• I 

.... 

REF ID:A10513. 

P E 'l' I T I 0 N 

'j:O THE CGMl-ilSSIO!rER OF 1'A.TJi.::NTS: 

Your petitioner...__, _m111 ... r ... rrJ.ad:llNl. pd ii.. O..~~-M---

ci tir;ella- of the United States re•iding at Mia MU9 ld....AA.clfl..jh__t.Qn~~-

in the aau D: J>t~•J.A..i";T:r~·nd. eA:d:cnrf !Wil'Jt,.W'~.--.... nk..1.1 

.and whoa& post-office addres!; Ii ----~ lfuhfprton.~.P... .. J2.~ Aml~lh..l. U.ltoJl Oovt -~lank, .. ,l• .tler.aey ••. rupJP~~1'.Dl3..= .. --Ji:rH,Y_ that Letters Patent TIIEIY be 

grnnted t:'l ··-··· .tJ:wn. -~--.--.,~\-lthl'l11t pr.;rmenl: of fe6, purP-wmt .to thr: prov15lono 

ot tr.e .Ac:t. of Mm·r:h 3, 1683, c. 14.3i U. S. Stat11tea 1 XXll, P• 625, i!b H.Dlt!nriea. 

·1...y the A.et of ~ril 30 1 1928, for the improvement in_ _ __ ...... 

· JIJll• . ..tar: Bnobhlrinl. Pu&Wl~t ·-~~------------~·· set forth in the onnexed Specification. 

And----~- hAreby irrevocably give_ control of~ c..~·~11.i<"'ation. 

1~.,. Letters Patent i.o the Secreti:try of WRr, and enpoint __ 't11lliam D. H.nl 1. · 

•.1h(Hrn post-office tu\d:ress is care of the Chief Signal Officer, Muni tion.s 

1i11ilding, ~ashingt.on, D. C., attorney with full power of su~tJti tution and 

r~vncation to -proser.nte thiR appUca.tion. to make Bl terat1ons _u1J. amendmer&tu 

\.!1a1·e1n. to sign _._,..thnr._ M·.me....1.. to the dre.w1ngR, to reoet ,,.~ the Letters 

J.•E~tent, aud to trrnsnct all businesa in the United States P1nM.t. Office 

·.~nnneetad therewith. 

Sir,ned at ---·------- in 1 ~ e County of . ·--r.a 

·-~ii.i. &t!"te of -. ·- ··-w~ -.. ·~-.~this__ ~ of -----·-~·- --· l~i--~ 

( Si,m bere, -------,-----~~ (fir~t nfll'lle in full) 

·:

1

11 ~u.L l/HCl·i . rr 1.:.w COilC !1!1lt:: 

ui 11hich t.ho tollowiu~ 1:.\ (;. epeciflc..e.tion: 

'I1irn i n"P'ont1on 1le~u:rt bed herein m:lY hi"! mrinnf:1otured .r11H \.l'.JCn r,;,. 01• fo~· tl1e 

ua 

!io11P.rn:1n11I, for 1~n·101•r11uMt~il "iHll'!~M1en, wit11011t the pr1ymP.nt to •r.f any roynlty 

·-

@'pp roved for Release by NSA on 09-11-2013 pursuantto E .0. 1352a 

... ;.._ 
! ·-

l .. r 

I 

'\ 

• 

REF ID:A105132 

!1'i1 1nYent1on rela tea to a •:v•t .. tor 1Hrtrtl)" oomuntoat .. 

1ng ~7 .. aaa ot tac111111• tr&111•111ion. 

Ia othor word.•, b7 .. aua ot DJ 111.ventlaD., a ••••&• i:a 

written, tiriatod or 11ot\lr• tora 1• tranam.ltted, u.cler th• oontrol 

S ot & 1o:reen or oamutl•c• •1...,u\. to an.other 1tt.tion. at 111\!oh. th9 

trauai••lon 1• reoelw4 and Nproduo•d. under th• ooatrol ot a chlpU.oate ot a&ld eoreen or oamoutlac• •l•JU11t. Th••• •ore•u or 

oamoutleg• •l••~t.1 .lnt•rru.pt the tra111ud.•eiozi. 1n an 1rroplar 01" 

hetero,eDeOUa aanner Which ~•nd~• illteroeptlo~ ot tba traa.ai•a1oa 

10 b1f unaut.hor1a•4 peraona c.U.tt1oul~. lt not 1.ndeed 1mpo•1lbl•• 

...... apeoltto&ll7. 1t !a an object._ of ay :lnTentlon 'to pro'ride 

a tao11Jlll• trUU1a11alo11 1711t.f!I ba.Ttac, a tranard.ttlq ••11• proYld414 

w!.t.h a. balaao•4 br1d&• oirault.. !h• ..... ,. to 'b• traneaitted oau••• 

WU"1&t.1oa• ill the flaw Of aleotrioJ.t;r 1D. OU branoh Of tliilf bridge 

16 oirouit. J.nt arb1trar111 ••1fiote4 ••J"•a or aontro1 •l•Mli\ oauffa 

ftrlationa in an.other- braooh ot ·ihia-.'bridc• oircuit. ~•• two bnnobea 

are oou.oted tocather IO t.h&t •qual and oppo•ite poten\1•1• are eatab• 

11•h•d aoro11 tho oiroutt ot an ele(ftt1,. lap whose output therefore 

•rl•• 'llhen•••r the 'I01 t&i•• ot the•• • bru.ohe1 are not IU'batantl&1l7 

10 equal. A tru1.m1 tt.•:r la a>UDte4 undor tbo 0011.trol ot the output troa 

1ald lallp. At the plaae to 11hlch 1 t l• de•lrod to 'Wana•i t tho iute111-

leDO•, a reoeptton •an.a 11 located. proYide4 witsb a aeaond. ba1anoe4 

'br14'• ot.rouu:. .A. No•inr ln aomtm!oatloa with aaid traullltt•zt 

oau1•• T&rlatdon• ill tb9 tlow ot •loo\r1o1t7 in one bruoh ot ti. 

II aeoOACl br14&• o:lrout:t. A du.Pllo&t• of Rid •oree11. or ooa.trol •1.-nt 

eau.1•• ftl'1at1cma ln another branob. ot Wa ••oond bridge oiroul-ta. 

th••• two 'branoh•• ot thi• seaond bri~• oircult ar• oomieot•cl toc•thel' 
RE·F ·ID·:A105132 

•o that oqual and Ofpoa1te pote~t1als Are •ata.blished aorosa 

the oirouit• ot an out~~~ electric l~~ ~ho~c outp~t th~~~roro 

••coud bri~e circuit are r.t0t •ubatt\ntiall¥ equal. A l1~htaeus1 ~1~• ol•m~nt# auoh ao a photographio tilm or tho liko. 

ia looat.•d go a• to reoeivd and record the Taria.tlon1 in the 

15 outk1ut o~ an.id. \iUtput el\Jctric la..,._ in tho 1"or1:1 of a. i"&.cai~rJ.lc 

For a. i'urtl ... er C.eacription o! m:1 inv•tit1on rof•ronce 

.. 

end wheruo.t' t.ho no"Veil fuul.llros <Jf ~ 1n~t.:t1on will bt· 111peoif iIn the drawin.t.s. Figures l and 2 &re oircu1t diatrains 

with pnrts si.tOWJl as blo.cka and do:dt;:iatcd with appropriate labB111a 

In tha.t, ombodi:mont or !.a1' b1vention attleoted tron 

&~n.t;. ot.},•Jrs ;or illustration in the druwln.,.a an;! doaoriptio!i 

15 in tbo apeoification~ ay device ia ahown a• compr!ain, an 

elootrlo lac~ l wh!.ch aorv~• as a 1ouroe ot lieht. the light 

bei~ oonoontratad by ~eana or la~s 2 upon the mosea&o sheet 3, 

which 1• to be transUtittod. 'Zhis Meaa•.;e 1J1Ay bo in An opaque: 

£orm, auoh aa on A •hoet ct pa~ar, to retleet tho light tall1ng 

tl1oreon, or in a trau.sparftnt fora, ~uch as a film, to allow the 

light to pan tl1<trethraue,h. In e1thor event,. ths retleoted or 

tr.an.a=!. tt.ed beaa ot li&llt. v~ried in a.cooretinoe '111. th the 'Wh.1 to and 

blaok portions or the Ji:IB•sace, Call• en a l1cht-•ensitive oell 

4, auoh ae ~ vhoto-olcotrio oell. C~ll 4 ia connected aa part 

86 ot a.ri Ali\\>lify.i!JG oircui~. &onorally indicatod by block 6 since 

any "'vll .. liJwwu typo or anipl1ty1nt: circuit aay be employed. 

i aeoouc! eleotr!o lat'-P G tonas & 1eoond SOUI"Ot! ot 

u,ht fomed by .. lena ., into a beac dirootod upon a 1or••n or· 

oontrol ehoet or ele~nt B, which •1 b• any arbitrarll7 ••leated pattem 

.. -ii ·---· ~-

---
80 

56 

'10 

Tl 

80 

86 

REF ID:A105132 

h&Yiug relat1Yel;y lipt &nd dark portion•• auoh aa a writing• 

print, drawing or rAndo11 arrangement ot data. 

B.elatl'Y• 11ation ie pro'rlded between lam;> l and M•••c• 

a and be~W$en lamp 6 And control 9 ao that the b•llltt •-itted 

by each of aaid larapa tall• Ui)on and acane the •••••&• and 

the oontrol, ro•peotively. in a aann•r 1Nll•kQown in the art 

'!'he beaa ot light T&ried by control ale11ent 8 tall• 

on a ••oond li&ht-san•itivo cell connected aa part ot an .... 

plltying oircu1t 1dont1t1ed by the g•neral rererenos oha~&oter 10. 

Tb• out.puts ot the upl1fy1n& oircuit• 5 and 10 &N 

oppoaitel7 conneoted ae th• &l"INI or branohea 11 an.cl 12 ot a 

balanced bridge oireuit ha.Tint a diagonal or oro•• wire 11 

oonneoted to the ter•inala ot a. t.hlrd eleotrio lup 14 •• .Aaglity1ng oirouit1 5 and 10 ha•• •• their output a puleatin& 

direct ourrent ot oon1tant polarity and are oonneoted 10 that 

equal and oppo•ite poten~1ala are ••t&bliahed aoroaa la.wip 14 

by the •ignal1 tran1mittod under the oontrol or •11age S and 

oontrol 8. Lanp 1-t ia aenli thed by a looal battery 15 regulated 

by .e.dju1tabl• redator 16. 

Lena l'I oonoeutrat•• th• light troa lup 14 into a 

. beam d11'9oted upon a third 11ght-aena1t1Te oell 18 toratng part 

of a 01rou1t inoluding e Utpl1t:f.er 19. a tran•aitter 20. and 

an output elea.ent. suoh ae an antenna 21. as aholm, or the 

ten&1nftl1 ot & wire tranaaiaaion ay•tea. 

At the looa:tion or plaoe at wh1oh th• .moaaage la to 

be reoe1Yed. thore ia !JN'Yi.ded a receiTl~ m~mber, auoh aa 

antenna 22. aa ab.own. or the oppo•ite t,enain1J.la ot the wire 

trana•1•sion •1•tea. A receiwr 2S with an amplitier haa it• 

., output oonneoted to a la11p 24 which 1• energised by & local 

batter;r !&. Lena 26 oonoentratea the lit.ht t'l'OJI l••P 21 upon 
REF ID:A105132 

10 11ght-•ena1ti'f'• oell ."t/ torain& part ot a. oiroutt inoluding a 

third aiapl1tier !7. 

An eleotrio lup 28 emi ta li1ht whioh ta boMl8d. by 

lena 29 onto a aoraen er control •leri.ent SO wtdoh ia a duplioate 

05 ot oontrol a. Ralat!T• movement ia proTidsd bet119en lamp 28 

and duplicate control 10 10 that •xaot •ynohl"ontam 1a maintained 

bet.oen tha 1oanning ot oontrola 8 and so. !he light troa •ouroe 

28. retl•otod or tranaM1tted bJ duplicate oontrol so. 1• paa•ed 

to li&ht-•enaitiva oell 31 torm1ng a part or a oiroult which 

100 alao 1nolude1 an amplit1•r 52. the output cirouits SS and s• 

or amplltier olrcuit1 27 and 32 are connected •• ar~a or branoh•• 

ot a aeoond balanoed brid&• o1rouit havin& a diagonal or orossw1r• SI Whioh oonn•ct1 to the tenldnala et a third output eleotr1o 

lamp 58 tmergised by local battery 17 under th• oontrol er ad106 ju1tablo reaistor 18. !ho light outvut ot l&llfl 16 11 oolleoted 

bJ len1 39 and tall a in &. beaa on recorder 40 Whioh •7 be any 

llght-••ns1t1ve deT10• auoh ae a photographio plat& or tila. 

Relat1'H meYement ia uint&ined hotwoen. lamp 38 and i""eoorder 40 

in exact 1ynohroni••with the relative movement betWG~n 1-.p.1 

110 and me•••'e I ao that recorder 40 reproduoa1 1dent1oally thlt 

aaa1age ~ as Y&ried b7 oontrola 8 and so. 

The operation. ot rq devioe 1• a1 tollon1 Ke11age 8 

is aoanned. by the boaa ot light f'roa lamp l t.nd produoo• 'ft.riation1 

in thia b•a!ll d•p•nding upon whether or not the portion ot th• 

• 

116 uasa,e ltbioh lntero•pta the b•a 1• black o:r- white. Th••• 

T&rlation• are tranaaitted by oell ' and a•plitiod in o1rouit a. 

