McGraw-Hill Dictionary of Engineering Second Edition

straight bevel gearsearch unit in a wavetrain which travels perpen- lathe so that the diameter is constant over thedicularly to the test surface. { strāt bēm } length of the workpiece. { strāt tərniŋ }straight bevel gear [DES ENG] A simple form of straightway pump [MECH ENG] A pump withbevel gear having straight teeth which, if ex- suction and discharge valves arranged to give atended inward, would come together at the inter- direct flow of fluid. { strātwā pəmp }section of the shaft axes. { strāt bevəl gir } straight wheel [DES ENG] A grinding wheelstraightedge [DES ENG] A strip of wood, plas- whose sides or face are straight and not in anytic, or metal with one or more long edges made way changed from a cylindricalform. { strātstraight with a desired degree of accuracy. ¦wēl }{ strādej } strain [MECH] Change in length of an object instraightening vanes [ENG] Horizontal vanes some direction per unit undistorted length inmounted on the inside of fluid conduits to re- some direction, not necessarily the same; theduce the swirling or turbulent flow ahead of the nine possible strains form a second-rank tenorificeor the venturi meters. { strātəniŋ sor. { strān }vānz } strain axis See principal axis of strain. { strānstraight filing [ENG] Filing by pushing a file in aksəs }a straight line across the work. { strāt fīliŋ } strain ellipsoid [MECH] A mathematical represtraight-flowturbine [MECH ENG] A horizontal- sentation of the strain of a homogeneous bodyaxis, low-head hydraulic turbine in which theby a strain that is the same at all points or ofupstream and downstream reservoirs are conunequalstress at a particular point. Alsonected by a straight tube into which the runnersknown as deformation ellipsoid. { strānare integrated, with the generator placed directlyilipsȯid }on the periphery of these runners. { strāt ¦flōstrain energy [MECH] The potential energytərbən }stored in a body by virtue of an elastic deformastraightjoint [BUILD] 1. A continuous jointtion, equal to the work that must be done toformed by the ends of parallel floor boards orproduce this deformation. { strān enərjē }masonry units and oriented perpendicularly tostrainer [ENG] A porous or screen medium usedtheir length. 2. A joint between two pieces ofahead of equipment to filter out harmful solidwood that are set edge to edge without tonguesand grooves, dowels, or overlap to bind them.objects and particles from a fluid stream; usedAlso known as square joint. { strāt jȯint }for example, in river-water intakes for processplants or to remove decomposition productsstraight-line mechanism [MECH ENG] A linkageso proportioned and constrained that somefrom the circulating fluid in a hydraulic system.point on it describes over part of its motion a{ strānər }straight or nearly straight line. { strāt ¦līn mekstrain foil [ENG] A strain gage produced fromənizəm }thin foil by photoetching techniques; may bestraight-line motion [CONT SYS] A method ofapplied to curved surfaces, has low transversemoving a robot between via or way points in sensitivity, exhibits negligible hysteresis underwhich the end effector moves only along segloads.{ strān fȯil }cycling loads, and creeps little under sustainedments of straight lines, stopping momentarily forany change in direction. { strāt ¦līn mōshən } strain gage [ENG] A device which uses thestraight piecework system See one-hundred-perstrainto measure pressure. { strān gāj }change of electrical resistance of a wire undercent premium plan. { strāt pēswərk sistəm }straight proportional system See one-hundred-perometerwhose operation depends on the factstrain-gage accelerometer [ENG] Any acceler-cent premium plan. { strāt prəpȯrshənəlsistəm }that the resistance in a wire changes when it isstraight-run [CHEM ENG] Petroleum fractions strained; these devices are classified as bondedderived from the straight distillation of crude oil or unbonded. { strān ¦gāj akselərämədər }without chemical reaction or molecular modifioffour strain gages, cemented to a stressed partstrain-gage bridge [ENG] A bridge arrangementcation. Also known as virgin. { strāt rən }straight-run distillation [CHEM ENG] Continuresistanceand two show decreases when thein such a way that two gages show increases inous nonreactive distillation of petroleum oil toseparate it into products in the order of their part is stressed; the change in output voltageboiling points. { strāt ¦rən distəlāshən } under stress is thus much higher than that forstraight strap clamp [DES ENG] A clamp made a single gage. { strān ¦gāj brij }of flat stock with an elongated slot for convenient straining beam [CIV ENG] A short piece of tim-positioning; held in place by a T bolt and nut. ber in a truss that holds the ends of struts or{ strāt ¦strap klamp }rafters. Also known as straining piece.straight-tube boiler [MECH ENG] A water-tube { strāniŋ bēm }boiler in which all the tubes are devoid of curva- straining piece See straining beam. { strāniŋture and therefore require suitable connecting pēs }devices to complete the circulatory system. strain rate [MECH] The time rate for the usualAlso known as header-type boiler. { strāt ¦tüb tensile test. { strān rāt }bȯilər }strain rosette [MECH] A pattern of intersectingstraight turning [MECH ENG] Work turned in a lines on a surface along which linear strains are536