US2461451A - Signal-controlled printing apparatus - Google Patents

Description

Feb. 8,1949. H, l.. 'rl-loLs'rRuP SIGNAL-CONTROLLED PRINTING APPARATUS '7 sheets-sheet 2 Filed April 19, 1945 INVENTOR -ATTORNEY Feb. 8, 1949. H. L. THoLsTRUP y 2,451,451

SIGNAL'JCONTROLLED PRINTING APPARATUS Filed April 19, 1945 'II sheets-sheet 5 $4 sa 94 s ATTORNEY Feb. 8, 1949. l V H. L. THcbLsu'r'RUl?v 2,461,451

sI'GNAL-cQN'TRoLLED PRINTING APPARATUS l l l Filed April 1.9,.1945 v `'r sheets-sheet 4 `TTORNEY mmm /f 2m Sm mqw n @www EN www,

INVENTOR Feb. 8, 1949. H. L. THoLsTRUP I SIQNAL-CONTROLLD PRINTING APPARATUS 7 Sheets-Sheet 5 Filed April 19, 1945 hwm ATToNEY A Feb. 8, 1949.

H. L. THoLsTRUP SIGNAL-CONTROLLED PRINTING APPARATUS Filed April 19, 1945 INVENTOR @xm uATT`o|=u-4EY Al-f Feb. 8, 1949. I H. r THoLsTRUPl n 2,461,451

SIGNAL-CONTROLLED PRINTING APPARATUS Filed April 19, 1945 y v sheets-sheet 'r 224 ATT RNr-:Y

Patented Feb. s, 1949 2,461,451

SIGNALCONTROLLED PRINTING: ,1:

APPARATUS.

HenrykTholstrupRochester; N. Y.,'as vsignoreto I International-Business Machines Corporation, y NeworkvN; Y., a? corporation of Neworlt-f AppiieationsApril-il 1945, SterialfNo.589,112ma 3 ClainS'.""(Cl. 197i-`20)""" Thilinventionrelates-lgenerallyto signalfconna. Whiehfisiof,fimmovedconstxinction and arrangee trolledlprinting.apparatus such, folfexarripla.as a. typeWriter.- which i'sautomatically. operated un'der.;..

the .control of ,dataerepresentingdesignations j;

whichliavelbeen eprevionslylecorded in. a record,

sheetfeor tape, according..to a predetermined f 1j codels'ystem.; the. present application lbenga Jcon-1 tinuation in part ,of my copending' .Eatent No.1'. 2,375,371; vgranted.Jiin'etl2,194:5; in applizlzation,`

Seri'aLNo..492,896;;filed'Jun`e30,.1943.112 10 Writerfin its normal adjusted casei positionnwill Whlethe"signalacntrolledprinting.apparatus" ,t cansa,theN'piirit ing, of ajcharacter correspondingAy p of tl'iepresentirivention'may be constructed in' a to suchveodesgnaLand which; when .thesame varietyeof Waysit Willbe noted vthat the -emloodi-i' code signalds prodncedyzith thetypeWriter admentvrdisclosed. herein is the same in many rejustevdmto its shifted ,casepositiom yyillprevent spectsas that disclosed: in my saidA copending furtheltlrdllcingof ode signals and will there patenti. 'As "'willappear more .fully"`liereinafte1"; by 'stop theoperationj of the apparatus@ the 'disclosed embodiment comprises generally a Otherwobjectsof tha-invention*will-be 'pointed tape-'residen' an electrical translator, and a'typi out in thefollowing description and claims and writer. The'ireader operates'cyclically'anddure illustrated intheaccompanying drawings-whicli K- ing' each cycle sensesmacode `disignation in thefi disclosarbywaypf yexample@the.principle-'of thel record tape and as a part of'thesensing operation invention and the lbest modefwhiellhas' been com produces a signal signifying the designationY templatgeiof applying tlflatprinciple. sensed. LIhe'relectricaltranslator'is adjusted in In thedrawingsg 1, l Y response to the'sensing cf each :code vdesignation Figi-1 is a plan-gview-fshowing ,generally-:the

to 'provide 'a circuit kflow pathcorresponding to L each such sensed code designation andto' the `sigf` g;

nal produced' thereby. The typewriter comprises the""usual'typebars carrying 'character type-elefments'of different caseor class, a platen for hold ing'the copy; sheet on vrwhich Nthe data is tp be cally responsive actuator'- Vfor effecting a; printing operationof eachof the type'barsandan electrifg Fig; 4 is a fragmentary vertical-sectiona f cally:responsiveeactuator'foreectngeeachof the e View taken on the--lin'e 4-'4 of Fig. 2, and -1111S functional"operationsof tha-typewriter;suchas trai-,ing the4 tape feeding mechanism; case shift-,"sliift release,isrzaeabackspace,tabu Figw is a' Afragmentary `v`vertical section-- latingand carriage "return: Whenairecord; tapeY 4o thronglrthe;readergthe section beingtaken at is prepared.,` code designationsirepresenting'these'f right'l angles ltoflf"igs .--3 and'f' and beingindi-r functional-operations are-recordedfthereinalongf-m catedf'lbyjthe line -5-5 0f -}."'g.`^2; i Y witlithe* character -code-:designations-f'4 Whjenfa Fig 6 `is a, fragmentaryvertical--sectional codefdes'ignationis Asensed-and the-circuitfloW-fview-atakenntheqine .5 6 of F1g 2, and 111115-- path corresponding thereto is established byi'the* 45 t1-ating theclutchmechanism-and `its"colfltrollingV tfansat 'the 'C10Sl1g""9f Che Circuiti-:including s, magnet; Whichiunctionto connect=thcreader opsuch"^path energizes` tine;` related -actuator'fto grating-Shaftwithlahsourcefof power;v operate the typewriter-"in aecordancewwiththe f* Figs" is ajra'gmentary vertical-section takenon l designation sensed; e., if the' designation vsensedv tlielineg-fl-TI of Fig andshowingthe codesens represents" 'a' Characterrthe"typewriter Will-print 5o ingfpinsof the-reader--andrthefmannelf in `which sucircnaracte1',fo1', if the*sensed-designation rep each pin controlsfitsfrelated sensing contacts; lesents 'a 'functional--operation,-swchoperation Fig; 3" is a transvrse .vertical vsegg-,mmm view-- will beeffected:M through the centerof lthe typewriter;` the: section It is a-general objectv of the-presenft'invcnticnto fr beingtakenen 'theeline--S-' of Figi" 1; Prov-ideSigfilfcontrolledrfzprinting. apparatus-15x55 Fier-2 9 is -a fragmentary.vertical sectional-a ment. of p artscand -,Whie,n includes as one g f eature` thereof aprovision. foriautomatcally stopping the.'

Operationoitheapparatusin response@ the producfingaof ajsignificantccdesignal.

A furtherf.andamoreqspecificjolgjectl of the presentminventionisto provideganew and improved signaleontrolled*printing apparatus which, when a certain code signalisj produced With 'the'type-r units composingonepreierred embodiment of the;

present invention; A

more completely; 'f

Fig?? is `a fragmentary r-verticalu-seciona1 Y View taken on the line -32-3 of Eig: 2;

3 view through the typewriter in a plane parallel to andspaced from the planeof Fig. 8, and illustrating the mechanism fr effecting case shifting operations; K t

Fig. l() is a fragmentary plan view of elements of the typewriter keyboardand showing the case shift and shift-release keys and the manner in which they are operated;

Fig. 11.is a fragmentary vertical sectional view showing the shift-lock lrey, the section being taken on the line II--II of Fig. 9;

Figs. 12d and 12b are two parts of an electrical wiring diagram illustrating diagrammatically the various control instrumentalities of the apparatus and the circuit wires connecting themand Fig 13 is a View showing a portion of a. record tape bearing all of the code hole designations of a pre-selected combinational hole code system.

Before considering in detail the construction and operation of the illustrated embodiment of the invention, it will be helpful to consider rst one practical example of a pre-selected combinational code by means of which intelligence, such for example, as a letter which it is desired to transcribe, can be recorded on a record strip or tape. In Fig. 13, a, portion of a record tape I8 is shown, and punched in the tape are all of the code hole designations of a. combinatioinal six-hole code. The six code positions are indicated at both ends of the tape IIJ by the reference numerals I to 6, inclusive. Each code designation is arranged in a, vertical column or recording field, and opposite the several fields bearing the code designations and below the lower edge of the tape,

are placed legends indicating, respectively, the characters or functional operations represented by the code designations in the fields. From a study of Fig. 13, it will be noted that most of the character code designations are indicated as representing two different characters, the character legends appearing therein in two transverse parallel rows extending lengthwise of the tape. The reason for the latter is that in the code system illustrated the Shift and Releasef code designations are used in conjunction with the character code designations to represent the different characters. The legends in the bottom transverse row may be properly referred to as "normal or letters case characters and those in the upper row adjacent the lower edge of the tape as "shifted or figures case characters. As will appear more fully hereinafter, the sensing of the Shift designation adjusts the typewriter to its shifted case position and, with one exception hereinafter explained, the subsequent sensing of the character code designations in the tape will result in the printing of the corresponding shifted case characters. Also, .the sensing of the Release designation adjusts the typewriter to its normal case position and the subsequent sensing of the character code designations will result in the printing of the` corresponding normal case characters.

The exception just noted is that with the typewriter in its shifted case position and upon the subsequent sensing of the designation having a code hole in the number 3 and number 5 code positions, the operation of the apparatus will be stopped, and with the typewriter in normal case position, the sensing of the saine 3--5 code designation will print the letter character H. The latter is an important feature of the present invention and will be explained more fully hereinafter. Also, the sensing of the 1-4-5-6 designa- 4 non indicatedby the legend smi-r' win provide for stopping the operation of the apparatus iii a new and improved manner', It is noted that the sensing of any of the designations representing' the typewriter operating functins', r that the sensing of the i-i-Li-f-e oesig nation` indicated by the legend steph wiu result in effecting' die corresponding operation wtili the typewriter i'ri either of its adjusted case positions.

In Fig. 13, the smaller holes Il at the center off the tape I 0 and within each of the several recording fields are for the purpose of feeding the tape lengthwise during the reading o`r sensing opera-'- tion. The *cod vhole',designations and the feed holes I I may be punched inthe tape by aiiy suit-l able form of code perforator (not shown herein);

Referring now in detail to the construction of the preferred embodiment disclosed iii the draw-i ings, it will be noted that the signal-controlled printing apparatus is shown in Fig. 1 as corri prising generally a tape reader I0!! enclosed within a suitable housing |2, and a power operated typewriter Zil. As will appear more fully hereinafter, the apparatus also includes an electrical relay translator of the pyramid type, and certain mechanisms, devices, circuits. and other control instrumentalities which provide for the automatic operation of the typewriter under control of the code designations in the record tape Il) sensed by the reader. The translator and these other control devices, instrumentalities, etc., and their connecting circuit wires are shown diagrammatically in Figs. 12a, and 12b. As will appear more fully hereinafter, these control instrumentalities are suitably mounted within the reader housing I2 and on and under the typewriter 200. The circuit wires connecting the control instrumentalities mounted in the reader IBD with those mounted on the typewriter 28S are suitably enclosed within a cable RT shown in Fig. l.

As viewed in Fig. 1 the reader is provided across its lower side with a platform or tape table I3 across which the record tape I0 bearing the recorded intelligence is fed step-by-step during the operation of the apparatus. A tape supply spool l5 is suitably mounted at the right-hand side of the table I3 and serves to support the record tape I0 to be read and transcribed. A second or tape storage spool i B is provided at the left of the table I3; and, as will later appear, is rotated by a flexible belt I1 during operation of the apparatus, for the purpose of winding the tape thereon after it leaves the sensing station of the reader. The sensing station is indicated at 20 and, as will appear more fully hereinafter, the recording fields of the tape are successively sensed during successive operating cycles, by sensing elements located at the station 2l). A removable gate 2| is provided at the sensing station for properly positioning and holding the tape with yrespect to the sensing elements. The tape I0 is guided in its movement toward the sensing station by a. suitable guide member 22 xed to the top of the tape table I3.

At the right-hand side of the reader |00 ,as viewed in Fig. 1, are provided three electrical switches indicated, respectively, at 24, 25, and 2t. As will appear more fully hereinafter, the

switch 24 is the power switch and when closed... connects a convenient source of alternating current with a motor for driving the reader unit and with a motor for operating the typewriter. The reader motor is indicated by the character RM in Figs. 2 and 12d, and the typewriter motor by TM in Fig. 12b. The switch 25 ls the start 5 switch and when closed, starts the sensing and feeding of the tape and the automatically controlled operation of the typewriter key members. The switch 26 is the stop switch and when closed instantly stops the feeding and sensing of the tape and the controlled operation of the typewriter.

The typewriter 200 which is shown in plan in Fig. '1 and rthe detail construction thereof in Figs. 8 to 11, inclusive, will be recognized as being a well known commercial form of powerdriven typewriter and -Will be described more fully hereinafter. In Fig. l, the typewriter is shown as comprising a keyboard 2|!) including the required complement of character keys 2|| which operate corresponding type bars 2|2, and the functional keys which include the shift key 2|3, shift lock key 2|4, shift release key, 2|5, the carriage return key 2|6, the back space key 2| 1, and the tabulating key 2|8. The space bar is indicated at 223. The typewriter 200 also comprises the conventional rotatable platen 2|9 mounted on the typewriter carriage 220 and which supports a copy sheet indicated at 22| and on which the data recorded in the tape I0 is automatically typed.

- At the lower and left-hand side of the typewriter' as viewed in Fig. l, is provided a power switch 224 whichfwhen closed, like the power switch 24, connects a source of alternating current with the typewriter and reader motors. At the lower and right-hand side of the typewriter is mounted a start switch 225 and a stop switch 226 which function, respectively, the same as the switches 25 and 26 on the reader |00. Thus,

the operation, of the apparatus may be controlled from either the typewriter or from the reader. An insert switch 221 is also provided on the typewriter which, when open, prevents starting of the tape feeding and sensing mechanisms in the reader |03 and thereby eliminates control by the latter of the typewriter, so that the keys of the typewriter keyboard 2|0 can be operated manually without interference from the reader. The insert switch 221 will normally be closed, and will be opened when it is desired to type manually an insert in the data being transcribed; for example, when it is desired to type manually the name and address of the'person to whom the transcribed copy is to be sent or any other data which will be of interest only to the recipient of the copy.

The detail construction of the reader is shown in Figs. 2 to 7, inclusive. The reader comprises the reader motor RM which is suitably mounted within the housing I2 and which operates continuously as long as either the power switch 24 or power switch 224 is closed. The motor is at all times operatively connected by a suitable flexible drive belt 30 with a power shaft 3|, the latter being mounted for rotation within Suitable bearings 32 mounted within a frame 33 which is bolted to the base 34 of the reader.

The reader |30 also comprises an operating shaft 35 which is aligned with the power shaft 3| and is supported for rotation within suitable bearings 35 carriedA by the reader frame 33. The shaft 35 will be referred to hereinafter as the reader shaft. A clutch 31, under the control of a clutch magnet CM, is operable to connect and disconnect the reader shaft 35 and the power shaft 3|. The reader shaft effectsthe operation of the tape feeding and sensing means.

A. cycle of operation -of the apparatusr is effected during each revolution of the shaft 35:

viz., the tape I0 is fed or spaced a distance suf.- cient to bring the next recording field of the tape into sensing position, such next Yfield, is sensed to determine the code designations therein, if any, andthe typewriter lis operated in response to the sensing 4of the code designation.

As lon-g as the shafts 3| and 35 areclutched together the cycles of operation are `repeated and the typewriter continues to transcribe the data recorded in the tape being read.

In so far as the present invention is con' cerned, any suitable form 'of clutch may be used to connect the reader shaft 35 to the continuously operated power shaft. The clutch 31 whichis shown, is well known to those skilled in this art, it being substantially the same as that dise closed in the U; S. Patent No. 2,206,646, granted July 2, 1940. If desired, referencemay be had to said patent for a complete showing of the struc# tural details thereof, For the purposes of the present disclosure, it is believed sufficient to say that the clutch comprises a driving element in the form of a toothed wheel 4|) fixed to the end of the power shaft 3|, and a driven element in the form of a barrel-4| xed to the reader shaft 35 and carrying a radially slidable clutch pawl 42. The barrel 4| is formed with a diametrically disposed slot 43 within which the pawl 42 is slidably mounted. To the outer end of the pawl 42A is fixed a tooth element 44 which, when the pawl 42 is moved radially inward, engages the toothed wheel 43 to provide the driving connection between the shafts v3| and `35. The pawl 42 is biased in a clutch engaging'direction by a suitable spring mounted within theA clutch barrel`4l. rA clutch releasing lever 45 also Vex tends diametrically across the clutch barrel and at right angles to the slot 43 and is Vmounted for limited angular movement therein. The" lever is provided with an outer extension 46 which, when intercepted and engaged by the outer end of' one arm 41 of av rocking lever 48, is moved to move the clutch pawl 42 radially outward against the force of the aforementioned spring in the barrel 4| to disengage the clutch.

1 The clutch parts are shown in Figs. 2, 5, and 6 in their declutched position which is the home or starting position of the reader. The rocking lever 48 is mounted on'a stud 50 carried by a part of the frame 33 and includes a second arm 5| which carries at its outer end the armature52 of the clutch magnet CM. When the clutch magnet CM is energized, the lever 48 is rocked counterclockwise, as viewed in Fig. 6, which moves'the outer end ofthe arm 41 upward and thereby releases the outer extension 46 of the releasing lever 45, and the clutch spring within the clutch `barrel 4| then moves the pawl 42 radially inward to engage the toothedl wheel 40 in the manner explained above. When the clutch magnet CM is deenergized'a tension spring 53 rocks theilever 448 clockwise and. moves the outer end of the arm 41 into the path of the outer extension 43 of the lever so that the latter is engaged and moved to move the pawl outward to disengage the clutch.

In order to prevent rebound of the parts when the clutch is disengaged and in order to holdthe reader shaft 35 in the home position, the clutch` barrel 4| is also provided with an annularexten-i sion. or collar.. 54' having a notch 55 formed therein which, when the clutch is disengaged, receives the outer end of an arm 56 of a detent lever 51. The detent 1ever51 is also pivoted on thestud B0 and includes'anotherarm 58, which I' iscomreet'e'dl'totharmatui'enby meanssof the? tension springe previously mentioned., Thus; tlie'rspringls serves therdual purpose ofzurginge; thefarmr 5651 intofengag-ement with-the' periphery Ufthecol-la-rid' so thatzit will;v t within thei notchdiinhomeapositiom-.andito urge the-arm 47 intdfpositionftozintercept thefextensionlfof the pazwkreleasing levennand thereby declutch'lthe- As stated? oloovezduring` the rsty part of each revolutionzofi-thefreadershaft 35, thetape sfed onf spaced' lengtnwisef'tof loi-ing` a-r newrecordingA ieldi intosensing:v position. The tape'. feeding mechanismiisishown more clearly in Figs. Zand .4, andi comnrisesz-aalcam Eimounted on the reader shaftBz'fand cooperatingwith arocking' lever 6 l. plvotedeonf a .fixed stud-ftl carried by the' frame andfA comprising; a; pair of arms E3V and 64;.v 'lllxeffcanie i'il':v andv lever 61j are. shownA inv Fig.. 4; inthenstartingf or home position'andare so constructedrtliat when i ther camilill'V begins Ito: rotateY connterclockwise direction, it first engages the: arm 63 .to froekzthe .lever :Sii 1 count'erclockwisei aindthenl engages thez other; arnrI 64@ to rock the lvfer 614 clockwise:` and return the same` to` the posltiomshown; Alink 66 is: pivoted at its lower erfdtoth'e outer end; of arm lillE and. extends up'- wardlytherefrom-andis pivoted 'at its' upper`- end a-1Sti1d'EBTfto azsecond link 68; The link- 68- isalsnfpivoted'toai shaftA lll and ser-vesto hold the link: Gwin :its f uprigl'lifjposition` shown'.

Aflso pivotally conneoted-onlthe-stud 61 is a feed pawl Tir-which i's'held inoperative engagerinenttwith:aratchetwheel- 'IZ'Xed to theshaft 'me by. meansi ofA a tensionspringY 13.*connecting outerc extending; armso the? pawlf H andthe link: Sil:V A detent kisffpivotally. supported by; a fixed; stud 15 andis' held; in engagement.with` tlreteethr of the 'ratchet wheel? `l2: by means of a. tension'ispring'll andi thereby 'serves to prevent' reverse movement? of; the: ratchet'Y wheel' 'l2fand sliaft. 1U. From the above; it isapparent that when.- the'` clutch tl'is` engaged tol rotate the. reddenshaft l and when the lever' 5:! is: first rooledf c'ounterolockwise by: the :cam lit?, the pawll 11i will" be moved' downwardly thereloyfandk will rotate tli'e ratchet" '12"an'd shaft lcounterclocke wise: and?. whenl the cam 60 r`rocks the`- lever: 6l clockwise; the-pawl 'H will be moved upward'to engage thefneXt-toothsof the ratchet'lZ..

The shaft 'li's'the' tape' feed shaft and is provided 4fw'ith'ra feed wheel'` .11 having radially ex; tendin'gfpins 'IB-'which are; adapted tol engagethe holes Hf in'l theftap'e I3. Thus,- when.' the feedfshaft is partially rotated irr the. manner' just described; the tape'isf" fed to` the left' as viewed irrFigs: `11and:2', a distance equal to the widthof arrecording field. The belt Ii'l which rotates` the. spool I6 shown in: Fig..1, isr driven pulleyl T9 xed'totheztape feed` shaft 10".

Titre?. mechanism` for: successively sensingj the reemning'elds. ofthe: taleeY comprises six-sensing pins indicated respectively, by the Acharacters Si 'toiSBglincllsivez There iszone pin; for" each othe: code'f hole` positions and the pins. are'- af:-z ranged in a single vertical planeextendin'gat right' angles'. to' the direction vof? movement` oftithe tape; andnso: that whezrthe:tapezcomesrto restat the? ends:A of, a feeding operation, the: upper: end on each: pini. will! be: directly beneath.. itsf corteisnonding; code holeipositi'on' ini the eldz of" the tage.' imposition toabe: sensed;y Theey pins areetgnidedior vertical movementi'withinaligned openingen: spaced( guide blocks. Sti and'` B 1;, re;-y spentivelyg; which; armsutahlyi xem-.tm theframe 33:1 Aligned pairs; oi; gilides onenilzlgsareev aalsmprovided. inf the table i3 'andiinfthe-gate 21| and? they` areJ aligned' with. corresponding;openingsy` in the guidablooksf so that during al. sensing* operation' each pin-1 can be'nmved.- upward; and? through-fthe; tapewhen there? is a holefin the' code position in the tape corresponding tofsuohf pim.l

Thesixl sensingpinsarek supported and operar tively connected, respectively, atitheir lower ends*-A to f six pairs of spring.: blade contacts indicated; respective'lmbythecharacters Gl lio-G6; inclusive.- Each: pairof:l the contacts comprises any upper: xedeblade 32 anda lower movablefspring,blade:l 83-which extends outwardly-beyondthe end .ofi its? relatedY fixedV bladegand. isY connected.` at.- its-r out'erend tothe lowerend ofA itsarelatedfsenslng pin: The construction issuchA that thespring; blades E8; constantly.A urgeA theirrespective a coney tacts upward" into= closed position` andI their reelated sensing pins upward as viewed'inlii'gsf 3.-V and 7; Between,sensingperationsg thersiX sens'.4` ing; pins are. held in: homeepositiom the position shown: inFig. 3, by'theouter lateral: edgellio Vanet; whichzedge: extends across all. oa the1 pins and within transverselyv aligned notches-$6- provided;4 respectively; in. the sides off the pins. Thevane.- 85de, in effect, a; rocker arm pivotallw supportedl on a rod 81 carried by vthe-,fran'ief 3-3r and;V constantly urgedY tomove.- in;l a clockwise: direction, as viewed irsFig. 3..byaatensionspring; SR2", Thevane 35 is provided at' its centennwitlr zii-depending:- arm which carries attitsglower; endaroller QE-held .by the spring 818 in contact witlil the'face -c-fa: cam 9 l mounted .onfthe readers: shaft 35. When the: roller 96 is inengagement with; the high point. of'the Cam 9i, the. vane? 85 is: heldV ini the position shown Fig; 3 where the.' severalV sensing-` pins are held: in` theirfref-v spectivelower positions and th'eipars of-.contactsl controlled thereby arewheld open.. After the: tapehasceen: spaced bythe' feeding' mechanism inv the.A manner previously described andhas come torest with the new recordingreld above-.the sensingY pins, the shaft 35' and-foam' 9i Will have rotated' countercloclwise. fromf the positionshown in Fig; 3;. 94o of' a. revolutiom Whenthe shaft 35 has rotatedll therollerfSl) will' begin to :move inwardly from. the hieldY point onthetcam'Sl, andthe vane; Br-will moveinfa clockwisedirection due to the force ofthe spring S8. The sensing pinsSl to Stiginclusive, will also follow-the end S4 of the' vane- 85 upward due: to thefspring'orcein their respective :movable blades 83. Ifl there be` av hole inthe code'positioneof the. tape immediately abovey a: sensing pine. its movable spring blade. 831 willcontinue to move thefpinupward and through such code hole and toa' point where thee pair of contacte: controlled therebyv will close. If'therebe, no codeholef in thefposition above. alsensing pin, the upperend of snchpinwlll strike. thotapey Ill-and will; be held therebyagainst further upward', movement. andin the latterzpositionits related. pair of `contacts are; held open. A By tva-3yrI of' example, Fig: '7 shows the'.l relative position4 of the parts during thesensing, of: arece ord eld'loearing the 1 3-5- codef designation; whichv as shown-.in Fig. 13' represents the normal case.r letter character Yi and` -thet shifter case ligure. character. "6. Sensing; pins SL, S3, and Siareshown asl having nassed thronghicodeiholes' in the; correspondingcode positions; 1'L 3: andj rin the tape: mandtheir relatedicontaotsfigi, Vand GE" are shown closed; The s ensingl pins-dL aporten i9 and 'S6 :have been. stopped k:in 1 their '.upwardfmove.- ment by the tape and their relatedcontactsfCZ, Eiland Ct are thereby held open.

.From the foregoing, itis apparent that during asensi-ng .or reading ...operation the .contacts Cl tofCli, inclusivaiare closed by theirirelated :sensing .singly y,or in .combinati-on, depending .upon .the :codehole `designation :the record .eld of .the .tape being sensed. 'Thesensingfoperation is rterminated by rthe thigh point of the camSl fenlgaging the .rollertll .on the ,arm 8.9 and moving' the vane 85 counterclcckwise, as viewedfimlig. 3, .sothat the end 84 thereof eng-ages vagain theY lower ends of the notches .8.6 in the several .sensingpins Si -toSt inclusive, .thereby moves the latter downward to .theposition .shown .inFig t3, vwhere @the related contacts .are held in fopen posi-tion. The Sensing operation `is completedand Ithe-vane 5115 :restored tollome position .at approxi-mately f3f16fof each revolution.

.In vorder to provide for automatically stopping the reading or sensing-operation .when there *.i-s 'no tapeat the .sensing station, a seventh pin 94 :is mounted for Ivertical sliding movementwithin aligned openings in .the spaced ,guide blocks 8|! and 8| and in the table i3 andthe gate 2| and is positioned so that it Vwill engage the central portions of 4the tape. Thelower end of the pin p94 Zis supported and operatively-connected to the movable spring lblade 95 carrying 1one of ,a pair woi contacts S. The blade 95 is normally urged upward by the `spring--folrce inherent therein, uto open the contacts .S ,andimove the ypin .84 upward. 1f there is a tape at thesensingstaticn l2il,1the ,upper end of the pin .9d 'engages the underside vof the tape and the contacts AVdii are held closed. This is lthe position of the parts shown in Fig. 7. -When lthe tape runs out, the `pin :B4 `moves .upward and opens the contacts 96 which, as will later appear, opens the energizing circuit for the .clutch niagnetCM and thereby stops the feeding vand sensing operation of the reader. In Fig. 3, no tape is shown at .the sensing position 2li and the-pin Agli is shown in .the upper .position where the `contacts .9,5 are open. The lpin lil is made .suillciently large in diameter vso that 4the :feed holes il in the` tape lil will not affectits operation.

.Each .sensing or reading operation produces a significant signal corresponding .to .the designa- .tion sensed. As will be-explained morefully hereinafter in connection with the description uof the .wiring diagram shown in Figs. 12a Vand 12b, the sensi-ng contacts Cl to Cd, inclusive, control, respectively the flow of .direct current within six Signal circuits, .the latter including, respectively, .six translator relays M| .to M6, inclusive, of Va relaytype of translator mechanismfwhich, :as stated, is diagrammatically shown in Fig. 12a. .At this point, it issulcient to say that by ener glzing translatorrelays Ml to M6, inclusive,.singly .and in combination, due to theseIectiVe closing -of .their .related contacts yCi to C6, inclusive, duringthe reading operation described above, a

number of controlling circuit paths through the ,translator are selectively established, which cir- .cuit paths correspond, respectively, -to 'the .code designation sensed. With certain exceptions hereinafter explained, each off lthesecircuit paths, when closed, actuates a related key member of the typewriter Zilli.

A cam |02 is also ilxed to the reader shaft ,35 Vand controls .through a pivoted follower |03 the Aoperation of a pair of spring blade contacts ,|il4. As will appear more fully hereinafterthc cox'i'tacts lili control therow of signal current .from a suitf able 5D. fC. .source .and through the contacts Cl 'toiCBirrclusivadn parallel, :to their related translator magnets -to M6, inclusive. 4vThe contacts -ililll .may be .termed .the D. C. .common contacts and are @normally :held 'open lby their movable :spring blade. The .cam lli2 is so shaped and'posi- .tioned on the .operatingshaft that the con- :tacts .flilzklare .closed 2.11142 of a revolution which is after the time for closing the sensing contacts 'Ci to .iCa'ir-lc'lusiue, .andareopened at 811" which 4is beto'resthe sensing '.conta'cts 'are opened yby the yanez. Y'The purpose of the D. C. common con- .taicts :is to @provide for ,simultaneously energizing andgdeenergizing-thetranslator relays Ml to M6,

inclusive. Y

vAncarn .|86 :is also fixed to the reader shaft 35 land controls through lajpivoted follower lil-'I the operation .of a pairfof normally open spring blade contacts |08 which are Yherein termed the A. C. com nion Acontacts. As Vwill .appear more fully hereinafter, A`the current which liows through the controlling ,circuit paths-,0f fthe translator pre- -viously mentioned as being vlcond:l-ti0n e ;1 by the selective energizationnof the translator relays MI to M6, inclusive, -A.IC. current, and the cam .me is Yso shaped thatiit connects rthe sourceof A. C. currentwith these circuit ypaths-.at a predetermined pointn eachcycle of operation. In .the structure shown, Vthe -cam effects the closing of the A. C. `confirmen contacts -lll at approxi- ,mately y170" ,of each revolution and opens the contacts at 294. f

The detail construction of theV typewriter is vwriter v.are .fully .disclosed V.in a number of U. S.

patents, among which is Patent No. 1,777,055, granted September-3Q, 1930, `which discloses Athe ,general'principles rof operation lof the vkey levers and how they control through related cam units, the .operation .of .the type @bars In view of the detailed descrip-tion of theconstruction .and operation of the parts given in the patent just mentioned, only a brief description will be given herein which will be sufficient to enable the present 'invention to ,be understood. Reference may be' had to the aforementioned patent .for further details.

As -shcwnin Fig. 8, the character'keys 2| |y are mounted, respectively, vron key levers 228, the latter being pivoted .on a rod 229 which is supwpoitcdlcy across frame 23|) rigidly mounted in the typewriter frame'fRotatably Vmounted in the -base 23| is the power roller 232 which is rotated in theV direction of the arrow by means of an l-Lf-C. motor,-n`ot shown in'Fig. 8, but indicated diagranunatically at TM in Fig. 12b.

Whenthe-machine is in usefthe power roller ro-V tates continually. Y

:Cooperating with thepower -roller 232 are Vthe .cam units-233 which are pivotally mounted on .rods 234extendingparallel with'the power roller E232. :There is `a @cam unit' 233 associatedV with .eachbf the'key levers 228, and -each of the cam units whichis `operated bya character key v2| I, is :connected by .ailink 235 with .a `sub-1ever 23B .pivotcd on rod.2-29. The sub-leversz23t are connectedibyjinks 2357 to type bars 2|2 through the .medium of toggles 238. The type A'bars 42|2 are Apivoted in the usual type ibar segment 239 and .the latter is provided with avtype guide .240 'located in front-of the platen 2| 9. statedpre-` viousiy, the platen is adapted to support the work sheet 22| and is rotatably mounted in the carriage 226, and the latter is supported for lengthwise movement on front and rear rails 24| and 242, respectively, by means of suitable antifriction roller trucks. Springs 243 connected to a curved spring anchoring member 244 and to toggles 238, provide means for locking the toggles in their normal or inactive position shown in Fig. 8.

When any character key 2|| is manually depressed, its related cam unit 233 is caused to operatively engage the power roller 232 in a well known way, thereby rocking the cam unit 233 clockwise or counterclockwise, according to whether the operative cam unit is pivoted on the left hand or right hand rod 234, respectively, as viewed in Fig. 8. The rocking of the cam unit 233 causes its link 235 to be drawn downwardly, thereby rocking the corresponding sub-lever 236 in a clockwise direction. This movement of the sub-lever 236, through the corresponding link 231 and toggle 238, causes the type bar 2I2 associated with the selected key to rock in a counterclockwise direction to effect the impression of the type upon the work sheet 22| wrapped around the platen 2|9. The type bar, near the end of its operating stroke, engages the usual universal bar 245 and causes the universal bar to move rearwardly and downwardly in Fig. 8 to space the carriage forward in a manner not disclosed in detail herein, but which is well known to those skilled in the art.

To each of the character key levers 228 is connected by a spring 246, an electrically responsive actuator in the form of a solenoid 241 which, when energized, pulls its related key lever 228 downward to operate the related cam unit 233 and type bar 2|2 in the same manner as described above when the related key 2|| is manually de- 'Y pressed. As will appear more fully hereinafter, the solenoids 241 are selectively energized by the A. C. controlling circuit ow paths previously mentioned as being selectively established by the energizing of the translator relays MI to M6, inelusive.

