GEARING

Gear″ing, n. 1. 1. Harness.
2. 2. (Mach.) The parts by which motion imparted to one portion of an engine or machine is transmitted to another, considered collectively; as, the valve gearing of a locomotive engine; belt gearing; esp., a train of wheels for transmitting and varying motion in machinery.
Frictional gearing. See under Frictional. — Gearing chain, an endless chain transmitting motion from one sprocket wheel to another. See Illust. of Chain wheel. — Spur gearing, gearing in which the teeth or cogs are ranged round either the concave or the convex surface (properly the latter) of a cylindrical wheel; — for transmitting motion between parallel shafts, etc.