GB776558A - Improvements in or relating to mercury switches - Google Patents
Improvements in or relating to mercury switchesInfo
- Publication number
- GB776558A GB776558A GB2825854A GB2825854A GB776558A GB 776558 A GB776558 A GB 776558A GB 2825854 A GB2825854 A GB 2825854A GB 2825854 A GB2825854 A GB 2825854A GB 776558 A GB776558 A GB 776558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mercury
- plunger
- arc
- separator
- circuit
- 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
- H01H29/00—Switches having at least one liquid contact
- H01H29/18—Switches having at least one liquid contact with level of surface of contact liquid displaced by non-electrical contact-making plunger
Abstract
776,558. Mercury switches. JONES, D. G. Sept. 28, 1955 [Sept. 30, 1954], No. 28258/54. Class 38(5) The mercury in a sealed container 1 is divided into two pools 5 by an annular insulating separator 4, the circuit between the two electrodes 3 being completed by downward movement of an insulating plunger 6 to displace the mercury over the top of the separator. The plunger comprises a cylindrical inner part 7 and an annular outer part 8 having embedded therein an annuler electrode 10 connected to a conductor 11 having an extension 12 contacting the inner pool. The electrode 10 serves to reduce the field strength in the region of the interrupting arc. The concentric mercury pools produce a magnetic field tending to extinguish the arc and this effect may be enhanced by enclosing a magnetic ring in the top rim of the separator 4. Holes for the passage of the arc gases may be provided in the plunger parts 7, 8 near the mercury surface to further facilitate the arc extinction. An iron annulus 9 on the plunger permits it to be displaced by energization of a, coil 13 or by movement of a permanent magnet. In a modification (not shown) the mercury normally completes the circuit between the electrodes 3 and the plunger is raised to interrupt the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2825854A GB776558A (en) | 1954-09-30 | 1954-09-30 | Improvements in or relating to mercury switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2825854A GB776558A (en) | 1954-09-30 | 1954-09-30 | Improvements in or relating to mercury switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB776558A true GB776558A (en) | 1957-06-12 |
Family
ID=10272800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2825854A Expired GB776558A (en) | 1954-09-30 | 1954-09-30 | Improvements in or relating to mercury switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB776558A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816463A (en) * | 2020-07-22 | 2020-10-23 | 胡从勇 | Motor overheat protection equipment |
-
1954
- 1954-09-30 GB GB2825854A patent/GB776558A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816463A (en) * | 2020-07-22 | 2020-10-23 | 胡从勇 | Motor overheat protection equipment |
| CN111816463B (en) * | 2020-07-22 | 2022-11-25 | 国网湖北省电力有限公司襄阳供电公司 | Motor overheat protection equipment |
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