BE789920A - Automatic glass annealing control system - based on measured change of electrical resistivity - Google Patents

Automatic glass annealing control system - based on measured change of electrical resistivity

Info

Publication number
BE789920A
BE789920A BE789920DA BE789920A BE 789920 A BE789920 A BE 789920A BE 789920D A BE789920D A BE 789920DA BE 789920 A BE789920 A BE 789920A
Authority
BE
Belgium
Prior art keywords
control system
electrical resistivity
measured change
automatic glass
change
Prior art date
Application number
Other languages
French (fr)
Original Assignee
Lambert Jean Louis
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.)
Publication date
Publication of BE789920A publication Critical patent/BE789920A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/06—Tempering or quenching glass products using gas for glass products other than flat or bent glass plates, e.g. hollow glassware, lenses
    • C03B27/067—Controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/06—Tempering or quenching glass products using gas for glass products other than flat or bent glass plates, e.g. hollow glassware, lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/06—Tempering or quenching glass products using gas for glass products other than flat or bent glass plates, e.g. hollow glassware, lenses
    • C03B27/065—Stresses, e.g. patterns, values or formulae

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

Esp. for stress relieving large lenses etc. but applicable to any other heat treatment esp. of glass but of any material whose resistivity is in the same order of temp. sensitivity. The method is based on the fact that there is a log relationship between rate of change of electrical resistivity and glass temp. such enabling high control accuracy for the initiation of annealing during heating or near m.pt. and the control system inputs may be either rate of change, or absolute value, or both, of the measured resistivity. The start point for the process is triggered by one or both of the above attaining (a) predetermined value(s).
BE789920D 1972-10-11 Automatic glass annealing control system - based on measured change of electrical resistivity BE789920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE789920 1972-10-11

Publications (1)

Publication Number Publication Date
BE789920A true BE789920A (en) 1973-02-01

Family

ID=3860287

Family Applications (1)

Application Number Title Priority Date Filing Date
BE789920D BE789920A (en) 1972-10-11 Automatic glass annealing control system - based on measured change of electrical resistivity

Country Status (1)

Country Link
BE (1) BE789920A (en)

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