US953090A - Ribbon-feeding mechanism for calculating-machines. - Google Patents

Description

0. D. JOHANTGEN. RIBBON FEEDING MECHANISM FOR CALCULATING MACHINES.

APPLICATION FILED JULY 27, 1906.

Patented Mar. 29, 1910.

2 SHEETS-SHEET 1.

W5 tn eases 0. D. JOHANTGEN. RIBBON PEEDIN G MECHANISM FOR CALCULATING MACHINES. APPLICATION FILED JULY 27, 1906.

953,090, Patented Mar. 29, 1910.

2 SHEETS-SHEET 2.

' ful Ribbon-Feeding Mechanism for Calcu 13' .lTEl) STATES PATENT OFFICE.

OLJIJEB D. JOHANTGEN. OF PHILADELPHIA, PENNSYLVANIA. ASSIGNOR OF ONE FOUR-TH TO JOHN W. DUNTLEY. ONE-FOURTH '10 J. FRANK JOHANTGEN. AND ONE- FOURTH TO WILLIAM O.'DUNTLEY. ALL OF'CHICAGO, ILLINOIS.

RIBBON-FEEDING MECHANISM FOR CALCULATING-MACHINES.

953,090. Specification of Letters Patent. Patented'Mar. 29, 1910- Orig-inal application filed January 19, 1906. Serial No. 296,880. Divided and this application filed July 27. 1906. Serial No. 3 28;025.

To all whom it may concern..-

a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and uselati-ngMachines, specification.

In a contemporaneously pending applicaof which the following a tion filed by me Januarylf), 1906. Serial No. 296,880, I have described and claimed in conjunction with my present invention, a novel and useful construction of a computing or calculating machine in which the number of working parts; employed is reduced to a minimum.

My present invention, which is a divism of the above mentioned application, consists broadly of a novelconstruction of a ribbon mechanism which may be employed to advantage in con JLInClllOll with any desired or conventional type ot' recording. or calculating machine. said ribbon mechan sm being so constructed that the ribbon feed is automatir-ally reversed when the ribbon is unwound or nearly unwound, from one or theother of its carrying or actuating members.

l t furtherconsi'sts of a novel.construction of a device fora ctu'ating the ribbon carr ing members. i

It further consists of a novelconstruction of ribbon carrying members provided with results, although it. is to be understood thatratehets, pawl. members co-a-ctlng therewith,

and means for automatically moving one or the other of said pawls into or out of operative relation with its co-acting ratchet wheel.

It further consists, of a novel construction of spools on which the ribbon wound and a novel construction of releasing mechanism the principal instrum'entalities of which my invention consists may be variously arranged Be it brown that 'I, OLivnn D. J on'im'rcnx,

and organized and are not limited to this specific ar'angementand organization.

Figure 1 represents on a reduced scale, a front view, partly in section, of a ribbon feeding mechanism for calculating machines embodying my invention, certain of the elervin'g spool seen at the right of Fig. 2. Fig.

b representsa side elevation of aportion of the reversing mechanism. F1 7'represents Fig. 3 repan end View in detached position of the rib bon carrying spool seen at the left of Fig. 2. Fig. 8 represents a perspective view of the body of the spool seen in Fig. showing also the means for securing the ink ribbon in place. Fig.9 represents an end view of the roll of the device, seen in Fig. 8 showing the ribbon secured in position thereon,fand the pawl bar seen in Fig. 4- being in section. Fig. 10 represents a side elevation, partly broken away, showing the device for actuating the ribbon mechanism. Fig. 11 repre sents aside elevation ating means I Similar numerals of reference indicate corresponding parts in the figures.

of the rock shaft actu- Referring to tli'e'drawings: In the present l instance Ihave shown the ribbon mechanism as being movably mounted in a suitable support or frame, although it will be apparent that this support or frame'willvary according to the'type of recording mechanism in v conjunction with which it is employed.

