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Thi• in"fent1on relates in ceneral to electrical 8Jsteme in which 

are lacerporated a plural! ty or· clrcul ti. and cont•plate• the· provision . . . . . 

of macban1a tor ftl'11Dc ~he electrical contl'.nuitl~i and olrcu1t relatione 

of 111Ch a a7etea 1D an irregular or· a~ertodlc manner. 

Aa distiDguiebed from the 1dea ot controlllJ:JB the processes ot the 

a7atem in an erderly sequence. the present.in°"ntion has ·the opposite tunction AUd proposes means to randomise ~be operations of such a system. 

An obJect o~. tbis invention 18 to provide a ·aaeai;ia o~ selec0ting 

troa a pluralltJ ot available electrical Ci~euits a single circuit at 

ran4om, wbich elec:trlcal circuit will. be operatt·w tor e. period ot ·ti.me.. 

the length ot whlcb depends ·upon. one C?1' aevera.J. ftr1able tacton. 

Anetber obJeo\ of tbia 1n'f8n~ion 1a ·to proTlde apparaiua tor -.ar,ring 

· the qeecl et rohtlJJB bo41•• b7 meNUJ of a friction 4r1 ve macha.nle working 

in caa.funct1on with cam wheela of lrreplar outU.ae and ope~:ti veJ.7 cool'd.1· 

nateo. .w1tb a 41tterent1al ceattnc a11tea tor the purpose ot open.lug and 

oloe1Dg e1ec~r1ca1 circuits tor ~lng perto41 ot time. 

A tuther obJect ot tide 1n'f8nt1on is to provide a dance, to be 

use4 in eormection •1th or a.s an attachment tor, a aortiag 4eT1ce, euoh 

a• a card eortiDS.deTice. tor eelectlag trom an aaeortlent ot punche4 oar4e, 

a Ht ot carde which &re. chosen at random from the basic assortment. 

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!Declassified and approved for release by NSA on 09-06-2013 pursuant to E. 0. 1352§ 

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In order that the invention and 1ta. mode o! e.ppl1cat ion U1" be 

readil.7 ~derst.ood, there is d1eclosed in the accompanying drawing and 

in.the detailed following description thereof', one form or embodiment of 

the 1nffilt1on. 

In the drawing, the single Figure ahawa ln s cherna tic form 

an apparatUs for car171.Ds out the ln'Vention • 

'Referring to the drawing, 1·:h a gear. dr1Ten bf a~ prime .mo'Wtr 

such ae a motor· JI a gear 1 me:shee with the two geRrs 2 and 2' • having 

different D1Jll'lbers of teeth. Gear 2 1• fixed ·w Bhan 3 and d.r1,aa the 

WO D!l gear 4, WbiCh in turn, through the 1rain Of pare 61 6, 'I, dri "188 

abaft a. on wblch is mO'Dllted cam 9 ot irregular outline. Boller 10 

rides on the periphe17 of oam 9 and eervea to ~.,. lewr 11, thro~ a 

8Ucceaaton ot angles which are d.etarm!ned 'bl the depreaa10ns and elevations 

ot oa.m 9.. The tree end or lever ll is OOl1J'180tad. bx a pln 12 to a collar• 

lS which is free to elide 'DP and down on shaft 3 but la independent of 

the latter in its rotation. 'lbe ~er end of collar l~ preseea ag&inet 

disk 14", which is alao mounted on shaft 3 but, b7 ~ aio~ and bar arr&11ge111en~, is dr1Ven by aha.ft 5. Spring 15 eerwa '\o keep tbe aasembl.y 1.2, 

13, and 14 in pl.&Ce on tbe sh&tt S and al.10 to cause '\he roller 10 to 

follow the outline of CN!l 9. Disk 14, 'b7 frictional effect, drive• wheel 

16, keyed to shaft 17 sq that ae shaft 3 turns disk 14 iurna and •Ude• 

up and down aga1net the face ot wheel 16, oauai.ng abaft 17 to rot•te at . . 

conetantly vn.ry1ng speeds as the roller 10 rides on the periphery ot cam 

9. On the aha.ft 17 la mounted the eonmmtator gene:rallJ" 4ea1gna:ted as 18 

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and a conuct wheel l~ •. provided Ylth a pl\11'1\lit7 of oontac1;8 20, 

c;onn.ected in a random manner to the commutator rings -21,· 22, 23, 24·, 

26.. Jleet~ _8«f11nst ~ commutator· rlaBB a.re CC?lleotora 261 which a.re 

corm.ecte4 to eon4\1Ptora 27 leading to 1D41V14ual c1rcuite, which circu1ta ma7 include ant conventional m.eene or 1netrumentalH1ee euggaste(I: 

8Chematic&J.ly ae a' ~3 for ut1ltm1nf; the ra.ndom1tlng tuncttc:m ot the 

present invention. 

