trammel beam

См. также в других словарях:

• Trammel points — are a device that is commonly used to scribe a circle. Their relatively small size makes them easy to store or transport. Another advantage is that they are simple to use. They consist of two separate metal pieces (approx. 2.5 X 5 X 1/2 ) that… …   Wikipedia

• Trammel of Archimedes — Trammel of Archimedes. A trammel of Archimedes is a mechanism that traces out an ellipse.[1] It consists of two shuttles which are confined ( trammelled ) to perpendicular channels or rails, and a rod which is attached to the shuttles by pivo …   Wikipedia

• Trammel — Tram mel, n. [F. tramail, tr[ e]mail, a net, LL. tremaculum, tremacle, a kind of net for taking fish; L. tres three + macula a mesh. See {Three}, and {Mail} armor.] 1. A kind of net for catching birds, fishes, or other prey. Carew. [1913 Webster] …   The Collaborative International Dictionary of English

• Beam compass — A beam compass is a compass with a beam and sliding sockets or cursors for drawing and dividing circles larger than those made by a regular pair of compasses.[1] The instrument can be as a whole, or made on the spot with individual sockets… …   Wikipedia

• trammel — [ tram(ə)l] noun 1》 (trammels) literary restrictions or impediments to freedom of action. 2》 (also trammel net) a three layered net, designed so that a pocket forms when fish attempt to swim through, thus trapping them. 3》 an instrument… …   English new terms dictionary

• beam caliper — noun 1. : caliper square 2. or beam divider : a trammel fitted with caliper legs …   Useful english dictionary

• trammel — I. noun Etymology: Middle English tramayle, a kind of net, from Old French tramail, from Late Latin tremaculum, from Latin tres three + macula mesh, spot more at three Date: 14th century 1. a net for catching birds or fish; especially one having… …   New Collegiate Dictionary

• trammel — n. & v. n. 1 (usu. in pl.) an impediment to free movement; a hindrance (the trammels of domesticity). 2 a triple drag net for fish, which are trapped in a pocket formed when they attempt to swim through. 3 an instrument for drawing ellipses etc.… …   Useful english dictionary

• trammel point — noun : either of the metal points of a beam compass …   Useful english dictionary

• commercial fishing — Introduction  the taking of fish and other seafood and resources from oceans, rivers, and lakes for the purpose of marketing them.       Fishing is one of the oldest employments of humankind. Ancient heaps of discarded mollusk shells (shell… …   Universalium

• Crane (machine) — A modern crawler type derrick crane with outriggers. The latticed boom is fitted with a jib. A crane is a type of machine, generally equipped with a hoist, wire ropes or chains, and sheaves, that can be used both to lift and lower material …   Wikipedia