US1055367A - Type-writing machine. - Google Patents

Description

V11. C. STICKNBY. TYPE WRITING MACHINE. APPLICATION FILED DBO. 3, 1908.

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B'. CfSTICKN'EY.' TYPE WRITING MAGHINE. 'APPLIOATIQN FILED 111:0.-3, 190e.

Patented 1111111111913.

2 SHEETS-'SHEET 2.V

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UNITED sra'lrns PATENT ormoni.

BURNHAM C.'STICKNEY, 0F ELIZABETH, NEW JERSEY, ASSIGNOR T0 UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y.7 A. CORPORATION OF DELAWARE.

TYPE-WRITINGMACHINE.

Specification of Letters Patent.

Patented Mar. 1 1 191 3.

Application filed December 3, 1908. Serial No. 465,784.

To all wlw/ni 'it may concern Be it known. that l, Bruni-1an C. STICK- Nnv. a citizen of the United States. residing in lllizabetluin the County of Union and State of New Jersey. have invented Certain new and useful Improvements in Typellvriting Machines, ot'whieh the following is a speeiieation.

This invention relates to the paper feeding pressure rolls that run upon the cylindrical platen or main feed rolls of typewritingmaehiues.

' The invention relates more partieularly to machines in which several rolls are arranged end to end along the platen, and more particularly to those in which there are two tandem series of such rolls.

ltis customary to place two or more rolls upon a single spring-pressed shaft which runs along the platen, but thisI is not found to be altogether satisfactory. heeause any movement of one roll away from the platen atl'eets the other rolls on the same shaft. and tends to interfere with the true feeling of the sheet or sheets around the platen. Moreover where ther are two of sut-h shafts, eaeh shaft being provided with two or more springs. frequent. adjustment ot' one or more of the springs is Jt'ouud neeessarv in order to maintain an evenuess of pressure ou the rolls for the entire length of the platen.

One of the principal ob'ieets ot my invention is to avoid these objeetious. and to euable any one et' a .series of small rolls to be moved away from the platen without atfeeting the main rolls` and at thtl .saine tiuu` to l avoid the neeessity of etl'eet'ing the relative :nljustmeut of a plurality of springs pressing said rolls against the platen.

A further ohjeet is to provide in such a structure for the ranting or showing of any roll away from theI platen at one end while leaving the other end running upon -the platen and without atl'eeting the remaining rolls.

'Ihe invention 'may be applied either to a single line ot' rolls extending along the platen, or to a tandem series of sueh lines of rolls.: and in either case, I connect a single spring to a series of rolls, which are placed end to end, the connection of the spring to said rolls being such that either roll may be lifted away from the platen without atl'eeting the function of said spring to press the other roll or rolls against the the pressure of a single spring is divided.

among two rolls one lying tandem to the other. that is. plaeed at a different point; around the periphery of the platen. lVhere, t'or instance. a single spring is made to cause eat-h ot' eight rolls to press independently against the platen a substantial advantage is gained. because the necessity is avrided of adjusting eat-h of the many springs relatively to the others. this being, however. only one ot' the advantages gained.

Other 'tentures and advantages will hereinafter appear.

Vln the aeeonmanying drawings. Figure l is a perspective bottom view of the platen 'trame o t' an lhnlerwood iront strike writing maehiue. having applied thereto a system of eight'pressure rolls embodving the invention iu ene form: the rolls being shown as running upon the platen. Fig. Q is a front elevation of the -same. Fig. 3 is a sectional end elevation showing the arrangement of the rolls and roll-supporting arms. Fig. 4.- is a view similar to Fig. il. but' showing the rollsl released from the platen. Fig. o is a perspective view o't` a roll unity Comprising two tandem rolls. and interpivoted arms on which the rolls are mounted. Fig. G is a diagram to illustrate the toggle aetion, whereby the rolls are nwehanirally held in the released l `ig..l position. Fig. Tis a view similar to Fig. I .Yhut' showing six feed rolls.

land a moditied method ot' mounting and pressing the saine against the platen. Fig. S is a t'ront view ot' the Fig. T structure. Fig. t) is a diagram to show how the pressure of a single spring may he equally apportioned among six rolls extending in line along a platen. sueh a spring may be divided among tive rolls. Fig. l1 shows the spring-pressure divided among eight rolls arranged iu a line.`

Fig. l2 is a diagram otl the manner of com- Fig, l() shows how the pressure of pounding pressure rolls for three rolls em- Rolls 7, 8, 9 and 10 forming a line of series extending along the platen are hung by means of axles 11 in pairs of arms l2 pivoted upon a. fixed rod 13, which rigidly connects the ends 4, 5 of the latenframe; said arms extending forward y from said rod to said rolls. Each arm is loosely connectedv to its axle 11, to permit skewing or tilting of either end ofthe roll away from the platen while the other end runs thereon; or in other words, either arm 12 of the roll 7 for instance, may rock downwardly about the rod 13..,while the other arm 12 does not so rock. This permits either end of any roll 7, 8, 9 c1110 to ride up over the side edge of any sheet or number of sheets passed through the machine, which is an advantage, and also insures that both ends of the roll shall run with full pressure upon the platen7 regardless of any slight imperfection in the cylindrical form of the latter,

i' due to slight fault in manufacture or to age and use of the platen itself. As will hereinafter appear, each roll is made to do its full duty for its entire length under all circumstances, and regardless of what the other rolls are doing or not doing, so that true feeding of paper or other material to be fed around the platen is assured. As many collars 14 as necessary, secured upon the rod 13, may be employed to space the pairs of arms 12; and, if desired,sleeves 15 may surround the rod 13 between the arms 12 of each pair to hold them properly separated.

Thearms 12' are formed with extensions 16 directed backwardly from the pivot-rod 13;and upon said extensions 16 are pivoted l at 17, arms 18 carrying rear rolls 19-by i ends u on the pivot 17; and the yforward means of axles or pivot screws 20. The arms 18 of the rear rolls are hung between their ends, o these arms are connectedin each instance by abar 21,.which extends lengthwise of the rolls,-fand at its middle is connected by a pivot or lscrew-22 to means for causing the rol- ls 7,19, to press against the platen.

It will be seen that downward pressure lapplied to the pivot or bearing point 22 will be. equally divided between the Jforward ends of the armslS .to turn said arms about the pairfof-pivots 17th cause the rolls 19 to press upagainstthe platen; and that the second downward pressure upon the pivot 17 will cause the arms 12 to turn upon the main pivot rod 1311i a direction to causethe front vroll 7 to pil-ses against the platenf Both of the pivots 17, 2'0-are suiciently loose to platen, and without at all disturbing the other roll.- The leverage may be so proportioned vbetween the arms 12 and 18 as 4to cause the forward and rear rolls to bear equally upon the platen. It will be seen .that

these devices comprise a unit in which the' arms of one pair are hinged directly upon a fixed part of the platen frame, while the arms of the other roll are pivoted upon the first arms to form a compound levegage sys' tem to enable pressure applied at asingle point in the unit to be distributed between the two rolls in 'a manner to permit either roll independently of the other to be either swung bodily away from the platen vor lift ed at either end away from the platen while t-he other end runs thereon.

Taking up now theadjacent rolls 8, 23, it will be seen that these vrolls with their arms 12, 18 form. a second unit to which the pres-` sure may be applied at pivot 24 with the results already noted with regard to the application of pressure to pivot 22. it will also be seen that these pivots 22, 24 are loosely connected by a lever 25 which may be termed an equalizing lever. It may, for convenience, be pivoted upon the screw 22, and connected by an open slot 26 to the screw 24. Midway between its ends, this equalizing lever 25 is provided with a pivot 1200 27, whereby the lever may be pulled dprrmwardly with the effect of dividing thefforce equally between pivots 22 and 24 with the result thatthe pressure applied at 27 is distributed with substantial uniformity among 105 the four rolls 7, 19, 8 and 23; and it will also f be perceived that any roll of the four may be either lifted bodily or skewed away from the platen without adecting the remaining.

three in the group, or lessening the pressure upon any of them; and the same is true of any two or three rolls in the group. At the other end of the platen, the rolls 9, 28 form a third unit, and the rolls 10, 29 :form a fourth unit, the rolls in each. unit connecte ed in the manner already described, and the units connected by an equalizi'ng lever or bar 30 pivoted to one unit at 31 and to the other unit at 32, and having midway betweenits ends a pivot 33 to which the power 120 u is to be applied. f

' A master equalizing bar or lever 34; is pivoted' at its ends upon the pivots 27, 33, and midway at` its ends is cpnnected by aslot 35 to a screw or studg36 upon abllf 125,

crank 37 the pendent arm V38 o-which is attached one end .of coiledl clraw-spring 39; said spring extendingbeneath and along thefniaink fixed rod 13 and oaugh'tat its other end 'upon a fixture 40 fixed11p r`rtl1f gq i platen frame, said xture having notches 41,

