tube diaphragm

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• Diaphragm (optics) — A 35 mm lens set to f/8; the diameter of the seven sided entrance pupil, the virtual image of the opening in the iris diaphragm, is 4.375 mm In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of… …   Wikipedia

• diaphragm — 1. The musculomembranous partition between the abdominal and thoracic cavities. SYN: diaphragma (2) [TA], interseptum, midriff, phren (1). 2. A thin disk pierced with an opening, used in a microscope, camera, or other op …   Medical dictionary

• diaphragm — noun Etymology: Middle English diafragma, from Late Latin diaphragma, from Greek, from diaphrassein to barricade, from dia + phrassein to enclose Date: 14th century 1. a body partition of muscle and connective tissue; specifically the partition… …   New Collegiate Dictionary

• Shock tube — A shock tube is a device used primarily to study gas phase combustion reactions. Shock tubes (and related shock tunnels) can also be used to study aerodynamic flow under a wide range of temperatures and pressures that are difficult to obtain in… …   Wikipedia

• Pitot tube — A Pitot (pronEng|ˈpiːtoʊ) tube is a pressure measurement instrument used to measure fluid flow velocity. The Pitot tube was invented by Italian born French engineer Henri Pitot in the early 1700s, and was modified to its modern form in the mid… …   Wikipedia

• Ludwieg tube — A Ludwieg tube is a cheap and efficient way of producing supersonic flow. Mach numbers up to 4 are easily obtained without any additional heating of the flow, with heating Mach numbers of up to 11 can be reached.PrincipleA Ludwieg tube is a wind… …   Wikipedia

• Chest tube — Intervention The free end of the Chest Drainage Device is usually attached to an underwater seal, below the level of the chest. This allows the air or fluid to escape from the pleural space, and prevents anything returning to the chest …   Wikipedia

• shock tube — noun : a long closed tube of uniform cross section used for studying the transient effects of a shock wave usually produced when a diaphragm dividing the tube into two chambers containing gas at different pressures is ruptured * * * shock tube,… …   Useful english dictionary

• Lenard tube — Electronics. an early cathode ray tube having at the end opposite the cathode a window of thin glass or metal allowing cathode rays (Lenard rays) to pass out into the atmosphere. [named after P. LENARD] * * * Lenard tube, a special form of vacuum …   Useful english dictionary

• shock tube — noun Date: 1949 a usually enclosed tube in which experimental shock waves are produced as a result of the rupturing of a diaphragm separating two chambers containing a gas or gases at differential pressure …   New Collegiate Dictionary

• braun tube — ˈbrau̇n noun Usage: usually capitalized B Etymology: after Karl F. Braun died 1918 German physicist : a cathode ray tube with a diaphragm through which a beam of cathode rays can pass and a fluorescent screen on which the beam is received …   Useful english dictionary