US1764900A - Typewriting machine - Google Patents

Description

` l June 1930. l I J. AJB. *sMl'lrH Y i 1,754,900

TYPEWRITING MACHINE Filed Maron 24, 1927 4 sheets-sheet 2 June 17,f1930. l -J. A. B. SMI-n 1,764,900

TYPEWRITING MACHINE Filed 'Marcha/1,1927 4 sheets-'sheet s Juge 17, 1930. J, A B, SMITHl 1,764,900

TYPEWRITLNG MACHINE Filed March 24, 1927 4 sheets-Shen. 4

Patentcui June 17, 1930 4UNITEDs'ra'rrzs PATENT OFFICE JESSE A. B. "SMTH, OF STAMFORD, CONNECTICUT, ASSIGNOR TO UNDERWOOD LLIOTT- FISHER COMPANY, 0F NEW YORK, N. Y., A CRPORATION 0F DELAWARE TYPEWRITING MACHINEv Applica-mn med March 24, 1927. serial No. 177,884.

a ribbon-spool at each end of the carriage `above the platen, feeding the ribbon from spool to spool at each actuation of thev linespacemechanism, directing the ribbon from each spool to the typing line, and providing a protective tape to prevent offsettingof the characters upon the outer Work-sheet.

Features of improvement inthe present invention include' a 'simplified ribbon-spool and the manner of demountably suspending the spool Within its housing; a simplified ribbon-spool-driving connection -to the linespacing-devices; a novel manner for alternately rendering each spool operative to feed the ribbon over the typing line in opposite directions; ribbon-clamping means operative at all times to prevent the formation of a slack in the longitudinal stretch of the ribbon over the typing line, except during the interval of line-spacing the platen when the feeding of the ribbon takes place; protective devices to cover the ribbon that are adjustable to the width and position of the outer along the carriage to prevent sagging of the work-sheet; means automatically operable by the shifting of the ribbon to inoperative positions to disconnect the spool-feeding mechanism from the line-spacing mechanism means operably connectible to the ribbonshifting mechanismto simultaneously raise a pair of paper-holding devices from the face of the platen a center support adjustable ribbon between the ribbon-carriers positioned at each end of the carriage; a ribbonclamping device automatically released by the line-spacing mechanism or manually released at will; paper-holding'devices actuated by the ribbon-shifting mechanism to automatically raise the devices when the auX- iliary ribbon is shiftedJ clear of the platen for the adjustment of a wide record-sheet; andribbon-guides at each end of the typing line operable to deflect the 'xed plane of the ribbon at the typing line to the fixed feeding plane of the ribbon-spools, and adjustably mounted to compensate for variations in the assembly of the parts to establish a uniform tension at both edges of the ribbon,to hold the ribbon in a 'lat state during its travel from spool to spool. l

No claim is herein made to cover broadly any feature disclosed in co-pending applications of Hausman, No. 118',740, filed June 26, 1.326, and No'. 755,915, filed December 15,

Other features and advantages will hereinafter appear. A v

In the accompanying drawings,v

. l Figure 1 is a perspective vicw of the platen and port-ions of the carriage-frame illustrating the manner of assembling the auxiliary ribbon-feeding andribbon-controlling merlianisms upon the carriage-ends, including connections from the line-spacing lever to feed the ribbon-spools, ribbon-shifting connec- -tions-operable to raise the ribbon above the sov the face of the ribbon, and also operates as Y a center support for the auxiliary ribbon.

Figure 4" shows a modified form of coutrol for a rock-shaft carrying paper-fingers operable above the typing line to hold a wide work-sheet against the platen-face.

Figure 5 shows the same mechanism as Figure 4 shifted to a position where the rocking vof the shaft raises the paper-fingers to inoperative positions.

Figure 6 is a full-size front elevation of the platen-carriage ends and ribbon-spool mountings at eachjside of the carriage, the view being condensed by breaking away the middle sections of the platen and carriage.

Figure 7 is a reduced view of the left-hand end ofthe carriage with portions of the frame broken away, and the ribbon-shifting mechanism relatively positioned where the auxiliary ribbon is raised above the typing line and close to the face ofthe platen.

Fi ure 8 shows some of the parts of Figshifted to extreme raised positions where the auxiliary ribbon has been shifted 'from the position of Figure 7, to remove the ribbon to a clearance position for the front insertion of a work-sheet.

Figure 9 is aI full-size view of the left-hand carriage-end, showing all the connecting mechanisms in normal positions with thev auxiliary ribbon covering thel typing line.

Figure 10 is a skeleton view of the lefthand ribbon-spool and its feeding mechanism actuated by the initial movement of the linespace lever to bring vthe `ribbon-spool-driving pawl into engagement with the spooldriving ratchet-wheel, and the auxiliary ribbon-clamping elements released to free the ribbon before any spool-feeding movement is conveyed to the pawl to feed the auxiliary ribbon.

Figure 11 is a full-size vertical cross-sectional view through the platen and carriage, lookingtowards the right-hand ribbon-spool, with the several parts in 'normal or operative positions. i

Figure 12 is a view drawn to the same as Figure 10, and showing the same parts positioned at the end of the line-space movement where a ribbon-feeding movement has taken place, and the auxiliary ribbon-clamping elements have been restored before the ribbon-spool is released from its driving pawl.

Figure 13 is\a view of the left-hand carriage-end showing the several parts in normal positions ready for typing and manifolding a line-record, both primary and auxiliary ribbons assuming parallel vertical planes over the typing line, and the auxiliary aperingers in operative position to hols. and

direct the alignedv record-sheet tothe rear.

of the platen.

Figure 14 shows the arts of Figure 13 raised to the sheet-inserting position, where the feed-rolls are released from the platen and the' paper-fingers lifted, so that the worksheet, when insermted at the rear of the fplaten, will have a clear passage across the t ping line to be deflected under the papenngers.

Figures 15, 16 and 17 are operational views, showing the paper-fingers and their controlling connection at three different positions relatively to the platen; Figure -15 show s the normal position of the and its connection to the manually-operated 'rock-shaft; Figure 16 shows the paper-fingers in operative relation to thef platen, .but

the connection to the rock-shaft has been scale aper-finger Figure 18 is a view, in perspective, showing the ribbon-shifting rock-shaft and the connection from said shaft to the rockable lshaft carrying the two a r-ingers. The

view also shows in deta' t e manner o f asv sembling the paper-fingers to' their rockshaft, and also shows the relation ofthe paper-fingers to the several work-sheets and auxiliary ribbon.

The platen 20 rotates witlia platen-shaft 21 having bearings within carriage-ends 22 and provided with a line-spacing mechanism including a line-spacing lever 23, engageable to operate a slide'- ar 24, carrying a pawl 25, operative to engage with the teeth of a ratchet-wheel 26 secured to the shaft 21 to rotate the platen aline-space distance at each actuation of the lever 23.

