US1684028A - Coding and decodinq apparatus and code changing device therefor - Google Patents

Description

Sept. 11, 192& 1,684,028

S. HOLE CODING AND DECODING APPARATUS AND com: CHANGING DEVICE THEREFOR Filed March 4, 1927 8 Sheets-Sheet 1 ave throw zww mm Sept. 11, 192& 1,684,028

S. HOLE CODING AND DECODING APPARATUS AND CODE CHANGING DEVICE THEREFOR Filed uarcn 1927 e Sheets-Sheet 2 Sept. 11, 192&

s. HOLE CODING AND DECODING APPARATUS AND CODE CHANGING DEVICE THEREFOR Filed March 4, 1927 8 Sheets-Sheet 3 lll llIl lIl!-H-1 l- Sept. 11, 1928. 1,684,028

- 5. HOLE coDING AND DECODING APPARATUS AND CODE CHANGING DEVICE THEREFOR Filed March 1927 8 Sheets-Sheet 4 nvvzw row Sept. 11, 192& 4 1,684,028

S. HOLE CODING AND DECODING APPARATUS AND CODE CHANGING DEVICE THEREFOR Filed larch 1927 8 Shets-Sheet 5 fjfjjij V Sept. 11, 1928 S. HOLE CODING AND DECODING APPARATUS AND CODE CHANGING DEVICE THEREFOR Filed larch 4, 1927 8 Sheets-Sheet .6

"HIT nlll ini" 'n' i INVEN TOP:

Fri-vs.

Sept. 11, 1928. 1,684,028

5. HOLE CODING AND DEQODING APPARATUS AND CODE CHANGING DEVICE THEREFOR Filed March 4, 1927 8 Sheets-Sheet '7 Sept, 11', 1928. 1,684,028

s. HOLE Comm AND DECODING APPARATUS AND CODE CHANGING DEVICE THEREFOR Filed larch 4, 1927 8 Sheets-Sheet B nvvenfon Patent d Sept. 11:, 1928'.

new en s1; Air-Fe 5,-

- snmEY HOLE-:01}? AL OIIR'NE; fiatiiss'o'ciis' amen in c m m iii. -bit C mist-@1- A pplieat ion flied mn mz iscginnt-wing-155 This; invention relates to" -oofc l ing a i ind' de 'ifdjsl coding nppzn atus and to scogl e chjzinging fde'f vices there-for, angl; the type of g p p'z nntiis concerned is-thzitwvhefeixifmie set 5 keys is operativiy'eonne cbed to 'a set of sign-keys constitntingf writing through a, code-changing -clevice tqmjpfisizit least two transmission 'jmembeis. whereof-j one is movable in .relz tion to the. othe and v each has transmission point-sfonelfon-"eaeh key, operative meansdspr'oyitled passing through the transmission inein-bers by way.

. ofsziicl transmission jp oints jnn'dconnecting the keys'in. pairs, oi1e of one 'setj to one of I the other set, and thesa-id transmission points of one member ni-e=zn rgingednllto i'e'g-istel s'ii multzineously withpthos e on the 1 othe and,

are 150, spzieed. that when" one. transmission nieinbet. is steppe(iflfone .s p:ice lrelatively'l'toj: the other'eaeh 'jt ansmission point -of. .o ne

memberwill be iigliianced to; the p eeeding" one of the other mmber with the,resn-ltxthz t iniembe ts whereof [one my be I individual-keys in one set will IiOWzCQ QRBIFiIfiGf with different individmtl keys. inthe -other set, and wherein aiitomntiej iien-ns arranged to'be actuated-by the-.ope ia-tion of-one-go'f Ithe signke'y is provided for moving. the mow ing'device;so as-to change the pairs 'oflg ys- 'j--One'=-emmple'of code chanfging device" of I .B 'iti-sh jL-ettis Non 2OZ2573 wheieofleaeh ha a plurality 'OIT'UQHSmiSSiQII points connected togethenby means of one or more coupl ngtransmission ,m'ember's .l's t-' 4 mite-d between them, Bfl Cii'Of which-coupling shall be I'encl'ei e s 1 points 'cpnneote d in;

inigfs of} space betivee' members. has two setsoftrjzinsmissiqn points on opposite ideas, some of 2111.05 the points ing'the-operation of coding a message, but.

