US1817251A

US1817251A - Typewriting machine

Info

Publication number: US1817251A
Application number: US180202A
Authority: US
Inventors: George G Going
Original assignee: Remington Typewriter Co
Current assignee: Remington Typewriter Co
Priority date: 1927-04-01
Filing date: 1927-04-01
Publication date: 1931-08-04
Anticipated expiration: 1948-08-04

Description

Aug. 4, 1931. G/QGOING 1,817,251

TYPEWRITING MACHINE Filed April 1, 1927 3 Sheets-Sheet l WITNESS 2/ Aug. 4, 1931. G. G. GOING TYPEWRITING MACHINE Filed Apri yl 1. 1927 3 Sheets-Sheet 2 :Vlfb/A INVENTOR in ux a BY ATTORNEY WI NEESEB Aug. 4, 1931.

e. G some TYPEWRITING MACHINE Filed April 1, 1927 3 Sheets-Sheet 3 INVENTIUR WITNESSES ATTORNEY Patented Aug. 4, 193i GEORGE G. GOING, OF MIDDLETOWN, COITNECTICUT, MENTS, T0 REMINGTON TYPEWRI'IER- COMPANY, A

TYPEWRITING MACHINE Application filed April 1,

My invention relates to typewriting machines and more particularly to paper feed mechanism therefor.

The main object of my invention, generally stated, is to provide comparatively sim' ple, yet highly efficient, mechanism of the character specified, and by which certain disadvantages heretofore encountered are overcome, as will hereinafter appear.

More specifically stated the objects of the invention are as follows:

1. To provide improved means for mounting paper feed rollers so as to effect an equalization of pressure by the said feed rollers against the work sheet and effect a straight feed of the paper under varying conditions.

2. To provide means whereby a slight accidental axial displacement of the feed rollers will not result in displacing a work sheet on the platen.

3. To provide an improved construction whereby a work sheet or card may be written on at the extreme side edge portions thereof.

4. To provide improved means whereby a release of the main paper feed rollers is effective to automatically release auxiliary paper feed devices, and whereby these latter devices, or some of them, may be released at will independently of the main paper feed roller.

5. To provide improved means by which the various parts may be mounted and controlled and easily assembled.

6. To provide means by which the production of noise in certain parts of the construction is prevented.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of parts, and combinations of devices set forth in the following description and particularly pointed out in the appended claims.

In the accompanying drawings, wherein like reference characters designate corresponding parts in the different views,

Figure 1 is an enlarged, detail, fragmentary, fore-and-aft vertical sectional view of the carriage with the paper feed devices shown in the normal position, the section 1927. Serial No. 180,202.

being taken on the line 11 of Fig. 6 and looking in the direction of the arrows at said line.

Figure is a like view of the same with the paper feed devices shown released.

Figure 3 is an. enlarged, detail, fragmentary front view of the carriage.

Figure l is an enlarged, detail, front view with parts in section, of one of the paper feed roller supporting spindles and the parts carried thereby.

Figure 5 is an enlarged, detail, isometric view of one of the spacing sleeves or members.

Figure (3 an enlarged, detail, bottom plan view of a portion of the carriage; the view corresponding to a section taken on the line (l6 of Fig. l and looking in the direction of the arrows at said line.

Figure 7 is an enlarged, detail face view of the platen returning spider spring, shown detached.

Figure 8 I i one of the margin feed rollers and paper fingers, shown de ached.

Figure 9 is a detail, fragmentary, spetional view taken on tl e line 99 of Fig. 6 and looking in the direction of the arrows at said line.

I have shown my invention embodied, in the present instance, in No. (3 Remington- Noiseless machine, in which the invention may be readily incorporated without modifying, or materially modifying, the structural features of said machine as they now exist. It should be understood, however, that the invention is not restricted to embodiment in the machine referred to, but is applicable to typewriting machines generally, or wherever found available.

In the accompanying drawings, I have shown only so much of the No. 6 Remington-Noiseless machine as is necessary to illustrate my invention in its inclusion therein.

The carria 0. comprises end plates 1 with intermediate ross bars 2, 3 and 4-. The end plates are secured to a carriage bar 5 oppositely grooved at 5 to receive anti-friction bearing rollers. The carriage with the usual is a detail perspective view of support and guide in the rear thereof (not shown) is thus supported and guided for bodily vertical case shifting movement as well as for traveling movement from side to side of the machine.

