US1665736A - going - Google Patents

Description

3 Sheets-.Sheet 1 April 10, 1928.

G. G. GOING TYPEWRITING MACHINE Filed Sept. 50. 1925 WITNESEEE April 10, 1928. 1,665,736

G. G. GOING TYPEwRTING MACHINE Filed Sept. 30,. 1925 5 Sheets-.Sheet 2 INVENToR. wlTN EGEEG 7 ATTORNEY s sheds-snm 3 Ap l0, 1928.

- G` G. GOING TYPwRITING mamma Filed sept. 50, 1925 INVENTOR.

ATTORNEY WlTNEEEES Patented pr. 10, 1928.

GEORGE G.' come, oF MInnLnToWnoonnncrionnnssienon, BYivLEsNn AssIGN# i MENTS, To REMINGTON-TY1EWRITER coMnANYrn coRBoRATIoN or NEWYORK..`

im,frnvvnrrneS MACHINE ,l y,

Appnjcation flied september so, isasgsiiarno. 59,623.

My invention relates to ribbon mechanisms ject is to provide a complete ribbonmecha-f nism for such macliinesVsaid niiechanismbeing capable of performing all of the usual functions characteristic oi" such mechanism. Stated more specifically the objects of my invention are toprovide new and improved feeding mechanism, vibrating mechanism, field-changing mechanism, and reversing mechanism `tor the ribbon. 4 y

To thejabove and other ends which Will hereinafter appear, my invention consists in the features ofconstruction,combinations ot 'devices and arrangements of parts hereinafter described and particularly pointed out in the claims. 'h 1 A As illustrated in the accompanying drawings, the preferred torni of my `invention is shown as` applied to a No. G` Remington` Noiseless typeivriting machine, although'it is to be understood that the various features ot the inventionare readily applicable in l Whole or in part to other styles of Writing;

machines.

y In the drawings,

1 isa fragmentary front-tosrear vertical sectional view taken about centrally of the machine, only so much thereof being shown as is necessary to a ullunderstanch ing' otthevinvention. y y vFin; `2 isV a fragmentary horizontal sectional vievv taken on a plane indicated by the section line 1 1 in Fi l and looking; dotvnp Ward in the direction of the arrows atsaid line.

`v Fig. il a 'fragmentary vertical sectional View taken on a plane indicated by the section 'line 2-2 in Fig. l and looltingrear- Ward in the direction 'ot the arrows atsaid line.

Fig. Ll; isla construction. p

appears 'from the drawings, the main traineoil Jdie machine comprises'sidc plates 1 'which are connected at the trontbyia'cross piece, not herein shown, but which is term-ed integrally with the sideplates. Said plates l are also connected by a rear plate and suri'nounted by a top plate ll only tralginentarily illustrated. The upper parts ot vthe side plates l are connected at the front by a cross platcQ which is secured `by screws 8 to luggs 4 infojecting inward from the side plates. The platen 5, diagrannnatically `illustrated `in liront elevation-oil a detail of Figlhis .mounted on a carriage not shown) which is adapted totravel iback aindffortli on a grjooved trackQWay or trough,'pvairtlot'l Which'f ',sliownand numbered (5;` 'Coopera-` tive with the front `face of the platen `are a set of type bars,not herein shown, `each type' bar being operative by atrain oticonnecti'ons comprisingasublever 7 having a. stationary pivot 8 and connected byY atlinl; QWithl'a key leverl()y provided at'i'tst'ront end with a hey#v cap or ley 1p1 and pivotally supported at'l2 towards the rear ofthe machineffEach'sub-i y leverf has enrolling connection with a'driving lever lvivhich has a stationary'pivot 14.

Suspended from the driving lever at l'is a link 16 the lower end portion Wherefis bifurcated ory forked to embrace erstraddle a horizontally disposed arcuate universal bar `vvhich is part of Va trame lfhaving extensions such as 19'." The extensions arc `pivotally connectedatQOWith arms21 fixed to and extending rearvvarcil` from asquarc rock` shaft 22 that is pivoted on pivot pins 23 adjustably secured in ears 24.# projecting from the side portions 25a of a yoke or cross bar'Q that extends from side to `side of the machine and 4is secured to the'side' plates VLl; The .rock shaft 22 has operative connections tothe escapement mechanism of the machine not herein shown.` The parts hereinbefore referred to arecommon to the No5 6 Remington-Noiseless typewriting machine and need not `be Ydescribed at `greater' length.

The ribbon 26 `herein shown is divided intolongitudinal stripes, zones or kfields,

designated as a and Z2, and having dil'erent` colors on characteristics"The ribbon is Wound on rotary carriers or spools arranged at opposite sides of the niachineaboif'e the top plate.y 'Each carrier, designated asa Whole by the number 27, comprises a hub or core portion 28 and 'flanges 29 Vand 30, the top flanges or headsbeing detachable, the spools being arranged in housings or easings .31' detachably secured to the top plate '1a. The, spools are mounted at-the upper-'lend portions` of vertically arranged shafts 32 which bear near their `upper ends in bushings 33' in the top .tplat`e,thel lower endfpo'rtions of said shafts bearing Vin lugs lb lprojecting' inward Jfrom the side plates rl'. The shafts 32 are hollow :and each carries in its lower end a yblock or` plug/,'34, and arranged outsideot the shaft below the flug 1b is a beveled 'ivheel 'havin'g a hub'portion 36 which receives a set screw 37', whereby, the beveledwheel is secured to the shaft. Adapted to mesh alternatively with the beveled wheels are beveled pinions38 secured; by

setscrews '39 to a. horizontallyA arranged' driving shaft 40 that extends from side to side of the machine and bears rotatably and slidably in the side plates 1, the right-hand end portion of said shaft projecting outside the" side rameandhaving secured to it ahandle 41 for manually turning and* shifting the drivingA shaft'.

