GB392926A - Improvements in electrical switches or circuit breakers - Google Patents
Improvements in electrical switches or circuit breakersInfo
- Publication number
- GB392926A GB392926A GB32025/31A GB3202531A GB392926A GB 392926 A GB392926 A GB 392926A GB 32025/31 A GB32025/31 A GB 32025/31A GB 3202531 A GB3202531 A GB 3202531A GB 392926 A GB392926 A GB 392926A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- contacts
- housing
- fluid
- arcing
- 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
- 239000012530 fluid Substances 0.000 abstract 8
- 239000002184 metal Substances 0.000 abstract 4
- 230000004048 modification Effects 0.000 abstract 3
- 238000012986 modification Methods 0.000 abstract 3
- 238000000926 separation method Methods 0.000 abstract 3
- 230000004888 barrier function Effects 0.000 abstract 2
- 230000008033 biological extinction Effects 0.000 abstract 2
- 241001635598 Enicostema Species 0.000 abstract 1
- 206010027626 Milia Diseases 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F9/00—Devices preventing sparking of machines or apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
- B23D49/007—Jig saws, i.e. machine saws with a vertically reciprocating narrow saw blade chucked at both ends for contour cutting
- B23D49/008—Jig saws, i.e. machine saws with a vertically reciprocating narrow saw blade chucked at both ends for contour cutting hand-driven or foot-driven
-
- 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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/92—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being liquid, e.g. oil
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- Circuit Breakers (AREA)
- Gas-Insulated Switchgears (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
392,926. Heavy-current switches. WHITEHEAD, G. E. and WHITEHEAD'S ELECTRICAL INVENTIONS, Ltd., 38, Rhiwbina Hill, Rhiwbina, near Cardiff. Nov. 18, 1931, Nos. 32025/31 and 17535/32. [Class 38 (v).] In switches in which a fluid blast between the contacts is produced on their separation contact is broken within a metal housing or arcing chamber enclosing the actual contacting surfaces and arranged with an entry mouth and at least one moderately restricted opening through which the fluid can escape, the housing being further so arranged that before, at, and, after the instant of contact separation, immersion fluid can flow through said entry mouth about the actual surfaces of contact and out through the gas escape openings without appreciable restriction by the contacts, whilst constraining means such as a barrier and tubes surrounding the contacts are associated with the entry mouth in such a manner that upon tripping the switch or circuit-breaker the fluid is adapted to flow into the entry mouth to produce an appreciable pressure within the housing for effecting the rapid extinction of the arc. As shown in Fig. 1, the arcing contacts consist of plug members 5 engaged by angularlyspaced contact fingers 3 which project inwardly through the sides of a metal housing 21. The fluid pressure is produced by a piston 12 in a cylinder 11 which on opening of the switch drives fluid from below the insulating barrier 10 upwardly through the contact housings which are each provided with one or more relief outlets 22. As shown in the detailed view of the contact structure in Fig. 2, the entry mouth 20 of the contact housing is tapered so that the plug contact is separated near its contacting portions by a narrow annular passage for the flow of insulating fluid and thus during operation of the circuit-breaker the oil can flow freely through the contact and housing in the neighbourhood of the arc, so producing a rapid extinction of the arc drawn between the separating contacts. The presence of large metal surfaces adjacent the separating contacts cools and restricts the arcing. The housing 21 is attached to the leading-in conductor 23 and is mounted within an insulating shrouding tube 9 in an oiltight manner. The contact fingers 3 are secured to arms 25 spring mounted upon studs 27 and provided with hemispherical pivotal end pieces 26 bearing on corresponding seatings to enable the contact fingers to bear evenly