G - Physics – 01 – L
Patent
G - Physics
01
L
73/125
G01L 13/00 (2006.01) G01L 11/00 (2006.01)
Patent
CA 1097944
ABSTRACT OF THE DISCLOSURE Apparatus for attachment to a furnace system for indicating furnace draft, comprising piezometric chamber means for indicating true average atmospheric pressure, connected by a small diameter pressure tube to an inclined tube draft manometer, the second end of which is inserted through the wall of the furnace to the interior thereof. The piezometric chamber comprises a first vertical elongated pipe, closed at top and bottom, with a plurality of small diameter ports drilled near the base and evenly spaced around the circumference. A second pipe of smaller diameter is inserted co-axially through the bottom closure. The smaller pipe has an annular baffle plate attached about its outer surface inside of the larger pipe, to provide a narrow annular pas- sage for air flow from the ports to and from the interior of the smaller second pipe.
312419
Smart & Biggar
Zink (john) Company
LandOfFree
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