US933652A - Ribbon mechanism for type-writing machines. - Google Patents

Ribbon mechanism for type-writing machines. Download PDF


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US933652A US37131507A US1907371315A US933652A US 933652 A US933652 A US 933652A US 37131507 A US37131507 A US 37131507A US 1907371315 A US1907371315 A US 1907371315A US 933652 A US933652 A US 933652A
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Emmit G Latta
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    • B41J35/00Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/22Mechanisms permitting the selective use of a plurality of ink ribbons
    • B41J35/23Mechanisms permitting the selective use of a plurality of ink ribbons with two or more ribbon guides


y 'APPLICATION FILED MAY 1, 1907. .i v 933,652. Patented sepm, 1909.
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' Patented Sept. 7, 1909.
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E. e.l LATTA.
Patented Sept. 7, 1909.
Patented spt. 7, 1909.
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933,652, Patented Sept. 7, 1909.
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rzesses: v 4 am cliin'es of the sort in Which the rib '50, of spools UNiTEDsTATEs PATENT OFFICE? A .EMMI'T e. LATTA, orl sYn'AcUsn, NEW YORK, Assisivon or ONE-HALF To HARVEY A.
Applicationl nizza May i, i907. seriai 110.371,31.
To all whom *it may concern.'
Syracusein the county of Onondaga and State of vNew York, have invented a new and useful Improvement in Ribbon Mechanisms for Type-Writing Machines, of `Which ,they
following is a specification.
. This inve'ntion'- relates more particularly to ribbon operating mechanisms for front' strike or visible Writing 1typewritingmavibrated to and vfrom printing position in front of or opposite to the printing point on 15 the platen, so as to expose the Writing to view except When imakin'g the impressions.' .Many featuresof theinvention are not, however, restricted in application to such a typewritingmachine,
directed to improvements in the mechanism for feedingthe ribbon lengthwise .the\ mechanism for reversing the j The invention is 25. direction offeed of the ribbon; the ribbon spools; and the ribbon vibrating mechanism, and the primary objectsof 'the invention are to provide simple andgeliicient means, operated by the carriage driving pov'ver, for Wind# ing the ribbon from one spool onto the other;
' toA provide reliable means of simple construc-y tion for automatically and promptly revers- .ing the ribbon feed'vvhen the. ribbonis-ex haiisted fromeither 'of the spools; to accomi pliShthisreVerSal by power or motor'driven -n ieansin--Which' power is stored manually.
independeiitlyr of the operation of the carof a single "ribbon, or a plurality of 'ribbons carrying inks of diderent colors o r characl teristics, and to provide v simple meanswhere;
by oneor the other of the dili'e'rent ribbons-- .45 .or different parts ofa single ribbon can be placed in position yfor use by Vthe' simple movement of ashift key or device; to pro duce means for equalizing the tension of a plurality of ribbonswondon ajsingle pair v pensive and desirable construction adapted f for use with one or more ribbons, and which has apart constituting a -portionof the'feed to provide a desirable' reversing mechanism; 'and easy moving; 'ribbon-vibrating mechanspeclicanon 'of Letters Patent.
but are applicable -toother 2O kinds of typewriters and other machines employing an ink ribbon.
5 Fig-17 lisa'broken planview, par
to produce a ribbon spool ofinex' ism having provision for retaining the ribi bon or ribbons stationary out of printing position to adapt the vmachine rfor stencil cutting;'and to improvel ribbon mechanisms for typewritingmachines .or other machines employing a ribbon in the respects hereiiiafter described and set forth in the claims.
In the accompanying drawings, consisting o f five sheets: Figure 1 isa fragmentary centrallongitudinal sectional elevation of a front-strike typewriting machine provided with ribboiiinecliaiiisin embodying the invention.- Fig. 2 'is a planview,` partly in section, inline 2 2, Fig. 1, ofthe ribbon feeding and reversing mechanisms Fig. 3 is a fragmentary front sectional elevation of the ribbon reversing mechanism, a portion of the reversing mechanism 'being broken away to disclose the ribbon vibrator and guides'which 'are shown in elevation. Fig.
is a front" elevation of the ribbon vibrator and guides,- showing a different position of the guides from that shov'vn in Fig. 3. Figs. 5 and 6 are front. elevations of Vthe tivo ribbon guides detached. Fig. 7 is a rear eleva# tion of the vibrator detached. Fig. 'Sis a sectional elevation, on an enlarged scale, of the ribbon vibrator andguides 9-9, Fig. 8. Fig.- 10isv a plan view, partly lin horizontal section, ofthe ribbon' tension- Aand feed reversing mechanism. Fig. 11 is a detail section, on an 'enlarged scale, in` line 11-11, Fig. l, of thereversing trip device. Fig. 12is a fragmentary 'horizontal section, partly 'in plan, on an xenlarged scale, of one of the ribbon] spools and adjacent parts of the ribbon mechanism; showing the spool exhausted and the parts in position to reverse' the feed. Fig.- 13 is a detached perspective vieiv of the bridge 4and attaching device f or the ribbon spools. Fig. 14 is a Patenteiisept.- i, 1909.
Fig. 9 is a cross section thereof, partly in plan, 1n line plan vieWJOf oneof the ribbon spoolsLFig.
15 is a' verticalsection'thereof.'. Fig. 16 is a Asectional 'elevationof one of thefribbon spools and associated parts-,in line 16--'16,1Fig.,10.
other construction for the ribbonfeeiil re-l verging motor.
ny in' iren- 1 Like letters of reference refer to like parts in the several igures.'
A represents the top plate of the .frame of a typewriting machine, and a, Fig. 1, a cross bar thereof atthe upper rear portion of the keyboard. l
B represents the platen, C the carriage on which the platen is journaled, C', the frame or support having suitable tracks dr Ways on which the carriage travels horizontally, C2 the usual carriage-driving spring drum or motor, D one of the type-bars which are pivotally supported on' a segment or curved support d bellow the platen, and E one of the key levers-tor operating t-hev type-bars to which the key levers may lbe connected by the known means shown, or any other suitable operating connections. The type-bars are provided with upper and lower case type, and the frame or support C for the carriage is hinged at c to the upper rear portion of the main frame whereby it can be shifted vertically to place the platen in printing relationto o ne or the other set of types on they type-bars. Theshitt frame C is raisedl and lowered and held in either printing position by an eccentric f connected to the shift iframe by a pitman f and oscillated by a pinion f: meshing with a toothed segment f3 which is rocked by an arm f4 and key lever The parts described form no part of the pre-sent invention and are thus brieily described and shown simply to enable'a better understanding` of the ribbon vmechanism to E' be described.
