scroll chuck (skrolchuk)

A form of lathe chuck in which the dogs are caused to approach or recede from the center simultaneously by the revolution of a grooved scroll. of scrolled (skrõld), p. a. [ turned outward. Also called billet - head and scroll. scroll-lathe (skrōl'lān), n. A lathe especially adapted for spiral work, or objects of scroll shaped outline, as piano-legs and balusters. scroll-saw (skrōl'sa), n. A saw or sawing-machine for cutting thin boards, veneers, or plates into ornamental scrollwork, or for preparing wood for inlaying. The smaller foot-power machines consist of narrow saw-blades fitted to a spring frame, and operated by a treadle. The larger machines include both reciprocating saws or jig-saws and band-saws. In all the saw pa es through a hole in the table, and the material, laid on the table, is pushed against the saw. See cut under band-saw. scroll-wheel (skrōl'hwēl), n. A cog-wheel in the form of a scroll, the effect of which is to cause the gearing to rotate more slowly when engaged with its main parts than when it is working in the outer parts. It is used in some machines, as harvesters, as a means of converting rotary into reciprocal motion by rapid reversals of the motion of the scroll-wheel.