For automatically turning the shaft 40, connections are provided to the rock shaft 22,.said connections comprisinga crank arm 42 having a: jaw-like or U-shaped lower end; portion which embraces the rock shaft 22 and" is clamped.v or secured theretoby a clamping-screw 43 that connects the tree end portions of the U-shaped' end.4 The crank arm 42 projects upwardfrom the rock shaft and. inclines slightly rearward, its upper end portion being connectedpivotallyat 44 with a rearwardly and downwardly extendingv pawl-carrying member 45 that is off-set upwardly to provide an arm. 46 which terminates in a U-shaped laterally extending portion 47, the cross portion of which is beveled at 48. There isthus provided1 a U- shapedfpawl. 47-48 at the end of the Larm 4.6.y Pivotally connected` to the member 45 at 49 is a rearwardly extending arm. 50 parallel. to the arm 46 and which alsoterminates in a `[Ll-shaped4 laterally extendingA portion 51,k the cross portion of which is beveledl 0r shaped as indicated at 52 to provide ay pawl tooth.. It will be observed thatthe edges or teeth 48 andy 52 are oppositely disposed, the former being at therear side, and the latter at the front side of their respective cross portions or pawls. The parallel arms 46 and 50 are connected by a draw spring 53 which tends constantly tol draw the pawl arms towards eachother and to maintain thel pawl teeth 48 and 52 in operative engagement with a ratchet wheel 54 having a hub portion which receives a set screw 56 whereby the ratchet wheel is securedl to the ribbon driving shaft 40 just to the right of the left-hand driving pinion 88. The U-shaped pawls loosely embrace the ratchet wheel 54. The construction issucli that at each operation oi a printing key lever 10 the link 9 actuating the sub-lever 7 and the driving lever 13 will cause the latter, through the forked link 16, to depress the universal bar 17, causing the arms 19 that are part of the universal ybar frame to act on the crank arm 21 and rock shaft 22.- The motion of the rock shaft will be transmitted through the crank arm 42 to the connected pawl carrier ormen'iber 45 which will be moved rearward causing the pawl arms 46y and 50 to move rearward and. downward.. During this movement the pawl tooth 4S, co-acting with the teeth of? the ratchet wheel?. 54 at; the upper side thereof," will Aturn the wheel' in the direction of the arrow in Fig. 1. At the same time the pawl.` tooth 52l will slide or click idly over theratchet tcethat the under; side of the wheel 54, the pawl teeth being held by the spring 53 in contactive engagement with the ratchet wheel. When the actuated printing key leveris released the parts will be restored to normal position by the several restoring springs, the pawl arms 46 and 50 being retracted as the shaiit 22is rocked Vtornard. During the retracting movement the pawl tooth 52 will co-act with the ratchet wheel to turn it inthe direction of the arrow in Fig. 1, while the pawl tooth 48 will click idly over the' wheel. In other words, by means ot the double-pawl constructionv the ratchet wheel 54 is turned both during the actuation of the printing keysl 11 and also during their return movements. The turning movement of the ratchet wheel' 54 is of, course communicated to the ribbon driving shaft 40, and the driving pinions 38. yAs will be apparent from F ig. 3, these pinions are so located on the driving sha-ft relatively to the beveled wheels 35' that only one pinion 38 and' its associate wheel 35' can be in mesh at the same time, the other pinion and wheel being then disengaged. As a. consequence the turning movement of the engaged or intermeshing pinion 38 and wheel/35 will be transmitted to the connected spool shaft 32, causing it to turn its spool 27 and wind the ribbon thereon, the ribbon at the same time being drawn oiii` or unwound from the companion. ribbon spool at the opposite side of the machine.

The ribbon 26 is led :trom the spools 27 through slots in the casings 31, and; midway between the spools the ribbon is threaded or passed through a vibratory holder or vibrator 57. The ribbon vibrator or carrier 57 is made `preferably of sheet metal and comprises a U-shaped body portion 58 having its sides bent forward and with slots indicated at 59, the slots being formed with outlets or mouths 60 through which the ribbon may be introduced or threaded and withdrawn. Rightward from the body portion 58 extends an integral arm 61 terminating in an upright extension 62 which is pivoted at 63 on a. bracket or arm 64, the lower' end.` ot which is secured by screws 65 to the front vertical face of the trackway part 6', the arm 64 being oit-set rearward so that its lower end is in the plane of the tracliway. The vibrator is thus pivoted in front of the platen `at one side of, the printing point and slightly lli) tionot. a horizontal rock shaft 72.

