Purge assembly

Details Purge assembly Purge assembly

1995-06-02

1997-02-04

Fulton, Christopher W.

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

374208, 359509, G01J 504

Patent

active

055991050

ABSTRACT:
A purge assembly for mounting to a radiation thermometer, comprises a purge tube for mounting in front of the radiation thermometer. At least two axially spaced chambers are positioned about the purge tube, each pair of chambers being linked by a respective restrictive opening such that a difference in pressure exists between adjacent chambers in use. An upstream chamber with respect to the flow of purge fluid is connected to source of purge fluid such as air in use and a downstream chamber with respect to the flow of purge fluid opens into the purge tube via a swirl reducing system whereby purge fluid is emitted into the purge tube in use. The chambers are positioned such that fluid flows through the chambers generally towards the lens and then through the downstream chamber opening towards an outer end of the purge tube away from the lens.

REFERENCES:
patent: 3436965 (1969-04-01), Land
patent: 4836689 (1989-06-01), O'Brien et al.
patent: 5146244 (1992-09-01), Myhre et al.

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