The chief point of interest in the machine is undoubtedly the means employed in transferring the motion from the main shaft to the underneath parts, an arrangement as ingenious and effective as any device ever introduced into stitching mechanism. Variation of tension is thus obviated in a very simple manner. In this case the shuttle itself consists of a steel tube, into the open end of which the wound reel is dropped, and is free to revolve quite loosely. The most novel machine of this kind is the vibrating shuttle machine just produced by the Singer Manufacturing Company. These are shuttles of the long description, moving in a segment of a circle.
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