inateri al.

the link beingpivotally connected at 70 to y the :upper end. o'l a .crank arn'i 7l that is iixed at its lower end tothe rear end por- Adrawspring' 73 connects the crank arin 7l with the .vibrator` 57. at thev elbowtorincd by the junction-ot the arms orportions 6l and 52. rlhe roei; shalt 7 Qwhich extends .towards the .iront oit the machine takes bearings in lugs Tl projecting inward tron'rthe right-hand side platel. `At its forward end said rock sha'lt `earriesa horizmital leltwardly extending crank arm 7 5 which is formed between its endsiwith a depression 7 6. Adapted 'z riablyy to engage with the crank arm is a link or connector' 77 the upper end ot `Which is slotted aszindicated at 77"L to engage slidably with the crank arni 7 The lower end ot'the link is pivoted at- 78'to an ear or extension 79 which is part of an. angular supporting member 8O having at its letthand end a forward extension 8l that tei-,

ininates ,in a jaw or U-shaped portionS)J thatlits overa square rock shaft 83. and is screwed thereto, said rock shalt bearingy on pivot screws 841:` adjustably secured to earslit in* tegral with the cross bar 25. A second an- `gular arm connn'ising,` a U-shaped poi-tiener Jaw S2 enibraeing the shait 83 andscrewed theretois arranged at the lett-handend portion ot said shalt 83, said angular arin hunA ther `comprisinga rearward portion 8l and an angular extension Sl, .The two angular arinsl provide support for a straight universal bar that is arranged under the set oi' key levers 10 in a position to be actuated by vthem when they are depressed. Said iuiiversal bar is li-shaped in cross section` beingctornled preferably ot sheet inetaL and its upper Harige is :termed with slits lo at short intervals, these seuoarauting` or dividing.; the flange into a'series oiI tongues $57 or individual` Contacts. The tongues `'are settieiently tlexible to yield when ei'lgragi'ed by the key levers 10. Arranged inside thenniversal bar is a strengthening strip `88 ot suitable The universal bar is secured by screws 89 to the supporting arms til,4 the screws 89 likewise starving'` to hold the strengthening `strip in place. When a `key lever is depressed it will act on the universal bar Causingit to swing about the axis ot the shaft 85%, this motion benigtransnntted through the link 7 7 to the crank arin 7 rocking` the shaft 72 and swinging lettward portion 93 res portion ot the ribbon in the pat-h. oit the oncoming typey bar, as islwell understood. liVhe'n the actuated keyis .released the parts will be restored to norn'ial `position7k the` vilnating;` train being,` restored by the spring' 73 and by an additional rrstoring"spring 90 which is eoi'n'ieeted at itsloiver end to aproection 91 on the link 77 and at its upperend to a switch hereinafter described. The universal bar 8:3487 in association Wit-h the strip 8S is Yfound to lniniinime the-noise due to the` strikingv ot' the key levers againstV it so that setuid snhstf'intially` eliminated. Prefer? ably stops are provided tor limitingdown@` ward inovenient ot the universal harto-87, y nach Stops being in the torni ot pads 87" otl liber lor the like, mounted on adjustableholders 87 that are supported on 25 trom the cross bar 25.

Means `are provided ttor at will changing the throwv or extent of vibratory inovenient ot the ribbon holder or: vibrator 57 1n order that eitherfof the tields or zones and Z),

f and settingl the link 77 in varyingpredeterprojcetions4 inined relationships with the crank arin 75.

Said. switch, designated as awhole yby the reference nuineral 92, is preferably n'rade o a singlepiece'ot sheet nietal ent and shaped to provide a U-shaped body port-ion 93 and a rearwardly extending arin 941-. Said `arm 94. is enlarged at its rear end and formed With an open-mouthed slot 95 which loosely embraces `'the upper end portion of the linkv vThe upper end 77 belov,T the crank arin 7 5. ot the spring 90 1s anchored to the enlarged end portion oli the arm 94C. The parallel horizontal sides is in the tornil ot'a :vertical .Screw 96 having.;l an elongated shank, the lower end ofthe screw being y l disposed lng projecting inward troni the right-hand sideplate l. The Usshaped body ts on and isI supported by 'the lug;- 97 and ia adapted tov turn on the screw 96 as a pivot. the top and bottom sides o'l. the body peetion 03 being" eonlined between the head of the screw Q6 and the upper tace of the lng or projection 97. r)The pivot screw 96 is held rigidlyon the lng 97 by a Clamping nut 98 end ofthe `screiv 9G projecting below `the under itaee ot `the lue; 97. Spring pressure is applied to the switch 92 by a U-shaped springltl which 1s hooked around 'a pinltl()` on the switch, the opposite end ot'l said spring; being' hooked over or anchored to a pin lOl on the hip; 97. For Controlling the switeh 92 there is provided a key or` finger piece inthe .torni of the knnrledhead102 et a shankltll` Secured `to the angularly oli-- set portion .1.042 ot an arin 1054 which.. is,

ofthe body portion are pertorated to recon/ea pivot member which' tvhieh threaded on the lower;

