toothed+wheels
21gear — gearless, adj. /gear/, n. 1. Mach. a. a part, as a disk, wheel, or section of a shaft, having cut teeth of such form, size, and spacing that they mesh with teeth in another part to transmit or receive force and motion. b. an assembly of such… …
22gear — n. & v. n. 1 (often in pl.) a a set of toothed wheels that work together to transmit and control motion from an engine, esp. to the road wheels of a vehicle. b a mechanism for doing this. 2 a particular function or state of adjustment of engaged… …
23Savart wheel — The Savart wheel is an acoustical device that was created by French physicist Félix Savart (1791 1841), which he used for research on lower frequency limits of hearing.The device consists of a mounted metal disk having a large number of teeth… …
24Tub boat lift — Tub boats are small boats used to transport coal and other minerals, sometimes working singly, sometimes in long trains. When it is required to move them between different elevations of canal, locks, boat lifts and inclined planes have all been… …
25ratchet — /rach it/, n. 1. a toothed bar with which a pawl engages. 2. (not in technical use) a pawl or the like used with a ratchet or ratchet wheel. 3. a mechanism consisting of such a bar or wheel with the pawl. 4. See ratchet wheel. 5. a steady… …
26Engine — This article is about a machine to convert energy into useful mechanical motion. For other uses of engine, see Engine (disambiguation). For other uses of motor, see Motor (disambiguation). A V6 internal combustion engine from a Mercedes car An… …
27Mechanism (engineering) — A mechanism is a device designed to transform input forces and movement into a desired set of output forces and movement. Mechanisms generally consist of moving components such as gears and gear trains, belt and chain drives, cam and follower… …
28bevel gear — A pair of toothed wheels with teeth cut on a surface at an angle other than 90° to the axis of the shaft on which the wheels are mounted. Bevel gear permits one shaft to drive another shaft that is not parallel to it …
29Chinese windlass — differential dif fer*en tial, a. [Cf. F. diff[ e]rentiel.] 1. Relating to or indicating a difference; creating a difference; discriminating; special; as, differential characteristics; differential duties; a differential rate. [1913 Webster] For… …
30cycloidal engine — Geometric Ge o*met ric, Geometrical Ge o*met ric*al, a. [L. geometricus; Gr. ?: cf. F. g[ e]om[ e]trique.] 1. Pertaining to, or according to the rules or principles of, geometry; determined by geometry; as, a geometrical solution of a problem.… …
