GB1230404A - - Google Patents
Info
- Publication number
- GB1230404A GB1230404A GB1230404DA GB1230404A GB 1230404 A GB1230404 A GB 1230404A GB 1230404D A GB1230404D A GB 1230404DA GB 1230404 A GB1230404 A GB 1230404A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electret
- polyhalocarbon
- electrets
- heading
- april
- 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
- 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
- H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
- H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
-
- 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
- H04R19/01—Electrostatic transducers characterised by the use of electrets
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63846367A | 1967-05-15 | 1967-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1230404A true GB1230404A (xx) | 1971-05-05 |
Family
ID=24560137
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1230404D Expired GB1230404A (xx) | 1967-05-15 | 1968-04-02 | |
GB1230403D Expired GB1230403A (xx) | 1967-05-15 | 1968-04-02 | |
GB1230402D Expired GB1230402A (xx) | 1967-05-15 | 1968-04-02 |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1230403D Expired GB1230403A (xx) | 1967-05-15 | 1968-04-02 | |
GB1230402D Expired GB1230402A (xx) | 1967-05-15 | 1968-04-02 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5025160B1 (xx) |
DE (1) | DE1639444B2 (xx) |
GB (3) | GB1230404A (xx) |
NL (1) | NL167542C (xx) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2199242A1 (xx) * | 1972-09-08 | 1974-04-05 | Uniroyal Ltd | |
US3985914A (en) * | 1974-09-11 | 1976-10-12 | Kureha Kagaku Kogyo Kabushiki Kaisha | Method for continuously polarizing thermoplastic film |
US4014091A (en) * | 1971-08-27 | 1977-03-29 | Sony Corporation | Method and apparatus for an electret transducer |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4815868B1 (xx) * | 1969-08-28 | 1973-05-17 | ||
AT323257B (de) * | 1973-06-26 | 1975-07-10 | Akg Akustische Kino Geraete | Kondensatormikrophon |
US4085297A (en) * | 1977-06-13 | 1978-04-18 | Polaroid Corporation | Spring force biasing means for electroacoustical transducer components |
JPS57188105A (en) * | 1981-05-14 | 1982-11-19 | Toshiba Corp | Electret constituent |
WO2014017204A1 (ja) * | 2012-07-25 | 2014-01-30 | 株式会社ビスキャス | 振動発電体 |
RU181900U1 (ru) * | 2018-04-16 | 2018-07-26 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Устройство для изготовления электретов |
KR102337495B1 (ko) | 2019-12-20 | 2021-12-09 | 삼성에스디아이 주식회사 | 부하 제어회로 감지시스템 |
-
1968
- 1968-01-16 DE DE19681639444 patent/DE1639444B2/de active Pending
- 1968-04-02 GB GB1230404D patent/GB1230404A/en not_active Expired
- 1968-04-02 GB GB1230403D patent/GB1230403A/en not_active Expired
- 1968-04-02 GB GB1230402D patent/GB1230402A/en not_active Expired
- 1968-04-25 NL NL6805919A patent/NL167542C/xx not_active IP Right Cessation
-
1969
- 1969-12-19 JP JP10174669A patent/JPS5025160B1/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4014091A (en) * | 1971-08-27 | 1977-03-29 | Sony Corporation | Method and apparatus for an electret transducer |
FR2199242A1 (xx) * | 1972-09-08 | 1974-04-05 | Uniroyal Ltd | |
US3985914A (en) * | 1974-09-11 | 1976-10-12 | Kureha Kagaku Kogyo Kabushiki Kaisha | Method for continuously polarizing thermoplastic film |
Also Published As
Publication number | Publication date |
---|---|
NL6805919A (xx) | 1968-11-18 |
NL167542C (nl) | 1981-12-16 |
JPS5025160B1 (xx) | 1975-08-21 |
DE1639444A1 (de) | 1971-04-22 |
GB1230403A (xx) | 1971-05-05 |
NL167542B (nl) | 1981-07-16 |
GB1230402A (xx) | 1971-05-05 |
DE1639444B2 (de) | 1972-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |