IE39769B1 - Improvements in varistors - Google Patents

Improvements in varistors

Info

Publication number
IE39769B1
IE39769B1 IE1769/74A IE176974A IE39769B1 IE 39769 B1 IE39769 B1 IE 39769B1 IE 1769/74 A IE1769/74 A IE 1769/74A IE 176974 A IE176974 A IE 176974A IE 39769 B1 IE39769 B1 IE 39769B1
Authority
IE
Ireland
Prior art keywords
body portion
metal oxide
passivating coating
preselected
additives
Prior art date
Application number
IE1769/74A
Other versions
IE39769L (en
Original Assignee
Gen Electric
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 by Gen Electric filed Critical Gen Electric
Publication of IE39769L publication Critical patent/IE39769L/en
Publication of IE39769B1 publication Critical patent/IE39769B1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/102—Varistor boundary, e.g. surface layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49099—Coating resistive material on a base
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49101—Applying terminal

Abstract

Disclosed is a metal oxide varistor comprising a body portion that is composed essentially of a metal oxide and a small percentage of a plurality of preselected additives. A passivating coating is applied to the body portion prior to the application of metallic contacts. The passivating coating includes at least some of the preselected additives in order to enhance device stability and insure compatibility therewith. [US3857174A]
IE1769/74A 1973-09-27 1974-08-26 Improvements in varistors IE39769B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00401334A US3857174A (en) 1973-09-27 1973-09-27 Method of making varistor with passivating coating

Publications (2)

Publication Number Publication Date
IE39769L IE39769L (en) 1975-03-27
IE39769B1 true IE39769B1 (en) 1978-12-20

Family

ID=23587321

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1769/74A IE39769B1 (en) 1973-09-27 1974-08-26 Improvements in varistors

Country Status (9)

Country Link
US (1) US3857174A (en)
JP (1) JPS563644B2 (en)
CA (1) CA1011884A (en)
DE (1) DE2445659C2 (en)
FR (1) FR2246034B1 (en)
GB (1) GB1483811A (en)
IE (1) IE39769B1 (en)
IT (1) IT1022209B (en)
SE (1) SE395561B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031498A (en) * 1974-10-26 1977-06-21 Kabushiki Kaisha Meidensha Non-linear voltage-dependent resistor
US4097834A (en) * 1976-04-12 1978-06-27 Motorola, Inc. Non-linear resistors
IE47121B1 (en) * 1977-07-29 1983-12-28 Gen Electric Stabilized varistor
DE2735484C2 (en) * 1977-08-05 1984-06-07 Siemens AG, 1000 Berlin und 8000 München Process for the production of thick film varistors with zinc oxide as the main component
US4148135A (en) * 1978-03-10 1979-04-10 General Electric Company Method of treating metal oxide varistors to reduce power loss
US5455554A (en) * 1993-09-27 1995-10-03 Cooper Industries, Inc. Insulating coating
DE19931056B4 (en) * 1999-07-06 2005-05-19 Epcos Ag Multilayer varistor of low capacity

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1483538A (en) * 1919-05-06 1924-02-12 Westinghouse Electric & Mfg Co Lightning arrester
DE471978C (en) * 1919-06-01 1929-02-20 Rudolf Schnabel Process for the production of ceramic electrical resistors
DE733726C (en) * 1937-09-12 1943-04-01 Siemens Ag Process for the production of metallized insulating foils
DE941300C (en) * 1943-05-01 1956-04-05 Siemens Ag Process to achieve greater surface conductivity at contact points of metallic layer resistors
US2501322A (en) * 1946-11-07 1950-03-21 Westinghouse Electric Corp Moisture-resistant lightning arrester valve block
DE1066654B (en) * 1955-09-30 1959-10-08
GB1037822A (en) * 1961-12-15 1966-08-03 Ass Elect Ind Improvements relating to non-linear electrical resistance elements
US3217281A (en) * 1962-05-28 1965-11-09 Corning Glass Works Electrical resistor
JPS521113B1 (en) * 1966-05-16 1977-01-12
CA831691A (en) * 1967-10-09 1970-01-06 Matsuoka Michio Non-linear resistors of bulk type
NL6901538A (en) * 1969-01-31 1970-08-04
DE2026011C3 (en) * 1970-05-22 1980-06-26 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka (Japan) Voltage dependent resistance
US3768058A (en) * 1971-07-22 1973-10-23 Gen Electric Metal oxide varistor with laterally spaced electrodes
JPS5240038B2 (en) * 1972-12-29 1977-10-08

Also Published As

Publication number Publication date
JPS5076588A (en) 1975-06-23
FR2246034A1 (en) 1975-04-25
IT1022209B (en) 1978-03-20
DE2445659C2 (en) 1982-09-09
IE39769L (en) 1975-03-27
CA1011884A (en) 1977-06-07
DE2445659A1 (en) 1975-04-03
SE395561B (en) 1977-08-15
SE7412082L (en) 1975-04-01
GB1483811A (en) 1977-08-24
FR2246034B1 (en) 1981-08-21
JPS563644B2 (en) 1981-01-26
US3857174A (en) 1974-12-31

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