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Feb. l, 1938. |__ Ml POTTS 2,107,044 TWO-COLOR RIBBON MECHANISM Filed Aug. 5, 1936 2 Sheets-Sheet 2 ,INVENTOR LOUIS M. POTTS ATTORNEY 2,107,044v Patented Feb. 1, 1938 UNITED STATES PATENT. ori-fica 2,107,044 TWO-COLOR RIBBON lWECHANISM Louis M. Potts, Evanston, Ill., assignor to Tele type Corporation, Gliicago, lll., a corporation , of Delaware Application August 5, 1936, lSerial No. 94,350, 12 Claims. This invention pertains to printing telegraph systems and apparatus and more particularly to apparatus for recording in different colors mes sages transmitted and received. 5 The principal' object of the invention is to pro vide, in a combination transmitting and record ing apparatus, a simple and inexpensive mecha nism responsive to the transmitting apparatus to function differently under conditions of trans 10 mission and reception whereby transmitted and received messages will be distinctively recorded. Another object of the invention is to provide for the oscillation of the inking ribbon capable of printing in distinctive colors to afford visibility of the record irrespective of the positionl of the platen, and to vary, under the control of the transmitting mechanism, the extent of such os cillation. The above and other objects of the invention are achieved by rendering the‘ ribbon shift mechanism controllable by a cam associated with the keyboard transmitter so that the cam, during message transmission, will govern the shifting of the two color ribbo /mechanism auto d matically to effect printing i a certain charac teristic and distinctive color. During message reception, the cam remains quiescent and the ribbon shift mechanism is operated to a limited extent only so as to present the portion of the so ribbon employed for printing incoming mes sages. On the other hand, during message transmission, at which time a home record is made, the cam rotates cyclically, and once during each cycle the ribbon is oscillated a greater 35 amount than .during message reception to. present the portion of the ribbon employed for printing outgoing messages. Specifically, the present invention is arranged to be applied to apparatus such as that disclosed in Patent No. 1,904,164 granted April 18, 1933 to S. Morton et al., which relates to a combination A transmitting and receiving apparatus wherein the platen is stationary and the type carriage is movable. The ribbon shift mechanism, accord ing to the invention herein disclosed, is con trolled by a supplementary guide bar disposed C) (Cl. 178-25) ribbon into the path of the oncoming type bar. When the pull bar bail is restored after recipro cation, the ribbon yshift bell crank lever is caused to lower the ribbon out of the path of the type bar to render the printed record visible. In ac- 5 cordance with the present invention, the ribbon shift mechanism has been arranged to render it adaptable to use with a two-color ribbon, where in the elevation to which the ribbon is shifted by the ribbon shift mechanism is determined by 10 the colored portion of the ribbon from which a record is to be made. It is the function of the supplementary guide to control the amount of elevation of the ribbon, without affecting the visibility of the record after printing. Further 15 more, the portion of the ribbon shift bell crank lever which cooperates with the pull bar bail is _ designed so as to function similarly for print ing either- upper or lower case characters. A better understanding of the invention may 20 be had from the following description, taken in conjunction with the accompanying drawings, wherein .like reference characters designate simi lar parts throughout the several views, and in which, ` 25 Fig. 1 is a simpliñed circuit diagram of a tele graph system to which the present invention is applicable; Fig. 2 is'a transverse cross-sectional view of ' the printer in accordance with said patent in which the device according to the present inven tion is incorporated; _ _ Fig. 3 is a. cross-sectional view of the trans mitting mechanism; - ' Fig. 4 is a fragmentary plan view of the trans 35 mitting cam shaft; Fig. 5 is a fragmental view illustrating one of the operative positions of the device according to the invention; Fig. 6 is a plan view oi’ the printer according 40 to the said patent with parts broken away to show the application of the present invention thereto; » Fig. 