A cylindrical platen 6 is mounted in the carriage for revoluble line spacing movement and also for a limited extent of axial movement, as and, for purposes which will hereinafter appear. 7 I

Beneath the platen is arranged a curved paper deflector 7 which is extended up in the rear of the platen to provide a paper table 8, the deflector terminating at its forward edge 9 below the printing line. Each end of the deflector is formed with an upstanding ear 10 located a short distance below the forward edge of the deflector. Pivoted at 11 to each ear is a link 12 that extends foreand-aft of the machine and is pivoted at its rear end on a pivot screw 13 carried by the associated end plate 1 of the carriage. Each end of the deflector is also provided with a depending ear l l bifurcated at its lower end to receive a fixed pin 15 carried by the associated end plate of the carriage. The link and pin and slot connection thus established between the deflector and the carriage act to guide the deflector in its movement towards and from effective position, as will be readily understood by a comparison of Figs. 1 and 2. The deflector is apertured at different points as indicated at 16 to receive the forward and rear main

paper feed rollers

17 and 17 respectively and permit them to bear against theplaten, or the paper thereon.

The forward main paper feed rollers 17 are mounted for independent rotative movement on a supporting spindle 18. Referring more particularly to Figs. 4 and 5 it will be seen that each rubber feed roller 17 is mounted on a metallic bearing sleeve 19 to which are riveted flanges or heads 20. Loosely supported on the spindle are two collars 21, each having a peripheral bearing groove 22 therein that receives an openmouth bearing 23 (see Fig. 2) of a pivoted hanger arm 24. Separating the feed rollers 17 are spacing members 25, one of which is shown detached in Fig. 5. Each of these spacing members is preferably made of sheet spring metal, open along one side, as indicated at 26. The diameter of the slot or opening 26 is less than that of the spindle so that each spacing sleeve is in the nature of a spring clip or clamp that may be sprung I laterally onto or off the spindle 18 without first removing the feed rollers and other parts carried thereby in order to attach or detach each spacing sleeve. When each spacing member is sprung onto the spindle, such member will firmly clamp and be held in position on the spindle, providing among other things against any rattling and resultant noises, as might be produced by loosely bar for the feed rollers mounted spacing sleeves, such as are usually employed. Each of the spacing members preferably coacts at one end with a collar 21 and at the other end with a washer 27 adjacent the associated feed roller. The end feed rollers of the set 17 and the collar 21 are held. on the spindle by two screws 28, each received at its threaded end in a tapped opening in the spindle. Each of these screws is formed with a circular flange 29 which constitutes a. shoulder that bears against the end ofthe spindle and also overlaps the head 20 on one end of the adjacent feed roller, thus limiting the outward movement of said feed roller and the companion collar 21 on the spindle. This flange 29 with the head of the screw provides an intermediate peripheral groove in which is seated aroller 30 -oft rubber or some such ma terial. Each of these rollers 30 may be sprung into place over the flange 29 or over thehead of the screw and is of smaller diameter than each of the feed rollers 17. These rol ers 30 constitute soft contact devices which in any rotative position of the spindle is in position to coactwith the bottom of the paper deflector 7 and constitute a support therefor in controlling the move-' ments of the deflector towards and away from the platen, as will be understood from a comparison of Figs. 1 and 2. This eliminates any noise that ordinarily might be produced due to the rattling of one metal part on another. r

The pair of hangers 24 for the feed rollers aremounted to turn, each independently of the other, on a pivot rod 31 supported by arms 32 of a sheet metal bracket 84 secured by screws '35 to thecarriage rail 5; A washer or head 36 (see Fig. 6) is riveted on the pivot rod 81 at one end, whereas a collar 07 is detachably conn cted to the other end of the pivot red by a set screw 38, which with the intervening parts hold the pivot rod against accidental axial displacement in the bracket arms 32. I

Intermediate the two pivoted hangers 21 is a cross bar 39 by which the hangers are connected together, but are, nevertheless, enable to receive a limited extent of pivotal movement one relatively to the other. This is due to the fact that each end of the cross bar has a trunnion-like. reduced connecting pin l0 receivedin anopening in the associated hanger that is slightly larger the diameter of the connecting pin and affords a limited relative pivotal movement between the hanger arms. A contractile re.- turning spring a1 is connected at one end to the cross bar 39 intermediate its ends, the opposite end of the spring being con nected in a like manner to a similar cross 7 of the rear set of main feed rollers 17, as will presently more clearly appear. The power'of the spring on this lever terminates in a finger piece 5 All is exerted through the connections and supporting means described for the front set of feed rollers 17 in such a manner that it will be evenly distributed on all of said feed rollers and they will be applied throughout the set or series with a uniform pressure against the platen or the paper thereon.

In order to release the feed rollers I extend each hanger arm 24 rearward beyond its pivot 31, so as to provide a lever arm l3 that overlies a rock shaft 44. This shaft is supported in bearing openings in the bracket arms 32 and at the left-hand portion thereof receives a further support in an open mouth bearing slot in the upright arm of an auxiliary bracket 45, secured by screws 46 to the carriage bar 5. One side of the rock shaft is cut away and flattened, as at 4%? at each point in the length thereof where an arm 18 on a hanger coacts therewith. This provides a cam for each hanger which enables the roller carrying end thereof to approach the platen under the force of the spring i1 to apply the feed rollers when the rock shaft 44 is turned to one position, as indicated in Fig. 2. d/ hen, however, the shaft is turned to the Fig. 2 position, the high points of the cams coact with the hangers 24 and forcethe roller carrying ends thereof away from the platen against the force of the spring 41, and enable the feed rollers .17 to move down to the releasing position, shown in said figure. hen the rock shaft is in this position the arms l8 will bear on the curved surface of the shaft towards the dead center of the shaft and the parts, including the shaft, will be held in the releasing position to which they have been shifted, but may be readily released from such position, as will hereinafter appear. One end of the shaft carries a collar de'tachably secured thereto by a screw 49. This collar with the parts associated therewith hold the release shaft 44 against accidental longitudinal displacement. I

The left-hand end of the release shaft 44: has a crank arm 50 extending therefrom. The free end of this crank arm has pivoted thereto the lower end of a link 51. The pivot which connects the crank arm and link preferably is in the nature of a shouldered screw 52 wiich has an extended head (see Fig. 6) that coacts with the left-hand the carriage. An upwardly extending arm l by which the lever may be actuated to turn the rock shaft. If desired the cross bar 3 may be utilized as a stop to limit the rear motion of the lever from normal position where the feed rollers 17 are held off. A slight forward pressure exerted on the finger piece 57 will return the parts to normal position.

The manner of mounting and releasing the rear main set of feed rollers 17, and for causing the spring ell to exert its force and apply an evenly distributed and uniform pressure by all of said feed rollers 17 against the platen, is substantially the same as that previously described in con nection with the feed rollers 17, and a detailed description thereof is deemed unnecessary. It will su'llice to designate the parts for the rear feed rollers 17 by the same reference characters as are used to designate the corresponding parts for the feed rollers 17, with the prelixing of another digit 1 for each of the parts relating to the rear set of feed rollers. Thus, the supporting spindle for the feed rollers 17 is designated as 118, whereas the corresponding spindle for the feed rollers 17 is designated as 18. Each han er for the rear set of feed rollers is do ated by the reference numeral 12 i, wherea the corresponding hangers for the front of feed rollers are designated by the reference numeral. 24:. The cross bar which connects the hangers of the front set of feed rollers is designated by the reference numeral 39, whereas the cross bar which connects the hangers 125 is designated by the reference numeral 139, and so on.

It will. be seen that the rear end of the returning spring 41 is connected to one end of a sheet metal yoke 58 which extends around the cross bar 139. The outer end of this yolte is apertured to receive freely therethrough an adjusting screw 59. Said screw is threaded into a nut 60, the opposite fiat sides of which coact with the side arms of the yoke to prevent the nut from turning. The inner end of the screw 59 bears against the cross-bar 139, so that a clockwise turning of the screw effects a rearward displacement of the yoke, thereby increasing the force of the spring exerted on both

cross-bars

39 and 139 and causing an increased but evenly distributed pressure of both sets of feed rollers 17 and 1.7 against the platen and also an evenly distributed pressure of the feed rollers of each of said sets. An anti-clockwise adjustment of the screw 59 has a reverse effect, decreasing the force exerted by the spring 41.

From what has been said it will be understood that the single spring 41 not only acts to apply both sets of

main feed rollers

17 and 17 but also, acting through the

rubber contacts

30 and 130, causes the paper deflector 7 to be shifted from the released 5:; ilied in both instances.

position, shown in' Fig. 2, to the effective position, shown in Fig. 1.

Thus far I have described only the main paper feed rollers beneath the platen, the deflector etc, and the manner of applying and releasing them, but have not described the marginal feed rollers located above the printing line, the paper fingers which carry them and the meansfor applying and releasing such devices, etc.