12, to permit the tension of the spring to be regulated as more or less pressure is rev quired for the system of pressure rolls. lt

pressure upon the main equalizing bar 34,'- -andthat such downward pressure, which 1t will be seen is applied at only one point 3G m the entire roll pressure mechamsm, is

distributed with lsubstantial equality between the minor equalizing bars 25 and 30, and hence with substantial uniformity among all of the eight rolls in the system. permitting any one or more rolls to be either lifted bodily or skewed away from the platen independently of the remaining'rolls, and without affecting the latter or disturbing their functions. The l ellcrank 87, 38 is hinged at 43 upon a bl., fli4l fixed upon the rod 13. From the latter also depends` av Xed arm 45 carrying the usual roll lo to run upon the usual shift rail ol said lfndei-wood machine. When, for instance, roll 19 is pulled down fro-m the platen, as by the introduction of a narrow sheet or wad of paper, its arms 18 are swung about the pivot or hinge screws .17, without how-` ever moving the arms 12 which carry said screws, since the downward pressure upon 19 tends to maintain the roll 7 against the platen. The forward ends of the arms or levers 18 swing upwardly'together with their equalizing bar 2l, and hence the equalizing bar 25 is tilted down at this end, the pivot screw 2st at the other end of said bar 25 remaining umlistmbed since the down' ward movement at 22 tends to maintain 2li in place.4 The downward swinging of the left hand end of the lever 25 causes a slight n'iovement of the master equalizing bar 3l, the right hand end of which remains stationary, since a dowmvard movement at one end of said bartends to hold up the other end of said bar. The extent. of movement at the middle of the bar 34 is about half that of the pin 2T, and hence the bell-crank 37, 38 is vibrated slightly, and the spring 39 is slightly tensioned: but it will be seen that this is the only result ofthe movement of the roll 19 away from the platen.' Owing 'to the length of the spring, its tension may remain substantially unchanged even when 'extended to the slight degree jus't indicated. -ln like manne-i :of: one or more of the rolls may be practically forced away from the platen with corresponding results. Thus it `.vill be seen that no mat-ter'what duty is placed upon any roll of the system, the remainingA rolls are vstill enabled to per- '.corm independentlyv their full functions.

. To release the rolls, a' key 47 is depressed, sai'l key having a rock-shaft 48 hung upon the platen framefjfrom' whichextends an arm 49, the latter Vconnected by a link o() to an arm 51 fixed upon a rock shaft journaled in a block 513 fixed upon the rod 13. Upon the same rock shaft is a pendent arm 511 connected by a link 55 to bell-crank arm 38, the pivot of the link to the bellcrank bein0r indicated at 56. `When the key 47 is depressed, the link5() is lifted, and the arm 5t swung up to the Fig. (i position, or to the position seen at dotted lines in Fig. 2; the link 55 forming with the arm 51 a reversed toggle, tolock the parts in the roll-releasing position, by reason of the arm 54 swinging up past the dead center position, as shown. A bar 57, Figl, may extend along beneath the arms 18 to prevent the rolls 19 from falling too far and overbalancing the lroll 7, thus leaving the latter free to fall away from the platen.

lReferring now to Figs. 7, 8 and 12, only three units are shown, and the method ot' carrying out the invention is somewhat varied from that just described. Front roll 58 is carried loosely upon a pair of arms 59 hinged upon the rod 13, and rear roll G0 is carried upon a pair of arms (il also directly hinged upon said rod 13. The rolls 62, 63 are similarly mounted to form a second pair; and rolls 64, G5 are 4likewise mounted to form a third pair. In this form of the invention, the roll-supporting arms 59, G1 "are not compounded as at. Fig. 1, nor are they directly connected. The arms 59 carrying the roll Gil are connected by an individual equalizing bar GG. The corresponding arms carrying the roll 62 are connected by an equalizing bar G7. All equalizing bars are of course loosely connected at their ends to the arms. Said bars 6G and 67 are connected by an equalizing bar 68, the same being pivoted at G9 to (S7, and at 70 to 6G. The arms 59 of roll 58 are connected by a short equalizing bar 71. Pivoted at72, midway of the ends of the latter. is a long distributing bar 73, the other end of which is pivoted at 74 to the bar 68 midway between the ends of thc latter. Pivoted at- 75 to the bar 73 at. a point; one third the distance between 74 and 72 (or directly under the pivoty (39) is one arm 76 of a bell crank, a pendent arm 77 of the latter being connected to a spring 78 to press the rolls 58, 62 and 64 uniformly against the platen 2. The bell-crank 76,77 is suitably pivoted upon a collar or block 79 secured upon the rod 13. The rolls (35, 63 and 60 are provided with a similar compounded pressure distributing system including individual equalizing bars 80, a long equalizing bar 81 for the rolls 63 and G5 (corresponding to 68) and a still longer equalizing bar 82 (corresponding with 73) this bar being pvoted at 83 to a pendent arm 84 of a bell-crank, the latter comprisinga pendent arm 85 connected to the other end of the draw-spring 78 so that the llatter presses both the series 58, 62 and 64, and the series 60, 63, 65 against the platen; any roll or rolls of the six being movable away from the platen in'the manner and with the results already referred to with relation to the rolls at Fig. '1. The bell-crank 84, 85 is hinged upon a collar or block 86 similar to 79. The paper shelf 6in each case is extended around under the platen to form a paper, guide 87; suitable holes 88 being "left for the rolls to protrude through. It Will be seen at Fig. 7 thateither the rolls 58, 62, 64, or the rolls 60, 63, 65 may be omitted, and that the spring 78 will act uponvthe remaining .rol.ls vvith the shafts already described; the pressure of a single springbeing divided up equally among a series of rolls extendingalong the platen.

Referring to Fig. 9, these rolls are shown extending along the platen; a spring such as 89 being connected to a bell crank 90 attached to a main equalizing lever 91; the latter connected at its right hand end to the middle of a sub-lever 92, and at its left hand end to the middle of a lever 93, which at its ends is co-nnected to sub-levers 94 and 95; sub-lever 92 corresponding to 68 at Fig. 8, and being similarly connected to a pair of rolls 96, 97; sub-levers 95 being similarly connected to a. pair of rolls 98;

` and sub-lever 94 to a pair of rolls 99. It

Will be understood, at Fig. 7 that on one side ofthe rod 13 rolls 58, 62 and 64 may be employed, and'at the other side rolls 96, 97, 98, 99; or instead of three rolls on one side and six on the other of said rod 13, there may be employed two series of any disimilar numbers of rolls, as two and four, three and ten, four and live, etc., with the rolls breaking oints, desired; that is, with each roll in one series opposite a space with the adjoining rolls in 'the other series.

At Fig. 10, five rolls 100, 101, 102, 103 and 104 are shown ina line along the platen 2; 103 andA 104 being connected by a sublever 105; 101 and 102 by a sub-lever 106; while aA lever 107 is connected to roll 100 and sub-lever 106; and the main lever 108 connecting the middle 107 to the middle 105, and itself connected at .a point one-third of the way bet-Ween its ends to a bell-crank 109- havin'g a spring 89.

At Fig. 11, pairs of rolls 110, 111, 112, 113, are connected respectively by sub-levers 114, 115, 116 and 117..4 Sub-levers 114 and 11,5 are connected by a longer lever 118; While the levers 116 and 117 are connected'by a ".longer lever1 19. The levers 118 and 119 are ppnnected bya main lever 120 att-ached midway of'its ends to a bell-crank 121 haves l ingaspring 89. I

At Fig.. 13, the,releasing' link 50 is connected to one endet a floating lever 122, which e-fulcrnmed at 123 upon the end 'ffthebe'll crank 77. At its other end said lever is pivoted at 124 to a short link 125, the latter pivoted at 126 to the bell-crank 85. Upon depressing the key-47, the link 50 rises, raising the longarm of the lever 122 and depressing the short arm thereof, tlie latter vact-ing with the link125 to form a toggle,

whereby the pin and arms of the bell cranks 77 and 85 are pressed apart in opposition to the tensionof the spring 78, and the rolls 58, etc'., are permitted to drop from the platen.

.Many other variations may be resorted to within the scope of the invention; and portions of the improvements may be used without others.

Having thus described my invention, I claim: I

1. In a typewriting machine, mechanism for feeding paper in line vspace direction, including a series of pressure rolls arranged .end to end, individual bars extending along said rolls and connected respectively thereto, an equa-lizing pressure lever bearing at its ends upon said bars at points about midway of the length of the rolls, and means for applying pressure to the middle of said lever.

