REF ID:A65428 

2. ~h Drm Bar ha• a tixed number 

of LDI•• Dram Bare 1 through 9 ban 6 Luga each (3 on each aide of the partiallJ' 

separated Drull)J Drum Bara 10 through 18 haft 4 Laga eaah ( 2 on each aide of 

the part:lall.7 separated Drwa) J and Drum Bara 19 t~ugh 27 haft 2 Luga each ( 1 OD 

each aide of the part:lall.J' separated Drm). PrOYieiom tor neutralising the ettect 

ot fW8r'J' Luc :la made 'bJ' •ero poa1t1ona on tae Drum Bara. 1or uample 1 

Lett aide ot Drum R:lght aide ot Drum 

1-23-45-6 

Aa the DrUll :la turned 'b7 the Dr:lv:lag mechaD:la, the I,ip are engaged 'b7 the ettect:lve 

Guide Arma, shitting the Drum Bara to the lett (ettectiTe) poait:loa. The Drat" Bara 

are reset to the right (:laettective) position 'b7 the Drum Bar Retractor. The number 

ot ettective Lqa thu depmda upon the number of Luga which ea1ap one or more 

ettect:lve Cu14a .lrlle. 

D. P.l!:lillt Wheel and Reproduc:lal D:laa are 

located on a comao11 shaft on the left aide of the machine and are operated meahudcaJ!l1" 

throqh the •d:lua of the Pr:lat lhael :lntermed:late par dur:lag the operation ot the 

Dram. 

1.. The Print lheel is adjacent to ad 3•t 

ina1de the Reprodua:lag Dua and. bear• an alphabet :ln normal order and 1n the •- 4ireat:lon. aa that on the llepslac!ucinl Diec but offset a certain number ot plaaee. 

Printing ooaura attar the second complete rwol.ution ot the Dra. (All lq Wheel• 

have stepped twice dur:lag th:la operation). 

2. The Rep:r'Od:aciq D:lac beara the alpmbet 

:ln normal order. .A.t the end ot eadh operat:lon ( 2 G011Plete rnolutiona ot the Draa 

and 2 atepa ot all the 12 ~-llheela) 1 the letter ria:lble on the Reprodua:lag D:laa 

and cloaeat to the Indicating Inclez :la the letter wh:lch ha.a been pr:lated. 

B. The lna:lpher/J>eoipher Knob coatrola the 

spe.cing ot the letters OD the tape l.Dd the print:lag ot the letter •z•. 1hea •t at 

•c•, the tape ia adTanaed an extra apace after each 5 letter•, thus apac:lal the tat 

into 5 letter groupa. When eno:lpharing, the letter •zw 1e used for apacea 'between tla 

worda ot pla:la text. lb.ea aet at "J>ll, the print:lag on the tape la spaced normal~, 

anit the letter •z• will not print. 'll'Ol"da llUOh aa ZBRI) and BD1DIZV0118 w1l.l. appear 

u BRO and mnB V01JS and mat be aompleted 'b7 :lnapect!on. 

r. A l871x>ard :la located at the front ot the 

machine and the tat ia tJP8d d1rect]7 into the mach:lae. Dru.II and lay Wlulela are 

operated 'b)' a •rmal~ operated Drin Arm oD the aide. Operating apeed :la 11m1ted 

due to the meohan:lcal l:lmitat:loraa. A deacr:lptima of the armer in which the Prilrl& 

Wheel :la Ii"! :lta :l.nit:lal diaplecmeDt troa the Ketboard la ba;yo.ad the acope ot 

thl• paper. t :le eutt1c1ent to state that it :la simple and reliable and an 

adaptation of standard addiq1!8ch1ne technique dneloped bi' the llemiqton Rand 

COllPlllJ1' for the Goftmment. -,; accomplillhea bJ' depreaa!on ot a Kq, what :la 

accomplished in the original Bagel:ln 9acbine bJ' turn:lal the Print lheel until the 

desired letter on the Reproduc:lag D:laa appears opposite the acribed reference line 

OD the MCh:lne. 

R. Motor Drive Attaclmen 

I. Coftr 

j. D! LlS 'l' AND lBDICA.TOll .SYSTEl1· • ' - -

.l. 187 List proride tor the Luc poaltiona, 

P:la Sett:lnge, and a 30 letter checi1 u a 11181P1• ot checking the kq aett:lag and 

operation of the •chine. The sequence ot 30 letter• given :la the encipherment of 

the letter •A• on the 1st through 30th atepe :lnaluaive troa •ero position, ua1zta' 

Pin Settings an4 tq Poa:lliona given 1ll the X.,. Liat, with the initial lq llheel 

al11D119nt ot •111111 &A•111•. ----.. -=- --- - -- ·- .. -- - ...... o a • 

@'pproved for Release by NSA on 04-25-2014 pursuantto E.O. 1352a