E.i. Dupont De Nemours and Company

Allan B Hughes

Terrence A Dear

James Weaver Hare

A flow control valve installation having blind holes in internal surfaces. The holes are slanted in the downstream direction and tuned to null one or more frequencies in the noise spectrum for the valve by the selection of proper depths for the holes.

Fluid control apparatus

A flow control valve having a flow-dividing cage surrounding its plug. The cage includes stacked plates spaced by dependent legs and annular screens in the spaces between adjacent plates.

Control valve

A yarn winding apparatus with a rotatably driven barrel cam having a groove in its cylindrical surface and a slide member and traverse guide assembly engaging the groove constrained for reciprocating linear movement, as the cam rotates, is provided with a constant tension yarn laydown at the reversals by incorporating a resilient lever between the guide and the slide head capable of being flexed at the cam reversals within a predetermined critical range of from about 2.5.degree. to about 6.5.degree. with respect to a plane perpendicular to the linear movement of the guide assembly when the slide head moves in a horizontal path.

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Wilmington, DE, United States of America

Allan B Hughes