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GB1483811A - Varistors - Google Patents

Varistors

Info

Publication number
GB1483811A
GB1483811A GB42154/74A GB4215474A GB1483811A GB 1483811 A GB1483811 A GB 1483811A GB 42154/74 A GB42154/74 A GB 42154/74A GB 4215474 A GB4215474 A GB 4215474A GB 1483811 A GB1483811 A GB 1483811A
Authority
GB
United Kingdom
Prior art keywords
additives
metal oxide
sept
varistors
coating
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
GB42154/74A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1483811A publication Critical patent/GB1483811A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)

Abstract

1483811 Varistors GENERAL ELECTRIC CO 27 Sept 1974 [27 Sept 1973] 42154/74 Heading H1K A metal oxide varistor 10 has a body 11 formed from a metal oxide and a plurality of additives and a passivating coating 12 formed from at least some of these additives. The additives are reacted together to form a product which is added to a carrier substance, e.g. a compound of Bi, B, Sb or Si. The additives may be the oxides of Bi, Co, Mn and Ti and the metal oxide is ZnO. After applying the coating, the body is heated to fuse the carrier substances but without melting the reaction product of the additives. Finally, metallic contacts 13 (14) (Fig. 1, not shown) are applied from Ag paste or by a metallic flame spray.
GB42154/74A 1973-09-27 1974-09-27 Varistors Expired GB1483811A (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 (1)

Publication Number Publication Date
GB1483811A true GB1483811A (en) 1977-08-24

Family

ID=23587321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42154/74A Expired GB1483811A (en) 1973-09-27 1974-09-27 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
IE39769L (en) 1975-03-27
SE7412082L (en) 1975-04-01
IE39769B1 (en) 1978-12-20
CA1011884A (en) 1977-06-07
IT1022209B (en) 1978-03-20
DE2445659C2 (en) 1982-09-09
FR2246034A1 (en) 1975-04-25
DE2445659A1 (en) 1975-04-03
SE395561B (en) 1977-08-15
JPS563644B2 (en) 1981-01-26
FR2246034B1 (en) 1981-08-21
US3857174A (en) 1974-12-31
JPS5076588A (en) 1975-06-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee