Glass ribbon float tank with a pyrometer assembly having a heated viewing tube and method of use
AssigneePPG Industries, Inc.
InventorGeorge E. Sleighter
Life of this patent
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Abstract
A viewing tube extension for an infrared radiation pyrometer includes a tube having a heater therein. The heater has a passageway so that the pyrometer sights a glass ribbon moving through a forming chamber of a flat glass making apparatus. Vapors from the heating chamber moving into the tube are maintained above their dew point as a purge gas moves the vapors out of the tube.
Claims13
A pyrometer assembly for monitoring the temperature of a glass ribbon supported on a pool of molten metal contained in a forming chamber of a flat glass apparatus, the forming chamber having a vapor atmosphere therein, comprising:
- a pyrometer;
- heating means having a viewing passageway therethrough;
- means for aligning said pyrometer with the passageway of said heater;
- means for connecting the pyrometer and said heater to one another to prevent uncontrolled movement of gas therebetween;
- means for moving a gas through said connecting means;
- and
- means for mounting said tube in roof of the forming chamber.
Method of measuring temperature of a glass ribbon moving on a pool of molten metal through forming chamber of a flat glass making apparatus, the chamber having a heated vapor atmosphere, comprising the steps of:
- viewing the ribbon through heating means by way of temperature sensing means;
- heating the heating means to a temperature greater than the dew point of the vapor atmosphere to prevent condensation of the vapors in the heating means;
- and
- moving a purge gas through the heating means to move the vapors out of the heating means.
Dependencies are inferred from the claim text.