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MechanismandMachineTheory37(2002)851–876www.elsevier.com/locate/mechmtDefectsinlinkmechanismsandsolutionrectificationShrinivasS.Ballia,b,*,SatishChanda,*aDepartmentofMechanicalEngineering,M.N.RegionalEngineeringCollege,Allahabad211004,UP,IndiabBasaveshwarEngineeringCollege,Bagalkot587102,Karnataka,IndiaReceived2March2001;accepted22January2002AbstractTheliteratureavailableonthevariousdefectsinthelinkmechanismsandsolutionrectificationsincefromFilemon(1967)tillBalliandSatishChand(2002)isreviewed.Itprovidesgoodinformationaboutbranchingdefect,Grashof’sdefect,orderdefectandcircuitdefectsinanorganizedmanner.Theknowledgeofthesedefectsenablesthedesignertosynthesizethedefect-freelinkagemechanisms. 2002ElsevierScienceLtd.Allrightsreserved.Keywords:Defectsinthelinkmechanisms;Solutionrectification;Branchingdefect;Grashof’sdefect;Orderdefectcircuitdefect;Transmissionangle;Mechanism;Linkage;Synthesis1.IntroductionSincefromGrashofsettherulesforidentifyingandclassifyingthefour-barmechanisms[22]andBurmester[92]presentedthecenterpointandcirclepointcurves,thedefectsinthemecha-nismshavebeenthesubjectofseveralstudies.Eventhoughaveryfewworksarepublishedbe-tween1883and1960,thebreakthroughtookplacewhenFilemonproposedagraphicalconstructiontoeliminatethedefectsin1967[162].Sincethennoyearwentwithoutthepubli-cationofapaperondefects.Insixtiesabout25,inseventiesabout41,ineightiesabout54whereasinninetiesasgoodas40workswerereported.Thusthemajorstudyhasbeenstretchedover40yearsbymorethan70researchersallovertheworldandrecordedintheformofpapers,M.S.andPh.D.theses,reports,patents,bulletinsandotherpublicationsnumberingmorethan170inallgraphical,numericalandcomputationalmethods.Theconstantgrowthofthesubjectshowsitsimportanceinthefieldofsynthesis.Filemon[14,89,162–169]appearstobethefirstpersontoaddressmanyofthedefects.Waldronetal.,Barkeretal.,andGuptaetal.arethemajor*Correspondingauthors.Tel.:+91-532-445103x1110;fax:+91-532-445106/445107.E-mailaddresses:ssballi@rediffmail.com
