What is "double-geared"

a. (context engineering of a machine English) Driven through twofold compound gearing, to increase the force or speed.

1. adj. equipped with compound gearing consisting of 2 pinions and 2 wheels in mesh to increase the mechanical advantage; "the double-geared lifting mechanism of a crane"

2. (of a lathe) equipped with gearing for reducing the speed of the spindle from that of the driving pulley; "a back-geared lathe" [syn: back-geared]