GB1340158A - Electret devices - Google Patents
Electret devicesInfo
- Publication number
- GB1340158A GB1340158A GB3492872A GB3492872A GB1340158A GB 1340158 A GB1340158 A GB 1340158A GB 3492872 A GB3492872 A GB 3492872A GB 3492872 A GB3492872 A GB 3492872A GB 1340158 A GB1340158 A GB 1340158A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electret
- july
- projections
- electrets
- dome
- 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
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- -1 polypropylene Polymers 0.000 abstract 2
- 239000004812 Fluorinated ethylene propylene Substances 0.000 abstract 1
- 239000004743 Polypropylene Substances 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000004049 embossing Methods 0.000 abstract 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910052763 palladium Inorganic materials 0.000 abstract 1
- 229920009441 perflouroethylene propylene Polymers 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 229920001155 polypropylene Polymers 0.000 abstract 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
- H04R19/00—Electrostatic transducers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
- H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Filtering Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5601771A JPS5115599B1 (enrdf_load_stackoverflow) | 1971-07-28 | 1971-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1340158A true GB1340158A (en) | 1973-12-12 |
Family
ID=13015277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3492872A Expired GB1340158A (en) | 1971-07-28 | 1972-07-26 | Electret devices |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5115599B1 (enrdf_load_stackoverflow) |
| DE (1) | DE2237413A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2147264B1 (enrdf_load_stackoverflow) |
| GB (1) | GB1340158A (enrdf_load_stackoverflow) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2532980A1 (de) * | 1974-08-15 | 1976-03-04 | Ericsson Telefon Ab L M | Verfahren zur herstellung eines elektretmikrophons mit genau bestimmtem luftspalt |
| US4356049A (en) | 1979-05-25 | 1982-10-26 | Tokyo Shibaura Denki Kabushiki Kaisha | Method of manufacturing an electret device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT374326B (de) * | 1982-07-22 | 1984-04-10 | Akg Akustische Kino Geraete | Elektrostatischer wandler, insbesondere kondensatormikrophon |
-
1971
- 1971-07-28 JP JP5601771A patent/JPS5115599B1/ja active Pending
-
1972
- 1972-07-26 GB GB3492872A patent/GB1340158A/en not_active Expired
- 1972-07-27 FR FR7227119A patent/FR2147264B1/fr not_active Expired
- 1972-07-27 DE DE19722237413 patent/DE2237413A1/de active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2532980A1 (de) * | 1974-08-15 | 1976-03-04 | Ericsson Telefon Ab L M | Verfahren zur herstellung eines elektretmikrophons mit genau bestimmtem luftspalt |
| US4356049A (en) | 1979-05-25 | 1982-10-26 | Tokyo Shibaura Denki Kabushiki Kaisha | Method of manufacturing an electret device |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2147264B1 (enrdf_load_stackoverflow) | 1976-03-12 |
| FR2147264A1 (enrdf_load_stackoverflow) | 1973-03-09 |
| DE2237413A1 (de) | 1973-02-08 |
| JPS5115599B1 (enrdf_load_stackoverflow) | 1976-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU421069B2 (en) | Process for producing resinous layer with embossed surface | |
| IT986503B (it) | Procedimento per la preparazione di polimeri polipentenamerici ad elevato tenore della forma cis | |
| GB1396370A (en) | Process for the manufacture of aqueous polymer latices | |
| GB1340158A (en) | Electret devices | |
| CA945109A (en) | Surface coating method by electrolytic polymerization | |
| ES381840A1 (es) | Perfeccionamientos en la fabricacion de cables electricos. | |
| BE799184A (fr) | Feuille de graphite densifiee par un polymere utilisable comme connecteur impemeable pour un condensateur electrique, | |
| CA922026A (en) | Method of making electrical contacts on the surface of a semiconductor device | |
| CH694766A4 (en) | Secondary battery and method for forming the same | |
| GB730160A (en) | Titanium nitride electrolytic condenser | |
| GB1250450A (enrdf_load_stackoverflow) | ||
| GB1336869A (en) | Cross-linked polymer articles | |
| IT945192B (it) | Procedimento per ricoprire con polimeri una superficie conduttiva | |
| SU829190A1 (ru) | Диэлектрический сепаратор | |
| CA873929A (en) | Electrically conductive, low friction fluorocarbon polymer coating method | |
| FR2239020A2 (en) | Electric lead-acid accumulator - has negative grid plate of plastic material with metallic coating | |
| FR2287093A1 (fr) | Films pour dielectriques de condensateurs de precision | |
| CA1006297A (en) | High polymer electret | |
| CA976964A (en) | 7-alkyl-4-(1-substituted-1,2,5,6-tetrahydro-4-pyridyl)-2,2-dimethylchroman-5-ols | |
| CA953059A (en) | Process for the production of polymer solutions | |
| CA866158A (en) | Method for the manufacture of hard, synthetic polymer containing wood | |
| CA872873A (en) | Polymerization by contact with materials having positive holes therein | |
| CA865612A (en) | Porous, fibrillated polytetrafluoroethylene | |
| CA866282A (en) | Polymerization process for the production of alpha-olefin polymers | |
| CA886792A (en) | Pressure electrical contact assembly for an electrical device and process of producing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
| PCNP | Patent ceased through non-payment of renewal fee |