These last mentioned features will now be described A supporting spindle or rod 61 has a flattened face'62 provided with a scale 63 corresponding to the carriage scale, not shown The ends ofv this rod are secured by screws 64 to upright supporting

arms

65 and 66 after passing through supporting loops 61"" formed on said arms, the arms terminating in

finger pieces

65 and 66 respectively. These supporting arms are much alike, though they differ somewhat in de tail and will therefore be separately described. I The right-hand arm 66 is off-set laterally near its lower end where it is pivotally connected at67 to the lower end of a depending upright supporting link 68, pivoted at its upper end at 69. to the associated end plate 1. The arm 66 has a rearwardly projecting arm .or member 70 to which is attached one end of a contractile spring 71. The opposite end of this spring is attached to a plate 72 mounted for pivotal adjustment on a screw 73. lVhen this screw a is tightened the head thereof will bind against the plate 72 and hold it in the position to which it has been adjusted, This provides a simple means to which access may readily be had from the front of the machine for varying the force applied from the spring 71. Referring more particularly to Fig. 9 it will be seen that the force of the spring 71 not only tends to turn the arm 66 rearwardly around the pivot 67,

by which the arm is connected to the link 68, but also tends to swing the lower end of the link 68 to the rear or to resist a forward movement ofv thelower end of the link 68, for purposes which will hereinafter more clearly appear.

The arm 65 mounted and connected in the same described in connection with the arms 66, and where the parts correspond the same reference numerals are ap- However, the arm 65 is carried down beyond its pivot 67 to )rovide an extension'ia' to which is pivoted at 7 5 a rearwardly extending link 76. The rear end of the link 76 has a slot 77 and i tarough said' slotextends the pivot screw 52 to proride a pin and slot connection between the supporting arm 65 and the crankarm of feed roll release shaft n. The effect of this connection is to simultaneously move the arm 65 and the parts carried thereby, or, connected therewith, from the Fig. 1 effective position to the Fig. 2 releasing position, when the releasing lever is actuated to release the 'main feed rollers. It will be understood, however, that this pin and slot connection also enables the arm and the parts connected therewith to be moved from the 1 to the Fig. 2 position, with the aid of either f the

finger pieces

65 or 66, and while the main paper feed rollers and paper deflector remain applied. In order to insure the movement of the

arms

65 and 66 around their pivots 67 instead of around the pivots 69, when said arms are automatically shifted by the link 76'as described, I provide stop pin 78. This pin projects inward from the left-hand end plate 1 into the path of rearward movement of the associated link 68. As siiown in Fig. 1 the pin 7 8 occupies a position where it is but a short distance from its cooperating link 68 whenthe parts are normally disposed, as shown in this figur 7 Therefore, a very slight rearward movement of this link 68 will bring it into contact with the stop 78, andassure the arm 65 turning on pivot 67, whenza pullby thelink 76 on said arm is effected. This resistance by the stop 78 is also. effective on the arm 66 since the two arms are united by the spindle 61 and the arm 66 will turn on its pivot 67 rather than on the pivotal point of the connection 69 of its supporting link.

Aside from the automatic and independent control of the spindle 61 as described, the manner of mounting the spindle constitutes an important factor which will be hereinafter referred to.

The paper feed and controlling devices which are carried by and adjustable along the supporting rod 61 will now be described.

A carrier 79, (shown detached in Fig. 8) is preferably formed from sheet metal and has an integral paper finger 80 and rearwardly projecting supporting cars 81 between which is supported a margin feed roller 82 that turns on a pivot 83. It will be seen that thelaxial dimension of this roller is such that it not only extends throughout the width of the paper linger 80 but has a portion thereof that is off-set inwardly for a considerable distance beyond the inner side edge 84 of the paper linger. Theeffect of this is that the margin feed roller 82 not only coacts with a work sheet a that is fed beneath the contact face of the paper finger, but also will coact with a work sheet located inside of'the inner cage 84 of the paper finger and beyond the range of its contact face, as indicated in Fig. 3. By these means I am enabled to print at the eX- treme side margins of a card or work sheet, as is sometimes required, and which it is difficult, if not impossible, to accomplish was with. the aid of the usual margin teed devices. a

"The carrier 79 is also formed with integral barrel-like bearing members 85 that are united preferably at their free ends by a cross bar 86 that may bebent inward towards supporting rod 61. This cross bar 86 bears against the rod and acts thereon. as a spring detent to hold the carrier 7 9 and-the parts; carried thereby in the positions to which they may be adjusted along the rod, it being understood that the sheet metal from which the carrier 79 is made is sufiiciently resilient for this purpose.

It will be understood that ordinarily there are two of these mar inal paper controlling devices employed, one to coactwith each side margin of the work sheet and that they are both constructed in a like manner except that they are reversed,

Referring more particularly to Fig. 1, it will be seen that each margin feed roller is located-on one side of the axial center of the rod 61, or the center on which each carrier 9 turns, whereas the paper linger 80 is located on the other side 01 said center. By reason of this fact the force of each spring 71 is exerted to press with equal force againstthe platen the companion margin feed roller and its companion paper finger, and one will not receive a pressure in excess of the other. It also will be observed that in order to maintain a paper finger temporarily away from the platen it is merely necessary to turn the paper finger forward andup until thecompanion margin feed roller 82 has been shifted to or beyond the position where he roller is dead centered against the axis of the platen, the position of such dead center being indicated by a dot-and-dash line b in Fig. 1. \Vhen thus shifted the paper finger will be held away from the platen. A mere turning of the paper finger in the opposite-direction to the position shown in Fig. 1 again restores it with spring pressure against the platen.

The means hereinbefore described for mounting the supporting rod 61 provide for pressing both of the paper margin feed devices carried thereby against the platen, or the paper thereon, with equal or substantially equal pressure from the springs 71. This is due to the fact that themeans for supporting and applying pressure to the supporting spindle or rod 61 constitutes a self-righting or self-finding mechanism by which the rod 61 may move to and from the platen in parallelism therewith, or may receive a limited canting movement out of parallelism with the platen and the axis thereof. It, for example, a pack of work sheets is employed, ivh'ch is materially thicker at one end of the platen than at the other, this ordinarily might result inshitting the margin feed device near one end of the platen, where the pack is thinnest, entirely out of contact with the pack while the margin feed device at the other end of the platen would press against the thick portion of the pack, and a crooked and imperfect feed would follow. This would result if the rod 61 necessarily always moved in parallelism with the platen but it does not result in the present construction where the rod 61 may in such circumstances assume a limited canted position out of par allelism with the axis of the platen. In such position both margin feed rollers and paper fingers would press with a substantially equal pressure against the pack and a straight feed thereof would result. At this time one of the supporting links (58 may automatically turn forward a slightdistance around its pivot (39, thereby carrying the

arm

65 or 66 carried by such link slightly forward to compensate for the increased distance the companion margin feed roller 82 and finger has been moved forward beyond the other roller 82 and its finger. Since the two

arms

65 and 66 are fixedly connected at their upper ends to the intervening rod (31, the rod has only a limited cant-ing movement; nevertheless, it is sufiicient tor the attainment of the purpose stated and has proved in practice to be highly eilicient. It will be understood that by this construction each of the springs 71 exerts its individual force more or less independently on the supporting means at one end of the rod 61, and consequently on the feed devices carried near the corresponding end of said rod. Nevertheless, there is substantially a balancing or equalization of the pressure exerted by the margin devices against the platen from the action of both of said springs 71 to provide a straight and uniform feed.

From a comparison of Figs. 1 and 2, it will be understood that a rearward shifting of the release lever 55 from the Fig. 1 position is effective to simultaneously move the

main feed rollers

17 and 17, the paper deflector 7 the margin feed rollers 82 and the paper fingers 80 away from the platen to the positions indicated in Fig. 2. lVhen said release lever is returned to the normal Fig. 1 position the spring ll and the springs 71 are effective to return said parts to opera tive positions, shown in Fig. 1.

In manufacturing typewriting machines, it is diflicult to provide paper feed rollers, such as the

main feed rollers

17 and 17, which are mounted to rotate freely and which, nevertheless, will not have some slight axial displacement or play. Ordinarily, where the feed rol ers have any axial play there is a tendency when this occurs to carry a work sheet laterally with such rollers, moving the sheet relatively to and lengthwise of the platen. This defect is more pronounced when manifolding, there th right to'begin a new line and is suddenly arrested by the-margin stops; The inertia of the feed-rollers at this time tends to displace the feed rollers axially tothe right and carry a work sheet with them relatively to the arrested platen, thereby producing imperfect marginal alignment of the imprints, and possibly other improper letter spacing at times.

- One of the objects of the present invention is to overcome this difiiculty, not by preventing such accidental axial displacement of the feed rollersbut by preventing such displacement from having the ill effects pointed out above. To this endl mount the platen 6 in the carriage so that the platen mayreceive a limited axial movement or displacement in the carriage coextensive with axial displacement of the feed rollers,

so that the two may at this time move together and the work sheet will not be shifted or displaced. This" construction will now be described.

Referring more particularly to Fig. 3 it will be understood that the left hand hub 87 of the'platen 6 extends through a bearing opening in theleft-hand end plate 1 of the carriage, so as to support the platen and permit a slight axialmovement'of the hub in its bearing opening. Connected to the hub 87 of the platen through a clutch,'(not shown) is a line spacing wheel 88 controlled by a line spacing pawl 89. A spiderspring, designated as a whole by the reference numeral 90 and which is shown in detailin Fig. 7, has a central bearing'opening 91 through which the hub 87 extends to provide a support for the spring. The circular body portion 92 of the spring bears against the associated end plate 1 of the carriage, whereas the radiating arms 93 of the spring bear at their ends against the line spacing wheel 88. The force of the spring 90 is thus exerted to shift the platen axially to the limit of its movement in the carriage to the left. i

At the right-hand end the platen is mounted and controlled in the followingmanner: -The platen shaft or supporting spindle 94 is fixed to the right-hand platen hub 95 by a pin 96. This shaft 94 receives a bearing ina collar or bushing 97 having av flange 98 adapted to bear against the outer face of the associated end plate of the carriage. From an inspection of Fig. 9 it will be seen that this bushing 97 receives a hearing in an open ended'key-hole slot which when the sleeve is shifted axially outward from said bearing enables the platen shaft 94 with the bushing thereon to be displaced from the bearing 99 in the end plate. In order to revent the bushing 97 from turning in its iearing a locking lug 100 (see Fig. 3) on the bushing is received in a corresponding locking notch 101 in the associated end plate 1. The outer right-hand end of the shaft 94 is threaded at 102 for cooperation with the threads in the hub 103 of the finger wheel 104. The inner end of the hub 103 bears against the bushing 97 and holds it in place in its hearing, at the'same time providing an' abutment for the hub so that a rotative adjustment thereof by its finger wheel will result in controlling the normal axial position of the platen in the carriage. Thus, a clockwise adjustment of the finger wheel 104 results in pulling the shaft 94 and the platen connected therewith. to the right in the carriage against the force of the spring 90 Ontheother hand, an anticlockwise adjustment of the finger wheel enables the spring 90'to shift the platen to the left in its bearings. The purpose of this adjustmentis to regulate the extent of axial play or movement the platen may receive in the carriage so that such play may be made to accord, or be substantially coextensive, with that of the feed rollers 17 and 17 r I provide suitable means in order that the finger wheel 104 may be held firmly in any position to which it may beadjusted on the shaft 94, and in order to firmly connect the shaft'and finger wheel to turn. togetherso that the finger wheel may be employed to turn the platen. I preferto employ for this purpose the very simple means herein shown, which consists of a set screw 105'received'in the outer end of the tapped opening in the hub 103 of the finger wheel. With the screw 105 backed up the finger wheel may be turned on the shaft 94 in the desired direction. Vhen the proper adjustment has been attained the screw 105 is threaded in until its inner end bears firmly against the outer end of the shaft 94. The screw 105 thus acts as a lock which will prevent any relative rotation between'the finger wheel and shaft until the screw is again backed up and freed from the shaft. r

It will be observed that the action of the spring tends to draw the platen to the left and hold it at the limit of its movement in the carriage in this direction. This is because, as hereinbeforepointed out, the ob jectionable axial displacement of the feed rollers usually occurs when the carriage 1S violently returned to the right. Ifin the present construction the force of the return movement issufiicient to displace the feed rollers axially on their'bearings to the right, such force also will be sufficient to overcome the resistance of the spring90 and permit the platen to shift axially in its bearings to the right an extent substantiallv equal the axial shift of the feed roller he e tore, the feed rollers and platen will shift together and there will be no axial shift of one relatively to the other which tends to displace the paper relatively to the plalen. After the shock of arresting the violently returned carriage, the spring 90 wi l return the platen axially to the left and the feed rollers will return with the platen, so that Whenever the feed rollers riove axially, whether to the right or left, the platen will move with them, and there will be no displacement or the work sheet relatively to the laten.

vention, should be understood construction shown represents but one form in which the invention may be embodied, and that various changes may be mane,

and some of the features may be employed without others, without departing from my invention as it is defined in the accompanying claims.

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

1. The combination of a platen, a spindle, paper teed devices cooperative with the platen and carried by and adjustable along said spindle, supporting arms to which the ends of said spindle are connected, and links mounted for relative pivotal movement and by which said armsare supported and on which they are pivoted, whereby said spindle may automatically move into and out of parallelism with the axis of the platen and a self-righting of the paper teed devices in exerting pressure against the platen is provided.

