GB490946A - Improvements relating to mercury switches - Google Patents
Improvements relating to mercury switchesInfo
- Publication number
- GB490946A GB490946A GB559737A GB559737A GB490946A GB 490946 A GB490946 A GB 490946A GB 559737 A GB559737 A GB 559737A GB 559737 A GB559737 A GB 559737A GB 490946 A GB490946 A GB 490946A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- vessel
- plunger
- mercury
- energization
- 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
Landscapes
- Electrotherapy Devices (AREA)
- Magnetic Treatment Devices (AREA)
Abstract
490,946. Mercury switches. CIANCHI, A. Feb. 24, 1937, Nos. 5597 and 19150. [Class 38 (v)] Energization of a coil 6 depresses plunger 4 to force mercury past a ball valve 7 to flow over the edge of vessel 3 into vessel 2 to complete a circuit between electrodes 8, 9. Energization of a coil 10 surrounding electrode 9 which is magnetic, draws valve 7 downwards to allow the mercury to return and break the circuit. Instead of having an outer vessel 2, the contact 8 may be arranged ina side limb of vessel 3. In a modification the plunger can be held in the depressed position by an external permanent magnet and released either by removing the magnet or by applying an opposing electromagnetic field. A changeover switch is described, in which a third electrode dips down inside the plunger which is provided with a valve in the manner described in Specification 453,229. Instead of releasing the valve by means of a solenoid, a time delay can be introduced by providing a small opening adjacent to or in the seating of the valve. The time delay may be varied by tilting the base on which the switch is mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB559737A GB490946A (en) | 1937-02-24 | 1937-02-24 | Improvements relating to mercury switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB559737A GB490946A (en) | 1937-02-24 | 1937-02-24 | Improvements relating to mercury switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB490946A true GB490946A (en) | 1938-08-24 |
Family
ID=9799086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB559737A Expired GB490946A (en) | 1937-02-24 | 1937-02-24 | Improvements relating to mercury switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB490946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1060957B (en) * | 1954-05-10 | 1959-07-09 | Eberle & Co Appbau Ges | Mercury switch tube with plunger for delayed switch-on and quick switch-off |
-
1937
- 1937-02-24 GB GB559737A patent/GB490946A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1060957B (en) * | 1954-05-10 | 1959-07-09 | Eberle & Co Appbau Ges | Mercury switch tube with plunger for delayed switch-on and quick switch-off |
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