1 designates uprights or standards having at their upper ends, cross bars or supports 2 which carry the ribbon frame 3, which 7 55 merits being omitted for clearness of'illustrathe supports 2 ,for a purpose hereina ter de-;

latter is adjustably secured with-res ect tfo scribed.- v i v. a, 4 designateshanger-s depending from the ribbon support 3 and having" journaledtherein at a suitable. point a rock shaft v 5;

. shaftl5,the outer endsof saidarms having pivoted thereto the dogs or pawls 8 and 9 respectively, which are v adaptedlto engage at certain times withthe teeth 10in the ratchet wheel 11 or'w'ith the teeth 12 on the ratchetwheel 13. The wheel 11 is secured to the shaft 14 that carries the ribbon spool 15. The shaft 14 has loosely mountedthere-v on a shield 16 which is adapted at certain times to be brought inthepath of the dog or pawl 8 in order to prevent the latter from com ng into contact with the teeth 10. The shield 16 has pivotedthereto at 17 one end of a link or." bar 18" whose oppositeend is pivoted at 19 tOa shield'QO, which is loosely mounted on the shaft 21 of a ribbon spool e22 journaled i'n-thej ribbon frame 3. The

. parts are intl1e position seenin Fig. 2,

, is ada ted to fit in'a re link 18 hasisecur'ed thereto one end of a spring 23 whose opposite end is secured to a suitable fixed point as" 2-1 in or on theribbon names, it being noted-qthat. when the the spring 23 exerts a pull on the link 18 in the direction indicatedby the arrow a and for a purpose hereinafter described.

The ratchet wheel ll'has pivoted thereon at 25 'an-arm' 26 provided witlr ahook 27 and a bar 28, it being liotedthat said; ratchet wheel ,11 has anopening 29' therein through which the bar 28 may-be passed. Theb'ar 28 cess 30'infthe spool 15,-as est seen-in Fig. 7. Q p

The'spool 15' has aflattened 'portion 31 .thereon,-' as seen in, Fig. 7, upon which is a that said ratchet ba'rf40. ".Th'e ri bon s 001 22 is provided 'yvith a recess 42,-a s -in icated most clearly 'placed one. end 32 of the inking' ribbon 33 after which a stricp'34 is placed upon said v end 32 andsecur'e in l position on the s )ool 15' by screws or otherequivalents. The mking. ribbon 33 is preferably provided-with two or more colors of ink and-in thepresent instance'I' havefshown in, Figs. 8 and in a ribbon having a plurality of contrasting colors employed, onesuch as red being indicated. at 35; a"nd1one as black, at 36, whereby the printing may be done in two colors,

one of which may bevapplied to the individual-items and theother as the red tov totals or sub-totals The, ratchet wheelf13 has v pivoted thereon at .37, an: arm38, provided witha hook 39 andabar 40, as'seen in Fig. 4, it being noted wheel 13-hasan opening 41 therei'nuthr'ou h which may be passed the --m Fig: 8, adapted to receive the bar 40 carit ried by the arm .38, The spool 22'has a fiatdesignate arms secured to the" tened portion-T43 thereon upon which is placed the end portion i "of the ribbon 33,

' jsaid endportion'd'being'held in position on thespool 22" byaizstrip 45 securedI v-in any suitable manner tothespool 22. v

It will be, apparent. from] the. foregoing that, the manner: of attaching the ribbon to each spool'is substantially thesam and- I' have provided convenient, means for-is'ecuring and deta ching'the ribbon from its sup port. In the present instance I have shown the: pawl '9 as-b'eingprovided at its lower= end withan' ear or lug 46vto whichone end at of the spring 17 is secured, the other end fixed point such as 48, whereby the pawl 9 wheel contiguous thereto.

to be understood that'in some instancesthis spring may be dispensed with and thepawls 8 and 9 may be-so pivoted that they ,will normally by their own weight, engage their of said spring being secured to a suitable respective ratchet wheelsor the'shieldswith which r they co-act..

49 designates a 'washeror shield which is seated on the end, of the/shaft 21, it being understood that a similar member is-mounted von the shaft 14, these members serving as a guide for the ribbonand forming the ribv bon spools.

port 2 for-the ribbon and-through which the ribbon passes as it is beingwound or beingunwound from a spool.

51, designatesa rotatable. shaft having mounted thereon a caminember .52, which eo-acts with ne' e'nd53 of a bell crank, lever 50 designatesgnides carried} bythe sup- 54 suitably ulcru ned at 55, "while; itslother member'fiti is provided withcam slotsv 57 and 58 through-which are passed studs .59, which are'fseeured in a-link 60. The link 60'is pivoted-at 61 to a link 62 which. is securedto "the rock shaft 5, sothat when the shaft 51 is rotated, the, cam 52 will foo-act with the bell crank lever 54 and owing to the provision of the links 60 and 62, the i .sha'ft will 'be'rocked aswill be apparent.

