._ 

·:·. 

SU!JOOft Patent A:pp,l!~·t..ton Qt ~n encl.~. 00 4781868· . . 

.. 1'0• 

1. Inctae4 heret!lth, b atpU.ea•,. lee peopoad --~to 

\bla Abject e:ppllcatt~ . . · · .. · ... · . 

2.. ·rbt> Em&ndment u &le 1n the· Petoat om.o. 16 -~ 1946. 

FCR 'l'lm C!flEF_. .Ami! etcmn:Tr AGENO!t 

Declas,c;ified by NS°A/C5S 

Deputy ASsociate Director for Poli-cy and Records . 

. 0~13~t3o .by'&LF· / .· : 

~- Declassified and approved_ for release by NSA on 12-04-2014 pursuantto E .0. 1352a 

·~AL va. • .· 
REF ID:A114610 

Ilf THI 

UNITED STAibs PATEBT OFFICE 

IH Rlh &pplloaUon or * WIT.J..IAM F. FP.IEmlAN and 

JOSEPH O. MAtmcltGS * 

Serial .... * 478,868 

* Filed 

12 Mareb 1943 * 

For * sYSTF.M Fat Ell.}IPBDIJll 

FAOSIMI1£ * 

* * * * * * * * ~ * * 

1'01 The Hononble ComiaadJmer ot Paten• 

Waahington, D. c. 

Sirt 

Thia a in reeponse to Patent Ottioe action ot 16 Ootober 1943 

in the above 1.dentitied applioat4.on. 

'Pleue wad u 1nrHoatecl below. 

IH THE CUDS& 

Clas.a 4, line 6 •Baton "tbe" imen - MW tor '*»lancing - • 

line 6 - Canoel "being belanoed". 

line 16- Betare "the" 1naert • •am for bel•Minl • • 

U.. 17• Ca.noel ", being balanced"• 

Plaae add the tollow1ng o~. 

@'pp roved for Release by NSA on 09-11-2013 pursuantto E .0. 1352a 
REF ID:A114610 

ll. In a tacsimile privacy a~ratua, a first device tor 

scanning a subject, a. lamp associated with saio device the intensity of its illumination being varied responsive to the output or 

said device, a aeoOtld devi.Cle for scanning a subject concurrentJ.y 

with the first device the output of said second device acting on 

said lamp to vaey the intensity of' illumir& t1on thereof' 1 and 

light aenaitive mew for ~ a signal responsive to the 

illumination or said laap. 

12. In a f'aosimlle privacy apparatus, a ti.rat device tar 

scanning a subject, a lamp asaooi&ted with said device the intensity of its illumimt.1.an being 'ftried responsive to the output o£ 

said device, a aeoond device for eoannq a subject oonourrent]¥ 

with the tiret device the output or said seocnl device acting on 

said lamp t.o var,- the inte.naity or illumimtion thereof, light 

sensitiw means tor providing a s1gnal responsive to the illumination ot S&1d lamp, another lamp and means tor varying the intensity 

of' its illminati.on in response to the output of said light sensitive 11-.ns, another light sensitive means responsiw to said other 

laap, means tor e:rtectively subtracting from the output of said 

other light sensitive •ans a signal. equivalent to the output or 

said ~ device, am means tor graphioally recording the reeult. 

13. The method ot obta~idng a private taosimile a1gnal. which 

1.ncludes ft171ng a t:ranslating device in response to a signal troll 

the subject to be tranaaitted and concurrently V&17ing the translating device by another signal. 
REF ID:A114610 

Claim 4 bu been ..med to apaoif)' mw tor 'balancing the 

OU'\puts or the a.mpllt)ing o:lraa1te. The old.a u 8MDd8d 1a be--

llft9Cl "°~'\he Ex:a"LiMr's reJeotion tor iadafin1t.. .... 

Hew Claiaa 11, 12, and l3 are d1Ncrtlecl "° appara-. ud a 

•tbod tor obtaintns p.rlft01 ln taoebd.le .... soaUona through 

a oonoept bel.in94 nes 'td.'Ul the appllouta. ot tbe nteranoe• 

oi"8d, onl7 l'ie:Ne, l,312,S74, embodiee the addition or s.ipala, 

and ~ "a&liUon" or thie patmt oonaida at blocldng out one 

of the atpals. ApplSoante ettectiftl.1' add and subtnot b7...., 

ot l:ridp oirom:t. 11-13, and appJ..y the true am ar difference 

OUl'Nllt to t.ranalaUng clavioe 14. 

RupeottullT, 

WILLWf 'F. PRIEI*AB 6&Dd 

JOSEPH o. lllUBORGIE, Applloante