!be aetion of the members 2 to 17 inclusive ia the sarm aa 

that of the members 2' to lV~. Shat' 17' totatee awi~ch arm so. carrying brush 31 which sweeps over. th& contacts· 20 as it rots.tee. · il'USh 

30 is connected to the common-return cond'QCtor 32 for the o1rcu1ta . . ).. It1) B2• B3, B.o., Ba are selected_ 1n the order of the· contacts 20 

0'1 wheel 19• but each circuit la· operative tor a different tnterTal ot 

t~me. 

111 the d.rmriJJB, apecitic mechan1ca1 principle• are shown 

for •tfectt.ng tbe movei:.ente or the ~arious perts or· th~ apparatus.How-

. ever, tbcee are Phown only for the purpose of demonetrRt1on of the principlee incorporated in thia 1nvent1on, and it is ~ointed out that ~ 

other mechanical means f'or 'f&r:lin6 the angu!.a.r Yelocity of the commutator 

18 rotating with contact dlalt 19 a.n4 the contact arm 39, either .-pa:-atel.7 

or conJotntly,· •ill et:reot the result desired. It 11 also pointed out 

'\bat, while five commutator ring·e are 4ep1cted in the drawiug, e.rq number IU.'-3. 'be used. and '\hat the number ot contacts a.n ihe race of the 

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disk 19 ma7 be equal to the number of contaet r1ncs or greater by arq 

practicable nurilber. It \711:!. also '.l)e noted that cams 9 s:nd 9·' are 

intended :to be detachable a.nd i.nterchMgeBble,. means being shown in 

the drawing to fa.cili tate removal for that purpose-. or to permit 

nbsUtution of othar came oi different sbape. 

Cbingee,. modifications and equivalent a.rrQ.DGements are 

contemplated within the scope or the invention as defined by tbe 

ap1)ended cla.ir:ls : 

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Ye Ola.Sat -. 

1. Iii. a mecbant• o_. tile oharaeur 4eaor1bed f~r ooatrolling ~ 

•l••'rlo eil'OUS.,. 1f9t~ a ••' ·o.t •itchlltc cleni:a JlavlzW aovable con11Mtl111 •1-til for e1ta-.1ab111g a plvaJ.tt1 ot e1rcuf.t nlatlom 1· .&114 

..... tor "INJirlC tile nlatloa between·. •aid: ~1-nta to attec'l' a rancba 

•J8ra\1on ot the 1111tem. 

I. A· mecban1• of the Chanotar .4eaerlbad·, coaprla111g a •lrSDg I o o • ' 

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91a\ea an4 111.ol'Udlag therein a eat ot .•l tcb!.118 ~enc•• p~ov14e4 wlth 

. ••bl.• eontacta for eatabllebing a· JlvalltJ' of clrcult OODll&O' lone 1 

aaO.· ••• tor ~huclnc th4' relation lletw•n laid oontacta for •rylng 

J•r1e4e o~ tl• to !8tfeo\ a 1'Ul4oa OJ.&rat ion of .the a7a'tem. 

. . .. 3. Ia a meohanl• for l'all4all!.111tfr ·\be 011era'1on of an elea-

. . tr1ca1 •1•t•, a· ae\ O·f ~1 tobtq 4e'floe1 proTS.4e4 •1 \b rela't·l ~~ 

••'bl• oaataot eleaea~• for ea,a\118h1ng a pl\U'&llt7 _of clrn.lt relatla• 1a aaitl 91etem1 · an4 aa.an• tor oonUmaoul1 ADA &J18rlo4.tcall7 -*1l,. 

.,, 

lite the relation beween aa14 •leaente. \ 

4'. In a moluml• of the cbaracter 4eeor1'be4. a· a1eetr1o 

otre111'\ •7"• eumprl•Sns •ltohlDC d.e'llon provlcle4 •1th.eleoh1a&1 

eoataeta, aid 4n1c•• ~S.ng rotatable wt th respect to each other tor 

eeta,lllhiJSI a plv&11t7 ot cll"01llt eoi1118otloas r a trlotiaa 4riw .•obanl•. 

tor eaob of' aa14 deTtcee. an4 ln.oluding maan1 for 11ldepen4entJ.7 !Ul4 41tteratiall.J O)eratlng eaid •ahanl- to atteot a rana.oa operation of tlJ8 

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s. !l&a..'l'le for ranilom1~1ng the eonti.nut;Uea of &."l electrical syat, 

compr1;1na &."l s.rr~ement of circuits i1JCludtng a aet of ~latiwlJ 

mow.ble ~1tch1ni; 4e~i-e:Ga pro'tided with contecte tor establiehing a 

plural1t, of different circuit connectlou ; meau tor 'ftlrying tbe 

.circuit connections., c.e>mpr1e11)6 f'l"iction~ tlrt"8 aecbanisms ope1•ablo 

1.D4epend~i th sn1d •l tebil)g d.eY'ices; and moons tor chooglag tbs 

rnte of mo~t of sud mecbe.n1111s to ef'teet a random operatioa or· 

the a1stem. 