Oontrol a '11lri•• the bolll\ of light troa •ouroe f and atteota 

oell 9 and c1rou1t 10 in the aair.e "Waf• Since th• output volt•l•• 

ot olrouita & and 10 are balanced againat eaoh other thor• 1• no 

180 ohan.-:;• in the output or lamp 14 unl•H there 11 a dltter•nce bemtn tho1e outrut ..-olta,et in th• ani or bruoh olrouita ll and 

f ! 

-
REF ID:A105132 

12 In other word• or the tour po••ible onndition• of ~•a••&• 

3 &nd aontrol u +wo oond1t1on1 oau•• a T&riation in the output 

ot lamp 14 and wo aonditiona oau•e no vr.riation lll 'the ou1iput 

125 ot lamp l' fhe aond.it1on1 w'1ioh oau1e a Yar1ation ar9 when 

~e s ot or ~~s••~• 3 on wh1oh the be&• of libh~ all1 is ~lack 

or white and the 1imultaneou1ly expoa•d •pot ot o ntrol o i• 

the reTerae ?he oondit1ona lM.ioh cau1e no variation are when 

the simultaneously expo1e~ 1pota of na11ab• 3 and oontrol a ~r• 

lSO or the 1ame ~ue •he T&riationa n tne in~enaity 01 the light 

emitted by lamp 14 au1e ulaea or 01oillation1 in the oircult 

containin£ amplifier 19 and tran1m1tter 20 rh••• oulae• or 

oaoillatlone are sent to recei"Yer 2S where thev cause oorre1-

pond1ng Y&r1at1on1 in the light ••1tted by out u~ lamp 4 and 

111 therefore in the output ot the circuit oon~aining the third 

amplitier 27 Simultaneously with ~h• 1oann1n, ot con~rol ~ 

duplio&te aontrol 30 cau1ea variations or the beam ot light 

from aource 28 w~ioh variation• aatuate oell 31 and appear in 

the output circuit 34 ot the oirouit cun~inint; the our~h 

140 amplitier 32 .s...anp 16 ii mounted aoron •he outpuli cirouita 

SI and St or the oirouit• cont&ininb third L~plitier 47 a~d 

•ourth amplitier 3 re•peotiYely 3eoa~•• the voltages or 

output oirouit• 3S and ~' are equal and opμo1ed the light 

emitted by lop 36 onl V varieo when WO of he four "')Ol81ble 

14-6 oondltion1 •Kist That ie t.o aa.y when here is preaent n 

output oircui-c 3S a iJUl•• oorre1ponding t.o either • black or a 

wlli • 1pot in the original :neaaage S and there ii llmul taneoualy 

pr .. ent 1n output oirc1.11t S4 & t'ul1e correaponding to a apot ot 

the oppo11te hue n the duplioate control ~O a 'f&riation in the 

110 light output of lamp 36 oooura ConTerael7 when the almultaneoua 

impulaea pr••ent in ~h• output oirouits 33 and 34 oarreapond to 

spot1 ol like .nue in ••••g• ! and dunliau.e cont.rel 30 no 
~F I~:A105132 

I 

~&~i&tion happen• 111 th• output ot output l&ap se. !h••e 

"l&riationa or the output ot tho light trom lamp 88 ••n•1t1s• 

165 the ph4ato,raph1o ele~ent .ti>. spot b7 spot aa the ele~ant 11 

•canned, and thu1 roproduoe the original aiessa&• s. 

, .. 

I 

• 

!K 

----
. 

i 

I 

' 

REF ID:A105132 

We do not. intend. to be limited aa•• a1 the aoop• ot 

th• attaoh•d 01a1 .. rlAY require. 

•• ola.111."1 

1. Ileana tor aeoretly tran1m1tt1nc p1otor1&l intonaa.tion. 

a piotorial mea••G• aa a aeriea ot •lectrio i•pulaea ot varyin& 

intensity, a aoreon haTing "V&rying portion•. a •eoond aoanner 

arraJlb•d to 1can and reproduoe the "V&ri&tion1 or aa1d aorean aa 

a aeoond aerie• ot eleotrio iapul••• ot v&ryiJll intemrity, an 

eleotric light conneoted aoroaa. the output oirouit• ot aaid 

acannars ao that its outrut variea in intonaity wheu the potontiala 

aoroaa aaid output o1rouita are not •qual, a photo-elaotrio 

10 oel.l aounted so ... to 'far') in reapon•• to the output of ae.id 

light, a tra:n.sa1tt•r oomi.ooted to •Jilt signal.a in aooordance 

with the T&riationa at 1aid photo-•leotrio oell, a T•oeiYer 

arranged to reoeive the •i&nal• ellitted by •&id tran•ldtt•r and 

haying an out~ut potontial Tarying in aocord&noe with 1aid a!gnala. 

