GB1378167A - Sensor for liquids particularly suitable for use with plant irrigation systems - Google Patents
Sensor for liquids particularly suitable for use with plant irrigation systemsInfo
- Publication number
- GB1378167A GB1378167A GB5611071A GB5611071A GB1378167A GB 1378167 A GB1378167 A GB 1378167A GB 5611071 A GB5611071 A GB 5611071A GB 5611071 A GB5611071 A GB 5611071A GB 1378167 A GB1378167 A GB 1378167A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sprinkler
- float
- water
- sensor
- particularly suitable
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane
- H01H35/405—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane the switch being of the reed switch type
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
1378167 Magnetic switches G PEARCE [trading as ACCESS] 22 Nov 1972 [2 Dec 1971] 56110/71 Heading H1N A magnetic switch for controlling a greenhouse sprinkler system receives water which accumulates in its hollow vessel 5 to lift a float having a permanent magnet 23 which cooperates with a reed contact device 15 in the sprinkler control circuit (Fig. 5, not shown). When the float is raised, to effect turning off of the sprinkler control circuit, water-evaporation from a wick 29, which can be adjusted to alter the evaporation rate, proceeds until the float falls to a level at which the contacts operate to restart the water sprinkler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5611071A GB1378167A (en) | 1972-11-22 | 1972-11-22 | Sensor for liquids particularly suitable for use with plant irrigation systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5611071A GB1378167A (en) | 1972-11-22 | 1972-11-22 | Sensor for liquids particularly suitable for use with plant irrigation systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1378167A true GB1378167A (en) | 1974-12-27 |
Family
ID=10475751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5611071A Expired GB1378167A (en) | 1972-11-22 | 1972-11-22 | Sensor for liquids particularly suitable for use with plant irrigation systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1378167A (en) |
-
1972
- 1972-11-22 GB GB5611071A patent/GB1378167A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
| PCNP | Patent ceased through non-payment of renewal fee |