Four port tube to extend the life of quartz tubes used for the w

Details Four port tube to extend the life of quartz tubes used for the w Four port tube to extend the life of quartz tubes used for the w

1995-10-12

1997-02-25

Kamen, Noah P.

Heating

With protector, cleaner or support for condition sensor

432 3, 432 76, F27D 1900

Patent

active

056054548

ABSTRACT:
A quartz tube with multiple thermocouple ports arranged along its radius allows for the quartz tube to be rotated while the thermocouple is always placed in the bottom position of the quartz tube. This avoids a problem of the sagging of the quartz tube. When quartz tubes are not rotated, the quartz tubes tend to start sagging from their top. By rotating the quartz tube different portions of the quartz tube are at the top at different times. By using multiple thermocouple ports arranged around the radius of the quartz tube, the thermocouple can be positioned at the bottom of the quartz tube for different orientations of the quartz tube.

REFERENCES:
patent: 4943234 (1990-07-01), Sohlbrand
patent: 5064367 (1991-11-01), Philipossian
patent: 5254172 (1993-10-01), Otaki et al.
patent: 5330352 (1994-07-01), Watanabe et al.

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