G G represent two ink ribbons which are connected at opposite ends to suitable spools which are operated to feed the ribbon lengthwise, and they pass centrally through suitable vibrating guides in front o'tlor opposite to the printing point of the platen. 1 The two' ribbons, which may'carry inks (littering in color or other characteristics, are preferably wound simultaneously, or together, face to tion lwhich extends foutwardly centrally within thc depression. ,l/Vhen the two end disks are placed together the cupped central portions form the cylindrical body of the spool, and thc -liub portions f1.2 a hollow hub. The circular body walls bounding the depressions constitute tracks for the feed reversing trip device, as will hereinafter appear. lbe two end plates are secured to- 'gether by a projecting thimble ha on each is provided with an, opening ki* ,andthe spool is provided between the flangesthere-v of with a hinged ribbonattaching device la.
which is hingedat one-e'nd to the spool* adf jacent to onelend of the opening ht and is adapted tobridge-said'openin'g or form a port-ion of the cylindrical wall ofthe spool body, as shown in Fig. l0. The opening M at top and bottom lextends out into the fianges of the spool and the ends of these portions in the-flanges slope or incline rad-l ually, vas shown inFigs. .12 and'14, or a reason which will appear later. The device it, which will be termed a bridge, is. prefferably formed of a piece; of thin sprin.
metal bent upon itselffto provide inner an outer clamping jaws or members between which the ribbon is grip ed and held. The inner jaw bears at its' en s againstthe cylindrical body of the spool at opposite sides ofthe opening' h4, and is. preferably bent in.-
-wardly between its ends so that it Will enter the opening h4 and its inner surface form a continuation of the inner surface of the circular body vwall or track -of the spool o n which the reversing trip device travels, as will be hereinafter described. The bridge is hinged to the spool by integral trunnions or projections r"A at opposite sides of the con# nected ends of the jaws, which trunnions bear in small holes k7 in lthe flanges of the spool. Each end plate of the spool is provided with two of these holes so that the disks are alikel and'can be made from a single set of dies, but only one hole in each disk' is employed for hinging the bridge, thereto.
The outer jaw of the bridge is provided with integral teeth or prongs vl1. which project into holes It in the inner jaw. The awsa-re forced apart, as shown in Fig. 13, to place the ribbon between'thein, and when the jaws are released they spring together so that the teeth lr* penetrate the ribbon and securely hold the. same. hold one or more ribbons. The ribbon is readily attached to the bridge by swinging it out to the position shown by dotted lines The bridge will securelyin Fig. 14 and placing a pencil or other slender implement'between the hinged-end of the bridge and body oii'the spoolwhich enables the outer jaw to 'be sprung away from the lnner jaw.. The outer jawis preterably longer than the mner jaw to facili- .tate opening it. lVhen the ribbon is wound uponl the spool the second and subsequent turns'of the ribbon pass outside of the bridge and hold the same closed against the body of' the spool, and the outer jaw ofthe bridge being longer than the inner one'a greater i the'spool' can slip on-the spring or theinnerend' of the spring can slip out of the retain- A to the ribbon.- This spring also serves ,to retain the spoolv on the shaft in the ordinary- 93eme leverage is secured whereby the ribbon will the more firmlyholdthe bridge closed.' The spool is preferably provided with circular finger seats h1@ in its flangess .-The spool can be1 readily turned by hand to wind the ribbon thereon whenthis is desired, by placing a linger in the seat in its upperend.
' The 'ribbon spools are mounted on upright- -spool shafts I journal'ed in suitable bearings at lopposite sides of the front 'portionof .the g-)late and are held on the shafts -by re le orxfriction connecting devices pref-- erably lcons istingof spiral 'springs z' .which sur-round the shafts within the hollow rhubs'- of the spools'. The inner end of 'each spring rests inone of two or more4 notehesfi, Figs. 12 and 16,'in' the shaft, and its outer portion -be'ars frictionally against the wall of the hol- -low hub 'with suflicient force to canse the spool to tnrn with the shaft. If' unusual strain is placed upon the ribbon,.ho'wever,
ingnotch in the shaft to thereby allowthe spool to-turn on the shaftand prevent injury usage or handling of vthernachine, but allows the spool 'to be vslipped 'off of the -Shaftwhen force enough isapplied to cause the' spring 'to' dise'ngage the notch in' the 'shaft.. 'The spring z' and the bridge h5 are placed in position in the spool before the end. disks are f securedtogether and-no additional securingvv means for the spring or brid'geare required. lThe complete spool is thus composed of few 'parts which can be cheaply made and assembled. The spools'are lightand strong andare reversible and interchangeable on the shafts, which enables both sides of the ribbon to be used, and there are no detached Parts'WhiCh can be lost or mislaid, The spool bodiesV and flanges are of larger diameter than usual, to` ,increase the spool capacity for a plurality ofv ribbons and cause less difference in the feed of the ribbons when-thetspools arenearlyfull and nearly empty.v ASpools.. constructed as describedwith the rneans for attaching them to their shafts and attaching the ribbon the-reto,would-be desirablev in'inany forms of 4 typewritingv and other machines having rlb-v bon-operating mechanisms of different con-v structions. v
The ribbon feedmecha'nisin is' preferably 4constructed"as follows, see especially Figs. 1,
omineeted, farine-tance, bya pin s, Fig 2,.
