CH619821A5 - - Google Patents
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- Publication number
- CH619821A5 CH619821A5 CH1506475A CH1506475A CH619821A5 CH 619821 A5 CH619821 A5 CH 619821A5 CH 1506475 A CH1506475 A CH 1506475A CH 1506475 A CH1506475 A CH 1506475A CH 619821 A5 CH619821 A5 CH 619821A5
- Authority
- CH
- Switzerland
- Prior art keywords
- membrane
- layer
- film
- membrane according
- viscoelastic
- Prior art date
Links
- 239000012528 membrane Substances 0.000 claims description 49
- 238000013016 damping Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 229920000578 graft copolymer Polymers 0.000 claims description 9
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003190 viscoelastic substance Substances 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 229920002620 polyvinyl fluoride Polymers 0.000 claims description 3
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 claims description 3
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 3
- -1 2-ethyl Chemical group 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
-
- 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
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2327/00—Polyvinylhalogenides
- B32B2327/12—Polyvinylhalogenides containing fluorine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2369/00—Polycarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
- H04R2440/01—Acoustic transducers using travelling bending waves to generate or detect sound
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Laminated Bodies (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Paper (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2500397A DE2500397C2 (de) | 1975-01-07 | 1975-01-07 | Membran für ein elektroakustisches Wandlersystem und damit ausgerüstetes elektroakustisches Wandlersystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH619821A5 true CH619821A5 (cs) | 1980-10-15 |
Family
ID=5936042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1506475A CH619821A5 (cs) | 1975-01-07 | 1975-11-20 |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US4029171A (cs) |
| JP (1) | JPS5850480B2 (cs) |
| BE (1) | BE835983A (cs) |
| CA (1) | CA1050156A (cs) |
| CH (1) | CH619821A5 (cs) |
| DD (1) | DD122308A5 (cs) |
| DE (1) | DE2500397C2 (cs) |
| DK (1) | DK142830C (cs) |
| FR (1) | FR2297536A1 (cs) |
| GB (1) | GB1515677A (cs) |
| IE (1) | IE41993B1 (cs) |
| IT (1) | IT1054715B (cs) |
| LU (1) | LU74135A1 (cs) |
| MC (1) | MC1083A1 (cs) |
| NL (1) | NL7513427A (cs) |
| NO (1) | NO140039C (cs) |
| SE (1) | SE408990B (cs) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009024709A1 (de) * | 2009-06-12 | 2010-12-16 | Klaus Reck | Hochtonlautsprecher |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5379525A (en) * | 1976-12-23 | 1978-07-14 | Sony Corp | Compound diaphtagm for speakers |
| JPS5412823A (en) * | 1977-06-30 | 1979-01-30 | Pioneer Electronic Corp | Speaker vibrator |
| JPS5527702A (en) * | 1978-08-18 | 1980-02-28 | Sony Corp | Vibrator for speaker |
| DE2941644C2 (de) * | 1978-10-17 | 1982-11-11 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka | Lautsprechermembran und Verfahren zu ihrer Herstellung |
| DE2851745C2 (de) * | 1978-11-30 | 1985-01-10 | Elektrotechnik Ehmann Gmbh, 6953 Gundelsheim | Mehrschichtige Membran für einen elektroakustischen Wandler |
| JPS5927156B2 (ja) * | 1980-12-03 | 1984-07-03 | オンキヨー株式会社 | スピ−カ−用振動板の製造方法 |
| JPS57111192U (cs) * | 1980-12-26 | 1982-07-09 | ||
| DE3123098C2 (de) * | 1981-06-11 | 1983-06-01 | Martin 4600 Dortmund Stute | Membran für elektroakustische Wandlersysteme |
| US4421956A (en) | 1981-09-29 | 1983-12-20 | Peavey Electronics Corp. | Loud speaker with minimized magnetic leakage |
| DE3309617A1 (de) * | 1983-03-17 | 1984-09-20 | Oskar 6837 St Leon-Rot Knecht | Elektroakustischer wandler |
| DE3319423C2 (de) * | 1983-05-28 | 1985-03-28 | Fa.Visaton Peter Schukat, 5657 Haan | Lautsprechermembran |
