1—AN EXPERIMENTAL STUDY OF SHUTTLE PROJECTION

Abstract

ABSTRACT A method is described for measuring the displacement of the shuttle and the rotation of the loom crank-shaft relative to time and to each other; from these measurements shuttle and loom speeds and accelerations can be derived. It was found that the initial and average shuttle speeds were approximately equal and ranged from 31 to 48 feet per second on the fifteen looms measured. The different speeds produced by different nose-bits were found to be approximately proportional to the nominal displacements after 30 degrees' rotation of the crank-shaft. The shuttle speed was approximately directly proportional to the average loom speed during picking, approximately inversely proportional to the distance of the picking tappet from the picking shaft, and independent of the mass of the shuttle and the position of the buffer. The timing of the pick produced no effect if the sley were stationary, but under normal conditions unsystematic changes occurred, though on the whole a later pick gave a higher shuttl...