2. The combination of a platen, a spindle, paper feed devices cooperative with the platen and carried by and adjustable along said spindle, supporting arms to which the ends of said spindle are connected, links mounted for relative pivotal movement and by which said arms are supported and on which they are pivoted to turn freely, and two springs each exerting its individual force on one of said supporting arms to thereby apply the feed rollers to the platen with a spring pressure, whereby said spindle may automatically move into and out of parallelism with the axis of the platen and a self-righting of the paper teed devices in exerting pressure against the platen is provided.

3. The combination of a platen, a spindle located above the printing line, paper teed devices carried by said spindle, upright supporting arms each connected at its upper end to one end of said spindle, upright supporting links mounted for relative pivotal movement and each of which turns at its upper end on a fixed pivot and is pivoted at its lower end to the lower end of one of said supporting arms, and two springs each connected to one of said supporting arms and exerting its individual force thereon to thereby apply the feed rollers to the platen with a spring pressure, whereby said spindle may automatically move into and out of parallelism with the axis of the platen and a sell-righting of the paper feed devices in exerting pressure against the platen is provided.

4-. The combination of a platen, a spindle, paper feed devices carried thereby, supporting arms to which said spindle is rigidly attached, links mounted for relative pivotal movement and on which said arms are pivoted, and a separate spring connected to each arm, each spring exerting its force to turn the associated arm around its pivotal connection with the companion link and also exerting its force go return the companion link around its pivot and thereby apply the feed rollers to the platen with a spring pressure, whereby said spindle may automatically move into and out of parallelisn'i with the axis of the platen and a se righting of the paper teed devices in c: ng pressure against the platen is provided.

5. The combination of a platen, a spindle, paper teed devices cooperative with the platen and carried by and adjustable along said spindle, supporting arms to which the ends of said spindle are connected, links mounted for relative pivotal movement and by which said arms are supported and on which they are pivoted, whereby said spindle may automatically move into and out of parallelism with the axis of the platen and a self-righting of the paper leed devices in exerting pressure against the platen is provided, main paper feed rollers, releasing means therefor, and intermediate actuating connections between. said releasing means and said spindle which causes a releasing movement of the spindle to be effected when the main paper feed rollers are released and which enable said spindle to be moved to releasing position independently of the main paper feed rollers and while the latter remain applied.

6. The combination of a platen, a spindle, paper feed devices cooperative with the platen and-carried by and ad ustable along said spindle, supporting arms to which the ends of said spindle are connected, links mounted for relative pivotal movcmentand by which said arms are supported and on which they are pivoted, whereby said sp1ndle may automatically move into and out of parallelism with he axis of theplaten and a self-righting of the paper teed dev ces in exerting iressure against the platen s provided, main paper ."feed rollers, releasing means therefor, and an actuating link between saidreleasing means and one of said supporting arms, said actuating link being connected to said supporting arm by a pin and a slot connection which enables the spindle to be moved to releasing position independently of said releasing means.

7 The combination of a platen, a spindle located above the printing line, paper feed devices carried by said spindle, upri ht supporting arms each connected at i s upper end to one end of said spindle, upright rela; tively movable supporting lin {5 each or which turns at its upper end on a fixed pivot and ispivoted at its lower end to the lower end of one of said supporting arms, two springs each connected to oneofsaid supporing arms and exerting its 1nd1v1dual force thereon, whereby said spindle may automatically move into and out of parallelism with the axis of the platenanda self-righting of the paper feed dev ces in exerting pressure against the platen is provided, main paper feed rollers, releas ng means therefor, and intermediate actuating connections between said releasing means and onegof said supporting arms which causes areleasing movement of the spindle to be effected when the main paper feed rollers are released and which enable said spindle to be movedito releasing position independently-of the main paper feed rollers and while the latter'remain applied.

8. The combination of a platen, a spindle, paper feed devices carried thereby, support- 2 separate spring connected to each arm, each spring exerting its force to turn the associated arm around its pivotal connection with the companion link and also exerting its force to return the companion link around its pivot, whereby said spindle may automatically move into and out of parallelism with the axis of the platen. and a self-righting of the paper feed devices in vided, main paper feed rollers, releasing means therefor, and an actuating linlr between said releasing means and one of said supporting arms.

9. The combination of a platen, a arranged above the printing line, margin paper controlling devices carried by and justable along said spindle, means for supporting said'spindle to automatically move into and out of parallelism with the axis of the platen so as to provide a self-rightof the said paper controlling devices in exerting the pressure thereof against the platen, paper controlling means including a paper deflector, releasing means by which the paper deflector is moved towards and away from the platen, and operative connections between said releasing means and said spindlewhereby margin paper controllingdevices will be 'moved away from the platen when the deflector is released.

10. The combination of a platen, a spinspindle dle, margin paper feed devices cooperative with the plat-en and carried by and adjustable alon said S3111ll su" )ortm arms to k b i z which, the ends 01 said spindle are conected, relatively movable links by which arms are supported and on which they are pivoted, whereby said spindle may automatically move into and out of parallelism with the axis of the platen and a sel righting of the paper feed devices in exermg pressure against the platen is provided, nain paper feed rollers, a paper deflector, releasing means for simultaneously releasing said feed rollers and deflector, and operative connections between said releasing means and spindle for releasing the margin paper feed devices when said feed rollers and deflector are released.

11. The combination of a carriage, a platen having a slightextent of axial play in the carriage when the carriage is ar rested during a comparatively violent return to the right, adjustablemeans for'variably determining the extent of such axial play, and a spring which tendsto move the platen axially to the left and take up the play thereof in the carriage and to hold the platen in or restore it to .a' given relation axially with reference to the carriage, the effective force of said spring being such as to enable the axial play of the platen to be effected under the conditions specified.

12. The combination of a carriage, a platen carried thereby, paper feed rollers coacting with the platen and having a slight extent of axial movementrelative to their support, and means for affording a slight extent of axial movement of the platen in the carriage with said rollers, so that the axial play of the feed rollers may be in unison with the platen and not independent thereof.

exerting pressure against the platen is pro- 13. The combination of a carriage, a

platen carried thereby, paper feed rollers coacting with the platen and having a slight extent of axial movement relative to their support, means for afiording a slight extent of axial movement of the platen in the carriage brought about by a comparatively violent return of the carriage, so that the axial play of the feed rollers may be in unison with the platen and not independent thereof, and a spring which tends to oppose such axial play of the platen and to hold the platen in or restore it to a given relation axially with reference to the carriage, the effective force of said spring being such as to enable the axial play of the platen to be effected under the conditions specified.

14:. The combination of a carriage, a platen carried thereby, paper feed rollers coacting with the platen and having a slight extent of axial movement, means for affording a slight extent of axial movement of the platen in the carriage with said feed rollers, adjustable means for variably determining the extent of such axial movement of the platen so that it may accord substantially with the extent of axial movement or play of the feed rollers, and a spring which tends to move the platen to the left in its axial movement in the carriage, and to hold the platen in or restore it to a given relation axially with reference to the carriage, the effective force of said spring being such as to enable the axial play of the platen to be effected under the conditions specified.

15. The combination of a carriage; a platen carried thereby; paper feed rollers coacting with the platen and having a slight extent of axial movement; means for affording a slight extent of axial movement of the platen in the carriage; adjustable means for variably (:letermining the extent of such axial movement of the platen so that it may accord substantially with the extent of axial movement or end play of the feed rollers; and a spring which tends to move the platen to the left in its axial movement in the carriage and to hold the platen in or restore it to a given relation axially with reference to the carriage, said adjustable means comprising a finger wheel for the platen, a threaded connection between said finger wheel and platen and by which the platen may be moved axially against the force of said spring, and releasable means for looking said finger wheel at any desired point of adjustment on its threaded connection.

16. The combination of a platen, a set of front main paper feed rollers, independently movable hangers by which said feed rollers are supported, a cross bar which connects said hangers so that a limited extent of relative movement between them may be effected and thus enable an evenly applied pressure to be exerted by said feed rollers against the platen, a second set of rear main paper feed rollers mounted and connected in the same manner as said front set of feed rollers, and a single spring connected to the cross bars of the two sets of feed rollers intermediate the ends of said bars and exerting an evenly distributed force on the feed rollers of the two sets as well as an evenly distributed force on the feed rollers of each set.

17 The combination of a platen, a set of front main paper feed rollers, independently movable hangers by which said feed rollers are supported, a cross bar which connects said hangers so that a limited extent of relative movement between them may be effected and thus enable an evenly applied pressure to be exerted by said feed rollers against the platen, a second set of rear main paper feed rollers mounted and connected in the same manner as said front set of feed rollers, a single spring connected to the cross bars of the two sets of feed rollers intermediate the ends of said bars and exerting an evenly distributed force on the feed rollers of the two sets as well as an evenly distributed force on the feed rollers of each set, and hand-controlled feed roller releasing-means coacting directly with the independently movable hangers of both sets of feed rollers to move them away from the platen.

Signed at Middletown, in the county of Middlesex and State of Connecticut, this 29th day of March A. D. 1927.

GEORGE G. GOING.