CH621679GA3 - - Google Patents

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Publication number
CH621679GA3
CH621679GA3 CH806378A CH806378A CH621679GA3 CH 621679G A3 CH621679G A3 CH 621679GA3 CH 806378 A CH806378 A CH 806378A CH 806378 A CH806378 A CH 806378A CH 621679G A3 CH621679G A3 CH 621679GA3
Authority
CH
Switzerland
Prior art keywords
dielectric
rotor
dielectric member
casing
stator
Prior art date
Application number
CH806378A
Other versions
CH621679B (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
Publication of CH621679B publication Critical patent/CH621679B/en
Application filed filed Critical
Publication of CH621679GA3 publication Critical patent/CH621679GA3/xx

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/01—Details
    • H01G5/013—Dielectrics
    • H01G5/0134—Solid dielectrics
    • H01G5/0136—Solid dielectrics with movable electrodes

Abstract

A ceramic trimmer capacitor comprising a cylindrical casing, a stator and a rotor comprising a rotor casing and a dielectric assembly consisting of a disk-shaped ceramic dielectric member, a semicircular dielectric layer formed upon the upper surface of the dielectric member and having a low dielectric constant less than 20 and a coefficient of thermal expansion substantially equal to the dielectric member and a rotor electrode formed on the whole surface of the dielectric member including the semicircular dielectric layer, the dielectric assembly being inserted into the rotor casing and electrically and mechanically connected thereto; the stator and the rotor being placed in the cylindrical casing and resiliently supported. Stray capacitance is almost negligible; the variable capacitance range may be considerably improved; and the mechanical strength may be increased. The ceramic trimmer capacitor is especially adapted to be used in an electronic watch.
CH806378A 1977-07-26 1978-07-26 CONDENSATEUR AJUSTABLE MINIATURE A LA CERAMIQUE. CH621679B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52090000A JPS6011451B2 (en) 1977-07-26 1977-07-26 variable porcelain capacitor

Publications (2)

Publication Number Publication Date
CH621679B CH621679B (en)
CH621679GA3 true CH621679GA3 (en) 1981-02-27

Family

ID=13986317

Family Applications (1)

Application Number Title Priority Date Filing Date
CH806378A CH621679B (en) 1977-07-26 1978-07-26 CONDENSATEUR AJUSTABLE MINIATURE A LA CERAMIQUE.

Country Status (4)

Country Link
US (1) US4181923A (en)
JP (1) JPS6011451B2 (en)
CH (1) CH621679B (en)
DE (1) DE2832809C2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142671A1 (en) * 1981-10-28 1983-05-11 Stettner & Co, 8560 Lauf DISC TRIMMER
JPS58171810A (en) * 1982-04-02 1983-10-08 志水電機工業有限会社 Variable porcelain condenser
JPS61196522U (en) * 1985-05-29 1986-12-08
US4876627A (en) * 1989-04-06 1989-10-24 Voltronics Corporation Variable electronic component
KR100254146B1 (en) * 1992-04-16 2000-04-15 무라따 미치히로 Method of manufacturing electronic component and variable capacitor
US5367430A (en) * 1992-10-21 1994-11-22 Presidio Components, Inc. Monolithic multiple capacitor
FR2727583B1 (en) * 1994-11-29 1996-12-20 Commissariat Energie Atomique ELECTROSTATIC MOTOR AND ITS MANUFACTURING METHOD
TW391021B (en) * 1997-09-08 2000-05-21 Murata Manufacturing Co Variable capacitor
JP3387383B2 (en) * 1997-09-08 2003-03-17 株式会社村田製作所 Variable capacitor
JP3601397B2 (en) * 2000-02-08 2004-12-15 株式会社村田製作所 Method of manufacturing stator of variable capacitor and variable capacitor
KR20030017259A (en) * 2001-08-24 2003-03-03 이종신 trimmer condenser

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB726958A (en) * 1952-10-13 1955-03-23 Globe Union Inc Variable electrical capacitors
GB1513217A (en) * 1975-07-28 1978-06-07 Murata Manufacturing Co Variable capacitor
US4112480A (en) * 1977-07-08 1978-09-05 Johanson Manufacturing Corporation Tunable extended range chip capacitor

Also Published As

Publication number Publication date
JPS6011451B2 (en) 1985-03-26
DE2832809A1 (en) 1979-02-01
US4181923A (en) 1980-01-01
JPS5425459A (en) 1979-02-26
DE2832809C2 (en) 1983-06-16
CH621679B (en)

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