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UNITED STATES PATENT OFFICE. NIKOLATESLA, OF NEW YORK, N. Y. MANUFACTURE OF ELECTRICAL CONDENSERS, COILS, &c. SPECIFICATIONformingpartofLettersPatent,No.577,671,datedFebruary23,1897. AplicationfiledNovember5,1896, SerialNo.611126, (Nomodel.) To al whon, itnailyconcert: inVacuum andSubsequentlysubjectingitto BeitknownthatI,NIKOLATESLA,aciti orsolidifyingitunderpressure. Thedegree ZenoftheUnitedStates,residingatNewYork, ofexhaustionorofpressuremayvary,very55 inthecountyandStateofNewYork,have goodresultsbeingsecuredbyavacuumof inventedcertainnewandusefulImprove abouttwenty-nineinchesandapressureof mentsintheManufactureofElectricalCon aboutonehundredpounds. Itmaybestated, densers,Coils,andSimilarDevices,ofwhich however,thatwhenhydraulicpressureisap thefollowingisaspecification,referencebe pliedverymuchhigherpressuresarereadily inghadtothedrawingwhichaccompanies Securedandareofadvantage. O andformsapartofthesame. Inordertofacilitatethecarryingoutofthe Myinventionisanimprovementintheman process,Ihavedevisedasimpleanduseful ufactureofelectricalcondensers,coils,and apparatus,whichisillustratedpartlyinsec otherdevicesofasimilarcharacterinwhich tionintheaccompanyingdrawing. Asthe Conductorsdesignedtoformpathsforcur partsofsaidapparatusarealofWell-known rentsofhighpotentialarebroughtintoclose construction,theapparatusasawholewill proximitywitheachother. Amongsuchde befullyunderstoodwithoutafuldescrip Vicesareincludedmanyformsofcondensers, tionofitsdetails. transformers,self-inductioncoils,rheostats, Aisatankorreceptaclethatmaybeclosed7O and the like. Ithasheretoforebeenshownbymethatthe C,surroundingavesselB,preferablywith efficiencyandpracticabilityofsuchdevices slightly-slopingsidesandprovidedwitha areVerygreatlyenhancedbytheexclusion tubeorpipeD,openingintoitnearitsbase. ofairorgasfromthedielectricseparating Thecondenserorotherdevicetobetreated theconductorsorremoteportionsofthesame isplacedinthevesselB,andaroundthere conductor;andtheobjectofmypresentim ceptacleispackedasuitableinsulatingma provementistoSecureSuchexclusionofair terialinquantitysuficientwhenliquefiedby inasperfectamanneraspossibleinacon heattoflowthroughthepipeDintotheves venientandpracticableway. TothisendI SelBandfilthespaceinthelateruptothe placethecondenserorotherdevicetobe topofthecondenserorotherdeviceplaced treatedinareceptaclefromwhichtheair therein. maybemoreorlesperfectlyexhausted,and ItisdesirabletorunintothepipeDenough WhileinvacuumIintroduceaninsulating meltedmaterialtofilitbeforeusingtheap Substance,whichliquefieswhensubjectedto paratusandtomakethepipeofapoorheat heat,Suchasparafin,whichsurroundsthe conductingmaterial,sothatalitletimewill 35saiddeviceandfindsitsWayintoitsinter elapseaftertheheatisappliedtomeltthe Stices. Saturatedwiththeinsulatingmaterial,itis Whentheapparatushasbeenthuspre allowedtocolofusuallyuntilthematerial pared,theairfromtheinteriorofthetankA 40 beginstosolidify. Airisthenadmittedun iswithdrawnascompletelyaspracticableby derpressuretothereceptaclecontainingthe anair-pumpEandsteamispassedthroughthe deviceandthepressuremaintaineduntilthe coilC. Inordertopreventaccessofanyof Wholemassofinsulatingmaterialhassolidi thevolatileconstituentsoftheinsulatingma fied. Bythistreatmentthepresenceofair terialtothepump,acondenserF,withacool Orvacuousspacesinthedielectric,whichare ing-coilG,isinterposedinthepipingbetween otherwiseliabletoformbythecontraction thetankandpump. Afterapartialvacuum oftheinsulatingmaterialwhencoling,is hasbeensecuredinthetankAandthelique prevented. fiedinsulatingmaterialhasbeenrunintothe IOC Anyplanmaybefollowedorapparatusused vesselBthepumpmaybestoppedandthe forSecuringthetwoconditionsnecessaryto tankconnectedwithareceiverH,fromwhich theattainmentofthedesiredresult;thatis theairhasbeenexhausted,andtheappara toSay,applyingthefluidinsulatingmaterial tusallowedtostanduntilalltheinterstices air-tight. Withinthistankisasteam-coil materialinthetankAbeforetheflowthrough Whenthedevicehasbecomethoroughly thepipebegins.PDF Image | Nikola Tesla Manufacture of Electrical Condensers Coils 577671
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