| NL8501650A (nl) * | 1985-06-07 | 1987-01-02 | Philips Nv | Elektrodynamische omzetter met een tweedelig membraan. |
| DE3521845A1 (de) * | 1985-06-19 | 1987-01-02 | Martin Stute | Elektrodynamischer lautsprecher |
| NL8602451A (nl) * | 1986-09-29 | 1988-04-18 | Philips Nv | Luidspreker met een tweedelig membraan voor toepassing als autoluidspreker. |
| WO1988008239A1 (en) * | 1987-04-08 | 1988-10-20 | Harman International Industries, Incorporated | Shallow loudspeaker |
| US4799264A (en) * | 1987-09-28 | 1989-01-17 | Plummer Jan P | Speaker system |
| US4903308A (en) * | 1988-02-10 | 1990-02-20 | Linaeum Corporation | Audio transducer with controlled flexibility diaphragm |
| US5198624A (en) * | 1988-02-10 | 1993-03-30 | Linaeum Corporation | Audio transducer with controlled flexibility diaphragm |
| JPH01295598A (ja) * | 1988-02-26 | 1989-11-29 | Yasuhiro Shinjiyou | スピーカー |
| DE19526124C2 (de) * | 1995-07-19 | 1997-06-26 | Sennheiser Electronic | Einrichtung mit aktiver Lärmkompensation |
| US5805726A (en) * | 1995-08-11 | 1998-09-08 | Industrial Technology Research Institute | Piezoelectric full-range loudspeaker |
| FR2854021B1 (fr) * | 2003-04-16 | 2006-03-31 | Focal Jmlab | Transducteur acoustiques en beryllium pur a radiation directe, a membrane de forme concave, pour applications audio notamment pour enceintes acoustiques |
| DK1772039T3 (da) * | 2004-06-03 | 2012-05-29 | Tymphany Hk Ltd | Akustisk transducer omfattende adskillige koaksialt placerede membraner |
| US9462388B2 (en) | 2004-06-03 | 2016-10-04 | Tymphany Hk Limited | Acoustic transducer comprising a plurality of coaxially arranged diaphragms |
| KR101199689B1 (ko) * | 2005-03-10 | 2012-11-08 | 놀레스 일렉트로닉스 아시아 피티이 리미티드 | 전자음향 변환기용 멤브레인, 전자음향 변환기 및 이를포함하는 디바이스 |
| DE102010021157A1 (de) | 2010-05-21 | 2011-11-24 | Daniela Manger | 3D-Stereospaltmikrofon |
| GB2503423A (en) * | 2012-05-11 | 2014-01-01 | Deben Acoustics | Balanced-mode radiator with multiple voice coil assembly |
| CN111866671B (zh) * | 2019-04-24 | 2021-11-16 | 歌尔股份有限公司 | 一种用于微型发声装置的振膜和微型发声装置 |
| CN111848994B (zh) * | 2019-04-24 | 2022-04-05 | 歌尔股份有限公司 | 一种微型发声装置 |
| CN111866669B (zh) * | 2019-04-24 | 2021-11-16 | 歌尔股份有限公司 | 一种用于微型发声装置的振膜和微型发声装置 |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2834424A (en) * | 1956-01-26 | 1958-05-13 | Altec Lansing Corp | Sound-reproducing device |
| US3111187A (en) * | 1959-11-23 | 1963-11-19 | H J Leak & Company Ltd | Diaphragm for electro acoustic transducer |
| US3141071A (en) * | 1960-07-18 | 1964-07-14 | Rosen Alfred H | Full range electroacoustic transducers |
| US3093207A (en) * | 1960-10-04 | 1963-06-11 | R T Bozak Mfg Company | Metallic diaphragm for electrodynamic loudspeakers |
| US3154172A (en) * | 1962-07-19 | 1964-10-27 | Tibbetts Industries | Diaphragm and impedance means |
| AT238274B (de) * | 1962-09-24 | 1965-02-10 | Akg Akustische Kino Geraete | Mehrschichtmembran, insbesondere für Schallwandler |
| US3285364A (en) * | 1965-06-01 | 1966-11-15 | Ling Temco Vought Inc | Loudspeaker construction |
| DE1301663B (de) * | 1967-12-05 | 1969-08-21 | Hoechst Ag | Verbundsysteme aus harten Platten mit schwingungsdaempfenden viskoelastischen Zwischenschichten hoher Temperaturbandbreite |
| DE1301666B (de) * | 1967-12-05 | 1969-08-21 | Hoechst Ag | Verbundsystem aus harten Platten mit schwingungsdaempfenden viskoelastischen Zwischenschichten hoher Temperaturbandbreite |
| DE1301662B (de) * | 1967-12-05 | 1969-08-21 | Hoechst Ag | Verbundsysteme aus harten Platten mit schwingungsdaempfenden viskoelastischen Zwischenschichten hoher Temperaturbandbreite |
| DE1301665B (de) * | 1967-12-05 | 1969-08-21 | Hoechst Ag | Verbundsystem aus harten Platten mit schwingungsdaempfenden viskoelastischen Zwischenschichten hoher Temperaturbandbreite |
| DE1301664B (de) * | 1967-12-05 | 1969-08-21 | Hoechst Ag | Verbundsysteme aus harten Platten mit schwingungsdaempfenden viskoelastischen Zwischenschichten hoher Temperaturbandbreite |
| DE1694228A1 (de) * | 1967-12-06 | 1971-07-22 | Hoechst Ag | Schwingungsgedaempfte Verbundsysteme mit Zwischenschichten aus Pfropfpolymerisaten von Styrol/Acrylnitril auf Vinylacetat/2-AEthyl-hexylacrylat/Dibutylmaleinat/Crotonsaeure-Copolymerisaten |
| DE1694225A1 (de) * | 1967-12-06 | 1971-07-22 | Hoechst Ag | Schwingungsgedaempfte Verbundsysteme mit Zwischenschichten aus Pfropfpolymerisaten von Styrol/Acrylnitril auf Vinylacetat/n-Butylacrylat/Dibutylmaleinat/Crotonsaeure-Copolymerisaten |
| DE1694226A1 (de) * | 1967-12-06 | 1971-07-22 | Hoechst Ag | Schwingungsgedaempfte Verbundsysteme mit Zwischenschichten aus Pfropfpolymerisaten von Methacrylsaeuremethylester oder Methacrylsaeuremethylester/Acrylsaeure auf Vinylacetat/2-AEthylhexylacrylat/Dibutylmaleinat/Crotonsaeure-Copolymerisaten |
| DE1694227A1 (de) * | 1967-12-06 | 1971-07-22 | Hoechst Ag | Schwingungsgedaempfte Verbundsysteme mit Zwischenschichten aus Pfropfpolymerisaten von Styrol oder Styrol/Acrylsaeure auf Vinylacetat/n-Butylacrylat/Dibutylmaleinat/Crotonsaeure-Copolymerisaten |
| US3603427A (en) * | 1968-11-19 | 1971-09-07 | Nippon Musical Instruments Mfg | Loudspeaker |
| DE1815694C2 (de) * | 1968-12-19 | 1971-02-18 | Manger J W | Elektrodynamisches Wandlersystem |
| US3586792A (en) * | 1970-02-24 | 1971-06-22 | Int Standard Electric Corp | Method for assembling electro-acoustical transducer diaphragm assemblies |
| DE2225710C3 (de) * | 1971-05-28 | 1975-12-04 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka | Membran für elektroakustische Wandler und Verfahren zu ihrer Herstellung |
| DE2236374C3 (de) * | 1972-07-25 | 1975-01-16 | Josef Wilhelm 8725 Arnstein Manger | Elektroakustisches Wandlersystem |
-
1975
- 1975-01-07 DE DE2500397A patent/DE2500397C2/de not_active Expired
- 1975-07-04 GB GB28326/75A patent/GB1515677A/en not_active Expired
- 1975-08-11 US US05/603,310 patent/US4029171A/en not_active Expired - Lifetime
- 1975-10-03 JP JP50119034A patent/JPS5850480B2/ja not_active Expired
- 1975-11-18 NL NL7513427A patent/NL7513427A/xx not_active Application Discontinuation
- 1975-11-20 CH CH1506475A patent/CH619821A5/de not_active IP Right Cessation
- 1975-11-25 NO NO753977A patent/NO140039C/no unknown
- 1975-11-26 FR FR7536223A patent/FR2297536A1/fr not_active Withdrawn
- 1975-11-26 BE BE162211A patent/BE835983A/xx not_active IP Right Cessation
- 1975-11-28 MC MC751172A patent/MC1083A1/xx unknown
- 1975-12-30 SE SE7514767A patent/SE408990B/xx not_active IP Right Cessation
-
1976
- 1976-01-05 DD DD190692A patent/DD122308A5/xx unknown
- 1976-01-05 LU LU74135A patent/LU74135A1/xx unknown
- 1976-01-05 IT IT19025/76A patent/IT1054715B/it active
- 1976-01-06 DK DK2876A patent/DK142830C/da active
- 1976-01-06 CA CA243,006A patent/CA1050156A/en not_active Expired
- 1976-01-07 IE IE25/76A patent/IE41993B1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009024709A1 (de) * | 2009-06-12 | 2010-12-16 | Klaus Reck | Hochtonlautsprecher |
Also Published As
| Publication number | Publication date |
|---|---|
| NO140039C (no) | 1979-06-27 |
| IE41993B1 (en) | 1980-05-07 |
| NL7513427A (nl) | 1976-07-09 |
| CA1050156A (en) | 1979-03-06 |
| DD122308A5 (cs) | 1976-09-20 |
| MC1083A1 (fr) | 1976-08-06 |
| DK142830B (da) | 1981-02-02 |
| NO753977L (cs) | 1976-07-08 |
| IT1054715B (it) | 1981-11-30 |
| JPS5180218A (cs) | 1976-07-13 |
| BE835983A (fr) | 1976-03-16 |
| IE41993L (en) | 1976-08-07 |
| SE7514767L (sv) | 1976-07-08 |
| FR2297536A1 (fr) | 1976-08-06 |
| DE2500397C2 (de) | 1986-05-28 |
| JPS5850480B2 (ja) | 1983-11-10 |
| US4029171A (en) | 1977-06-14 |
| AU8739375A (en) | 1977-06-16 |
| LU74135A1 (cs) | 1976-07-20 |
| DK142830C (da) | 1981-08-24 |
| GB1515677A (en) | 1978-06-28 |
| DK2876A (da) | 1976-07-08 |
| NO140039B (no) | 1979-03-12 |
| SE408990B (sv) | 1979-07-16 |
| DE2500397A1 (de) | 1976-07-08 |
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