POSITIVE (3)

Pos″i‐tive, a. 1. 1. (Mach. & Mech.) (a) Designating, or pertaining to, a motion or device in which the movement derived from a driver, or the grip or hold of a restraining piece, is communicated through an unyielding intermediate piece or pieces; as, a claw clutch is a positive clutch, while a friction clutch is not. (b) Designating, or pertaining to, a device giving a to-and-fro motion; as, a positive dobby.
2. 2. (Vehicles) Designating a method of steering or turning in which the steering wheels move so that they describe concentric arcs in making a turn, to insure freedom from side slip or harmful resistance.