Improvements in or relating to 'Jim Crows' and similar Appliances for Bending and Straightening Rails, Tubes and the like.

摘要

10,792. Threlfall, R. J., and Newman, B. May 23. Bending; straightening.-The screw b of a Jim crow or like tool for bending or straightening rails, pipes, &c., is operable either directly by means of a crowbar or by means of a worm-wheel and a worm g, the wheel being slidable, but prevented by a key and keyway from rotating. on the screw b, and the worm mounted eccentrically in bushes h rotatable by means of a handle k in the lugs j, or otherwise arranged, so as to be disengageable from the worm-wheel.