G - Physics – 01 – J
Patent
G - Physics
01
J
73/112, 257/5, 3
G01J 5/10 (2006.01) F28D 17/00 (2006.01) G01J 5/02 (2006.01)
Patent
CA 1062043
ABSTRACT OF THE DISCLOSURE An infrared ray viewing device for an air preheater having a clamping ring that holds a lens in a predetermined position and simultaneously provides an air flow passageway around the pe- riphery of the lens to exhaust a stream of cleaning air radially over the surface of the lens to remove dust deposits therefrom.
273766
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