Allied Corporation

Allied Chemical Corporation

Harry Lee Newell, Jr

James Judson Cooksey

Wilbur L Stables

William Robert Weiss

Apparatus for determining the velocity of a gas in a gas supply duct is provided. The apparatus comprises a flow nozzle and a pitot tube. The flow nozzle has an inlet opening for receiving the gas and an outlet opening for expelling the gas after it has accelerated through a throat connecting the openings. The throat narrows in a curve from the inlet opening to outlet opening. The nozzle is mounted in the duct coaxially in a fluid-tight relationship therewith, the cross-sectional area of the duct and the cross-sectional area of the inlet opening being substantially identical. The cross-sectional area of the outlet opening is 40 to 60 percent that of the duct. The pitot tube comprises an impact tube and a static tube mounted in parallel through the duct downstream of the nozzle and both bending upstream toward the nozzle parallel to the duct axis. The opening of the impact tube is located in the volume bound by the cross-sectional area of the outlet opening and a distance of up to 6.25 percent of the duct inside diameter downstream of the outlet opening. The static tube has a plurality of apertures in the portion located in the volume bounded by the cross-sectional area of the outlet opening and a distance of up to 12.5 percent of the duct inside diameter downstream of the outlet opening.

Apparatus for measuring gas velocity

A muffler for use in conjunction with an interfloor tube and aspirating means during the production of multifilament, synthetic yarn is provided. Audible noise which is emitted at the exit end of the interfloor tube is reduced by up to 33.5 .DELTA.dB(A) and brought to within acceptable levels through the use of a perforated tube, resonant chambers, and sound absorbing means.

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Richmond, VA, United States of America

Harry Lee Newell, Jr