e/Sector(instrument)

Information
has gloss	eng: The sector, also known as a proportional compass or military compass, was a major calculating instrument in use from the end of the sixteenth century until the nineteenth century. It is an instrument consisting of two rulers of equal length which are joined by a hinge. A number of scales are inscribed upon the instrument which facilitate various mathematical calculations. It was used for solving problems in proportion, trigonometry, multiplication and division, and for various functions, such as squares and cube roots. Its several scales permitted easy and direct solutions of problems in gunnery, surveying and navigation. The sector derives its name from the fourth proposition of the sixth book of Euclid, where it is demonstrated that similar triangles have their like sides proportional. It has four parts, two legs with a pivot (the articulation), a quadrant and a clamp (the curved part at the end of the leg) that enables the compass to function as a gunner's quadrant.
lexicalization	eng: Sector(instrument)
lexicalization	eng: sector
instance of	(noun) a small machine that is used for mathematical calculations calculating machine, calculator

Meaning
French
has gloss	fra: Le compas de proportion est un instrument de mathématique, composé de deux règles plates, assemblées à charnière par un des bouts, comme un compas ordinaire, pouvant de même se fermer ou s’ouvrir sous des angles plus ou moins aigus et portant sur leurs faces des lignes divisées pour servir à divers usages de géométrie.
lexicalization	fra: Compas de Proportion
Italian
has gloss	ita: Il compasso proporzionale o di proporzione è stato un importante strumento utilizzato dalla fine del XVI secolo sino al XX che può essere considerato «... il primo vero strumento di calcolo della storia dell umanità, dall apparenza semplice, e tuttavia in grado di eseguire operazioni matematiche e geometriche complesse»
lexicalization	ita: compasso proporzionale

Media
media:img	Compas de proportion 1.jpg
media:img	Compas de proportion 2.jpg
media:img	Galileo's geometrical and military compass in Putnam Gallery, 2009-11-24.jpg