'I is a fragmentalY cross-sectional viewI taken approximately on line 1-1 of Fig. 6 in which the arrangement according to the present parallel to the printing bail guide. The supple invention is shown in a position for printing mentary guide is rockable on its longitudinal axis to either of two positions dependent upon the operation or non-operation of the trans mitter shaft. The ribbon shift bell crank lever is controlled directly by the pull bar bail in such lower case characters of an outgoing message, manner that, each time the pull bar bail is re ciprocated to operate a type bar, the ribbon shift y lbell crank lever is rocked so as to raise the and . Fig. 8 is a fragmental cross-sectional view simi- 50 lar to Fig. 7 in which the present invention is shown in a position for printing upper case characters of an outgoing message. Having reference to Fig. 1 which is a simpli ñed diagrammatic view of a telegraph system to 55 2 , . _ atomo“ I E which theÍ present invention is applicable, the system’comprisesaloopcircuit Il interconnect ing two .telegraph stations ii and i2 which may have identical equipment. A Itmofmle., understood that other stations may be included inthisloopcircuit. Station il issbownascom prising a receiving portion il, including a line relay il, and a transmitting-portion il, includ ing a transmitting 10 operated when the transmitting contacts it. at any of the stations included in the loop, are operated. I > 'I‘he particular embodiment of the invention shown comprises -a printer mechanism such as is shown in U. S. Patent No. 1,904,164, a_ trans mittingmechanismsimilartothatshownin 20» rolleruenglsesthelowpartofcaml. distributor indicated Umboli- ' cally by the transmitting contacts il. From'this circuit itlwill be seen 'that tbeline relay Il is "is of cam Il. tative movement is 4terminated when the cam“ continues to rotate, theroller u up onto the high part of the cam 4i to-be'rotated through-lever I! I. in a clockwise direction against of spring Il. '- ` Printing bail ".is provided with a pair -blades "which are spaced apart to pro de -a guidcway'for a roller Il carried on a pull bail Il. Through this interconnection, movement of bail 4| is imparted to the p'ull bar U. B. Patent No. 1.595.472, and a shifting mech anism for the colorribbon particularly adapted for cooperation with these mechanisms.. The unit comprises a base il for mounting of the printer and the keyboard transmitter. 'ihe printer is driven through a mainshaft il, Figs. 2-and 7, and the'transmitter through a main shaftìi (ii‘ig.4)bothshaf_tsbeingdrivenin drop therein, causing shoulder Il to cooperate _withedgellofthepullbarbaillls‘othat u the reciprocation of bail ll, the pull bar actuated to the left to cause. through the and gear relationship'therewith.“ a to be rotated clockwise sharply lîlinst the platen Il. -As the type bar Il is operated, the any desirable manner from a‘ motor (not shown). > Referring to ~Figs. 2 and 6, the printing appa ratus to which the present invention is applied 30 comprises a typing unit (shown generally in sec /inking ribbon Il isautomatically interposed be-- tion in Fig. 2) which includes a primary select ing mechanism (not shown) controlledby the line relay il and a >secondary selector or selector' vane assembly indicated generally as `22. 'I'he 35 selector vane assembly llcontrols, through a series of bell crank levers 28,'a corresponding series of arcuatecode bars Il carried in a mov tween the type face and platen, and after the printing is completed and the type bar is ,re turned to its lmoperated position. the ribbon isagain withdrawn, exposing the printing record ' to view. The ribbon Il is carried in a ribbon ss guide member Il which. in turn, is 4carried at the end of the horizontal arm of a ribbon shift bell crank lever Il which is pivoted at ll‘to 1,904,164, this type-carriage. indicated generally ' 40 as 2l, is movable longitudinally with respect to a one end of a lever Il, which in turn is pivoted at O2 to a bracket I3 integral with portion“ of able type carriage. Asset forth in Patent No. n stationary platen Il, on rollers 21 and” co operable with track members 20 and Il respec tively. The type carriage 2l also carries a rib the framework of the type carriage 2l. Lever Il, between pivotal points l! and l2, is designed to carry aroller Il which is adapted to-have bon supply‘and said mechanism indicated gen- ' contactual relation with the bottom sideof a rail 45 A' spacing mechanism (more fully in Patent No. 1,904,164) is associated main shaft il and controls', v'through and Il, shaft Il,v gear „and rack I1 described with the gears Il (Pig. 2), 50 the movement of type carriage 2l to form char `acter spaces, tending in this movement to wind 'up the carriage return spring mechanism indi cated generally as 3l. y Positioned in operative relation with and par 55 allel to the main operating shaft il is an auxil iary shaft“ on which are carried various mech anisms, for example, the printing bail 4I and the printing bail operating arm I2. .The printing bailI-I is actuated by a printing spring I8 in .I l(carried onthe platen sssemblyll) dus to the action of a spring l1 distended between lever Il and a projection on bracket 0I. ' Spring t1 tends to rotate lever .I in a clock wise direction (as viewed in Fig. 2) about pivot 62 so that when the platen II is reciprocated be- - tween- its upper case and lower case (“letters" and “figures”) positions through the medium of rod H3, as described in Patent 1,904,164, vroller Il will constantly remain in contact with the rail ‘ ß and lever Il will thus be automatically re ciprocated vertically therewith. ' The depending arm of lever Il is operably associatedwiththepullbarbailllsothatthe reciprocative motion of bail Il will cause the os proper timed relationin the operative cycle and cilla'tion of bell crank lever Il about fulcrum is controlled by the operating lever ‘l mounted Il `whether the platen Il be in its “letters” or on the shaft Il. One end of lever l! carries a “ilgures'fpositiom Thus,.it will be noted that follower roller M which cooperates with a print when bail Il is in its normal position (shown in ing bail operating cam 4l carried on‘shaft il. l'ig. 2), the bell crank Il will hold the ribbon Il, Attheupperendofleverlliscarriedanad by reason of guide l1, in- its down or lower posi iustable striker Il which cooperates with print tion to eii’ect visibility f the printed ' Fbllower. roller u rides on the high part of the c_am 4I and in consequence thereof printing bail 70 4| isheldtotheright (asviewedinll'ig.2) by striker Il on lever Il. Printing -bail Il is con-~ stantly under the iniiuence of printing spring ß which tends to rotate ball 4i- in a countcrclock wise direction. Therefore, as the printing cam 75 Il -revolves it releases lever-'42, thereby allowing and when bail 4I vmoves toward the left for a printing operation. the ribbon I. will be raised to printing position dus toy the clockwise move ment of bell crank lever Il about pivot Il by 70 spring H2. ~ I_n accordance with the present invention, the amountV ci' vertical reciprocation of ribbon guide l1 is varied to compensate fo'll the particular colored portion of the ribbon from which _it is 75 2,107,044 desired to make a record; that is, when a two color ribbon is employed wherein incoming mes sages are to be printed in one color or from one portion of- the ribbon, and outgoing messages r v 3 carriage 25. It is thus observed that bell crank |04 is movable with the carriage 25 and is slid ably articulated to the wing bar 1|. The hori zontal arm of bell crank |04 cooperates with a _ are to be printed from the other portion of the .laterally disposed projection |09 (Fig. 6), of a ribbon, it is contemplated to control automati cally the seëagtàon of the portion of the ribbon used. To e ec' this control of the inking rib bon, a supplementary guide bar is provided which comprises a wing bar 1| which extends between brackets 12 4and 13 mounted on side frames, 14 and 15 respectively of the typing unit. The wing bar 1| is pivotally supported by means of pilot screws 16 and 11 associated with the ends there '15 of. By means of ' the wing bar 1| the ribbon shift control mechanism is effective ‘for every carriage spacing position of the type carriage 25. 'I'he wingbar 1| is rockable to 'two effective positions under the control of a cam 18, associated lever |01 pivotally mounted at |09 on the type carriage 25. Lever |01 rests upon the bell crank |04 due to gravity, or it may be spring actuated. - When the> wing bar 1| assumes its counterclock wise position, as shown in Fig. 2, -the bell crank |04 acts tohold the projection |06 of lever |01 in the path of laterally disposed projection | 09 of projection | || on the ribbon shift bell crank lever 58.y With this particular arrangement of levers | 04 >and |01 and wing bar 1|, the recipro cation of pull bar bail 49 during a printing oper ation will permit bell crank lever 58 to move clockwise a limited amount (Fig. 2) under the action of its spring ||2, or until projection |09 20 with the transmitting mechanism shown in Fig. 4. ' is arrested by projection |06 (Fig. 6), this move 'I'he transmitting mechanism as illustrated in Fig. 3 comprises a series of transmitting con tacts I6 which are controlled by- a corresponding ing. series of goose-neck levers 19 which in turn are for printing incoming messages in the lower case 20 ment being sufficientl to raise the ribbon 56 so~ that its upper color area is presented for print The foregoing is the organization of parts . 25 operated by a corresponding series of transmit- ` or “letters” position. ting cams 8|. Associated with the levers 19 are a set of blocking levers 82 pivoted on a -common In order to- print incoming messages in the upper case or “figures” position. the platen as shaft 83, the lower ends of which are articulated sembly 26 is caused to rock in a clockwise direc to individual code bars 84 which are permutably tion by means of a pull rod ||3, Fig. 2, in a 30 settable by means of key levers 85. Upon a pre l manner described in Patent No. 1,904,164. When 30 determined permutable setting of code bars 84 through the instrumentality of code notches 35 40 45 50 the platen assembly is so actuated, the roller 65 is caused to remain in contact with -therail thereon, the bars 84 will assume their right or 66 by means of spring 81, which causes lever left positions according to -the particular key 6| to rotate clockwise to raise the pivot 59, thus lever operated, which arrangement of the code raising the bell crank lever 58 a corresponding 35 bars 84 will effect a corresponding position of amount to bring the projection ||4 into align levers 82 to either prevent or permit, through ment with the projection |06 ofl lever |01, as shoulders 86, the goose-neck 1evers_19 to respond shown in Fig. 8. It is thus seen that the same to the cams 8| to control in turn, through thev _limited clockwise movement of bell crank lever contacts I1, the transmission of a character code 58 is obtained in either the upper or lower case 40 combination corresponding to the key lever-85 position of the platen for printing incoming depressed. y messages on the lupper portion of inking rib bon 56. , As described in Patent No. 1,595,472, the de pression of a key lever 85 also effects the release>Having reference again to Figs. 2 and 6, the of a throw-out clutch arm 81, whereupon a grab wing bar 1| carries a shouldered arm ||5 which clutch 88 is rendered engageable and operable cooperates in a manner hereinafter described through the continuously rotating shaft 2| to with a latch ||6 suitably pivoted at | |1 in the impart thereby, rotation to cams I6 and a gear printer frame. Upon rotation of face cam 18, 89 through a. single cycle. Associated with the during the transmission and printing of out transmitting ‘mechanism and arranged parallel going messages, the follower roller 98 will ride up 50 ontothe high portion thereof, whereby bar 91 will be actuated rightwardly against the action shaft 9| and the cam 18 carried thereon. Thus, _of a spring |03. The rlghtward movement o_f upon each actuation of key lever 85, Fig. 3, the bar 91 will impart counterclockwise movement to the shaft 2| is a shaft 9| which carries a gear - 92 meshed with gear 89 to impart rotation to 55 transmitting shaft 2| is rotated to eñect trans mission of a code signal, and simultaneously therewith shaft 9| is rotated to control, through cam 18 and a linkage to be presently described, the oscillation of the ribbon 56 to present the 00 desired colored portion thereof _ to the printing area. Cooperating withv cam 18 and mounted slid ably on bearings 93 and 94 carried on brackets 95 and 96, respectively, is a horizontal bar 91. 65 Mounted on the left end of bar 91 (Fig. 2) is follower roller 98 which cooperates with cam, 18. The right end of bar 91 is provided with a lat erally disposed portion 99 'which urges against the lower arm of lever |0| suitably pivoted at |02 70 in the printer structure. The upper end of lever |0| is forked so as to embrace the lower wing of bar 1|. The upper wing of bar 1|r cooperates with the forked end of a depending arm of bell crank 75 member |04 pivotally carried at |05 by the type to lever |0| against the action of its spring ||8 which in turn will cause wing bar 1| to rock clockwise to the position shown in Fig. 7, thus bringing the projection ||5 into a position to be Alatched up by the latch portion ||6, a spring ||9 acting to bring the latch ||6 into latching en 60 gagement with the shouldered portion ||5. As shown in Fig. 5, the actuation of wing bar 1| to its clockwise position causes bell crank |04 to be rocked counterclockwise so that its horizontal arm is lowered sufliciently to permit projection |06 on lever |01 to escape the'projectìon |09 on lever 58. Thus, when the pull bar bail 49 is actu ated leftwardly, the ribbon shift bell crank lever 58 will be permitted to rotate clockwise under vthe action of its spring ||2 a greater amount (than when it was blocked by projection |06) as shown in Fig. 7, so that the lower colored area of ribbon 56 may be presented to the printing posi tion for recording outgoing messages. To print outgoing messages in the upper case 75 saluto“ ' oti‘ullbarbail4l,nevsrtheless,ths-amo\mt movement olleverlliscontrolled llever-ll'ini'.oiihepositic'rislmvwniriFigJÍsoiihat I“ and Ill which the latel'llportion III toblockthemovement‘oileverllthroughitspro kwhenthelefvera'llland Illarecaussdtoassume 'iection Iller ill (dependingy upon whether'> theirrespeetivepoaitions,asshowninll'lg.'l,by fmtoprinunsnœiüom when .-. »» measagœaretob'eprinted?he transmittingcamshaftllisrotatedcvclicallrln reaponsetoeachoperationorakeylevertland: . _It f basbeenactuatedtoitsclockwisepositiomithas become latched in that position by the coopera tion 4of latch III withshouldered portion lll. By correspondingly. cyclicy movement is imparted - through sears Il and I2 (Fig. 4) tothe iace'cam 1I. thus for each cycle oi rotation ot cam ‘Il the wingbar'llisrockedthro'ughtheinstrumentality oi'barll andlever Ill.wingbar`|l beinglatched 4 in its clockwise position untilthe printing oi the character has been eil'ected, whereupon it is‘un latched by the lever I!! carried on the printing‘ bauu. mrœkingortnewmgbar-il'œm nismis elective upon the return of the printing 25 bail Il to its normal non-operated position to clockwise position each time a .key lever is de- ~ pressed and a character is transmitted causes, through lever I“, the shitting of the end or por tion- Il. from its blocking position to permit, _ through the escapement of portion I" or H4, a i'uller movement ci bell crank lever I8 to bring unlatch the member HI irom'the shouldered portion III to permit the wingbar 1I toassume its counterclockwise position due to the action ot the lower portion of the ribbon It into printing`spring lil on lever III. To‘eRectthisdisen-~ 30 gagement, there is provided on the printing bail It is, oi course, understood that this applica 4I.' a bracket ill onthe lower end of which is tion is intended to cover not only the speciiic em pivoted an arm i!! having a shoulder |28 (rig. bodiment disclosed but also sumcient changes or '1) to' cooperate with a depending portion |24 on modi?cations as come within the spirit of- the latch lil. Arm il! normailytendsto rotatein a invention or scope o! the following claims. counterclockwise direction toward the portion |24 what is claimed is: ' . n position. by a spring Ill. When the printing bail 4I as sumes its clockwise position, the shoulder |23 as sumes the position with respect to portion |24 'shown in Fig. 2, and when printing bail 4| is actuated to its counter-clockwise position, shoul der |23 is brought into eilective cooperative rela f . i l. In a telegraphapparatus. _a platen, a shitt able ribbon carrying mechanism, means to shirt and return the ribbon carrying mechanism'ir respective >of the podtio? of the platen to reveal the recordat the point of printing aftereach printing operation, transmitting means, and tionwitharm I24,asshowninl'lg.7,sothat means controlled by said transmitting means to whentheprintingbailllisagainreturnedtoits vary the degree of shifting oi the ribbon carrying mechanism. 2. In a telegraph apparatus. a movable type carriage, ribbon _carrying mechanism mounted III to become disengaged from the portion III to free thewingbarl'ltopermitits response through lever ill, to spring Ill. stantially concurrently therewith, lever |22 is de nectedbypinorstud III soastoeii'ectthe dis engagement ot shoulder |28 from depending arm |24 (Fig. 7). ¢ ' General operation ~ _ . theDuring transmitting the reception mechanism of incoming shown in Pigs.1 3 and 4 remains idle and the follower roller Il re sides in ëthe lower portion oi'l thelace cam 'Il thus permitting lever III, through its spring ill, tohoidthewingbarll inihcounterclockwise positionssahowninll'igaàandl. Uponre ceipt o! a code signal, therotation oi'the main shaft Ilisinitiatedinpropertimedrelation with the operation ofthe selectormechanism, as fully described in Patent No. 1,904,164. _"nie rotation ofshaft I! causes,throughcam4landoperating ann42,theprintingbail4i tobeoscillatedto cause, through' pull'bar bail Il, the operation of atypebarllto eilectprintingonthe upperpor tion ci the'inking ribbon It. -Because oi' the act that, although the movement of the ribbon on said carriage, means for shifting said ribbon, transmitting means, and means cooperating with said carriage and controlled by said ltransmitting ~ means to cause'said ribbon shitting means to op erate diii'erently when said transmitting means is operative than when said transmitting means is inoperative. ~ ` ' 8. In a telegraphsystem. a-telegraph line, a plurality of stations each comprising a transmit ting portion for sending outgoing signals over said linev and a receiving portion for producing a characteristic record of said outgoing as well as incoming