GB1483812A - Varistors - Google Patents
VaristorsInfo
- Publication number
- GB1483812A GB1483812A GB41268/74A GB4126874A GB1483812A GB 1483812 A GB1483812 A GB 1483812A GB 41268/74 A GB41268/74 A GB 41268/74A GB 4126874 A GB4126874 A GB 4126874A GB 1483812 A GB1483812 A GB 1483812A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grains
- coating
- sept
- varistors
- contact
- 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
- 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
Abstract
1483812 Varistors GENERAL ELECTRIC CO 23 Sept 1974 [27 Sept 1973] 41268/74 Heading H1K In order to enhance adhesion of a contact 13 to a varistor body 11 and coating 12, the coating 12 includes grains of particulate material 19, 20. As shown, some of the grains 19 protrude beyond the coating surface to present a roughened surface for contact deposition. The grains 19, 20 may be of the reaction product of additives to the main component, ZnO, of the body 11, which include oxides of Bi, Co, Ti and Mn. The coating 12 also includes a volatile liquid vehicle and compounds of Bi, B, Si and Sb. The coating is heated to 600-1000‹ C.-low enough not to melt the grains 19, 20. Contacts 13 (14) (Fig. 1, not shown) are applied of Ag paste or by a metallic flame spray. The grains 19, 20 may alternatively be of Al 2 O 3 .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US401307A US3903494A (en) | 1973-09-27 | 1973-09-27 | Metal oxide varistor with coating that enhances contact adhesion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1483812A true GB1483812A (en) | 1977-08-24 |
Family
ID=23587195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB41268/74A Expired GB1483812A (en) | 1973-09-27 | 1974-09-23 | Varistors |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3903494A (en) |
| JP (1) | JPS5623283B2 (en) |
| CA (1) | CA1020288A (en) |
| DE (1) | DE2445626C2 (en) |
| FR (1) | FR2246032B1 (en) |
| GB (1) | GB1483812A (en) |
| IE (1) | IE40005B1 (en) |
| IT (1) | IT1022210B (en) |
| SE (1) | SE395560B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4198443A (en) * | 1978-05-26 | 1980-04-15 | General Electric Company | Sinterless zinc oxide varistor devices |
| US4371860A (en) * | 1979-06-18 | 1983-02-01 | General Electric Company | Solderable varistor |
| US4460623A (en) * | 1981-11-02 | 1984-07-17 | General Electric Company | Method of varistor capacitance reduction by boron diffusion |
| US4538347A (en) * | 1984-06-18 | 1985-09-03 | Gte Laboratories Incorporated | Method for making a varistor package |
| US6279811B1 (en) * | 2000-05-12 | 2001-08-28 | Mcgraw-Edison Company | Solder application technique |
| US6735068B1 (en) | 2001-03-29 | 2004-05-11 | Mcgraw-Edison Company | Electrical apparatus employing one or more housing segments |
| US7839257B2 (en) * | 2005-08-05 | 2010-11-23 | Kiwa Spol. S.R.O. | Overvoltage protection with status signalling |
| US20080012127A1 (en) * | 2006-06-28 | 2008-01-17 | Inpaq Technology Co., Ltd. | Insulation structure for multilayer passive elements and fabrication method thereof |
| US7741946B2 (en) * | 2007-07-25 | 2010-06-22 | Thinking Electronics Industrial Co., Ltd. | Metal oxide varistor with heat protection |
| JP5248374B2 (en) * | 2009-03-13 | 2013-07-31 | 新光電気工業株式会社 | 3-pole surge arrester |
| US8836464B2 (en) * | 2009-06-24 | 2014-09-16 | Ceramate Technical Co., Ltd. | Explosion-proof and flameproof ejection type safety surge-absorbing module |
| US20100328016A1 (en) * | 2009-06-24 | 2010-12-30 | Robert Wang | Safe surge absorber module |
| US9165702B2 (en) * | 2011-03-07 | 2015-10-20 | James P. Hagerty | Thermally-protected varistor |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE635491C (en) * | 1933-07-25 | 1936-09-18 | Aeg | Resistor for surge arresters composed of conductive materials and binding agents |
| NL39212C (en) * | 1933-07-26 | |||
| DE688073C (en) * | 1934-10-27 | 1940-02-12 | Ellinger & Geissler Fabrik Ele | Process for the production of metallic end or intermediate contacts on carbon-containing semiconductor layers for fixed and variable resistances |
| US2501322A (en) * | 1946-11-07 | 1950-03-21 | Westinghouse Electric Corp | Moisture-resistant lightning arrester valve block |
| US3069294A (en) * | 1954-06-03 | 1962-12-18 | Corning Glass Works | Electrical metal oxide resistor having a glass enamel coating |
| DE1046154B (en) * | 1956-03-29 | 1958-12-11 | Siemens Ag | Electrical sheet resistance with metal layer used for contacting |
| JPS521113B1 (en) * | 1966-05-16 | 1977-01-12 | ||
| CA831691A (en) * | 1967-10-09 | 1970-01-06 | Matsuoka Michio | Non-linear resistors of bulk type |
| US3512057A (en) * | 1968-03-21 | 1970-05-12 | Teledyne Systems Corp | Semiconductor device with barrier impervious to fast ions and method of making |
-
1973
- 1973-09-27 US US401307A patent/US3903494A/en not_active Expired - Lifetime
-
1974
- 1974-08-19 CA CA207,348A patent/CA1020288A/en not_active Expired
- 1974-08-26 IE IE1766/74A patent/IE40005B1/en unknown
- 1974-09-23 IT IT27581/74A patent/IT1022210B/en active
- 1974-09-23 GB GB41268/74A patent/GB1483812A/en not_active Expired
- 1974-09-25 SE SE7412080A patent/SE395560B/en not_active IP Right Cessation
- 1974-09-25 DE DE2445626A patent/DE2445626C2/en not_active Expired
- 1974-09-26 FR FR7432405A patent/FR2246032B1/fr not_active Expired
- 1974-09-26 JP JP11004474A patent/JPS5623283B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5076590A (en) | 1975-06-23 |
| FR2246032B1 (en) | 1983-04-15 |
| IE40005L (en) | 1975-03-27 |
| CA1020288A (en) | 1977-11-01 |
| DE2445626A1 (en) | 1975-04-03 |
| DE2445626C2 (en) | 1986-09-18 |
| IE40005B1 (en) | 1979-02-14 |
| IT1022210B (en) | 1978-03-20 |
| JPS5623283B2 (en) | 1981-05-30 |
| FR2246032A1 (en) | 1975-04-25 |
| US3903494A (en) | 1975-09-02 |
| SE395560B (en) | 1977-08-15 |
| SE7412080L (en) | 1975-04-01 |
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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 |