Surface-temperature sensing method and apparatus
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United States of America Patent
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Mar 13, 1990
Grant Date -
N/A
app pub date -
Dec 20, 1988
filing date -
Dec 20, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus suitable for measuring the surface temperature of a moving strip at an elevated temperature comprises a sensing head connected to a pneumatic actuator through a ball joint. Air under pressure is supplied to a chamber in the head and flows through a ring of passages to form an air cushion between the sensing head and the surface S whose temperature is to be measured. Part of the air flows inward across the surface S to a central aperture in the bottom plate of the head and its temperature is measured by a thermocouple in the aperture. The aperture leads to a cavity above plate and the cavity is vented by passages. The temperature recorded by the thermocouple is a measure of the temperature of surface S.
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