USRE22592E - Telegraphy - Google Patents

Description

L. I M. POTTS Jan. 16,1945.

TELEGRAPH! 4'Sheeis-Sheet 1 Original Filed May 9, 1940 INVENTOR LOUIS M. POTTS AT TOR NEY- Jam. 16, 1945. M. POTTS Re 22592 TELEGRAPHY Original Filed May-9, 1940 4 Sheets-Shet 2 INVENTOR LOUIS M. POTTS ATTORNEY Jm ls, 1945. L. M, gw Re 22,592

' v TELEGRAPH! I Original Filed May 9, 1940- 4 Sheets-Sheet a INVENTOR LOUIS M. 'PQTTS ATTORNEY L. M, POTTS Jan. 16,1945.

TELEGRAPHY Original Filed May 9, 1940 4 Sheets-Sheet 4 FIG. I?!

FIG. II

M SmOFw an H w. m cm W OPEIm v 5 53 a v 2 o b\ 0 "HM; Q F 3 a 0 ow. a s m 2 3 %2 2 am 22 m 8 77 v w RECEIVING STATION 1 Y INVENTOR LOUIS M, POTTS ATTORNEY Reissued Jan. 16, 1945 TELEGRAPHY Louis M. Potts, Evanston, 111., assignor to Teletype Corporation, Chicago, Ill., a corporation of Delaware Original No. 2,339,292, dated January 18, 1944,

Serial No. 415,694, October 20, 1941, which is a division of Serial No. 334,108, May 9, 1940. Application for reissue September 18, 1944, Serial 9 Claims. (C1- 1.7817) The present invention relates to printing telegraph apparatus and more particularly to cyclically phased type wheel printers having a plurality of printing positions.

The principal object of the present invention resides in the provision of printing and selecting apparatus designed to enlarge the range of selective possibilities in start-stop telegraph systems without extensive modification of the fundamental practices in printing telegraph selecting apparatus and without increasing the number of component impulses from that of conventional signals. This application is a division of copending application Serial No. 334,108, filed May 9, 1940', now Patent No. 2,323,932.

The use of a plurality of case shift signals in controlling the operation of telegraph printing apparatus is generally known butcertain novel aspects herewith introduced have to do with a conversion system for adapting existent practices in design and manufacture of type wheel printers to the use of a greater number of case shift control functions. As an incident to this practice, there is contemplated under one embodiment the utilization of a six-unit code for the supervision of apparatus constituted essentially of a five-unit selection and control mechanism, the presence or absence of the sixth impulse being a determining factor in establishing a secondary case shift control while the conventional pair of case shift signals are utilized additionally to the said sixth impulse case shift control for performing the primary case shift supervision. As a result, four in.-

stead of only two case shift conditions are pro vided, and these with but minimum modification in the essential design of a type wheel printer, such as thatdisclosed in-copending application Serial No. 193,642, filed March 3, 1938.

Ina type wheel printer of the design herein contemplated, the type wheel carrying shaft is a frictionally driven member surrounded by a number of parallelly disposed selector pins. A shaft stop arm engages one of these pins when any of the latter is brought into selective condition established by an individual disposition of five selector discs, each provided with peripherally dis-" posed notch and lug attributes, and the several adapted to be moved in response to the selective operation of a line signal supervised transfer mechanism. In addition to carrying the type wheel andacco-rdingly positioningthe latter angularly so as to present predetermined type faces into printing position, the type wheel carrying shaft is also utilized for supporting and rotating with it divers incidental function performing interponent elements. When certain one or ones of said elements are arrested in predetermined angular positions as controlled by the type wheel shaft arresting apparatus, there are conditioned corresponding one or ones of several function performing levers for executing miscellaneous incidental operations; viz., primary case shift, carriage return, etc.

An additional set of case shift control functions identified as secondaryto the conventional case shift operation is contemplated such that their incorporation into existing apparatus'may permit of an enlargement of several selective possibilities to an extent of doubling the available selective possibilities based on previous practice.-

In a modified practice of the instant invention a system of responsive relay elements is'made to final impulse of a preceding signal. In this way 7 the nature of the final impulse of a signal may be varied and thereby enter into the code combi-' nation of its associated signal as a permutation component. Also this impulse serves as a stop impulse no matter what its electrical nature happens to be and thu the need for a separate stop impulse is obviated.

For a more comprehensive understanding of the present invention, reference may be had to the accompanying drawings and to the detailed specification following hereinafter in which siniilar reference characters indicate corresponding parts throughout, and in which:

Fig. 1 is a vertical sectional view throu h aprinting telegraph apparatus, such as that featured in the co'pending applicatio'nmentioned above, having incorporated therein the improve-' ments which exemplify one embodiment of the instant invention;

' Fig. 2 is a plan sectional view taken approxinegative current characteristics for the purpose of obtaining a'shift control index; 7

' Fig. 10 illustrates a modified form of shift mechanism especially adapted for use in a system such asthatfeatured in Fig. 9;

Fig. 11 is a fragmentary plan section of a second modification apparatus;

Fig. 12 is a schematic diagram of a system which uses an apparatus of the type shown in Fig.

11 in which-the signals are of conventional'length',

but in which-a sixth impulse is incorporated with the stop interval and the start impulse is varied to contrast with the stop impulse; and

Fig. 13 is a diagrammatic chart of a code..sig.-.

nal such as may be used in the system disclosed in Figs. 11 and 12 showingvhoW-its component.

parts are functionallyallocated.

In illustrating the preferred embodiment of the present invention, Figs. 1 to 4,-a typewheel page.-

printing machine is used whose selector shaft is.

maintained in a .vertical position,- and'at, whose upper extremity is carried a cylindrical type supporting wheel having individually movable printing pallets. This type wheel indicated I I. is pro.-

vided with four annular rows of type pallets I2,

each pallet. ofi twhichflisradially slidable within. its own; confining groove, andea'ch annular rowoftwhich is retained and. urged towardsthe. concentriccenter'of the'wheel'by agarter spring I.3.-,

A- cylindricaltprinting platen I 4 iszjournaled upon asupportingxshaftilfi and is shiftable endwise step-:by-step in. one direction; in .response'to, printmg operations, and totally in: the other direction:

in response to a carriage return signal in.. 3.1113117.

ner: well-known among page printing-machines.

the-periphery" otplaten I4, is indicative :of the printing 1100115:- and; accordingly; denotes; the level at. which eachrow; of printingpallets must; be

aligned inorder: to present: it. into: printing en-.- gagement with said platen. It:

The-type-swheel H is integrallyassociatedwithv ausupporti'ng collar 22-; and is, splined to rotate. with thetypewheel; shaft; 23 butfree to be-shifted longitudinally thereof together with its. collar 22. Thislongitudina-l shifting of type-wheel II i exe:-. outed through engagement of -a shifting frame 24* whose: horizontalbar. 25 is slotted as at. 2.6.; Fig; 2," to straddle and b'e received within the groove; 21 of collar 22. For DUIDOSESiOf steadying'the shifting: framefl; itsobar 25 is provided at remote endsvwithxyokes 23;:Fig. 2;, of whichoneisvisible' in Fig.1 2, and. which; is; indicated thereat. strad dlin-g thensupportingcolumn29', parts: 28. and 29 being duplicatedat; the opposite end of: bar 25', but being brokenzawayiin. thfi'limltd. disclosure of Fig.2

Collar: 22, Figs. 1 is. prevented from rota-ting; withzrespect,.to.shaft:l3 by the interenga ement; between;--:its slide en agement coupling; bar. 31; wi h thati'3210faselector arm, sleeve 3:3... Because: of the tongue and groove en agement; between arms: 3I' and-32, type wheel; II, together with its collar 22, may be shiftediongitudinally; without disengagement of drivingconnection between said elements.- M. and "32, but. permitting, nevertheless.v

of: axial shifting. of the; type wheeland its associated" elementsthroughout a. distance: sufficient, tmelevate th -type wheel-to the dottedoutline position. of-Fig.1 1), whilestill. maintaining; thedrlving'gand -.'driven-.relationship, between the-Y Se-v' lector arm sleevee33andthetypawheelI I Sleevev 33. 1 and integrally associated selector maria-3.4 are 'bound-yto. the shaft. 23. so asxtorrotate;

wit it under lmpetusor thedriven;geanwheel 35 which maintains meshing engagement with the motor driving worm 36, but because selector arm 34 may be obstructed by oneor another of the plurality of selectable pins 31, the assembly, 'including shaft 23, may thereby be arrested at any oneof several radial positions correspondin with the several selectable pins 31. In passing, mention is made of the scant showing of a selector pin. assembly in Fig. 1. Actually this apparatus consists of possibly thirty-two pins 31 all similarly the adjacent surfaces of gear wheel 35 and said= discs. 38 and 38. As explained in' greater detail, in theabove referred to copending application, the rotary drum selector Which includes; the above-mentioned selectable, pins 37 is designed to, accommodatea five-unit code having; as its essential selector apparatusfiw circular discs 42 whose peripheries are provided-with a notchand. I

iug;.di.str.ibution. so that; upon each permutative placement. of the several. discs :4 2- I an. individual clearance is afforded. to .one of:'said several. sc

2 lectable pins 31 which. whenthat occurs, moves inwardly-to, presentits upper extremity, Fig; 1, into. the; path of. rotatable armv 34-, blocking the further progress of said arm and through itthe rotation of shaft '23..

This selection, arresting shaft 23 in any of thirty-two rotary positions, may not only serve toalign a=corresponding printing lug I2 for subsequent printing operation, but also, because; shaft 23. is a carrier of other selecting-apparatus, it may serve to condition special function operat-- ingmembers as more fully described in said copending. application. Of these special functions,

. certain ones only are'concernedin the instant disclosure, and these. will. be identified; asv the two primary case 'shift functions; namely, the conventional upper and lower case shifts.- In Fig. 1, the two selectablebars which execute thesecase shift. functions are illustrated in the lower portion of the figure-thy the reference numerals-- 4.3- and-44, the. former having a sidewardly ex tending lug. 45, and the-latter a similar. lug de-. noted 46.

The apparatus now described is that which, in

response tothetwo conventional case shift signals, exercises apart supervision in determining the extent of vertical shifting of the type wheel-.-

, present one or another of-the lugs:4.5 and 4E forwardly.. Whenbar. 43 is thusselected and its lug.

45 moves forwardly, there follows towards the conclusion of its selection cycle a rightward movement. of alLof the. bars,.including .43. and.

so; that. lug, .45., being. theonlyone in extended 7 position, is made. to engage the. lowermost eX-- tremity 41. of a. shifting-lever 48. whose opposite end, being. provided. with the.- open. slot... 49. and

The single straddling the stud pin of case shift plate 52 causes the latter to be moved leftwardly or into the position illustrated in Fig. 1. The immediate significance of this movement is its character istic placement horizontally of the anchor pivot 53, see also Figs. 3 and 4, but a further consequence of this operation will be discussed later.

Alternatively, upon the selection of the other shift bar 44 and the consequent movement of its lug 46 into the path of the lowermost extremity 54 of lever 55, there results the movement of case shift plate 52 rightwardly to an extent of movement as denoted by the elongated hole 55 and the consequent restoration of case shift lever to its first position, since the two levers 48 and are articulated to the common pivot shaft 5?, each serving to restore the other upon its selec tion. The result of the operation of lever 55 sofar as the specific contemplation is concerned is in the movement of said pivot stud 53 rightwardly for a. purpose to be discussed later.

Pivot screw 53, which has already been introduced above, constitutes a critical center and pivot support for an important element in the shift mechanism; namely, bell crank H3!l62, about which more will be said later. Moreover, this key pivot is anchored in a sidewardly extending shelf I04, Figs. 3 and 4, which is integral with the shift plate 52 whose progress from side to side is governed by the selectable levers ii-l and 44 as just described. When either of its alternative positions is established, shift plate 52 is thereat detained by the action of a spring loaded detent lever 50 which is pivoted to the plate 52 at so as to urge with its V-shapecl extremity against one side or the other of a fixed rod 16). When moved to its opposite position from either, lever 50 is cammed about pivot Ell through cooperation of its V-shaped nose and said rod "It;

Referring now again to the vertical shifting fram 24 which carries with it the type wheel I I,

it will be noted that its side wall, Fig. 1, contains an irregular aperture 58 whose lower edge provides two shoulders or steps indicated 59 and iii seen also in Figs. 5 to 8. The movement of frame 24 is maintained in a parallel vertical direction not alone by the aforedescribecl algnment studs 29 but also because of shaft 51, one end of which is rigidly anchored in the framework and the surrounding roller sleeve carried by said shaft fits closely within the confining slot 52 of framework 24. The frame 24 is lifted by means of an integral ear 63 to Which is connected a comparatively stout but nevertheless yieldable lift spring 64, having an upper loop which is suspended from the hooked extremity 65 of a lifting lever 65 pivoted at 61 in a stationary portion of the printer structure.

Lever 66 is of the third class type since the lifting force is applied thereto at an intermediate point in its length by means of a roller 68 which is carried at the end of one arm 59 of a bell crank lever whose other arm H, having an integrally associated bracket I2, carries two rollers 13 and I4. Of these, roller 13 is actuated by the periphery of an initially effective operating cam 25 carried upon the auxiliary shaft 16 while roller i4 is confined within the trackway of a side channel cam 11, the two cams functioning jointly in a manner fully described in said copending application.

Auxiliary shaft 16 and the principal control shaft 18 receive their power from drive worm 36, which is carried by the motor shaft, through a gear train which includes the primary driven gear '19, a driving gear Bl integral therewith and a secondary driven gear 82 carried by shaft 16 and meshing with the just described driving gear 8|. Cam "i5 is dependent for rotation upon tooth clutch 83, a positive saw-tooth driving coupling which is brought into driving engagement under the supervision of a trip lever initiated by a cam carried upon the upper end of shaft 18, said cam being part of a driven sleeve described in greater detail in said copending application, and dependcut for rotation upon the friction clutch comprised of the two discs 84 and 85, the assembly of cams 81 being free to rotate upon the release of stop arm 86. Shaft 18 rotating at all times under the influence of driving worm 35 imparts rotation to its associated apparatus only upon the release of friction clutches 84 and 85 to impart rotation to the cam assembly 81 and through the teeth of clutch 88 to impart rotation to the aforedescribed cam 'll.

Though type wheel shifting frame 24 is lifted to variable extents by arm 66, spring 64 and bell crank 69 as just described? the degree of movement on the part of the lifting levers is always the same. The extent of rise on the part of type wheel I! is determined by the position of a pair of stop lugs indicated 89 and 9 I, Figs. 1 and 5 to 8, which lugs are capable of being variously arranged so as to engage one or the other of the stop shoulders 59 and GI already described. It will be observed that lug BI is the lowermost one and also that it is substantially wider. than is the upper'lug 89. When both lugs 89 and 9! are in the leftward position as indicated in Figs. 1 and 5, then a condition obtains whereat type wheel II will be permitted to rise only to an extent which will align its upper row of characters l2 in printing position opposite the platen l4 and printing ribbon 2|.

correspondingly, when both lugs 89 and S! are moved into the intermediate position, engagement by shoulder Bl will be had permitting the type wheel I l to rise until its second row of characters l2 will be brought into printing position as shown in Fig. 6. When lug 9| is moved to the extreme right so as not to be engageable by either of the shoulders 59 and 51 and when under this condition lug 89 is permitted to assume its lefthand pos tion such as viewed,in Fig. 7, then the type wheel II is permitted to rise until its third row of characters I2 is brought into printing alignment. Finally when with lug 9| still at the extreme right and the.upp-er lug B8 is brought into the intermediate position, type wheel I I may be permitted to rise in response to the lifting apparatus until the lower or fourth row of characters 12 is brought into printing alignment as shown in Fig. 8.

Therewill now be recited a description of the apparatus which, in response to line signals, controls the disposition of the lugs 89 and 9| to effect the four designated case shift conditions i which will be referred to for convenience as the first, second, third, and fourth shift positions in an order corresponding to the aforecited description and also to correspond with Figs. 5, 6, '7, and 8, respectively.

Shift plate 52 is threaded to receive two stud screws 92, the latter being preferably of the shoulder screw type with neck portions of suffi cient length to be able to receive and support thereat the main body portion 93, Figs. 3 and 4 of lug 89. Also threaded into plate 52 are a pair Y of'shoulder screws 94 whose necks are 'of' suffiits other end loop secured to the anchor post 99 which extends from a stationary part of the machine, tends to urgelug 9I. and its main body portion 95 toward the left as viewed in Figs. 1 and to 8.. This influence is overcome selectively through the instrumentality of' bell crank member IOI-I02. One arm I02 of said bell crank engages the aforedescribed upstanding lug 96 of member 95, while its opposite arm is engaged by a lever arm I03 under conditions which will, now be described. Bell crank- IOII02 is pivotally supported upon'a shoulder screw 53 which, it will be recalled, is carried by'the shift plate 52 and particularly in a horizontally extending platform I04 thereof.-

A lever I05 of which arm I03 is'an integral portion constitutes one of a setof six storage members indicated in Figs. 2, 3, and 4. Of the set, however, lever I 05- is the only one having the configuration ingiicated, the remaining levers I06 being similar to each other but differing in contour as may be noted in Fig. 2. Certain common characteristics of all of the levers I05 and I06 include their alternatively selectable positions determined by the engagement of their stop projection I01 with one or the otherof a pair of limit pinsw I08 andv I 09, and their latch arm II I through which they may be. retained in one or the other of their alternative positions by a locking bail H2. Whenlatching-or locking bail H2 is withdrawn, as illustrated in Figs. 2 to 4, which is its condition during a brief signal transfer interval each lever I05 and I06 is capable of assuming either one or the other of its alternative positions and, in, response to a received code combination signal, a corresponding set of conditions is imparted to the set of levers I05 and I06 by means of.a set of positioning swords II3, flat steel members with blunt extremities H4, and universal connection discsIIO. Beyond this point, the selector mechanism generally indicated H4 is the same in structure and operation as that disclosed in the aforementioned copending application, save that whereas the distributor cam assembly H5 in the instant apparatus is provided with six setting cams. H6, the copending disclosure contemplates but five.

While all of the general class of storage elements I06 are capable of assuming one or another of the alternative conditions in accordance with the conventional operation. of printing telegraph apparatus. lever I 95, havin particular significance to the present invention, may also assume a right or a left position in accordance with the setting. it receives from its associated sword H3; The illustrations in Figs. 3 and 4 show lever I05 in the counterclockwise position; that is, with its lug I01 abuttingthe right side stop pin I09. The opposite or leftehand position of member I05 is indicated in Fig. 2. With a given setting or presentation of. pivot screw 53 .it will be understood that the alternative positions of lever arm I03'may be made to effect alternative positioning of hell crank IOI and through it,'in turn; to cause to be shifted through upstanding lug 96 the-horizontally shiftable body portion-195 of shift controlling lug- 9I.'

Accordingly, with lever 'I 05. in its spacing condition, as illustrated in Figs. 3- and 4, bell crank IOI is maintained mime clockwise'extremity'witlr arm I02 urging against the .upstanding'lu'gi'ilfi and maintaining body portion so. that lug- 9I seeks to achieve its right-hand extreme posi-- tion, as illustrated in Figs. 7' and 8. This condition prevails so long as selector I05 is in its spacing condition notwithstanding the twonos-- sible conditions of shift plate 52. However, when pivot 53 is moved (along with shift plate 52) toward the left, Fig. 6, projection 9| may then assume an intermediate disposition as shown.

Lug 89 which-is carried as an integral memberof plate 52 is shiftable together with that plate so that it may assume either one of two alternative conditions as illustrated, for example, in Figs. 5 and'6.- Because, however, elongated slot 55, Fig. l, is of limited extent onlyythe shifting of plate 52 leftwardly as for the purpose of placing projecting lug 89 to align vertically with shoulder 59 will also modify the placement of projection 9| through the engagement of the end of slot 56 with bolt 94 so that there is obtained ultimately a condition such as that illustrated in Fig. 6. But, it is to be understood that plate 52 may exert an influence on the dispo sition of member 95 only when said plate 52 is moved to its extreme right-hand position and when, under the circumstances, member 95 seeks to attain its extreme left-hand position. As a.

result of these efforts, plate 52 will be moved to,

its extreme right-hand position under th influence of selectable element 43, but member 95 will be limited in its effort to achieve its left-hand position. because of the restrictive nature of slot 59 which will permit said member to move leftwardly only to an extent where its projection 9! will assume the condition indicated in Fig. 6.

Recapitulat ng. selectable elements 43 and 44,. acting through the medium of levers 55 and 48, move 'p1ate'52 and together with it the projection 89 into either of two alternative conditions, as

exemplified in Figs. 5 and 6, Fig. 7 being, so far as projection 89 is concerned, similar to Fig. 5.

Selectable element I05 having two alternativeconditions and acting through bell crank IOI, spring 91 being a return agency, is enabled to move member 95 'and' through it projection 9| into either of two alternative conditions, asexemplified by Fig. '7 or 8 on the one hand and Fig. 5 on the other. The intermediate condition of Fig. 6 is attained when plate 52 i in its extreme right-hand position and member 95 seeks to achieve its extreme left-hand position. As a result, member 95 is intercepted in its path of progress because of the restriction by elongated slot 56 and is permitted to move only to an intermediate position, as illustrated in Fig. 6.

It is therefore to be understood that a total of four case shift selections may be achieved in re-. sponse to (1.) the two standard or primary case shift signals conventionally used for elevating. a

type wheel in the manner described in the co-' pending application referred to above, and (2) an additional or' secondarycase shift in response to the sixth codeimpulse which effects corre-.

s aonding positionment of the storage element First modification of a five-unit line signal code instead of a sixunit code, the secondary shift signal characteristic being inherent in the nature of the polarity of marking impulses instead of the marking or spacing nature of the sixth pulse. It is pro-posed, accordingly, to make available for signal transmission both positive and negative current potential, either one of which is to be used permutatively with no-current to produce five-unit Baudot permutation code signals, but whether the marking signals are constituted of positive current or of negative current will determine the alternative characteristic of the secondary shift control.

In the diagrammatic representation, Fig. 9,

the reference character I2I denotes a transmitting distributor of the rotary type which may be controlled by start-stop or multiplex (synchronous) supervision. A tape sensing unit generally indicated I22, is provided with six tape hole feelers. Five of them are committed to the fiveunit signal code, and their contactors I24 are therefore associated with the five segments of the transmitting distributor I2I, but a sixth one whose contactor is indicated I23, is designed to sense the presence or absence of a sixth perforation in a six-hole tape, and serves to introduce positive or negative current to the contact segment I34 which, in turn, introduces corresponding current condition to the marking signals, as will now be described.

The tape transmitting apparatus I22 may be of any conventional type, one embodiment being illustrated in U. S. Patent No. 1,661,012, except that instead of providing but five sensing levers and associated electrical contacting apparatus, unit I22 may correspond in all respects thereto so far as the conventional feeler levers I24 are concerned, special feeler I23 being simply an additional member and having an additional pair of contacts with separate contacting points represented by the rectangles I25 and I26. The cable I28 contains five lines, each connecting one of the feeler lever contactors I24 with its associated segment in distributor ring I29. A conductor I3I connects special feeler contactor I23 with one terminal of the winding of a polar relay I32; Continuing from the other terminal of polar relay I32 is a conductor I33 leading to a special segment I34 of a distributor ring I35 adapted to be bridged by a pair of brushes grounded ring I31.

It is to be noted that the aforementioned segment I34 aligns with and corresponds to the distributor cyclic period coincident with the conventional start segment I38 of distributor rin I29 and that this cyclic interval is in advance of the first one of the five permutation code segments of ring I29. For this reason, it will be observed, the operation of relay I32 will occur in advance of the time that brushes I39 encounter said permutation code segments of ring I29. Thus, the transfer operation on the part of relay I32 is made to occur during a no-current interval of the line conductor I48 (segment I38 having no connection with any of ,the feelers) and there is in this way prevented the possibility of foreshortened or clipped impulses, a result which might not be avoided save through the utilization of a neutral interval during which to exer- I36 with the .-cise the current reversal.

The normal position of tape feelers and their associated contacts I23 and I24 may be disposed in the manner illustrated in Fig. 9; that is, with their contacts engaging terminal blocks I25 and 'spective segments of ring HI. Accordingly, when presented against the surface of the tape, said contacts I23 and I24 seek to engage the contact blocks I26 and I21, those encountering perforations being permitted to do so and accordingly connecting their re- I29 with block I21 which, in turn, receives current potential over a conductor I42, contactor I43 from one or the other of a pair of opposite current sources I44 and I45. Those not encountering such perforations, how ever, will, during the critical portion of the signal transfer, fail to obtain current and hence cause to be conditioned their respective segments of ring I29 without electrical potential or with no-current.

Relay I32 being of the polar type as already mentioned, its armature I43wi1l move to the right or to the left engaging the contact points I48 or I41 in accordance with the nature of cur rent coming overconductor I3I from contactor I23 which may engage positive current block I26 or negative current block I25. When placed in either of its positions, armature I43 remains until altered by an opposite polarity introduced into the windings of its relays I32. Accordingly, it will be understood that the presence or absence of a sixth perforation will correspondingly impress block I21 with positive or negative current and that on this account, permutation code signais generated over the segments of ring I29 may be either positive and no-current or negative and no-current and that they will accordingly be issued out over line conductor I48.

At the receiving station, there is connected to line conductor I48, in series, the selector magnet I49 and a receiving polar relay I5I whose armature I52 will engage or withdraw from its contact point I53, depending upon whether the marking impulses of the received signals are of positive or negative polarity..- In accordance with the move ments of armature I52, operating current will be introduced to or withheld from the winding of a secondary shift control magnet I54, over an obvious circuit, Fig. 9.

A bell crank armature I55 pivoted at I56 and responsive to the energization or nonenergization of magnet I54 actuates an intermediate bell crank lever I51, resembling in'appearance and operation the bell crank lever IBI discussed in the preferred embodiment above. The actual relationship and position of hell crank lever I51 is as illustrated in Fig. 10, whereat its vertically extending arm engages a projection I58 integral with the horizontally shiftable bar I59 whose interponent lug I6I corresponds in appearance and operation to the lug 9| of the preferred embodiment.

Bar I59 will be supported in the same manner as bar of the preferred form; that is, by a shiftable plate, such as plate 52, and will be capable of responding in the same manner as the other member. Likewise, a lug I62 corresponding to the described. lug 89 will be provided and will also be carried by said shiftable plate, the two lugs I6I and I52 to function under the control of bell crank I51 in a manner and for the purpose already described in the preferred embodiment.

Since the operation of secondary shift control magnet I54 by the current characteristics as aforedescribed need not be established except during any one impulse of a signal, and since the most favorable opportunity for executing the performance (energization or release) of said magnet I54 is coincident with the stop (R). impulse interval, means have been provided for shunting the supervisory polar relay II 15.0 i-thateit may not fluctuate except :duringthe precise interval coincident with .the stop signal impulse. This supervision is exercised by .a special cam carrie'd upon .the distributor shaft I50 which, acting through a follower lever, causes the contact pair I50 .to come ajar during thedistributive interval coincident with the stop impulse, thereby removing the shunt ground from a local circuit as shown in .Fig. v9 cutting into circuit relay .I'5I together with magnet I49 and .permitting both members to respond to the stopimpulse. .Atsall other timesin the distributive :cycle, however, the apex of said cam of the distributor shaft I60 is withdrawn from the follower lever permitting contact pair I50 toengage and to therebyeffectively shunt relay I5I outof the signalresponsive circuit. I

It is to be understood, therefore, that the modified showing of Figs. 9-and l0,illustratesanother manner of controlling the functioning ofasecondary shift control structure but, in this :case, under the supervisionof a five-unitcode instead of a six-unit code as contemplated in thefirst described system. A shift characteristic for the purpose of supervising a-secondary type wheel shift function hasbeen-embodied into the standard five-unit code by alternating the current characteristic of the market impulses between plus and minus, the spacin'g-impulsesbeing :in all cases nocurrent.

Second modification In Figs. 1-1 and 12, there is illustrated a further system of printer controland line transmission for utilizing the five-unit-Baudot code signal in such a manner that it will afiordsix-unit signaling possibilities. Other manners of accomplishing this result have already been disclosed in connection with the embodiments described above, as by providing-means for supplying two currentconditions-for the marking impulses.

In the manner of signaling contemplated in connection with the present-embodiment, there is employed a five-unit "Baudot type codecombination signal having, in addition to the conventional five selective impulses, 'a special impulse utilized for supervising secondary shift control and astart impulse interval of a polarity opposite to that of;-its preceding or-special impulse interval, under the specific contemplation of the five code-combinationimpulse interval.

In other Words, whereas conventional fiveunit permutation code signals being provided with seven componential impulse intervals contemplate start and'stop impulses of predetermined and invariable line characteristics, -means are herewith provided for varying the characteristic of the stop signal interval so that in accordance with its electrical nature it may have utility for determining case selection as well asfor phasing supervision by maklngthestart initiating apparatus responsive to a startlimpulsecone dition of electrical polarity opposite to thatof the immediately preceding stop impulse interval which, as has been said, may consist of either one of two alternative line conditions.

In the incorporation of this plan of operation,

I it has been found expedient .to utilizeplusand minus current conditions to represent marking and spacing instead of the conventional practice of utilizing current and fno-current-conditions for this purpose. Moreover, as in :thecase ofthe first modification, Figs. 9 and .10,v there will .be utilized for the purpose of .signalitranslation a.

i e er sensing apparatus generally indicat d by titre reference character I '1. I qReader mechanlsm I 11 .-.is1illustr,ated as having seven contactors I12 to 11.8; however, contacts I11 and I18 both are carried upon a singlefeeler lever while each of the remaining contactors 112 to I1B, inclusive, is-carried individually upon alfeeler lever.

Inaccordance with theoperation of its feeler lever, each contactor is spring urged so that .it will engage the contactiblock towards. the right and is capable of movement in anoppositedirection so as to engage the contact block towards the left, ,as illustrated in Fig. 12. The contact .block at the right is comprised of a large section indicated I19 and a smaller section insulated therefrom indicated I8I. The contact block at the left is similarly comprised of. two sections, the larger one indicated I82 and'thesmaller one I83, -More'ovenas may be noted the .small con tact block I83 is connected electrically over an obvious conductor with the large contact block I19 and correspondingly small contact .block I8I is connected electrically with the large contact block I82. Opposite sourcesof grounded poten tial indicated I84 and I95 are connected respectively t0 the contact blocks 159 .and .I8I over conductors I86 and 191 to :the oppositely placed contact points of armature I88under the control of a polar relay I89.

The winding of said relay I89 is connected at one end to the aforedescribed :feeler contactor I18 andat its other end toa distributor segment I9I situated in distributor -ringxl92. This distributor I96 whichincludes-also distributor rings I93, I94, and 2I95isof the start-stop type having a brush carrier 1.91 which supports two pairs of bridging wipers I98 and I99. Brush carrier I91 of transmitting distributori96 is conventionally illustrated in'Fig. 12, but itis to be understood that this elementis :driven through a friction coupling preferably in'a rotary direction and that it may be restrained :from movement by the intervention iof'an armatureiZUI 'under the supervision'of start magnet 202. .Also, that the pa'ir of wipers I98 serve to connect segmented distributor ring I93 with the solid distributor ring I94 which is electrically connected to line conductor 283, andthatithepalrof Wipers I99 correspondingly connect distributor ring I92 which contains thesegment I9I aforedescribed with the grounded ldiStIibllliOI ring I95.

Attention will now be given to distributor ring I93.:which,.as.may.beobservedin Fig. 12, is made up .of seven segments. When the brush carrier I96 is'in its arrested position, wiper I98 iscontacting the slightly longer segment designated- 5 in the distributor ring I93. Also, it maybe ob served that following the segment 5whi'ch serves also in the capacity ofla stop segment --as will later be described, .there :is encountered a start segment designatedby the characters. 1

Following this segment is one designated 0 (zero), which has been arbitrarily assigned to the function ofsupervising .the secondary shift. This control'isotherwise executed, inaccordance with the present embodiment, .ina manner generallysimilar to ithat described above in connection with the preferredembodiment.

The remaining segments I, 2, 3, etc., including connected over a-iconductor- 204' to the feeler 11-1.-

Se ment .5 ;1's connected over a conductor .205 to the armature I88 of polar relay I89. Fig. 12 illustrates diagrammatically transmitting station equipment including a perforated tape controlled mechanism and a rotary signal transmitter under the supervision thereof for issuing signals of a type adapted to exercise the control function including primary and secondary shift supervision for printing apparatus having mechanically the characteristics exemplified in the showing of Fig. 11.

As the brush carrier I91 proceeds in the downward direction as indicated by the arrow 280, the pair of wipers I98 leave segment No. and encounter segment S bridging this element of distributor ring I93 with the solid line ring I94. Assuming, for the sake of illustration, that the "perforated tape signal which has just been positioned and which has been impressed upon the feeler levers of record reader MI is such that contactors I11 and I18 (which operate in unison) are moved to the" right, that is to say, with contactor I11. engaging block I19 and contactor I18 engaging block I8I, distributor segment No. 5 will have received positive current potential from grounded battery I84 over conductor 204. This circuit is traceable from positive battery I84, segment I83 to segment I19, feeler I11, conductor 204, segment No. 5 of distributor ring I93, brushes I98 to outgoing line ring. I94 which is grounded at the receiving station. As the brushes proceed to the next segment which is designated S, opposite polarity is issued from grounded battery I85 if polar rela I89, in accordance with its preceding operation, has been left in a position whereat its armature I88 engaged the contactor of conductor I81. This circuit is traceable from negative battery I85, conductor I81, armature I88, conductor 205, segment S of distributor ring I93, brushes I98 to line ring I94.

If instead of the supposed example described above, the particular signal had been one in which the feelerlever with which contactors I1! and I18 are integrally associated was positioned to the left causing engagement with contact blocks I82 and I83 instead of contact blocks I19 and I8I, the electrical characteristics relative to segments 5 and S would be opposite to that just described. With the brushes I98 passing over segment 5 negative potential would be supplied from grounded battery I85, segment I8I, segment I82, feeler I11, over conductor 284 to segment No. 5. Likewise, positive current would be supplied from grounded battery I84, conductor I86, armature I88 of polar relay I89, which has been energized to its opposite position, conductor 205 to segment S of distributor ring I93. Each of the feeler contactors I12 to X16, inclusive, is connected over an individual conductor with an associated segment 0 (zero) to 4 of the transmitting distributor ring I93. Accordingly, when a feelerlever encounters a perforated position in the tape, its contactor will be moved into one position, say the right-hand one, engaging the contact block I19 while its said feeler lever encounters a, nonperforated position and its contactor will assume an opposite condition; that is, contacting the opposite block I82. The designation of plus or minus signals to correspond with perforated or nonperforated signal components is arbitrary, and it is to be understood that the reserve association is equally feasible.

The foregoing is true not only of the conventional five feeler levers of contactors I12 to I16, but also of the special feeler lever with which are associated two contactors. I11 and I18, as has already been mentioned. One significant difference, however, does prevail which will now be noted. In the case of the special or sixth feeler lever, when a perforation is encountered and, say both contactors are moved to the right, contactor I18 will be introducing negative current from battery source I to the winding of bias polar relay I89 while contactor I11 will be introducing positive battery from source I84 over conductor 204 to the stop segment 5. Conversely, with the contactors I11 and I18 in the opposite position, that is, engaging contact blocks I82 and I83, positive current originating from source I84 will be introduced through feeler I18 to the winding of bias polar relay I89, while negative current originating from source I85 Will be introduced over conductor 204 to stop segment 5. Accordingly, since armature I88 of relay I89 is connected to the start segment S, the result of the operation of the sixth or special feeler lever will be understood as one controlling the reversal of potential for start segment S, that is to say, with a given condition on the part of segment 5 which may be either plus or minus the sixth feeler lever controlling contactors I11 and I18 operate to provide an opposite current potential to the start segment S.

The purpose in having provided polar relay I89 with its armature I88 connecting plus or minus current to the segment S instead of directly connecting the contactor I18 to said segment S is one of permitting the start impulse signal interval to be stored. The transmitter utilized is of the well-known magnet type wherein a new signal is sensed during the start interval. If a new signal should be sensed which would cause the feelers I11 and I18 to move to their opposite position the start impulse would be of the same.

polarity as the stop impulse. However, by provicling the polar relay I89, the armature I88 will be held in a position whereby potential opposite to that of the stop segment 5 will be assured, as the armature I88 retains such position until the brushes I98 have passed the start segment S, or until brushes I98 sweep across segment I9I of ring I92, thus providing a grounded circuit for the polar relay I89. At this time the armature I88 may move to the opposite side if the feelers I11 and H8 have moved, but the start impulse has already been transmitted. 1

In Fig. 12, the reference character 205 designates a receiving station and within said outline are contained the symbols representing vital apparatus responsive to the signals generated by the transmitting distributor I96. Of these, the reference character 201 denotes a bias polar relay whose armature 208 is grounded, and is adapted to reciprocate between two contact points 209 and El I which are part of a local circuit for supervising the operation of principal control magnets 2I2, see also Fig. 11.

which is one of an assembly carried upon the dis tributor cam shaft 18, see also Fig. 1. Also carried on shaft 18 as an integral part of the aforedition' to thecams already-designated in the assembly .carried by shaft 18 is one indicated' 226,

having :a plurality of :spacedapice's, which when said cam assembly is rotating, serve torock the armature bell crank '22-! about its pivot 223 for the purpose of presenting-its magnetically attractive arm 229 againstthe polar face of magnet 212. This operation 1 of cam 225 m assisting the armature 227 and thereby diminishingthe work of magnet 212 is inaccordance with recognized practice in printing telegraphy. 1

As illustrated in Fig. 11, storage lever 1 115 is disposed below the other storage levers '-2-31 and 232. This arrangement is in a general sense arbitrary for the shift signal impulse, in the particular instance corresponding to 'thesegment on the distributorring 193, Fig. 12,may be'located if preferred in-any other-position withrespect to the componential sequence both in the-distributor ring 193 aswell as'in the stacker-"selector storage 1evers,-Fig. 11, designated 105, 23.1, and 232. Storage levers' 23'2 are five in number corresponding to the signal components which utilize the segments -1, 2, 3, 4, and 5 in the transmitt'mg distributor ring 193. Storage lever 231, together with the top "one of levers 232, correspond to the code signal'impulse occupiedby the segment 5, and in the'order designated :each impulse ultimately serves to place'its associated lever .231 or 232 in one-or anotherof its two possible positions as already described .inconnection with the preferred'embodim'ent.

For the purpose of understaridingthe principles of the instant improvement, it will sufiice to state that ultimately the storage signal 'is'rn'an'ifest by a conditioning of the several "storage levers 105, 231, and 232 with thelever I05 exercising the function of controlling secondary case shift bell crank llll andlevers232ifunctioning to condition the set of code discs 234 which are five in number.

Storage'lever 231 controls'the shifting of abovementioned contactor 213. -Accordingly, when it is,.found inthe position as illustrated in Fig. 11, it .permitsvcontactor 213 to engage its upper contact 21.9, and when it is'in an opposite condition such as that occupied .by .thecounterclockwise extreme storage lever 2'32, in Fig. '11, said lever 231 by its protuberance 235 will engage the insulated extremely of contactor 213 and thrust the latter member. so that .it will disengage contact 219 and engage contact 218 instead.

A supervision of contactor 214 is .had byfollower lever arm 221 under thec-control of cam apex 223, that is, when apex223 is in the position indicated, contactor 214 is thrust against-its 1 left contact 215 but at' all other times; thatis,

when-apex 223 is clear ofthefollower arm 22 1, contactor 214 ispermitted through its own sprin tension to recede from-contact point 2=15 and to en age instead .contactpoint 211i. llhere will new bejdescribedithe efiect. of the supervision iii oontactors 213 1and 2'14 by v the above-described apparatus.

:Let it be assumed for. the sake of illustration that' aiparticular code'signal transmitted 'over distributor 196 .is comprised'ofa certain combination of code-impulses Whose fifth component (there being a total of six components including 0) is-constituted of marking characteristics-that is, the current characteristic which will position, its sword 233 in the manner-opposite to that indicated in Fig. 11 so as to place storage'lever 231 in the positionopposite to that indicated inthis illustration. Accordingly, contactor 213 will be permitted to recede from contact point 213"(assuming that a preceding signal'difiered in-respect to this signal component) and: to. engage instead its-contact 218. Thiswill correspond also "toithe placement of contactor 214,as illustratedin 'Fig. 12. In order to produce this result, the nature of the signal impulse will-be such. as toefiect 'the polar relay 201 to cause it to move its, armature 2113 to engage contact point 211so astogcloselthe circuit for selectormagnet 212 and .to cause the armature lever 236, Fig. l1, to assume is marking position. Subsequently, there will follow the start signal impulse whose effect uponrelay 201 will .be-opposite tothat just-described in connection with the No. 5 signal impulse, which reversal is assured by the apparatus of the transmitting distributor described-above. In consequence,relay armature 208 will bemoved:counterclockwis to engage itscontact point 209, as 'illustrated i n Fig. l2'opening thecircuitior energizingselector magnet 212 and thereby releasing the-selector apparatus 'for a given cycle.

Under the alternative conditionof operation, that is, with the No. 5' impulse being of spacing nature, contactor 2I3 Will be withdrawn from contact point 218 and'thrust into engagement with'contact point 219. instead. As describeddn said copending application; referred to above, cam shaftw18 carries in' addition to :the aforedescribed operating cams 223 and 226, a spiral distribution of cam apices indicated 230, fivein number. Each one-of these is "related toone of the signal impulses '1 to "5, inclusive, whose corresponding segments "appear inthe distributor ring 193, Fig. 12, while the final one-ofsaid series speciallydesignated 230A, Fig. 11, is in accordance with the present embodiment, of'double width.

This'is'so because'unlike the otherof the-cams 2311 which serve to-actuate but a single one of the claw levers 224, it alone-actuates 'a pair of said claw levers 224. Since said levers "224-.are all of the same contour, they 'maynot be dife ferentiated in the showing of Fig. 11,, however, on account of the spiral arrangement of said cams'230, each claw lever'224 will. be operated at a particular cyclic interval, except saidtwo claw -levers224 which are operated in unison by 'the locking projection by being placed on one side or the other of a locking bail 241, which member assumes the position indicated in Fig. 11,except during a brief interval following the conclusion of a particular signal when its lever arm 242 is released by the operation of the aforedescribed auxiliary shaft '16.

Accordingly, while the several swords 233 and 233' may assume one position or the other as its abutment 242 or 244 encounters the downwardly extending vane 245 or 246 of armature 236, levers 231 and 232may not be correspondingly positioned until said swords 233 and 233' are thrust downwardly by the clockwise movement of the claw levers 224, which movement is urged by their individual springs 241 as well as by auxiliary individual springs carried upon an integral extension of lever arm 242.

The auxiliary springs of lever arm 242 are not shown in Fig. 11 of the accompanying drawings, but reference may be had to the aforedescribed copending application where it is explained that their function is of an auxiliary nature and to assist the principal actuating springs 241. None of the springs 241 or the auxiliar springs mentioned may actuate their associated clawlevers 224 during the time that the locking bail 241 intervenes by blocking the extending portions 239 of levers 232. However, since lever 231 is not provided with an extension 239 as are the remaining ones of the levers designated 232, its response to its associated sword 233 will occur immediately following the instant when cam apex 230A passes the follower projection of claw lever 224 which carries said sword 233'.

Thus, while the consummation of a signal transfer relating to aparticular set of code impulses of any signal must await a brief interval following the fifth or stop code impulse, the actuation of contactor 213 by the projection 235 of*specia1 storage lever 231 follows immediately upon receipt of the fifth code impulse. This assures the operation of selector magnet 212 for the purpose of arresting the rotation of shaft 18 coincidentally with the signal interval corresponding to the stop or fifth code combination impulse, even though the other purposeof the particular impulse, namely, that of setting one of the code discs 234, may await its regular period of operation which, as has been said, occurs after the lapse of a brief time interval and, in fact, during the occurrence of a succeeding code combination signal.

Cam apex 223 is specially provided for the purpose of actuating the aforedescribed arm 221 which, in turn, controls contactor 2 I 4. Cam apex 223 is effective to thrust contactor 214 against its contact point 215 for a period commensurate approximately with the beginning of the stop or No. 5 code combination impulse and continuing "through the start impulses and to then (zero) or shift controlling impulse. At other times contactor 214, see also Fig. 12, engages its contact point 216 for a purpose which will now be described.

Operation of the second modification Concisely stated, armature 208 of relay 20'1 fluctuates in accordance with each signal impulse, contactor 214 being controlled by cam apex 223 rests against contact point 216 at all times except during the stop and start signal interval, and contactor 213 being controlled by the No. 5 or stop signal is moved into one or the other of two alternative positions as-a result of the operation of the transfer mechanism, describectabove, only during the period corresponding to this impulse. Under an assumed set of conditions, in response to marking signals, both armature 200 and contactor 213 will be deflected downwardly, that is, to engage their contact points 211 and 218, while under spacing signal impulses, said armature and contactor will be in their opposite position, that is, engaging respectively their contact points 2119 and 219. Also, it is to be recalled that since the No. 5 impulse functions in a dual capacity of effecting the distributor stop control as well as of entering into'the permutation code,

each cycle must be considered as including a part of the preceding No. 5 impulse, which affects the current characteristic of the start impulse as well as of the concluding No. 5 impulse, because it, together with the impulses 'Nos. I, 2, 3, and 4, comprisesthe code combination of the particular signal.

Accordingly, when the No. 5 impulse of a preceding signal happens to be marking, armature 208 will be thrust into engagement with its contact point 211, contactor 214 will be thrust into engagement with its contact point 215 (on account of the operation of cam 223) and contactor 213, as a result of the transfer operation, will be moved into engagement with its contact point 218. This will complete a circuit traceable from 213 with which it is then in engagement, conductor 253, contact point 211, and its armature 200 which is then in engagement with it to ground. As a result of the continued energization of magnet 212, its armature is held and the rotation of shaft '18 is arrested in accordance with the conventional operation of printing telegraph selector shafts. This condition continues until the circuit for energizing 212 is broken, which change occurs upon the rece-iptof a proper start impulse over segment S of transmitting distributor ring 193. The polarity of the start signal being opposite to that of the No 5 or stop signal impulse, as already explained, causes armature 208 to be moved to engage its contact point 209'and away from its contact point 211. This interrupts or opens the circuit for magnet 212, causing the release of its armature 236 and consequently initiating the rotation of receiving distributor shaft '18 in a manner clearly described in the copending application referred to.

As distributor shaft '18 rotates, cam apex 223 rides off the projection of arm 221 permitting contactor 214 to be drawn away from its contact point 215 and to come into engagement instead with its contact point 216, meanwhile contactor 213 remaining in engagement,with its contact point 218 because it can be changed only during the occurrence of the fifth impulse, As a result of the change incontactor 214 from contact point 215 to contact point 215, no effect is obtained at this time, magnet 212 continuing to be deenergized until during the course of the succeeding six signal impulses, 0, 1', 2, 3, etc., armature 208 in response to its relay 20! returns to engage its contact point 211, which response can occur only under the control of marking signal impulses.

In the event that a marking impulse is received during the 0 (zero) impulse interval, the action of one of the swords 223 upon the storage lever will cause bell crank 101 to be rotated clockwise in a manner and for the purpose already ture, the succeedingoperation will be the same as-the one just described except for the variations which may occur in the code combination, but if instead the signal impu sercorrespond'ingto the No. interval happens to be ofspacingrnature, then armature 208 will, respond by engaging its upper contactpoint 209 and sword v233' willbe disposed in the manner illustrated in Fig, 11. As a result of the latter incident, cont actor 2l3 will be permitted toengageit upper contact point 2I 9 instead of the lower contact point 2|8, while on account of cam apex 223, contactor 2 will again be thrust against, contact point 215. Thus, a circuit will be completed for energizing the magnet 2I2 traceable from grounded battery through the winding of magnet, 212, conductor 252, contactor 2l3 which is then in engagement with its contact point 2l9, conductor .254, contactor 2| 4 and its contact point 2| 5, conductor 255, contact point 209 and its contactor 208 which is then in engagement with it, to ground.

As a result, magnet 2 I2 is held energized which is the proper condition correspondingto astop impulse until an opposite current condition is received 'by relay 20'! causing its armature 2018 to be withdrawn from contact point 209 and to engage instead contact point. 21],. When this occurs, contactor 2l4isisti1l held engagement with its contact point'zllibecause ofthe described function of cam 223, which maintains said condition until after the interval corresponding to the start, S, impulse. Meanwhile-the last described movement of armature 208 causes the energizing circuit for magnet 2lfl2'to be broken and accordingly releasing its armature 236'for the purpose of initiating rotation of receiving dis tributor shaft I8, as aforedescribed.

Thereafter and coincident with the ll-(zero) signal interval, apex of cam 223' restores 'contactor 2| 4 to its condition'prvalent during-the major portion of the cycle; that 'is,; engaging'its contact point 2I6. When this 'occursythat' is,

when armature 208- of relay 201 engage contact point 2, marking impulscs'arethereafter'interpreted as magnet 2I2 energizing'impulses because contactor 2 l3'continues in-engagement-with its contact point 2l9, causing the magnet '2I2 energizing circuit tobe completed over the following described course. The current originates with grounded battery 25I through the winding of magnet 2l2-, conductor 252,-contactor' 2l3,'and its-contact point "2I9,- conductor -254,-contaetor '2 I4 and its contact point-2N, conductor-253-, contact 2H and its contactor 208, to groundp Thus, phasing of the receiving magnet 212 as well as of its controlled shaft 18 isregulated notwithstanding the reversed condition-of the No. 5-and star-t impulses. I

While the foregoing description-has been explained and described with referenceto specific embodiments, it is not intended-tube restricted in any manner-torthe language :onthe detailed specification nor to.theillustrationsiinitheaccom Rall ing. drawin s;- except a indicated in .the hereunto appende'd claims; 4

What is claimed is:v

L In a,- telegraph transmission system,; a transmitting station apparatus comprising va transmit. tingdistributor having .a series of code signal impulse segments and a special segment, a tape sensing apparatus having a set of alternatively conditionable perforation feelers each one-associated with one of said transmitter segments, means under the control 'of each of said set of feelers for conditioning its associated transmitter'segment in a manner corresponding to its condition, and means ior vconditioning said spe-. cial transmitter segment in a manner reverse to that of one of saidcode segments. 2.-In-a-.tape transmitter, a transmittingsdis tributor havinga series. of impulse elements, ,a tape feeler unit having series of-tape feeler levers,.,meansunder the control of certain ones ofixsaid tape, feelerlevers ,for correspondingly conditioningcertainassociated ones of said transmitter elements-,; and ,means responsive to :the

operation of a certain; other on or said feeler' levers for simultaneously. conditioning aplurality of said transmitting elements. ina variable manner.

3. Ina telegraph system, ,the method of -sig naling which comprises generating sets of variable signal. impulses each having, alternative elec trical conditions, allocating all but one of said signal impulses to a permutation code, allocatingsaid one of said signal impulses to the function of initiatinga signal distribution release op,- eration, and determining. the electricalflcharacteristic .of' said oneimpulse to be invariably- 0pposite to. that. of .a certain impulse of its set.

4. c In a telegraph transmissionv system, a transmit't'ing station apparatus comprising a transmitting distributor having a series of code signal impulse segments and a special segment; a tape,

cial transmitter segment in accordance with a predeterminedcontrast." V 5. In a tape transmitter, a transmitting ,distributor having a series of transmitter elements, a 'tape feeler unit having, atseries of tapefeeler levers, means under the -control of certain ones of said tapefeeler levels for correspondingly-conditioning certain associated ones of" said transmitter'elements; and means; responsive to the operation of a certain' otherone of said feeler leversfor simultaneously-- conditioning; two; of said transmitter elements oppositely,- 6. In atransmission system,- a rotary distributor for issuing permutation code signals includ, in'g a sequence 0fcode impulse 'segmen-ts and phase regulating-segments,sand means under the control :of the last code impulse segment :of. .the sequence for determining; the electrical nature-of anensuing phasesregulatinggsegment;

7. In a transmission system according toclaim 6, a tape sensingapparatus comprising feeler levers positionable according to perforations in a control:.,form, ccntactorsz-ipositionable "according td;,-said feelers;and peach;-v electrically associated ith n of: said distributor segments; and are.- 1ay-,;under; .the contro or the; last; vcodey impulse se ment oft-said; senesccmprisin :sa dme nsifor eterminin theselec ri alz na ure Qf.. ensuins nhaseizesulatinsasesment v v 8. In a transmission system, a set of feelers for sensing codal perforations of a control form, a feeler for sensing a shift perforation in a' control form, a contactor associated with each of said feelers and movable therewith to engage predeterminedly related current potentials, a further contactor mechanically associated with one of said codal perforation feelers to move to engage said current potentials in an opposite manner, and a distributor including a set of elements each electrically connected to one of said feeler contactors and said further contactor for generating signals constituted of impulses of current potential according to said engagements of said contactors.

9. In a transmission system, a rotary distributor comprising a series of segments, some relating to cyclic phase regulation, some to essential signaling code, and some to case shift controlf a record reader including a series of contactors each connected electrically to one of said distributor elements, two sources of electrical signaling current disposed to be engaged by the contactors of said essential code and said case shift control elements under similar conditions of operation and said phase regulating contactor under opposite conditions of operation, and means for compelling the contactor of said phase regulating element to perform in a predetermined relation to the operation of one of said essential code contactors.

LOUIS M. POT'IS.

Images