GB866841A - Improvements in or relating to float-operated electric switch mechanism - Google Patents
Improvements in or relating to float-operated electric switch mechanismInfo
- Publication number
- GB866841A GB866841A GB3931358A GB3931358A GB866841A GB 866841 A GB866841 A GB 866841A GB 3931358 A GB3931358 A GB 3931358A GB 3931358 A GB3931358 A GB 3931358A GB 866841 A GB866841 A GB 866841A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- keeper
- float
- contact
- magnetic
- 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
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H36/02—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by movement of a float carrying a magnet
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
866,841. Magnetic switches. TEDDING- TON AIRCRAFT CONTROLS Ltd. Dec. 4, 1959 [Dec. 5, 1958], No. 39313/58. Class 38 (5). [Also in Group XVIII] In a float - operated switch having a contactcarrying permanent magnet repelled by a second permanent magnet on the float, a magnetic keeper between the magnets causes snap-action movement of the contact carrying magnet. The hollow float 4 is slidable in a perforated tube 3 secured to a body 1 threaded at 2 for securement in a tank. Flexible spiders 9 secured at their periphery by insulating rings 10 clamped to the body 1, carry a cylindrical magnet 8 which is coaxial with and opposed to the magnet 7 carried by the float. A contact ring 14 insulated from and carried by the magnet 8 cooperates with fixed contacts 15, 16, 17 on segments 18, 19 clamped to but insulated from the body 1. A sealed cover 20 encloses the contact chamber which is separated from the tube 3 by a wall 12 of the body 1 and by a thin saturable magnetic keeper 13. The magnet 8 is normally attracted to the keeper 13 and as the magnet 7 moves nearer to the keeper so that the gap between the keeper and magnet 7 becomes less than the gap between the keeper and the magnet 8 (dependent on the thickness of the wall 12), the magnet 8 is rapidly repelled upwards to close the contacts. When the magnet 7 is moved downwards the attraction between the magnet 8 and the keeper ensures rapid contact opening. A ballast chamber 6 on the float 4 may be weighted to set the operating level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3931358A GB866841A (en) | 1958-12-05 | 1958-12-05 | Improvements in or relating to float-operated electric switch mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3931358A GB866841A (en) | 1958-12-05 | 1958-12-05 | Improvements in or relating to float-operated electric switch mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB866841A true GB866841A (en) | 1961-05-03 |
Family
ID=10408884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3931358A Expired GB866841A (en) | 1958-12-05 | 1958-12-05 | Improvements in or relating to float-operated electric switch mechanism |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB866841A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2162690A (en) * | 1984-08-02 | 1986-02-05 | Lucas Electrical Electronics A | Magnetic switch for fluid level monitor |
-
1958
- 1958-12-05 GB GB3931358A patent/GB866841A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2162690A (en) * | 1984-08-02 | 1986-02-05 | Lucas Electrical Electronics A | Magnetic switch for fluid level monitor |
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