teeth), one nllotted lto n ovable ftr'iinsg members dutin'g the cbdi-nglo f theinesst e.

on the fconp li-ng z-meinliefr i-re not'- all .con necte'd eaoh withthe cor esp'pndingtmnsrnis "S1011 point ofthether' s ton the saline c0u,-

. ea? able conphnggmexpbersib ween-.twoterminal ni bli- 'pling-niember, bnt-etleQst'on-ormore points v of :the one setq -re crosscon'ne'eted with qn e 1 or morepoints. th'eipthep' set to'wh h they do not"correspond when leonsideredin rela-'; tion to the.transmissionpoints on.the termi-" -i1a1 members. Fop-exam'ple', assuming that;v

two sets of points on opposite faces of a ro-f'.w

ta ry coupling member. in the fofm of a disc are lettered consecutively AZ, the five let 'ters A-E of one set lfiaybo croscohn'ected in order to thc five letters F' J in" the other-set, the five le tize rsl J oi'the-fil stse1; 1nay-be c0trespondingly connected" to 'the" -five letters A-E ofthe secondiset, and the remsiining let-f tors of t he' first-set may-beiconneoted-in-brder v directly each; with the ,sam'e:letter of the ters. of the two sctsthafi, aleicross connected nmy be increased o r' deore'asedfa-s desired) 11 11183. of the" let tersh-of'the on'e seflinayjhe inanne :i nq'ch ia feagiii-ekf she-in- 'a plurality 0f vfeed mechanisms, each con trolled bylone o'f-s'aiid oontrol inembers (e.

byteeth thereon) and zill'otted enoh'to one of said"' nibvaihlo firans nliissiqn 'm'e'inb for. feed- "ingth e same. v 1

According to are rcitia ry members having ezioh e'nin g" of multiples fthelteof, fan timeout-1101 are providedezioh fwijthteetli (e; V

teeth)"; and fatchef; l"meohanisn1s,-oixeop= orati've' on each ring qfiteeth, arefirmng ecfto control-rilelnbe 's.

"Conveniently; eaeheqid oonh'roh itiemb err s has a m of teeth (-e' g.,j. i n-heform fof too thed 'xack) and loontrols feed mechanism, c

disengage the same froxhr-izh'cohtmo memlie when-the latter ijs' htoi OyMjisQohQehdfiog ticin zi'd'efient is provided whlchautom; deal;

so. (lisp osed 'a'sto'frelease-said dehe'nt' from the.

"i th'ei 'conhtol member j a carriage of atypewriting machine.-

A alfiuftheifaltuize oftheiinvention, the movable 'tmn'sl-msslon member's v of the other Jsaii d .jmerhbel Conveniently,'t-he rows of teeth of the several control members dlfi'er. one from another In length of therow, or 111 number-0r posit ion of'the it'c'efih'i li ill}? low, o'r'in the spapmg of the 'teehh, oi the lengthio f the in- .dwldual -teet-h',- for the purpose of 'int'rocluoingstill iurthen complication.- I refe'rab ly,JoJJeor'nmre of-the code-Chang; mg control members are o'pei-abi v'el 'neotedto a-ndaottuited by the chrri'a'ge: of. a

typewriting mzi chine-compr ish g one of the sets of'keys aforosmd;

may according-to 'anothep feqture. of the-im 'ventlonfbe 1n the form "each 10f av rotatable 1 e.tohet wheel, which xnayi beope ted=- b l rack-and-plmon" mechamgm, for example 'by Accordinggtol yet-another feature of Hie inventiioh, ez 1c h of sz tid eonfrol' members is so mounted as Yjt'o be readilyren iova hle from rea chly rep =laoed by its support :uifl/o'f to he another cont-r01 member.

wedding or deoodihg apparatus 'of'the type a pair of te'rniin'al :t rzi-nsniission members gi' end ;d1s.cs;)1are arranged facing one mission. oints (e. I jports) wxilieqeof --the The. toothed control members h'fbf fiifl "described, .acodekihahgihg device wherein point'sron one-said mehihef liej opposite those I Y hi'e'an an'ged' col-finally between said tem ni; 'nnltfmembefis en'd Connect 12110 points; onv the latter "tog'rtheg wlfich coupling 'Jxn'embep 017* members ale' rofxitable relatively to Said ter- 1 members-land hzive ea oh the tnansmi's ;1 on' -po1n-L -s'"of one of; Sets; connect-edm .a

Coilve'nicht each coupling 1110mbef.and- Q'n' enamel member fireeach l ll, fliezfovm offdlsc's mou ntedonia shaft fast-.011 ,th'cao't-her Wit-1 m n 5( .cod

the

ports) mlxejd .0 wdefiv-H211the tx zmsmission. points of-t'he-"o we -set, ohzrttaoterizod' inijtliat an terminal memberisgnofizxmble ih re oi'niedor provided eedi'rw- "eeeorcrngtoanother feeture'ei the IILVQIl v outer iuee'und grooves inseninner face thait' f Aicouplingmembems s'et ferth in the prepu ragmph comprises in comb motion,

tion-,'gt.wo end plates and, an intermediateplate-arranged fece-to-fee'e}, Whielr'endjslates ha-vereech .11 set of transmission pors in an eommuniea teeachWith'one of saiclporte; :ind

' of control devils-e according to the. invention taken ontheli-ne 8-1-8 in.Fig;ure;: v feedumeehenism for the code-changin .de

said.inter nedinte,plate has perforations in-'- rzinged to conriee't:-the grooves in one end 3 plate each with a groove 111 iheiother and;

pl ate.

" Other features of the invention:

:miongsbot'ners, to. thef'eed mechanism, and

' other forms of control device fortlie movable transmission member's aforesaid :Will be de scribed, hereinafter and pointed out 11 the claims- 2 t ;v

The -mvent1on 1s1llustra-ted diagrammatipeny'in'g drawings,;.wh'erein Figure 1 ,iso frontele-vetion ofone0r1n of-"coding' or decoding apparatus eoi'nprising 'ee lly and by-way of exrinple in the jeeeoni' iwo type-writing machines and one fiornfof COle .eha,nging device actuated by oneio'rmand. i 1 1 Figure 2=is en endielevnti'onof one-type Writing machine, some parts being omit-ted; Figures- 3 end 4 am front elevation and end "elevation,- respectively, illustrating the therefor shot-v11 in'Figure 1;

eode-ehangingldevice and control device Figure rezi e s'ectionteken on the line.

in'Figure 3 V 1 V A V Figurefi s-wsectlon ia'kenon theline GT.G in-Figure 5, and

'Fi nre 7 is a section taken on the'beni;

line 'Z--7 in 'Figiu'efi"illustratingthe codechanging device; 1 Figure 8 is everti'eal sectionel elevation Yieennd-the eont rol deviee o-f the feednieeh} feedmechenii I Figure 11 1s a: deta l front elevatieu..ot.-

the ii 42- anism; I

' qgure 9. 11 end welevat-ion pertly n sec tion ef 't'hepa-rts shown i'n-Figure'B. and

Figure 10 isie detail mew-ofipe t of the i an a. dllferentxpernton;

pert o'if-"the feed meeiizinism, and v F" e12 is 1 a horizontalseetion tell'cen on 12-'-12l-11 FigL1] 3'11; 'F glll e '13 is-a .vert1eel-.seetio ntaken on the line l3 fl'3r:iin Figure-3. Figures 7-13, i elusive, are drawn one scale lerg'erthan that ofjthe ot-her' figures. v Figure 1-; isuf1-0ntelevet.ion of n modified 'fo-rm'oi' eontrol-deviee for the code-changing;

device;

line 15 -15 in Figure'l l, and B A Figure 16 is-n plan view 0; r-ne some, partsbeing omitted for the sake of cleerness;

Figures 17 and '18 ere end. 'eleve'tion'a-nd form 'Iof ro-ieryeontrol deviee, ind

1- 8; .29, 'respeetii'elyi to ex hgiiist-zapperirtus V ilfprovided for it'on' the adjacent end of-the showing Figure 15 is an. end elevation taken on the front 'qelev; e pectirely, f ieno'ther form of control devieeyend' p r Fi'gure ll) is on end elevz tionzof a modified Figure 2.0 is a sectional; el eifzition -tziken' on the-line 20'2O.1-n' Figure-19. f L 'drel'er e'e numeralsdesigrmtef 'l-he apparatus.

ypewriti'iig"nukcl'unes 21, 22, respectively, boxes 23, 24:, respectively, of-Ltube's 25,-2 one. ofeach-s' J code-changing dev ce 27, zindi-hyiether ing actuated-manually,however; i's f perzijied mrtoi'natieelly bya one of thetypewriting me chines and eompr s'esa' pluralityof movable members for changing the code. v v

f, the eode-ehjen Referring to Figures 3 -ing device 27 comprises seven-transmission ineinhersfil to 37, whereof terini'nel tr en's-.

v rmwn in"Figures11 uiid2 compr ses two stun of'end plates or discs nndiheve ports Elstonnected to thetubes 255-26,:1ndthe membe s -32, 3st, 35, 36 are eouplingl members, air-.

iungedj1n sequence andwlo'ustrueted as. .deseribedheremaIter. -:-'I h eend-pleteor'd sc3i is rigidly mounted .onor-inuesiral ivith=one end-oi a horizontel-be se ,nd non-rotatablyrc-erri'es one end' of- .21 he Zontul- 'shjgif 40; The five coupling {members j32 1130 f36f3ire threaded" on the shnzftAOflvhieh cerri'es a tf-its? other end the other end-plate or disc-Millet beers with its-periphery on :reurved' slipper-t bese 39. {A sleeve 42onth'e sl1'n'i't-AO eerri'es' thecli'sc 31,:md eunut lB i-n the form of; eap 1s screwed on the free-shouldered end ofthe shaft 40 end holdsthe transinission nembers ust so tightly togetherth'zrlj-each of. them,

eneept the end-plate 3.7,;i s remit-able about the. she t independentlyiofi the others without permitting materiel passage of air between their edjueent laces. flhe" d-ise 3 1 haslloles Han 1ts penplieey eorr'espdnclmg in number All'the coupling members may be construetecl. alike so tlmt jthedescription o'f-one ofthern will serve for the-others. Referring 7 to Figures 5, 6 end 7, the couplingmember 32 comprises three'plates 47-, 48, 49 secured fnee-to-feee one on unother, whereof-the two outer plates 4:7, 49 have transmission points 'forexample in crcle the coupling meinheis 1nd replacing. them on the shaft 40 a; rhiierent' pos t-ion, the

' supply ducts 87. whereof oneimm ,viglecl if dcsired,' al thongh t re are p "ilror cler to balance the suct n-a twncnthe lure 10, thereby .rocking the feed paivl's: 76

intut-heir inopera-tite posit-ion shown in. th: l-t

ngure.

prisesifive valve hoxes filhax'ing each inders 1 .0. i This hte'ck is arranged be e'perating nieensffl ignizes 7T4, 812m (:11 9). c!)

e the top oith'e spindle 85: that. extends 1159 block 80. These pawls W with o'ne- 01" the detachable: ra c-ks. 6% and ,zire (hilt-rolled by the latter., are connect-ed; .to' a parnllel linkage S5 whereof the lower linlc 86 hen-rs with one-end on the-top of the spindle Si of the allotted valve-8'2. In the position i of the pa wls 83 shown inl igures S-, 9 end 11, e ich valve 82 closest-he ccnneetienhetween the snction'supply ducts 837m the nloc'k SO and tile. ducts SS Whichleed by wiry the tubes 89 each to one of the-cylinders 70.- 1L tube 90 (Figure'l) hzis two bri-tnches'tll, connectingthe exhaust.epparetus-g30 1 the rah-es. \Vhen: the vi1v $182 Fire-"in .t-he treine upper positon cennectiqn. 1 est-ehlishedbetween thetnbes )1 and the-tnhesSQ.

\vise' ti'o111 right left zis viewed 'in Figures 1, 3 and-Shy the open n of the typ'cwritlng machine 21, the pa. 5 83 are depressed against the action of springs 92' heloiwthe valves 82, and are released in turn therehy I to open commumcatlon. between the tubes 91 causing the feecl-mechanisn l.nfqresn-id the ceuph-ng members in turn. As: clearly shown in Figure 8, theu'ncks are arranged with their teetlrin st'nggercd relzitiqn 50. as

to cause the valves. Site heepei' ated succes .wively. The length of each t-Oiith.lTlllZfibQ equal to. the spircetrzi-velled hy n carriage luring the wr' mg.ol'jfive letters; H 'natively,ench'toe'th may be longer or hcrte-r Alteruse required. -.Atterl-a valve 82 .been

Opened hythe 'clcpreseion 0 :t :cne v be closed.b the feed of the carriu the depressicn (if-itlie'next key.. Onlyone rotatable cou1 ling nre111'ber is prbvide-d be tween1t\\i0 --tcrmi-na1 .inemb'ers, one eigboth 0f- \i'ihich 'mziy also he ro atable, theni'thear rangeinentnf the teeth will preferably be such that zrx'nlve $2 contrel-lmg-the reed; ct the coupling member will be opened m u1nen- Ahlock 80 (Fi ures, 9,- 11 and ey -Ont v i velvefbfZ control-ling thesuctien each; tQ neOfsznd eez'. said-feed. mechanism and; saidtopt-hed 'trcldeviee is. in the pcsiticnjshm vnin. E g? ton 71 is, returnedto its upper position by the pring 7 t,' 2u1d the 'ho ldingifn in -lsi'lfl' same 'or another end. i typewrittenmatter w e l-th eerria-ges ure in ;t-he..p0fsiti0n .shown inbrolien" lines in Figure 1",: each cam-94. willeo-cpera t-e .50} i 'Wi Pliit p wl and ilepremjt. so: far

(F g re i (if the of the -toothed rack fifL- Thera cks .64 thusfree to be returned to the firstie nd. Pg-' sition and injso doing'a; stop QQcai-ri'ed by each of them'co-actscachwithfibrin-7... oft-he detents 95. and-releases .th hands 83 5 that they can return. to their operative p0 slt on against the racks 64;

When the keys of thetypewritihg machine 21 ;1 re depressed the sign-keys bf. the'typewnting machine 22 will-beeperated in the same manner as describedinthe prior pat;- 9 ent, aforesaid, but thecndeeehanging (leviee will be actuated not manual-11y asinitlmt,nntchine, but automaticall f y the,- eper zttijon of the keys. When arke'y' of; the" ypewriting machine 21- is depressed. thefca-rriiige; 61.}.0

niqves one step in the usual manner and (lIlVGS theracks 6ft Qf'the ecnt-roligle vic'e end:

' 'wise; Assuming thzitfthe'cddechzi-h'gingt de- Vice 27 has been'zerq-ized'l gind. thatQt-he e'o-nv nresl3, 4, 8 and 9,, i. e.i in itsi nitigil position. atloneend 'of its travel wiith the .p'u. 'll 83 Close to the first t'oothjof the front. 1221964, when the first. key is. clepressfd'fitlie" 1 l 83 will snap up into the hettonipi' the. firet-gg p and 1 I in' so' doing will 'op ersitel th'e yulive'- 82 sol-{ s 1 and 89, thereby admittingsjuc tiohto; the '1'- inder ofthe feed mechanism fa ll'etted thereto. cause the coupling member 32.t0 he fed one space-hy-thevpawl 76,. When-4L see nd-key is depressed the-Valve 82 is closed a nd the pisprev ent retation. Of the. cqupl-in in either direction. 7 he set-ting ately onefkeyhajs heendepressed I v ,;key.- .'is {depressed-{fer the second letter the s'eeond.jtcothedfrack .6

comes operative ina like mm :incl .'.c ,zi-ujsesthe second cofuphng member 33 to he iedjene space, and'soon with'theother teothed rnclts (5 1- and coupling memljers allottedthereto i-a The piston .7 will. descend-fend of a set'ofsign-ikeys, which points are-connect-ed together in a-mixed order and are arranged to cooperate respectivelywith transmissionpoints on an adjacent transmiswsion -member, which points are so spaced that when one member is stepped one space relarespectively eachwith one of the transmission points of said terminal ineinbeis,' -said means includin one connection only extending from each'hey to the code cl'iangiii'g device, and automatic means comprising a-plurality of code-changing control member's equal in number to the number: Of.S21.ll--COL1- .pling transmission members, operatively -'al-.

lotte-d each to one'ofthe'liitter, and adapted to be actuated each by the operation of one of said sets of sign-keys, and ap-lu'rality of feed mechanisms, each control-led by one'ofsaid control members and operatively connected each to one of the movable transmis sion members for feeding the same.

"I. In coding or decoding apparatus of the character described, the combination of a of cliaracter-producin sign-keys, a seciid set of signkeys whic is a duplicate of 4 ie first set, a code-changing device compris-.

1. o at lcast one rotary coupling transmission member movable between the terminal mem bers, each or" which coupling transmission members has two sets of transmission points connected together ina mixed order, one

point in each set for each key of a set of signkeys, arranged to co-operate each '\VIltl1 D.- set of transmission points on an adyacent transmission member, i'i-i'cans interconnecting the keysoi one. set each with a key of the other set by way of the transmission points' of the code-charming device, each coupling member having a ring of teeth spaced apart to correspond to the setting required for changes of the transmission points, atleast one toothed control ii'ieinber, one for each rotary coupling n'i'en'ibei', and at least one ratchet feed mechanism. one operative-on each ringof teeth, and adapted vfrobe actuz'itedeach by the teeth of one of said co itrolineniloeis. i-'

8. In coding O1 decoding apparatusof the character described; the combination of a code-changing movable transmission Imember, liarin'si a plurality of transmission points. l'ccdmcchnuism for moving the transni sion member step-by-step, a control meniber having-a row of teeth adapted to control said feed mechanism, a cam at oneend of-s'aid row of teeth so shaped and disposed as 'to cooperate with the feed mechanism and disen:

' gage thesan'ie from-the cont-rolniember when the'latter is sit'uated'at one end position, a detent arranged automatically to retain said feed mechanism in the disengaged position to two terminal transmission members and which it is brought by said ca'm, and;-a's1;0 ;ei1 said n'ti o'l member sit-'11 'fted-"at the other end ottlie'row 01f teeth andar'ranged to'release.

sa idde'tc'n't' oin' the feed mechanism when the control member is atlthe other end position.

code-chai-igi"ng device comprising-a plurality oi: mo able code-chang ng transmission memq.

hers having each a pluralitypf transmission points, a plurality of-t-eed mechanisms lot-ted each to one of. said movable tra'ns'mission members for, moving the latter -step-by- '='s;tep, a plurality of control members arr. ranged each to control one of said feed. inechanisn'is', which control members are so airan-ge'd as to differ one from another "in their-respective operation on their "allotted transi'nission neinb'ers.

10. In coding or decoding apparatus'oftl'ie character described, the combination of a code c'lianging device comprising nf-plurality. elf-movable cod'e-cliangin transmission incinhers having each aplm-dlity of transmission points, a pluralit-y 'of feed mechanisms-allotted Eil'ClitO one ofsaid=moi7able-tran'smishers having each a plurality of transmission points, a'plurality'ot feed niechanisms ah lotted each to one of-said movabletransinis; sion members for i'i'ioving'the latterKs tep-by step, a plurality of control members having each a roW'ot teeth and arranged e'ach't'o (idlitrol one of said feed mechanisms, the rows of 1110 the teeth of which control members differ from one anotherin the ni'imber of teeth in the row. 1

'9. I-l-l' coding or decoc'ling'ap ara'tu's'oftlie "character de'scmbcd, the com ination of a 12. Incodi-ng or decoding apparatus oft-he character. described, t-b'ecombination of] code-changing device comprising aplurality of movable code-changing transmission meni'k 13. In coding or decoding apparatus of the character described, the combination-0f a movable transmission member "of a codechanging device, a control member operable finesnes m1 t-omsutic.me ans comprising mplurality of code-elmnging CO-l 1;t'IQl. .l11elIlbe1 S operatively allotted each .to one'o-f siid coupling hills mission members and adapted tofbe moved 5 step-by-step the operation of one set of keysnnd.thereby moveleach its allotted-trans 'mission'men'iber. v

20.- Incoding orxdeeoding apparatus of the character described, the-corhbinationof l with a-seoond set onanopposite fafce least.

one of which terminal members is in the form .ofs. disc rotatable in relation to its adjacent coupling tr'z-insm'ission -an'embe;r, and means for holdingt-he rotatable terinirml niemher in various angular positions of adjustment, operative means pnssinglthrough said code changing device by way of said. transmis sion EPOlDt'S. and connecti the keys in pairs. -o.ne. of one-seit'o' on'e. oft-he other-set, which transmission Lpoin-t's on: one j f-ace of one transmission member; are arranged to register i simnltsneously wit-lithose *on an opposed face ofi-an adjacent transmission member and are so space-d the (when one -triinsmiss ion member is'stepped one'spspee reletively'to'another-each'trzinsmission"point lof ione member will he advzincedv-toqthe--pi1eedingone of: an adjacent member so that, thepairs of; keys will be change-(L and autonmtic':mezins'comprisinga. plurnlity of-codeschanging control members operzitivelyf-z llotted each .-one of said coupling -t-r a-nsir-iissi-on 1' members and adapted lobe-moved .step-by-step 'by the. op.-

erationfof one set of koysand therebymove (d-Cl its allot-ted t ra nsm; ssi'on member;

21. In eoclin-g or decoding apparatus. of

be-character described t-he coinbinzition of a.- setof character-producing sign-keys, a; second-set of sign-keys which ispit duplicate of the first, =11 code-changing device comprisin; 1 ---.1novnble. code chaneing transmission member: oneragt" eodei-chzininysfl device ,and connecting said 1 lie-rs in pairs, one-Lofone"set to. 0n e ott-he Co, her get, a si pport adz -ptedltg bevmoyod step I "by-step bv the ope-ratio .0f:-0ne;of sa-1d sets of l e. x;s.; 5nd. codeicha g'ing control. mam;

.v readilyv removable therefrom; and arrangedto sstnzite said movable transmission .inerfnhei:

22.- ln eo clin or.ldecoding appz ratus 0f the charde t-erv deso ribed the. combination of a setof chi iraeter-producing sign-keys; a

,setofchowder-producing sign-keys, asece. means: controlled by said v -21 il second set :ofsigmkys which is-zadupl-icste of the first, :a .eode-ohangin device comprising a movable code-changing transmission member, operative means controlled bysaid code-changing device-and connecting said :ke; in pairs, one elfone set to. one/of, the ofi'lker sehn supportad'ztpted .to be moved soep-by-"step by 't-he'opera-tion of one of ElllCl sets of keys; member rot-ata blymo inteid on said supper and arranged to actuate Sll iCl. "movable tr21 ission memben' 23.. In coding or decoding ia 'pparotiis. of the character described,"thecombinationof 3.-' 'S0 i3.

of cl'iari'cter-p rodi cing' signrke'ys, (second set of signkeyswh chns ia- (l-upl1eate-;othe' and a code-'eliangin control -first a code-chan in qdevice com' r-isin b D plurality of movable codex-hanging trensmission members, operative niean'scontrolled by smdIcode-clmngmg device and-connchmg said keys in pairs; one of one set tQoneoftlie.

other set, a support iidapted to be nioved'st oi keys, ands-plurality o-f'cod-clmnglng control members mounted on said support and arranged'e'ach to actuate oneof said movable transmission members.

24. In codir-ig or decoding apparatus-of the characterdescribed, the-combination of-a set,

of character-producing v sign-keys, gr second 1 set of sign-keys which a-dufilicitte-of the first, a code-changing device'eompris'in gfn. p111 rality of movable code-changing stronsmis 1' 'sion members, operetivemeans" eontrolled by said -cod e;changing 'devii'c-e and conn'ecting said keys in pairs,'one ofonefset to one-ofltho other set, and a, plurality-of code-changing control-members-exceeding thenumber of said I movable transmission members, which con.-

trol membersare-adopted'to be moved stop-- lay-step by. the operation o f-one of saide (if-keys and are arranged to-be' so moved bodiljv .into and out of operative driving 1 613:

tion' with sn-id moy ehle transmissionmembers .s t o place the saidmo vable transmission members as to place the swid inoyztble trans-- mission members in association each-With a different control m'cmberby their bodily:

said codeielm-nging ;,deyice and fjco'nnectin'g saidkeys impairs, onezofl'oneset toonefofthe" other set, a. plurality of- :I' eed mecl1a'1 sms'ihav:

to one'of soid movable transmission members;

and a plurality of co'de-changi ng f control members each in the form-of 2r toothed barfor eo-operating'w'ith thepav fsaid feed meshanisms and exceeding inniiinber theinumlier

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