(,No Model.)
N. TESLA.
3 Sheets-Sheet 1.
METHOD OF OBTAINING DIREOT FROM ALTERNATING OURRENTS.
Patented Oot. 22, 1889.
No. 413,353.
J
P!'Zenrfte.s :
?1"'~-!~~ ~,T.~~
N. PETERS.
Pll0Io-Lilhol\r~ph .. r. W~'hlngton.
D. C.
I'No Model.)
3 Sheets-Sheet 2.
N. TESLA.
METHOD OF OBTAINING DIREOT FROM ALTERNATING OURRENTS.
No. 413,353,
mtnd".s~:
~~Z~ t-~
Patented Oct. 22, 1889.
(No Model.)
N. TESLA.
3 Sheets-Sheet 3,
METHOD OF OBTAINING DIRECT FROM ALTERNATING CURRENTS.
No. 413,353 ,
Patented Oot. 22, 1889.
If{bz:;foe.s :
~~~z..f~ :r~
N. P£T(RS, Pl,da.lithQg",pher. ,,,t,\\h'"glcn.
n. C.
UNITED STATES PATENT OFFICE. XIKOLA TESLA, OF 1\fE\\' YORK, N. Y., ASSIGROR OF TWO-TIIIRDS TO ALFRED S. DIWWN, OF SAME PLACE, AND CHARLES F. PECK, OF EKGLEWOOD, XEW JERSEY. METHOD OF OBTAINING DIRECT FROM ALTERNATING CURRENTS. SPECIFICATION' forming part of Letters Patent No. 413,353, elated October 22, 1889. AF)llication filed June 12, 1389, Serial No, 314,069, (No model.)
5
10
15
20
25 .
30
35
40
45
50
To all who]))., it 7JHC!} concern: He it known that I, NIKOLA TEsLA, a subject of thc ElllperOl'of Austria, from Smiljan, 1,ika, bonIer country of Austria - Hungary, temporarily ref'ic1ing in Xmr York city, in the State of Xew York, havc invente(~ a certain ne'v and useful Improvement in Methods of Ol>tnining Direct. from Alternating Currents, of which the following is a specification, refcrence beillg had to the drmYings accompanying and fOl'miug a paet of the same. In Deady all the more impol'tant industrial applications of electricity the current. is produced by dynamo-electric machines driven by power, in the coils of which the currents developed are primarily in reverse directions or alternating; bnt as very mauy electrical devices and systems requirc direct cun-ents, it has been usual La correct the current altel'nations by means of a commutator, instead of taking them off directly from the generating-coils. The SL111Ct'iol'ity of alternating-cnrrent 111achines in all cases where their cnrrents can be used to a(hantage renders theit el11ployment very (lesirable, as they may ue much more economically constructer1 and operated; and tbe ob;iect of this my prescnt, illYClltion is to J1rO\'ic1c mcans for directing 01' COllvcrting at will at onc or marc points in it cinmit alternatiug into direct currents. Stated ~ls broac1ly as I am able to express it, my invention consists in obtaining direct from alternating' cl1lTents, 01' in directing the waves of an altel'l1ating Cl11'l'ellt so as to produce direct or substantially direct currents by developillg or producing in the bl'allchcs of a circuit including" a souree of alternating currents, cither permanently 01' periodically, Hnd by electric, electro-magnetic, 01' magnctic agencies, manifestations of energy, 01' ,,,hat may be termed active rcsistances of opposite electrical· character, ·whereby the currcnts or current-waves of opposite sign will be diycrtcd through diffcrent circuits, those of one sign passing over one branch and those of opposite sign over another. r may consider herein only the case oE a circnit divided into two paths, inasm.uch as any furthcr suhdivision im'olyes merely an
extension of the general principle. Selecting, then, any circuit throllgh which is flowing an alternating cnrrent, I di\'ide such circuit at any desired 110int into two branches or paths. In aile of these paths I insert some device to 55 create an elect.fo-motive foree counter to the wayes 01' impulses of current of one sign and a similar device in the other branch which opposes the waves of opposite sign. I\SSUme, for example, that these devices are batteries, 60 primary or secondary, OL' continuous-current dynamo-machines. The wave::; or impulses of opposite direction composing the main current ha\'e a natural tenrlellcyto divide between the two branches; but by reason of the opposite 65 electrical character or cffect of the two branches one will offer an easy passage to a CUl'rellt of a certaiu direction, while the other will offer a relatively high resistance to the passage of the same current. rrhe result of 70 this disposition is, thnt the waves of curl'ent of one sign will, pm·tty 01' ,yholly, pass oyer one of the paths or branches, while those of the opposite sige pass over the other. There mav thns be olJtained from an alter- 75 nating' clllTent two or more elirect currents WithO~lt the employmcnt of any commutator such as it has been heretofore regarded as necessary to nse. 'rhe current in either 'branch may be used ill the same way anel 80 for t.he same purposes as any other direct cunent-thnt is, it lllay be mac1e to charge sccollClary batteries, energize electro-magnets, or for any other analogous purpose. In thc drawings 1 haye illustrated some of 85 the yarions way:,; in which I lllily carry out this in ven ti01l. The sevcml Ilglll'C" it 1'C diagrammatic ill chamctel', aIlll will 1)8 (lescl'ibc(l in detail ill their order. Figure 1 reprcscnts a plan of (lil'ccting the alternating currents by means of devices pmelY
