FR2477824A1 - Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse - Google Patents
Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse Download PDFInfo
- Publication number
- FR2477824A1 FR2477824A1 FR8005143A FR8005143A FR2477824A1 FR 2477824 A1 FR2477824 A1 FR 2477824A1 FR 8005143 A FR8005143 A FR 8005143A FR 8005143 A FR8005143 A FR 8005143A FR 2477824 A1 FR2477824 A1 FR 2477824A1
- Authority
- FR
- France
- Prior art keywords
- membrane
- blank
- membranes
- cutting
- process according
- 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.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 49
- 230000005520 electrodynamics Effects 0.000 title claims abstract description 5
- 239000004794 expanded polystyrene Substances 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000009833 condensation Methods 0.000 claims abstract description 4
- 230000005494 condensation Effects 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract 2
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 7
- 239000004793 Polystyrene Substances 0.000 claims description 6
- 229920002223 polystyrene Polymers 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- 241000238876 Acari Species 0.000 claims description 3
- 238000011282 treatment Methods 0.000 claims description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims 2
- 239000004698 Polyethylene Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- -1 polyethylene Polymers 0.000 claims 1
- 229920000573 polyethylene Polymers 0.000 claims 1
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 239000003570 air Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Manufacturing & Machinery (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Molding Of Porous Articles (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8005143A FR2477824A1 (fr) | 1980-03-07 | 1980-03-07 | Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse |
| US06/234,020 US4348342A (en) | 1980-03-07 | 1981-02-12 | Method for making electrodynamic loudspeakers having a planar diaphragm of expanded polystyrene |
| JP3143481A JPS56143796A (en) | 1980-03-07 | 1981-03-06 | Method of manufacturing diaphragm for dynamic speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8005143A FR2477824A1 (fr) | 1980-03-07 | 1980-03-07 | Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2477824A1 true FR2477824A1 (fr) | 1981-09-11 |
| FR2477824B1 FR2477824B1 (OSRAM) | 1984-02-17 |
Family
ID=9239425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8005143A Granted FR2477824A1 (fr) | 1980-03-07 | 1980-03-07 | Perfectionnements apportes aux haut-parleurs electrodynamiques a membrane plane en polystyrene expanse |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4348342A (OSRAM) |
| JP (1) | JPS56143796A (OSRAM) |
| FR (1) | FR2477824A1 (OSRAM) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1497849A (fr) * | 1964-02-05 | 1967-10-13 | Electronic Res Associates | Haut-parleur |
| FR2036087A5 (OSRAM) * | 1969-03-04 | 1970-12-24 | Gogny Georges |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2604663A (en) * | 1950-01-06 | 1952-07-29 | Talalay Joseph Anton | Method of making a cellular rubber article |
| GB884322A (en) | 1959-06-15 | 1961-12-13 | Scholl Mfg Co Ltd | Improvements in and relating to fashioning plastic foam |
| FR1269138A (fr) | 1960-06-23 | 1961-08-11 | Perfectionnements apportés aux haut-parleurs, aux microphones, et aux dispositifs analogues, de type électrodynamique | |
| US3863908A (en) * | 1965-04-15 | 1975-02-04 | Saint Gobain | Cellular, resinous products and methods and apparatus for making them |
| FR1555781A (OSRAM) * | 1967-12-06 | 1969-01-31 | ||
| US3889032A (en) * | 1972-05-10 | 1975-06-10 | Lester Max Koelsch | Foamed plastic sheet material and system for its manufacture |
-
1980
- 1980-03-07 FR FR8005143A patent/FR2477824A1/fr active Granted
-
1981
- 1981-02-12 US US06/234,020 patent/US4348342A/en not_active Expired - Fee Related
- 1981-03-06 JP JP3143481A patent/JPS56143796A/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1497849A (fr) * | 1964-02-05 | 1967-10-13 | Electronic Res Associates | Haut-parleur |
| FR2036087A5 (OSRAM) * | 1969-03-04 | 1970-12-24 | Gogny Georges |
Also Published As
| Publication number | Publication date |
|---|---|
| US4348342A (en) | 1982-09-07 |
| JPS56143796A (en) | 1981-11-09 |
| FR2477824B1 (OSRAM) | 1984-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |