US933181A - Ribbon mechanism for type-writing machines. - Google Patents

Ribbon mechanism for type-writing machines. Download PDF

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US933181A
US933181A US33321606A US1906333216A US933181A US 933181 A US933181 A US 933181A US 33321606 A US33321606 A US 33321606A US 1906333216 A US1906333216 A US 1906333216A US 933181 A US933181 A US 933181A
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Prior art keywords
ribbon
bar
levers
spools
feed
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US33321606A
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Oscar C Kavle
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EMMIT G LATTA
HARVEY A MOYER
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EMMIT G LATTA
HARVEY A MOYER
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • 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

Description

. i' o. G. KAVLE. RIBBON MBGHANISM FOR TYPE WRITING MACHINES.
APPLIOAT ION FILED SEPT. 4| 1906.
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O. C. KAVLE. RIBBON MBCHANISM POR TYP WRITING MACHINES.
APPLICATION FILED SEPT. 4, 1906.
Patentd Sept. 7, .1909.
o. G. KAVLE. RIBBON MEOIIANISM FCR TYPE WRITING MACHINES.-
APPLIOATION EIIJED SBPT.4,1906. y
. Patented Sept. 7, 1909.
4 SHEETS-SHEET 3.
.L l A l A 1 I.
2. o@ Ma@ l n o. c. KAVLB. 'RIBBON MEGHANISM FOR TYPE' WRITING MACHINES. APPLICATION FILED SEPT. 4. 1906.
, Pamente'l Sept. 7, 1909;
4 SHEETS-SHIJT 4.
In veafw UNITED sTATEs PATENT oEEicE.
OSCAR C. KAVLE, F SYRACUSE, NEW YORK, ASSIGNOR TO HARVEY A EMMIT G', LATTA., 0F SYRACUSE, NEW YORK. l"
Specification of Letters Patent.
Application ined september 4, ieoc. seriaiNo. 333,216.
State of New York, have invented a new and useful Improvement in Ribbon, Mechanisms for Type-Writing yMachines, of which the following is a specification.
This invention relates more particularly to ribbon operatin mechanisms for type.-
writing machines o the visible writing` kind in which the ribbon is vibrated to and from the printing position opposite to or over the printing point on the platen so, that the writing is exposed to View except when the ribbon is in the printing position, which ordinarily is only momentarily while the` type-bars are in motion.
The primary object of the invention is to produceadesirable and eflicient mechanism for both feeding and vibrating the ribbon,
which will be of' comparatively simple, du-
rable and inexpensive construction. T
Other objects of the invention may be stated as follows to provide two ink ribbons and vibrating mechanism therefor whereby leither ribbon can be used or both rendered inactive the simpleinovement of a' controlling switch or part; to
provide a' simple 'power-driven mechanism for feeding the ribbon lengthwise which will be positive and certain in action, simple in construction and require but little power for its operation; to provide simple means for reversing the feed of' the ribbon in whichl successive like movements of the same' part will reverse the feed of the ribbon regardless of the direction of movement of the ribbon; to provide means to pre- 40 vent the tearing of the ribbon from the spools; and to adapt the ribbon vibrating y mechanism to machines in which the platen is shifted to print different case characters. Still another object of the invention is t improve ribbon-operating mechanisms for typewriting machines in the respects hereinl'after described and-set forth in the claims. lIn the mechanism formin the subject of this invention two ribbons o diferent characterv are employed, `'enabling the production of different sorts of writing, forinstance,
v they may be of different colors, or one may;
be a record and the other a copying ribbon.
I., 'Ehe tvvp ribbons are `arizanged face to face,
that is, one over or in front of the other, and are attached at their ends to a single pair of-spocls and simultaneously lwound from one spool onto the other in the usual manner of feeding a single ribbon. The ribbons, however, pass through separate vibrating guides, or vibrators, near the printing point and both of these vibrators can be rendered inactive to hold both ribbons out of operative position, so as to expose the printing point and enable the use of the niachine for stencil cutting, or either vibrator, at will, can be placed in action to vibrate whichever ribbon itis desired to use, While the other vibrator and ribbon remain inactive below or away from the printing point.
While the mechanism is hereinafter described and shown in the drawings as constructed for feeding and vibrating two ribbons, it is to be noted that either of the de- ,vices for feeding the ribbons or for vibrating the ribbons are equally adag'rted for operating a single ribbon.
In the accompanying dranf'ings, consisting of four sheets: Figure 1 is a fragmentary longitudinal sectional elevation of a front strike typewriting machine provided with riblninoperating mechanism embodying the invention. Fig. 2 is a plan View, partly in Morne i AND Patented Sept. 7, 1909.
section, line 2-2. Fig. 1, of the ribbon,
`feed mechanism, the operating ratchet wheels for the ribbon spools being partly broken away to disclose the underlying parts. Fig. 3 is a longitudinal se'ctional ele- 'vation of the ribbon feed mechanism in line '3--3, Fig. '2. Fig. 4 is a transverse sectional elevation thereof in line L -"l, Fig. Fig. 5
is a fragmentary section, on an enlarged scale, of the ribbon reversing means. Figs. 6, 7 and 8 arev cross sectional elevations thereof in lilies. 6 6, 7--7 and 8-.-8, re-
spectively, Fig. 5.I Fig. 9 is a detail sectional plan of the clutch for connecting the,
ribbon 'spool to its shaft. Fig. 10 is a front elevation, partly in section, in line 10--10, Fig. 1, of the ribbon vibrating mechanism.
Figs. 11 and 12 are 'front elevations of the.
two ribbon Vibrators detached. 13 is a fragmentary sectional elevation o' the vibrating mechanism, on an enlarged scale, in line it-13, Fig."10. Figs. 14, 1,5 and 16 are horizontal sectional plans thereof in lines 14-14, 15,-15` and 16-16, respectively, Fig. .13. Fig. 17 is 'a sectionalplan of ribbon vibrators and their cont-rollin switch-lever, showing the latter in a d1 erentposition from thatw-hich it occupies in Flg. 16.
Like letters of reference refer to'y like parts.
the carriage by means not shown, for .ca-usl ing the horizontaltravel thereof, -D .the
finger key levers for actuating the typebar's, one of which with its connections to the `key lever is shown by dottedjlines at E in Fig. 1..
These parts in'ay be of any usual or suitable construction, but. the top fplatea is preferably secured to themain rame in any suitable manner enabling itto be detached. with the parts carried-thereby.' Y'
The machine illustrated is of thatl kind in which the type-bars carry two -sets' of type, and the platen is norma ly in println relation to the lower case type and is shifte 'into printing relation to the upper case type,
and the carriage for this purpose travelsin guides f on a shift frame F which is pivoted at f tothe rear ortion of the to of the main frame to osci late vertically. he shift frame does-not partake in the horizontal' travel of the-carria e but is -simply capable of swinging up and down to shift the' lcarriage-and platen.' It can thus be raisedand lowered byany suitable means, such, for in',
as stance, as a pitman f2, Fig. 1, connecting'a slotted front extension f3 of the shift'frame with a lcrank disk f* whichis oscilla-ted by agear pinion' f5 thereon meshin toothed segment f secured to a roc shaft f 40' provided at opposite ends with rock arms 'actuated by rocking shift levers at opposite sides of the machine. One shift lever and one rock arm'are shown atj*l and f respectively,^Fig. 1. This mechanism for shifting the carriage is fully described in the ap- 'plication of G. Latta for typewriting machines, filed June 14, 1905, l\0. 265,217, and a further 'description thereof herein is unnecessary G G represent the two ink ribbons, which, as'before stated, are arranged face to face or one in front of the other, and are attached at opposite ends'to a pair of s ools H H which lare preferably arranged above the top plate aof the frame at opposite sides of thefront portion thereof` on upright shafts h' 71. journaled in suitable bearings h2 on the top plate. These spools are operated by feed mechanism to be hereinafter described, to wind the 'ribbons slmultaneously onto one spool -fromfthefoth'er'in the -sajne manner as if a single ribbon' connecting the spools were employed. The ribbons pass through stationarv guides z' of suitable construction,
y "655 one of which'is shown in Fig. 1, located adand means are provided either, vibrator independently of theother I jacent to the spools, and through separate. 'vibrating guides, or vibrators K K', Flgs.
l and 10-15, arranged vertically one in front" ofthe other adjacent to the printing point of the platen. These vibrators are arranged .to normally hold the ribbons `down below the printingpoint so as to expplserippiatplg to vibrate lwhichever ribbon it is desired to use to and from printing position between the printin point of the platen and the typebars. Eac
vibrator, see. Figs. 11 and 12, preferably consists of a piece of sheet metal having aat 'body portion with side wings 80 or parts at its upper. end bent .to form o en .guide loops 7c for the ribbon extending orwardly at an angle fromthe body portion .toward the ribbon spools and se arated by .anQintervening slot or opening w ich allows 85 lthe type to Vstrike the ribbon.
The guide loops of the rear vibrator are s laced farther a art Vthan those ofthe front yi rator so that 't e two vibrators can' be arranged close together, one infront of the other, as shown 1n Fig. 15, and one reci rocated without inL terference with the ot er. Each vibrator has at one` side a `depending legprovided at its lower end with a lateral pro'eotion' ory foot k. ,These feet project lateral y toward cach other but are separated by an intervening space, and thefleg of the front. vibrator is preferably bent rearwardly somewhat to place both feet in line opposite to each other,
4see Figs. 1,3, -16 and 17. The vibrators are 100 arranged to slide vertically '1n guide grooves or ways Z, Fig. 14, vin a suitable upright support or bracket Z, Figs. 1, 10 and 13-15 having rearwardly projectin arms secure 'by rivets'Z2 or. otherwise in t e slotted front`105 extension f3 of the shift frame.' The bracket Z and vibrators are llocatedin frontv of the Scale bar.` Z8 vof the carriage and are preferably provided with registering openings through which the scale bar can .be seen. The .opening ofl the. brackethas beveled edges, and a cross wire Z", Fig. 10, is preferably provided in the opening which contrasts in color with the ,scale bar and serves as a center index or printing point indif' 115 cator. The vibrators could 'beconstructe'd and mounted on the shift frame in any other suitable manner.-
' M, Figs.- 1, .10, 13,16 and 17, 'represents a lever pivoted in theslotted front extension f of the'shift frame a'nd havin fa horizontally projectin arm with aooked end which extends hetween the legs of the two. vibrators and bearson the two feet thereof.
A switch lever or sorin m is pivoted at its rear end in aslot 1n t e vibrator lever M and extends horizontally beneath the hooked arm thereof, having its free end bent to form a loop or handle by which it canbe swung either vibrator, 'or in a central yposition between the vibrator feet. The switch is narrower thanV the distance between the vibrator feet, and when placed vcentrally it will pass upwardly between the feet when the vibrator lever is oscillated without lifting either vibrator, whereas if it is shifted laterally' to one side beneath the foot of vibrators can be rendered inactive or either one .desired can be put in operation. Thel vibrator lever will hold both Vibrators down when at rest in its lower position, and will always draw down either vibrator which might be raised, but it will not lift either vibrator when the switch spring isvplaced centrally. The switch lever can lbe held from accidental movement by frictional contact with the vibrator lever, or in any other convenient manner.
The vibrator lever is operated in the machine illustrated by the following means, see Figs. l, 2 and 10: The lever has a depending arm connectedfby a link n to an arm u secured to and projecting upwardly from the. central portion of a horizontal rock shaft n2 journaled at its ends in suitable bearings in the sides of the frame A. The rock shaft has forwardly projecting rock arms n3, Fig. 2, near lits ends from which is pivotally suspended a universal bar N arranged horizontally below the key levers. The universal bar is engaged and depressed by each key lever that is moved to operate a type-bar, and oscillates the vibrator lever through the described Connections. Unless the vibrator switch is in a central position one of the vibrators will thus be raised and the ribbon carried thereby placed in position to be struck by the type-bar to make an impression whenevera type-bar is actuated, and the vibrator will again lower the ribbon to expose the writing when the key lever is released and the type-bar returned. A spring a* is connectedto the universal bar at any suitable point for restoringthe same and the' other parts of the vibrating lmechanism to the normal position. lThe universal bar N has no connection whatever with the carriage escapement and a separate and distinct universal bar N', Fig'jl, isemployed for operating the escapement which. is indicated at. X2. This second universal bar is prefer-l ably of that sort arranged near the type-bar segment to be operated' by the type-bars when near theliniit of their excursions to the platen. Actuators N8are shown in Fig,- 1 -zorti'ansmit-tingmotion from the type-bars to the universal bar N for rocking it to operate the escapenientl This escapement could, however, be varied without departing rack bar has-a depending fpart actuatingF mechanism thus briefly referred to and shown iii Fig. l forms netpart 'of thai present invention but is fully disclosed in my -prior application, Serial No. 320,541, filed June 7 1906. '.l`he=nniversal bar N for the vibrators is preferably located somewhat below the lower edges of the. key levers, as shown in Fig. 1, so that .the key levers can be depressed far enough to start the type-bar actions before the 'universal bar is engagedl and .moved to operate the vibrator. The type-bars are preferably operated with an accelerating motion, but. the ribbon vibrator has a uniform motion which enables the ribbon to reach the printing position at the proper time without danger of the vibrator slipping up on the ribbon, an'd the wear in the vibrating mechanism is lessened, andthe mechanism is preferably so timed that the carriage escapement is not operated until after .the ribbon reaches the printing position. As the vibrators. and their operating lever are mounted on the shift frame I" they are shifted with the platen and their relation to the platen remains the same, but the uni- `versal bar N and rock shaft u2 are supported 1 by the main frame.
Therefore` to insure ractically equal movements of the vibrators in both positions of the shift frame, the vibrating mechanism is .so proportioned and arranged that the link n' will occn y the full line position, shown in Fig. l, be ow a line passing through the pivot joining the link to the rock arm n and the pivotal axis of the shift-when the shift frame is in its lower position, and will cross said line to the position shown by broken lines in said Fig. l when the shift frame is raised.v By this ar-A rangement of the link a the movement-s thereof by the rock arm will be substantially similar in both positions of thelink and consequently substantially equal movements of the vibrators will be produced in both positions of the shift frame. This same vibrat-r ing mechanism could be used for operating a singlel vibrator 'for one ribbon. The arrangement and -construction of the two viin the manner described, whereby either of two ribbons can be used or bot-h allowed to lremain inactive out of the path of the type,
from the invention.
' The mechanismfor operating the ribbon spoolsto feed the ribbons lengthwise 'is preferably constructed as follows: O, Figs. 1,
3 and 4, represents a gear pinion which is 12e, sec'ured to the carriage-drivin sprin drum and meshes with atoothe rack which isjirlovablecrosswise-of the machine .in -a' guide slotl p in Ytheframe top plate a. The 'n lsprvided 12a with a socket :oropening' seate on .a ,reducedcylindrical party of a horizontal feed. bar-Q which is arranged below the to vplate a -and'v is reciproeated with' the. racz Jaar. ,The feed bar has acyliiidricalportion-at one .pending from the top plate a in W ich the' bar is adapted to sllde and. turn, and the shaped portionlnear its opposite end and twoop'posite ledges of each cross shaped .por-
tron are? smooth and the other two opposite edges have 'teeth g4 with inclined and abru t faces. fThe abrupt4 faces of the .20 saniedrection, but` the teethfat one end of teeth at'` oth-end'sflofthe `rod-face in the.
l' therodzxar disposed in a plane atright ari-L glee with. respect to' the teeth at the other end] of the rod.'V that is, theteeth atonefend" offv .the rod will'o extend. horizontally there# 'frein-while the Vteeth at;thefptheryend `the rod extend vertically. By'A tuul'fnlg. the' toothed edge at oneend of the rod'a'nd'tler'r;
rod will beplaced ld ovvnwaial,."vvhieh'is 'the operative. position. -Af'flat spring-"g5, Figs.V
5 and 6,' securfxl' at one ,endof'the' underside ofthe top plateand bearing at-its free end against a. rectangular part of `the-sleeveserves tofhold the 'sleeve an rod stationary .'butgallovvsl itto be yturned. by the applica-- tion of alittle force.
' RR. Figs. 1-3, represent 'two ribbonA feed levers fwhich are pivotedbeneath the top w platev dat opposite sides of the machine in. any suitable manner, preferably on shouldered screws rdepending from-.the to plate.' The rear ends ofthe levers extend enea'th and lare' h eld yieldinglyup by their resilience;agains t the cross-shaped parts at the i opposite endsl of the feed bar and have upwardly directed teeth. oredges-1" for en- ,5d gager'nent with the teeth on the feedrbar.`
The other ends of the levers are provided with toothed segments# r3 meshing with.l toothed segments on pawl levers- S S jouw.. naled to oscillate on the lower lends of the. spool shafts h L respectively. The. pavv'lv levers have, pawls 8 pi'voted thereto which coperate withratchet wheels s secured to the' spool shafts to turnthe spools. The
y free ends of the pawls are pressed toward the ratchet wheels, for instance, by springs s2 connecting the pawls to the pawl levers. and
the heels of the" pawls are adapted to strike fixed stops,A such as pins s3 depending from the top plate a, to limit the returnlnovenients of the pawl levers and swing the f ree ends of the pawls out of engagement With the teeth of the ratchet wheels. The pawl levers are oppositely arranged and the segment r2 of one of the feed.levers R extends infront of its spool shaft and is internally toothed while the'othersegment is located in rear .of its spool shaft and is externally toothed, whereby the'movements of the rear ends of the feed' levers in the same direction will turn the spools in opposite directions. Suitable returns rings s4 are provided for moving the feed evers in the directionopposite. to that in which they are moved by the-feed bar. y
The' lfeed .bar is reciprocated with the platen carrie e by the toothed rack and -`pinion, and w en it is in the position shown 1n Figs. 2 and 4 one of tlre toothed edges at its left-hand end will be in engagement with'the left-hand feed lever which will reciprocate with the `feed bar so that the ratchet and pawl actuated thereby will slowly l turn-the lleft-hand spool upon each travel of the carriage to the left in writing a line, and the' pawl will ride backwardly over the ratchet 4Wheel to ,take a new hold each time the carria eis set back. the other. eed lever It", however, will bear f against one of the smoothedges at the rightvhandl end of'the feed bar and will not be reciprocated thereby but will'be held by its springt s4 in the positionshown-in. Fig. 2, .with lts pawl against the back-stop s and Thel rear end of 'out -of engagement with the ratchet wheel l for the rightehand spool so as not to inter- -fere with .the backward rotation of this spool. The ribbonswill thus be wound onto *the left-'hand spool from the other one, or fed one direction as long as .the feed bar Q remains in the position shown. Vhen it is desired to reverse the feed of the ribbons, .the fed'bar is turned onequarter of a revolution, which turns oneof the .toothed edges at its right-hand end' down into enga ement "wit'hthe right-hand feed lever R w ereby thislever will be bron ht intoaction While the other'feed lever wi l bear against one of the smooth edges at the left-hand end of the feed rod and will be retracted by its spring .s4 to .the position shown in Fig. 2, with the pawlactuated'thereby against its stop and out of engagementwith its ratchet wheel. W hen the feediba'r is now reciprecated with the carriage theleft-hand feed lever will remain' inactive and the ribbon will be fed in the'opposite direction by theright-hand feed lever. One feed lever is thus always inactive with the pawl. actuated thereb against its stop and out ofengagement witi v .its ratchet` wheel so as notl to interfere with theunwinding of the ribbons from the spool operated tliereby,.blit thelever which is in operation 'will only assume this position .when the carriage isfset back to the full limit of its travel, which willnot-occ'ur when the lefthand marginI stopgisset for paragraphing or for producing the usual margin at the left-hand edge of the sheet, and the pawl which is in action will ordinarily, therefore, be in operative engagement .with its ratchet wheel ready to t-urn the spoolr upon any movement of the carriage to the left. By providing a number of teeth on each toothed edge of the feed bar, the latter can be turned in any position of the carriage and one feed lo lever will always be engaged by one of the teeth on the bar. If the ribbon is-reversed when the carriage is at the left, the feed lever which is thrown 'intoaction w-ill simply overrun the teetli of the feed bar when the' carriage is set back to the right, and if the feed bar is turned in an intermediate position of the carriage one feed lever will intercept the nearest ytooth on the feed bar and will be driven thereby until the carriage is 2o set back,'when the lever will overrun the teeth 'and assume the proper position for the next line. 4 I
A friction washer T of any suit-able kind preferably surrounds each spool shaft be tween its bearing and the ratchet wheel to` prevent the spools from turning too freelyis simple, and occupies but little space under the top plate of the frame by which it is protected from dirt and injury, and it can be readily assembled on the removable top plate or removed therewith from the machine for repairing,` It eliminates the usual expensive train of bevel gearing. The feed mechanism could be used for a single ribbon without change except that smaller spools could be employed. This same mechanism could also be used in connection with vibrating means different from those described'. Different means could also be used for transmitting the movements offeed levers ,actuated by a reciprocating feed rod in the manner described to' the ribbon spools, and the construction'-offthe feed bar and Ivman'nerof mounting the same and the ,means for reciprocating the 'bar could also differ w'ithout departing from theinventi'on, ,l
following means: U, l1`ig."`1 a push rod arranged horizon y,y ot' tl'iemachinc to slidef'in suitable; `bca'ri1'1g-s on they frame A andliavingfa p `tension adapted to engage aratchet'wh'eel u.
having four teeth formed onffor securedto th( bearing sleeve q2l for theffeed bar.. The
` 1 A slhbutton fu atl its front end byfwhichht` caiifbe pushed? Y: s rearwardly. The rodfhas a.""fl',e'x1ble` rear ex-V lreturned tov this position after actuation by a suitable spring u2, Figs. 1-3, secured to the front of the frame A and bearing against the rear end of the push button. Each time the push rod is pushed rearwardly its rear end will engage the ratchet wheel u and turn the bearing sleeve g2 and feed bar one quarter of a revolution, and by reason of the described construction and arrangement of the feed bar and feed levers a different lever will be thrown into action and the ribbon fed ina different direction each time the push rod is pushed rearwardly. The ribbon is therefore reversed, no matter which way it has been feeding, by-a rearward or like movement of the push rod and the operator does not have to ascertain the direction of movement of the ribbons, or the position of any of the parts to reverse the feed. Any other suitable device for turning the feed bar to reverse 'the feed could be employed.
n In order to prevent the tearing of the ribbons from the spools, each spool is preferably releasably coupled to its shaft so that the shaft can turn independently of the spool in case that the operation of the machine and feed mechanism is continued after the ribbon. is completely unwound from the spool. The coupling shown, see Figs. 1-8-9, consists of a collar V having Hat sides surrounding and adapted to turnl on an enlargement o on the spool shaft, also having ldat sides, and la U-shaped Spring o which embraces the collar and bears against the flat faces ofthe enlargement. The collar has a. pin v2 which enters a hole in the spool to turn the spool. The spring e will cause the collar and spool to turn with the shaft unless an undue strain is placed upon the ribbon and spool,when the springwill yield and allow the shaft to turn in the collar without turning the latter' and the spool.
I claim as my invention:
l.' In a typewriting machine, the combination of a universal bar controlling the carriage escapement, and a ribbon vibrating 'mechanism independent of said universal bar andl constructed to move the ribbon to `the printing position with a substantially l uniform inotion in advance of the operation of said universal'bar, substantially as set y l, forth.
The feed barV is turned,`as"explaine'd, for 55 reversing the ribbon feed p r terab'l-y,l by. the.
2.v In a typewriting machine, the combination of a universal bar controlling the carriage escapement, land ribbon vibrating' mechanism includinga second universal bar which is actuated to place the ribbon in printing position in advance of the actuation of llaid universe lbar for ,the carriage escapement,substantially as set' forth.
3. In a typewriting machine, the combination of type-bars, key levers therefor, a carriage escapemcnt, a universal bar for the carriage escapement actuated by the' imment and 4is actuated by the key levers. for vibrating the ribbon with a substantially uniform movement, 'substantially as set forth. 4. In'a typewritin machine, the combination of a pivoted sli'i t frame supporting the i platen, aribbon vibrator supported by said shift frame and movable therewith to main-A tain substantially the same relation to the platen in different positions ofthe shift frame, an `actuating rock arn'i for the vibrator having a fixed pivotal support, a link connected' at one end to said rock arm, and
'a lever pivoted on thes'hift frame and connected to the other end of said .link and to the vibrator5'said link being movable when the shift frame is' oscillated across a line passing through the pivotal axis of the shiftframe and the joint connecting said link and rock arin whereby substantially like move nients of the vibrator are produced in different positions of the shift frame, substantially as set forth. In a typewritingl machine, the combination of a platen which is` shifted for printing different case characters, `an upright front of the other and having opposite spaced bracket-which is -shifted with the platen,l a'
ribbon vibrator slidably supported on-said 'bracket, and means for slidingthe vibrator substantially equal distances on the bracket in diti'erentpositions thereof, substantially as set forth.
6. In a typewriting machine, .the combination of a movable shift frame supporting the platen, a ribbon vibrator supported by said shift frame and movable therewith to. maintain substantially .the same relation to the platen in Adierent positions of the shift frame, said vibrator beingmovable vertically .toward and from printing position, a lever pivoted to said shift frame and connected to said lever, substantially as set forth.
7 In a typewriting mach-ine, the combination of a shift framey pivoted at its rear'to oscillate vertically', a platen supporting car-- riage which travels laterally on'said shift frame, a rigid bracket at the front central porti-on of said 'shift franie, a ribbon vibrator movableon said bracket, a lever. pivoted on said shift frame and connectedv to the Vibra- 'uide v for each ribbon, a common actuating.
evice for said guides, means for causing said actuatingdev-ice to vibrate any one of said guides separately towai'd and from the printing position, and means independent of said actuatin device for niovably supporting said gui es,`snbtantial1y as set forth.
933,1 sr t 9. In a typewriting machine, the combina- Vibrators forsaid ribbons, and means for actuating one of said vibrators which normally holds both ribbons out of printing position, substantially as set forth.
10. 'In a typewriting machine, 'the combination of two ribbons arranged one in front of the other adjacentto the printing point, independently movable vibrators for the ribbons, means forniovably supportinff said vibrators and retaining themvertica and a-n operating device independent of said supportingl means -which is separately connectible to said vibrators, substantially as set forth.
11. In a `typewriting machine, the combination of a attached to said spools, and two ribbon vibrators arranged one in front ofthe other and having guide Wines vdirected toward space 'farther apart than those of the other vibrator, substantially as set forth.
. 12. In a `typewriting machine, the combination of two ribbons, ltwo vibrators for said ribbons arranged to. reciprocate onein projections, a lever bearing on said projections to movesaid vibrators in one direction, and a part on said lever movable to a position .between said projections o1' opposite to either projection for moving one of said vibratorsin the opposite direction, substantially as set forth. l
13. In a typewriting machine, the combination with a carriage and driving means said driving means, ribbon spools, pivoted levers operatively connected to said spools for transmitting motion. thereto from said reciprocating bar. and means for operatively connecting one of said levers to said reciproeating bar, substantially as set forth.
14; In a typewriting machine, the com bination with a carriage and driving means therefor, of a bar which is reciprocated by said diiviiigmeans, ribbon spools, pivoted levers operatively connected to said reciprocating bar, and ratchet and pawl mechanism between said levers and spools, substantially as set forth.
15. In a typewriting machine, the combination 4tvith a carriage and driving means therefor, of a gear wheel driven by said earriage driving means, a rack bar reeiprocated by said gear wheel, ribbon spools, and pivoted leversoperatively connected to said spools for transmitting motion thereto from 'said rack bar, and means for operatively connecting one of said levers to said rack bar, substantially as set forth.
nation with a carriage and driving means therefor, of a bar which is reeiprwaied by tion of two ribbons, independently movable air of spools, two ribbons' said s ools, the wings ofP one vibrator being l 16. ln a typewriting machine., the eonibiy therefor, of a bar which is reciproeated by l casa-si said driving means, ribbon spools, pivotedl levers operatively connected to said spools for. transmitting motion thereto vfrom said j levers opera-tively connected to said spools to rotate said spools in opposite directions by' movements of the levers in the same. directions, and means'for operatively connecting one of said levers to said reciprocating j bar, substantially as set forth.
18. In a typewriting machine, the `combination with a carriage and driving means therefor, of a bar which is reciprocated by said driving means, ribbon spools, pivoted levers operatively connected to said spools to rotate-said Ispools in opposite directions by movements of the levers in the same direction, and means for operatively connecting said levers separately to said reciprocating bar whereby like movements of the bar Will produce opposite. notations of said spools, substantially asset forth.
19. In a typewriting machine, the combination of ribbon spools, pivoted levers operatively connected to saidspools for rotating the same, an adjustable reciprocating bar constructed to operatively engage one of said levers in one position of the bar to drive one spool and in another positionl of the bar to operatively envage the other lever to drivey the other spoof substantially as set forth.
20. In a. ty eWrit-ing machine,the combination of rib on spools, pivoted levers operatively .connected to said spools for rotating the same, an adjustable reciprocatingl baradapted 'in one position thereof to'operatively en age one of saidlevers to drive one spool andr release the other lever and spool, and in another vpositionv to release the first lever and spool vand operatively engage the other lever to drive the other spool, substantially as set forth.
21. In a typewriting machine, the combination with a carriage and driving means ,A therefor, of ribbonspools, a bar which is reciprocated by said driving means, centrally pivoted. levers each operativelyconnected at one end to one of said spools for transmitting motion thereto from said bar, and means foi operatively connecting the opposite end of one of said levers to and disconnecting the opposite end of the other lever from said bar,substantially as set forth.
22. In a ty ew'riting machine,the combination of riblbon spools, centrally pivoted feed levers one having an externally vand the other an internally toothed segment, pawl levers connected to said spools and having gear segments meshing with the toothed segments of said feed levers, a i'eciprmratiug bar, and means for operatively connecting saidfeed levers alternately to said bar. substantially as set forth.
23. In a typewriting machine, the combination of ribbon spools, pivoted levers operatively connected to'said spools, arecipioeating bar having teeth for engagement with said levers, and means for engaging one le ver with the teeth onI said bar and disengaging the other lever from said teeth, 'substantially as set forth.'
24. In a typewriting machine, the combination of ribbon spools, pivotevd levers opleratively connected to said spools.v a recipro-` cating rotatably adjustable bar provided With means for engagement with said levers, means for turning said bar to different positions for engagement first with oneof said levers and then With the other, and means f for releasably holding said bar in different' positions, substantially set forth.
25. In a typewriting machine, the combinationivith a carriage, and driving means therefor, of ribbon spools, pivoted levers operatively connected to saidspools, a bar rcciprocated by said carriage driving means,
a rotatable feed bar connected to said recip-` rocatin bar and having teeth and'smooth edges or engagement With said levers, the teeth being arranged to engage one lever in one position of the bar and the other lever in the other position of the bar. and means for rotatably ad'usting said feed bar, substantially as set orth.
26. In a typeWr'iting machine, the combination of ribbon feeding means, and reversing means therefor, including a push-rod which is moved in the same direction1 to reverse the ribbon feed regardless of the direction of movement of the ribbon, substantially as set forth.
27. In a typevvriting machine, the combination of ribbon feeding means, and reversing means therefor including a push-rod which has an endwise movement only and reverses the ribbon feed upon successive movements thereof in the same direction regardless of the direction of movement. of the ribbon, substantially as set forth.
' 28. In a typewriting machine, tihe combination of ribbon spools, a feed rod and connections for rotating said spools, said rod being rotatably adjustable for reversing the movement of the ribbon feed, and a pushrod for turning said feed rod, substantially asset forth. j A 29. In a typetvriting machine. the combination of a main frame which supports the type-bar action and is provided with a reyvholly by said top plate and is removable therewith froml the main frame, substan# tiallvs set forth.
3b..'lhe eombinationof a ribbon, ribbon,` spools, means for'pdriving the same, and connections between the spools and`dr1ving.
means for releasing the spools therefrom under abnormal strain on the ribbon to -prevent tearing the ribbon, substantially as s et forth.
3l. The cOmbiDatiOn 'of' a a' spool shaft, a collar journaled on'sa-id'shaft and connected to said spool, a spring which lis connected to aid ,collar and bears against a Hat face on s id shaft to cause the 4collar to turn with saidllshaft except -when subject to abnormal strain, substantially asset forth.
32. In 'aA typewritingmachine, the vcombilnation of ribbon spools located at.the front l .portion of the machine, horizontally swinging levers arranged at opposite sides of the machine, operative connections between said levers and said -spools, and means at the rear portion of the machine for operating said vlevers to drive one or the other of said spools,
. substantially as set forth.
33. In a typewriting machine, the coi'nbi- I nation of ribbon spools located at the front portion of the machine, levers at opposite.
sides ofthe upper portion of the machine which extend rearwardly from said spools,
foperativ'e connections between said levers 'and said spools, and power-actuated means .frontportionof the machine, horizonta ly Swingin levers arranged at opposite sides of the mac ine beneath the top plate thereof, operative connections between said levers and said spools,'and means at the rear p0rtion of the machine actuated by said car- '-r iagedriving means for operating said le- 'vers todrive one or the other of snld spools,
substantially as set forth.
Witness my gust, 1906.
. OSCAR e. Kaviar..
Witnesses CHESTER W. REID, OTTO A. SCINLLY.
hand, this th day oli Au-
US33321606A 1906-09-04 1906-09-04 Ribbon mechanism for type-writing machines. Expired - Lifetime US933181A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917996A (en) * 1955-04-25 1959-12-22 Burroughs Corp Thermal printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917996A (en) * 1955-04-25 1959-12-22 Burroughs Corp Thermal printer

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