The ribbon frame 3 is fitted in the frame 2, sons to beacapable of sliding therein and in the present instance the connection between themain frame and the ribbon frame consists in providingthe ribbon frame with slots 631throughwh1ch are passedthe screws or'bolts 64 that are screwed into the sup-- ports 2- of'the main frame, itbeing' noted C that the heads of said bolts 64 support the ribbon frame in positionin the'main frame.

65 designates a bracket depending from the frame of the machine, in which is rotatably mounted a shaft 66 on which is 72. it being, apparent that this pin or be "actuated in unison.

fixedan operating lever 67 provided with a presser piece 68, the. latter being actuated by'the finger or thumb of the operator, said lever being inte'gral with or fast 'upon said shaft, so that said lever and shaft will rock extremities of the shaft 66 are secured upwardly extending rock. arms .69, at the up per ends of wh ch are pivoted one end of links 70, the opposite ends of said links .being' provided with a hook 71 which is adapted to drop over'and engage the pin 7,2- is carried by the depending bracket of the ribbon frame 3.. so that when the parts are in their normal. position they will appear.

substantially as seen in Fig. 10, but upon a depression of the lever 67 the inking ribbon frame will be moved forwardly, so that the prmtingwill appear in a different color when said lever 67 is actuated. In order.

to maintain the ribbon frame in its normal position, a' torsional spring 73 is mounted on the rock shaft 66, said spring tending to maintain the ribbon framein the position seen in Fig/10.

74 designates a printing Wheel. of any suitable or conventional type.

The operation of the ribbon mechanism.

will now be readily apparent to those skilled in the art. I y

It will be apparent that while. I have shown in the present instance, the necessary rock shaft will be rocked.

actuation or intermittent oscillation of the rock shaft'5 as being derived from theretation of the. shaft 51 and the cam 52 there.

53 of the lever arm 54, which .co-acts there-.

with and will cause said arm to turn on its pivot and owing to the provision of the link (32 which is fixed to the rock shaft 5 and pivoted to the end 56. of the link 54, said As the shaft 5 is rocked, the dog or pawl '8 will eo-act. with the teeth 10 inthe ratchet wheel 11, causing said ratchet wheel 11 to be rotated in such a manner that the ribbon will he 2 unwound from the spoolseen at the right of Fig. 2 and wound upon the spool seen a the loll. of Fig. 2.

ll is to he IlOl Udllltlll when the parts are in the position seen *in Fig. 2, the dog or awl-9 slides freely upon the shield so that said pawl does not engage with the te th 12 (if ,the ratchet wheel l3. The bar At; or near the parts 11 and 13 at:

2'8 rests against a flattened spot on the spool 15 While the bar tests against a similar spot on the spool 22, the length of the said bars being apparent from Fig. 3.- Each bar is provided withan arm 26 and 38 respectively and said bars are inserted. in positionthrough the slots 29 and 41 and are held in position by the ribbon 33 being wound around them.

When one of the spools, as 22, 1s unwound or nearly unwound and the ribbon is unwound from the bar40,

said bar will be removed to the right of the 'pusition seen in Fig. 2 and the arm 38 will also move on its pivot pm 37 by reason ofits own weight so that the hook 39 will hang in the position seen in Fig. Since the ratchet Wheel 13 is turning in the direction of t-he'arrow seen in Fig.2, it will be apparent that the inner end of the pin 19 will be in the path of said hook and as said hook strikes said pin the link 18 audits adjuncts will be shifted to the right of the )osition seen, in Fig. 2 so that said link and spring 23 ill appear as seen dotted in said figure. The shield LO will now assume a position, such as is shown at the right of Fg. 1, whereupon the pawl 9 is now operative and the pawl 8 is inoperative, since the shield 16' has been moved-to the right of the position seen in Fig. 2. For the sake of clearness of illustration, I hate omitted the arm 38 from the upper right hand portion of Fig. 1. It will thus be apparent that the ribbon feed is automatically reversed when a desired quantity of ribbon is unwound from one of the spools.

\Vith the parts as seen in Fig. 10, the portion ill; or the black surface of the ribbon is operative but when it is desired to print in a contrasting color, such asjred, as indicated at 35, the operator depresses the lever 67 thus causing the shaft 66" to be rocked against the. tension of the spring 73 and owing to the provision of the links 69 and 70' and the manner in which they are pivoted,

the ribbon frame 3 will be caused to move forwardly so that the portion of the ribbon 33 having a contrasting color, such .as red, as indicated at 35, will be brought into operative position. As soon as the: operator releases his pressure from the presser piece (3801 the lever 37, the torsional spring 73,,

mounted on the shaft (36, will cause said shaft to rock and. the ribbon frame 3 ,will

be returned to'its normal positiomas indicated in- Fig, 1.0. The proper oscillation is given to theshafts whereby the proper pa WI.

as 8 or 9, is operated by the rotation of the cam 52 whercl properly at all times. i

In order to permit the forward and rear ward movement of the ribbon frame. the elbow lever 54- has its arm 56 slotted or rccessed as seen at 57 and 58 and since the the feeding of the ribbon conjunctionwith going, that I have produced'a novel and useful construction of ribbon inecha-nlsm' studs 59 pass through said slots and are seder to permit free relative movement ofthe the slot 58 links GO'and 56, I have shown '1 slot 57.

as bein slightly larger than the It Wi l, ofcourse, be apparent that while I I have shown my resent inventionas being adapted tobe emp oyed in conjunction with.

a calculatin I and claime "in my co-pendin'gfa plication erred, my-

machine such as is described to which I have hereinbefore 're novel constructlon of ribbon mechanism and actuating. means therefor may. beemployed to advantage in conjunction with any known or conventional type of calculating or recording mechanism.

I have deemed-it 'best for'the purpose of to show the shields carried byillustration, 7 p the s ools asbeing connected by meansof a su'ita le spring actuated member which is apparent that this would vary in accordance with; the type of recording mechanism in ism is employed' It will now be apparent from the foreand actuating mechanismtherefor, which embodies thefeaturcs of advantage enumer= 'ated as desirable In the statement of 1nvention andfills-above description and while I ha've',fin. the present linstance shown and described the preferred embodiment thereof,

it'is to be understood that it'is susceptible of modification in" various particulars with-- out departing from the spirit and scope of lily-invention or sacrificing any of its advantages. v, I

Having thus described my inventiomwhat I claim as new and desire to secure by Let{ ters Patent, is 1 1. In a ribbon mechanism, means'for feeding the ribbomand means mounted. on a rib bon-spoolshaft for interposition between members. 'of -the'ffeeding,means for automatically reversing'the feed.

2. In a ribbon mechanism, a pair of spools on which .the' ribbon is'wound, ratchet wheels on said spools, a'wls adapted to actuate said' wheels, a rocks aft on which said pawls'are mounted, and means mounted for nterpos tion between a pawl a'nd' its ratchet for maintainin'gone or thel other of said .pawls, ati v'e*relation "with its respective ri a ratchet 7 wheel;

3 111 a ribbon mechanism, a pair of spools or which the ribbon is wound,- ratchet wheels awls ada ted to actuate said liich 'said pawls' are which: the ribboninechamwheels, a shaft said shields, ratchet teethon said 'sp pawls'carried-by said rock 120 in operative -relation., with its respective ratchet wheehandmeans'f reversing the ribbon feed when one or the other of said spools is nearly-unwound. 4: In a-ribbonmechanism,

.a frame movautomatically .ablylmountedfa:pair; of spools mounted 1 therein on \vhiel 1-the ribbon is Wound, guides for said ribbon carried by said frame, each of said-spools having 'a flatte'ned portion, ',ap'er tured ratchet wheels carried by said "spools, bafsadapted to engage the flattened porti'ons ofsaidspools and passing through the apertures (if said wheels, armssecured;

at one end t'ofsaid bars and pivotally supported at their other, a rock shaft, pajwls carried thereby-adapted to actuate said ratchet edlto hold one orthe' other of said pawls out wheels, shields for said ratchet wheels adapt-T as v of engagement with its respective ratchet, and. aconnection pivoted to said-sh1el'ds,j,one'- 'or the other of sa1d arms .co-acting with'thc p1voted at its end to each shleld, but it-"is j pivot of the connectionin proximity thereto to reverse the ribbon feed when said ribbon is nearly unwound from the'spools,

5, In aribbon feeding mechanism for,

actuated bar joining said shields, ratchet teeth on said spools, and a rod carrying 110 pawls engaging said ratchet teeth alternately. 7. In a" ribbon, feeding mechanism for computing machines, a pair of spools each computin'g'machines, apair of spools,an llIlkLIlg ribbon wound thereon, a ratchet wheel on each of said spools, SlIIldS for saldhaving a" flattened :portion, a bar lying against each 'of said to said bars'atone en and pivotally mounted on the other, movable shields "for said spools, a springactuatedaconnection joining ools, a rock shaft, and 'sh'afta'dapted to engage alternatelywith the ratchetsof said spools.

