US1102752A - Type-writing machine. - Google Patents

Description

H. W. HIGHAM & P. RI$LEY.

TYPE WRITING MACHINE.

APPLIGATION FILED MAR. 24, 1914.

1,102,752 Patented July 7, 1914 3 SHEETS-SHEET 1.

THEIRATTURNEY H. W. HIGHAM & P. RISLBY.

TYPE WRITING MACHINE. AIY'PLIOATION FILED MAR. 24; 1914.

1,102,752. Patented July,7,1914. I

3 SHEETS-SHEET 2;

WI'TNESEEEQ J? INVENTEIRS: WMJAMM FLZWQW THLIBLALTEIBNLY I H. W. HIGHAM & P. RISLEY.

TYPE WRITING MACHINE.

AIPLIOATION FILED MAR. 24, 1914.

1,102,752. Patented July 7, 1914,

3 SHEETS-SHEET 3.

WITNEESES.

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THEIR ATTIJENEY UNITED STATES rngnnr OFFICE.

HARRY WILLIAM RIG-HAM, OF SANDERSTEAD, AND PHILEMON RISLEY. OF GU'NNERS- BURY, ENGLAND, ASSIGNORS TO REMINGTON TYPEWRITER COMP ANY, OF ILION,

NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING- MACHINE.

Specification of Letters Patent.

Patented July '7, 1914.

Application filed March 24, 1914. Serial No. 826,847.

To all whom it may concern Be it known that We, HARRY WILLIAM HIGHAM and PHILEMON RIsnnY, subjects of the King of Great Britain and Ireland, residents, respectively, of Glen Lyn, Sanderstead Hill, Sanderstead, inthe county of Surrey, and 56 Silver Crescent, Gunnersbury, in the county of Middlesex, England, have invented certain new and useful Improvements in Type-\Vriting Machines, of which the following is a specification.

Our present invention relates to means for duplicating typewritten work and its general object is to provide'improved means of the character specified and especially means for producing a duplicate copy, preferably an inked copy, in addition to the usual inked or first copy, which means may be readily thrown into and out of use wlthout disturbing the work sheets on which the writing is bemg done.

-More specifically stated one -ob ect of the invention is to provide improved ribbon mechanism that is mounted on the traveling carriage of the machine and preferably supplements the usual vibratoryribbon mechanism that is mounted on the frame.

Another object is to provide improved paper guiding devices which are separately adapted to facilitate the interleaving of work sheets with ribbon plies,

Another object is to provide improved paper severing devices.

To the above and other ends our invention consists in the features of construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

One form of our present invention is illustrated in the accompanying drawings wherein- Figural is a fragmentary front elevation of the upper part of a Remington No. 10

front-strike typewriting machine embody ing our invention. Fig. 1 is'a detail horizontal sectional view of parts associated with the right-hand end portion of the ribbon driving shaft. Fig. 2 is a vertical sectional view taken on a plane indicated by the dotted line w-w in Fig. 1 and looking in the direction of the arrows at said line.

Fig. 3 is a fragmentary end elevation partly in section illustrating more particularly the mechanism for shifting bodily the carriage carried ribbon spools whereby the ribbon is shifted into and out of use. Fig. 4 is a fragmentary vertical sectional view taken on a plane indicated by the dotted line yy in Fig. 1 and illustrating the ribbon guiding devices, some parts that appear in Fig. 2 being omitted. Fig. 5 is a fragmentary side elevation of the upper part of the machine embodying our invention, some parts being in section. Fig. 6 is a fragmentary vertical transverse sectional view taken near the right-hand end of the platen and looking toward the right, theview illustrating the feeding devices for the carriage carried ribbon. Fig. 7 is a diagrammatic view on a reduced scale showing the platen and the paper feeding or pressure rollers in relationship to the work sheets.

Referring first more especially to Figs. 1 and 2 the main frame of the machine comprises a top plate 1 from which rise standards or lugs 2 whereto are fixed grooved gued rails 3 and 4, the same cooperating respectively through anti-friction balls 5 with the grooved front bar 6 and rear bar 7 of a carriage truck which further comprises connecting end bars 8. Shiftably connected with said truck through devices 9 is a platen frame comprising end plates or bars 10 and devices comprising a pivotally mounted arm.

17 coaxial with the platen and pivotally supporting at 18 a pawl 19 which is adapted to engage with the ratchet wheel. A forwardly extending link 20. ivotally connects said pawl with the, upwar y and forwardly inclined arm 21 of a bell crank which further includes a short rearwardly extending arm 22, the bell crank being pivoted at 23 on the right-hand end bar 8. Another link 24 connects the arm 22 with a .crank arm 25 fixed to. the rearend of a rock shaft'26 which bears in a journal box 27 fixed to said end bar 8, said journal box housing a coiled restoring sprin gnot shown). Integral with. the rock 5 a t and bent downward from the forward end thereof is a hand piece or handle 28 by which the line spacing devices are operated. Supplement ing the usual ribbon 29 which is controlled by a vibrator 30 of the regular Remington construction is a ribbon 31 which extends longitudinally of the platen behind the regu-,

like portion 33 on which the associate ribbon spool is supported. From the forward side of each shelf an ear is bent upward and then rearward forming a bearing portion 33 parallel with and above the shelf, the bearing portion and the shelf providing bearings for the shaft 34 of the ribbon spool 32. From the top of the body portion of each bracket an ear 33 projects rearward inside the associate end plate 10 and has suitably fixed to it a bearing block or slide 35 which extends laterally outward through and bears slidably in a vertical slot 36 formed in an upright extension 10' at the forward side of the end plate 10 andintegral therewith: The bearing block is provided with a head 35 which engages the outer face of the upright extension 10 and prevents accidental displacement of the bracket 33. Each bracket or support is thus slidably mounted on the platen frame and is adapted to be moved up and down vertically to an extent limited by the length of the slots 36. When down in normal position with the bearing blocks 35 resting on the bottoms of the slots 36 the unwound portion of the ribbon 31 that extends between the spools 32 is opposite to and covers the printing line at the front face of the platen and which passes through the printing point, said printing point being indicated by 11.. When, however, the supports 33 are raised by means hereinafter described to the Fig. 5 position, the supplementary ribbon 31 is withdrawn from use, being lifted above and out of register with the printing line. In order that the ribbon 31 may be guided close to the platen substantially throughout its length, upright roller guides 32 are mounted on the shelf portions 33 behind the ribbon spools and close to the platen, the ribbon after leaving the spools passlng over and-around said guides before being led inward over the platen.

The feeding means for feeding the supplementary ribbon 31 lengthwise from one spool to the other comprise, as shown in Figs. 1 and 2, beveled pinions 37, one fixed to each shaft 34 at its upper end which projects through and terminates above the associate bearing ear 33". Said pinions are adapted to mesh alternately with beveled driving pinions 38 secured to a driving or power. shaft 39 that extends lengthwise of the platen and asses outward through openings in the brac (ets'33. At the left .the shaft bears in an upright arm 40 screwed to the left-hand bracket 33 and at the right in a flanged sleeve 41 (Fig. 1*) screwed to the outer face of the right-hand bracket 33. The construction is such that the shaft 39 serves both to drive the ribbon erally extending pawl tooth 45 which engages the ratchet teeth. Said pawl is pivoted at 46 to an arm 47 which, as clearly appears in Fig. 1, is pivoted on the sleeve 41 and is confined loosely between the flange thereof and the inner face of the right-hand bracket 33. The pawl 44 has a limited pivotalmovement on the supporting arm 47 by reason of theengagement between a lateral pin 48 on said arm and a'hole 49 in said pawl. The forward end of the arm 47 is enlarged or broadened and rounded as indicated at 47 and is adapted to be engaged by the rear edge of the bell crank arm 21 on an arm' 42 during line spacing operations both in lower case and upper case positions. Thisedge is inclined forward and operates as a cam on the arm 47, lifting or swinging said arm upward from the normal or Fig. 2 position to the Fig. 6 position. During this swing of the arm the pawl tooth 45 coiiperating with the ratchet 43 turns it and the ribbon drivone of the drive pinions 38 (the right-hand one in Fi 1) which is operative at the time to turn t e associate pinion 37 and ribbon spool 32 to wind the ribbon thereon, thus communicating a slight feeding movement to theribbon which moves longitudinally of itself and of the platen as well, winding on the right-hand spool and unwinding from the left-hand spools- A gravity pawl 50 pivoted at 51 to the inner face of the right-- hand bracket 33 cotiperates with the ratchet wheel 43 to prevent reverse turning movements thereof and coiled springs 52 confined between the ears 33 and the hubs of the pinions 37 act as brakes on the ribbon spools and thus prevent slackness in the unwound portion of the ribbon. The shaft 39 is maintained in the Fig. 1 position sothat the right-hand pinion 38 engages witlrthe assoforked at its lower end to engage loosely be tween'the flanges of a sleeve 54 fixed to the left-hand end of the drive shaft. The up per end of said arm is reduced'in width to engage'loosely in a slot or notch in a horizontal cross arm 55 which may be'suitably fixed to the upper end of the arm 40. A cross pin 56 bridging said slotprovides a pivot for the arm 53. A U-spring 57 secured by screws to said cross arm 55 carries at its free end a block 58 provided with trans verse inverted V-notches 59. Said notches are adapted to engage with the upper end of the arm 53 which is suitably pointed for the purpose, the arm being thereby held set in adjusted positions. Whenthe pointed end of the arm 53 is engaged with the lefthand notch as in Fig. l, the right-hand pinion 38 is held in operation, causing the ribbon to wind on the right-hand spool, and the left-hand pinion 38 is disengaged from its associate pinion 37. By moving the shaft.

39 endwise toward the left the right-hand pinion'38 is disengaged and the left-hand pinion 38 is caused to engage with its associate pinion 37, the result. bein that the ribbon winds on the left-hand rib on spool, thus reversing the direction of the ribbon feed. During this endwise movement the pointed end of the lever 53 disengages' from the left-hand notch 59 and engages with the right-hand notch 59, and when thus engaged will maintain the shaft 39 set in its new endwise positio Endwise or feed reversing movements of the shaft may be caused either by hand or automatically. The manual means for shifting the shaft consists of a finger button 60 suitably secured to the right-hand end of said shaft, this finger button being also useful to turn the shaft for feeding the ribbon 31 by hand which may at times be desirable. A collar 61 suitably fixed to the shaft is adapted to limit leftward movement of said shaft. The automatic means for effecting the reversal of the ribbon feed comprises pins 62 slidably mounted in the spool shafts 34c and each so con trolled that when the ribbon is entirely unwound from one of the spools the pin will be forced automatically upward into engagement with a worm 63, and will cotiperate with said worm during subsequent turning movements of the shaft to cause an endwise movement of the same sufficient to disengage one driving pinion and render the other driving pinion operative. From Fig. 1 it will be understood that there is a Worm 63 near each end of the shaft 39 andthat these worms are so located that one of them is always in position above and in the path of movement of the associate pin 62.

The carriage carried or auxiliary ribbon 31 is adapted to print on the inner of two superposed work sheets. the outer one being printed by the ribbon 29. These work sheets in the present instance are preferably in roll form,"the rolls being mounted on supporting devices comprising two arms or brackets 64 having laterally extending feet 65 which are secured by screws 66 to the usual arms or supports 67 of the column I stop bar fixed to the rear bar 7 of the carriage truck (Figs; 1 and 5). The inner work sheet p is wound into a roll on a roll holder comprising (Figs. 1 and 5) a core68 and flanges 69, said roll holder being mounted on a rod. or shaft 70, the left-hand end whereof is reduced and bears rotatably in an opening on the associate arm 64 near its upper end, said reduced end being pro- The right-hand end of said shaft is likewise reduced and bears in a yielding bearing device 72 which is slidably mounted on the right-hand arm 64 and is spring pressed leftward. 'By pulling thedevice 72 rightward against its spring it may be disconne'cted from "its shaft 70, permitting the latterand the roll' holder carried thereby to be removed and replaced. The finger button 71 must of course be detached to permit of such removal of the shaft 70. The outer work sheet 2 is somewhat wider than the work sheet ;0 so that its marginal portions extend outward beyond the side edges of the work sheet p. Said work sheet p is likewise wound into a roll which is carried by -a roll' holder that is arranged below the roll holder 68, 69. The lower roll holder likewise comprises a core 73 and detachable flanges74 and is mounted on a shaft 75 which bears at the left in the arm 64: and at the right in a yielding bearing device 7 6, said shaft being rovided with a finger button 77 at itsle t-hand end. The work sheet 79 is led downward from the front of its roll to the rear of the platen and the work sheet p is led downward and forward from the rear of its roll over the platen, the two work sheets passing over the usual paper apron ordeflector 78 (Fig. 2) which is'supporte'd on a rock shaft 79 bearing in the end plates 10. Cotiperating with the platen through suitable openings in the deflector are the sections 80 and 81 respectively of main and secondary feed or pressure rollers, the same being mounted respectively 'on rods or shafts 82 and 83 which are jourvided with a detachable finger button 71.

extendbeyond the edges of the s set 79. While the pressure rollers 80 and 81 -co-, operate with the platen to feed or advance both work sheets under line spacing actuations they are primarily intended for feeding the narrow sheet and additional feeding devices are provided which cooperate 'at all times with the marginal portions of the sheet and either assist the rollers 80. and 81 in feeding the same or may operate alone to I feed said sheet when the rollers 80 and 81 Said additional are released as in Fig. 5. or marginal devices are constituted by short roll sections 91 (Figs. 4 and 7) pivotally mounted between the parallel side arms 92 of carriers which further comprise an integral web 93 connecting said arms, the arms depending loosely from the rock shaft 79. The carriers are controlled by springs 94 coiled around the shaft between the arms 92, one end of each spring being anchored to the shaft 79, the other ends being hooked over the webs 93. Said springs cooperate with the web or cross arm .93 to force the rolls 91 toward the platen. The rock shaft 7 9 may be turned for releasing the rollers and 81 without disturbing the rolls 91 which remain constantly in operative engagement and are effective at all times on the marginal portions of the work sheet 79.

It will be understood that if the platen is turned or line spaced while the rollers 80 and 81 are released, as in Fig. 5, the sheet 7) will be advanced or line spaced'over the sheet 79 which, however, will not, itself, be advanced. If found necessary braking devices may be-associated with theroll holder 68, 69 to prevent accidental advance of the sheet p at such times.

Novel devices are provided for guiding and controlling the superposed sheets after they have been advanced beyond the secondary feed roller 81. and deflector 78. Said devices comprise fingers 95 arranged at the front of the platen and having branches 96 which are suitably secured to the shelves 33 The lower ends of the fingers overlap the deflector 78 so that the-forward edges of the work sheets after leaving said deflector pass into control of said fingers and are confined between said fingers and the platen, being guided upward by said fingers.

From their lower ends the finger-sincline inward toward each other and terminate work sheets and ribbon plies, guidg g devices are provided which are mounte at the top of the extensions 10 Said devices comprise, as shown in Figs. 1, 3 and 4, a supporting bar 97 provided at its ends with pairs of lugs 98 which are seated in depressions 99 formed in the top of said extensidns. Latches 100 pivoted to-the tops of said extensions retain said lugs in their seats but may be swung outward to permit the ready detachment and removal of the cross bar 97 and the parts supported thereon. Screwed to the underside of said cross bar near its ends are downwardly and inwardly curving arms 101 which carry at their ends headed pins 102 which cooperate with parallel diagonal slots 103 formed in a slidable guide plate 104. Said guide plate is generally vertically disposed but has a slight forward inclination downward and is supported on said arms and pins and guided thereby during its up and down movements. These movements are limited by the ends of the slots 103 in cooperation with the pins 102. Normally the guide plate is maintained at the upward limit-of its movement with the lower ends of said slots engaging said pins by a spring 105 which is coiled around a rod 106 fixed to the right-hand end of the guide plate and bearing in a journal 107 on said cross bar 97. Said rod is provided with a head or finger button 108 against the under side whereof said spring presses. It will be observed that in the normal position the upper edge portion of the guide plate 104 is behind the rear edge of the bar 97 and terminates slightly above said bar. Said rear edge is inclined toward the rear, providing a sharp, upper corner which is used for severing the work sheet ;0, said sheet being adapted to pass upward in front of the guide plate and through the narrow opening or space 109 formed between said guide plate and fingers 110. These fingers are fixed to the rear portion of the bar 97 and extend downward and for' ward therefrom assisting to guide the Work sheet 7 upward through said opening. In addition to the slidable guide plate 10% a swinging guide plate 111 is provided, said swinging plate being arranged behind the slidable guide plate. The plate 111 is provided at its ends with lugs 112 which env gage in bearing openings in the extensions 10. The plate 111 normally hangs substan-- tially vertically, leaving anopening 113 between it and the rear face of the guide plate 104. Afinger piece 114 is fixed to the plate 111 near its'left-hand end and extends upward therefrom, providing means for turning the plate 111 on its pivots. When it is desired to guide the inner work sheet p upward at the front of the platen the button 108 is pressed-down, thereby forcing the guide plate 104 downwardbetween the ribbon 31 and'the platen as shown by dotted lines in Fig. 4 so that the sheet p as it is advanced will coi'iperate with the rear face of the lower portion of said guide plate and be guided thereby upward between said guide plate and the laten behind the ribbon 31 and thence in rout of the guide plate 111 through the opening 113. Thus without touching the ribbon with the .fingers the work sheet 72' maybe properly guided and controlled so as to take the desired course through the machine. The guide plate is held depressed by'pressure on the finger button 108 until the sheet 3) has been guided upward as described, whereupon the guide plate is released and restored to normal position by thespring' 105. When in the course of the workit is desired to sever the written portions of the sheets 7) and p,

which have advanced above the guide plates, the' operator pulls forward the finger piece 114 until it is arrested by the engagement of the upper end of the plate 111 with the plate 104 which in turn will have yielded slightly and been forced forward against the cutting corner or edgeof the bar 97. The sheets'may then be pulled forwardand readily torn ofl', the outer sheet'p being severed by the corner of the bar 97 and the inner sheet 79 by the upper edge of the plate 104. Preferably the sheets are pulled forward prior to the clamping operation with just sufficient force to cause the inner sheet p acting against the 11 per edge of the plate 104 to lower said p ate against its spring 105 until the top edge of said plate is about level with the upper face ofthe bar 97 If this is done then, as soon as the subsequent severing operating is completed, the spring 105 will act to force the plate 104 back to normal position, causin itto separatethe freshly torn edges of tie sheets 7) and p,

, thus preventing the clinging'or sticking together of said sheets which might otherwise occur; Means are provided for controlling the ribbon 31 from the feed ro-ll'r'el'ease mechanism so' that said ribbon may be automati-v cally raised to ineffective or inoperative positionor thrown out of use when the feed rolls 80 and 81 are released, thus avoiding the possibility of over-printing one line on another on the sheet'flthro'ugh the ribbon 31. Such over-printing, it will be under stood, might readily oc'curif the ribbon was not thus raised, since owing to'the release of the feed rollers, there would be no advance of the sheet p when the platen was turned thereafter. The connections between the feed roll release and the ribbon mechanism comprise, as shown in Figs. 1, 3 and 5, a rock shaft 115 journaled near its ends in ears 10 projecting rearward from the extensions 10. Fixed to the ends of said rock shaft outside said ears are forwardly extending crank arms 116 provided at their free ends with slots 117 which engage with pins or studs 118 that project outward from the slide heads 35, thus providing a loose connection between the ribbon brackets 33 and said rock shaft. Variability in this loose connection and conse uent variability in the ribbon movement is o tained by making each pin 118 adjustable, a plurality of holes for receiving said pin being provided in the'associate head 35. Fixed to the lefthand end portion of the rock shaft inside the neighboring ear 10 is an upstanding crank arm 119 which is connected by a link 120- with the release lever 90, the construction being such that when the release lever is pushed rearward from the Fig. 3 to the Fig. 5 position to release the pressure rollers 80 and 81 it operates automatically through the described train ofconnections to lift the ribbon brackets 33, together with the ribbon .latch 121 pivoted loosely on the rod 12 near its left-hand end. -A slot 123 in the forward end of said lever engages a headed screw or 7 pin 124 projecting laterally inward from the left-hand end plate 10, said pin and slot con nection limiting the swinging movements of said lever-and also preventing its displace ment lengthwise of the rod 12. The forward arm of the lever 121 terminates in an upturned latching hook 125 which is adapted toengagewith the oif-set horizontalfpor tion 90*" of the release lever 90. The rear arm of said lever 121 terminates in a laterally turned finger piece'126 which may be pressed "down to force the lever to the operas tive or Fig. 5 osition against the pressure of a spring 12 which is coiled around the rod 12 and anchored at one end theietoJ The other end of said spring extendsrea rward anduniderlies the finger'piece 126,-"and'i work sheets, and means operating automatically for throwing one of said ribbons out of the linger piece 126 to raise the hook 125 in front of the off-set 90. With the parts thuslocked it will be understood that a line spacing or turning operatlon c'ommunlcated -150 the platen will serve only to advance the outer. and wider work sheet 79 and that when the-types are actuated this work sheet only will be printed on through the ribbon 29.

' On releasing the lever 90 from the control 10 of the locking hook or latch the released pressure rolls will-return to operative engaifiement with the platen, and the ribbon 31 automatically move down under the "influence of gravity until 1t reaches the oper- 5 ative position covering" the printing line on the platen.

While the present invention is adapted to a variet of uses it was more especially desi ed or use'in writing certain styles of 2 te egr'aphic messages wherein the procedure is such that the operator does not know until just prior to making the transcription whether a duplicate is required or not, and consequently the insertion of a carbon paper I 5 or other transfer medium between the original work sheet and the duplicating work sheet cannot be arranged for until, the last I moment. With prior constructions this resulted in considerable loss of time, but the present invention does away with this loss of time and enables the operator by the touch of a key to throw the copy duplicating devices into or out of use as desired. How ever, it is to be understood that the inven- I 35 tion isnotrestricted to this character of work nor to work where the work sheets are I contlnuous or in web or roll form; and it is further to be understood that parts of the invention may be used without other parts and that various changes may be made without departing from our invention.

What we claim as new and desire to secure by'Letters Patent, is:

1. In a typewriting machine, the combination of a carriage, a platen thereon, means for advancing a plurality of superposed paper webs over said platen, a ribbon cooperatlve with one of said paper webs, a secv zond ribbon cooperative with the other paper I to web, and automatic means for rendering one ofsaid ribbons inoperative on its associate paper web.

2. In a typewriting machine, the combination of, a carriage, a platen thereon, means 56 use'so that it is inoperative on the associate work sheet, the other ribbon being inde- 66 pendent of said last named means.

3. In a typewritin'g machine the combina-- tion of a carriage, a platen thereon, means for advancing a work sheetthereover, means for advancing a second work sheet thereover, a vibratory ribbon cooperative wlth one of said work sheets, rlbbon mechamsm comprising a second ribbon that is normally, maintained opposite the printing line on thefor throwing one of saidribbon plies out of use so that it will be ineffective on its associate work sheet, the other ribbon ply being independent of said means.

5. In a typewriting machine, the combina-.

tion of a carriage, a platen thereon, means for advancing a plurality of superposed paper webs over said platen, hand actuated devices for variably controlling said paper advancing means, a ribbon cooperative with one of said paper webs, a-second ribbon cooperative with the other paper web, means connected with said hand actuated devices for rendering one of said ribbons inoperative on its associate paper web, and severing means for cutting both said paper webs after they have been printed on by said ribbons.

6. In a typewriting machine, the combination of a carriage, a platen thereon, paper controlling mechanism, ribbon mechanism carried by said carriage and comprising a ribbon that is normally maintained opposite the printing point, and means automatlcally operative by said paper controlling mechanism for moving said ribbon away fromthe printing point and for maintaining it in ineffective position.

7. In a typewriting machine, the combination of a carriage, a platen thereon, ribbon spools mounted on said carriage and carrying a ribbon which extends from one spool to the other and is adapted to be brought opposite the printing point on the platen, and means operating automatically for moving said ribbon spools so as to cause the ribbon to cover and uncover the printing point as desired.

8. In a typewriting machine, the, combination of a carriage, a platen thereon, hand controlled paper feeding devices, ribbon spools mounted on said carriage and carry ring a ribbon which extends from one spool to the other and is adapted to cover the printing point on the platen, means connected with said hand controlled devices for moving said ribbon spools so as to cause the ribbon to cover and uncover the printing point as desired, and a second vibratory ribbon mounted on the frame of the machine and independent of saidmeans.

9. In a typewriting machine, the combination of a carriage, a platen thereon, ribbon spools carrying a ribbon which is adapted to cover the printing point on the platen, supporting devices for said spools and said ribbon, and means comprising a key mounted independently of said supporting devices for controlling said ribbon so as to maintain it opposite the printing point and also to maintain it in ineffective position away from the printingpoint during printing op erations. r

10. In a typewriting machine, the combination of a carriage, a platen thereon, means for advancing a work sheet thereover, means for advancing a second work sheet thereover, ribbon mechanism comprising a ribbon cooperative with one of said work sheets, other ribbon mechanism comprising a second ribbon cooperative with the secondof said work sheets, and means operating automatically to throw one of said ribbons out of use so that it will be inelfective during printing operations on the other ribbon.

11. In a typewriting machine, the combination of a carriage, a platen thereon, means for advancing a work sheet thereover, means for advancing a second work sheet thereover, a vibratory ribbon cooperative With one of said work sheets, ribbon mechanism comprising a second ribbon that is normallymaintained opposite theprinting line on the platen and is adapted to cooperate with the other of said work sheets, means operating automatically to move said second ribbon away from the printing point thus rendering it inefi'ective during printing operations on the other ribbon, and devices for maintaining the ribbon in inefl'ective position.

12. In a typewriting machine, the combination .of a carriage, a platen thereon, a plurality of superposed work sheets, ribbon mechanism for feeding and supporting a plurality of ribbon plies each adapted to cooperate with one of said work sheets, and means operating automatically to throw one of said ribbon plies out of use so that it will be ineffective on its associate work sheet during printing operations onthe other work sheet.

13. In a typewriting machine, the combination of a carriage, a platen. thereon, a ribbon normally covering the printing point on said platen, means operating automatically to move said ribbon away from the printing point, and devices to hold said ribbon locked at the end of such movement.

14. In a typewriting machine, the combination of a carriage, a platen thereon,

means on the carriage for supporting a ribbon so, that said ribbon covers the printing point on the platen, and automatic means for moving said supporting means so as to carry the ribbon bodily away from the printing point.

15. In a typewriting machine, the combination of a carriage, a platen thereon,

means on thecarriage for supporting a ribbon opposite the printing point on the platen, and automatic means for moving said supporting means so as to carry the ribbon bodily away from the printing point, said last recited means being controlled by a key on the carriage.

16.-In a typewriting machine, the combination of a carriage, a platen thereon,

means for advancing a'plurality of work sheets thereover including releasable paper feeding devices, ribbon mechanism comprising a plurality of ribbon plies each cooperating with one of said work sheets, and means connected with said releasable devices for automatically throwing one of said ribbon plies out of use.

17. In a typewriting machine, the combination of a carriage, a platen thereon, re-

mounted on said carriage and carrying a ribbon which extends from one spool to the other and is adapted to cover the printing 'point, and means controlled by sald releasable devices for moving said ribbon spools so as to cause the ribbon to cover and uncover the printing point as may be desired.

19. In a typewriting machine, the combination of a carriage, a platen thereon, releasable paper feeding devices cooperative with the platen, a carriage carried ribbon, and connections betweenv said ribbon and said releasable devices operative to move said ribbon out of the printing field.

20. In a typewriting machine, the combination of a carriage, a platen thereon, a pressure roller cooperative with the platen, releasing devices for said roller comprising a release key, a carriage carried ribbon, and connections between said ribbon and said release key for bodily moving said ribbon transversely of the printing line so as to carry said ribbon out of register therewitl'l.

21. In a typewriting machine, the combination of a carriage, a platen thereon, a pressure roller, releasing devices therefor comprising a release key, ribbon spools on said carriage, and devices for bodily moving said ribbon spools relatively to the carriage, said devices being operative from said release key.

22. In a typewriting machine, the combination ofa platen, marginal feed rollers cooperatively only with a wide work sheet, intermediate feed rollers cooperative both with the wide sheet and with a narrow sheet that passes between the marginal rollers, said wide and narrow sheets being superposed, ribbon mechanism comprising plies of ribbon one interleaved between the work sheets and normally opposite the printing point, means for releasing the intermediate feed rollers, and devices for moving the interleaved ribbon ply to one side of the printing point and for maintaining it in ineffective position.

23. In. a typewriting machine. the combination of a platen, marginal feed rollerscooperative only with the wider of two superposed work sheets, intermediate feed rollers coiiperative with both sheets, ribbon mechanism comprising plies of ribbon one interleaved between the work sheets and normally opposite the printing point, means for releasing the intermediate feed rollers, and devices automatically actuated by the feed roller releasing means for moving the interleaved ribbon ply to one side of the printing point and for maintaining it in ineffective position.

24. In a typewriting machine, the combination of a carriage, a'platcn thereon, paper feeding mechanism, devices including a finger key for controlling said mechanism, ribbon spools mounted on said carriage and carrying a ribbon which extends lengthwise of the platen and normally is opposite the printing line, means for rotating said spools on their axes to feed the ribbon longitudi vnally from one to the other, and means operative by said finger key for moving said spools bodily to carry the ribbonto one side of the printing line to render it ineffective when the type bars are actuated.

25. In a front-strike typewriting machine, the combination of a carriage, a platen thereon, paper feeding mechanism, devices including a linger key for controlling said mechanism, ribbon spools mounted on said carriage in front of the platen and near the ends thereof, said spools carrying a ribbon whichpasses from one spool to the other along the front face of the platen and close thereto so that it is normally opposite the printing line, means for rotating said spools to feed the ribbon lengthwise of the printing line, and means operative by said finger key for moving said spools bodily in a substantially vertical direction to carry the ribbon to one side of the printing line so that it will be in ineffective position.

26. In a front strike typewriting machine, the combination of a carriage, a platen thereon, ribbon spools mounted on said carriage in front and near the ends of the platen, said spools carrying a rlbbon which passes from one spool to the other along the front face of the platen and close thereto so that it is normally opposlte the printing line, means for rotating said spools to feed the ribbon lengthwise of the printing line, means for automatically moving said spools bodily in a substantially verticalv direction to carry the ribbon to one side of the printing line so that it will be in ineffective position, a second ribbon .Vibratable in front of the platen forward of the first ribbon, and means for controlling a plurality of work sheets that are fed around the platen and interleaved. with said ribbons at the front of the platen so that.

one of said sheets may be advanced independently of another.

27. In a front-strike typewriting machine, the combination of a carriage, a platen thereon, ribbon spools mounted on said carriage in front of the platen and near the ends thereof, said spools carrying a ribbon which passes from one spool to the other along the front face of the platen and close thereto so that it is normally opposite the printing line, means for rotating said spools to feed the ribbon lengthwise of the printing line, means for moving said spools bodily in a substantially vertical direction to carry the ribbon to one side of the printing line so that it will be in'ineffective position, a second ribbon vibratable in front of the platen forward of the first ribbon, means for controlling a plurality of work sheets that are fed around the platen and interleaved with said ribbons at the front of the platen so that one of said sheets may be advanced independently of another, and devices connected to the spool moving means for releasing one of the work sheets from the paper controlling means.

28. In a typewriting machine, the combination of a platen frame comprising end bars, a platen on said frame, supports slidable onsaid end bars, ribbon spools rotatable on said supports and carrying a ribbon which extends lengthwise of and is opposite to the printing line on the platen, and key controlled means for moving said supports to cause said ribbon to uncover the printing point, said means comprising a rock shaft journaled on said end bars, a pair of crank arms fixed to the ends of saidrock shaft and loosely connected to said supports,

a key lever, a third crank arm, and a link connecting said key lever with said third crank arm.

29. In a typewritingmachine, the combination of a platen frame comprisin slotted end bars, a platen on said frame, brackets' or supports having portions slidably. engaging in the slots in said end bars, ribbon spools rotatable on said supports, guides on said supports over which the ribon is led from said spools and directed lengthwise of the platen, a rock shaft, crank arms thereon loosely connected with said supports, and key operated means for rocking said shaft.

30. In a typewriting machine and in ribbon mechanism, the combination of two ribbon spools, the ribbon passing from one spool to the other, pinions one for each spool, a ribbon driving shaft provided with driving pinions One for each first named pinion, means for turning said shaft, means for moving said shaft back and forth endwise to predetermined positions to cause the driving pinions to operate in alternation, and detent devices for maintaining said driving shaft in said positions, said detent devices comprising a lever pivoted between its ends, one arm of said lever being forked to engage loosely with said driving shaft and the opposite arm of said lever being pointed, and a U-shaped detent spring provided at its free end with a block formed With V-notches with which said pointed end is adapted to engage in alternation.

31. In a typewriting machine, the combination of a carriage, a platen thereon, ribbon spools mounted on said carriage and carrying a ribbon which extends from one spool to the other and is adapted to cover the printing point on the platen, and means for moving said ribbon spools to cause the ribbon to cover and uncover the printing point as desired, said moving means being variably settable normally to vary the movement of the ribbon during the covering and v i: uncovering operations.

32. In a typewriting machine, the combination of a platen, means for feeding a plurality of work sheets thereover in superposed relationship, ribbon ieeding mechanism' for plies of ribbon associated with said work sheets, and means for at will withdrawing one of said ribbon plies from use and for rendering the paper controlling devices for one of said work sheets inoperative at the same time. I

33. In a typewriting machine, the combination of a platen, mechanism for feeding a ribbon that extends along the platen close to the printing line, and a key cont-rolled paper guiding plate for temporarily moving the ribbon away from the face of the platen and catching the advancing edge of a work sheet to guide it upward over the platen and between the same and the ribbon.

34. In a. typewriting machine, the combination of a platen, mechanism for feeding. a ribbon that extends along the platen close to the printing line, a key controlled paper guiding plate, and a spring for main-- taining said guiding plate in normal 1noperative position, said guiding plate being operative to temporarily move the ribbon away from the face of the platen and catch the advancing edge of a work sheet to guide it upward over the platen and between the same and the ribbon.

35. In a typewriting machine, the conibination of a platen, mechanism for feeding a ribbon that extends along the platen close to the printing line, a key controlled paper guiding plate for temporarily moving the ribbon away from the face of the platen and catching the advancing edge of a work sheet to guide it upward over the platen and between the same and the ribbon, and a second pivotally supported deflecting plate for 00- operating with the work sheet after it leaves the platen.

36. In a typewriting machine, the combination of a platen, mechanism for feeding a ribbon that extends along the platen close to the printing line, a key controlled paper guiding plate for temporarily moving the ribbon away from the face of the platen and catching the advancing edge of one of two superposed work sheets to' guide it upward over the platen and between the same and the ribbon, a second pivotaliy supported de flecting plate for coiiperating with the work sheet after it leaves the platen, and a bar with which said plates cooperate to sever said work sheets.

37. In a typewriting machine, the combination of a platen frame, mechanism for feeding a ribbon that extends along the platen close to the printing line, a key controlled slidable paper guiding plate for temporarily moving the ribbon away from the 7 face of the platen and catching the advancing edge of a work sheet to guide it upward over the platen and between the same and the ribbon, a second pivotally supported de fleeting plate for cooperating with the work sheet after it leaves the platen, and a bar with which said plates cooperate to sever said work sheet and also to sever a second work sheet which is fed over the platen in superposed relationship with the first work sheet, said bar serving as a guide for said second work sheet and also as a support for said slidable deflecting plate.

38. In a typewriting machine, the combination of a platen frame, mechanism for feeding a ribbon that extends along the platen close to the printing line, a key com trolled paper guiding plate for temporarily moving the ribbon away from the face of the platen and catching the advancing edge of one of two superposed work sheets to guide it upward over the platen and between the'same and the ribbon, a second pivotally supported deflecting plate for coii'perating with the Work sheet after it leaves the platen, and a bar detachably mounted on the platen frame and provided with fingers tei minating in headed pins which cooperate vwith slots in said key controlled guiding plate to guide the same during its moveof March, 1914.

names to this specification in the presence ments to and from operative position, said HARRY WILLIAM HIGHAM. hair guiding thesecond of said work sheets PHILEMON RISLEY. and cooperating with said plates to afford Witnesses:

severance of said work sheets. 7 MARY JOHNSTON WHITE, In testimony whereof we have signed our ALBERT QAWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPatents,

' Washington, D. Q.

of two subscribing Witnesses, this 12th day 10

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