GB796814A - Control system for regulating the conductivity of liquids - Google Patents

Control system for regulating the conductivity of liquids

Info

Publication number
GB796814A
GB796814A GB4549/55A GB454955A GB796814A GB 796814 A GB796814 A GB 796814A GB 4549/55 A GB4549/55 A GB 4549/55A GB 454955 A GB454955 A GB 454955A GB 796814 A GB796814 A GB 796814A
Authority
GB
United Kingdom
Prior art keywords
mixture
solenoid
strip
relay
tank
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
GB4549/55A
Inventor
George H Rendel
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.)
United States Steel Corp
Original Assignee
United States Steel 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 United States Steel Corp filed Critical United States Steel Corp
Publication of GB796814A publication Critical patent/GB796814A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
    • G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2499—Mixture condition maintaining or sensing
    • Y10T137/2509—By optical or chemical property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7287—Liquid level responsive or maintaining systems
    • Y10T137/7306—Electrical characteristic sensing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

796,814. Automatic mixture control systems. UNITED STATES STEEL CORPORATION. Feb. 15, 1955 [Nov. 12, 1954], No. 4549/55. Class 38 (4). In a system for automatically maintaining a predetermined conductivity of a mixture of water and a substance in a conductivity cell, the voltage from a potentiometer in circuit with the electric supply to the cell is applied, in opposition to a bias voltage, to an electron tube relay, contacts of which control, through a solenoid-operated valve, the supply of substance to the mixture. As shown, a steel strip S to be pickled or cleaned is passed through a mixture of acid and water in a tank 2, the voltage from a generator 12 being applied between the strip and electrodes 10. Starting, with the tank empty, is effected by closing the switch 74C, 74C1. In consequence a motor 68 runs to close camoperated contacts 64C for a period of time so that a solenoid-operated valve 46 is opened to allow a predetermined quantity of acid to flow into the tank through a conduit 22. Water flows into the tank continuously through a conduit 18 until the mixture rises to the level of probes 80 so that a solenoid-operated valve 76 is closed. Thereafter any decrease in the acid content reduces the current passing through a conductivity cell 24 so that the consequent decrease in volt-drop across a potentiometer 30 operates a thermionic valve controlled relay 42 to energize a solenoid-operated valve 46 which allows acid to enter the tank to correct the acid content. To prevent over-correction a motor 54 continuously operating contacts 52C permits only intermittent short-period opening of valve 46. The drive to strip S (not shown) is started by operation of a push-button 92 which also operates a relay 60. Unless the strip is running, relay 60 maintains motor 54 deenergized with contacts 52C open to prevent operation of the acid correcting system. The level of the mixture is maintained by automatic operation of solenoid valve 76 but if for any reason the level falls below a probe 88P a relay 90 is de-energized to stop the strip and light a warning lamp 94.
GB4549/55A 1954-11-12 1955-02-15 Control system for regulating the conductivity of liquids Expired GB796814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US468457A US2819726A (en) 1954-11-12 1954-11-12 Control system for regulating the conductivity of liquids

Publications (1)

Publication Number Publication Date
GB796814A true GB796814A (en) 1958-06-18

Family

ID=23859892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4549/55A Expired GB796814A (en) 1954-11-12 1955-02-15 Control system for regulating the conductivity of liquids

Country Status (5)

Country Link
US (1) US2819726A (en)
BE (1) BE536302A (en)
DE (1) DE966811C (en)
FR (1) FR1120321A (en)
GB (1) GB796814A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273580A (en) * 1966-09-20 Solution concentration control and make-up system
US3163173A (en) * 1960-10-31 1964-12-29 Phillips Petroleum Co Automatic chemical injection control
US3195551A (en) * 1960-12-19 1965-07-20 Brogdex Co Method and apparatus for the measurement and control of acidity of solutions
US3256901A (en) * 1961-10-23 1966-06-21 Phillips Petroleum Co Automatic chemical injection control
US3062223A (en) * 1962-02-15 1962-11-06 Leonard E Malin Apparatus for controlling pickling baths
US3162207A (en) * 1962-04-03 1964-12-22 Chemical Corp Method of controlling chromate conversion coating baths
US3383904A (en) * 1962-06-25 1968-05-21 Ethyl Corp Automatic antiknock rating and adjustment apparatus
US3292650A (en) * 1963-10-01 1966-12-20 Wright Chem Corp Water treatment and make-up control system
US3438071A (en) * 1967-07-27 1969-04-15 Tee Pak Inc Dyeing of cellulose casing
US3658676A (en) * 1970-05-13 1972-04-25 Sherwin Williams Co Monitoring apparatus and process for controlling composition of aqueous electrodeposition paint baths
IT1062800B (en) * 1975-11-14 1985-01-31 Dasco Spa EQUIPMENT FOR THE AUTOMATIC PREPARATION OF LIQUIDS WITH CONTROLLED CONCENTRATION, IN PARTICULAR FOR THE PREPARATION OF THE DIALYSIS LIQUID
US4360323A (en) * 1976-11-19 1982-11-23 Halbert Fischel Proportioning pumping system for dialysis machines
US4064706A (en) * 1977-03-03 1977-12-27 Stephens Jr Raymond E Evaporative roof cooling system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1319734A (en) * 1919-10-28 Frederick w
US1558060A (en) * 1924-08-01 1925-10-20 Lawrence A Stead Acid-circulating system for mercerizing yarn
US2176471A (en) * 1936-03-13 1939-10-17 California Packing Corp Controlling apparatus
US2377363A (en) * 1941-07-28 1945-06-05 Sidney G Noble Solution concentration control system
US2560854A (en) * 1942-06-30 1951-07-17 Ferrand Louis Apparatus for the continuous operation of cells for the electrolysis of molten salts
US2492174A (en) * 1944-09-29 1949-12-27 Elizabeth A Noble Solution concentration control system
US2468791A (en) * 1945-06-30 1949-05-03 Photoswitch Inc Conductivity control
US2586169A (en) * 1947-08-04 1952-02-19 Patent Man Inc Apparatus for controlling and measuring the concentration of solutions
US2593825A (en) * 1948-09-29 1952-04-22 Hall Lab Inc Conductivity controlled dispenser

Also Published As

Publication number Publication date
DE966811C (en) 1957-09-12
FR1120321A (en) 1956-07-04
US2819726A (en) 1958-01-14
BE536302A (en) 1955-03-31

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