threaded into a horizontally llt) pivoted on a screw 106 at the rear of the body portion 93, so as to enable the handle or finger piece 102 to be moved up and down about the screw pivot 106 independently of the switch while at the same time participating in lateral swinging movements of the switch about the pivotal center 96. rlhe shank 103 projects forward through an opening 107 in the front plate2, the lower side of said opening being formed about at its middle with a depression or notch 108. Adjacent the opening 107 the front plate may be provided with the usual color indicia with which the shank and head 102 cooperate as a pointer. lli/*hen the shank 108 is in register with the notch 108 it may be pushed downward so as to seat in said notch, thereby locking the switch against lateral movement. The parts are so constructed and proportioned that at such time the link 77 is in register with the depression 76 in the arm 75, theconsequence being that when. the link is pulled down at actuations of the keys 11 the link will play idly in the depression 76 and will not affect the crank arm 75. ln other words, the ribbon vibrating mechanism will be rendered ineffective, as is desired when mimeographing is being done. Gn raising the shank 108 outof the notch 108 the switch 92 may be swung on the center 96 either to the left or right, that is, further from or closer tothe pivotal axis 72 of the arm 7 5. lrWhen the switch is in the Fig. 2 position the link 77, acting on the arm 75, willlift the vibrator to its lesser extent, raising the upper field a to the types at printing operation. By switching the member 92 towards the right the. link 77 may be slid rightwa-rd along arm and reset close to the pivotal axis thereof, so thatv at printing operations a greater throw will be given to the vibrator, sufficient to present the lower lield Z) to the types. ln order to limit the sidewise or switching movements of the switch 92, a stop plate 109 is provided, said plate being horizontally disposed and having at itsrear end upright projections or stops 110 and 111 for cooperation with the sides of the arm 94. The .stop plate 109 is secured to the. underside of the lug 97 by a headed screw. 112. The stop 110 limits the movement of the switch 92 towards the left, while the stop 111 limits such movements towardsthe right. It will be under stood that the notch or slot in the switch 92 by loosely embracing the sides of the link 77 will maintain the link at varying predetermined points lengthwise of the crank or operating arm 75 without7 however, interfering with actuating movements of said link which will slide or move up and down through the notch 95 during printing operations.

Means are provided for reversing automatically the direction of the ribbon feed,`

memes:

so that when the ribbon is fully wound on one spool, leaving the other spool bare, it may be fed back again until completely rewound on the bare spool. The ribbon reversing meansare preferably controlled by the inner plies of the ribbon on the spools and comprises bell cranks 113, one for each ribbon spool. at. 1.11 on ears 115 bent inward from the spool cores 28. The depending arm of each bell crank 113 terminates in a nose 116 which projects outward through a vertical slot-way 117 in the spool core. 'lhe horizontally disposed arm of cach bell crank 113 projects inward througha kerf 'or slot-way 118 in the associate shaft 32, and terminates in a hook-like portion 119 from which is suspended a rod 120 that extends downward through the bore of the shaft 32 and normally terminates just within the lower end of the said shaft, as shown by full lines in Fig. Preferably the end'portion of each rod 120 is formed with a circular groove 121 to insure proper cooperation with an abutment, later'described. lt will be understood that each rod 120 lis held within the shaft 32 by the associate bell crank 113, and that the bell crank is maintained in a position effective to accomplish this result by the inner plies of the ribbon 26 which are wound on the spool core and cover the slot 117, preventing the nose 116 from being pushed out through the slot by the weight of the rod 120. lt will be further understood that when the ribbon has been completely unwound from one of the spools, uncovering the slot 117, thenose 116 will be freed, permitting the rod 120 to drop down through the force of gravity until its notched lower end is exposed below the lower end of the shaft 32. 'lhisresults in setting in operation a` train of reversing mechanism which theretofore has moved idly at each actuation of the printing keys. There are two of such trains of mechanism, one associated with each ribbon spool and comprising an angular member or bell crank 122 having a rearwardly extending arm 123 which is adapted to vibrate in a horizontal plane just under the lower end of the associate shaft 32, said angular member further comprising an inwardly extending arm 124. Each member or bell crank 122 is pivoted at 125 to the under side of a bifurcated supporting member 126 which in turn is pivoted at 127 to the under side of a lug or projection 128 extending inward from the adjacent side plate 1. The bell crank 122 is pivoted to the shorter arm or bifurcation 129 of the member 126, the longer arm 130 of said member extending rearward and inward and terminating in a` rounded portion 131 which fits in a circumferential groove 132 formed in the body portion of the associate driving pinion 38, thus connecting the member 126 Said bell cranks are pivoted.

ber 1.

VLeesmee with `the ribbon driving shaft'40 so that `pivotal movementsof the member will be transmitted to` the shaft, moving' it endwise. At the saine time the connection is such that=r0- tary movements of ,the shaft will not be interfered with, the groovedportions 132 of the driving pinions turning freely over the rounded portions 1310i therinembers 126. Each arm 13() is preferably provided 'with a downwardly bent and rearwardly extending finger 133 which underlies the shaft 40 and prevents displacement of the member 126 inan upward direction, suchas would disconnect the rounded end 131 from the groove 132. The angular members or bell cranks 122 are connected by trains of devices witlitlie rockshaft '22 so as to receive impulses whenever the printing key levers are depressed. Eachtrain of devices comprises a link 134 pivoted to the arm 124 at 135, said link extending forward and terminating vin an upwardly bent 'ear 134L whichis nivotally connected at 135 with the depen ing arm of a bell ciank 137 pivoted on a pivot screw 138 which is secured in `a boss `139 on the adjacent side plate on frame niem- The other arni of the bell crank137 carries a' pin 14() which. engages loosely'in a slot 141 `formed at the rear' end of' an arm 142 which extends downward andfoi'- ward, terminating in `a U-shaped or jawlik'e portion 143which fits over or embraces the `rock shaft 22 and is clamped thereto by 4a clamping screw 144. When, asl eX- planied, the shaft 22 is rocke'd'rearward on `depressions ofuthe printing key levers 10,

the `arnis142 will be swung` dowi'iward,l turning the connected bell cranks '137 and causiii'gthenito pull forward the links 134, `these in turn actuating the* angular members 122 and swinging their `arms 123 inwardpast the lowerends of the shafts 32 and the rods 120 housed therein. ,VVhenj the keys are released i the parts are returned to normal position,

' the arm's123swinging back under the shafts It will be understood that during these vibratory movements of the members 122 on their pivotal centers 125 the members 130 will not be affected, so that `pivotal cen-` yters125 will remain stationary, as will of course Vthe roundediengaging,portions 131. lhen, however,` the ribbon is completely unwound from one of the spools, allowing thee-sso'ciate rod 120 to drop downntotho dotted line position shown at'tlie left' in- Fig. V3, the groei/ed portions`12'lf ofthe rod `will obstruct'tlie'lpatli of the arm 123 acting as an abutinentor obstruction to `preventfor block further pivotal-iii`ovementof the bell crank `around the center 125' after the ariii1`23-lias' coii'tac'tedwiththe rod. As a consequence further` forward pull on vthe link 134 will be transmitte'dthrough the bell `crank 122 to the member 12G^which`hereto fore has .remained quiescent, causing said member `togswing' leftward on itspivot 127. Thisoperat-ion will be clear from a consideration of Fig. 2 which showsthe arm 123 of the left-hand bell crank 122 positioned as blockedk by the ydrop rod 120. At this time n the pull` of the left-hand `link 134 will be tothe left side of the pivotalcenter 127, and

`since the bell crank 122 is prevented from `turning freely on its axis 125 the main ef- .feet of the Vlink will be on the member `126r which will be forced to yield, andas it turns `willinove the driivingshaft 40`leftward `in a longitudinal direction, causing the rightliand pinion 38to separate from its gear wheel a'nd bringing the left-hand pinion 38 into contiguity to itsgear wheel `35. The

final stage of the left-hand shifting moveinent-` of the shaftl is assisted by certain spring actuated toggle devices as hereinafter described. 4The parts are soproportioned and expeditiously accomplished. lVhen the feed lof the ribbon is `reversed `and it starts to rewind on theempty spool, the nose116 of the bell crank 113 will be forced `inward `toward the spool axis, causing the bell'crank:k

to lift` theidrop rod 120,1out of the path of thearm 123. f

^ In order to vassist the driving shaft 40 to complete fully. its` longitudinal shifting movement, detentor toggle devices are pro-ei vided, preferablyfcomprising a pin 145 carried bythe `free end` of an arm 146 and pro- `jecting` up into the right-handgroove132.

The arm 146 is part of a bellqcrankthat.furthermcoiiiprisesV` an yinwardly extending arm 14,7, thebell crank 146, 147 `beingpivoted at 14'8't0 the underside ofa plate 149 that is secured by screws 150 to a` stationary cross bar 151. limited by a pin 152 carried by the arm-147 and adapted to: play ina circularhole 153 in the plate 149, The inner end of the arm k147 is pivotally connected at154 with` a link `155 which-is also pivotally connected'at 15b `with an arm 157 pivoted at 158 tothe plate 149. Aidraw'spring 159connects the arm `f157 with the` plate 149 pand' constantly tends `topull said arm rightward about its pivot 153-' The arm 147 and the'link 155.0011- st'itute in effect a toggletwliisch whenfcarried slightly, past'the straight line'l position `in either direction is `furtherbrok'en bythe ac- Moveinents of vthe bell crank are tioii of the spring 159: A"l.`hatwis`,`fthe action of each member 126'is sufficient to actuate the toggle" from one of: its broken positions (one'of which is shown. in Fig. 2),athe`n'to straighten it and carry'rit 4sliglitlyfpast `the straightlline position, whereupon ther spring 159 becomes effective fn'rtherfto vcoinjgilete'the toggle movement,"land as aconsequence, the* eo'athe downward swing of the :arm

`riiglittline movement of theshaft 4() with which the toggle is connected by the pin 145 and groove 132.

In-viewof what? has been said heretofore,

5 itis not believed to be necessary to enter into -a detailed explanation of the mode of operation of the entir-e mechanism, but one or two points may be adverted to. Referring` to the construction of the universal bar SMS?, the

l slitsl 86 are continued through the full width -offthe upper flange and penetrate slightly ydown past tli-e upper corner of the bar and into the front vertical portion thereof. The flexibility of the tonguesv or contacts is therel bypromoted. Also to'this end the U-shaped universalbar or channel bar is made of extremely thin'sheet metal,'the additional device or strip SES being employed to stilfen or strengthenit. The upper tongued porftions of the bar 85-87 are inclined slightly lto the horizontal so that the key levers when depressed will first contact with lthe rear free ends of the tongues which are so flexible 'that they yabsorb the shock of contact of the -key levers and aslthe -key leversare further depressed willyieldor give sufficiently to enable the bottom edges of the key levers to ride over the tops-,of the vtongues and finally come to reston the corner of the universal barfjust at the upper bend. This results in Van-easy and quietaction-of the key levers on the universal bar through the-tongues l' due to thfeiryieldingor flexibility, whereby noise is substantially eliminated. Owing to `at? the elasticityof the tongues, they return ytoinorm'al position asthe key'leverascends.

During ribbon vibrating operations, when the mechanism is set for printing from'the lower-'field 1 ofthefribbon 26, upward move- 40 `ments of the vibrator will bevlimited by contact ofthe pin 66 with the left hand side offthehole (57,1thepin and theihole providing stop devices to prevent excess movement of theivibratorand so that the printing field will always be within -the 'lower edge of theribbon. vPreferably stop devices are also provided for `limitingithethrow of the vilbrator when the mechanism is set for print-' ing in the upper field t of tlie ribbon 26.

Said stop devices are illustrated in Fig. 4

and comprise the downwardly extending or nose portion 75eA of the crank arm 75. Vhen the link 77 is set in the -position 'furthest from therock shaft TQ'as-shown in this'figure the outer end portion of the arm 94 will ciently to carry the loweredge of ythe rib- 11,06 avec bon field a too`far,1tlrus preventing any tip- -ping or printing of the `lower portions of ynecessary functions of feeding, vibrating,

and reversing the ribbon as well as changing Vribbon fields or dispensing with the use of -the ribbon, all of'these functions being accomplished readily and effectively by means comparatively snnple in construction and 'which canbe economically manufactured.

Various iconstructional changes may be made without departing from my invention, and'of1course some of its Afeatures may be made .use yof without others in association withJribbon mechanism of other forms or styles.

lVhat-I claim as new and desire to secure by Letters Patent, is:-

l. 'Infa typewriting machine, the combifnation of ribbon spools, a ribbon driving shaft-therefor, a ratchet vwheel operatively connect-ed with said'shaft, a pair of pawls constantly engaged with said ratchet wheel, printing key levers, type bar actuating devices connected with said lev-ers, a universal bar operative by certain of said devices, a 'rock shaft connected with said universal bar, aqcrank -arm on saidfrocak shaft, and a pawl carrying ymember pivot-ally connected directly to said crank arm .and carrying said pair of pawls.'

2. In a typewriting machine, the combination ofiribbon spools, a/ribbon driving shaft therefor, aratchet wheel connected with said shaft, a ypair of feeding pawls constantly engaged with said ratchet wheel. printing key levers, type bar actuating devices connected with said levers, a universal bar operative by certain of said devices, and a rock shaft-connected. with said universal bar, said pairv of pawls being actuated by said rock l shaft.

3.111 atypewriting machine, the combi` Lnation'of a ribbon vibrator, .printing key levers, and connections between said printing keyileifers and said vibrator comprising a universal bar formed with a series of 'vibrator comprising a universal bar formed with a series-offlexible contacts engageable by saidkey. levers and provided with a strip of strengthening material, the tongues alone transmitting movement from said key levers to said-universal bar.

5, In a typewriting machine, the combiinname formed with individual flexible tongues, and

astrip of strengthening material. secured Within said universal bar.

6. In a typewriting machine, the combi@ nation of a ribbon vibrator, a link connected thereto, Va rock shaft operative on said link,

a crank arin on said rock shaft, a key operated universal bai', and a link connected with said crank armand with said universal bar, said universal bar being provided with individual contact tongues and with a strip of strengthening material. In a typewriting machine, the coinbinationol a ribbon vibrator, a link connected I thereto,a rock shaft operative on said link, a crank arm on said rock shaft, a key `operated universal bar, and a second link connected with saidicrank arm .and with said universal bar, said universal bar being providedwith individual Contact tongues and with a strip of strengthening material, and

said second link ,being variablyv engageable ywith said crank arin.

8. In a typewriting machine, the combina tion of a ribbon vibrator, a link connected 3U thereto, a rock shaft operative on said link, a

crank arin on said rock shaft,aikey operated universal bar, anda second link connected with said crank arm and with said universal bar, said universal bar being U-shaped and a5 slitted `to provide individual contact tongues second link set invariable relationships with and carrying a strip 'of strengthening inaterial below ysaid tongues, said crank arni being provided with a depressed portion and said second linkbeing slotted to engage i0 slidably at varying points with'said crank arm including the depressed portion thereof.