16 a aeoond •or••n duplicating •aid fir1t m.ent1oned 1oreen. a 

1eoond reoe1T•r ha~ing an.output potent1al.Tary1n& under the oontrol 

ot •aid •eoond aoreen, another eleotrio light oonnaotod aoro1• 

the output oircuita ot eaid reoe1Y•r• ao that it• output var!•• 

in intenaity when tho potentials aorosa aaid output oirouita &re 

20 not aqual. and a light-1en•itiT• el•Dl8nt JIO\Ulted •o aa to be 

·•canned &nd to record the variation• in 1nten11ty ot •&14 

other light and to thoroby receive the me1sa,e. 

2. Meana tor seorotly tranaJllittint. p1otor1al intormation, 

aaid mean• oompriaing, a soannor arr~ed to acan and reproduoe 

a piotorial ..... ,. &a a ••r1ea ot •leotrio 1.apul••• o~ Yar,yin& 

intensity. a •oreen ha'Yin,; T&rying portions, a aeoond scanner 

5 arranged to acan and reproduce the nriation1 ot aaid. •oreen 

J { 

- / 

. -- ··------------~---------------...._ _____ ...__...._ ______ _,_...:::.ii 
·' 

REF ID:A105132 

as a 1econd ••ri•• ot eleotrio 1.pula•a of varying inten1it1. 

an eleutr1o light oo?ll1eat.d aoro•• the output oirou1t• ot ••14 

•oannere ao that it• output T&a:"i•• in inten•1t;y whc the po ... 

tentiala aoroaa aa1d output oircuits •r• not oqual.11 • photo ... 

10 •l•otrio cell mounted ao •• to ftl'.Y il:a. re1pon•• to the output 

or aaid l11ht. & tranam1tter oonneotsd to •lilit aignala in aooo~d· 

anoe •ith the va.r1a.t1ona or said photo-eleotrio cell .. o. receiver 

arran&•d to roceive tho a1gn&la 9?11.~ted by aaid tr&11.1mitter.J 

a second eleotrio li&ht connected to •aid r•co1Ter ao th&t it• 

llS output varioa 1n intensity in a.ccordtlnco with the •i6NAla r•-

ceivod by a11.id reoeinr,. an at1pli.f'ier oirou1t inoludin& .. 

1eaond photo"electric oell 110unted so as to vary in reapona• to 

th• output potential ve.r;1ni in aooord~noo •1th aaid aignala, 

& saaond aoreen d~plio&t1ng s•1d tirat mentionod •ore&n. a 

•ooond receiver having au output. potential va.r,;ting unde:r the 

oontrol or aa1d second soreon, a third elaotrio light connected 

aoros& th• output oircuita or aa1d reooiTer• ao that it• output 

'flLriea in 1nt•na1ty when the potentials aoroa1 ea1d output oircutta 

ar• not tqulil, and a l1&ht-sensit1vo eleaoxat IJOUntl)d so •• to 

25 reoord the irai-ia.t1on1 in intrmd t;r ot •*-id third light and to 

thereby reoeive the meaaage. 

1. .A tranaa1tti~ and reoei•1nc a71tea. tor aeoretly 

oommunieatin& M1aace11 in pictured tora 1n whioll th&re 1• proTid•d~ a r1rat •l•otr1o oirouit oonatruoted •o &• to ..S.t a 

direot OUM"ent YOltage whioh varl•• in reapona• to the nrln.tiotia 

in light tran•lli••ion ot a ah••t on which the ..... ,. 1•1 a 

control •l•e:nt ha•i:ng portion• ot varying llght tran1mtt1JJ& 

oh&raoteriatioa, a eeoond. oleotrio o1rcu1t oonatruoted so aa to 

emit a 41reot ourrent Toltage whiah v~riea in r•apon•• to the 

uria.tlons 1n light tr1nami1aion or 1a1d oontrol •l=•nt, a. 

10 tran1aitter aountod under the oontrol ot a&id circuit• ao 

IP 

- ... -~~·---------------------------------=--'.-
,--· 

• --~-=--~.--.-------- -· -··-- ·-

that the trana~ltter only emits a •ignal when the out~ut 

Yolto.c• ot ono ot •aid oirouit• dittere tro~ th&t ot the othor, 

& rooo1"Ytr tunod to ro•poud to ai,nals •lld.tted by said transaitter- And to provido t..n output TU•ylng with said •~in..is_. • 

15 aeoond control ele~ent aubata.ntially identical to th~ fir•t 

ll:IOlltionod oontrol element, a third <totrio oirouit oonatruotod 

10 1us to tttd. t a diroot current vol t.a&o which var-ies in reaponae 

to the v•riationn in light tra.namiaaion ot •aid s•oond oontrol 

element, a light Gld.tter mounted under th~ control or •aid 

2(), receiver and or s•id third •leotria oirouit and &:rr&l1'•d ao 

the.t tho lit.ht ~1tt~d thftroby nriea onl1 -.hen the voltag• 

output C3r st.id ree&i vor diffor1 !'tom that of ... id third oirouit" 

•nd A r•oord1ng deTioo located ao aa to raoord the ~ri~tions 

et t1;.~ light •mittad by aa.id eiaitter and thus ta rept'Oduca the 

·- ---- ···--·--- . ·-------

·---==-

It 
REF ID:A105132 

*• In a aeoret OOl!ll!Ult1oation ayatem byaeana of tao•i•il• 

trc1'1111asion,, • balanced b:r1d&• oiroui t ba:dng an output elemont 

aupplyl~ att output 'ftrying 1n re1pon1• to tho output ot an 

ampl1ty!ng oirou.1 t oontroll•d by tho •••••1• to b• 1ent and to 

the output or a. ••cdncl &lllplity1:ng oireuit ooxitrollod. by a 

aoreen,, ~· out.put• ot said u.plif'Jiq oirou!.ta beln& be.lanced. 

&ga1nat e&ch oth•~ ao that there 11 no output rroa 11&i4 brid&• 

oirouit •xc•!)t when th•r• !a a difterenoe betwen the output• 

or 1ai4 ampl1ty1ng oirou1ts,, & trana•1tter having 41%1 output 

10 element •uppl71ng an output varying in reaponaa to tho output 

tro:a aaid bridge oiroutt, a ••oond balanced brid1• circuit 

haVin' a.ti out.gut eluont. supply~ an output va.:eyin& in rtt1pona• 

to tb• output ot a third aapl1f'ying oirou1t oontroll•d by a 

reoai ver oontroll•d in turn by the receipt ot the output trom. 

16 1a1d tranaJBitter and to tho output ot a tourth aaplityin& 

oiroui t oontrolled b,y a duplicate o~ aa!d aor•en, the output• 

or a&id third and tourth upli!"ying cd.roui ta, being balanced 

againat each other ao that thore ls no output trom. said 1ooond 

bridge oirouit exoopt whon there ia & d1ttereno• betlreen th• 

10 outputa ot 11.id third and fourth uapl1.ty1ng oircuita,, and a 

recorder reaponain to the output ot ea.id •econd bridge o:trouit 

to turniab & raoa11111• or •&id m.e•••&•· 

L! . 

- . -· . ·- -· .. ·- -- .. . ·-·- ~---·. -· ------··· -·--------------------=--~-~::...__~, ..... ;a;.·-· 
REF ID:A105132 

&. A •Y•tem ror aeo,..t oommun1o&tion co111pr1otng, a •~uroe 

-~~anged to •l!.l!t a b~am ot 11'1:it. a u.e-aa~ge loa~t•d •o &a to 

vary aaid bealil. or light from ••id aouroo. A light-aenaitiYe 

oell arr8I14;ed to receive aaid beaat of light troa ••id 1ou~u• 

as •ried by •a.id ••a~e, an azaplity:tng circuit inoluding 

•aid ~ll, a. aeoond souroe arr&ngod to •Slit a be&lll or light~ 

a •o~oen. looated so &a to n.ry a&id: boa.-o. ot li&ht .f'rotl ae.id 

aeoond aou?"O&t a •eoond light-aenaitive oell arrant;od to r•-

oeiv• said beam or 11ght tro. ••id ••oond •ouro& as varied by 

l.O •11.id IG.r••n, a. 1eaond a.raplify1ng oircui t inoludin& •ilid aeoond 

coll. • lamp oonneoted &oro•a th• output• or ea.id aapli.tying 

oiroutta ao that the li£ht •aaittsd thor•by Tariea wh•n there 

i• A dit".rerenc• between the outputs of •"'id .ans..-..11ry111, oirouita,. 

a third light-sensitive cell &rr&l'.lged to r00$1wt light rrom 

15 ea.id l&.11p and to oaUI$ n.ria..tion1 in oonsonanco with the va.ri•tion1 

in said light. L tr&namitter conneoted in oi~ouit under the 

oontrol of aaid third Qell ao as to vary ite tranam1a1ion in 

oon•onanoa with tha v.a.riations •ffeoted by aaid thi~d coll. a 

r•oeivo~ !n ooiw:aunioa.tion with a&ld tranaai.ttera • aecond l-.Mp 

20 conneotod t~ vary in consona.nc& with the 'Q.t"ia.tiona 1n output 

or aaid reoei•er# • fourth l1ght·1enaitlT$ oell &rr~ed to 

reoeiTe liiht trua •aid aeoond l~mp. a thi.rd u.pl1f;r1n& oirou1t 

inoludin, aaid tourtb cell, • third aouroe a!"r.n&ed to tJl41t 

a. 'boa.a or liibt, a dupl1oa.t6 scre•n loba.ted 10 aa to va.cy aaid 

85 beam. or light from aa1d third aouroe aa "1lri•d by aaid duplioat. 

aoreed. a toul"th uplify1n& oiroui t lnoludinfi ea.id fourth oell. 

a third laup ooM&oted a.Oro•• tho outi;ut• ot a&id t:11rd and 

fourth axapl1tying airoui~a ao that the ligh~ alllitted thereby 

V&ri•• when tbet'• ia a. d1f't•ronc& betv.ean the out)lut• ot ••ld 

third and t'oUl"tll amplifying oircuite,, a.nd a l1tht--1•n•1tiv• 

doTice arr&Xl£e4 to reoei•• li1ht from 1aid third la=ip and to 

~oord th& Ttr.rt.at1ona ot aa1d Hr:,ht in tile tom. ot the or1t1nal 
e REF ID:A105132. 

IN TESTIMONY WHEREOF they affix __ t_h_e_1_r __ si~ature.!__ 

(Sign here; first name in full.) 

OATH 

,BB 

William F. Friedman and J. o. lfauborgne 

the above-named petitioner_8 __ , being duly sworn, depose __ and say_ that th~y are 

citizen 1 the United Btatea of .America 

ar..d l'esident B of 3932 Jilli tacy Rd.·, Washington, D., o. and No. l Alaton Court. Red Bame. 

Hew Jer191 • ...... .. .. that th•y verily believe themselves to be the orig~n~l, first, and ~j_o_i_n_t __ _ 

inYLntui·_• __ of the improvement_ in __ e_y_•_t_e_m_r_o_r_F"'"_c_ip_· h_e_r_i_n_g __ Fa_c_•_i_rni_l_• _______ _ 

d6lscribed and claimed in the annexed specification; that they do not know and do 

not believe that the same was ever known or used before their invention or discovery ----- thereof or patented or described in any printed publication in any country before their 

invention or discovery thereof, or more than one year prior to this application, or in 

public use or on sale in the United States for more than one year prior to this 

application; that said invention has not been patented in any country foreign to the 

United States on an application filed by them or ----- legal representatives ----

their 

or assigns more than twelve months prior to this application; and that no application 

for patent or said improvement has been filed by them or their representatives ----- -------

or assigns in any country foreign to the United States, ~: 

SWORN ~o and subscribed before me this 

(Seal here, to be.impressed 

. in paper.) 

(Sign here, first name in full) 

-~---day of----------' 194& 

Notary Public 

fl-3952,AO 
REF ID~~ .. A105Jli2 

L I C E N 5 E . 'W' 

WHEREAS, n,, Will:lu r. Friedman and J. o. JlaubQr&nf. are aploye•• ot tu 

Oo••rnmont ot the t1n1t•d State• or Alltlr1oa11 an4 

WHERE.AS, in pursuance 9f said employment the undersigne~ invented certain imprevements in Syatem tor En.ohiphering I'aasiDt.11• 

for which the undere~ne!ils about to make application for Letters Patent of the 

United States; and 

our WHEREAS, the nature of• employment, and the conditions and circumstances 

under which said invention was made, are such as to justly and lawfully entitle 

the Government of the United States of .America to have a non-exclu~ive license 

and right to make and use said invention, together with any and all improvements 

therein and inventions relating thereto that the undersigne~ ma.de er may herea.ft er make while employed and engaged by the United States 0.over:Rment; 

NOW, THEREFORE, in consideration of the premises the undersigned daas hereby give and grant ~to the Government of tho United States of .Ame.rica a nonexclusive license to melca, to have made, to use and/or to soll, said invention 

as described in the specificatLfn oxecuted by tho undorsignod on •Ytp date 

t 

~~--~--~--he--rflW~-t-t_h~------~------~• J&id_non-exclusive lice~se to extend 

to axry and all Letters Patent which may be gra.ntcd for said invention, (inoluding all divisions, reissues, continua.tions, mn~ extonsiona thereof) together 

with any and a.11 improvements thereon and inventions relating thereto made by the · 

undersigned whilc.empl~yed or engaged by the United States Government, or fer 

which the undersigned may hereafter make applicatitn for Letters Patent whi~e employed or eng1J8od by the United States Governmont, reservi:ng to the undersigned 

in each caec tho unrestricted possession of all other patent rights not hereby 

or otherwise liccns~d to the &ovor:nment of the United States of Amer1ca. ~aid 

lieonse hereby granted or fti;roed to be granted shall extend thrt'IJ8hout the Unit~ 

od States, its torr1torios and depe~d.enciea. and all foreign countries and shall 

continuo in force for the full term for which said Letters Patent may bo granted. 