on the sides of the movable arcing contact 5. In the modified form of contact shown in Fig. 5 a hexagonal contact rod formation is employed and contact fingers 3 are mounted to engage alternate faces of the rod. The arcing housing in this arrangement is constituted by a cage-like structure consisting of the contact finger supports 25 and of metal strips 36 intermediate the contact fingers, the strips 36 supporting a mouth ring 24. In a further modification, Fig. 6 (not shown), the mouth ring is formed of segments normally pressed apart by an enlarged portion of the plug 5 so that when the contacts are in engagement passages are formed between the segments by which the flow of oil or other insulating fluid may take place into the arcing housing. During the separation of the contacts in this modification, the mouth ring contracts, but a passage for the flow of oil &c. still exists between its internal bore and the reduced tip of the contact rod 5. In a further modification of a switch arranged as shown in Fig. 1, the relatively fixed'contacts with their associated parts are arranged to be movable within the tank for isolating purposes. Specifications 286,429, [Class 38 (v), Electric switches &c.], 350,529, 350,915, 351,253, 372,027, 376,300, 388,509, and 392,930 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1992109X | 1931-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB392926A true GB392926A (en) | 1933-05-18 |
Family
ID=10895493
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4859/33A Expired GB392930A (en) | 1931-11-18 | 1931-11-18 | Improvements in electrical switches or circuit breakers and in the co-operating contacts thereof |
GB32025/31A Expired GB392926A (en) | 1931-11-18 | 1931-11-18 | Improvements in electrical switches or circuit breakers |
GB3771/33A Expired GB412673A (en) | 1931-11-18 | 1933-02-07 | Improvements in electrical switches or circuit breakers |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4859/33A Expired GB392930A (en) | 1931-11-18 | 1931-11-18 | Improvements in electrical switches or circuit breakers and in the co-operating contacts thereof |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3771/33A Expired GB412673A (en) | 1931-11-18 | 1933-02-07 | Improvements in electrical switches or circuit breakers |
Country Status (5)
Country | Link |
---|---|
US (1) | US1992109A (en) |
BE (2) | BE401277A (en) |
DE (2) | DE621297C (en) |
FR (2) | FR768027A (en) |
GB (3) | GB392930A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2422569A (en) * | 1943-05-28 | 1947-06-17 | Westinghouse Electric Corp | Circuit interrupter |
US2467788A (en) * | 1944-07-20 | 1949-04-19 | Westinghouse Electric Corp | Circuit interrupter |
DE1142650B (en) * | 1957-06-03 | 1963-01-24 | Elettromeccaniche Scarpa & Mag | Tulip contact, especially for extinguishing chamber switches |
US3894204A (en) * | 1974-02-19 | 1975-07-08 | Ite Imperial Corp | 38KV low current fused switch |
DE102013205945A1 (en) * | 2013-04-04 | 2014-10-09 | Siemens Aktiengesellschaft | Disconnecting switch device |
ES2941310T3 (en) * | 2018-03-28 | 2023-05-19 | Hitachi Energy Switzerland Ag | Spring-loaded auxiliary contact system for bus transfer switching in a central breaker |
-
0
- BE BE391064D patent/BE391064A/xx unknown
- BE BE401277D patent/BE401277A/xx unknown
- FR FR743261D patent/FR743261A/fr not_active Expired
-
1931
- 1931-11-18 GB GB4859/33A patent/GB392930A/en not_active Expired
- 1931-11-18 GB GB32025/31A patent/GB392926A/en not_active Expired
-
1932
- 1932-09-07 US US632073A patent/US1992109A/en not_active Expired - Lifetime
- 1932-09-20 DE DEW89921D patent/DE621297C/en not_active Expired
-
1933
- 1933-02-07 GB GB3771/33A patent/GB412673A/en not_active Expired
-
1934
- 1934-01-19 FR FR768027D patent/FR768027A/en not_active Expired
- 1934-02-01 DE DEW93563D patent/DE658260C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE658260C (en) | 1938-03-25 |
GB412673A (en) | 1934-07-05 |
FR768027A (en) | 1934-07-30 |
DE621297C (en) | 1935-11-05 |
US1992109A (en) | 1935-02-19 |
FR743261A (en) | 1933-03-25 |
GB392930A (en) | 1933-05-18 |
BE391064A (en) | |
BE401277A (en) |
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