[f. JACK sb.1 8 + FRAME.]
1. The frame in which a jack or winch is fixed.
1703. Moxon, Mech. Exerc., 41. The Nuts will not draw the Fore and Backsides close…, then the whole Jack Frame will not stand fast and firm together.
2. Cotton Manuf. A contrivance consisting of a rotating can containing a bobbin, formerly much used for giving a twist to the roving as delivered by the drawing rollers, and simultaneously winding it upon the bobbin. Also called jack-in-a-box.
1875. Knight, Dict. Mech., s.v., The jack-frame was superseded by the Bobbin and Fly-frame.
