GB514759A - Improvements in and relating to electric gas blast switches - Google Patents
Improvements in and relating to electric gas blast switchesInfo
- Publication number
- GB514759A GB514759A GB16558/38A GB1655838A GB514759A GB 514759 A GB514759 A GB 514759A GB 16558/38 A GB16558/38 A GB 16558/38A GB 1655838 A GB1655838 A GB 1655838A GB 514759 A GB514759 A GB 514759A
- Authority
- GB
- United Kingdom
- Prior art keywords
- elements
- contact
- blast
- operating
- current
- 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
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/38—Plug-and-socket contacts
- H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
514,759. Gas - blast switches. BRITISH THOMSON-HOUSTON CO., Ltd. June 2, 1938, No. 16558. Convention date, June 5, 1937. [Class 38 (v)] The fixed contact of a gas-blast switch comprises contact-elements so individually mounted and arranged that, on opening the switch, they separate to form at the point at which the arc is struck an opening of greater cross-section than that of the movable contact. Thus, in the closed position, gas leakage is minimized, and during opening the maximum blast-area is available. The fixed contact of Fig. 2 comprises elements 1 supported within a nozzle formed by elements 8, 28, the elements being pivoted to operating levers 2, which may be resilient but, as shown, are urged by springs 4 so as to bear at their lower ends against the widened part of the movable contact 6. When the latter is lowered to open circuit, the shoulder 7 allows the elements 1 to be forced outwards by springs 5, so providing an enlarged outlet for the upflowing blast. The arc formed is blown from elements 1 on to the member 8 and thence to arcing-contact 9. In Fig. 3, contact elements 1 arranged as in Specification 494,829, are provided with springs 16 to press them against the movable contact 6 and, at their bearing surfaces 10, against the retaining wall 11. A castellated operating-member 12 is provided, the upward projections of which, when the member 12 is rotated clockwise by the operating member for contact 6, engage the elements to move them outwards. In Fig. 5 (not shown), the elements 1 are slidable on current-conducting ball-bearings and the elements 2 are resilient. In other forms, Figs. 6-9 (not shown), the nozzle 28 closely surrounds the movable contact, and a modified linkage is provided. Separation of elements 1 may be effected just before, or at, current-zero, as by locking the levers 2 by a device which is released at current-zero, or by operating the member 12 of Fig. 3 by a spring or weight set into operation by zero-current responsive means.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE514759X | 1937-06-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB514759A true GB514759A (en) | 1939-11-16 |
Family
ID=6548756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16558/38A Expired GB514759A (en) | 1937-06-05 | 1938-06-02 | Improvements in and relating to electric gas blast switches |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB514759A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3271548A (en) * | 1963-10-11 | 1966-09-06 | Westinghouse Electric Corp | Contact constructions for circuit interrupters |
-
1938
- 1938-06-02 GB GB16558/38A patent/GB514759A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3271548A (en) * | 1963-10-11 | 1966-09-06 | Westinghouse Electric Corp | Contact constructions for circuit interrupters |
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