(portions, arms secured I computing machines, ap'air': of spools each other of said pawls out of engagement with its respective ratchet wheel, and a rock shaft for actuating said pawls.

'9. In a ribbon feeding mechanism for computing machines, a frame, a: pair of shafts journaled therein, spools mounted on said shafts, ratchet teeth associated with said spools, bars lying against said spools,

a -ms secured to said bars .at one end and pivotallv mounted at the other, a slneld mounted in proximity to each of said spools, a spring actuated bar joining said shields, pawls engaging alternately withsaid teeth, and means for actuating. said pawls.

10. In a ribbon mechanism, a frame, a pair of spools journaled therein on which the ribbon is wound, said spools having a recess therein, a bar adapted to engage said recess, an arm pivotally supported at. one end and having a hook at the other end to which saidv bariis secured, ratchet wheels having apertures through which said bars extend, a rock shaft, pawls carried thereby, shields for permitting the cooperation of one or the other of said pawls with its respective ratchet wheel, and a spring actuated connection pivoted to. said shields, said hooks co-act1ng with the PIVOl'S'Of said conneetions, when a portion of the. ribbon 1S unwound froma spool, to reverse the ribbon feed.

11. In a ribbon-feeding mebhanism forpawls. on said arms, co-acting with said ratchet wheels, means for shifting said shields in unison and thereby automatically throwing one of said pawls out of engage ment withits ratchet wheel, and means for moving saidribbon frame to bringa different color of theribbon into operative position.

12.111 a ribbon feeding mechanism for computing machines, a ma n frame. a ribbon frame movably mounted therein, spools carriedby the ribbon frame, an inking ribbon mounted onsaid spools. a ratchet wheel on each of said spools, shields for each of said. wheels, :1 roclrsliaft journaled in proximity to said spools, arms carried by said shaft,

pawls carried by said arms and (o-acting I with said ratchet wheels, means for shifting said shields in unison. and thereby automatically throwlng one of said pawl-s out f engagement with-its ratchet wheel, a bracket depending from the main frame, a shaft jonrnaled in said bracket, a link secure said shaft, an actuating lever carried b} last named shaft, a link pivotedto said first mentioned link and havingpivotal relation with the ribbon frame, and yielding means for maintaining the ribbon frame in it nor- 1 mal position.

it). In a ribbon mechanism, a. ribbon ha\' ing contrasting colors thereon, spools on which said ribbon is wound, means for intermittently feeding said ribbon, moans embodying a inovablv-mounted shield controlled by the ribbon for automatically re versing the feed thereof. and means for moving said ribbon laterall so as to presenteither of said contrasting colors to the printing device. p

14. In a ribbon mechanism, a carrying member, a ribbon carried thereby, means pivoted to said membe and controlled by said ribbon for automatically re\-'ersing the feed thereof, actuating means for said member, and a movablv-numnted shield for antomatically rendering said actuating means inoperative whenthe ribbon feed is reversed.

15. In a ribbon mechanism. a carrying member having a flattened portion thereon,

a ribbon secured adjacent to said flattened portion. means for actuating said member, and a radially-guided mechanism normally engaging said flattened portion and coactin withsaid ribbon to reverse the feed of said me.mber..

16. In a ribbon mechanism, a carrying member, a ribbon secured thereto, means pivoted on said member and controlled by said ribbon for automatically reversing the feed thereof, actuating means for said member; and a shield adapted to be interposed 'member and controlled bysaid ribbon,

means for actuating saidmember, devices for automatically rendering said actuat ngmeans inoperative, and means for bringing the desired color of said ribbon intooper ative position. I

'18. In a ribbon mechanism, a carrying memb r, a ribbon carried thereby, means pivoted to said member for automatlcally reversing the feed thereof, said mean's beingnormally held in engagement with said member by said ribbon and adapted when 11 released by said member to'move outwardly by gravity and actuating" means for said member, and a shield pivoted adjacent said,

member and adapted to render the actuating means inoperative.

