Jim-crow.
1. An implement for bending or straightening rails. In the examples, A is a screw machine, in which the rail lies upon the hooked feet. B C are hydraulic jimcrows with different modes of presentation, the upper one being a rail — bender, and the lower one (C) a shaftstraightener, and [1216] may be used on a rod in a lathe. The jack swivels round in the frame so that the handle may be worked in any direction. 2. The jim-crow planing-machine is furnished with a reversing tool, to plane both ways, and named from its peculiar motion, as the tool is able to “wheel about and turn about.” The table is moved endways by a quick-threaded screw, which allows the driving motion to be placed at the end. |
| Jim-crow. |
