GB1414308A - Liquid level control - Google Patents

Liquid level control

Info

Publication number
GB1414308A
GB1414308A GB1403172A GB1403172A GB1414308A GB 1414308 A GB1414308 A GB 1414308A GB 1403172 A GB1403172 A GB 1403172A GB 1403172 A GB1403172 A GB 1403172A GB 1414308 A GB1414308 A GB 1414308A
Authority
GB
United Kingdom
Prior art keywords
liquid level
level control
coil
division
oscillator
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
Application number
GB1403172A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB1403172A priority Critical patent/GB1414308A/en
Publication of GB1414308A publication Critical patent/GB1414308A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01F23/72—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 using magnetically actuated indicating means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means

Abstract

1414308 Liquid level measuring PLESSEY CO Ltd 2 Feb 1973 [24 March 1972] 14031/72 Heading G1N [Also in Division G3] In a liquid level controlling apparatus (see Division G3), the liquid level is measured using a hollow float having a ferrite slug mounted thereon, and a coil which is arranged in an oscillator whose frequency is determined by the position of the slug relative to the coil. The oscillator output is applied to a Schmitt trigger whose output is applied to a pump circuit which provides a D.C. voltage representative of liquid level.
GB1403172A 1972-03-24 1972-03-24 Liquid level control Expired GB1414308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1403172A GB1414308A (en) 1972-03-24 1972-03-24 Liquid level control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1403172A GB1414308A (en) 1972-03-24 1972-03-24 Liquid level control

Publications (1)

Publication Number Publication Date
GB1414308A true GB1414308A (en) 1975-11-19

Family

ID=10033744

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1403172A Expired GB1414308A (en) 1972-03-24 1972-03-24 Liquid level control

Country Status (1)

Country Link
GB (1) GB1414308A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0409349A1 (en) * 1989-07-19 1991-01-23 Sara Lee/De N.V. Apparatus for controlling the level in a beverage dispensing system
WO1993016425A1 (en) * 1992-02-17 1993-08-19 Deuta-Werke Vorm. Deutsche Tachometerwerke Gmbh Method and device for monitoring the oil level in the oil sump of for instance an internal-combustion engine, in particular a ship's diesel
DE10262062B4 (en) * 2002-04-30 2008-11-06 Bayerische Motoren Werke Aktiengesellschaft oil tank
EP2508853A1 (en) * 2011-04-05 2012-10-10 Hitachi Ltd. Fluid level measurement instrument by using solenoid coil
WO2021164956A1 (en) * 2020-02-21 2021-08-26 Hydac Process Technology Gmbh Device for processing fluid mixtures
CN115295377A (en) * 2022-09-26 2022-11-04 西南应用磁学研究所(中国电子科技集团公司第九研究所) Permanent magnet focusing system of microwave device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0409349A1 (en) * 1989-07-19 1991-01-23 Sara Lee/De N.V. Apparatus for controlling the level in a beverage dispensing system
WO1993016425A1 (en) * 1992-02-17 1993-08-19 Deuta-Werke Vorm. Deutsche Tachometerwerke Gmbh Method and device for monitoring the oil level in the oil sump of for instance an internal-combustion engine, in particular a ship's diesel
DE10262062B4 (en) * 2002-04-30 2008-11-06 Bayerische Motoren Werke Aktiengesellschaft oil tank
EP2508853A1 (en) * 2011-04-05 2012-10-10 Hitachi Ltd. Fluid level measurement instrument by using solenoid coil
WO2021164956A1 (en) * 2020-02-21 2021-08-26 Hydac Process Technology Gmbh Device for processing fluid mixtures
CN115295377A (en) * 2022-09-26 2022-11-04 西南应用磁学研究所(中国电子科技集团公司第九研究所) Permanent magnet focusing system of microwave device
CN115295377B (en) * 2022-09-26 2023-01-13 西南应用磁学研究所(中国电子科技集团公司第九研究所) Permanent magnet focusing system of microwave device

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees