GB2248939B - Switch for an automatic pump - Google Patents

Switch for an automatic pump

Info

Publication number
GB2248939B
GB2248939B GB9019987A GB9019987A GB2248939B GB 2248939 B GB2248939 B GB 2248939B GB 9019987 A GB9019987 A GB 9019987A GB 9019987 A GB9019987 A GB 9019987A GB 2248939 B GB2248939 B GB 2248939B
Authority
GB
United Kingdom
Prior art keywords
switch
automatic pump
pump
automatic
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 - Fee Related
Application number
GB9019987A
Other versions
GB9019987D0 (en
GB2248939A (en
Inventor
William James Gibson
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.)
PUMP INTERNATIONAL Ltd
Original Assignee
PUMP INTERNATIONAL 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 PUMP INTERNATIONAL Ltd filed Critical PUMP INTERNATIONAL Ltd
Priority to GB9019987A priority Critical patent/GB2248939B/en
Publication of GB9019987D0 publication Critical patent/GB9019987D0/en
Publication of GB2248939A publication Critical patent/GB2248939A/en
Application granted granted Critical
Publication of GB2248939B publication Critical patent/GB2248939B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/265—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
    • 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
    • G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/266—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
    • 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
    • G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/268—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes
    • 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
GB9019987A 1990-09-13 1990-09-13 Switch for an automatic pump Expired - Fee Related GB2248939B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9019987A GB2248939B (en) 1990-09-13 1990-09-13 Switch for an automatic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9019987A GB2248939B (en) 1990-09-13 1990-09-13 Switch for an automatic pump

Publications (3)

Publication Number Publication Date
GB9019987D0 GB9019987D0 (en) 1990-10-24
GB2248939A GB2248939A (en) 1992-04-22
GB2248939B true GB2248939B (en) 1994-08-31

Family

ID=10682120

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9019987A Expired - Fee Related GB2248939B (en) 1990-09-13 1990-09-13 Switch for an automatic pump

Country Status (1)

Country Link
GB (1) GB2248939B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2728341B1 (en) * 1994-12-19 1997-05-09 Langlois Pierre DEVICE FOR DETECTING THE LEVEL OF A LIQUID IN ONE OR MORE TANKS
AU2434497A (en) * 1996-04-03 1997-10-22 Robertshaw Controls Company Fluid sensor
DE102004030049A1 (en) * 2004-06-22 2006-01-12 BSH Bosch und Siemens Hausgeräte GmbH Device for detecting the level in a container
US10724527B2 (en) 2017-05-24 2020-07-28 Bilge Sense LLC Liquid sensing switch
WO2023139353A1 (en) * 2022-01-18 2023-07-27 Sentec Ltd Fluid sensor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1436787A (en) * 1972-12-21 1976-05-26 Voll W Device for detecting the presence of liquids
GB2170331A (en) * 1985-01-24 1986-07-30 Ward Ind Plant Limited T W Water level controller for a boiler
US4678403A (en) * 1985-08-01 1987-07-07 Rudy Richard M Liquid level sensor for controlling pump operation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1436787A (en) * 1972-12-21 1976-05-26 Voll W Device for detecting the presence of liquids
GB2170331A (en) * 1985-01-24 1986-07-30 Ward Ind Plant Limited T W Water level controller for a boiler
US4678403A (en) * 1985-08-01 1987-07-07 Rudy Richard M Liquid level sensor for controlling pump operation

Also Published As

Publication number Publication date
GB9019987D0 (en) 1990-10-24
GB2248939A (en) 1992-04-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950913