As will be readily understood by those skilled in the typewriter art, one of the cam units 233 is operated by manually depressing the space bar 223 and its related key lever, and such cam unit when operated effects the rearward movement of the universal bar 245 to space the carriage. The detail mechanism for effecting this operation has not been shown herein as it would be a needless duplication of drawing and description. A solenoid 241 is also provided for operating the key lever on which the space bar 223 is mounted.

The latter solenoid is shown dlagrammatically in Fig. 12b. Y

The type bar segment 239 ismounted in a frame 249 and both the segment and the frame form parts of the type basket. The type basket is movably mounted in the framework of the machine for case shifting movement in a well known way and normally occupies an elevated position shown in Figs. 8 and 9 for the typing of the normal case characters referred to hereinabove. In Figs. 1 and 8 only one of the type bars 2 I2 has been shown. The normal case type element on the bar 2| 2 is indicated at 2|2a and the shifted case type element at 2|2b. The case shifting mechanism for drawing the type basket downward to permit the printing of shifted case characters is described in U. S. Patent No.

1,945,091, granted January 30, 1934, and is partly shown in Fig. 9 hereof.

Secured, respectively, to the back of the type basket frame 249 and on opposite sides thereof, are two brackets 25D. The brackets 250 are connected by links 25| to the outer ends of lever arms 252, the latter being fixed respectively, on the ends of a. transverse shaft 253 journaled in the framework of the machine. Pivoted on a stud 254 at one side of the machine is a, lever 255 having two pins 256 and 251, engageable by the short arms of a T-shaped lever 258, the latter being pivotally mounted at 248 on one arm 269 of a three-armed lever 260. The lever 255 is connected by a link 26| to the outer portions of one of the lever arms 252 and at points spaced from the connection of such arm and its link 25|. The T-lever 258 has a stud 262 projecting into a slot formed in the rear end of an arm 263 comprising a rearward extension of the left-hand shift key lever 264 as viewed in Figs. 1 and 10. One arm of lever 260 is connected by a link 265 to a cam unit 266 which is controlled by the shift key lever 264 in substantially the same manner as cam units 233 are controlled by the key levers 228, described above.

The type basket is manually shifted downward to shifted case position when the shift key 2|3 mounted on key lever 264 is depressed and is .returned to normal case position when the key 2 3 is released and moves upward. The key lever 264 is, therefore, held in its lower position while writing shifted case characters. -v

When the shift key lever 264 is depressed, the T-levei` 258 is elevated to bring the upper of the short arms thereof to a position behind or to the left of the pin 256, this movement taking place before the cam unit 266 controlled by the key lever 264 is operatively connected to the power roller 232. When the cam unit 266 is operated, the link 265 is drawn downwardly, thereby rocking lever 26|) in a clockwise direction. This draws the T-lever 258 to the right as viewed in Fig. 9, and thereby, through the engagement of said T-lever with the pin 256, rocks the lever 255 clockwise. Consequently, through the link connection 26|, the lever arms 252 connected thereto and the transverse shaft 253 are rocked in a counterclockwise direction, thereby pulling downward the links 25| which results in the type basket being drawn downward to shifted case position.

As disclosed fully in the aforementioned U. S. Patent No. 1,945,097, when the key lever 264 is released so that it is returned upward to its normal case position by the spring 261, the cam unit 266 is again actuated by the power roller 232 so that the cam unit rocks in a counterclockwise direction, as before. When the key iever 264 is released and before the cam unit 266 lgs-actuated, the rearwardly extending arm 263 of the lever 264 moves downward andA thereby permits the T-lever 258 to move downward and bring the lower of its short arms to a position behind or to the left of the lower pin 251. Consequently, when the cam unit 266 is rocked counterclockwise, as `inst stated, the cam unit through the link 265 rocks the lever 260 clockwise, and the latter through the T-lever 258 and pin 251, rocks the lever 255 counterelockwise. The lever 255, through the link 26|, rocks the arms 252 and transverse shaft 253 clockwise to return, through the links 25|, the type basket to the normal case position shown in Figs. 8 and 9,

In' accordance with the present invention, a

I3 set of .transfer contacts 20.! .are adjusted to close one circuit path when the type basket occupies it'snonmal case position, .and are adjusted to open vsuch :one .circuit .path andv to close la different circuit path when the type basket is moved to its shifted .case position. As shown in Fig. 8 the transfer contacts 281| are suitably supported by the frame of the typewriter and comprise an upper 'iixed blade .or strap .202 carrying a contact point 283, a lower xed blade 284 carrying .a contact point 265, and a lcenter movable spring blade or vstrap ZUG carrying a contact 2ll1. The

blade i206 is biased to move upward 'to close points 2li?! :and 203. However, when 'the type basket :occupiesits normal case position, as'rshown in TFig. 8, the lower outer end oi an actuating arm 208 holds the center blade '28.6 downward against `the inherent spring force of the blade to iclose the points 2W and 2:35. 'The arin 288 isi'ixed to the .transverse shaft 253 4and is provided with :a contact -actuating roller `2li!) which engages Ythe center' :blade 296 as shown in Fig. 8, vwhen the type basket is in the normal case position. When the -type basket is adjusted to its shifted case position in the manner explained above, the `shaft 253 and arm 268 are moved counterclockwise and out of contact with the blade 2% and the latter moves upward by its inherent spring force -to close points 201 and 203 and disengage points 261 and "2013. As will appear more fully hereinafter, the transfer Vcontacts function as a part of the means for controlling the operation of the `reader and typewriter.

'During the controlled operation ofthe typef writer'by-the sensing mechanism andthe translat tor relays, the key 'lever 214 is pulled downward to shift the type basket to shifted case position bythe energizing ofa solenoid 268 having an armature 269 pivotally connected to a latohing lever 121i)y which is, in turn, connected at its upper end to `the. lever 264 by a stud 21|l xed within an opening inthe key lever 264 and projecting into a Vslot 2'l2 formed' in the latching lever 21). As will presently appear, the key lever 2.64 is locked down when itis shifted by the solenoid .268, and the key lever 264 is released to return `the type basket to normal case position by the energizing of .a vsecond solenoid 213 which pulls down the shift-release lever 274 at the right of the` typewriter (see Fig. l0). lThe solenoid 268 is en .ergized as `a .result Aof sensing the Shift code 4designationin the tape l@ and the solenoid 213 is energized as va result of sensing the "Release xcodedesig-nation (see Fig.. 13). When the typewriter is` .operated manually, the shift key 2I3 is depressed and released to adjust the type basket to its shifted and normal case poitions. The .manually operable shift lock key or button 2id cooperates with the key lever 264 and latching lever '.210 to lock the key lever 264 down in its shifted' case position when it is desired to type manually a ysubstantial number of shifted case characters. When the key lever 264 is looked down, it'may be manually released by depressing the shift-release key 2i5 and its associated key lever21`4.

The shift latching lever 210 is arranged on one side of the key lever 2614 and the shift-lockv button 214 on the opposite side thereof. The shiftlock' button Elli is provided with a vertical slot 225 alsoreceiving the stud 21! projecting from the lever. A detent 21E is fixed to a stationary 'portion 21.1 of the .typewriter frame and coop- 'erates Vwith the latching lever -210 in locking the key :lever y26M down :in shifted position. Withfthe parts .in their normal case position, as .shown iin Figs. .9.110, and 11, 'the .detent 216 engageszthe lowermost linner surface of the .lever 210. .A ten.- sion spring218 connects-the latch lever 210 with the .shift key .lever 264and servesl to hold fthe lever 215i) `in' this position, the .stud 211 extending from the :lever 264 occupying the lower` part-.of thev slot 2.12.v The shift lock .button 2l4 .is provided with a pin 219 which `extends over thelatchi-ng lever .210 and rengages the top ofthe latter.. .Withithe parts in :normal case position, the lever 2119 .supports the button 214 through the pin -21.9.andthe :stud 21| 'also .occupies the .lower part of the slot .21:5 in the button 2M.y The vbutton .215 isvalso provided with vspaced tabs .28.8 and 28|, engaging .respectively the upper and lower sides of the key lever 264, which :aid :in holding-,the Abutton. 2.!4 in an :upright position.

When the solenoid 268 is energized, the :latching lever v2lb l.is :pnl-'led'downward thereby until thetop :of the Vslot `212 :engages the stud 2112, after 4which 'the key lever 264 will also be pulled vdown to: aoituate the cani 'unit 268 to shift the type basket to shifted case. i When the latter happens, the detent .212s lwill have cleared ra .ledge portion i282 on .the lever 219 .and the spring T218., 'in con junction with the 'off-.center pivotal connection between'` th'earmature 269 and lever 2.113,y willmoye the 'lever 2li) r-to the right or counterclockwise as Y viewed .in Fig. .9, until the ledge 282 is under the fixed detent 218., thus locking the latch :lever '210 and key lever 2&4 down ini-its shifted position..

