EP0063685B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid-level measuring system
Assignee: ITT Inc
•
Filing: 1982-03-10
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Granted: 1986-06-11
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Expires: 2002-03-10
Abstract
No abstract record available.
Inventors
- 👤 Victor Nicholas Lawford
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:27
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
200 words
Liquid level measuring system (10') for closed containers (12') with a differential pressure measuring device (26') disposed at the level of the lower zone of the container, to which device an indicating device (38') for indicating measured values is connected and which device is connected via a pipe (34') - a so-called "reference column" - to a sensor housing (32') disposed at the level of the upper zone of the container, which housing is divided by a bellows spring (40) into a first chamber (42) and a second chamber (44), the second chamber (44) and the pipe (34') opening into it and leading to the differential pressure measuring device being filled with an incompressible liquid, characterised in that there is disposed in the second chamber (44) a float (50) which dips in a freely movable manner with a pin (52) attached to its underside vertically into the pipe (34') referred to as the "reference column", that the float, after sinking down, seals the mouth of the pipe (34') leading from the sensor housing (32') to the differential pressure measuring device (26'), a permanent magnet (70) attached to the pin (52) then actuating a switch (62) fitted outside the pipe (34').
Claim 2
Dependent Claim
200 words
Liquid level measuring system (10') for closed containers (12') with a differential pressure measuring device (26') disposed at the level of the lower zone of the container, to which device an indicating device (38') for indicating measured values is connected and which device is connected via a pipe (34') - a so-called "reference column" - to a sensor housing (32') disposed at the level of the upper zone of the container, which housing is divided by a bellows spring (40) into a first chamber (42) and a second chamber (44), the second chamber (44) and the pipe (34') opening into it and leading to the differential pressure measuring device being filled with an incompressible liquid, characterised in that there is disposed in the second chamber (44) a float (50) which dips in a freely movable manner with a pin (52) attached to its underside vertically into the pipe (34') referred to as the "reference column", that the float, after sinking down, seals the mouth of the pipe (34') leading from the sensor housing (32') to the differential pressure measuring device (26'), a permanent magnet (70) attached to the pin (52) then actuating a switch (62) fitted outside the pipe (34').
Claim 3
Dependent Claim
38 words
A liquid level measuring device as claimed in Claim 1, characterised in that the bellows spring (40) has a lip edge (48) which is attached to the base-plate (30') of the sensor housing (32') in a liquid-tight manner.
Claim 4
Dependent Claim
46 words
A liquid level measuring system as claimed in Claim 2, characterised in that there is attached above the lip edge (48) of the bellows spring (40) a cage (54) whose flanges (56) limit the buoyancy movement of the float (50) in the liquid-filled bellows spring (40).
Claim 5
Dependent Claim
29 words
A liquid level measuring system as claimed in Claim 1, characterised in that the float (50) consists of a thinwalled metal housing which is filled with a plastic foam.
Claim 6
Dependent Claim
72 words
A liquid level measuring system as claimed in Claim 1, characterised in that the sealing of the mouth of the pipe (34') is effected by a soft elastic 0 ring (58) attached to the float (50), which ring (58) is disposed with part of its cross-section in a groove (60) on the underside of the float (50) and lays itself against the inside of the base-plate (30') of the sensor housing (32').
Claim 7
Dependent Claim
45 words
A liquid level measuring system as claimed in Claim 1, characterised in that the switch (62) fitted on the outside of the pipe (34') is an encapsulated reed switch whose reeds (64, 66) are influenced by the field of force of the permanent magnet (70).
Claim 8
Dependent Claim
32 words
A liquid level measuring system as claimed in Claim 6, characterised in that the switch (62) is connected in series with an alarm device (72) which operates when the float (50) sinks.
References Cited (Backward Citations)
No citation records indexed.
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