US2333318A - Printing telegraph apparatus - Google Patents

Description

Filed June 9, 1941 3 Sheets-Sheet 1 FIG.1

INVENTOR. HOWARD L. KRUM ATTORNEY.

Nov. 2, 1943 1 KRUM PRINTING TELEGRAPH APPARATUS Filed June 9, 1941 3 Sheets-Sheet 2 F I G. 3

L. KRUM Nov. 2, 1943. H KRUM 2,333,318

PRINTING TELEGRAPH API ARATUS Filed June 9, 1941 3 Sheets-Sheet 3 INVENTOR HOWARD L. KRUM BY m J AT ORNEY Patented Nov. 2, 1943 PRINTING TELEGRAPH APPARATUS Howard L. Krum, Beverly Hills, Calif., assignor to Teletype Corporation, Chicago, Ill., a corpora tion of Delaware ApplicationJune 9, 1941, Serial No. 297,179

Claims.

This invention relates to printing telegraph apparatus and more particularly to type wheel printers having a plurality of rows of type characters and apparatus for selectively positioning said type wheel rotationally and longitudinally.

A principal object of the present invention is to provide an automatic telegraph printer of simplified construction which may be operated at the speed of standard permutation code print,- ers but which may be manufactured at lower cost, and has a minimum number of operating parts.

Towards this end the preferredembodiment includes two principal operating shafts, one of these shafts carries all of the control or supervisory elements of the printer including a distributor cam and the principal function operation cams, while the other of said shafts carries an escapement wheel which establishes the rotary position of the type wheel in accordance with the received signal impulses. Both of said principal operating shafts are driven by a common motor shaft whose speed is regulated by the conventional synchronizing devices while the operating elements carried by said shafts are frictionally driven through auxiliary driving connections.

The type wheel consists of four cylindrical type sections secured upon a supporting shaft coaxial with said escapement-shaft. Through a lever train under the supervision of the cam shaft, the type wheel shaft is moved longitudinally with respect to its coaxially disposed escapement shaft into any one of four positions, in each of which one of the sections of type characters is brought into alignment with a common printing platen. the type wheel shifting apparatus isenabled to move the type wheel following each restoration, is determined by an arm associated with one of the levers in said train which may be intercepted in its travel by any of four blocking shoulders. Two selectable elements responsive. to two of the five permutation code components of each signal determine which of the four shoulders is interposed in the path of said arm and accordingly, into which'of the four positions the type wheel is moved. V

A secondary selecting mechanism consisting of a lever which is actuated by a number of cam projections carried upon the cam shaft and a latch lever which is also actuatedby a cam carried by the cam shaft but which effects the holding of the first leverin either of its 'set positions,-

serves to regulate the angular placement of the The extent to which escapement wheel which as has been said, is frictionally driven from the common motor. The escapement wheel has eight projections which individually and/or combinedly may be intercepted by an extremity of said lever that may be withdrawn or presented intothe path of the teeth of said wheel at predetermined time intervals cluringa cycle. Combinations of said interception operations determine the total extent of rotation and accordingly the ultimate position of the type wheel.

The afore-described train of levers which function to move the type wheel longitudinally and the just described selector mechanism which functions, to establish the angular rotation of the type wheel, both perform from a zerostarting. point and serve-concurrentlyto determine one of said fourrotary typewheel sections and also one of the longitudinal rows. The two selective positionings are established concurrently and also within the same cycle during which a code combination signal is received for determiningthe character to be printed, .there is exercised the actuating impulse for completing the printing operation. Thus, there is obtained in the in: stant apparatus a complete selectionand operation of a telegraph printing device within the time interval corresponding 'to its associated character selecting signal.

For .a more comprehensiveunderstanding of the present inventionreference may be, had'to the accompanying drawings and'tothe detailed description followingv hereinafter. wherein iden-I tical reference characters designate corresponding parts throughout and wherein: p V

Fig. 1 is afront elevationalview of a printing telegraph apparatus with certain portions brolgen away andfhaving embodied therein the features of the present invention Fig. 2 is a fragmentary plan sectional view of the apparatus revealing the type wheel case shifting lever and operating mechanism taken substantiallyalong the line 22 of 'Fig. 1 in the direction of the arrows; I I

Fig. 3 is a transverse sectional view taken approximately on 1ine 3 -3 of Fig. 1 in the direc:

"tion: indicated by the arrows;

.Fig. 4 is a sectional detailed view of a portion of the operating mechanism as featured in Fig. l illustrating apparatus approximately on line 4-4 of Fig. 3; I

Fig. 5 is a transverse sectional View generally proximately on line 5 -5 of Fig. 3

Fig. 6 is a transverse sectional view taken approximately on line 6-6 of Fig. 3;

Fig. 7 is a detail view of the apparatus as illustrated in Fig. 4 but in a different condition of operation; and

Fig. 8 is a perspective detail view of the longitudinal type wheel shift selecting levers and auxiliary mechanism.

Referring now more particularly to the drawings, the reference character ll denotes a base plate on which is supported in vertical position a principal wall I2 and an auxiliary supporting".

wall [3. Attached to the principal supporting wall l2 are a pair of box'journals i4 and the former carrying the driving portion of the cam shaft It as best indicated in Fig.3 and thelatter carrying the corresponding portion of the escapement shaft l'l.

Rotary power is supplied by an electric motor l8 upon whose armature shaft there is the driving worm H! which meshes with both the driven wheels 2| and 22. From the indicated arrange ment it will beunderstood that the shafts It and I! are driven in relatively opposite direction which, asindicated in Figs. 4' to 7,'is clockwise and having a reduced section 28 which fits ccntrally into an opening of the shaft I! so as" to be concentric to and rotatable therewith. Driving engagement between shaft H and its coaxial subservient shaft 21 is had'through the medium of a coupling 35, which consists of an armin- In coaxial alignment tegraliy associated with shaft 21 and having a laterally extending portion 3i, see also Figs. 4 to '7', which is received within an approprlate slot in. the. frictionally driven escapement disc 25.

A type wheel 32 having four'circular' sections of type characters and eight characters on the periphery of eachv row is integrally associated withthe shaft 21 and is displaceable longitudinally therewith after the manner indicated by the'dotted "outline 32, Fig. 3." In the reduced portion .33 of driven type wheel shaft'fl there i is nested a disc, formation.3,4, Flg.";2, of. a bell crank lever ,35, pivoted at 56. X, The bell crank 35 1s normallyv urged intoits counterclockwise (Fig.2) position. by a spring 31 anchored to a suitable part of the stationary. framework. Opposing the eflect of spring?! is a lever 33, Fig. 1, pivoted upon a screw 39 and having' three arms designated; and 43: Of these; arm 4! extends upwardly and isheld against a gooseneck formation 44 of a pivoted follower lever 45 by meansof a compression spring 46 which sur-' rounds the underturned portion of theg'oos eneck formation 44 and is looped around the'extrer'nity.

of arm 4|. A sidewardly extending arm '4'! of lever 45 is .formed with a follower projection which is adapted to ride upon the periphery of cam 48, Fig. 5, so that during the course of a cycle of revolution of cam shaft l5, lever 45 is moved inaclockwise direction about a pivot 45 causing lever 38 to berotated'lna counter-clock in Fig. 3.

wise direction about its pivot 33 under the yielding pull of compression spring 46.

The foregoing described train of elements from the principal mover, cam 48 of cam shaft I6 and including levers 45, 38 and 35, serve to shift the type wheel shaft 21 longitudinally of its axis withdrawing the reduced portion 28 of shaft 21 from within shaft IT. From the shape of cam 48,- Fig. 5. it will be apparent thatthe movement imparted to the store-described train of levers is a gradual one in the direction of projecting the type wheel rightwardly as viewed In the absence of any interference to this movement, type wheel 32 will continue in this direction until the innermost one of its cylindrical sections is brought into alignment with a print hammer or platen 5|, Figs. 1 and 3. A manner of selecting oneof the several cylindrical type wheel sections for alignment with 20 the print hammer of platen 5| is provided, through the agency of the arm 43 of the aforedescribed intermediate one 38 .of theseries of levers which. constitute the train between cam 48 and shaft 21. 'As may be noted from-Figs. I, 5,.and 6, arm 43 in rotating counterclockwise about pivot 39 together with the other elements of its lever 33 described an arcin which path there are normally disposed the. extremities of three blocking levers designated generally 52.33

and 54.

or the three levers,'52, 5a and 54. two have rearwardly extending portions 55,11gs. 5, 6 and.

plane as does the reannost or follower extremity as of lever 54, *an'da slmilarly 'shaped but radially ofl'set earnil lies in the same'plane as does,

the follower extremity 55 of lever 52, Fig. 5. Wheneitherone of'the'iever extremities 55 is engaged by. it'sgassociated cam apex; 55 or 51, that end ;of,-the lever is thrust rightwardly as viewed'in Figs. 5 or 6; pivoting its said associated lever'52 or 54 upon one or the otherof the alter? native pins designated 58 and 53 each commonto both ofsaid levers; It is to' be'rloted that levers 52and u are providedwith normalizing springs 8|, orj32'tend-, ing to rotate their respective levers ina counter clockwise direction; In addition thereis' pro-. vided upon'each one of the levier 52 and 5 4 a shoulder projection designated 53 against which there may be disposed the extremity 6401' a line, magnet arma ture pivoted .at 55. When the magnet Hi energized pursuant 'to a marking line signal condition, its armature 65 is attracted and held in its ,counterclockwise positlon with respect to pivot 66 and with extremity 64' inter-L posed into'the path of shoulders 53 offlevers 52 andY54.v When the operating cycleduring which. apex 55 o'rf51 engages its associated follower; 55

is coincident with the energized condition of mag-- net '51, extremity 64 prevents said lever from roe,

tatlng'about shaft 53 as a center and causes its rocking instead upon shaft .58 as a center.

Accordingly/instead of lever 52 or pivoting about shaft 59 'as'the center, therewill he effected instead a pivotal movement about shaft 58 as the center with the lowermost extremities of either or both said levers 52 or 54 shifting relatively leftward as viewed in Figs. 1, 5, or 6.

As a result 01 this movement on the part of any one or more. of the lever extremities which ordinarily lie in the path of the sidewardly extending projection 61" of probing arm 43, the

eounterclockwise rotation oflever 33 will ac-.

cordingly, be permitted to. a greater or lesser de-- gree depending upon which oneof said levers 52, 53 or 54 remain to block the'progress of said sidewardly extending projection 61. Although buttwo full length levers 52 and 54 are provided under the direct control ofmagnet armature 65; a total of four variable conditions may be obtained through the auxiliary effect of intermediate lever 53. The latter member though not controlled directly by any of the cams of cam assembly '24 her under the direct control of magnet 51, responds, nevertheless, in an indirect manner to the control of cam assembly 24 as will now be described. I i

As has been said, lever 53 is pivoted upon shaft 58 and is located intermediate the two levers 52 and54. Furthermore, it is provided with a stud pin 68 which projects a short distance on both sides of said lever 53 so as to be interfered with by either one of its adjacent levers 52 and 54, Fig. 8, when one ofthem is moved clockwise because of the operation of "one of the cams 56 or 51 coincident with the energized or marking'condition of armature 55. The extremity of lever 53 extending into the path of projection 61, is longer than either of the other levers 52 or 54. Accordinglyfit alone serves to block the move ment of arm 43 when none of the lovers is re-' moved from blocking position resulting thereby in the placement of type wheel 32 in afirst case selection position such as indicated in. solid outline in Fig. 3, 'i e., with the first section of its four type'wheel sections in alignment with the print hammer 5|.

When lever 52, Fig- 5, happen alone to be moved by its associated cam projection 51 so that its lowermost extremity is moved leftwardly, it takes lever .53 with it on account of the overlying pin 58, and the blocking extremity of lever 54 is left in the path of projection 61 with the result that there is obtained an extent of movement of'type wheel 32 longitudinally, so that its second. typing section is brought into alignment with print hammer 5!. As a further alternative of operation, when lever 54 is dislodged by its cam projection-55 it, too, moves intermediate lever 53 outof blocking the projection 51 and there remains the extremity of-lever 52 in the path of said projection 61, causing to be effected the third alternative condition; namely with the third section of type wheel 32 brought into align ment with print hammer 5!. Y

The final alternative condition obtainable in accordance with thisselectingapparatus, is one where both levers 52 and Y54 are removed from blocking engagementwith projection 51 taking intermediate lever '53 with thezn-and in this case a shoulder '$9,-which may be formed integral with any one or all of the levers 52, 53 and 54, serves to block theprojection 6'! in its ultimate or fourth degree of movement, obtaining there-' by a condition when the fourth typing section of wheel 32 is brought into alignment with print hammer 5|. Thus-there is obtained a total of fourcase shift positions under the control of two principal selecting :elements; namely, levers 52 and 54 each under the control of-one of the impulses of a five-unit permutation code. -Thus, there is consumed two of the five impulses of each permutation code in the longitudinal positioning of the type wheel 32 leaving a total of three selective impulses remaining for-the purpose of positioning the type wheel radially, which performance will now be described. r

The normal or -zero position of shaft 21 and;

its integrallyassociated .type 'wheel 32 obtains when the sidewardly extending stop lug 'H rests against the sidewardly extending lug-12, Fig.4, of the single selector lever'l3 which is pivoted solely upon the afore-described-shaft' 58. The arrestment of. escape wheel 25 is thereby effected and this obtains when said lever 13 is in its clockwise extreme position such as that illustrated in 4 as distinguished from its counterclockwise position shown in Fig. '7, with said lug 12 in the path of the sidewardly extending formation of stop arm ll. During the alternative condition: of said lever l3, namely, its counterclockwise position as shown in Fig. 7, the stop lug I2 is moved out of the path of said sidewardly extending portion of stop arm 1| permitting the. continued rotation ofv escape wheel 25 in a counterclockwise direction as urged by the constantly rotating shaft I! through the friction disc 26 until one of its teeth 9| encounters said lug 12. '1 i i A retaining lever I4 pivotedat l5 and urged b a spring 16 in a clockwise direction may present its pointed detenting projection I1 alternatively in one of two V-shaped recesses of the uppermost extremity 18 of said lever 73. When in the position illustrated in Fig. 4, detent projection 11' rests in the leftmost of the two recesses and when said lever 13 is inits alternative condition;- namely; with stoplug 12 out of the path of stop arm 1.l,'then the detent projection l'lis adapted to dwell in the other of'said two detent recesses.

In cooperation with lever 13 and complementing its performance in releasing the teeth of wheel 25, is a companion lever 19, Fig. 4, resembling in contour generally one of the afore-described two levers 52 and 54. It,-too, is provided with a spring 52 for urging it in a manner so as to dispose the clearance of longitudinalslot 8| in the right-hand extremity of pivotshaft 58 just as in the case of levers 52 and 54. An integrally formed shoulder 53 alsois similarly affected by the fluctuation of the armature extremity 54 after the manner already described in connection with the two case shift selectorlevers 52 and The lowermost extremity of lever 19 is provided with a V notch 82; Figs. 4 and 7; within which there fits the other selector lever pivot shaft 59 so that depending upon the condition,

of armature E4, leverlB too may rotate about shaft 58 as a pivot orrabout shaft 59 as a pivot, as it isengaged'by'any one of the four cam pro jections 83, 84, and 85 of a cam disc STcar -Z' ried by the assembly 24. .The particular distribution of cam projections 83 to 86 is significant in connection with the timing of shaft I6. and when these are compared with the distribution of four corresponding 'proiections 83a, 84a, 25a and 85a, Fig. v"I, on a cam 88 located just behind cam 81 and in the same plane a is located the uppermost extremity 18 of lever 73, it will be seen that while the timing or the recurrence of cam projections on cam discs'B'I andthos ondisc-88 is the same, thephase relationship of the two discs is different. This is'becaus cam disc 81 controls lever 13 by engaging its follower extremity 18' on the "left of the shaft l6 (Figs. 4 and 7) while cam disc 88 controls lever T9 through engagement with itsfollower lob 89 on the right side .of the shaft I6 (Figs. 4 and '7). With respect to the line impulses of each permutation code, projections 83, 84, and 85 coincide with impulses '2, and 5 so that the instant of eng age ment between such projections and'the follower lobe 89 0f lever 19 will be understood to come-.-

grind with the store-recited intervals of the code combination signal, the remaining 581ml: intervals, namely, those corresponding to impulses i and 1,. being coincident with the times during which projection i1 enzagcs the follower lobe of lever 32 nd pmjctlon it engages the follower lebeodlevertl.

In angular arrangement the projections of cam 01, which operate through the'follower lobe I! of'lever '19, are so located with respect to shaft I thstwhen projection 83 encounters lobe 8! it n iloilowed shortly thereafter by an engagement between a. corresponding projection 83a of cam "and a follower portion oi'extremity'll of lever 11. Thereafter, projectmn 84 engages lobe 89 and rsiollowed shortly by an engagement between the corresponding projection "a on cam Cl and section It of lever 13. This succession of operation continues until all of the projections of cams 81 and 88 have had the opportunity to engate the contactingportions oftheir respective levers "and 13.

As will be observed from Figs. 4 and 8, the levor 13 is provldfl. with m angnlorlr (front-J ward as viewed inFlgs. 4 and?) extending proiectlim 12 whichrnay serve to block arm'1l as well a teeth 94 and thereby preventthe counter clockwise rotation of escape wheel 25. when lever 13 is moved in a counterclockwise direction about pivot 58 from the posifionin which it is shown in Fig.4 to the position in which it'is'shown in F1. I blocking projection, 11 is withdrawn from the top of the sidewardly ext ins part of arm '1i and is instead brought into the path of first mapementwheel tooth 9!.

when lever 19 restores lever 13 fromthis position whereat protection "was blocking escape member back into the position designated in Fig.7. g V i In accordance with the angle between the teeth "and M of canal! a, period of time'is per- H mitted to elapse which will permit the four teeth it of cam 25 to pass the position deslgmtedso that thereafter when projection 12 is moved into blocking-engagement it will encounter the'flfth tooth 9|. It is to be noted, however, that the restoration movement to lever 18 which is etfected by the action of lever 19, is etlective only 7 when armature B4 is in the blocking position of shoulder 6! as designated in Fig. 4., It armature 64 at any particular time when a projection of cam 81 engages lobe 89 happens to be in its alternative position, that is, free from shoulder as, then instead of lever is rotating about'p'oint 58 as a center, it rotates about shaft 59 asya center and describes an arcuate movement with respect to shaft 88 as permitted by the elongated hole 8| in lever 19.

\ Summarizing the operation oi.v cams 81 and 88, it will be understoodthat shortlyafter one of the projections on cam 88 acts to rotate lever 18 in a counterclockwise direction about pivot 58, a projection on cam 81 encounters the follower lobe 89 of lever 19 and thereupon may or may not restore said lever 18 to its clockwise extreme position dependingupon wlm'tlm the armature is in tbelblodcintm-cleuingpositim no: respect to shouider 6|. It into-be noted, moreover. that the arrangements'oi projections on cams an and an alumni mntmlly corresponding I cam for cam, present a significant spacing with respect to the projection oneach cam. 'TMB'LSI'" rangement of com projections is 'espccialh h signed so as to permit the esoapement or theteefls.

9| of escape wheel in certain-88 1mm groups. Starting from the zero position of shalt invariably coincident with thestop ilnpulleso V asto restore thetypewheel and I sembly to zero position.

It is who noted that the commissions pmiectiom on cams I1, 08. Bland i1 is such as to correspond with the occurrence of the five ins pulses in a permutation code signal; As has already been said the positionim of the type wheel longitudinally is in accordance with first and third of the code combination while the. positionment of the,type wheel rotationally is in accordance with the wound, fourth, and fifth hnpulses of a code combination. Following the posh tionlng oi the longitudinal or case shift levers,

namely, 52 and .54, cam 48. 6, acting through the store-described linkage 88. and 35 attempts to shift the type wheel longitudinally in accordance withthe degree of movement permitted by the interception am II of said lever 30. This arm is capable of four extents of move ment in a counterclockwise direction as'already explained. In following a setting of lever N. which is encountered by com apex 8, am it is ex ected to engage the extremityjotjsaid'lever i4 and maintain it in its setposltionas placed by the projection of camlfl. The mass of'the' type wheel and theother mechanisms which are brought into motion together with lever 88 may, under higher speeds of operation, delay the spouse of arm 43 so that com ll may override the follower lobe of extension 5! oi lever A and ermit said lever to resume its normal'po'sl tion before probe arm 43,118; 8, had a chance suillciently toengage said blocking anti-entity of said lever 54. 1

For this reason, a temporary latch lever 96, Fig; 8, has been "provided which pivots about center, and is urged in a clockwise direction by a" spring 91. Lever l is'form'ed' with a latching" shoulder 98 that is adapted to slip behind the sidewardly extending projection 9'9 integrally formed with lever El. Accordingly, when the latter is positioned by its cam "during the mark in'g condition of armature II and its remoteeao tremity is moved outof blocking position with respect to projection '61, the integrally formed 1112 98 passes beyond the said shoulder 98 nerf wardly extending lug 81; and thcreaiter upon.

As an incident to each cycle of rotation of shaft I6 and operating invariably in response thereto, cam 95 afore-mentioned, rotating in a clockwise direction gradually raises the follower extremity IOI of a bell crank lever I02 pivoted at 49 so as to thrust its curved arm I04 rightwardly to engage the upstanding arm I05 of a rock shaft I06. As a result clockwise movement is imparted to a lever arm I01 having two branch arms-designated I08 and I09 and causing the former through its pivoted pawl III to rotate the tape advancing sprocket wheel II2 one tooth distance in'a counterclockwisedirection. *In' so doing, the rotation of tape feed shaft I I3 is effected overcoming the influence of a detent pawl H4, Fig. 1. Shaft II3carries a friction feed roll I I5, Fig.1, which in cooperation with a follower friction roll H6 carried by a spring loaded bell crank II'I grips the paper between them feeding it to the left in accordance with the progress of Wheel II5. Th other branch I09 of said arm I! is provided with a forwardly extending lug H8 which underlies a flat bar II9 carried by a horizontal spring I2I and integrally associated with the print hammer projection The clockwise movement of lever I0! is slow and gradual as indicated by the gradual involute curve of the periphery of cam 95; however, when follower projection I0! reaches the dropoff I22 the counterclockwise movement induced upon arm it! by the spring I23 which is tied to arm H35 causes said projection II8 to strike sharply against the plate H9 and impart an instantaneous blow by the print hammer 5|.

Printing ink is supplied to the type wheel 32 by means of an intermediate ink transfer roll I25, Figs. 1 and 3, which in turn is supplied throughout its surface with printing ink from a porous supply r011 I25 supported parallelly thereto and longitudinally in surface contact therewith. Both rolls I25 and I25 are provided with trunnions I 21 and I28 which fit into slotted openings I29 and I3I of a pivoted yoke member I32 under counterclockwise spring tension, Fig. 1, about its pivot shaft I33.

Operation The motor I8 is a source of rotating power and through its driving worm I9 there is imparted rotation in opposite directions simultaneously to the two driven worm wheels 2I and 22. Theformer being of larger diameter than the latteryshaft I6, it will be understood, will be driven at a comparatively slower speed than the shaft I1 of the latter worm wheel 22. The tributary mechanisms of both shafts are arrested, however, under normal condition when current is on the line and when no permutation code signals are received. The arrested condition obtains when line relay 6'! is continuously energized attracting its armature 65 so that the blocking projection 64 is positioned behind the shoulder 63 of they several selector levers and when concurrently an eccentrically disposed armature screw I35 urges against the push rod I36 which throughthe conventional orientation unit, such as shown, and described more fully in U. S. Patent No. 1,904,164 to S. Morton et al., is disposed so as to maintain stop gates I31 rigid against the influence of cam assembly arm Upon the receipt of the start impulse ofnany codecombination signal, which impulse is invariably of spacing nature (no'current in contrast to the normal or holding current of the line) armature 65 is released withdrawingsaid screw I35 from: push rod I36 and armature extremity 64 from behind the shoulders 63 of the several selector levers 52, 54, a'nd 19. In consequence'of the unlocking of stop gate I31 which action 'is explained'in the'foregoing' patent, cam assembly arm 138 is permitted to overcome the effector a mild holding spring of said stop gate I3? releasing the entire cam assembly 24- for clockwise rotation as viewed inFigs. l ands to 7. When the cam as'sembly'24 has rotated in the clockwise direction sufficiently for projection 83 of. cam 8! (Fig.4) to dislodge '-or rock counterclockwis'e thelever 13, the latter member's extremity 12 will be withdrawn'from the path ofv escapement wheel stop arm II; and escape wheel 25, which is constantly driven throughthe friction discs 26, will be permitted to rotate counterclockwise 'until its first escape tooth', 9| encounters said projection I2 whereupon escape wheel will be momentarily arrested.- f During the receipt of the succeeding fiveimpulsesof the'code combination, the responses of the selector mechanism'will depend; upon the particular nature of each impulse. Accordingly, with '.-various code combination sign'als therewill result a varying degree of rotation on the" part of escapern'ent wheel 25 and'through its integral association by means: of bar 3! with the type wheel 32, the latter member will accordingly be variably positioned together with "shaft 27 while atthe same time longitudinally shifting bell crank 35 will, through its articulation of levers, project the type wheel 32 longitudinally of its axis a characteristic amount depending upon the degree of counter clockwise rotation permitted to the probing arm 43 by the selector levers 52, 53, and 54 as afore-described. j Within the same cycle of operation that the 'afore-described functions are executed, earns 48 and will engage a series of motion transfer levers and will respectively execute the shift function and trip the print hammer. It is to be noted that the print hammer actuating lever including arm I01 also carries the tape feed pawl III which during the loading motion of the lever train causes the. counterclockwise rotation of tape feedwheel. II5.

The selection "is performed by four principal selector levers,v two of which designated 52 and 54 control between them a third designated 53 to yield a total of four case shift positions for the longitudinal shifting of the type wheel. Two other selector elements designated 73 and I9 operate in a complementary manner to regulate the extent of escapement on the part of wheel 25 and, accordingly, the rotational positionment r the type wheel 32... v

While there has been described above aspecific embodiment of the invention, it is to be understood, nevertheless, that numerous changes and modifications may be instituted ,withoutdeparting.from vits essential spirit orscope; accordingly, it is not intended to,be limited by the specific disclosure of the accompanying Jdrawings nor by the particular language of the foregoing specification, except asindicated in the hereinafter appended claims. V

What isclaimed'is': j, I I

1. In a printing telegraph apparatus, a rotatable type carrier having .four annular sections each relating to a case position, means for shifting said type carrier longitudinally to present any one of said sections-selectively into printing positions, means for rotating said type wheel so as to present individually any type elements 'on each section in radial printing position,-'and a start-stop selector shaft comprising a plurality V of camseach associated with a permutation code element-and means under the control or said cams for concurrently moving said type wheel longitudinally and rotationally to select an india pair of, levers for regulating the movement of said escapement wheel, means responsive to certain impulses of a permutation code for operating said pair, of levers correspondingly, a selector mechanism for regulating the longitudinal positioning of said type wheel comprising a pair of further levers each responsive to an impulse of a code, a lever common to said pair, and a type wheel shift train including yieldable means. operated in accordance with the positioningoi said further levers. V I

3. A permutation code printing apparatus comprising a'frictionally driven rotary typewheel, an escapement wheel having a plurality 01' peripheral teeth and integrally associated with said type wheel, cam actuated means for moving a stop into the path of theteeth of said type wheel, and a selectable lever for withdrawing said stop from said teeth in accordance with signals re ceived over aline, 1 V 4. In combination, a frictionally driven rotatable member, 'an escapement wheel integrally escapement wheel, cam means for inter-posing one 01' said levers to arrest said wheel a plurality of I times during each cycle of rotation of said wheel, and magnetically controlled meansjior regulating the other of said levers to withdraw saidone of said levers selectively in accordance withline signals. h

6. In a telegraph printing apparatus, a selector mechanism forpositioningj a rotary type wheel concurrently in rotary andlongitudlnal movements including a type wheel'ca'se shiftin'gapparatus comprising a pair of signal impulse con trolled levers, a common lever under control or said signal impulse controlled levers, a probe associated with" said apparatus and arrestable'in any or four case positions under the supervision of said impulse and common levers, a frictionaily driven escape wheel havingcyclic rotation, a first cam actuated lever for interposition in the path of said escape wheel to arrestsaid escape wheel I I mean in anyiof a plurality ci'radialposiitions, a cam actuated lever for. withdrawing .said flrlt cam: actuated laversalectivelyamnnber at times during each cycle, and magnetically controlled means interposed in the path voizsaid second-mm actuated lever. icrxvarying. its pivotal opemiinn in accordance with incoming line signals Y '1. In a telegraphselactor mechanism. time tionally -;driv.en wheel, a pnllr or,- lemrs; m m trolling therotafiom .0! said wheel; ,i'or int-amusing one otsaidleversto medicaid wheel a certain number of times during each cycle, and magnetically controlled resulating the other .0! said levers to withdraw laid one of said levers a, variable numherjof time! iii-accordance with linesignal mpulses.

. a. ma. telesramiwmtms w r tua. selccwr mechimismlfor no ein a wheel longtim i e lv d ro a on ly. mvflwstm'whod sh i nsasm ctuaioprobe ass ci ed we add apparatus and :arrestable in any of four positicns, a frictionally driven escape wheel integrally associated with said type wheel, a first-cam actu ated. lever for interposition in the path or said escape wheel to arrest it in any of a plurality of radial positions, a second cam actuated leverior withdrawing said first cam actuated lever, and

magnetically controlled means;interposed into the path of said secondcam'actuated lever for varying its pivotal operation in accordance with incoming line signals, 7

9. In a permutation code selector mechanism.

the combination comprising afirst shaft having a plurality of cyclically rotatableoams. a second shaft having a type wheel and an ascapement wheel with characters on type wheel Dee ripherally disposed to coincide with teeth on said escapement wheel and escapement means comprising a lever actuated by said cams a number of times for variably escaping theteeth :on said escapement wheclin accordance with permutw tion code-signals for correspondingly permitting the rotation of said typewheel.

10. In a permutationcode selectorthe combination comprising a flrstzshait having a plurality of cyclically rotatable cams peripherally disposed: on saidrhait to-coincide with the intervals iii-occurrence of Pe mutation code impulses of a signal, aseoond shaft having a type wheel and an escapement'wh'eel with character:

on said type wheel peripherally disposed to coincide with teeth on slld eocapement wheel, and an escapement control means reciprocated by said cams on" said camshaft for variably passing the teeth or said escapement wheel in accord ance with permutation eoderline signal for ccrrewondhagly positioning and 11. In combination} trictienlliy 'driven'es capement wheel having a pluraiity oi erally disposed esoape teeth, a trictlonally. driven cam assembly having a per-1 mm disposed cam rotections corres'oae for one to the impulses o! apex-mutation 006e,!

magnet and armature responsive to-the Hum. ticns of signais amii-meammsved band fro by said am assembly and rcspomm'in accordance withthe lincsignal 'impulsas mnirost members each having a oharacteristicstcp abuh ment and arranged in transverse alignment, a probing extension yieidably moved --in- Ir-m to encounter said alignment, and telegraphically controlled means to selectively withdraw any of said members from said alignment to accordingly vary the extent of movement of said probing extension.

13. In a selector mechanism for supervising the rotary arrestment of a type wheel, a frictionally driven shaft, a type wheel carried by said shaft, an escape wheel carried by said shaft having a number of escape teeth corresponding to type elements on said type wheel, a pair of escape levers, and means operative during the receipt of component impulses of a telegraph code for presenting one of said levers in arresting position before each of said escape wheel teeth and under the control of other of said levers for withdrawing said one of said levers when a code impulse of a predetermined polarity is received.

14. A selector mechanism for supervising the arrestment of a frictionally driven rotary shaft,

comprising an escape wheel having a predetermined number of teeth carried by said shaft, a

blocking lever, and means for interposing said lever into blocking engagement with each of the teeth or" said wheel and a withdrawing lever for displacing said blocking lever in response to electrical impulses of a predetermined polarity.

15. In a printing telegraph apparatus, a type wheel, a multiple tooth escape wheel integrally associated with said type wheel and having cyclic operation therewith, a pair of supervisory levers, means for interposing one of said levers into blocking engagement with each of the teeth of said escape wheel during its cycle of operation, and means including the other of said pair of levers for selectively withdrawing said one of said levers under the control of predetermined electrical impulses,

HOWARD L. KRUM.

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