GB698237A - Improvements relating to apparatus for electrically measuring the properties of liquids, the electrical conductivity of which varies with said properties - Google Patents

Improvements relating to apparatus for electrically measuring the properties of liquids, the electrical conductivity of which varies with said properties

Info

Publication number
GB698237A
GB698237A GB26815/49A GB2681549A GB698237A GB 698237 A GB698237 A GB 698237A GB 26815/49 A GB26815/49 A GB 26815/49A GB 2681549 A GB2681549 A GB 2681549A GB 698237 A GB698237 A GB 698237A
Authority
GB
United Kingdom
Prior art keywords
properties
boiler
relay
water
feed water
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
GB26815/49A
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.)
Crockatt & Sons Ltd W
Original Assignee
Crockatt & Sons Ltd W
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 Crockatt & Sons Ltd W filed Critical Crockatt & Sons Ltd W
Priority to GB26815/49A priority Critical patent/GB698237A/en
Publication of GB698237A publication Critical patent/GB698237A/en
Priority to GB30574/53A priority patent/GB765462A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

698,237. Automatic control systems. CROCKATT & SONS, Ltd., W., and CROCKATT, W. C. Oct. 20, 1950 [Oct. 19, 1949], No. 26815/49. Class 38 (iv). [Also in Group XXXVI] Apparatus for maintaining the water in a boiler tank 47 below a certain impurity level comprises a relay 17 in series with an electrode cell 5 containing a sample of the feed water, supplied with a constant voltage through a potentiometer 8 and temperature compensating resistance 11, so that when the impurities in the feed water increase to a maximum value the increased current through the relay 17 causes it to operate, thereby energizing a warning lamp 29 and bell 23, also closing a further relay 26 which operates a control valve 32 to modify the supply of feed water through a pipe 45. A second cell 6 measures the conductivity of the water in the boiler 47, and opens a blow-down valve 33 when the maximum degree of impurity is exceeded, the boiler being refilled by pump 49 from the boiler feed tank 46.
GB26815/49A 1949-10-19 1949-10-19 Improvements relating to apparatus for electrically measuring the properties of liquids, the electrical conductivity of which varies with said properties Expired GB698237A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB26815/49A GB698237A (en) 1949-10-19 1949-10-19 Improvements relating to apparatus for electrically measuring the properties of liquids, the electrical conductivity of which varies with said properties
GB30574/53A GB765462A (en) 1949-10-19 1953-11-05 Apparatus for measuring the properties of liquids

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB26815/49A GB698237A (en) 1949-10-19 1949-10-19 Improvements relating to apparatus for electrically measuring the properties of liquids, the electrical conductivity of which varies with said properties
GB30574/53A GB765462A (en) 1949-10-19 1953-11-05 Apparatus for measuring the properties of liquids

Publications (1)

Publication Number Publication Date
GB698237A true GB698237A (en) 1953-10-14

Family

ID=60329885

Family Applications (2)

Application Number Title Priority Date Filing Date
GB26815/49A Expired GB698237A (en) 1949-10-19 1949-10-19 Improvements relating to apparatus for electrically measuring the properties of liquids, the electrical conductivity of which varies with said properties
GB30574/53A Expired GB765462A (en) 1949-10-19 1953-11-05 Apparatus for measuring the properties of liquids

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB30574/53A Expired GB765462A (en) 1949-10-19 1953-11-05 Apparatus for measuring the properties of liquids

Country Status (1)

Country Link
GB (2) GB698237A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113567A1 (en) * 1982-12-20 1984-07-18 Betz Europe, Inc. Control system and method of automatic control of cooling water tower systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113567A1 (en) * 1982-12-20 1984-07-18 Betz Europe, Inc. Control system and method of automatic control of cooling water tower systems

Also Published As

Publication number Publication date
GB765462A (en) 1957-01-09

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