rocking slide valve
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rocking valve — noun or rocking slide valve : a steam engine valve consisting of a disk or cylindrical piece with the necessary openings that oscillates or revolves on its seat * * * (on a steam engine) a valve mechanism oscillating through an arc to open and… … Useful english dictionary
Valve gear — The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It is sometimes referred to as the… … Wikipedia
valve — I (New American Roget s College Thesaurus) n. damper, cutoff, cock, butterfly, pallet, poppet; ventil, side valve; plug, piston, cusp. See closure. II (Roget s IV) n. Syn. flap, lid, plug; see device 1 , pipe 1 . Types of valves include:… … English dictionary for students
USS Spuyten Duyvil (1864) — During the American Civil War, the Union Navy suffered heavy losses from the explosion of Confederate torpedoes. This experience prompted the Union Navy to design and build vessels capable of using this new weapon. One effort along this line… … Wikipedia
Mastodon (steam locomotive) — Mastodon Artist drawing of CPR #229, Mastodon. Power type Steam Builder Central Pacific s Sacramento, California, shops Serial number 20 Build dat … Wikipedia
Cylinder (locomotive) — The motion on the left hand side of 60163 Tornado. The black casting to the left houses the cylinder, in which slides the piston; the piston rod is immediately above the wheel. The cylinders of a steam locomotive are the components that convert… … Wikipedia
Paintball marker — A paintball marker, also known as a paintball gun, is the central or main piece of equipment in the sport of paintball. Markers make use of an expanding gas such as carbon dioxide, compressed air or nitrogen dioxide to propel paintballs through… … Wikipedia
keyboard instrument — ▪ music Introduction any musical instrument on which different notes can be sounded by pressing a series of keys, push buttons, or parallel levers. In nearly all cases in Western music the keys correspond to consecutive notes in the… … Universalium
Impact wrench — An impact wrench (also known as an air wrench, air gun, rattle gun, torque gun) is a socket wrench power tool designed to deliver high torque output with minimal exertion by the user, by storing energy in a rotating mass, then delivering it… … Wikipedia
technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… … Universalium