19., In a ribbon mechanism, a frame,move ably mounted, carrying members supported therein, a ribbon engaging isaid members, separate means for-actuating each of said members, means including a pivoted shield for rendering the 'actuatin means for one or the other of-said mem ers inopeya-tive,

, yielding means fo r'maintainin'g said ribbon in normal position, and means for moving sald frame to bring acontrastln'g color of ,said ribbon into operative position.

l In 1 a ribbon"; mechanism, a '-'carrying member having ratchet teeth on 'one end thereof and having an 'aperturethrough'a trastingcolors side thereof, a' ribbon provided-with conengaging said member, means en aging sai said, mem er, a shieldadjacent said ratchet for preventing the engagement of the mem ber actuating means therewith, a bar pass-t ing throughisaidv,apertureiand' controlled by said ribbon, and means carried by said memberand coactingwith said sliield toxrender "color into operative position, and a't'orsional v tension device for said frame moving means,

22. Ina ribbon mechanism, a frame movmounted, a pair of spools provided Wit ratchets'having an aperture through a side thereof carried by. said frame, a ribbon provided with contrasting colors secured to said-spools, separate piiwl's coacting with each ratchet, a tension device for said pawls, means for actuating said p'awls, and a reversin device includingfifbars shields. pivotally mounted and adapted to v .throwone'or the other of said pawls -Ol1t '0f engagement with its respective ratchet,"

23. In a ribbon mechanism, a, frame movablymounted, a pair of spools rovided with ratchets having an aperture tliiough a .side thereofcarried-byrsaid frame fa rib bon provided with contrasting co ors securedto sai'dispools, separate pawlsjcoact- H mg withzezitzh-ratchet, a tension device for said pawls, means; .for actuating said pawls and a reversing-'=device'including ,barspass.

ratchet for actuating passing throug said apertures, arms provided with hooks'to which said bars are secured, and

separate means engaging each ratchet ing through said apertures, arms provided with hooks to which said bars are secured, shields pivotally mounted and adapted to throw one or the other of said pawls out of engagement with its respective ratchet, and yielding means for normallytmaintaining one color of said ribbon in operative posi- 'tion."

24.- In a ribbon mechanism, a main frame, guides carriedthereby, a ribbon frame movably mounted on said main frame, carrying members supported in said -ribbon frame, a ribbon provided with contrasting colors, engaging each member and said guides, a rock Jshaft carried by the ribbon frame, means carried by said shaft for intermittently actuating one ,or the other of saidjcarryin members, a drivingjshaft, a cam carrie thereby, :levers actuated by said cam foractuating said rockrshaft, and nieansfor permitting the relative movement of said levers when theribbon frame moved from its' a normal position.

25 111 a 'ribbon mechanism, a ribbon frame movably mounted, carrying members supported ther'eby, a ribbon provided with contrasting colors engaging 'said members,

a driving shaft, acamthereon levers actuv ated thereby, a second shaft rockedbysaid levers, means ;for permitting the relative movement of ,said levers, links carried by, said shaft, pawls carried by said links, a tension dev ce for said ,pawls, means for "permitting said pawlsto actuate one or the other of'said members, a}tension'device .for normally maintaining said frame in normal position, and a lever adapted torinove said operativeposition.

26. In a ribbon mechanism, a ribbon frame, carrying members supported'there-105 byandprovided with ratchets on one side thereof and an aperture through said side, I pawls coacting vwith said ratchets, means for actuating said pawls, a plurality 'of connected shields. for maintaining one or the other ofsaid pawls out of operative. posi- ,tion', and meanspassing through said aper-:

.frame to bring 'a contrasting color into ture controlled by the ribbon and coacting with said members toautomatically reverse *the ribbon feed. v I I 27. In a ribbonmechanism, ratchet spools,

intermittently rotating saidg ll I including pivoted v, shield pf r minim gp 4 maintaining onefor the jother of, saidf qmgt trolled by h t-"ir and mb t elitqm is ly t inqe'nti are r201, ing, means ino erative;- f. and,.z means, I

10 interposed means to move them in unison,

brought into position between the ratchets 30. In a ribbon mechanism, means for and paWls to keep the latter from contact feeding the ribbon, and means mounted on with. the former. a ribbon-spool shaft for interposition be- 29'. In a ribbon mechanism, the coln'binal tween the members" of said feeding means tion with the spools and their ratchets, and and operable when a desired quantity of coacting pawls, of means mounted to be l ribbon is unwound from one of the spools, brought into position between the ratchets to automatically reverse'the feed. and pawls to keep the latter from contact OLIVER D. J OHANTGEH. with the former, and means connecting said \Vitnesses:

E. HAYWARD FAIRBANKS,

HERBERT S. FAIRBANKS.

one into, the other out of, operative position.

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