, The carriage-ends 22 are joined together at the rear of the platen bythe usual paper-table 27 that curves under the platen to serve as a paper-deflector to guide work-sheets to the typing line or to guide work-sheets under. the platenl towards the rear when a sheet is collated by a front insertion.

A bracket 28 issecured to each carriageend 22 by screws 29, to rovide bearings at each end of the carriageor a ribbon-feeding driving shaft 30, a ribbon-feeding rock-shaft 31, a ribbon-feeding rock-shaft 31, and a paper-linger rock shaft 32, all mounted parallel to the platen.

The shaft 30, next to the offset face of the left-hand bracket 28, has a one-way ratchetwheel 33 secured thereto and provided with a driving means including a lever 34 fulcrumed upon the shaft between the ratchetwheel 33 and a collar 35, and having an arm 36 supporting a pawl 37 pivoted thereupon and provided with a spring 38 to hold the pawl in operative engagement with the teeth of the ratchet-Wheel 33 at all times to drive the ratchet and shaft30 in a positive direction, 'assured by a suitable lspring-pressed check-pawl 39 engaging said ratchet.Ir The arm 36 has a pivotal connection to one end of a link 40 'pivotally connected to the rear end p of the slide-bar24 of the line-spacing mechanism, all the connecting. parts being held in normal positions under the tension of a spring 41 that restores the bar, after each line-spacing movement, against the stop on the frame in the usual Underwood manner. The spacing movement of the bar 24 operating through the link 40 vibrates the arm 36 to lswing the pawl 37 to rotate the ratchet-wheel -33 and shaft 30 one tooth distance to swing the lever 34 -forwardly. The free end 'of the lever 34-carries a shouldered stud 42 to en gage Within aA slot formed in the end of an inverted L-shaped lever 43 having a fulcrum upon a long shouldered stud 44 carried upon the end of an arm 45 adjustably secured to the shaft 31.v The adjustment` ofthe parts -is such that when the stud 42 and the lever 443 are at their normal positions a vibratory movement of the lever 43 Will withdraw the slot in the end thereof from the stud 42, as shown in .Figure 7, and should a vibratory movement be conveyed tothe lever 34 in 1inespacing, no movement will be conveyed by the stud 42 to the lever 43. When the lever 34 is vibrated in line-spacing and thestud 42 is seated in the slot at the end of the lever 43, the forward swing of said lever 34 will raise the lever 43 forwardly to rock the shaft 31a and its` connections for purposes to appear. The brackets 28 may be formed with ears 46 at the front edge thereof, upon which there. is mounted a cross-bar 47 secured by screws 48 and arranged parallel to the platen. Upon this bar 47 adjacent the carriage-ends there are mounted- U-shaped ribbon-spool brackets 49 and 50,'each bracket formed with parallel side walls 51 and52, and between the upper ends of the side walls there are housed ribbon- spools 53 and 54, respectively, upon spool-shafts 55. I

The connections of both ribbon- spools 53 and 54 and their controlling and feeding mechanisms are identical, except for the right and left hand assembly of the parts,

and the description of one spool and its connecting mechanism will also be descriptive of the companion spool. A spacing Washer 56 is staked to the side wall I52 of the bracket 49 and tapped centrally to receive the threaded end of the shaft 55. A bearing stud 57 is staked to the vvall 51 to project inwardly and provide a support for the opposite end of the shaft, the shaft having a knurled head 'n 58 shouldered down to bear against the wall 51 and operate to draw the two walls 51 and together. A sleeve 59, slidably` assembled over the stud 57. is provided With a flange 60 at one end and a spring 61 compressible between said flange and the face of the Wall 51. The ribbon-spool includes heads secured to a core 62 slidably mounted upon a sleeve 63 secured to a ratchet-wheel 64'provided with ing of the ends of the spring also preventing turning of the sleeve 59 upon the stud l57.

To adjust the spool to the conditions shown its ratchet 64 adjusted between the flange 60 and the washer 56, when the shaft ispassed through the stud 57 and the sleeve 59, and threaded intolthe ivall 52. The spool and the ratchet-Wheel 64 are rotatable upon the shaft 55 under a certain restraint from the stationary spring-pressed `flange 60 bearing against the face of the ratchet.`

To rotate a ribbon-spool and draw the ribbon across the typin position, there is provided a crankarm 6 adjustably secured to the rock-shaft 31n and carrying a feeding pawl 68 on the end thereof formed with a tooth 69 engageable with the teeth of the ratchet-wheel at the side o f the ribbon-spool, and an arm 7 O having a stoppin 71 normally engaging the edge of the arm 67 under the tensionof a spring 72 flexed between the pin 71 and a similar pin 73 upon the arm 67. The normal position of the pawl, determined by the pin 71, holds the tooth 69 of the pawl clear of the ratchetteeth but the initial for Ward movement of the arm 67 swings the y swing the pawl 68 in a ratchet-feeding direction to rotate the ribbon-spool.

As there is a crank-arm 67 and a pawl 68 secured to each end o'f the shaft 31a'to rotate both spools 53 and 54, it is necessary to provide means to silence one pawl-fed spool While the opposite pawl is operative to feed a ribbon-spool. It will be remembered that the pin 71 operates to normally hold its associated pawl 68 out of operative engagement with the ratchet 64, and with the teeth of both paWls bentv in opposite directions, as shown, and so spaced relatively to the spacedoff spools that when one pawl is operative at `the spool 54, the opposite pawl is inoperative at the spool 53, and as shown at Figure 6, the shifting of the rock-shaft 31a in the direction of its axis reverses the positions of the pawls relatively to the spools. To this end, the shaft 31a is provided with a stop-collar 74 -to abut the face of the left-hand bracket 28 to locate the pawl 68 to the spool 54, while a 'hub 75 will arrestthe rightw'ard shift of said shaft 31a to render the pawl 68 inopera tive tothe spool 54 and render the opposite pawl 68 operative to feed the spool 53. To lock the shaft 31a at either of the shifted positions, the hub 75 may include a V-shaped disk 76 that co-operates withv a V-shaped spring 77 secured to the adjacent bracket 28, said-disk riding under the sprin lto either side of 'the V thereon, and the sprlng not interfering with the rocking of the shaft 3 1. The free ends of the shaft 31a outside the `by the line-spacing mechanism operates to bracket 28 ma be provided with convenient push-buttons 8.A It will be noted that the long stud 44, which is shifted with the shaft 31 and has a fulcrum on the lever 43, does not interfere with the operation of said lever at either shifted position o'f said shaft.

' Upon the front face of the bar 47 there are secured by screws 48 the feet of a air of brackets 79, one bracket positioned a jacent each end of the carriage and each bracket formed with an arcuate slot 8O concentric with the sha'ft 31, and a compound slot formed by the merging of two arcuate slots 81 and 82. Forwardly-extending crankarms 83 are secured to the rock-shaft 31 to ali with the side face of each bracket 79, with t e 'free ends provided with studs 84 that pass through the-slots 80.to pivotally sup ort the upper ends of a pair of verticallyisposed arms 85, each arm being held upon one stud 84 and against the adjacent face of a bracket 79 by screws 86 threaded into the studs. The lower terminals of the arms 85 carry shouldered studs 87 that pass through slots 82 and are slidably held against the 'faces of the brackets 79 by the h ads of the studs bearing against the opposit faces of said arms.

The arms 85 are formed with extensions 88 bent over at the ends to form feet 89- that may be secured to the ends of a cross-bar by screws 91. These two arms 85 secured to the j ends of a bar 90 form a cradle that is rockable to varying positions through the pivotal connections to the arms 83 and the joint effect of the studs 87 following a, path directed by the two slots 82.

At each end o'f the bar 90 there is mounted a ribbon-ca ingv and ribbon-guiding plate 92 formed with a ribbon-delecting angular slot 9 3aligned to the vertical planes o'f the ribbon- spools 53 and 54. These plates 92 depend from the bar 90 to present a horizontal section of the auxiliary ribbon to the typing plate may be rocked about its pin 94 to change the relative angularity1 of the slot 93 that operates to take u any slack at either edge of the ribbon. I this adjustment becomes frequent the two screws 91 may be displaced by'a thumb-screw. Each plate^92 is formedwith an offset 96 to position the ribbon-carrying slot 93 in a plane tangent to the typing axis of the platen, instead of pitching the` 4operating lever 97 secured thereto and formed with a finger-piece 98. The raising of the linger-piece 98 results in rocking the sha'ft 31 to raise the arms 83 to advance the studs 84 along the clearance slot 80, to lift the ribboncarrying cradle 85, 90 and advance the studs 87 a ong the uide-slots ,82, from the normal position of F1 ure 11 to the positions shown at Figure 7. he curvature of the slots 82 cooperating with the arcuate aths o'f the studs 84 results in holding the r1 bon close .to the face of the platen at both the operative and inoperative shift-positions thereof, clearly shown at Figure 7.

Each arm 85 of the ribbon-cradle is formed with a cam-face 99 which, when positioned as at Figure 7, is about to enga e with a'pin 100 in the lixedbracket 79. hould the lever 97 be raised from the Figure 7 position to the position of Figure 8, it will be noted that the stud 87 is close to the upper end of the slot 82, and further movement of the stud will be blocked by the edge of the slot 81, which is. nearly atri ht angles to the direction of the slot 82, an the further actuation of the lever 97 would be diicult, if not im ossible. To' overcome this condition, w ich could not be remedied by any angular readjustment of the two slots 81 and 82, each arm 85 engages the pins 100 to cam the lower ends of said arms and direct the lswing of the' studs 87 to the curvature of the slots 81, and thus remove 4any frictional contact between studs 87 and the sides of said slots 81 when the lever 97 is swun to the osition of Fil ure 8 to rock the auxiliary ribonforward y and upwardly, as when a work-sheet is removed, or a new sheet ad- 'usted around the laten. It will be rememered that the cra ling ribbon-carrier is suspended from the arms 83, and an interruptivc swin 'ng movement is given to the carrier by the s ots 82, and by the cam-faces 99. The

two slots 80 and 81 are clearance slots within the two brackets 7 9, and primarily prevent endwise movement of the ribbon-carrier slidabl assembled between the brackets.

'IYhe arm 83 at the. left-hand end of the carriage has a shouldered' screw or stud 101 at the side thereof to ass through a slot 102 in L the forward end o the lever 43. When the lever 43 is positioned as at Figures 1 and 9, the actuation of the line-space lever 23 will. cause the lever 34 to swing the lever 43 to rock the shaft v31aL and effect a pawl-feeding movement to one ribbon-spool. Said lever 43, during its swing with the shaft 31, causes its slotted forward end to slide under the bon-clamping levers 105 upon pivots 106,-

. finely timed to any part of the ribbon-shift-v head of the stud 101, as shown at Figure 12. Vhen the lever 97 is raised to the position of Figure 7 to shift the ribbon to the inoperative position, the stud 101 hastraveled along the slot- 102, and the lever 43 has been vibrated about its fulcrum 44 to withdraw the slotted end thereof from the stud 42, and linespacing movements' given to the platen during the interval. the ribbon is inoperative will idly vibrate the lever 34 and will not effect a ribbon-feeding movement of the winding-up ribbon-spool.

To control the slack in the ribbon when vthe ribbon carrier is raised by the lever 97, fingers 103 may be secured to the face of the cross-bar 47 adjacent each ribbon-section between the spools and the ribbon-carrier.

When the ribbon-carrier is shifted to the position of Figure 7, a slack exists in the ribbon and when any slack appears in the longitudinal stretch of the ribbon between the two carriers the operator is never sure that the auxiliary ribbon really covers the typing line, especiallyat the center thereof. Means here- 'to have been provided to clamp or retard the ribbon at some point between the spools and the carriers to prevent this slack from entering the line-typing section of the ribbon. But these ribbon-clamps depend upon an initial movement of the ribbon-carrier before the clamps become eective, and the ribbon is really loose before it is clamped. v

In the present construction, there isprovided a bracket 104 secured to the bar 90 adjacent the inner edge of each vertical section Y and Z of the ribbon X to support ribeach lever including a linger 107 bent at right angles to overlie the ribbon at a point over the offset face 96 of each plate 92, a fingerpiece 108 at the upper end of said leverand a tail-piece 109 passing over the edge of the cross-bar 90 to the rear thereof. A spring 110, under tension between a pin-onthe lever 105 and a pin on the bracket 104, operates to normally hold each finger 107 in clamping engagement against the ribbon and against the offset faces 96, and always holds the ribbon clamped to the plates 92 regardless of the shifted position of the ribbon-carrier, and hence there isno mechanism to be ing mechanism before the ribbon is clamped to prevent a slack in the ribbon across the typing line. While the ribbon-feeding mechanism, actuated'by the line-space lever, is operative to draw the ribbon under the two clamping fingers 107, it is desirable tore.-

lieve the line-space lever of this unnecessary:

burden, and means are provided whereby the forward line-spacing stroke will automat.

ically release the ribbon-clamps before a ribbon-feeding movement, and automatically restore the clamps at the end ofthe line-space the lower end of each lever 113 may be formed with a bent-over finger 115 to normally abut the tail 109 of the clamping lever 105. Each lever 113 has a pin 116 timed to normali drop into a groove 112 in the adjoining disk 111.` When the shaft 30 is rotated one tooth- .distance the initial movement thereof causes each pin 116 to ride out of a groove 112 and upon the periphery of disks, and said pin operates to vibrate its lever 113 to press upon its tail-piece 109 to vibrate the levers 105 and release the ribbon atboth .plates 92. This releasing movement takes place while the pawl 68 is moving into engagement with the ribbon-spool ratchet and before any ribbon-feeding movement takes place. At the end of the line-spacing stroke the pins. 116 will ride od the periphery of the disks 111 into the advancing groove 112, and the levers 105 will be released to the action of their springs 110 to reclamp the ribbon to the plates 92 before the ribbon-feeding spool is released by the return movement of the pawl 68.

lVhile the ribbon is clamped at all times except during the spool-feeding interval, one or both ribbon-sections may be released at will by a-manual depression of either lingerpiece 108.

Both ends of the shaft 31, outside the brackets 28; may have secured thereto a detent sector 117 formed with three detentgrooves 118, 119 and 120. To coact with these grooves a pawl 121 is pivoted upon the face of each bracket 28 and actuated by a spring 122 `to engage within th'e grooves when the sector 117 is rocked with the shaft, the groove 118 indicating the position of the shaft wherethe ribbon normally covers the typing line, the groove 119 indicating the position of the ribbon-vibrator raised to the position of Figure 7, and the groove 120 becoming operative to hold the shaft and its associated parts in the positions of Figure 8.

The platen may be provided with collating tables 123 of well-knownform, and sheetfeeding rollers 124 to feed a wide record-sheet B next to the platen, and a narrow superposed work-sheet C, the auxiliary ribbon X being operable between the two sheets to manifold the record-sheet and the regularinked ribbon 125 to type upon the'narrow outer work-sheet.

To prevent the auxliary''iibbon X from'offsetting upon the back face of the outer sheet,

'ribbon and the sheet C. The method of suspending the tape over the face of the ribbon, and at the same time adjusting the length of the tape to the width and relative position of the narrow superposed sheet C, includes a pair of carriers 127 adjustably mounted upon theA bar 90. Each carrier 127 is formed with an angular slot 128 to turn the ends ofthe horizontally-disposed tape at right angles to pass over `the bar 90 and under a clamping tongue 129 forming a part of the carrier, to be clamped there-between by a thumb-screw 130 threaded into the bar 90. The carrier 127 may have its top edge bent at right angles at n 131 to ride along rthe top ed e ofthe bar 90.

With such a construction t e tape may be placedunder a considerable tension between the two carriers without developinga strain in the ribbon-carryin ends.

The adjustment of t 'e length of the tape to the width of the narrow work-sheet provides for a comparatively short stretch of tape between the two carriers 127, and little trouble is experienced from the sagging of the tape.

The long stretch of the ribbon, however, be-` tween-the two plates 92 adjusted to a wide carriage, is considerable, and to prevent the sagging of the ribbon the spool-brakes must be placed under an excessive tension which the line-spacing mechanism must overcome in feeding the ribbon-spool. To remove this tendency of the ribbon to sag, and reduce the drag at the spool and correspondingly reduce the line-spacing resistance, the tapecarrier 127 positioned at the right-hand side of the narrow sheet C may be formed with a vertical slot 135. The auxiliary ribbon may be adjusted in front of a tongue 136 to enter the vertical slot 135, and then pass tothe rear of the carrier 127to provide a center support for the auxiliary ribbon X and .practlcally prevent any sag in the ribbon. In this manner the protective tape-carrier 127 also begmes a center support for the auxiliary ribsuitable tally-roll mechanism may be em-v ployed with the two work-sheets B and C when required. This mechanism includes a gear 132 on the drive-shaft 30 to drive a gear 133 and a spool 134 operative to windup a tally-strip fed laround the platen to receive abbreviated work-sheet records.

In certain forms of oice records the wide work-sheet B may have paper-holding dearm 137 secured to the left end of said shaft 'and connected b forming a part o the sector 117. The aperholding devices are adjustably mounte, upon the shaft 32, each device including an arm 140, a paper-finger 141 and a roll 142.` Each arm 140 is bent U-shaped at the rear to provide two widely separated bearings for the arm. Between the bearings a collar 143 is assembled upon the shaft 32, a metal strip 144 being secured to thecollar, said strip having one edge 145 turned down to confine one bearing of the arm 140 between said edge and the collar and then enter a groove 146 cut longitudinally in the shaft 32. The strip 144 provides a means for securing one end of a spring'147 coiled about the shaft 32, with the opposite end hooked over the edge of the arm 140 to throw said arm towards the plate. The fcontact of the paper-finger 141 with the platen arrests the action of the spring 147, while an equalizing spring 148 is secured between the crank-arm 137 and a pin 149 on the bracket 28. The relation of the paper-finger to the shaft 32 is such that the part 145 that enters the groove 146 in the shaft 32 shall have a slight free movement to enable the spring 147 to actuate the paper-finger independently of the shaft 32, which is a well-known construction.

When the shiftlever97 is raised from the normal position of Figure 13 to that of Figure 7, and4 While theribbon is vraised above the typing line, the connection 138 assumes the position of Figure 16 relative to the arm 137 and the paper-fingers are operative against the work-sheet B. When the lever 97 is raised to the position of Figure 14 and the auxiliary ribbon is swung clear of the platen, the connection 138 pushes the crankarm 137 to the position of Figure 14 and the paper-lingers 141 are raised from the platen so asnot to interfere with the insertion or withdrawal of the work-sheet.

Should it be found that the raising of the paper-fingers 141 with the ribbon-shifting mechanism be burdensome for the lever 97. a separate manual operation may be substituted for the automatic operation, of raising the fingers through the connecting link 138 and arm 137. At the right-hand end of the shaft 32 an actuating lever 150 may be secured thereto with the lower end connected by spring 151 to a pin 152 at the bracket 28. The upper end of the lever 150 may be bent over to form a finger-piece 153. The normal position of the lever 150 is determined by the interlock of a latch 154 pivotally hung at 155 at the side of the lever 150 to engage the pin 152 against the tension of the spring 151. The latch 154 includes a linger-piece 156, a groove or seat 157, and spring 158 operating to hold the latch against the pin 152 as shown in Figure 4.` When it is desired to raise the lingers 141 from the position link 138 to an arm 139 j I 'of Figure '4 to the position of Figure 5, the.

finger-piece 156 of the latch 154 is `pushed rearwardly to swing about its pivot 155 until the pin 152 seats within the groove 157 at the lower end thereof when the latch will swing about the pin 152 as a fulcrum, and, through the pivotal connection-155 to the level 150, said lever will be forced rearwardl in unison -with the latch 154 to rock the sha t 32 and raise the paper-fingers 1.41 until the edge of the arm 140 strikes the pin 152 to varrest the movement. The relation of theparts is such that the spring 151 becomes operative tol hold the arm 140 indefinitely against the pin 152. To restore thel paper-finger, the two finger-pieces 156 and 153 are pinched between the fingers and simultaneously drawn .forwardly tov withdraw the seat 157 from the pin 152 by `flexing the spring 151 and rocking shaft 32 until the pin enters the normal seat 159 of the latch 154, which effectively holds the shaft 32 in the normal positions of Figure 4.

