GB853617A - Improved safety device for apparatus immersed in a tank - Google Patents
Improved safety device for apparatus immersed in a tankInfo
- Publication number
- GB853617A GB853617A GB2772/57A GB277257A GB853617A GB 853617 A GB853617 A GB 853617A GB 2772/57 A GB2772/57 A GB 2772/57A GB 277257 A GB277257 A GB 277257A GB 853617 A GB853617 A GB 853617A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- tube
- tank
- vessel
- valve
- 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
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Level Indicators Using A Float (AREA)
Abstract
853,617. Fluid actuation of switches. COMPAGNIE FRANCAISE THOMSON-HOUSTON. Jan. 25, 1957 [Jan. 25, 1956], No. 2772/57. Class 38 (5). A tank partially filled with liquid for cooling apparatus immersed therein is combined with a safety device having means responsive to a fall in liquid level in the tank below a predetermined point to operate an alarm and/or protective control for the apparatus, and means responsive to an increase in pressure of the gas above the liquid to operate the alarm and/or protective control and/or release of the excess gas pressure. The apparatus in the tank may be a transformer or the electronic tube described in Specification 706,209. As shown, the safety device comprises a float 1 fixed to a tube 7 which is open at its lower end to the liquid in the tank 3 and which opens at its upper end into a vessel 4. The lid 5 of the vessel 4 is connected by a rod 19 to a mercury switch 18. The tube 7 is vertically slidable within the boss 12 of a valve 8 which rests on a seat 9. If the liquid level falls, the corresponding downward movement of the float causes actuation of the switch 18 via the tube 7 and the rod 19. If the liquid level rises, the liquid passes up through a clearance space 11 between the tube 7 and the valve 8 and through a bore 9<SP>1</SP> in the valve to an outlet 25. An increase in pressure of the gas above the liquid forces liquid up the tube 7 into the vessel 4 until the weight of liquid in the vessel overcomes the buoyancy of the float and the rod 19 pulls the switch 19 down to actuate it. A large increase in gas pressure causes the valve 8 to lift from its seat 9 and vent some of the gas through the aperture 15.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR853617X | 1956-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB853617A true GB853617A (en) | 1960-11-09 |
Family
ID=9327155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2772/57A Expired GB853617A (en) | 1956-01-25 | 1957-01-25 | Improved safety device for apparatus immersed in a tank |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB853617A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2154799A (en) * | 1984-02-18 | 1985-09-11 | Lucas Ind Plc | Liquid level indicator |
-
1957
- 1957-01-25 GB GB2772/57A patent/GB853617A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2154799A (en) * | 1984-02-18 | 1985-09-11 | Lucas Ind Plc | Liquid level indicator |
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