Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1987-09-04
1989-06-06
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
350584, G01J 0508
Patent
active
048366897
ABSTRACT:
A purging air flow system for passing air over a lens to keep it clean and free from particulate contaminants and also for providing a positive flow of air away from the lens has baffles which cause a flow across the lens that is not symmetrical to avoid a dead air or stagnation zone in the center of the lens. The air supply used for such purging is controlled adequately so the flow changes direction and particles are removed from the main flow of purge air by inertial separation prior to the time the air contacts the lens. Such air entrained particles might otherwise deposit on the lens. A flow control orifice also may provide a secondary flow to carry the particles separated from the main flow out of the flow passageway.
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"WO 87/05390, published Sep. 11, 1987, (G01J 05/08, Purgeair System for a Combustion Instrument", Rosemount Inc., (Myhre et al.).
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Myhre Douglas C.
O'Brien Richard J.
Rosemount Inc.
Yasich Daniel M.
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