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~ 

INFffUCTION BOOK 

l"Qft 

CONVERTER M-134-T.2 

• > ·~' 

::AND ASSOCIATED·ELECTRICAL TYPEWRITER 

..!-.' 

;.• 

PfH:PARED AT 

SIGNAL CORPS LABORATORIES 

fORT MONMOUTH, NEW JERSEY 

NOVEMBER to, 1936 

. ' &EGRET 

. ,.•-i11 .... _ ...... ~' ,, 

pursuant to E .0. 13526' 
' . 

REF ID:A272976 

S E 0 R E 'f 

Im'TRUCTION BOOK 

FOR 

CONVERTER M-134-T2 

AND ASSOCI1'.TED ELt.CTR.ICAL TYPEWRITER 

No ph•to~tats, photoi::rapilS or ot.H~r retiroductions 

of ma~~r contliined herein nre permissible. This 

~ervic•-test instruction book must be accounted for 

by nmim- to the Director, SiE:,nal Corps Laboratories 

Pre?ared at 

SIGNAL CO~.PS LABuHJ..TORIES 

FuRT MON.~oUTH, NLli J:.RSFY 

~ovemb0r 10, 1936 

f' i.i. C n f T 
REF ID:A272976 

s E e n E I 

By Authority of the Chief Sign&l Officer 

DateLf 

I 

Jtnc.Jb Initials ~J 

No. of 5 copies mede. ---

S E C R E 'i' 

-a-
SECTION I. 

REF ID:A272976 

S E 8 R S 'i' 

TABLE OF CONTENTS 

GEi~KllAL DESCRIPTION •••••••••••••••••••••••• •· ••••••• 

(pars. 1-5) 

SECTiuN II. Dl'TAILED DESCRIPTION ••••••••••••••••••••••••••••••• 

6. Converter ;~-134-T2 .... ..•.•.......••••.................• 

.!!.· Base Fr&me ••••••••••••••.••••••••••••••...••.•.•••• 

b. Keyboard • ........•.•.•••..•..•..••.•...•••.•....... 

.£.· Keybourd Univers~l Bar ••••••••••••••••••••••••••••• 

d. Keyboard Operation Counter •••.••••••••••••••••••••• 

~· Keybocrd Univers&l Bar Contact Combin~tion ••••••••• 

f. Cii~er Disks ••••••••••••••••••••••••••••••••••••••• 

g. Encipher-Decipher Reversing Sr.itch ••••••••••••••••• 

h. Cipher Disk Step Forward Mechanism ••••••••••••••••• 

1· Tepe Transmitter ••••••••••••••••••••••••••••••••••• 

..i.· Plug and Jack Strip •••••••••••••••••••••••••••••••• 

~· Lemp Strip ••...•... ......•.•....................•.. 

1. Slow Release Relay ••••••••••••••••••••••••••••••••• 

7. Fiectrical Typewriter •••••••••••••••••••••••••••••••••• 

SECTION III. I~lSTALL.h.TION ••••••••••• ••••••••••••••••••••••••••• 

(par. S3) 

SECTION IV. OPF~RA TION • ••••••••••••••••••••••••••••••••••••••••• 

(pll.r. 9) 

SECTI~N V. ~AINTlllMJCE ••••••••••••••••••••• , ••••••••••••• ,. ••••• 

-bPage 

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2 

2 

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3 

3 

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J 

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4 

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6 

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s¥fRW.pA272976 

LIST OF IIJ,USTRATIONS 

Photographs 

Fig. 1 - Converter M-134-T2 and Electric&l Typev.Ti ter 

Fig. 2 - Converter M-1J4-T2, Front View 

Fig. 3 - Converter M-134-T2, Rea.r View, Tape Transmitter Remov~d 

Fig. 4 - Converter M-1;4-T2, Rear View, Covers Removed 

Fig. 5 - Converter M-134-T2, Plan View 

Fig. 6 - Converter ~-134-T2, Plan Viey,, Covers Removed 

Fig. 7 - Converter i~-134-T2, Plan View, ,.., 

IC.. Cipher Disks Removed 

Fie. 8 - Converter M-134-T2, Buttum View, Covers Removed 

Fig. 9 - Converter ~-134-T2, Disk Stepping :riechanism 

Fig.10 - Tave Transmitter, Featuring Contact Comb in& tion 

Fig.ll - Electrical Typewriter, Plan View 

Fig.12 - Electric&l Typewriter, Snowint Solenoids 

Fig.13 - Electricl.11 Typewriter, Showing Space t.nd Ccrriat:e Return 

Ccntacts 

Diagram::; 

Fig.14 - Schematic Diagram 

Fie.15 - Theory of Reversing Switch 

Fir.16 - Wirine of Tape Transmitter 

Fig.17 - Ciphf'r Disk Connections 

Fig.18 - Converter M-134-T2, Wiring Diagram 

S i C !i< ~ T 

-e-

.. 
REF ID:A272976 

SEORE~ 

INSTRUCTION BOOK 

FOR 

CONVERTER M-134-T2 

AND ASSOCIATED ELECTRICAL TYPEWRITER 

SECTION I 

G~ERAL DESCRIPTION 

1. The Converter M-134-T2 in conjunction with the properly 

modified electrical typewriter constitutes an electromechanical machine 

by means of which messages may be enciphered or deciphered automatically 

up to speeds of about 40 words per minute. Operation of the keyboard 

of the converter to form an intelligible plain-text message, as one 

would operate a conventional typewriter results in the production, 

by the electrical typewriter, of a printed unintelligible enciphered 

cryptogram. Conversely this cryptogram ma;;- be deciphered by striking 

the keys on the k eybot::.rd of the converter in accordance with the 

individual printed characters of the cryptogram, whereupon the electrical typewriter prints the original intelligible plain-text message. 

The functions or the converter and electrical typewriter end v:i th the 

production of the cryptogrwn or the decipherment thereof. In order 

to transmit the prepared cryptogram to any given destination, ir. is 

necessary to employ one of the conventionol agencies of communication; 

i.e., wire, radio, or messenger. 

2. The Converter :J-134-T2 .r.iay be used to encipher or ~eci.lJher 

messages without the electrical typewriter. In this case instead of 

the cryptographic resultant of the converter keybo&rd operation being 

printed by the electrica1 typewriter, each resultant chfiracter is 

indicated by lamp illumination on an alphabetically designated lamp 

strip. This process requires that each character be noted and then 

written manually, which is necessarily slow and laborious in comparison 

with the use or the electrical typewriter. However, given trained and 

alert teams it is conceivable that u fair rate of speed filay be attained. 

In any event this Additional feature of manual transcription permits 

the use of the converter tmder circumstances wherein the electrical 

typewriter may not be available, or temporarily inoperative, or not 

desired. · 

J. Briefly the features of encip!,ler:nent and deciμherment affecting 

cryptographic security are as follows: 

S E C R E T 

-1-
.!.• A celluloid key tape, with pin holes punched in the five-unit 

code controlling a tape transmitter to progress in variable relationship 

five cipher disks as switching commutators to establish a resultant 

for each end every keyboard operation. Each resultant therefore depends 

upon the initial position or the key tape in the tape transmitter, 

upon the initial setting or the cipher disks and upon the subsequent 

positions of each. 

b. Switching means for establishing various connections between 

the tape transmitter and the cipher disks. 

4. The power facilities required for operation of the Converter 

M-l.34-T2 and the electrical typewriter are llO volts d.c. with a 

capacity of at least 250 watts. In the event commercial d.c. is not 

available, but commercihl a.c. is available a small motor-generator 

set or power pack may be used to obtain the necessary d-c power. In 

the event no commercial power is available, a small gasoline-enginedriven generator may be used. 

5. The folloYdng dimensions and weights apply: 

Overall Dimensions 

Converter M-l.34-T2 - 11" wide, 16" long, 9" high 

Electrical typewriter - 15" wide, 17" long, 11" high 

SECTION II 

DETAILED DESCRIPTION 

Weig:it 

.35 lbs. 

43 lbs. 

6. Converter M-134-T2. Reference is made to Fi&s• 2 to 9 inclusive. 

The converter comprises a base frame, keyboard, keyboerd operation 

coi.mter, keybourd universal bar contact combinlition, five rotatable 

cipher disks opera.ting between stator elements, encipher and decipher 

reversing switch, five cipher disk step-forward magnets 1 tape transmitter, 

plug and jack strip, lBJDp strip, lamp resistance tmit, one slow-release 

relay, multi.contact terminal strip for connection to the electrical 

typewriter, power switch and lamp switch, power plug and cord, power 

fuse and incidental wiring • 

.!• Base Frame. The base frame comprises a modification of the ~ ~emington noiseless type:writer as manufactured by the Remington Noiseless ·~Typewriter Viorl$'.s, Middletown, Conn. All elements of the converter are 

mol.D'lted on this frame in order to employ a. cOIDllercially available 

• structure insofar as practicable. 

SE6RE! 

-2-
REF ID:A272976 ~ E C R E 'f 

b. Keybonrd. The standard typewriter keyboard is used, so that 

the operator will not be required to learn a special keyboard. All keys 

other than the 26 letters of the alphabet and two blanks are omitted. 

The two blank keys are blocked up inoperative BJ'ld are provided in order 

to :nake the plan view of the keyboard symmetrical as well as providing 

guide keys for the normal position of the operator's hands. In other 

words the keyboard is restricted to the 26 letters of the alphabet. 

Each key bar is provided ~~th a contact extension which operates into 

c0ntact jaws. Electrically all key bars are connected in common to one 

side of the circuit and the individual contact jaws are connected to 

the studs of the stationary plate of the enciphering-deciphering reversing 

switch. The individual circuits are connected through this switch and 

then through the cipher disk combination +..o the electrical typewriter 

solenoids or the lamps as the case may be. The key contact jaws are 

of the wiping type and should give a minimum of trouble • 

.£.• Keyboard Universal Bar. The keyboard is equipped with a 

w1iversal bar mounted transversely and directly beneath the key bars 

and it is actuated by the depression of any of the keys. The depression 

of a key serves to rotate this universal bar on its axis, the movement 

being used for two purposes; i.e., to operate through a yoke coupling 

the operation counter; and also by means of a lever extension it closes 

two contact co:nbinations. 

£. Keyboard Qμera.tion Counter. This counter is provided to record 

the number of keyboard operations as a check against the number of 

: characters ,tirinted; the number of step-forward !JO Si tions of the key tape; 

and tbe number of chbracters j_n the message or the cryptogram as the 

.case may be. The counter may be restored to zero at any time by manual 

.operation of the reset lever. 

~· Keyboc.rd Universal Bar Contact Combination. These contacts 

·are in "make" rel&-tionship v:i th the universal bar in such a :nanner 

that the depression of a key causes these contacts to close before the 

individual key contacts are closed. It is important that this relation-

_ ship be preserved for proper operation of the machine. Upon permitting 

the key to rise (return to normal) the universal contacts open after 

tne individuttl key contacts open. The fi.mction of the lmiversal 

contacts in the circuit is shown in Fig. 14. 

f. Cipher Disks. Reference Figs. 6, 7 and 17. The converter 

is equipped with five cipher disks ~>0si. tioned to rotate between six 

st<..tor heads as distributors or commutators. Four of these stator 

heads separate the cipher disks and are provided with distributor faces 

against each cipher disk. Two end stator heads are provided with 

distributor faces internally contacting the end cipher disks and 

externally by means of stud terminals are connected to the key contacts 

-.3-
S E 0 R E 'f 

REF ID:A272976 

and the electrical typewriter solenoids or the lamps through the 

encipher~ecipher reversing switch. Each cipher disk ~resents 26 

segments on eacll face which are in contact with 26 spring and ball 

contacts on each stator head. The connections through the stator 

head a.re direct. T'ne segments on one face of each individual cipher 

disk are wired in random fashion to the segments on the opposite 

race of the disk. The particular wiring for each disk and for the 

combination is shown in Fig. 17. The exposed periphery or band of 

each disk is designated in 25 positions alphabetically from A to Y~ 

the 26th or Z position being designated by a numeral. The numerals 

serve to identify the disk in addition to indic&ting tl1e 26th position. 

Each disk is readily removable and interchangeable with eny other 

disk. No through shaft is used, each disk being rotatable upon a 

spring tensioned ball in the center of the stator hea.ds, and in removal 

any particular disk is simply withdrawn_from between the stator heads. 

In addition to the designation band each disk presents a scalloped 

edge tor two purposes; i.e., to facilitate setting of the disks by 

hand, and also acting as positioning centers in conjunction ~~th the 

step-forward mechanism. In setting the disks to an initial position 

they may be tu.med in either direction by depressing and holding back 

the button extensions of the step-forward pawls located directly 

behind each disk position. As regards electrical continuity tnrough 

the combination of disk and stator heads there are 26 wires connected 

to each end stator head and 26 circuits through the disks no !!latter 

in which position the disks happen to stop. It will be seen tlmt 

26 through circuits are provided at all times even though the rel&tionship of all circuits is altered by any disk movement. One purticular 

circuit is traced through the combination in Fig. 17. 

&• Encipher-Decipher Reversing Switch. Reference Fi;:;s. 8 mid 15. 

This switch is mounted beneath the keyboard. Wld is operated tnrough 

a rack and pinion drive, the pinion being extended to ~ knob in front 

of the keys. The switch acts as a combination of 26 double-pole, 

double-throw switch.es in the 26 circuits from the key contact jaws 

through the cipher~isk combin&tion to the typewriter solenoids or 

lamps as the case may be, (Jlld it i'unctions to reverse the cipher-disk 

combination in these circuits. This feature is necessary in o~1er to 

.maintain the reciprocal relationship between the resultant obtained 

in encipherment with respect to the resultant re11uired in deci;;hPrment. 

As an example and as shown in Fig. 15, wi t:a the swi ten in encipher 

position and striking the A key results in the printing of a G. Then 

with disks in the same position and switch thrown to decipher position, 

the striking of the G key results in the printing of an J... 

h. Cipher Disk Step Forward ~echanism. Eech of the five cipher 

disks are equipped with lndividual stepping rnecl-1l:.Ilisms com;.Jrising a 

llagnet solenoid, tension spring, step-forward ,;·awl, ond location roller. 

S E S R E T 

-4-

... ... ;~·· '~ 
REF ID:A272976 

S E C R E T 

The individual magnets are operated by the tape truns.lli tter. Upon the 

circuit being closed ti1rough a given magnet, this magnet draws dov.n tl:~e 

core building up tension in a spring and near the rnd of the stroke a 

step-forward .l?awl is drawn in to engage:nen t with a ratchet tooth on the 

pertinent cipher disk. Upon deenergization of the magnet the power 

stored in the spring is delivered to step forward the cipher disk tl1rout;;h 

the step-forward pawl after which the step-forward pawl is disengai;ed. 

A location roller and arm is pro;::>erly conjun~tioned witn thii:> action to 

definitely establish the stop position of the cipher dink. This roll9r 

is beneath the cipher disk and falls into the scalloped edge on the 

periphery of t.>ie disk. The step-forward ~1awl arms are extended through 

the cover of the converter into buttons to permit ~1e manual disengagement of the pawls from the cipher disks in order to facilitate the 

rotation of the disks by hand. The buttons should be depressed Wld 

moved to the rear when disengagement is desired. 

i• Tape Transmitter. Reference Figs. 10 &nd 16. 

(1) This unit is a modified Western Electric Co. multiplex 

transmitter 1-B as used com.~ercially in multiplex printing telegraphy. 

This transmitter operates on the five-lIDi t code from a μerfor&ted tape 

to establish five contact combinations in marking or spacinE:; positions 

dependent upon the arrangement of the code perforations in groups 

transversely disposed on tne tape. There are 32 di ff eren t rJermu ta ti ve 

possibilities in the five-unit code. The tape is ~rovideJ Llsc T.ith 

a continuous series of perforations in line longitudinally, the spacing 

being identical witn the spacing between code groups, to permit progressing the tape consecutively from one code group to ti1e next. Tne 

tape transmitter is equipped with a tape groove and guide; a latched 

die to permit inserting the tape at any desired code grou~; A stepforward star wheel engaging the step-forward holes of the t&μe; five 

code pins conjunctive with the code-eroup hole positions of t!1e tape 

and operative upon five contact levers in marking-spu.cing positions; 

and a magnet acting to depress all five code μins fro~ tape enbugement 

and to step forward the ta~Je by ratchet move;nent on the sU.r wheel tu 

the next code group, a.fter which the code pins arc released to ~;.su~e 

their tape dictated positions. V.'hen a code pin is i1eld dov.n by the 

circumstance of no hole in the tap~ at that ti~e the asRoci&ted contact 

lever is held against the spacing-contact bus. un the otiler hu.nd, v.i1E.tn 

a code pin is permitted to rise tnrough &. hole in the tape, the cont.Hct 

lever is moved ove~ to the m~rking-contact bus. 

(2) The modification of ~~e tape transmitter co~μrises the 

addition of a contact combinution operated by tne m&gnet armature 

and a wiring rearrangement to adapt the unit for its ~·roi-'er function 

in the converter. 

S E 0 R E 'f 

-5-
§EJ? 0 J,Dm:A272976 g J....I v J.\. .LJ .L 

(3) The function of the tape transmitter in the converter is 

to step forward the ciphc;r disks in accordance with the key tape. The 

kr:y tape is m1:1de of celluloid rather than paper in order to permit longer 

repetitive use. Ell.ch code group of the key tape establishes, through 

the code pins and contact levers of the tape transmitter, circuits 

energizine the pertinent cipher-disk magnets selected which act to step 

forwll.rd the pertinent disks one position, leaving the non-selected 

magnets in normal iJOSi tion. The circuits from the disk magnets to the 

tape-transmitter contacts are connected in series-parallel with respect 

to the contact combination of the tape-transmitter magnet, in order 

that the disk m&gnets be not energized until after the tape has been 

stepped forward and all pins and contact levers are in position. '!be 

necessity for this tape-transmitter, magnet-contact combination depends 

upon whether or not the common connection from power is connected to 

the marking or spacing bus of the transmitter. If the common is 

connected to the marking bus, the magnet contacts can be eliminated, 

but if the common is connected to the spacing bus the inclusion or 

the magnet contacts is imperative. The common is normally connected 

to the marking bus but may very readily be changed to the spacing bus. 

Access to these busses may be had by removing the cover plate of the 

tape tronsmitter. Tne advantage of the use of the marking bus is that 

a titpe hole means step forward of the pertinent cipher disk and is 

consistent Yd th the telegraphic viewpoint of marking signals. On the 

other hand, tJ1e advantages of the use of the spacing bus are twofold; 

first, the transmitter contacts are somewhat more positive than in 

markin£..: 1-'osi tion due to sμring tensions, end second, being inconsistent 

v1i th the telcc;rephic view point, offer possibilities in cryptographic 

security because the tape no-hole positions normally known as spacing 

then actually become markine insofar as the cipher-disk magnets are 

C<Al cr·rned. In ei tner event it will be noted by reference to Fig. 14 

that the cipher-disk, tape-transmitter circuit is closed thr~h the 

ccntacts of a slow-release relay which in subsequently opening clears 

th£: circuits for spring steμ forward of the cipher disks leaving the 

circuit normally open. Note: All intercommunicating stations must be 

in o.t;reemen t v;i th regard to the use of the marking or the spacing bus 

for disk steμ forward • 

.i.· Plug end Jack Strip. Reference Figs. 2 and 14. Five plugs, 

C•Jrdf: and jack~ ere provided which are installed in the five connections 

between the tape-tra.nsmi tter contacts and the cipher-disk magnets. The 

plU£s ure connected to the tare-transmitter contacts blld ll.re numbered 

accordingly frcm 1 to 5 inclusive. The j a.cks tire cor..nected to the 

ci_:Jh(·r-disk macnet::i and ti.re also nwnbered respectively from 1 to 5 

inclusive. Accordi~bly, these connections may be patched across as 

desired ·b.Ild ci1u.nr,ed c.. t will as a v&riable feature tending to further 

eY.tcmd the cryptosraphic security of the !Ilachine. All flte.tions must h~ree in thi~ respect. 

-6-
REF ID:A272976 

3 E G R J; T 

1· Lamp Strip. Reference Fig. 1. The lamp strip may be used for 

the indication of resultants when the electrical typewriter is not used. 

The lamps are r:totmted beneath a bakeli te strip mich is provided with 

lettered opalescent inserts. One sp~re insert is also motmted on the 

strip to preserve the symmetry of the combination. The lamps are rated 

as 2.2 volts, .25 ampere Ttmg-Sol flashlight bulbs, non-focusing, as 

manufactured by the Tung-Sol Lamp Works, Inc., Newark, New Jersey, or 

er.iual. A 400-ohm resistance unit is connected in the lamp common. 

1. Slov: Release Relay. Reference Figs. 4, 8 and 11+• The ftmction 

of this relay is to energize the cipher-disk ste_:.;ping magnets for 

sufficient time to insure a complete core travel and to subsequently 

clear the circuit to the normal or open state. This relay is of 1300 

ohms resistance and is equipped with a copper slug for slow release. 

The contacts are an application of the Burgess inclosed type microswitch. 

Tnese contacts have proved veyry dependable in service and should require 

no attention. 

7. Electrical Typewriter. Reference is made to Figs. 11, 12, 13 

and 14. This typewriter comprises a modification of the International 

Business Machines Corporation electromatic typevn-i ter. The modification 

consists of: the incorpor&tion of 26 solenoid magnets with drag links 

arranged to operate the 26 letter key bars; the addition of a tmiversal 

bar operating a contact combination upon the depression of any key bar; 

and the incorporation of an automatic five-character space contact and 

solenoid magnet operating upon ti1e space bar; and an automatic carriagereturn contact with solenoid magnet operating upon the carriage-return 

key bar and including a warning bell signal. The spacing contact is 

operated b:,r every sixth detent of the tabuh.ting rack. The carriagereturn contact is operated by a stud at the end of the tabulating rack. 

The Ydring is terminated in a plug strip on the bnse front of tile 

type~Titer proper for engagement ~it.~ a jack strip at the rear of the 

converter. A plug and cord are provided for connection to power for 

the operation of the driving motor. 

SECTION III 

INSTALLJ.TION 

8. Mount the typewriter on t.~e baseboard as shown in Fig. 1. 

Position the convert~r in front of the typewriter and engage the plug 

and jack combim·. tion firmly. Cla.mμ tht converter in place on the 

baseboard by tightening the wind nuts provided, otherwise the shock 

of operation will gradually disengage the two machines. Connect the 

power plubs of both m&chines to 110 volts d.c. The driving motor of 

the type~Titer will operate on either 110 volts d.c. or 110 volts a.c., 

60 cyc~ea; but 110 volts d.c. is required for ti1e converter. Operate 

SEOl'.E'f 

-7-
REF ID:A272976 

BEORE'r 

the power switch of the tY!··eYrTi ter, left side of keybo1;rd, to "ON" 

position. Operate the power switch of the converter to 11 0N 11 position, 

leaving the lamp switch in its "UFF'" po::;i tion. For lamp oper& tion 

sim;:ly disengage the typewriter l:;lld operate the lamp switch to "ON" 

position. 

SECTION IV 

OPERATION 

9. As in ~,e operation of printing-telegrnph mncnines e very 

definite cadence or in-step operation by the operator is required. 

F~.ch key must be firmly depressed 8Ild released without overlap by 

another key, or otherwise & faulty encipherment or decipherment will 

result. 1'fter sufficient iJr&ctice t11e oi,erator will time ti1e striking 

of the keys v.i th the sound of the disk step-forv:e.rd mechanism. A key 

must not be struck until 5fter tt1e disks h&ve stepped forward. The 

key tape position, encipher--0.eciph€r switch !)OSi tion, ciphe:r-disk 

position, {:.nd ta.;ie-transmi tter plug and jEck setting must be cuecked 

ca.refully before each start. 

ZECTIO~i V 

:.:.AD'lfJk~CE 

10. J....i..l functiCJns shou~d be ci1eckcd iieriodically, particularly 

the ta'pe-transmi tter Md cipher-disk stepping features. A s11ecial 

tape rriay be used for thi::; ~urpor-e a~ for example ste,i.ping forward ei.ch 

disk & given nwnbcr of times und tJ:1en checking for performance, or the 

tape may be left out of the transmitter end nil disks allo1;ed to step 

under keyboard OjJerc..tion. T'nc various wiring diagrams should be 

studied for & correct l:;lltlyEi::; of bD.Y trouble which m&y occur and 

beforP. ·titternpting to ;:u..ke any Hdjufitments. 

_a_ 
REF ID:A2 76 • 
• • 

SECRET 
• REF ID:A27@t76 

SECRET 

SECRET 
• REF 

SECRET 
REF ID:A272976 

-SECRETSEC A ET 

5 - Converter M-l34-T2, Plan View 
REF ID:A272976 

SECRET 

' 

Fil~>~>;>~~ li·l34,,.~~'~tlew, ~ers llltom 
REF ID:A272976 

SECRET 

,, 

I 

J 

' 

0 

SECRET 

Fig. 7 - Converter M-134-T2, Plan View, 2 Cipher Diske Removed 
REF ID:A272976 ,,,. ........... -- e Lt It LT -

- SECRET 

Fig. 8 - Converter M-l34-T2, Bottom View, Covers Removed 

REF ID:A272976 

SECRET 
REF ID:A272976 

S!CRET 

SECRET w 
REF ID:A272976 

SECRET 
SECRET 
' -· 

REF ID:A272976 

-

__________ O _T._~ __ B_U_L_A_T_1N_r,_~--------------------------. 8 12ACI('. CONTACT 

- ~- ~CJ_· SPA CE 

. · - SOLENOID l CA~~IAGE 

eETVi'N CONTACT 

\\? · CA~li?IAGE · eETUR.N 

SOLENOID 

-- · f PLU65 d JACKS -------------0.. ~ . I -->--' --

TO OTHE.R. 

SOLENOIDS 

. ~ TYPEW~ITER 

.SOLENOID 

,-

·-

.. 

-----~-----

'--, .,··· ,,:] L_. .5-~"'~· ; 

. L. 

_,.. ·TEv'v r.1 T£R 

\J • j · \'f_ R ~ .'\. L 

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DISK MAGNETS 

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