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GB887267A - Improvements in or relating to control systems - Google Patents

Improvements in or relating to control systems

Info

Publication number
GB887267A
GB887267A GB1059/58A GB105958A GB887267A GB 887267 A GB887267 A GB 887267A GB 1059/58 A GB1059/58 A GB 1059/58A GB 105958 A GB105958 A GB 105958A GB 887267 A GB887267 A GB 887267A
Authority
GB
United Kingdom
Prior art keywords
point
error
voltage
potentiometer
control systems
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
GB1059/58A
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.)
Industrial Nucleonics Corp
Original Assignee
Industrial Nucleonics 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 Industrial Nucleonics Corp filed Critical Industrial Nucleonics Corp
Publication of GB887267A publication Critical patent/GB887267A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
    • G01B15/02—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring thickness
    • G01B15/025—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring thickness by measuring absorption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)

Abstract

887,267. Automatic control systems. INDUSTRIAL NUCLEONICS CORPORATION. Jan. 10, 1958 [Feb. 20, 1957], No. 1059/58. Class 38 (4). A voltage representative of a characteristic of the product 12 of a process is converted into an " error " signal for automatic control purposes (the circuitry for utilizing the error signal is the subject-matter of divisional Specification 887.271), by subtracting from it a reference voltage preset by potentiometer 70 in circuit 62, and applying the resultant voltage to amplifier 44, part of the output from which (from point 80) is used as negative feedback, a potentiometer 92 across point 80 allowing for a variable gain (shown in dial 93) in the output to point 100. The input is shown as derived from a radiation gauge 18 measuring the weight or thickness of the product 12, and 70 is set to give between points 86 and 88 a voltage corresponding to the desired value of the characteristics; the error then appears on meter 76. Specification 873,629 also is referred to.
GB1059/58A 1957-02-20 1958-01-10 Improvements in or relating to control systems Expired GB887267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US887267XA 1957-02-20 1957-02-20

Publications (1)

Publication Number Publication Date
GB887267A true GB887267A (en) 1962-01-17

Family

ID=22213084

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1059/58A Expired GB887267A (en) 1957-02-20 1958-01-10 Improvements in or relating to control systems

Country Status (1)

Country Link
GB (1) GB887267A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0478690A4 (en) * 1989-06-22 1992-09-02 Measurex Corporation Method of obtaining accurate compositional information of multilayer compositions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0478690A4 (en) * 1989-06-22 1992-09-02 Measurex Corporation Method of obtaining accurate compositional information of multilayer compositions

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