What is "scroll chuck"

Scroll \Scroll\, n. [A dim. of OE. scroue, scrowe (whence E. escrow), OF. escroe, escroue, F. ['e]crou entry in the jail book, LL. scroa scroll, probably of Teutonic origin; cf. OD. schroode a strip, shred, slip of paper, akin to E. shred. Cf. Shred, Escrow.]

1. A roll of paper or parchment; a writing formed into a roll; a schedule; a list.

   The heavens shall be rolled together as a scroll.
   --Isa. xxxiv. 4.

   Here is the scroll of every man's name.
   --Shak.

2. (Arch.) An ornament formed of undulations giving off spirals or sprays, usually suggestive of plant form. Roman architectural ornament is largely of some scroll pattern.

3. A mark or flourish added to a person's signature, intended to represent a seal, and in some States allowed as a substitute for a seal. [U.S.]
   --Burrill.

4. (Geom.) Same as Skew surface. See under Skew.

   Linen scroll (Arch.) See under Linen.

   Scroll chuck (Mach.), an adjustable chuck, applicable to a lathe spindle, for centering and holding work, in which the jaws are adjusted and tightened simultaneously by turning a disk having in its face a spiral groove which is entered by teeth on the backs of the jaws.

   Scroll saw. See under Saw.