Designation:F471–76(Reapproved2002)StandardTerminologyRelatingtoCombinationLocks1ThisstandardisissuedunderthefixeddesignationF471;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONAlltermsarelistedalphabetically.Whenasubsidiarytermisdefinedinconjunctionwiththedefinitionofamoregenericterm,analphabeticallylistedcrossreferenceisprovided.bolt—thecomponentorpartofacombinationlockthatlocksorblocksanothermechanismfromoperatinguntilitisretracted.burglar-resistantspindle—atapered,shouldered,orotherspeciallydesignedandtreatedspindleintendedtoresistpunching,pulling,anddrilling.combinationchangekey—akeyusedinresettingakeychangecombination.cover—thesectionofthelockcasedesignedtoberemovedforaccesstocomponentswithinthecase.curb—acomponentforholdingthetumblersinplace.dial—anumericallycalibratedpartusedtoalignthetumblersandoperatethelock.dialandring(spy-resistant)—adialandringdesignedtorestricttheunauthorizedobservationofcombinationdialing.dialshield—ashroudtoshieldthedialfromunauthorizedobservationofcombinationdialing.drivecam—acamthatactuatesthetumblersbyadrivepinandisgatedtoretractoracceptalockingmechanism.drivepin—aprotrusiononorthroughadrivecamortumblerwhichdrivesorturnsthenexttumbler.fence—apartoftheleverthatfitsintotumblergates,permit-tingthelevertoengagethedrivecam.fly—apartthatmakescontactwiththedrivepinforrotationofthetumblers.gatecover—acomponenttopreventtheleverfromenteringthetumblergatewaywhilechangingcombination.handofcombination,lockinstallation—atypeoflockinstallationthatisdeterminedbythepositionofthelockboltviewedfromthecoversideofthedoor,thatis,verticalup,verticaldown,righthand,orlefthand.index,changing—themarkonthedialringusedwhenchangingthecombination.index,L.O.B.C.(lockedonbycombination)—themarkonthedialringusedtosetthecombinati...