2. In a typewriting machine, mechanism for feeding paper in line space direction, including pressure rolls arranged end to end, individual bars extending along said rolls and connected .respectively thereto, an equalizing pressure lever bearing at its ends upon said bars at points about midway of the length of the rolls, and means for applying pressure to the middle of said lever, each roll being mounted for skewing movement independently of the other roll.

3. In a. typewriting machine, mechanism for feeding paper in line space direction,

.including a series of pressure rolls arranged end to end, an equalizing pressure lever having means at its ends to apply pressure to said rolls between the ends of each, and means for applying pressure to said lever about midway of its length.

4. In a typewriting machine, mechanismfor feeding paper in line space direction, including pressure rolls arranged end to end, an equalizing pressure lever having v:tor feeding paper in line-space direction,

including pressure rolls arran 'ed end to,

end, a single spring membenan means con trolled b sai spring member and. extendin to tie' rolls independently one of anot er, for pressing said rolls` against va.A

platen, said spring connected to said pressure rolls to hold either against the platen while the other is lifted from the platen.

G. In a typewriting machine, mechanism for feeding paper in line-space direction, including pressure rolls arranged end to end, a single spring, and means controlled by said spring for pressing said rolls against a platen, said spring connected to said pressure rolls to hold either against the platen while the other pressure roll is lifted from the platen, and to permit each pressure roll to skew one end away from the platen while the other end remains in contact with the platen.

7. In a typewriting machine, mechanism for feeding paper in line-space direction,

lincluding pressure rolls arranged end to end, a second series of rolls placed end to end, a single vspring member, and means controlled by said spring meti ber and extending to the rolls independently one 4of another, for pressing said rolls `against a platen, said spring connected to said pressure rolls to hold either rollin f` her series against the platen while the Y. .er roll is lifted from the platen.

8. In a. typewriting machine, mechanism for feeding paper in line space direction, including a series of pressure rolls arranged end to end, saidy series of rolls extending along a platen, a pair of guiding arms for each pressure roll, a bar connecting the arms in each pair, a lever extending from one bar to the other and bearing upon said bars between the ends of each, and means for applying pressure to said lever between its ends.

9. In a typewriting machine, mechanism for feeding paper in line space direction. including a series of pressure rolls arranged end to end, said series of rolls extending along a platen, a pair of guiding arms for each pressure roll, a bar connecting the arms in each pair, a lever extending from one bar to. the other and bearing upon said bars between the ends of each, means for applying pressure to said lever between its ends, each pressure roll capable of rocking or skewing at either of its ends away from the platen While the other end remains in contact with the platen, and a fixed bar extending along the platen to which said arms are loosely hung, said individual bars being loosely connected to said arms.`

10. In atypewriting machine, mechanism for feeding paper in line space direction,

including a series of more than two pressure rolls placed end to end along a platen, a spring, and compound equalizirig or pressure-distributing leversbetween said spring' and said pressure rolls.

11. In a typewriting machine, mechanism for feeding p aper in line space direction, including a series of pressure rolls arranged end to end,l individual bars extending along said rolls' and connected respectively thereto, an equalizing pressure level' bearing at its ends upon sald bars at points about midway of the length of the rolls, and means for applying pressure to the middle of said lever.

12. In a typewriting machine, mechanism for feeding paper in line space direction, including in combination a series of rolls, a platen, each rolll in the series being mounted to rock at one end away from the platen while the other end runs upon the platen, a Single spring, and means todistribute the pressure of said spring evenly between said rolls.

13. In a typewriting machine, mechanism for feeding paper in line space direction, including a series of pressure rolls arranged end to end, a second series of pressure rolls tandem to the first and also arranged end to end, a spring, and levers compounded to distribute the pressure of said spring on all of said rolls.

14. In a typewriting machine, the combination with a Series of pressure rolls arranged end to end, of an equalizing lever connected vto said. rolls, a second'series of pressure rolls tandem to the first and also arranged end to end and provided with an equalizing lever, means for applying pres sure to said equalizing levers to press all of the rolls againstI the platen, and a single key having means to release all of said rolls, each of said rolls mounted to skew or rock away at one en d from the platen while running at. its other end on the platen.

15. In a typewriting machine, the combination with arevoluble platen and a platen frame having a rod extending along the platen, of arms pivoted on said rod and extending forwardly and backwardly therefrom, rolls carried upon said arms to run upon the platen, a spring, and means to enable said spring to cause the rolls to press equally against the laten.

