tangent screw — noun 1. : a worm that works tangentially on a worm wheel to which it imparts an endless motion 2. : a very fine screw giving a tangential movement for making the final adjustment to an instrument of precision (as a surveyor s transit) … Useful english dictionary
Tangent — Tan gent, a. [L. tangens, entis, p. pr.] Touching; touching at a single point; specifically (Geom.) meeting a curve or surface at a point and having at that point the same direction as the curve or surface; said of a straight line, curve, or… … The Collaborative International Dictionary of English
Tangent plane — Tangent Tan gent, a. [L. tangens, entis, p. pr.] Touching; touching at a single point; specifically (Geom.) meeting a curve or surface at a point and having at that point the same direction as the curve or surface; said of a straight line, curve … The Collaborative International Dictionary of English
Tangent scale — Tangent Tan gent, a. [L. tangens, entis, p. pr.] Touching; touching at a single point; specifically (Geom.) meeting a curve or surface at a point and having at that point the same direction as the curve or surface; said of a straight line, curve … The Collaborative International Dictionary of English
Tangent wheel — (a) A worm or worm wheel; a tangent screw. (b) A wheel with tangent spokes. [Webster 1913 Suppl.] … The Collaborative International Dictionary of English
tangent wheel — Worm Worm (w[^u]rm), n. [OE. worm, wurm, AS. wyrm; akin to D. worm, OS. & G. wurm, Icel. ormr, Sw. & Dan. orm, Goth. wa[ u]rms, L. vermis, Gr. ? a wood worm. Cf. {Vermicelli}, {Vermilion}, {Vermin}.] [1913 Webster] 1. A creeping or a crawling… … The Collaborative International Dictionary of English
Dividing engine — at the Michigan Museum of Surveying A dividing engine is a device specifically employed to mark graduations on measuring instruments. History There has always been a need for accurate measuring instruments. Whether it is a linear device such as a … Wikipedia
Sextant — This article is about the sextant as used for navigation. For the astronomer s sextant, see Sextant (astronomical). : For the history and development of the sextant see Reflecting instruments A sextant is an instrument generally used to measure… … Wikipedia
Gear — For the gear like device used to drive a roller chain, see Sprocket. This article is about mechanical gears. For other uses, see Gear (disambiguation). Two meshing gears transmitting rotational motion. Note that the smaller gear is rotating… … Wikipedia
Torsion tensor — In differential geometry, the notion of torsion is a manner of characterizing a twist or screw of a moving frame around a curve. The torsion of a curve, as it appears in the Frenet Serret formulas, for instance, quantifies the twist of a curve… … Wikipedia