sheet B may be inserted at the rear of the platen and pushed under and around the front of the platen and aligned to the collating table 123 and 'to the typing line, when the lever 97 is depressed to the position of Figure 7 to simultaneously lower the auxiliary ribbon to the 'platen-face and lower the paper-finger into operative engagement with the worksheet to prevent displacement thereof during' the introduction of the outer sheet C which may be adjusted around the platen from the front to overlie the sheet B, andthe feedrolls 124 are now restored. The lever 97 may now be depressed to the normal operative position to lower the auxiliaryribbon X and its protective tape 126 tothe typing line nd between the two work-sheets. ,After t ing the line, both sheets may be line-space and, .through'the connections to the line-spacing mechanism, the ribbon-clamps 107 release the ribbon, the winding-up spool draws a section of ribbon along the typing line,.and, at the end of the linesspace movement, the clamps 107 are restored'into ribbon-clamping positions. This single-line entry usually finishes the typing operation for the outer worksheet. The lever 97 is raised to the position of Figure 7, the ribbon raised toaninoperative posit-ion, the feed-rolls 124 cast off, the

typed sheet removed to be replaced by another, and the operation repeated. It will be particularly noted that in'shifting the auxiliary ribbon to the inoperative position of Figure 7 during the removal or'adj ustment of the outer' sheet C, the sheet B is held stationary with the platen by the paper-fingers 141,

which are not raised until the lever 97 is lifted to the Figure 8 position for renewing the wide sheet positioned next to the platen.

lVhile the preferred form of the present invention includes means for manifolding upon a record-sheet, other forms 'of' office practice may require a third sheet, as shown in Figure 18. Here, an extra wide ledger or other vsheet A is adjusted around the platen with a carbon-sheet overlay A', as shown, to

be held in operative position upon the platen by the paperfingers 141. The sheet B may be collated over the carbon-sheet A and under the auxiliary ribbon, and a third sheet may be collated over A and B outside the auxiliary ribbon. Thus in typing a single-lineentry upon the sheet C, the characters are manifolded through the auxiliary ribbonto the sheet B and manifolded through the carbon-sheet A to .the ledger-sheet A. When the ribbon is raised to its inoperative position before the removal of the two sheets B and C, the paper-fingers 141 hold the sheet A and carbon overlay A against displacement.

Should it be required that both sheets A and B be continuous record-sheets, one manifolded by ribbon and the otherby carbon, both the sheets A and' B may be positioned edge to edge at the left hand to come under the control ofthe left-hand paper-linger of Fi ure 18, or other fingers 141. may be assem led upon the shaft 32 to engage the side edges of` the sheet B.

If the manual control of the shaft 32 and the fingers 141 by the finger-pieces 153 and 156 be employed and the connection 138 to the ribbon-shifting mechanism removed, the paper-lingers in holding the sheets A and A permit the auxiliary ribbon t'o be shifted to the position of Figure 8 when the two sheets B and C may be collated together or differentially and then clamped by the^feedrolls 124 in their relative adjusted positions, when the sheet C may be swung forwardly to clear the auxiliary ribbon in shifting to the typing line between the two work-sheets B and C.

.lli

It will be noted that the sheet A may be a very wide work-sheet requiring a twentyfour-inch platen to accommodate it. The

outer sheet C will be very much narrower,

which leaves a considerable stretch of ribbon at the right-hand side of the sheet C uncovered, and, inpreventing this wide stretch of ribbon .developing a sag through the employment of a center support for the ribbon relieves the mind of the operator of the possibility of a semi-manifolded record.

i The center support for the ribbon is shown carrier, but it will be understood that a duplicate carrier 127 may be adjusted along the rail as a center support for a long auxiliary ribbon without being used jointly as a tapesupporting member.

4 It will be noted that the spool-feeding pawls are duplicates and that both pawls are rocked by the shaft; that the spread of the pawls along the shaft 31'L is greater than the spread of the spools on the carriage; that each pawl is rendered operative or inoperative in alternation by the longitudinal shifting of the shaft 31 to bring one pawl into cooperation with a spool; that. the side arms 85, cross bar 90 and ribbon-guide plates 92 form a ribbon-carrier operable 4to control the position of the ribbon relatively to the typing line; that said ribbon-carrier is wholly suspended from the arms 83; that said carrier is given a cradling movement in approximately opposite directions, one direction up and aroundthe face of the platen and then in a forward direction away from the platen; that this cradling movement of said carrier is directed by ixed guides on the carriage cooperative with the swing movement of the arms that suspend the carrier; that the auxiliary ribbon has a `center support adjustable along the carriage; that theauxiliary ribbon is clamped at all times under tension except duringthe feeding thereof by the line-spacing mechanism; that said ribbon-clamping means are mounted upon the ribbon-carrier and remain operative to hold the ribbon under tension at all-shifted positions of said carrier; that the clamping of the ribbon takes place at the ribbon-guides to reduce the length of ribbon to be clamped to a minimum; that `the ribbon-clamping means have connections to the line-spacing mechanism that become operative to release the ribbon before the spool-feeding vpawl feeds the spool and are restored to clamping positions before said pawl releases the spool atthe initial return movement of the line-spacing mechanism; that the ribbon-feeding mechanism is operated by an intermediary 43 between the ribbon-shifting arm 83 and the line-space driven lever 34, said intermediary being operable to convey movement to the pawl to feed a ribbon-spool or operable by the shifting motion of the ribbon-carrier to sever the connection between said intermediary and the line-space actuated lever; and that the shafts 30, 31, 31 and 32 are re-enforced midway of their lengths to maintain their parallel relation with the platen, y a spacing bracket 160 secured to the rearl face of the bar 47.

Itwill be noted further that normally the extent of ribbon-feed is determined by the extent of line-spacing throw of the line-space mechanism; that shouldit be desirable for any purpose `tofeed the ribbon between the work-sheets an unlimited extent, either knob 78 may be rotated to vibratethe lever 34, rock the shaft 30 and disks 101, to vibrate the levers 113, to actuate the clamping levers 105, to release the ribbon, and while a knob 78 is thus held by onehand, the feeding spool may be manually turned in a ribbonfeeding direction and an unlimited extent of ribbon ma be drawn along the typing line; that both obs 78 may be rotated in unison by both hands, to release the ribbon and the feeding spool rotated thev same extent as by the line-space mechanism; that this manual operation may be repeated indefinitely to release and feed the ribbon between the stationary work-sheets and without actuating the line-space mechanism; that said manual rotary operation of the knobs may be accompanied by a shaft-sliding movement to jointly establish a feeding direction for the ribbon; that the cross-bar of the ribbon-carrier at the Figure 11 or typing position becomes a work-sheet deflector for the undermost or record-sheet; and that said cross-bar by its rectangular form in the Figure 7 position holds the record-sheet wrapped around the platen and under sufficient tension to permit the adjustment of the outer Work-sheet with the feed-rolls 124 thrown off and the papel'- ingers 141 not em loyed.

Variations may e resorted to Within the scope of the invention, and portions of the improvements may be used without others.

