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Nikola Tesla System of Signaling 725605

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Nikola Tesla System of Signaling 725605 ( nikola-tesla-system-signaling-725605 )

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UNITEDSTATESPATENTOFICE. NIKOLATESLA,OFNEWYORK,N.Y. SYSTEMOFSIGNALING. SrcCIFICATIONformingpartofLetersPatentNo.725,605,datedApril14,1903. . AplicationfiledJuly16,190,SerialNo.23,847,(Nomodel.) Toat,whomitmayconcern: fromtuningthecircuits. Itbeinganim BeitknownthatI,NIKOLATESLA,aciti perativerequirementinmostpracticalap ZenoftheUnitedStates,residinginthebor plicationsofsuchsystemsofsignalingorin oughofManhattan,inthecity,county,and teligencetransmissionthatthesignalsor StateofNewYork,haveinventedcertainnew messagesshouldbeexclusiveorprivate,itis andusefulImprovementsinSysteinsofSig highlydesirabletodoawaywiththeabove maling,ofwhichthefollowingisaspecifica limitations,especiallyinviewofthefact, tion,referencebeinghadtothedrawingsac whichIhaveobserved,thattheinfluenceof companyingandformingapartofthesame. powerfulelectricaldisturbancesuponsensi Incertainsystemsfortransmittinginteli tivereceiversextends,evenonland,todis d ableapparatusareconveyedthroughthenat andtoenableagreatnumberoftransmitting 5uralmediatoadistantreceiving-circuitca andreceivingstationstobeoperatedselect pableofrespondingtotheimpulses,and ivelyandexclusivelyandwithoutanydan therebyefectingthecontrolofotherappli gerofthesignalsormessagesbeingdisturbed, ances. Generallyaspecialdevicehighlyintercepted,orinterferedwithinanywayis1o sensitiveisconnectedtothereceiving-cir theobjectofmypresentinvention. cuit,whichinordertorenderitstilmore Broadlystated,thisinventionconsistsin beingaffectedbyextraneousdisturbancesis transmittingtwoormorekindsorclasesof carefullyadjustedso.astobeintunewith disturbancesorimpulsesofdistinctivechar thetransmiter. Byascientificdesignofthe acterwithrespecttotheirefectuponare 75 sendingandreceivingcircuitsandotherap ceiving-circuitandadistantreceiverwhich paratusandskilfuladjustmentofthesame comprisestwoormorecircuitsofdiferent theseobjectsmaybeinameasureattained; electricalcharacterorseverallytuned,soas giblemessagesorgoverningthemovements tancesofmanyhundredsofmiles,andcon andoperationsofdistantautomataelectrical sequentlyinaccordancewiththeorystil impulsesordisturbancesproducedbysuit fartheronsea. Toovercomethesedrawbacks susceptibleandtoreducetheliabilityofits thecombinationofmeansforgeneratingand butinlongexperienceIhavefoundthatnot toberesponsivetothediferentkindsor withstandingalconstructiveadvantagesand clasesofimpulsesandwhichisdependent experimentalresourcesthismethodisin foroperationupontheconjointorresultant manycasesinadequate. ThuswhileIhave actionofthetwoormorecircuitsorthesev succeededinsooperatingselectivelyunder eralinstrumentalitiescontroledoroperated certainfavorableconditionsmorethanone thereby. Byemployingonlytwokindsof hundredreceiversinmostcasesitispracti disturbancesorseriesofimpulsesinsteadof85 35 cabletoworksuccessfullybutafew,the one,ashasheretoforebeendonetooperate numberrapidlydiminishingas,eitherowing areceiverofthiskind,Ihavefoundthat togreatdistanceorothercauses,theenergy safetyagainstthedisturbinginfluencesof available in the tuned circuits becomes othersourcesisincreasedtosuchanextent smallerandthereceiversnecesarilymoredeli thatIbelievethisnumbertobeamplysufi cate. Evidentlyacircuithoweverwelcon cientinmostcasesforrenderingtheex structedandadjustedtorespondexclusively changeofsignalsormessagesreliableand tovibrationsofoneperiodisapttobeaffect exclusive;butinexceptionalinstancesa edbyhigherharmonicsandstilmoresoby greaternumbermaybeusedandadegreeof lowerones. Whentheoscilationsareofa safetyagainstmutualandextraneousinter95 veryhighfrequency,thenumberoftheef ferenceattained,suchasiscomparableto fectiveharmonics,maybelarge,andthere thatafordedbyacombination-lock. The ceiverconsequentlyeasilydisturbedbyex liabilityofareceiverbeingafectedbydis traneousinfluencestosuchanextentthat turbancesemanatingfromothersources,as whenveryshortwaves,suchasthosepro wellasthatofthesignalsormessagesbeing OO ducedbyHertziansparkapparatus,areused receivedbyinstrumentsforwhichtheyare litleadvantageinthisrespect,isderived notintended,may,however,bereducednot

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