE (1) | BE662579A (en) |
CH (1) | CH427913A (en) |
DE (1) | DE1252257B (en) |
FI (1) | FI41754B (en) |
FR (1) | FR1418828A (en) |
GB (1) | GB1084874A (en) |
NL (1) | NL6504824A (en) |
NO (1) | NO117985B (en) |
SE (1) | SE313839B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0251057A1 (en) * | 1986-06-21 | 1988-01-07 | EWD Electronic-Werke Deutschland GmbH | Loudspeaker |
-
0
- DE DENDAT1252257D patent/DE1252257B/de not_active Withdrawn
-
1964
- 1964-04-17 FR FR971388A patent/FR1418828A/en not_active Expired
-
1965
- 1965-04-14 CH CH522865A patent/CH427913A/en unknown
- 1965-04-14 FI FI91365A patent/FI41754B/fi active
- 1965-04-14 SE SE500065A patent/SE313839B/xx unknown
- 1965-04-14 NO NO15772665A patent/NO117985B/no unknown
- 1965-04-15 BE BE662579A patent/BE662579A/xx not_active Expired
- 1965-04-15 NL NL6504824A patent/NL6504824A/xx unknown
- 1965-04-15 AT AT349265A patent/AT266944B/en active
- 1965-04-15 GB GB1624565A patent/GB1084874A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH427913A (en) | 1967-01-15 |
FR1418828A (en) | 1965-11-26 |
NL6504824A (en) | 1965-10-18 |
BE662579A (en) | 1965-10-15 |
AT266944B (en) | 1968-12-10 |
DE1252257B (en) | |
GB1084874A (en) | 1967-09-27 |
NO117985B (en) | 1969-10-20 |
FI41754B (en) | 1969-10-31 |
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