Having thus ldescribed my invention, I

claim: j

1. In a front-strike typewriting machine, the ycombination with a carriage having a platen, a ribbon-spool, and an angle guide over which the ribbon folds to travel along the platen, of means for enabling the tightening of the worn edge-portion of the ribbonwhere it extends along the platen, including means on the carriage for affording adjustment of the angle guide to tension the worn edge of the ribbon to keep the ribbon in a fiat condition, while maintaining said ribbon in an unchanged operative position aty the front of the platen. j

2. In a front-strike typewriting machine, the combination with a carriage having a platen, a ribbon-spool, a ribbon feedable by the spool, and a guide operable to deiiect the feeding path of the ribbon from vthe spool to the typing line of the platen, of means for adjustably mounting the guide upon the carrige to justify the two angular paths of the r1 at both edges of the ribbon to prevent the ribbon from curling, while maintaining said ribbon in an unchanged operative position at the front of the platen.

3. In a front-strike typewriting machine, the combination-v with a carria e having a platen, a ribbon-spool, and a rib on feedable through a vertical path to the typin line, of a guide operable to deflect the pat of the on, at will,'to maintain auniform tension lll" lllfi ribbon from the spool tothe horizontal plane of the typing line, said guide being adjust- .ably mounted upon the carriage to take Vup any slack in either edge of the ribbon caused by variations in alignment of the assembled parts, while maintaining said ribbon in an unchanged operative position at the front of'- the platen.

4. In a front-strike typewriting machine, the combination with a carriage having a platen operable to feed a pair of superposed work-sheets, and a pair of ribbon-feeding spools disposed upon the carriage with one spool at each side of the work-sheets, of av pair of ribbon-defiectors movable with the carriage, one deflector under each spool and operable to change the path of the ribbon from its Vspool to the typing line between the work-sheets. each deflector being relatively adjustable to jointly equalize the tension at tlie edges of the ribbon along the typing line to present a lat-non-curling ribbon-face be-y tween the two work-sheets, while maintain-l ing said'ribbon in an unchanged operative position at the front of the platen.

5. In a front-strike typewriting machine, the combination with a carriage having a platen operable to feed a pair of superposed work-sheets, and a ribbon-spool at each side of the Work-sheets operable to feed a ribbon in vertical paths to the typingline ofthe platen, of ribbon-guides pivotally supported upon the carriage and operable to change the direction of ribbon-feedfi'om each spool to A the typing line, each ribbon-guide including a compensating angular slot relatively shiftable to equalize any variations of tension in the two edges of the ribbon caused by wear to present a fiat, non-curling ribbon-face between the two work-sheets, while maintaining said ribbon in an unchanged operative position at the front of the-platen.

6. In a type-writing machine, the combina-\ tion with a carriage having a platen, a ribbonspool mounted at each end of the carriage, and a line-spacing mechanism operatively connected to ,line-space the platen and siinultaneously feed aaribbon-spool of a ribboncarrier operative to present the ribbon to the typing line, means normally operative,to clamp the ribbon to the carrier, and means operatively connected to the line-spacing ymechanism to release the ribbon-.clamping means during the interval of feeding a ribbon-spool.

7. In a typewriting machine, the combination with a carriage having a platen, a ribbon-spool mounted at each end of the carriage, and a line-spacing mechanism operatively connected to line-space the platen and simultaneously feed a ribbon-spool, of av ribbon-carrier operative to presentA the ribbon to the typing line, means normally operative to clamp the ribbon tothe carrier, and means connected to the line-spacing mechanism into hold-the ribbon under a rib n-feeding I' t-ension. A

8. In a typewritingmachine, the combination with a carriage having a platen, a ribbon-spool mounted at each end of the carriage, and a lline-spacing mechanism operatively connected to line-space the platen and simultaneously feed a ribbon-spool of a ribbon-carrier operative to present the ribbon to the typing line, means normally operative to clamp the ribbon to the carrier, and means operable by a continuous line-spacing movement in advancing the platen, to release and restore the ribbon-clamping means, the interval between the two latter movements being timed to a spool-feeding movement to advance the ribbon between the clamping i means.

9. In a typewriting machine, the combination with a carriage having a platen, a

s ool-fed ribbon, and a ribbon-carrier swinga ly mounted 'upon the carriage and operable to shift the ribbon to cover or uncover the typing line, of means operable to hold the ribbon under a predetermined tension at both shift positions thereof, said means including a pair of clamps operative to bind the ribbon to opposite ends of the i-ibbon-carrier.

ing a .pair of manually releasable clamps that normally are spring-pressed to bind the ribbon to opposite ends of the ribbon-carrier.

11. 4In a typewriting machine, the combination with a carriage having a platen, a spool-fed ribbon,a line-space mechanism, and 'a spool-feeding mechanism operatively connected to the line-space mechanism to feed a ribbon to the ty ing line at each line-spacing movement of t ie platen, of ribbon-clamping mechanism operative to hold the ribbon stationary under a spool-feeding tension; and means operable by the line-spacing of the lplaten to simultaneously release the clamped ribbon and rotate a spool to feed the ribbon,

sai-d ribbon-clamping mechanism including normally operative clamps and clamp-releasing members mounted upon the carriage, saidreleasing members being operatively conf fnected to a part of the ribbon-spool-feeding mechanism.-

12. In a typewriting machine, the combination with a carriage having a platen, a

spool-fed ribbon, a line-'space mechanism, and I a spool-feeding mechanism operatively con- 'nation with a carriage having a nected to th. line-space mechanis Ytq'feed a ribbon to the ty ing line at each ine-spacing movement of t e platen, of ribbon-clamping mechanism operative to hold the ribbon stationary under a spool-feeding tension, and means operable by the line-spacing of the platen to simultaneously release the clamped ribbon and rotate aspool to feed the ribbon, said ribbon-clamping mechanism including normally operative clamps and clamp-releasing members mounted upon the carriage, each clamp-releasing member having separate connect-ions that are jointly operated by the ribbon-spool-feeding mechanism..

13..In a typewriting machine, the combination with a carriage having a platen, a spool-fed ribbon, a line-space mechanism, and a spool-feeding mechanism operatively connected to the line-'space mechanism to feed 'a ribbon to the typing line at each line-spacing movement of t e p aten, of ribbon-clamping mechanism operativeto hold the ribbon stationary under a spool-feeding tension, and means operable by the line-spacing of the platen to simultaneously release the clamped ribbon and rotate a spool to feed the ribbon7 said ribbon-clamping mechanism including normally operative clamps and clamp-releasing members mounted upon the carriage, each clamp-releasing member having separate connections that are jintl ribbon-spool-feeding mec anism. y

nation with a 'ca iage having a platen, a spool-fed ribbon, a. reciprocating line-space mechanism, and a spool-feeding mechanism operatively connected tothe line-space mechanism to feed a ribbon to the typing line at each line-spacing movement of the platen, of ribbon-clamping. mechanism operative to holdthe ribbon stationary under a spoolfeeding tension, and means operable by the line-spacing of the platen to simultaneously release the clam d ribbon and rotate a spool to feed the ri bon, said ribbon-clamping mechanism includingnormally operative clamps and clamp-releasing members mounted upon the carriage, each clamp-releasing member having separate connections that arejointly operated by the ribbon-spoolfeeding mechanism, said connections including cam-disks aligned to each releasing member and secured to a shaft supported by the carriage, and rotatably connected to the reciprocating line-space mechanism.

15. In a typewriting machine, the combilaten, a spool-fed ribbon, a'reciprocating line-space mechanism and a spool-feeding mechanism operatively anismvto each line-spacing movement of the platen, o f ribbon-clamping mechanism operative to hold the ribbon `stationary under a spoolfeeding tension, and means operable by the operated by -thev connected to the line-space mecheed a ribbon to the typing line at line-spacing ofthe platen to simultaneously release the clamped ribbon and rotate va spool to feed the ribbon,said ribbon-clamping mechanism including normally operative clamps and clamp-releasing members mounted upon.

longitudinally shiftable shaft, rockable by every line-spacing movement and provided with a pair of duplicate pawls operatively spaced upon the shaft relatively to the ribbon-spools, the longitudinal shifting of said shaft being so effective that only one pawl at a time becomes operative to feed a ribbonspool.

17.y In a typewriting machine, the combination with a carriage having a platen, a spool-fed ribbon, and a line-space mechamsm, of a spool-feeding mechanism opera- 14. In a typew ting machine, the combi-I tively connected to the line-space mechanism, said spool-'feeding mechanism including a shaft rockable by ever line-spacing movementand provided wit a pair of duplicate pawls operatively spaced upon the shaft relatively to the ribbon-spools, whereby' only one pawl at a time becomes operative to feed a ribbon-spool, said rock-shaft being shiftable to automatically render either pawl `by its position operative or inoperative, and' predetermine the feeding direction of the spoolfed ribbon.

18. In a typewriting machine, the combination with a carriage having a platen, a spool-fed ribbon and a line-space mechanism, of a spool-feeding mechanism operatively connected to the line-space mechanism, said spool-feeding mechanism including a shaft rockable by every line-spacing movement and provided with a pair of duplicate pawls operatively spaced upon the shaft relatively to the ribbon-spools, whereby only one pawl at a time becomes operative to feed a ribbonspool, said rock-shaft being shiftable in the direction of its axis vto bodily shift both pawls andl render both pawls alternately operative to feed a ribbon-spool.

19. In a typewriting machine, the combination wit-h a carriage having a platen, a spool-fed ribbon and a line-space mechanism, of a spool-feeding mechanism operatively connected to the line-space mechanism, said spool-feeding mechanism including a shaft rockable i by every line-spacing movementand provided with a pair of duplicate pawls operatively spaced upon the shaft relatively to the ribbon-spools, whereby only one pawl '5 at a time becomes operative to feed a ribbon spoo l,`said rock-shaft being shiftable in the g direction of its axis to bodily shift both pawls and render both pawls alternately operative to feed a ribbon-spool, said rock o shaft' having detenting means operable in both directions of its shaft without interfering with the rockin movement of the shaft.

20. In a front-strike typewriting machine, the combination with a carriage having a platen operable to feed a pair of superposed manual means on the carriage operable to swing the carrier vertically, and a guide stationary with the carriage and 4operatively connected to the carrier to swing the ribbon from the t ping line to an inoperative typing 'g5 position la ove the typing line and close to the face of the plate 1 21. In afrontstre typewritin'g machine,

the combination -wi h a carriage having a platen operable to feed a pair o superposed no work-sheets, and a ribbon to cover the typing y line and feedable between the work-sheets,

,of a ribbon-carrier swingably suspended.

from the carriage and above the platen to present the ribbon in a vertical plane close 5 to the face of the platen at the printing line,

manual means on the carriage opera le to swing the carrier vertically and guides. stal tionary with the carriage and ,operatively connected to each side of the carrierto swing 40 the ribbon to an inoperative vertical plane above the typing line and close to the face of the platen to provide for greater clearance for the front insertion of a work-sheet.

22. In a front-strike typewriting machine,

.i5 the combination with a carriage' having a platen, a stationary ribbonspool mounted at each end of the carriage, and a swingable ribbon-carrier operative to deflect the ribbon from thespools to the typing line,fof a rock- 540 shaft supported at each end of the carriage,

arms secured to said shaft to suspend the ribbon-carrier and the ribbon close to the-typing line, means for rocking 'said shaft to raise the ribbon to uncover the typing line, and means 5; stationary with the carriage and operable through connections with said carrier, to

direct the ribbon from the typing line in an arcuate path close to tlie platen-face.

23. In a front-strike typewriting machine,

.l the combination with a carriage having a platen, a stationary ribbon-spool .mountedat each end 'of the carriage, and a swingable ribbon-carrier operative to deflect the ribbon from the vertical spools to the horizontal' 3" typing line, of a rock-shaft` supported at each end of the carriage to lie parallel with the platen, arms projecting forwardly of said shaft to support Athe ribbon-carrier and pre- 'sent the ribbon to the typing line, means for rocking said shaft to vibrate the ribbon to cover and uncover the typing line, and means bon-from the spools to the typing line, of a rock-shaft supported at each end of the carriage, arms secured to said shaft operative to support the ribbon-carrier to resent the ribbon to the typing line, means or rocking said shaft to vibrate the ribbon to cover and uncover the typing line, and means stationar with the carriage that are operable throng connections with said carrier, to define a vpath for the ribbon to and from the typing line, vsaid means including bracketsformed with slots engageable with studs on the carrier, to guide the ribbon in one direction and further including means on the brackets operable to engage cam-'faces on the carrier to further guide the ribbon in another direction. i

25. In a front-strike typewriting machine, the. combination with a carriage having a platen, va vertical ribbon-s ool at each end of the carriage, and a rib on-carrier operative to deflect a manifolding ribbonfrom the vertical spools to the horizontal typing line, of'a horizontal rock-shaft supported at each end of the carriage-,forward arms se-I cured to said shaft to pivotally suspend the ribbon-carrier to vertically present the ribbon to 'the t ping line, means for rockin said shaft to-vi ratethe carrier 'and4 permit the ribbon to cover and uncover the typing line,

rand' arcuate slots formed at each .carriage end and co-operative with studs on the carrier, to

direct the ribbon upwardlyv and rearwardly plose to the platen-face when shifted to an inoperative manifolding position. p

26. In a typewritingvmachine, the combination with a carriage having' a platen operable tofeed a pair of superposed wor sheets, a ribbon-spool-ateach end of the carriage abovethe platen, and a ribbon-car- 'rier havingguides at each end'thereof 'to 4bar, of a protective device for the ribbon in the form of al-tape to cover the ribbon and prevent .oifsettin of typed characters upon the outerwork-s eet," said .protective device.

including a carrier for each eiid'of the tape,

tective device for the ribbon in the form of a tape to cover the ribbon -and prevent ofi'- setting of typed characters upon the outer work-sheet, said protective device including a carrier for each end of the tape, each carrier including a tape-turning face to direct the end of the tape from the horizontal plane of the ribbon to a tape-clamping position between the cross-bar and the carrier, whereby both carrier and tape may be jointly clamped tothe cross-bar.

