ES291475A1 - Improvements in and relating to liquid level differential sensing devices - Google Patents

Improvements in and relating to liquid level differential sensing devices

Info

Publication number
ES291475A1
ES291475A1 ES0291475A ES291475A ES291475A1 ES 291475 A1 ES291475 A1 ES 291475A1 ES 0291475 A ES0291475 A ES 0291475A ES 291475 A ES291475 A ES 291475A ES 291475 A1 ES291475 A1 ES 291475A1
Authority
ES
Spain
Prior art keywords
air
liquid
level
ducts
wall
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
ES0291475A
Other languages
Spanish (es)
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.)
FMC Corp
Original Assignee
FMC Corp
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 FMC Corp filed Critical FMC Corp
Publication of ES291475A1 publication Critical patent/ES291475A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G05D9/04—Level control, e.g. controlling quantity of material stored in vessel with auxiliary non-electric power

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

Improvements in control devices, driven by level differences in liquids, especially liquid level sensitive device that responds to variations in the level of different portions of a liquid mass, characterized by comprising a movable wall, means that produce a signal in responsive to the position of the movable wall, two actionable air pumps to move the wall, the air pumps being connected to air exhaust ducts, each of which has an open lower end immersed in the liquid and a column of liquid in the lower terminal portion of the duct, the lower ends of the ducts being at the same level, each of the air pumps being continuously operated to force a stream of air bubbles through the liquid at the lower ends of the ducts of air exhaust, having the highest height of the liquid column contained in the exhaust duct of air submerged in the liquid portion a higher level that causes the air pump connected to it to increase the air pressure exerted by it to force air bubbles through the liquid and thus move the wall displaceable in one direction against pressure exerted by the other air pump. (Machine-translation by Google Translate, not legally binding)
ES0291475A 1962-09-07 1963-09-07 Improvements in and relating to liquid level differential sensing devices Expired ES291475A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22201762A 1962-09-07 1962-09-07

Publications (1)

Publication Number Publication Date
ES291475A1 true ES291475A1 (en) 1963-11-01

Family

ID=22830400

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0291475A Expired ES291475A1 (en) 1962-09-07 1963-09-07 Improvements in and relating to liquid level differential sensing devices

Country Status (3)

Country Link
ES (1) ES291475A1 (en)
GB (1) GB968826A (en)
SE (1) SE321101B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2235497A (en) * 1989-09-01 1991-03-06 * United Kingdom Atomic Energy Authority Fluidic pumping systems

Also Published As

Publication number Publication date
SE321101B (en) 1970-02-23
GB968826A (en) 1964-09-02

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