signals, a carriage in each receiving portion movable to form character spaces, a rock -able guide member arranged parallelly to the path of movement oi' said can-lage, means asso ciated with said transmitting portion to control the degree oi' movement of said guide, and means . controlled by said guide for making the record oi’ said outgoing and incoming signals characteris tically diilerent. ` ' 4. In a telegraph apparatus, sending means, receiving means, a carriage movable in accord ancewithcharacterspaces,arockableguide memberarrangeciparalleltothepathotmove-A ment oi said carriage, means associated with said sending means to control the rockability ofsaid guide, and means continued by said guide for u bellcrankleverlliisgovernedbythemovement makingtherecords governedbysaidsending" 5 9,107,044 means and said receiving means distinguishable from one another. 5. In a recorder, a movable type carriage, a am of oscillation of the ribbon carrying mech a ribbon carrying means mounted on said carriage, Ul an intermittently operable member mounted on said carriage and adapted to perform the record ing operations, means- cooperating with said mem ber to effect oscillation of said ribbon to provide visibility of the record as it is made, and means 10 effective under certain predetermined conditions to vary the extent of oscillation of the ribbon. 6. In a recorder, a movable type carriage, a rib bon carrying means mounted on said carriage, an intermittently operable member mounted on said 15 carriage and adapted to perform recording oper ations, a shiftable platen, means to render said iirst mentioned means shiftable with said platen to maintain its cooperative relation therewith, means cooperating with said member to effect oscillation of the ribbon to provide visibility of the record as ~it is made in either the shift or un shift positions of said platen, and means effective in either position of said platen to vary the extent of oscillation of the ribbon. _ '7. In a recorder, a movable type carriage, mech anism in said carriage for effecting recording operations, a platen, shift mechanism for con trolling said platen, ribbon carrying mechanism mounted on said carriage, means mounted on said 30 carriage to perform recording operations, means cooperating simultaneously with said recording mechanism and said platen to eiIect oscillation of said ribbon irrespective of the position of said platen to provide visibility of the record as it is . 9. In a telegraph apparatus, a transmitting de vice. a recording device, a ribbon operating mech anism, a device to alter the operation of the rib bon operating mechanism, means operated-by the transmitting device to condition the ribbon oper ating mechanism for altered operation, and means eiïective after each recording operation to return the ribbon mechanism to its original con dition. ' 10. In a telegraph apparatus, printing mecha nism, a platen having a plurality of shift positions, ribbon carrying mechanism, means to effect oscil lation of the ribbon irrespective of the position of 15 the platen to provide visibility of the record, transmitting means, means controlled by said transmitting means to alter the operation of said first-recited means, means to retain said iirst recited means in altered position, and means 20 controlled by said printing mechanism to return said first-recited means to its original position. 11. In a telegraph apparatus, a printing bail, a ribbon supporting mechanism, means for mov ing said mechanism for each printing operation 25 in response to -operation of said printing bail, a transmitter, and means operated from the trans mitter for causing further movement of said mechanism upon operation of said bail to effect 30 printing in a distinctive color. - 12. In a telegraph apparatus, a printing bail, a ribbon supporting mechanism, means for moving said mechanism for each .printing operation in response to movement of the printing bail, a transmitter for transmitting signal impulses, a .35 35 made, land means' effective under certain oper operated in timed relation'to the transmis ating conditions to vary the extent of oscillation cam sion of signal impulses by said transmitter, and of the ribbon. 8. In a telegraph apparatus, a platen, ribbon mechanism positioned by said cam for causing said ribbon supporting mechanism to be moved carrying mechanism, means to effect oscillation an additional amount on the operation of the 40 of the ribbon carrying mechanism irrespective of' 40 printing bail. the position of the platen to provide visibility of the record, transmitting means, and means con- ' trolled-by said transmitting means to vvary the LOUIS M. POTI‘S.