on one lever entering a slot la? in the end of the yother lever.-
represents a .screw or threaded part vsecured .or lconnectedto the 'carria e-drlvlng ,springbarrel or.rnotor so as to' e ,driven-thereby One of the `feed levers is provided. with a stud or pinl la* which engagesthe threadsof this screw, so that rotation of the s 'crevvrocks the twov feed levers on their. fulcra.` When the "spring barrel turns slowlyin one direction inv niovl "ing the carriage to the left,th e feed levers are slowly rocked in one direction, andA when thel carriage isset back-and the rotation, of
thespring barrellreversed, the feed levers are rocked in the opposite directien,` thc levers being moved whenever the barrelfturns.- The feed levers have torwardlv aro ectin arlnsv providedv at their' front ends with toothed segments or. racks le?V which mesh with 'toothed pinions le mountedto' turn'freely on the lowerlends of the spool shafts I. Ratchet- Wheels L areiiired to the spool shafts, preferablyfabove the pinions la, and p awls l-carried by arms l projecting from the pinions le cooperatewiththeseratchet wheels to turn the spool-shafts.: Y The nosesro'f the pawls l are pressed toward theratchet wheels by hidden springs in lthe pa'wls. c Z2 represents hold-ing dogs which arel pressed'toward the ratchet wheels byv hidden springs to engage Lthe teeth` thereofv and 'holdthe wheels from rearward rotation. The feedl-pawls oscillate back and forth' with they feed levers, which swing together i-noposite directions'gjand one of the pawls is held by its spring against its ratchet- Wheel to turn the same and the connected spool shaft and spool, but the other pawl is held out of engagement with its ratchet wheel by `one of two reversinglevers M M, Figs.2 and 16. One ofjthese levers is i I arranged horizontally above eachv 'ratchet wheel, being pivoted at its rear end on a;
jscrew m secured to the frame top or in `any other suitable manner. The reversing levers have loops' between their endssurroundingim the' spool shafts, each loopfhaving at one side a segmental-circular inner edge whiclr.` i'n'one position of the lever is concentric with the spool shaft, see the lever at the left in F ig. 2. In the position of the reversing levers shown in Fig. 2, the circular edge of the lever M at the left engages an upright stud or projection m on the tail of the adjacent feedv pawl and holds the pawl out ofen'gagement' with its ratchet Wheel, and the other side otl the lopof this lever bears against the end of' the adjacent holdingdog Z2 vand alsoholds this' out of engagement with, the ratchet wheel, while the reversing lever l# the lright in Fig; 2 is held out vof engagement `with the adjacent feed pawl which can thereifore engage its ratchet wheel as the l'pawl 'is moved back and forth; The holding dog is also allowed to engage this ratchet wheel. In this .position of the reversing levers, therefore, the rightjhand ratchet-.wheeland connected vspool are turned to wind lthe ribbon thereon and the other ratchet wheel and connected spool are released so that thegspool hand'ratchet Wheel will be rendered`inac` tive and that-for theleft-hand wheel will come into action.- The-,reversing mechanism for thus shifting the' reversing levers is preferably constructed as follows, see especially Fi s. 2, 10 and '11. N -represents a horizont'a reversin shaft which is journaled transversely o the machine beneath' \the front. portion of the top plate vA in suit-v `ableybearings n depending from the top plate. This shaft is provided with eamsn n2 having grooves in which engage studs or pins n3 on the front'ends of the reversing levers. The `cam grooves are so shaped that when the shaft is turnedy a half revolution the reversing levers will be shifted and the direction of feed of the ribbon\ reverted. The reversinglevers are held stationary in either positionvby' the'cams n n.2. The reversing shaft is preferably turned in one direction to automatically 'reverse the ribbon feed, by a suitable dri-ving spring or motor which is wound by hand to store power therein. In the construction shown vin Figs. .l to-3, 10, and v11, a spring a* is coiled about the re-. Yersing shaft, being attached at one end to the shaft by a pin a, Figs. 2 and 10, or other means, and at-`its other end to a pin n depending fromthe top plate,` or other vstationary part of4 the machine. A hand crank 'nF-is provided at'one end of the'shaft for turning'the lsame to Wind the spring.
' This crank, see Fig. 3, is loose and. adapted to slide on t-he'shaft to engage av in n. on the shaft in a notch in the hul of the crank, wherebythe shaft can' lbe turned by the crank'. Normally, however, the crank is held out'of engagement with the pin by a springe,0 surrounding theshaft witliinthe hub of the crank between shoulders on the between their ends within the 4spool pockets' in the top plate below the ribbon spools. The inner or rear ends of the trip lever have'upright studsfor parts which extend up into the lower depressions of the spools "and bear against the inner surface ofthe surrounding circular walls or tracks of the spools, see Figs. 10 and 16. The outer ends of the trip levers extend through holes in the spool pockets ltoward lthe reversing shaft- N, adjacent topinsl or projections p p trip levers are normally held in the Yof. the pins p -ylfa'nd the studs at their inner which, in the construction shown, secure the cams on` the shaft and extend from' opposite sides of the shaft. The outer ends of the paths end'. against t circular walls or tracks of the spools by suitable light springs p2, Fig. 1'0, cmnectingv thel trip .levers vto adjacent parts of the' top plate. One of the ins p p normally rests against the underside of the adjacenthtrip lever, -asshown at the left in Fig. 10 and injFig. 11, and holds the shaft from being turned by its spring n4. The shaft is thus held stationary so long as the ribbon wound on the spools holds .the bridges before mentioned, closed, toform acon-f tinuoustrack for the studs at the inner ends of the trip'levers. When, however, the rib- .bon is `unvv'ound from 'either spool it will allow the bridge thereof to swing outwardly away from the body of the spool, as shown in Fig. 12, so that when the opening 71,* in the body of the spool arrives opposite to the stud on the trip lever the stud can enter the opening, thereby permitting the outei" end of the trip .lever to lbe `pulled by its spring p2 out of engagement Withthepin on the reversing shaft. This releases the shaft and it is turned a halfrevolution by its spring, or until arrested by the engagement of the other pin against the underside yo f the other trip lever. This half revolution of the shaft acting through the cams shifts the reversing levers M M Vto stop the winding of the full spool and cause the empty spool to commence winding the ribbon thereon. This action of the reversing mechanism is immediate and no strain whatever on the ribbon is required to operate the trip levers and start the reversing action. 4The reverse takes place without strain on the carriagedriving spring or printing mechanism, and moreover, -the reverse can only be effected automatically when the ribbon is practically all exhausted from one of the spools. As soon 'as thereversing shaft has beenl tripped -the then empty spool begins at once to rewind thel ribbon thereon, and, as at Vthis time the detent for this spool is free from the pin on the reversing shaft, and its movement is only .resisted by the light spring p2, the trip lever will be forced back to the normal position'by the engagement ofthe inclined end of the holeL* in thebot'- tom flange of the spool with the stud of the trip lever. The'continued winding ofthe spool swings the bridge back to-elosed'position, where it will be held by the first coil 'trip lever with only a single turn of the der faces 773, Fig. 171, so that the pressure ofi ribbon about the spool. The outer'ends of the trip levers preferably have inclined unthe pin on the reversing shaft against this lface assists the trip leverspring in movingl the trip lever. The-inclination of the face p3 is slight andthe trip lever for 'the full spool will not be swung by the engagement of the pin dif the reversing shaft therewith in -the levent that the shaft is )turned at a time when the stud of the triplever bears against the bridge l, as the .bridge will be firmly held closed bythe numerous turns of the, `ribbon surrounding it. The outer `ends of the trip 'levers also have relatively steep-inclined upper faces if, Fig. l11. When the reversing shaft is turnedby hand in theA opposite direction to wind its driving spring fthe pins, on the shaft alternately engage these upper inclined faces p4 of the trip levers and swing" the `levers out of the 'patlisof the pins. The reversing spring should be wound up when a` new ribbon is applied to the machine and it will reverse the feed a sufficient number of times to` eX- reversed at any time by turning therevers-j ing shaftby hand inthe direction to wind the di:i\ fing.spiiiig." The shaft withoutA the spi-ing could, v:if desired, Vbe employed for manually. reversing the yribbon `feed The construction of the reversing niechanism could vbe .changed in various respects without i' departing from vrtheprinciple thereof. f In the construction shown in Figs. 1,7 and i8, one `end oft'the.d riving s ring (not shown) forthe reversing shaft N is attached n to the shaft as before, and the otherl end 'of the spring is attached to the hub of a pinion- 715 which is loose `on the reversing shaft.'
rIfhis pinion'meshes with another pinion p, on a winding shaft p7 which lis journaled in suitable bearings de ,endingfrom the top plate A and is provi ed with a crank p8' for turning it. The crank is connected to the shaft so that it can slide longitudinally thereon, for instance, by a'serew entering akey wayin the shaft. When the crank isy pulled ont tothe position shown in Fig. v18 it can beturned to 'rotate the winding shaft and wind the spring, but when the crank is shoved ii to the position, shown in Fig. 17,
` 'it will be held by the windingsprine against the fi'ange'bf the'top plate and hold dtie wind- .o ing shaft. and reversing shaft from rotation -arate slots for bythe spring. In this construction tlierotation of the reversing shaft by its spring shifts the reversing levers and reverses the direction of. feed of the ribbon, but the rey' versing shaft remains stationary and does notv move the reversing' levers when the Winding shaft is turned to wind the spring. In this construction the trip lever Oshovvn` is provided with an anti-friction roller to` bear on the circulartrack of the spool. This construction of the reversing mechanism is somewhat more expensive to build than the other but it worksvery easily and is more sensitive in action, andI as the reversing le vers are not moved in winding the driving springit is not necessary forthe operator to observe tliedireotion in whiehlthev ribbon. is feeding before winding thespring in order to have the ribbon feed in the same direction whenthe spring is wound before the ribbonl is exhausted from one.of'the-spools,i
'Fig 19'shows still another`,
of the reversing mechanism in which pf represent-S a winding shaft journaled in a suit7 able bearing on the frame' and geared'to the .reversing shaft by'a wheel pm loose on the winding shaft and apinion p11 secured tof or formed on the ,adjacent cam on the reversing shaft N2, The winding. v'Shaft is 'Y provided With a fixed 'key or thumb piece for turning it, and a spiral drivin spring '291.2 is secured at its Iinner-end tot e inner end of the windingsha'ft and at its outer end to the loosegear wheel p10.' The Wind-y ing shaft is held from backward rotationl by ioo a spring detent p13 secured to the bearing bracket for the shaft with its free end eii- .A
teeth p14' on the hub ofthe gaging ratchet In ythis construction alsothe thumb piece.
reversingshaft is not turned backwardly. in
-wi'nding 'the driving spring acts to reverse spring. The spiral same as the coil s 'ring' shaft. The chie v struction the fact that one revolution of the winding shaft will store power to *re-"v, volve ,the reversing shaft a numbery of'times.
' @The ribbon guiding and vibratinfr mechanism is preferablyI constructed 'as follows: The .ribbons 4pass from the spools through' stationary guides q, Figs. 1,3'afnol"10,v located-adjacent to the s lools and having sep'- each ri around the reversing advantage 'ofv this vconiio bon'to hold the ribbons outl of contact at these points, and from'.
theseguides theribbons extend rearwardly and throughvibrating'guides Q Q', Figs. 1 6, 8 and 9, which and normally below the printing point and are supported and ,vibrated together by a `-vibratoror' carrier R. The guideslare arfV ranged- .one directly in rear ofthe other to move or shift vertically in ways r at the op-` posite edgesy of the rear side of the vibrator, and.. h`ave forked upper ends-with. sideguide- ,loops-l for the-ribbons. The guides are prefi are locatedin. front'of erably made of spring metal and -flexed sli htly to insure t e necessary friction for ho ding them stationary in the ways of the vibrator except when purposely shifted. The uides are held inthe vibratoron'e higher than the other to hold the upper portionl of' one ribbon abovev the uper edge 4of the other ribbon where it can e engaged by the type to make the im ressions, and the guides can be shifted on t e vibrator to thus hold whichever ribbon is to be used higher. The
vibrator, which is arranged in frontofthe lscale bar of the carriage, is provided with a hole r through which, and snnilar holes r2 in the guides, the scale can be seen. Each guide has pointers or indexes r3 at the upper and I v lower ends of lits hole r2, and in one position 4of theguides the upperpointer of one guide and the lower pointer of the other will be exposed throu h the hole in the vibrator, see i 3, to in icate the printing. point on the sca e.A lWhen the guides are shifted the upper pointer of the other uide and the lower pointer of theirstgui e will 'be likewise exposed through the hole in the vibrav tor.
The vibrator or carrierAR, Figs. 1-3 andl i 7-9,is arranged inupright posltion .below and in frontof the printing'point of the platen. The u per end of the vibrator, like the 'guides ,-is orked for the passage 'of the" type in'. moving to theplaten, and its lower endl is also slotted or forked. The vibrator is movably supported in upright position by below the key levers so as to be engaged and'l upper and 4lower parallel links r4 fr each plvoted in a slotted` front extension 1 of the carriage. shift' frame and having forwardlyextending separated arms pivoted to theopl 'positesides 'of the vibrator. The upper link 1'* h'as 'a rearwardly projecting arm connected by a link rl-to a central rock arm 118 secured to a horizontal rock shaft 1' which is journaled at opposite ends in suitable bear. l ings atthe sides 4of the machine. The'rock shaft is provided with forwardly extending side arms rw from -he front ends -ofl which is suspended `a universal bar or'bai'l S which extendsghorizont'ally across the machine just operated to raise the vibrator whenever a key lever is depressed to operate a type-bar. Thevibrator is returned to lits 'normal low'-y ered position and the universal bar held up j in its normalposition by asuitable spring,
such ass, connecting the rock arm 118 to the top plate. The key levers are provided adjacent to the universal bar S with notches s 'in their lower edges. The universal bar can be swung forwardly on lthe pivotal connec- .tions with its supporting arms to place it beneath these notches s, and when so' placed the universal bar wirllnot be depressed when the' key levers are operated, and the vibrator will remain statlonary 1n lts lower-posit1on porting bracket.
and hold the ribbons down beloi\' 'tlie print'- ingpoint, thus adapting the machine for' stencil'cutting. The universal bar held in the forward position when placed in, this position, by any suitable means such, for instance, as a deten't, not showny vIf desired, the ribbons "can b'e prevented from feeding lengthwise while stencil cut-v ting, by raising thespool that is winding the y ribbon on its shaft until its spring z' rests on top of the shaft which will allow the spool to remain stationary.l y The vibrator being mounted on the swlnging parallel'links is "always he'ld upright and moves withv much less friction thanavibrator sliding in guides, for the forward pull of the ribbonsA causes cross strains in the guides of a 'sliding vibrai tor. This saving-in friction fully equals the extra'work of vibratin the second ribbon.
` The -link 71T connecting t 1e rock arm rato the 'rearwardly projecting arm of. the vibrator links allows .the yvibrator to move up land down 'with the carriagel shift'v frame when shifted and .produces a-nearly like movement of the "vibrator in both positions'o'f the shift -The guidesare shifted tOchangefthe Iribfbons by the following mechanismz-T, Figs.
4, S'and 9 represents a rocker or lever pivand having-slotsv in itsendsinw ich engage -oted centrally'on the vibratorzb a screw t pins t t2, one projecting from one side of one guide Q andthe other fromthe oppo.
site side of the 'other guide Q'. The guldes and vibrator are slotted-or forked at theirlower ends, as shown, toallow the `pins 'on the guides Ato project forwardly into the slots of the rocker T. t3 representsA au operating lever for the guides. This lever, see
Figs. land 2, .is `fpivotedjat its rear en din any ysuitable'manner .to the'forked extension lof the shift frame,'and ,its front end extends forwardly between the legs' 'of the vibrator and guides beneath a V-shaped central part or projection on .the rocker T. l'lhe lever t3 the cross bar a of the frame, The front end i of the key leverisnormallygheld up and the operating lever t3 held down 'by a suitable spring, 'suchl as that shown at u', F ig. 1, connecting anarm on theshift key with its supvThe front end of the guide-operating lever 15s-is ,normally held' centrally with regard to the rocker T by an upright sl yring guide 'V secured centrally `to the type. ar segment and having a loop at its upper end through which the shift rod t' and raisethe lower arm-'of the rocker no.l matter which end of the-rocker is thellower, and the rocker swinging' on`its ',pivot will4 elevate .the lower, gui je andlowerthe upper guide to change-theribbons. The vspring frontend of the lever being connected tothe:
' guide-willl yield laterally to allow the iside-' wised'electlon of the operating lever t3, and
,when-the' shiftkey is released and the oper-vating lever lowered, 'the front end'o the lat'-v 'ter will be returned to fthenormal central' position beneath the rocker T'jby the spring' Ilever t3 being 'pivoted'to'the carriage ish frame rises and falls with-the same, but' the shift rod "ghas but 'sl-ight" movement at'such times, the arrangement being. suchthat ,the
lever will operate similarly uponthe rocker T in either position-of the shift `frame'an'd` carriage, it only being necessary to'dep'ress the shift key U fartherl when the carriage is in its upper position. The construction;
4sione'dt-hel in on the arm" is-placed against' permits an instant 'changeofribbonsbythe,
simple depression of a key .or leverfmost favorably located in the keyboard, 'and like movements of the saine partv always change 4the ribbon no matter which one is' inp'osr- `bra'te to `and from' when the guide is raised-by; depressing the shift keyit` will place the lowereld 4of the. ribbon in position to f Avibrate to and 'from tion forv use, thereby avoidin-goonusion 'and' m1stalres,'as well as saving'tnn'e." `Thefront guide Q is preferably provided with 'a sec ond-operating pin #belowitsfother one if to enable va single ribbonto have two .ields oi different kindsv of ink -to be used if-def- .'sired. In such `case the lrear ribbon :is re-4 movedandthe pivot screw t for the rockerf is` loosened 4'so ,that the .rockercan be engaged with the llower upper field ofthe bon'finj'position` to virinting position, J and printing position. The Hshifting means act to' shift a siriglejv ribbon inthe same manner as when two ribbons are u'se'dbut-shiftf from a higher positiorLse that'fthe printing cannotbezseen .when the lower field is'being used. This, however, isnot a serious obee tion as thegl'owerield is used vbut little; By thisarrangement.either one or two ribbons caniche-used in the machine without adding anypart to lor removing-'any part'from the -mac'h1ne,'and 1n either case printing can be donewith different' inks.- The ribbon vi.
Abrating 'and' .shifting; mechanism described could also be used with ribbons wound on erly a 'out 0 i c pin' '15"'. Then' when thev guide 1s in Its low'en oslti'on-it'will hold the' land operated." The guide f'orithe' second ribbon-could, if; preferred, beomittedon ma' -chines designed for use with' onlyohe ribbon.
bon overlap, as shown- Inusing .two ribbons on the same pair of spools it is found alittle difficult to'maintain .-bothribbons at the .same tension, and 'v also 4 that theribbon that is' lusedthe most seems The guides could also .be arranged to:` support one ribbonits full-width above the other, but it .is preferred to'havel ther-ribs.v
to-gstretch `to anobje'ctionable degree. To Y .obviate this a tension' device W, Figs. 1'0. and
spool, preferablyiconsisting of anarm piv- 'oted t0 a lugon thetop plate and-having an uprightpin in its'jfreeend-,which stands' beside the ribbons -and `has its lower end connected. to a spring w, the other end of :112, iis-'provided near the fixed guide at each I which' isA connected toa lug on the undersid-e501 the fixed-ribbon. guide at a point'in vrear ofthepivot for the tension arm. 'By this arrangement',ofl the vspring the tension lfarm is'- drawn in'either directiongfrom its een-traljposition, and-.if the ribbons loe-prop plied the arm is permitted 'to' remain- I claim 'as my'inVention l-.fn'fa typewriting machte',- the combination of fa'- pair oftribbon spools, a carlr'ragedrifvingfmotor,a pairv of bell-crank leversmnuiited toswing'substantially horizon tally, and operative connections between said levers and said carriage-driving mot or and between said`levers-' and the'spools for rotatthe way,A the right' in Fig. l0,` but* ifthe ribbonsare'; not about vequally tening'the spools to. 'wind 4the lribbon thereon, v
substantially as-setfiforth. I
2. In a typewritingmachine, va pairor` ribbonspools. a carriage-driving motor, a Y
pai-r of connected bell-crank levers 'arranged -at oppositesides-of the machine to swing to.-
gether substantially `liorisexually., operative connections between one of said levers and said carriage-driving 1notor,and operative p' connections between "each of said levers and one. of the spools for rotating said spool, subg stantially as setI fforth.
,3: In a. typewriting machine, the combination of 'a pair of ribbon spools, a pair of pivotally connectedbellcrank levers., means for swinging-said levers.simultaneously inA oppositedirections, and connections between said levers and said-s ools'sfor turning one of the'spools, substantially ias set forth.
. 4. In a typewritin machine, the'combina* separate pairs. ofl spools suitably: arranged l tion of a pairof'ri bon spools.a pair of projecting toward the center lating said levers,
levers pivoted chine to swing gear on -either of said spool shafts to its shaft,
substantially asset fortli.-
6. In a typewritingmachine, the combination lof a .carriage driving motor, a pair lof pivoted levers, connections for moving said levers at all times with said motor, a pair of spool shafts, gears loose on :said spool shafts, teeth on saidlevers meshing with said gea-rs on the spool shafts, and means for alter# nately and simultaneously connecting one-of necting the other gear from its saidgears with its spool. shaft and ydiscenspool shaft, substantially as set forth. v
7 In atypewriting machine, the combination of a carriage driving motor, a screw connected to rotate therewith, a pair of con nected levers p ivoted at opposite sides of the machineto swlngfjliorizontally andactuated by said screw, a ribbon spool adapted to-be rotated by each of said levers, and means for operatively connecting either lever toits` spool, substantially as set. forth.
tion of a pair of ribbon spools, power-driven mea-ns for driving said spools including a pair of levers whose pivotal'axes are substantially parallel with the axes of saidspools, a pair of reversing levers substantially parallel. with saiddriving levers for connecting said spools with and disconnecting them from said driving means, and means for'simultaneously Swingin said reversing levers, substantially as set forth.
9. Ina typewriting machine, lthe combination of a carriage-driving motor, apair of spools, means including horizontally-swinging levers for transmitting motion from the carriage-driving motor to said spools to rovtate them, a pair of reversing levers, pivotally supported adjacent to said spools to swing horizontally for connecting and dis connecting said spoolsv to and from said motor-driven levers, and means for swing-v ing said reversing levers from one to the other of two positions and holding them against accidental movement, substantially,v
as set forth.
gears. loosely mounted 8. In a typewritingmachine, the combina-I*A -nections between said iing controlled thereby and the other lever mto l ing a central as set forth. 12. In a typewritlng machine, a ribbon',
10. In' a typewriting' machine, the com; bination of a carriage-driving motor, a pair of spools, horizontally-swinging levers oscillated by said carriage-driving motor for driving' said spools,
levers and said spools, a pair of horizontally-swinging reversing levers having curved faces for holding said pawls out of engagement with said ratchets,
and means for swinging one of said reverslevers into position to. engage the pawl posiion to release the pawlcontrolled thereby, substantially as set-forth.
ratchet and pawl con- 11'. In a typewriting machine, a ribbon.
spool consisting of two end plates each havdepressed part, the'idepressed parts being united to connect the end plates and form the body of the spool, substantially spool consisting of two end plateseach having an integral circular depressed part, the de ressed parts being .united to connect the end plates and form the Abody of the spool, and having the central portions -of such depressed parts turned outwardly to form the hub of the. spool, substantially as set forth.
13. vIn a typewriting' machine, aI ribbon s ool'composed entirely -of two plates having i epressed central portions secured together face to face, each plate forming'one end flange andone-half of the bodyof the spool,
substantially asset forth.
14. In a typewriting machine, a ribbon spool consisting of two end plates each having a depressed circularpart forming one-r half of the spool body., and each depressed ypart having an integral projection passing through a hole in the Aother depressed part and turned down thereon to secure thetwo plates together, substantially as set forth.
15. In a typewriting machine, a ribbon spool shaft, a spool havinga hollow hub, forming an annular chamber 'around sai'd shaft, and a part inlosed within said chamber in the hub outside of said shaft and forming a releasable connection for causing the spool to lturn with the shaft, substan tially as set' forth.
16. In a typewriting machine, a ribbon spool shaft, a spool having. a hollowhub said shaft, and a spring device located wit-hin said chamber and'carried by the hub for 4forming a; chamber in'the spool outside. of
arranged within the spool hub outside of f the lshaftand having a snap engagement with the shaft'and a frictional engagement with the hub, substantially as set forth.
18. In a typewriting machine, a ribbon spool,l and a ribbon attaching deviceinovably mounted' on the spool and comprising a pair of spring-holding jaivs for the ribbon connected at one end and adapted to be sprung apart at the other end'toreceive4 the 'end' of the ribbon, substantially as set forth. lli. In a typeivriting inachine, a ribbon spool having ribbon holding -jaws pivotally connected at one end to the .spool between' its flanges, and adapted to siving outwardly on its pivotiiiid have its jaws sprung'opeii to receive the ribbon, -substantially as set I forth.
. a part which travels against the inner sur- 20. ln ja typewriting machine, a ribbon spoolv having a ribbon attaching device pivot- :illy connected therewith, and provided with 'holding jaws, one of which has projecting pointsI adapted to penetrate the ribbon, substantially as setforth.
2l'. In a typeivriting machine, a. ribbon spool having a ribbon attaching devicepivoti ally connected thereto. and having holding vjaws, the outer jaiv being longer than the inner jaiv and forming ahandle by which the jai'vs may be sprung open toreceive the ribbon, substantially as set forth.
22. In a typevvritingmachine, the coin.-v bination of a ribbon spool having a circular` track at one end,and ribbon feed reversing ii'iechani'sm including a" trip device having face of said track, subst-antiallyv as set forth.
' 23. -In a typewriting machine, the combination of .a ribbon spool having a circular recess i.ii one end, and, ribbon feed reversing mechanism includinga trip device having a. part which is located in said -recess and travels on the circular Wall thereof,'substan adapted to enter said opening when the ribbon is exhausted from the spool, substantially as set forth.
2o. In Ja typevvriting machine, the' comb1- -iiation of a ribbon spool having a circular.
body wall with a'. circiimfere-ntial opening therein, and ribbon feed reversing-mechanism including a trip device normally beariiiOi on the inside o'f said body Wall and adapte to enter said openingand release the reversing mechanism when the ribbon is .exhausted from the spool, substantially as set forth.
2T. In a typewriting machine', the combination of a ribbon spool having a circular ii'all with a circumferential opening therein,A
a bridge normally closing'said opening and foi-ming a part of saidivall, and'iibbon rci'ei-sing mechanism including ainifivablc trip device l`which travelson the inside of said wall and-is adapted to 'enter said opening Vto release. the reversing mechanism ivlicii the ribbon is exhausted 'fronitlic spool, substantially as set forth.
2S. lii a typewiiting machine, the coiiibiF nation of a ribbon spool having a circular iiack 'at oiic end withv an opening therein.
a piroted bridge held iii position to close said opening b vlheribbon, and ribbon feed vreversing mechanism incliidingatrip device which travels on said track-and is adapted to enter said Aopei'iing when the ribbon is exhausted from the spool' and releases said bridge. substantially as set forth'.y
In a typeivi'iting machine, the combination of a ribbonspool havingV a recess inA one end ivith asurrounding circular track having an opening therein, a bridge closing said opeiiiiig,aiid ribbon reversing mechanisin including 'a trip device- Whichtravelson said track, and a4 ribbon coiled around the track and bridge, substantially as set forth.
30. In a typeivi'iting machine, the. combination of-a ribbon spoolhaving at one end a circular track with an opening therein, a4
ribbon feed reversing mechanism including av trip device which travels .'on said circular track, a pivotcd bridgenorrnally closingthe opening .in said track and forming a part ofthe track, and a ribbon'secured to the bridge for opening iti when the ribbon-is exhausted from the spool,v substantially las set forth.
`3 1.. In a typevvriting machine, thefcoinbination ofa ribbon spoolhaving a. circular.
Wall 'with an opening,` ribbon feed-mechanism including a trip device which travelson said circularivall, a bridge closing the opeiiing in said Wall, anda `ribbon attached to saidi bridge and lacting to ol en the saine. 4when the ribbon is exhausted rointhe spool and to close and secure thebridge when -ivound upon the spool, substantially 'as set forth.
having an extension at the other end overlapping said track, a .ribbon secured to said 'bridge for opening and closing the saine, and l ribbon feed reversing mechanism including a trip device which travels on said track and is adapted to enter said opening,- siib-v stantially as set forth.
33. In a typewriting machine, the combination ofa ribbon spool having avcireulai- 115 32. In a typeivriting machine, the combii nation of a ribbon lspool having a circular track with an opening;l therein,fa bridge closing said opening and pivoted atone fend and track with an opening therein, a bridge clos-- ing said openingandpivoted at one endto the spool, said bridge having inner andfouter ribbon holding parts, and ribbon feed reversing mechanism including a trip vdevice` which travels on said track and is adapted to enter said opening, substantially asset f orth. 34-. In a typewriting machine, a ribbon .spool having a circular track at each 'end adapted to surround and co erate with a- Vribbon feed reversing trip, an sa supportingspool shaft on which the spool is reversible,
substantially as set forth.
35. 'In a typewriting machine, the combi nation of ribbon spools arranged'at opposite sides of the machine, means for feeding the ribbon from one spool to the other, 'arotatable reversing shaft extendi.n"g 'transversely of the machine at the upper lfront part therey of with its -end portions adjacentto' said spools, and means operated by turning'said shaft for reversing thel ribbon feed, .substantially as set fort f 36.- In atypewriting machine,the,combi nation of ribbon spools supported'atthe up'- v per. front part of the machine, means for f feeding the ribbon from one lspool tothe other, a -reversing shaft having an intermit- -tent rotary motion extending across the front upper part ofthe machine, and means .tent rotary motion extending across the front upper part of the machine, and means operated by said shaft for alternately changing the direction of the ribbon feed, substantially as set forth.
In a typewritingmachine, the combination of ribbon spools arranged at opposite sides of the front part of the machine, means for feedinl the ribbon on the spools, a rotatable sha extending transversely of the machine with its opposite ends adjacent to said. spools, and means operated by said'shaft for disconnecting the feeding means from one lspool `and simultaneously restoring the feeding means` to the other spool, substantially as set forth.
In a typewrting machine, the 'combination of a pair' of ribbon spools, means for driving' the spools to feed the ribbon, a
powerdriven rotatable shaft arranged with a portion thereof in the vicinity ofp each of said spools, and means operated by the rotation of said shaft for reversing the feed of the ribbon, substantially. as set forth.
40. In a typewriting machine, the combination of ribbon spools supported at the uper front part of the machine,means for ceding ,the ribbon onto the4 spofols, a powerdriven shaft-extending across the machine, and means operated by the rotation of the shaft for reversing the feed vof' the ribbon, substantially as set forth.
.411 In a typewriting machine, `the com bination of ribbon spools, means for feeding the ribbon'onfthe spools, a power-drivenrotatable shaft, means operated bythe rotation `of lsaidshaft for reversing the feed of the ribbon, and trip means controlled by the ribbon and acting to automatically release said shaft and permit it to act when vthe ribbon is exhausted from one spool, substantially as set forth.
42. In atyp'ewritingmachine, the combination of ribbonv spools, 'a power-driven shaft-,means operated by'the lrotation of the "shaft in one direction for reversing the feedl of the ribbon, the vrotation of said shaft in the-opposite direction acting 'to store pofwer in' its power driving means, and means controlled by the ribbon and acting to autoact when the ribbon is exhausted v'from one spool, substantially as set forth.
43. In a typewriting machine, the combination of a pair of ribbon spoolsmeans for feeding the ribbon von the spools, powerdriven .mechanism [which derives its power independently of thecarriage driving motor and of the ribbon for reversing lthe ribbon feeding means, and means controlled bythe ribbon for automatically releasing said power-driven reversing mechanism,l substantially as set-forth,A
44. In a typewritin nation of ribbon spoo s, means for feeding mechanism independent ofthe carriage driving motor for reversingthe ribbon feed,
means controlled .by the ribbon for automatically releasing said reversing `mech anism, and means for vmanually winding said spring, substantially as setforth.
spring when once wound to reverse the ribbon feed'a plurality of times, and control-f ling means fory automatically releasing said machine, the combi- `maticallyrelease the shaft and permit it` to the ribbon on the spools, spring-driven l spring mechanism to reverse the ribbon feed Whenever the ribbon is exhausted fronionc of the spools, substantially as set forth.
4 6. ,In a typewriting machine, the combination of ribbonspools, a carriage driving motor and connections for feeding the ribbon on'the spools, and a spring-driven mechanism which derives its power independently of the carriage driving motor and of the ribbon for automatically reversing the ribbon4 feed whenever the ribbon' is 4eX- 110 45. In a typewriting,machine,' the combi-v -each spool havinga separate 'guide slot for hausted from one of the spools, substantially .as set forth.
4:7. In a typewritingmachine, the combi- 'natlon of a pair of ribbon spools, a plurality of 'ribbons wound together face to face on said spools, guides for holding said ribbons -from contact adjacentto the spools, and
separate guides for saidi'ibbonsadjacent to i the platen, substantially Vas s'et forth.
48, In# a typcwriting machine, the combination 'of a pair' of ribbon spools, a plurality of ribbons Wound together face to face on the' spools, and a guidefor the ribbons near each r1bbon,substantially as set forth.
49. 'In`a typewriting machine, the combination of a pair of ribbon spools, a pair4 of ribbons Wound on the spools, la vibrating carrier,- a pair of guides adjustably mounted on the carrier tohold oneribbon laterally in advanceof the other with relation to the 'one of the guides'having provision for placing either of two portions of itsdribb'on in position to be vibrated to and from the printing point, substantially as set forth.
51. In a typewriti'ng machine, the combi nation of a ribbo1i,a vibrating carrier, .a
ribbonguide mounted' on' the carrier, arocker centrally pivoted to the carrier and.
connected with the guide, and a manually movable part for shifting said rocker to alternatelyfraisel and lower the guide on the carrier, substantially as set forth.
In'a typewriting machine7 the combi-v nation` -of a ribbon, a vibrating carrier,'a ribbon guide having a projecting pin snp- .portedbythe carrier, a pivoted rocker` having a'slot'receiving said projecting pin, and means for rocking said rocker on its pivot,
` substantially asA set""forth.
6 3. In a typewriting machine, the -combination of a pair of ribbons, a pair of ribbon guides, a vibrating carrier for said guides, a rocker pivoted on said carrier and connected to said guides, and means for rocking saidrocker to shift said indes on'the car-m.l
rier, substantially as. set ortli.
541 In a typewriting machine, the combination of a pair of ribbons, a'vpair of ribbon" guides, a vibrating carrier for said uides, a rocker .pivoted on said .carrier an vof the ribbons, substantially as se't forth,
conneet-ed to said guides andhavingoppositely inclined edges, land pivoted lever and operating means yfor alternately engaging said inclined edges of said rocker to rock itin opposite directions, substantially as 'set forth. v
55. In a typewriting machine,` the combination of a pair of ribbons, a pair of ribbon guides, a vibrating carrier for said guides, a rocker pivoted on said carrier-.and connected to said guides and having oppositely inclined edges, a lever pivoted to swing-hori- Zontally to engage either lof said'inclined edges and vertically to rock said rocker, .means for swinging said lever vertically, and
means for normally holding said `lever cen.-A
trally relative to saidv inclined edges, substantially as set forth. I
56. In a typewriting machine, the combination of a ribbon, a ribbon guide, a carrier on which said guide is adjustably mounted, and tWo parallel links pivotally connected to ,the carrier at their front ends and to the machine at their rear ends for' m'ovably sup-A j portingthe carrier in upright position, and
'means for vibr'ating'said links to raise and lower said carrier, substantially as 'set forth.
57. Ini atypeivriting machine, the combination of a ribbon, a carriage, a shift frame for the carriage, a vibrating ribbonmcarrier, y
lsupporting links for said carriei"pivotally connected to said shift frame'and to saidcarrier, and means for vibrating said links` substantially the samedistance with theshift frame in either of its positions, substantailly as set forth. l.
58. In a typewriting machine, the combi-- nationl of a ribbon, -a carriage, a shift vframe pivotally connected tothe shiftframe and t0 the` carrier, and means for vibrating said links substantially the same distance With.`
the shift :trame ineither of its positions, substantiallyas set forth.
59. 'Ina typewritingmachine, the combi- ,nation ofa carriage, a carriage shift frame,
'a ribbon, aribbon guide, a carrier for said ribbon guide, links-pivotally supporting said o for the carriage, a ribbon guide, a. carrier on v lwhich the guide is adjustably mounted, .links carrier from said shift frame, means connectedI t'o one of said links for vibrating said i' carrier inA different positions of the shift frame, a lever pivoted to said shift frameffor shifting said ribbon guide on said carrier,
. and means connected to said lever for operating itin'diiferent positions of the shift iframe', substantially'as set forth'.
60.'-'In a typewriting machine, the "combi-A n ation'of 4a pairof ribbon spools, a pair of rlbb'ons Wound-on said spools, and anequalizingf device for takiiigfup the slack in either 61. In a typewriting machine,the.eo1nb`i' nat'ionof a pair of ribbon spools, a pair'of `ribbons Wound on the spools, and a springactuated device i'o equnlizilng the tension of pait to bear yieldingiy against either ribbon, l
the ribbons, substantially :is set forth. substantially as set forth. 13
G2.' 'In e typewiiting machine, the oombi- Witness my hancil, this 27th day of April, nation of a pair of ribbons, means for feed- '1907. I
ingseid ribbons together lengthwise, and a EMMIT Gr. LATTA. device for eqnahzmg the tension of said riby Witnesses:A 'A bons consisting oi a partei-ranged between FRANK E. REID,
said ribbons` und. ineens for causing' said Gmo. F. RANsoM.
US37131507A 1907-05-01 1907-05-01 Ribbon mechanism for type-writing machines. Expired - Lifetime US933652A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494612A (en) * 1947-10-31 1950-01-17 Nathan E Goldberg Separable moving picture film reel
US4416199A (en) * 1982-09-01 1983-11-22 Norwood Marking & Equipment Co., Inc. Multicolor imprinter
US4630951A (en) * 1985-08-05 1986-12-23 Tokyo Juki Industrial Co., Ltd. Ink ribbon and correction tape lifting mechanism for a typewriter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494612A (en) * 1947-10-31 1950-01-17 Nathan E Goldberg Separable moving picture film reel
US4416199A (en) * 1982-09-01 1983-11-22 Norwood Marking & Equipment Co., Inc. Multicolor imprinter
US4630951A (en) * 1985-08-05 1986-12-23 Tokyo Juki Industrial Co., Ltd. Ink ribbon and correction tape lifting mechanism for a typewriter

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