6. In a mechanism of the -character described,. a. pair of rotating 

bodies associated for ope.ratlM moveoen\. rela.tin. to one another; fr1Ct1an 

ctrtwa arranged to aove aaid bocUes 1ndepeudentq; and meane inelulizrg a 

8J11tell of ~ifterential gearing and cams ot 1negalar contours ·operat198~ 

coor41D&ted w1\b aa1d paring· and with each of ~id clr1"8·a ·1IJ41vtcluall1 

? • · A lf18Cbanism ot the cbftmoter dellC!"ibeG for eontroll1ng the 

operatiou _of an electrical e3stem. C03prlsllr6 " rotatable oOIDmlt'stor 

pJ"OTided with contact eleraents. and a rotatable, swi'tchlng de~ee operable 

with said elements ter esta.bliah:1Jt6 a plural Uy ot c,1rcu.1t connection• 1 

am meau to ettect a .random opera·uon ot S"itl ;Qstea comprising pariJt8' 

tor driving ae.id commutsto-r Em4 ea.id swUcblng device independentl:. and 

mes.ns tor diffarenttaUy controlling ·the operat.1.on o.f the ~r1Jtg • 

. e. A comb1~t1oa accordins t:o clam'• m wh1ch tbe last uma4 · 

aeana lrtclude:s 0B1Ds ot irregular· contours 1n41•1dual.11 operal»l• w1'b eal4 , 

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9 •. A combination accordbg to claim "l, in which the last aamecl 

._a 1nolu4•~• o•• ot ditteren.' irregular o cmtours. 

_.10. Ill a. meahanlea tor random11ing t.he c>peratlon ·of an ~lectric·al 

. 111t~, · 1a corabtna.tion. a rota ta~le comma.ta.to~ prov~ded wl ti.l contact 

elements_ Utt a r01ut.:t&bl~ · conducto.:r operable •1th •a!:d elements tor es- . . 

~bUsh1D&' a p1val1t7 of olZ'QUit connect!one1 friction v1ve·a tor opera.tins ea14 eGlllllltator and said conductor 1ndepen-dent1.1l and means .·1no1wU.ng 

41ffer1Wlt1al. gearln&, .tm.4 oam,a of. S.rregula.r contours operat1 veu eoor41aate4 

with nicl gearing and. 1n41 viduall7 with each of said 4,ri vee to T&r1 the 

ell"O'lllt OGDD8et1one aperiod1call7. 

1.1. A raadomtllns mechanlBlll ot the Oharfl.cter described.· comprising 

a n'\~talfle cemmt&tor proY1de4 with a pluraU.t7 ot. contact .elements an4 · 

a rote.ta~le eendUD'\or _epenble wl tb_ eai~ elements ~or esta'bliehlng a pl~. 

al117 of o 1reu1 t ommeetione. J and means -tor .contimaousl7. a.ad. 1Z'NBUlarl7 

ellanglzrg the relati'l'9 speed ot eald COl!lmltator and said conductor to '9arJ 

t.be c1rov.U connectians aperiodically .. said meane i:ncll.U11ng a friction d1'1"8• 

epera,iTS with the comnutator and conductor in411'1dually, ~ams ot irregular 

~ontoute operat1ye:i, coordinated with each drive in.dependently. and gearing 

tor actuating 'he earns 41tferep.tiall7 .• 

12. .l maehaniaa tor centrolling the operation at ~electrical 

a71tea •. eompr1a ing rele.t1wl1 rotatable switching devices provided with 

c,ooperatS.U. centa.et elements tor eetllbl1sh1ng a plurall tJ" of circuit conaeotlonsa and. meus tor CDD.tlnuoue11 and a;erioc:Ucally var71JJB the_ rela.th• . . 

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f;pead of rotation or :said. •itching de•!eea ~ etfec t random permuta tiomp 

of the Circuit ·connee·tione •. sa14 m8Ul8 comprising change epee4 drhea in41 vidna.111 operaU ve with said _tnri 1.ch'izlg de'fices,. in te:rcbaD6Mble came ot 

dif'ferea~ trregul~ csontours 1n4ependentl1 .operative. wt th said 4ri vee . ., .aml 

a 4itferf:n~1u ~:till$ s7steni tor· i>pers.ti1ig the cams and driws 1n oppealllg 
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