GB978973A - Improvements in and relating to vacuum electric switches - Google Patents
Improvements in and relating to vacuum electric switchesInfo
- Publication number
- GB978973A GB978973A GB23647/61A GB2364761A GB978973A GB 978973 A GB978973 A GB 978973A GB 23647/61 A GB23647/61 A GB 23647/61A GB 2364761 A GB2364761 A GB 2364761A GB 978973 A GB978973 A GB 978973A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- electrodes
- arcing
- parts
- conditioned
- 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
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
- H01H33/6646—Contacts; Arc-extinguishing means, e.g. arcing rings having non flat disc-like contact surface
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
978,973. Vacuum switches. ENGLISH ELECTRIC CO. Ltd. June 13, 1962 [June 30, 1961], No. 23647/61. Heading H2B. In a vacuum switch parts of the contacts are " current conditioned " by arc discharges under vacuum and the arcing during operation of the switch is restricted to the conditioned areas by stabilizing electrodes between parts of the contacts which have not been conditioned, the electrodes being made of a material having an arcdischarge voltage greater than half the maximum discharge voltage than can occur between the contacts. In Fig. 1 the fixed and moving contacts 10, 11 are surrounded by a cylindrical metal electrode 13 which is insulated from the contacts and has an annular extension 13a which assists in limiting the arcing to the conditional area of the contacts. In Fig. 3 the moving contact 17 engages the final contact 16 in two extreme positions and the electrodes 20, 20<SP>1</SP> have annular extensions 20a. The contacts may be of copper and the electrodes of tungsten or molybdenum or alternatively the electrodes may include " getter " material such as tantalum, zirconium or titanium and have a corrugated surface. The cylinder 13 or plates 20 may be extended to shield other parts of the switch from " line of sight " arcing.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB23647/61A GB978973A (en) | 1961-06-30 | 1961-06-30 | Improvements in and relating to vacuum electric switches |
DEE23110A DE1191461B (en) | 1961-06-30 | 1962-06-28 | Electric vacuum switch |
CH780562A CH396143A (en) | 1961-06-30 | 1962-06-28 | Electric vacuum switch |
FR996263A FR1423919A (en) | 1961-06-30 | 1964-11-25 | Electric vacuum switch |
US449246A US3270172A (en) | 1961-06-30 | 1965-04-19 | Switch having an arc stabilizing electrode |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB23647/61A GB978973A (en) | 1961-06-30 | 1961-06-30 | Improvements in and relating to vacuum electric switches |
Publications (1)
Publication Number | Publication Date |
---|---|
GB978973A true GB978973A (en) | 1965-01-01 |
Family
ID=10199018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23647/61A Expired GB978973A (en) | 1961-06-30 | 1961-06-30 | Improvements in and relating to vacuum electric switches |
Country Status (4)
Country | Link |
---|---|
US (1) | US3270172A (en) |
CH (1) | CH396143A (en) |
DE (1) | DE1191461B (en) |
GB (1) | GB978973A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1065886A (en) * | 1963-10-11 | 1967-04-19 | Ass Elect Ind | Improvements relating to vacuum-switch contacts |
US3592987A (en) * | 1968-03-19 | 1971-07-13 | Westinghouse Electric Corp | Gettering arrangements for vacuum-type circuit interrupters comprising fibers of gettering material embedded in a matrix of material of good conductivity |
US3590197A (en) * | 1968-10-31 | 1971-06-29 | Allis Chalmers Mfg Co | Electrical contacts containing gettering material |
US3575564A (en) * | 1969-09-10 | 1971-04-20 | Allis Chalmers Mfg Co | Vacuum-type electric circuit interrupter |
US4021628A (en) * | 1975-01-20 | 1977-05-03 | Westinghouse Electric Corporation | Vacuum fault current limiter |
US4135071A (en) * | 1976-03-17 | 1979-01-16 | General Electric Company | Vacuum circuit interrupter with disc-shaped beryllium contacts |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1784302A (en) * | 1926-11-15 | 1930-12-09 | California Inst Of Techn | Process for conditioning electric switches |
DE596966C (en) * | 1930-05-28 | 1934-05-14 | Aeg | Device for vacuum switch for degassing the contacts |
DE565530C (en) * | 1930-09-07 | 1932-12-01 | Siemens Ag | Vacuum switch |
DE643192C (en) * | 1933-02-19 | 1937-03-31 | Siemens Schuckertwerke Akt Ges | Electric switch |
DE603883C (en) * | 1933-03-23 | 1934-10-10 | Bbc Brown Boveri & Cie | Switching arrangement |
BE412834A (en) * | 1934-12-18 | |||
IT570073A (en) * | 1956-04-17 | |||
US2976382A (en) * | 1959-06-29 | 1961-03-21 | Gen Electric | Arc extinguishing structure for an electric circuit interrupter |
US3014110A (en) * | 1959-10-29 | 1961-12-19 | Gen Electric | Alternating current vacuum circuit interrupter |
US7792742B1 (en) * | 1999-08-27 | 2010-09-07 | Federal Home Loan Mortgage Corporation | Risk-based reference pool capital reducing systems and methods |
-
1961
- 1961-06-30 GB GB23647/61A patent/GB978973A/en not_active Expired
-
1962
- 1962-06-28 DE DEE23110A patent/DE1191461B/en active Pending
- 1962-06-28 CH CH780562A patent/CH396143A/en unknown
-
1965
- 1965-04-19 US US449246A patent/US3270172A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CH396143A (en) | 1965-07-31 |
DE1191461B (en) | 1965-04-22 |
US3270172A (en) | 1966-08-30 |
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