- When the button 2:!4 .is manually depressed, .it alsoA moves vthe latchin'g lever 21.9 downward, through the pin 21S, until thetopof the nslot 2712 engages the stud 2H :after which the lever 264 will beV moved downward with. the lever 210 ,a distance sulcient to actuate the - cam unit 2,66. When. Vthe latter occurs, .the detent will .have cleared the 4ledge portion 282 and the `spr-ing 218 will move tne'lever v21'!) -counterclo'ckwisa until .the ledge v232 .is under the detent 216, thus manually locking the latch lever 21B and the .key -lever .2.64 down in shifted position. y

As stated above, the key lever 2641s released Ato return .to :lower case position by energizing the solenoid 2:13 or by depressing the `shift-release key 2|5. y.-'lo this end,.a bail lever-2-8-4-isprovided which comprises a ,pair of end plates 285 and 28` connected by abail rod 281. The bail lever 284 ,is mounted for pivotal movement by studs 288 and 28.9 .extending outwardly from the plates 285 and 285. and journaled, respectively, within opposite sides .of the typewriter. frame. .A stud .290 .extends inwardly from .the end plate 286 and .within .al notch29l .formed in a downwardly extending .projection of key lever 214 on whichthe `key 12.15 is mounted. (see Fig 8). vA second stud 292 ex tends. inwardly .from the end :plate 285 and over the louter end '.293 .of .latching' lever 210. Thus, .when the lever 214 is moved down. by the energiz- 'ing oi .solenoid 213 or. by manually depressing the :key 225, .the bail lever is rocked about its pivotal wellknown to those skilled in` this art. Conse quently, a detail disclosure herein of the mechaf nisms for eecting these operating functions is considered unnecessary. They are disclosed fully inmy said copending patent, of which this application is a continuation in part, and in prior patents identified therein. For the purposes of disclosing the present invention, it is considered suiiicient to state that each of the keys 211, 21B, and 216 is mounted on a corresponding key lever similar to the levers 226 and 264, and when each key is depressed, it actuates -a corresponding cam unit which in turn operates the mechanism for effecting the functional operation corresponding to the depressed key. Also, a solenoid 241 is connectedto each of the key levers supporting the keys 211, 213, and 216 and when energized effects the' operation of the corresponding cam unit in the same manner as when the keys are manually depressed.

Referring now to the wiring diagram shown in Figs. 12a and 12b, it is noted that all of the control instrumentalities and circuit wires located within the reader 100 are shown diagrammatically in Fig. 12a, and this includes the relay translator mechanism previously referred to herein, and that al1 of the control instrumentalities and circuit wires mounted on. the typewriter are shown in Fig. 12b. For the purposes of simplicity, the circuit wires ofthe reader which are connected, respectively, by the individual wires withinthe cable RT (Fig. l) with corresponding circuit wires in the typewriter are shown as ter ininating at the right-hand margin of Fig. 12a. inlplug socket connections, designated, respectively, as R1 to R56, inclusive. The corresponding circuit wires in the typewriter terminate at the left-hand margin of Fig. 12b in' plug socket connections T1 to T56, inclusive. It is to be assumed that the plug sockets RI to R56 are connected, respectively, to the plug sockets T1 to T56, inclusive, by the individual cable wires.

As stated above, the relay translator mechanism comprises the series of relays M1 to M6, inclusive,

which, during each cycle of operation of the reader, are energized singly or in combination,

'as aresult of the producing of significant signals by the sensing of code hole designations in the record tape. The relay translator shown is a Well known mechanism which, in response to the selective energization of its relay magnets in the -manner just stated, sets up a number of controlling circuit paths corresponding, respectively, 'to the code designations sensed. The relays M1 to M6, inclusive, control, respectively, the operation of one or more related transfer contacts which "during each sensing cycle will be transferred, or

left at normal position, so that the contacts may be connected in combinational series to condition the just mentioned controlling circuit paths.

As shown, the armature of relay M1 operates a pair of contacts M1-l; the armature of relay M2 operatestwo pairs of contacts M2--I and M22;

'.the armature of relay M3 operates four pair of these various relay-controlled transfer contacts yare shown in their upper or normal position,

Awhich is the position they occupy when their related oper-ating relays are deenergized. When any contacts MG-I to M15-32, inclusive. In Fig. 12a,

16 translator relay is energized, all of its related contacts transfer to the lower position.

With the exception of plug socket connection T8, the plug socket connections T1 to T48, inclusive, are shown in Fig. 12b as connected, respectively, by individual circuit wires with the solenoids 241, 268, and 213 which actuate the character and functional key levers of the typewriter previously described. Plug socket T8 is shown as connected to the center strap 206 of the transfer contacts 201, and the lower strap 204 is shown as connected to the solenoid 241 for the I-I. key of the typewriter. The solenoids 241, 268, and 213 are shown in Fig. 12b in the same relative positions as their corresponding keys on the typewriter. Legends appear opposite the solenoids and indicate, respectively, the characters printed and the functional operations effected by the energizing of the solenoids. Where two character legends appear opposite a solenoid, the upper character is printed with the type basket in shifted case position and the lower character is printed with the type basket in normal case position. Where only one character legend is opposite a solenoid, such character is printed only when the type basket occupies its normal case position because the corresponding type bar carries only a normal case type element.

In Figs. 12a and 12b, all switches, solenoids, relays, contacts, and associated parts are shown inv the positions they normally occupy with no tape under the sensing gate 21 (Fig. 1) and with both power switches 24 and 224 in open position and with the type basket in its normal case position shown in Fig. 8. A source of alternating current is indicated in Fig. 12a by the lead wires 400 and 40|.

As stated previously, both the reader motor RM and the typewriter motor TM are operated when either the power switch 24 or the power switch 224 is in closed position. One side of the motor RM is permanently connected to the lead 400, and also one side of the motor TM is permanently connected to the lead 400 by a wire 402, plug socket connections R55 and T5S, wire 403, and wire 404. Upon closing of switch 24, the other side of the motor RM is connected thereby to the other supply lead 401 by a wire 400, and the other side of the motor TM is connected to the supply lead 401 by a wire 405, plug socket connections T and R50 and wire 409. The closure of the switch 24 also energizes a rectifier transformer 406, one side of the primary being permanently connected to the supply lead 400, and the other side being connected to the wire 408, and through the latter and switch 24 with the other supply wire 40|.

With one side of the motors RM and TM and transformer 405 being permanently connected to the lead 400 in the manner just explained, the closing of switch 224 also energizes the motors RM and TM and the transformer 406 as follows: from wire 401, wire 410, plug socket connections R and T55, wire 411, the switch 224, a wire 412, wire 413, and wire 405, to the other side of the motor TM; and through wire 405, plug socket connections T50 and R50, the wires 409 and 408, to

the other side of the motor RM and the other side of the primary of transformer 406.

With the transformer 406 energized in the manner just explained, alternating current is supplied to the input terminals of a rectifier 415. The positive and negative DC output terminals of rectifier 415 are connected, respectively, to a plus bus 416 and to a minus bus 411. The opposite sides of the coil of a reader relay 420 are permanently connected with the plus v bus 4| 6 `and the minus bus 4| 1, so that as long as the rectifier is supplied Withalternating current, 4the relayV 420 remains energized. When the relay 420 is thus energized, the armature 423thereof connects the minus bus 4|1 to each of wires 43|, 432, 433,434, 43-5, and 435, which are respectively connected to the return sides of the six translator relays MI to M6, inclusive. Y

With a record tape I5 properly positioned under the gate 2| in the reader |00, the contacts 96 are closed by the pin 94 and the apparatus is ready for successively reading and transcribing the code designations in the tape onto the record sheet 22| inthe typewriter 209. The tape sensing and feeding operation is started by depressing either the reader start switch 25 or-the-typewriter start switch 225. The reader start switch 25 is providedwith two pairs of spring bladecon- - tacts 440 and 44|,respectively, the contacts 440 being normally open andV being closed upondepressing the start switch 25, and the contacts 44| being normally closed, and being opened when the'start switch 25 isr depressed. The movable one of the normally open contacts 440 is connected by a wire 442 `with-the plu-s bus 4| 6. Thus, when contacts 44|] are closed by depressing switch 25, direct current will flow from the plus bus 4|6 through'the wire 442, contacts 446, a wire.443, plug socket connections R53 and T53, a wire 444. the normally closed insert switch 221, -a wire 445, plug socket connections T5| and R5I, a wire A446, normally-closed pick-up contacts 441- of a master' control relay 448, awire 449 to one side tacts 96,. and a wire 452to-,the minus bus 4I1. When the master control relay 448 is thus energized, the armature thereof moves to the right and thereby opensjthe'pick-up contacts 441 Vand closes a pair of holding contacts 453, the latter Abeing connecteddirectly to the plus bus Y4I6 by va wire 454. The contacts 441vand 453 are of the overlapping type, that is, the holding contacts '.453 make before the pick-up contacts 441 break. -With the holding .contacts 453 closed, direct cur- 'rent 'will `flowthrou'gh'the holding circuit for the main coil'450 which'is traced as follows: from the plus bus 4| 6', through `the wire 45,4, contacts 453, wire 449, to the coil 450; and, from the latter, through wire 45|', contacts. 96, and wire 452, to the 4minus bus 4|1.

Contacts 455 alsol close when master control relay 448 is energized'and they'thereby condition an energizing-circuit for the clutch magnet jCM. This conditioned clutch magnet control 'circuit is established when'the start switch contacts 44| are again closed by the operator releasing the'start switch 25.v The clutch magnet circuit is traced as follows: from the positive -bus '4| 6 through the plug socket connections R54 and T54, a wire 456, normally closed contacts 313- which are under the control of elements .for

effecting carriage return of the typewriter, a wire `458, normally cio-sed contacts 326 which are under the-control of elements for effecting vtabulat- .ing operations. of the typewriter andwill be ex- '.'plained hereinafter, a wire 459,'norr'nally closed contacts 456 of the typewriter start switch 225, "wire 46|, plug socket'connections T52 andV R52, wire 462, the now closed contacts 455 of the mas- .ter control relay 448, a wire 463, the now closed contacts 44| ofthe 'start switch 25,'y wire 464,

and wire 452 to the minus bus 4I1. The clutch magnet circuit just traced directly controls the operation of the reader in the manner previously explained; i. e. when the clutch magnet CM is energized by the closing of this circuit, the operating shaft 35 of the reader is connected by the clutch 31 to the power shaft 3| and the successive cyclic tape feeding and sensing operations will begin and will continue at a rate determined Yby the designed speed of the power shaft until the clutch magnet CM is deenergizerl by the opening of any of the now closed contacts in it-s control circuit.

`The typewriter ,start switch 225 is connected in parallel with the reader start switch 25, so that the operation of the apparatus may be started by depressing and releasing the switch 225 in the same manner as justdescribed in connection with the switch 25. As shown, the switch 225 is provided with two pairs of spring blade contacts which are the normally closed contacts 460 mentioned above, and a normally open pair of contacts 461. One contact of the pair of contacts 461 is permanently connected to the DC plus busl 4|6 through the wire 456 and plug socket conections T54 and R54. The other contact of the pair of contacts 461 is connected by a lwire '468 and a wire 469 with the normally closed insert'switch 221 which, as explained previously in connection with switch 25, is connected to the DC minus bus 4| 1 through the wire 445, plug socket connections T5| and R5| wire 446, pick-up contacts 441 of the master control relay 448, wire .449, 'coil 450, wire 45|, contacts 96, and wire 452.

Thus, with the apparatus at rest, by depressing the switch 225 to close its contacts 461, and open the contacts 460,. a flow path for direct current is established through the pick-up contacts 441 `and coil 450 of the master control relay 448, and

the latter, when energized, will close its holding contacts 453`and remain energized rbythe hold` ing circuit established thereby whichwas previously traced. As explained above, the contacts 455 are close-d by the energizing of` relay 448 and the clutch magnet circuit is conditioned thereby. When the start switch 225 is released, its contacts460 again close and the conditioned energizing circuit for the clutch magnet CMl 1s thereby established.

As described previously herein, when the reader shaft 35 commences to rotate, due to the energizing of the clutch magnet CM and the resulting engagement of clutch 31, the tape I9 is first spaced to move a record field into sensing position whichV is directly above the sensing pins Si to S6, inclusive, and then the field is sensed Y by the pins to determine the code hole designation therein. As an example let it be assumed that the record field being sensed bears Vthe code vthrough the code holes in the tape to close contacts C,|,C3, and C5, respectively. The contacts CI, C3, and C5 will close at approximately 130 ofthe revolution of shaft 35 to condition signal circuits connected in parallel, and will remain .closeduntil 325, and the D. C. common contacts |04 are closed by the cam |62 at 142 Ato establish such signal circuits and are opened again'a't 311.

`With the contacts CI C3, and C5 closed, and with encinas i9 `the l). E. common contacts |04 fclosed, the signal current will ow v'frein Vth'eD. C. posi-'tive tous 415 through :cam contacts 104, 'the contacts 'Cl, C3, 'and-C5 in parallel, `and through signal wires 411, '413,fand 415 to translator relay magnets VM3, and M5, respectively, and lfrom the latter through Wires jii3l, 433, and-435, respectively, thefclosed contacts of reader '1elay -'420, 5to the D. fC. minus lbus -2111, With the translator relay magnets Ml, M3, and M5 thus energized ley the producing of a signal corresponding 'to "the l-B- code designation, their respective relay 'contacts 'are transferred to their lower positions. As the .relays M2, M4, 'and M6 remain deenergized, their related Ktransfer contacts will remain in their normal upper positions.

With the transfer contacts of the translator 'in the position just-stated, and when the .cam |05 on the reader shaft 35 closes Athe A. C. 'common lcontacts 10B at 170 .of .theV revolution of shaft 35, alternating current wri-ll `ilow .through 'the controlling circuit 'flow path established by the translater contacts, 'to the solenoid 241 controlling 'the key lever 228 for 'the rionnal case letter Y and shifted case 'numeral '6 1on the typewriter, 'and thereby eiiec't the operation'oi the related type .par 2| 2 in the manner previously explained. Assuming the type .basket to `be 1in its normal -case position, the energizing ci the .solenoid 241 as just explained will result in the normal lease .character Y being vprinted .on the sheet 221. The :closed A. C. circuit path for .energizing the lsoleheid 241 is traceable as Vfollows: .rom'the A. C. V.suppy lead 45B, a `Wire 411, contacts 108 now closed, a -wire 1418, 'contacts Ml-.l in the lower position, a Wire '419, .contacts M2.2 in the `position shown, a wire 480, contacts M3--3 in 'the lower position, awii'e 481, contacts N14-6 in the position shown, a wire 452, contacts `M5i`l in Ythe lower position, a wire 483, contacts Mii-:422 in the position shown, a wire 484, the plug socket connections R32 and T32, a wir'e 485, solenoid 241 for actuating 'the type bai' carrying the normalcase character Y, 'a Vwire 486, and if the power switch 24 is closed, through the wires'lS and 495, plug socket comiectionsr T59 and R50, the Wire v400, switch 24 tothe A. C. supply 'wire 401. If instead, the switch 224 is closed, the cir-- cuit will include the wire M2, switch 224', Wire 4l I, plug sockets T55 and R55, and wire 401.

From the foregoing it will be understood that if the, clutch magnet CM remains energized, and the contacts '95 are closed by the tape l0 at the readingstatlon '20, the cycles of operation of the apparatus will be repeated at the designed speed of the shaft 3l. During each such cycle of operation, the tape will rst be spaced to bring the new recordeld into sensing position, and such record eld will then be sensedV to determine the code designation therein in the: manner previously described. When` the field sensed bears a character code designation, a. space. code designation, the Shift code designation or the Release ccdedesignation, the translator relays will be operated to provide a controlling circuit path through the related solenoids to actuate the related key lever in the same manner as just explained in connection with the sensing of the i-3-5 code designation.

As is disclosed fully in my said copending patent, when the code designation is sensed which writer requiring a longer-than-normal time for its completion, provision is made for stopping the cyclic sensing operation of the reader when such 'functional operations are 'being .'emacted' by 'the 'typewriter :and f'or vresuming `the 'sensing operatio-ns upon a completion of such iunctional 'operation 'Examples foi such 4'iuncti'o'nal operations requiring e. ionger-than-normal Ytime for their completion are fc'arria'geretm, ltabulating, A'and pack-space. From anexamination of JFig. 12h, .it 'will ipe noteilthat each .of thefkey .lever .actuating solenoids 241 for effecting these three `lastinentioned runctional operations sfcounect'ed to 'a reircuit wire 1191, and that Athe latter is fin 'turn connected 'through a Wire 492, 'plus `seclrfet `"connectionsifil 'and lRl!! and the'wire 4795 with one input tennina'iof s. rectiiier 4'93. The other input 'terminal ci fthe `rectifier 493 'iis connected by the 'wire 459 'and switch 24 with the A. C. supply wire '40 If. ri 'the switch 224 is closed instead vof 'switch '2l 'such other input tei-Animal of rectifier 4'9`3 is 'connected to supply wire 4m through plug 'sockets R50 Aand T50, wire 405, wire "413, wire 412, 'switch wire 1224, wirezlll l', "plug sockets 1155 andRs, and wire 4110.

Thus, when the code assignation corresponding 'to either the carriage i'z'tu'lfn, tabulating or back 'space operation sensed, and 'the 'translator ris adjusted thereby tofcontiition fa tcomsrollirig Acircuit through the solenoid .241 corresponding to 'the sensed "code designation, the closing of the A. G. common contacts T08 will verrersse such corresponding solenoid 241 and will connect fthe input 'terminals of recliner 4293 across 'the A. 'C'. supply line. :one D. output 'terminal of the rejetier 433 connecten 'by a wire 494, relay con tacts 495 and 'wire 496 with one side of a bucking con 4st or' relay mi, and' the 'other side of the coil 491 is connected with the other D. C. output terinilzfal of the rectifier. With the relay 448 energized, the contacts 455 are closed.. Consequently, the just 'described closing 'of A. C. coin'- mon contacts |08 will result in the energizing -of bucking 'coil 491. The coils 401 and. 450 are oppositely wound, and 'the coil 491 is 'of 'suiiici'ent strength to 'overcome the coil 450 'ad cause Yrelay 448 to drop 'out and 'thereby yopen its holding contacts 453. The 'omit-suits 495 also erop out and break the circuit through the'bucking coil 491. Theccntacts 455 'in tiiecll'xt'ch magnet circuit also open to deenergize the clutch magnet CM and thereby stop further sensing operation-s. The pick-,up contacts 441 close, btthe main coil 450 cannot be energized 'again until other normally open contacts in the .pick-up circuit are closed.

As; explained in. my said copending patent, the typewriter includes an element which Yoperates when a. carriage return 'operation is begunl to open contacts. 313; and close contacts 314, and operates to reclose contacts 313 and open contacts V314 when the carriage return operation is com pleted. As the contacts 313 are in the clutch magnet circuit, the latter circuit will now be open at two points; viz., the contacts 313 and 455. When theA contacts 314 close. they establish. a pick=up circuit forv the main coi-l 450 of relay 448 through the now closed: pick-:upy contacts 441. This picke'uip circuit is as." follows.: frm the D; C. plusv har 416, plug schets: R54 and T54, wire 456, contacts 314, wire 459, insert switch 221',y wire 445, sockets4 Til; andv RSI, Wire 446, pick-up contacts 441, wire 449, main coil 450, wire 45l,rcontacts 96, and wire 452 to the moriscos-441. The relay 448 is thereby 'again picked up and is held by its hold contacts 453 as Before aus its contacts. 455111 the clutch magnet ireiit close, Eitthe latter ir'lit is not closed as typewriter contacts als are stm operi; when the carriage oporationl is yby the energizing of the bucking coil 491, and the clutch magnet circuit is opened both by contacts 326 and 455. The closing of contacts 321 connects the wires 456 and 469, the same as contacts 314, and they thereby estatblish the pick-up circuit which was traced'above for master-control relay 448. The relay 446 is held energized 'by its contacts 453, and when the tabulating operation is completed and the contacts 326 again closed.l

the clutch magnet circuit is again established and cyclic reading operations are resumed.

When a back-space code designation is sensed, the typewriter is caused to back space and the master relay 448 is dropped out due to the energizing of the bucking coil 491, and the clutch magnet circuit is opened by relay contacts 455, as before. However, as a back space operation only requires a relatively short period of time to be completed, the relay 448 is immediately picked up again and held and the clutch magnet circuit 'restored by the contacts 455. The latter is eiected by contactsr 3|6 connecting wires 456 and 469, 'such contacts 3| 6 being closed by a typewriter element which moves as a result of a backs'pace operation as explained in said copending application.

' The operation of the reader |66 may be manually stopped by depressing either stop switch 26 Yor 226. One side of switch 26 is connected directly f vto the A. C. supply wire 466 and the other side of switch 26 is connected to the other A. C. supply wire 46| through a wire 425, a wire 426, the rectier 493 and wire 469 and switch 24. One side of lstop switch 226 is connected to the A. C. supply 'wire 466 through the wires 464, 463, plug sockets T56 and R56, and wire 462, and the other side of Yswitch 226 is connected to the other A. C. supply wire 46| through the Wires 49| and 492, plug `sockets T49 and R49, the wire 490, the rectifier '493 and the wire 469 and switch 24. Thus, when Jsumed only by depressing either of start switches '25 or 225 to pick up the master control relay, as

previously described.

' In accordance with the present invention provision is made in the apparatus disclosed for automatically stopping the operation of the apparatus in response to the producing of a significant code signal. As shown in Fig. 13, the Stop codedesignation indicated at the extreme righthand end of the tape comprises code holes in the number l, 4, 5, and 6 code positions. The sensing of this l----G code designation when the typewriter is in either case position, energizes translator magnets Ml, M4, M5, and M6 vand v thereby establishes a circuit owpath through the translator including the transfer -contacts Ml-fl in their loweror transferred positiomwire 419, contacts M2`2 in the position shown, wire 486, contacts M3--3'as shown, a wire'566, con?i tacts M4--5 in their lower position, wire 56|,fconi tacts M5|6 in their lower position, wire 562, contacts M6--26 in their lower position,'andfa terminal wire 563. The wirep563. isconnectedby the wire 426 to one A. C. input terminaLof the rectier 493. Thus, with thefclosing of the-A. common contacts |66,.current flows through'ja circuit including the A. C. supplygwire 466; the wire 411, contacts |68', wire 416, the'co'ntrolling circuit ow path just 'described as being'- estar#v blished by the sensing of the 1,-4-4-5-6 code code designation, the rectifier 493, and wire 469', switch 24, andthe other A.'C. supply wire46l. It will be apparent that if the switch 2.24' is closed instead of the switch 24, the circuit will include instead of wire 469 and switch. 2'4", the plug sockets R56 and T56, wires 465, 4|3 and 4I2',`th e switch 224, wire 4| l, plug socketsfT55 and R55, and wire 4|6. The iiow of current through this circuit closedby contacts |68 thereforeenergizes the bucking coil 491 and drops out master control relay 446, thereby opening relay contacts 455 and the clutch magnet circuit which deenergizes' the clutch magnet CM and stops' further reading operations, as explained hereinabove. '1

As explained herein at the beginning' of this specification, it is also a yfeature of the present invention to provide for automatically'fstopping the reader in response to the sensing of a significant code designation with the type basket shifted case position, and to provide for l the printing of a normal caseletter character when this same signincant code dsignation is sensed with the 'type Lbasket in its normal case position. As shown in Fig. lwthe 3-5 code'v designation represents the normal case letter character H Q" There is no shifted case character represented byV the 3 5 code designation. When the 3-5 code designation is sensed, translator magnets M3 and M5 are energizedand a controlling circuit ilow path is thereby established through the trans lator which path is connected to the terminal circuit wire 56,6 and plug socket connectionsl R6 and T6. This circuit now path through the transiat-or will not be traced as'it is believedl that it will be obvious from the foregoing description. As shown in Fig. 12b, plug soclet T9 is connected by a wire 561 withy the center blade or strap '266 of the transfer contacts 26|, the lower strap'264 is connected by'a Wire 566 with the solenoid.y 241 for actuating the "I-I type bar, and the upper strap 262 is connected bya wire 569 withth'e wire 49| and through the wire 492, plug sockets T49, R49, wire '496, rectifier 463, wire 469 and switch 24 with the A. C. supply wirev46l, If the switch 224 is closed instead of switch Y24, the con nection to wire 46| through the switch 224 will 1 be the same asthat traced above in connection` As explained; hereinabove, the transfer contacts 26| are held? with the stop code 1-4-5-6.

by thelarmr268 in the position shown in Fig. 12by when the type basket is in its normal casewposiiA tion. Thus, with the 4type basket in normal case positionv and uponthe. sensing o f the 3-5 c og'i designation andthe closing of A. C. common cori;A

tacts |68, A. C. current will flow through the last mentioned circuit flow path established by the translator. and through plug sockets R6 andMfTB, the wire 561, transfergcontacts26|` in the posi# tionshownthe wire 568, and the solenoidl 241 for .the letter HRT This will result in the printfing of the letter H in the manner previously explained.

As explained above," when the iShift" code case position and upon the producing of a predetermined character representing signal, to eiec- REFERENCES CITED trically connect its corresponding circuit ow path The following references are of record in the to the type member actuator corresponding therefile of this patent: to for energizing the latter and said contact means 5 UNIT ENT being eiective when said shifting mechanism oc- ED STATES PAT s cupies its said second case position and upon the Number Name Date producing of the same predetermined charac- 2,240,562 Lake et al- May 6. 1941 ter signal, to electricaily connect said correspond- 2,378,371 Tholstrup June 12, 1945 ing circuit flow path to said electrically respon- 10 sive device 'for energizing the latter.

HENRY L. THOLSTRUP.

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