28. In a typewriting machine, the combi-l nation with a carriage having' a platen operable to feed a pair of superposed worksheets, a ribbon-spool at each end of the carriage above the platen, andva'ribbon-carrier havin guides at each end thereof to direct the ribbon. from each spool to the typing line and between the work-sheets, said ribbon-carrier including a cross-bar', of a protective device for the ribbon in the form of a tape to cover .the ribbon and prevent offsetting of typed character upon the outer work-sheet, said protective device including a4 carrier for each end of the tape,`eacn carrier including a tap-turning face to direct the end of the tape from the horizontal plane of the ribbon to a tape-clamping position between the cross-bar and the carrler,

whereby both carrier and tape may be jointly clamped to the cross-bar, one of said carriers nearestthe center of the carriage having an extension operable to hold the center of the ribbon in alignment with the protective tape.

29. In a typewriting machine, the combination with a carriage having a platen operable to feed a wide' work-sheet and a superposed narrow work-sheet, a ribbon-spool at each end ofthe carriage, and a'ribbon-carrier operative to deflect the ribbon from the spools to the typing position and betwen the two work-sheets, of a ribbon-shifting shaft supported by 'the carriage and operatively supporting theribbon-carrier, a rockshaft supported by the carriage at the rear of the platen, paper-iin ers carried by the rock-shaft and positione to hold the edges of thev wide 'work-sheet, against the platen,

andr connectionsbetween the ribbon-shifting shaft and-the paper-{ingerrock-shaft, whereby the raising of the ribbon to a sheet-removing position ffor the wide work-sheet w11l alsofraise the V"paper-fingers from the platen,

. or when the ribbonl is shiftedto an inoperative position above the typing line for the insertion or removal of a narrow Work-sheet,

the paper-fingers will reYmainin aper-hold-v releasable means mounted upon each end of the carrier and operative to hold the linelength section of the ribbon under a spoolfed non-sagging tension at all shift positions of the carrier.

31. In a typewriting machine, the combi-v nation with a carriage having a platen,- a spool-fed ribbon, and a rlbbon-carrler swingably mounted upon the carriage-ends and manually operable to shift a line-length section of the ribbon between the spools to cover and uncover the typing line of the platen, of

releasable means mounted upon each end of the carrier and yoperative to hold the linelength section of the ribbon under a spoolfed non-sagging tension at all shift positions of the carrier, and means only effective while the ribbon is covering` the typing line to release the ribbon to be fed by the ribbon-feeding spool.

32. In a `typewriting machine, the combination with a carriage having a platen, a.

spool-fed ribbon, and a ribbon-carrier swingably mounted upon the carriage-ends and manually operable to shift a line-length section of the ribbon between the spools to cover and uncover the typing line of the platen, of releasable means mounted upon eachend of the carrier and operative to hold the .line-length section of the ribbon under a spool-fed non-sagging tension at all shift positions of the carrier, and manual means operatively connected to jointly release the ribbon and feed a ribbon-spool.

33. In .a typewriting machine, the combination with a carriage having a platen, a spool-fed ribbon, and a ribbon-carrier swingably mounted upon the carriage-ends and manually operable to shift a line-length section of the ribbon between the spools to cover and uncover the typing line of the platen, of releasable means mounted upon each end of the carrier and operative to hold the linelength section of the ribbon under a spoolfed non-sagging tension at all shift positions of the carrler, and manual means operatively connected to jointly release the ribbon and `(getermine a spool-fed direction for the rib- 34. In a typewriting machine, the combination with a-,carriage having a platen, a spool-fed ribbon, and a ribbon-carrierswingably mounted upon the carriage-ends and manually operable to shift a line-length sectionV of the ribbon between the spoolsto cover and uncover the typing line of the platen, of releasable means mounted upon each end of 4 the carrier and operative to hold the linelength section of the ribbon under a spoolteil non-sagging tension at all shift positions of the carrier, and manual means operatively connected to release the ribbon and determine l a spool-fed direction for the ribbon-feed and releasable means mounted upon each end of the carrier andoperative to hold the linelength section of the ribbon under a spool-fed, non-sagging tension at all shift positions ofthe carrier, and. manual means operatively connected to release the ribbon, determine the spool-fed direction of ribbon-feed, and the extent of ribbon-feed, and then restore the ribbon-holding means during a continuous movement of said manually-operated means.

36. In a typewriting machine, the combination with a carriage having mounted thereon a platen, a line-space mechanism, a ribbon spool-fed by the line-space mechanism, and a swingable -ribbon-carrier constructed to present a line-length section of ribbon tothe typing line of the platen, of ribbon-clamping means mounted upon each side of the carrier and operative to hold a spool-fed, non-sagging tension in the line-length section of the ribbon at all positions of said carrier, and means actuated by the line-space mechanism and connectible to release the ribbon-clampmg' means only when the ribbon covers the typing line of the platen and a joint line-y spacing and ribbon-feeding operation is to be eii'ected.

37. In a typewriting machine, the combination with a carriage having a platen, a.

spool-fed ribbon, and a. ribbon-carrier swingably mounted upon the carriage and manually operable to shift a line-length of the ribbon to cover and uncover the typing line of the platen, of ribbon-clamping means on each side of the carrier operative to 'maintain a spool-fed tension throughout the line-length section of the ribbon at any shift position of the ribbon-carrier, and manually-operable means connectible at will to release the ribbon-clamping means while the ribbon covers the typing line.

39. In a typewriting machine, the combination with a carriage having a platen operable to feed a wide work-sheet and a superposed narrow work-sheet, ribbon-spools, one spool at each end of the carriage, a swingable ribbon-carrier operative to deflect the ribbon from the spools to4 the typing line of the v platen and between the two work-sheets, and manual means operable to swing the ribboncarrier to and from the tfyping line and between the work-sheets, o a rock-shaft supported by the carriage-ends, sheet-holding means adjustable alon said rock-shaft to hold the edges of the wi e.worksheet against the platen, and connections between the ribbon-carrier and said rock-shaft operable to rock said shaft and lift the sheet-holding means to release the work-sheet when the ribbon-carrier and ribbon are raised above nation with a carriage having mounted there- Y on a platen, a linespace mechanism, a ribbon spool-fed by the line-space mechanism, and

a swngable ribbon-carrier constructed 'to present aline-length section of ribbon to the typing line of the platen, of ribbon-clamping means mounted upon each side ofthe carrier and operative t`o hold a spool-fed, non-sagging tension in the line-length section of the ribbon at all positions of said carrier, mechanism actuated by the line-space mechanism and operative to release the ribbon-clamping means, while the ribbon covers the typin line, to actuate the ribbon-feeding spool, an

other mechanism 'operative when the ribbon does not cover the typing line to disconnect the ribbon-feeding spool from the line-space mechanism. l

38. In a typewriting machine, the combi-

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