SIGNED at·---------------• State of __________ .,. 

thi ____________ day of _______________ , 19..iL 

1" , .. 

Witnesses: 

... 

•. 

,.',•• \,I 

Signed: 

...... ,,,,.,. 

.. >=.. '. ·. o.sc, .. ~, 

'~· 
' 

WHEREAS, Wa , Will!aa 'I'. :rrie&nan and J, o. Jfaul>orcne _ of •a12 Kil itary load, lfy)lington, l>,O., ant lo. 1 .il1tQJL Court, .lad Wk, ~A,~~ , have invented certain improvements in .. .,9k .... ¥ --- - ~f-----:-".~-,-:o-----il&i:~~R~~ ... li-if~llPl"--ilia.-;01HpA~.W.FiW1&(1illi"-.tiilftJWf01~iYM~i1~•1t--------~------------------, or which tho una'brhgneo. on e-q w :a l:'·:b. 

executed an application for LetterS'fsatent o!11t{e1inited States; and 

-- ..... WHEREAS, the invention-Was made while the undersigned~ in the employ 

of the War Department, and p~rtains to a device useful in the National Defense, and 

WHEREAS, The Government of the United States is desirous of acquiring 

the entire right, title, and interest in and to the said invention and in 

and to any patents that m~y·is~ue thereon. 

NOW, THEREFORE, in consideration of the premises and one dollar (~l.00), 

the receipt of which is hereby acknowledged, the undersigned have sold, as-, 

signed, and transferred, and by these presents do hereby sell, assign and 

transfer unto the Government of the United States of America, as.represented 

by tho Secretary of War, the entire right, title and interest, throughout 

the United States of America, and the territories and dependencies thereof, 

and not elsewhere, in and to tho said invention and to the invention as described in the specification executed by the undersigned on ~ da--.~ 

~ ~ , preparatory to obtaining etters Patent in the11!~~ Statos therefor, and to all Letters Patent issuing thereon and any continuations, divisions, renew-a.ls, and reissues or extensions 

of such Letters Patent; the said entire right, title and interest as well as 

the control of the prosec~tion of the application and all continAations, reissues and divisions thereof to be held by the r.overnment of the United 

States of America (as represented by tho Secretary of War) and all Letters 

Patent including any divisions, reissues, renewals or extonsions thereof 

as there are or that may be granted, to uo held bf th..: Govormnent as fully 

and entirely as tho sruno would have been held by mo had this assig:n..11e:..'Ilt and 

sale not been :Illa.do. Tho undersigned horuby givel#the Govornmont of the 

United States of America tho non-exclusive right to make, use, or sell the 

invention for governmental purposes in all foreign countrius. 

Provided, however, that upon any subsequent notice of allowance of said 

application or of any renewals, substitutions, divisions, continuations, or 

continuati'ons-in-part being given by the Commissioner of Patents, the entire 

right, title, and interest in and to said invention and said application or 

any renewals, substitutions, divisions, continuations, or oontinuations-inpnrt, -find such pa.tents as may be issued thereon, will thereupon rovort to 

thn1•Jn1 subject to an irrevocable, non-exclusive, and royalty-froe right and license 

remaining vested in tho United States of America as r~prosentud by the 

Secretary of War, to muko, hnve made, to use, and to sell the subject mutter 

of said invention for governmental purposes only, to tho full ond of the 

term or terms for which any ~otters Patent, divisions, reissues, rencwnls, 

oxt· .. msions, continuations or continuations-in-pa.rt nro or may be granted. 

· Witness 

Before ma, a notnry public in ~.nd for the 

npp1')a.r0d tho a.bov~-n!l.med ---------------

-.--------------__,..._,,_.,~--..----...---------, porsonally known to mo, who in my presence executed the foregoing assignment and ncknowlodgdd that his 

execution thorcof was his free act and deed. 

(Seal) Not'lry Public 

lt.J •• 

. 
' ). ~ ~ I i 141 

~' ~ I 

~ I 

~ 

~ ' 

REF ID:AlOSlft 

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