GB277158A - Improvements in or relating to electric switches - Google Patents
Improvements in or relating to electric switchesInfo
- Publication number
- GB277158A GB277158A GB2003926A GB2003926A GB277158A GB 277158 A GB277158 A GB 277158A GB 2003926 A GB2003926 A GB 2003926A GB 2003926 A GB2003926 A GB 2003926A GB 277158 A GB277158 A GB 277158A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- circuit
- coil
- contacts
- switches
- 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
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Motor And Converter Starters (AREA)
Abstract
277,158. General Electric Co., Ltd., Kinnes, A., and Hunt, M. S. H. Aug. 13, 1926. Electromagnetic switches; sparking, preventing.-In the manufacture of switches the contacts of which are enclosed in a highly evacuated envelope, the faces of the contacts are heated while the envelope is being evacuated, thus removing occluded gases. The heating is preferably effected by repeatedly breaking a circuit at the contacts. The Figure shows the way in which this may be done for an electromagnetic switch 1 of the kind described in Specification 271,235. The switch 1 together with auxiliary switches 2, 7 may be closed by energizing coils 8, 9, 10 respectively. A motor 13 drives a slip ring 14 and segments 15, 16 which lead the current from a negative D.C. source to coils 10, 9 respectively, the arrangement being such that the circuit to coil 9 is always broken just after the circuit to coil 10. The energization of coil 10 closes switch 7 and through it a circuit to coil 8 whereby switch 1 is closed, so that at every revolution of the motor switch 1 opens just before switch 2. A heavy current, e.g. 100 per cent overload is passed through the switch 1 first in one direction and then in the other, and should this not open, the circuit through it is at once broken by switch 2. The Provisional Specification states that the heating of the contacts may be effected by electric bombardment.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL23116D NL23116C (en) | 1926-08-13 | ||
| GB2003926A GB277158A (en) | 1926-08-13 | 1926-08-13 | Improvements in or relating to electric switches |
| FR636857D FR636857A (en) | 1926-08-13 | 1927-06-30 | Improvements to electrical switches |
| DEG70651D DE506448C (en) | 1926-08-13 | 1927-07-02 | Method for degassing contacts enclosed in a highly evacuated housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2003926A GB277158A (en) | 1926-08-13 | 1926-08-13 | Improvements in or relating to electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB277158A true GB277158A (en) | 1927-09-15 |
Family
ID=10139340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2003926A Expired GB277158A (en) | 1926-08-13 | 1926-08-13 | Improvements in or relating to electric switches |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE506448C (en) |
| FR (1) | FR636857A (en) |
| GB (1) | GB277158A (en) |
| NL (1) | NL23116C (en) |
-
0
- NL NL23116D patent/NL23116C/xx active
-
1926
- 1926-08-13 GB GB2003926A patent/GB277158A/en not_active Expired
-
1927
- 1927-06-30 FR FR636857D patent/FR636857A/en not_active Expired
- 1927-07-02 DE DEG70651D patent/DE506448C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE506448C (en) | 1930-09-03 |
| NL23116C (en) | |
| FR636857A (en) | 1928-04-18 |
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