REF ID:A363282 

D1 THE UNITED STATES PATENT OFFICE 

In re Application of 

William F. Friedman 

Serial Ho. 549,o86 

Filed: August 11, 1944 

For: ELECTRICAL SYSTEM 

The Honorable Commissioner of Patents 

Washington 25, D. C. 

Sir: 

Division 44 

This is in response to the final rejection of 13 April 1956. Please amend the 

case as follows: 

IN THE CLA.DfS: 

Cancel claims 2, 5 through 7, 10 and 11. 

Add the following claims: 

25. In a cryptograph including a source of current, a plurality of indicating 

devices, a normally open switch for each said indicating device, a plurality of 

permutable electric paths interconnecting said indicating devices in pairs, and 

means for permuting said paths, tw~ closable by closing each said switch, 

one including said source of current, the closed said switch, and the said indicating 

device thereof, and the other including said source of current, the closed said 

switch, ~he aaid:-ind:tcati:ng-dev-!ee-1>here~A one of said permutable paths, and the 

interconnrcted said indicating device. 

~~tvt:~ }'h~hr Qp )i / [9 ~r~v ~ 't") 

Declassified and approved for release by NSA on 07-23-2014 pursuantto E.O. 1352a 
REF ID:A36328. 

~ "# j cryptograph according to claim 25, :further characterized by a manually 

operable switch, and a :further switch having two operable positions interposed 

in a selected one of said other circuits alternatively to connect in its first 

position the permutable path of said selected circuit to said normally open 

switch ~ sel-eC!"ced-.=ci-rcu1:t~ and in its second position to connect said 

permutable path of said selected circuit to said manually operable switch, 

means • operable by said permuting means for causing said :further switch to 

toa..V( /.:Jt'cP'k ~ ·+P :( s~t' · 

assume its Mfte? epera&le position ther; 'to' Qji' idd lae'l; mes;U,oaecl otber 

source of current, said manually. operable switch, said further switch, .c said 

_ Af pl#).,,/ .ee&$. .. I U-.c~ permutable pa~y, uand the ~indicating devicevc~aatl '<kl 1~ete.. 

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REF ID:A363282 

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I 26 In a cryptograph according to claim 25, further characterized by a ~ually 

operable switch, and/further a switch having two operable ositionse ~~ A ..la._ ~d;~ p'V1...e.. d ~~t ~ ~ ~ ,,.(.-., r.:~ in one position to Ciose a said other circuit at a point between a redete~ 

.. }z.~·?~- ~c/'f />tt:lA-eL h~d~ ~. ;/;--a~~ ?$aid -indicating device and the Jr~ permutabl~ path thereof', L!Jans c)perable by .) 

tJ h:_-tA-~ d, rl /.71fft,<. &'~~) ~ /f.AA- ~ ~ c::.~.(/1fe-~ said permuting me~s for causing said further switch to assume '8 Other operable 

h- /.);!A..~t...~~ ~ ~c--LI~~ position thereby to Lopen 4aid:' 18.st mentioned other circuit at said point and 

to close an authenticator circuit including said source of current, said :manually 

\ft } operable switch, said further switch, a said permutable path, and the said 

,\ / indiCKting device ccmiected tllereto 

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REF ID:A363282 

In a cryptograph, a source of current, a plurality of cryptographic rotors, 

•tationary contacts connected in pairs through said rotors, an indicator 

conaected to ~ch or said stationary contacts ~~~~~~~ switch for each said in icator, l 

and a pluraiity of circuits each closJable by a said switch each including 

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aa14 source of curren:,'a said stationary contact1 a path 

~ 

thr~ said rotors, 

the connected stationary contact, and the connectedjf ndicator, means for 

stepping said rotors, and a further switch operable by said rotor stepping 

means and, when operated, by-passing a selected indicator and a said switc~,,· · 

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