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
Application number
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1230404A publication Critical patent/GB1230404A/en
Expired legal-status Critical Current

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)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
GB1230404D 1967-05-15 1968-04-02 Expired GB1230404A (pl)

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 (pl) 1971-05-05

Family

ID=24560137

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1230403D Expired GB1230403A (pl) 1967-05-15 1968-04-02
GB1230402D Expired GB1230402A (pl) 1967-05-15 1968-04-02
GB1230404D Expired GB1230404A (pl) 1967-05-15 1968-04-02

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB1230403D Expired GB1230403A (pl) 1967-05-15 1968-04-02
GB1230402D Expired GB1230402A (pl) 1967-05-15 1968-04-02

Country Status (4)

Country Link
JP (1) JPS5025160B1 (pl)
DE (1) DE1639444B2 (pl)
GB (3) GB1230403A (pl)
NL (1) NL167542C (pl)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199242A1 (pl) * 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4815868B1 (pl) * 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

Cited By (3)

* Cited by examiner, † Cited by third party
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 (pl) * 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
GB1230402A (pl) 1971-05-05
JPS5025160B1 (pl) 1975-08-21
NL6805919A (pl) 1968-11-18
DE1639444A1 (de) 1971-04-22
GB1230403A (pl) 1971-05-05
NL167542B (nl) 1981-07-16
NL167542C (nl) 1981-12-16
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