9. In a typewriting'fmachine, Vthe combi- `nation of a ribbon vibrator, a link connect-- ed thereto` a rock shaft operative on` said link, a crank arm on said rockshatt, ha key 'operated universalvbar, and a second link connected with' saidunivcrsal bar and slotted to engage said `crankarin and co-'o'pciatc variably therewith. 1U. ln a 'typewiitiii ii'iachine. the coinbination ot a riblionvibra tor, al link connectyed thereto, a rock sliait oinerative on said link, `afvcrank arin on said rock shattprovided with a depression, a key 'operated unii versal bar, and a slotted link connected with said universal bar and co-opeiatingr variably with saidcrank alain-said slottodlink beine;

ineffective on said crankarm when oinpositc the depression therein.'

11. In atypewriting machine, thecoinbi- `nation of a ribbon vibrator, a link connected thereto, `a rockshaft.operativeon said link, a crank arin on said rock shaft, a keyy operswitch ,against movement.`

oversaid crank'arni, and ineans vfor main-- taining said slotted link set in variable relationships with said crank arm.` f

12. In a typewriting machine, the combination oia 'ribbon-vibrator, a link connected thereto, a rock shalt operative on said link, a-crank arin on said rockshaft, a key operated universalibanasecon'd link connected' with said universal bar ,and slotted to cooperate withsaid crank arm, and means tor maintaining said secondlink setl in variable relationships with said crank arin, said last recited ineens con'iprising a pivotc'd switch havingl a slot in' which said second link engages.y l f 13. In a typewriting` inachine,.the combination oft' aiibbon vibrator, a link connected thereto, al rock slia'ttvoperative on said link, a crank arm on vsaid'ro'ck shaft, a key loperateduniversal bar, second link connected with said universal bar and slotted to co-operate with said crank arm, means iior maintaining said second link set in variable relationships with said crank arm, said last recited means comprising a, pivoted'sivitch having a slot in which said second link engages, and a springdevice connected to ysaid switch. n v

14..'In a typewritinginachine,ftlie :combination et a ribbon vibrator, a lin'k'connectcd thereto,V a rock shaft `operative oli-said link, acrank arm on said rock shalt, a; second link slotted to `(zo-operate with said'crank arm, printing keys effective to actuate said second link,` and means for maintaining said` said `crank arm, said last recited `incans comprising a pivoted switchhaving,` a-slot in which said' second link engages, and a control handle pivoted on said` switch and nio-vableindependently thereof to 'lock Athe 15. In a typewriting machine, the coinbination ot a ribbon. vibrator, a link connecter thereto, Ia! rock i shaft operative on said link, 1 a crank arm on 'said rock shait, a .key operated universal bar, a second link connected with said universal bar andslotted to cooperate vvariably with said `crank arm. ,and Aincans t'or maintaining said second link set in variable relationships wi tlisaid crank askin. said last recited means comprising a pirated,

'spring-mounted switch having a slot in nation ot a ribbon vibrator, a linkconnected thereto, a rock shaittoperativezon said link, a crank arm on said `rock shaft, a second' link key actuated'an'd engageable variablywith said 4crank arm, switching member coiny'prising a U-Shptl body portion having an `upright lixedpivot and an arinproJecting ics Cil

tomatically for *rendering said members effective, sai'd'shift-ing means operating independently ofthe pull of the ribbon.

18. In a ribbon reversing mechanism for typewriting machines, the combination of ribbon spools,lashaft for driving said spools in alternation, and shaft shifting' means comprising key actuated members constant ly connected to said shaft but that'normally move ineffectively and devices controlledby the ribbon plies on said spools Ifor rendering said members effective, said shiftingmeans operating` independently of the pull ofthe ribbon. f

19. In a ribbon reversing` mechanism for typewritinp,` machines, `the conibination of ribbon carriers, a shaft for driving said carriers in alternation, and-shaft shifting means comprising,` pivot-ed members adapted to be swung on their pivots at each-actuation of the printing keys and constantly connected lto ksaid shaft, the `pivotal movements of lsaid members beingnormally ineffective and ribron-controlled devices operating automatically to render members effective,said shifting' means operating independently ofthe pull of the ribbon.

20. In a ribbon reversinglmechanism for typewriting machines, the combination of ribbon spools,a shaft for driving said spools in alternation, and shaft-shifting means comprising pivoted members kadapted to be swung on their pivots at each actuation of the printing keys-and constantly connected to said shaft, the pivotal'movements of said members being normally ineffective, and devices connected With said ribbon spools and controlledby the ribbon Wound thereon for automatically rendering saidmembers eifecf tive to shift said shaft, said devices operatin@ indcpendentlyof the pull of the ribbon.

21. In a ribbon reversing mechanism for typewriting machines, the combination of ribbon spools, a shiftable shaft operative to drivesaid spools in alternation, and shaft shifting means comprisingV key actuated bell cranks that-'are constantly connected to said shaft but normally move `ineffectively and reversing rods connected with said spools and controlled by the ribbon Wound thereon, said rods when released cooperating,l With said bell cranks to render them effective.

2Q. In a ribbon reversing,r mec-hanism for typeWrit-ing machines, the combination of ribbon carriers, a shiftable shaft operative to drive said carriers in alternation, vand shaft shifting means comprising key actuated bellcranks that normally move ineffectively, reversing rods connected with said carriers and controlled by the ribbon Wound thereon, and pivoted members connected with said shaft and on vwhich said bell cranks inturn are pivoted,'said rods when released cooperating with said bell cranks` to render them effective to `move said pivoted members and shift said shaft.

In a t i,'fpeivriting machine, the combination of 4ribbon spools, shaftstherefor, a ribbon driving shaft shiftablc to connect with said spoolL shafts, andmeans `for shifting; said driving-shaft automatically back and forth'to connect with said spool shafts, said means comprising rods housed in said spool shafts and controlled Aby the ribbon wound on said spools, pivoted members connected with said driving shaft, and bell cranks pivoted'on said members and cooperative with saidvrods to move' said members with the-other arms of saidbellcranks, an-

other pair of bell cranks connected with said links, crank arms operative on said other pair of bell cranks, anda key controlledrock shafton -ivhich'said crank arms are secured.

25. In' a front strike typewritingmachine, the combination of ribbon carriers, -vertical shaft-s onwhich said carriers are supported, beveled gears on said shafts, airibbon driving shaft, pinionsthereon engageable with said gears, and means forvmoving said driving shaft automatically back and forth to'connect it Ialternatively `with said gears, said meanscomprising pivoted members, bell cranks pivoted on said members, abntments controlled by the ribbon cooperative With `arms of said bell cranks, and driving means connected with the other arms of said bell cranks.

26. In` afront strike typeivritingmachine, the combination of ribbon carriers,vertical shafts on which said carriers are supported, beveled gears on said shafts, aribbon driving shaft, pinions thereon engag-eable with said gears, and means for moving said drivingshaft automatically back andfortlrrto connect it alternatively with said gears, said means comprising pivoted members, bell cranks pivoted on said members, key con* trolled means normally effective to move said bell cranks idly, and obstructions controlled by the ribbon eliective to cause said bell` cranks to actuate said pivoted members.

27. ln a front strike typewriting machine, the combination of a platen; a vibratory ribbon holder comprising a slotted portion through which the ribbon is threaded` and also a laterally extending arm terminating in an upward extension; a relatively stationary pivot lo which said extension is pivoted; a link pivoted to said holder at the elbow formed by its arm and extension; and key actuated means for moving said link in the direction of its length.

28. ln a iront strike typewriting machine, the combination ot a platen; a vibratory ribbon holder comprising a slotted portion through which the ribbon is threaded and an arm extending laterally and terminating in an upward extension; a relatively stationary pivot for said extension.; a link pivoted to said holder at the elbow formed by its arm and extension; an upwardly extending crank arm to which the opposite end of said link is pivoted, a key actuated rock shaft to which saidcrank arm is secured, and a draw spring connecting said crank arm with said holder.

29. In a typewriting machine, the combination of a ribbon vibrator, a rock shaft connected thereto, a crank arm on said rock shaft, a key operated link variably engageable with said crank arm, and a switch for setting said link in varying normal. relationships with said crank arm, said crank armV being adapted to contact with said switch in one of its positions to limit lthe throw of the vibrator.

30. In a typewriting machine, the combi'- nation of a ribbon vibrator, a rock shaft connected thereto, a crank arm on said rock shaft, a key operated link variably engageable with said crank arm, a switch for setting said link in varying normal relationships with said crank arm, said crank arm being adapted to contact with said switch in one of its positions to limit the throw of the vibrator, and a stationary stop engageable by said vibrator also to limit its throw, the stationary stop being effective when the switch is ineffective as a stop.

3l. In a ytypewriting machine, the combination of a ribbon vibrator, a rock shaft connected thereto, a crank arm on said rock shaft, a key operated link variably engageable with said crank arm, and a switch tor,

.stationary stop beinggreater than the `eX- tent of throw limited by the switch.

32. Ina typewritingmachine, the com` bination otfa ribbon vibrator, a krock shaft connected thereto, a crank arm on said rock shaft, a key operated link variably engageable with said crank arm, and switch means for saidv link, said means being also effective as va stop to limit the vibratory movement of the ribbon.

33. In ai typewriting machine, the combination of a set of levers, and a noisereducing universal bar operative thereby said universal bar having, a flange slitted transversely to provide liexible spring tongues engageable by said levers, said spring tongues alone transmitting movement from said levers to said universal bar.

34. Ina typewriting machine, the combination of a set of pivoted leversa `universal bar underlying said levers and operative thereby, said bar being made of thin metal and being U-shaped or channeldike in cross section, one of the `flanges of vsaid bar being slitted transversely to provide a. `series of Contact tongues engageable by said levers, the tongues being flexible or yielding, enabling the levers to ride over the top of the universal bar and depress it, whereby the operation is rendered substantially noiseless.

35. In a typewriting machine, the combination of a set of levers, and a noise-reducu ing universal bar operative thereby, said universal bar having a part. slitted transversely to provide flexible springv tongues, the tongues being inclined so that the levers will first strike the free ends of the tongues, said spring tongues alone transmitting movement from said levers to -said universal bar.

ySigned at Middletown, in the county` of Middlesex, and State of Connecticut, this 26th day of September, A.` D. 1925.

GEGRGE G. GOING.

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