16. In a typewritlng machine, the combination with a revoluble platen and a platen frame, lof a roll, a ca'rrier therefor pivoted upon the platen frame, a second roll, a second roll carrier pivoted upon the first., a spring, and means controlled thereby and connected to the second roll carrier Ato cause both rolls to press upon the platen.

In a typewriting machine, the combintion with al revolub'le platen and 'a platen frame, ofa roll, a' carrier therefor pivoted upon the` platen' frame, a second roll, a carrier 'therefor pivoted upon the first carrier, a spring, and. meanscontrolled .thereby and connected .tothe second roll carrier to cause both rolls to press upon the platen, the second roll carrier hinged between lits ends to one end of the rst roll carrier, and the latter pivoted between its ends upon the platen `gt'rame.

18. Irl a typewriting machine, the cornbination with a revoluble platen and a platen frame, of a roll, a carrier therefor pivoted upon the platen frame, a second roll, a carrier therefor pivoted upon the first carrier, a spring, and means controlled thereby and:v connected to the second roll 1G carrier to cause both rolls to press upon the platen, the second roll carrier hinged between its ends to one end of the rst roll carrier, and the latter pivoted between its 'ends upon the platen frame, each carrier comprising a pair of arms loosely mounted and connected to permit its roll to, skew endwise away from the platen. 19. In a typewriting machine, the'com- -bination with a revoluble platen and a platen frame, of a roll, a carrier therefor pivoted upon the platenframe, a second roll, a carrier therefor pivoted upon the first carrier, a spring, and means controlled thereby and connected to the second roll carrier to cause both rolls to press upon the platen, the second roll carrier hinged between its ends to one ,end of the first roll carrier, and the latter pivoted bet'ween its ends upon the platen frame, each carrier lcomprising a pair of arms loosely,7 mounted and connected to permit its roll to skew endwise away from the platen, and'the arms of the second roll carrier loosely connected by a cross bar to which said spring is con- 4nected.

20. The. combination with a revoluble platen and' a platen frame, of a set 'of pressure roll devices, eachset comprising a roll, a carrier therefor pivoted upon the platen 40 frame, a second roll, a second roll carrier pivoted upon the firstvcarrier, and a spring connected to the second roll carrier to cause both rolls to press upon the platen.

21. The combination with a revoluble platen and a platen frame, of a set of pressure roll devices, each set comprising a roll, a carrier therefor pivoted upon the platen .'frame, a second roll, a second roll carrier pivoted upon the first carrier, and a spring connected to the second roll carrier to cause both rolls to press upon the platen, the second roll carrier hinged between its ends to one end of the first roll carrier, and the latter pivoted between its ends upon the platen frame. o 22. The combination with a revolible platen'and' a platen frame, of a set of pres- Isure roll devices, each setcomprising a roll,

a 'carrierf4 therefor pivoted upon the platen frame', a second roll, a second roll carrier pivoted upon the first carrier, and a/spring connected to the second roll carrier izo/cause both rolls to press upon the platen, the second roll carrier hinged between its ends to one endptlthe rst roll carrier, and the lat- "lathe ends ot each cross bar, said spring `oonbetween its ends to one end of the first roll ter pivoted between its ends upon the platen frame, each carrierv comprising a pair oi arms loosely mounted and connected tol permit its roll to skew away from the platen.,

23. The combination with a revoluble m platen and a platen frame, of a set of pres sure roll devices, each set comprising a roll,v

' a carrier therefor. pivoted upon the platen frame, a second roll, a second roll carrier pivoted upon the first carrier, and a spring 35 connected to the second roll carrier to cause both rolls to press upon the platen, the second roll carrier hinged between its ends to one end of the first roll carrier, and t e latter pivoted between its ends -upon the platen frame, each carrier comprising a pair of arms loosely mounted and connected to permit its roll to skew away :trom'the pla-ten, and the arms or' the second roll carrier loosely co-nnected by a cross bar tc which said spring is connected.

24. The combination with a revoiuble platen and a platen frame, ot a set e:tp:f.e-;-s sure roll devices, each set comprisinga roll, a carrier therefor pivoted upon the platen im frame, a second roll, a second roll "carrier" pivoted upon the first carrier, and a lspring connected to the second rollcarrier to cause both rolls to press upon the platen, the second roll carrier hinged between its hends to one end of the lirst roll carrier, and the latter pivoted between its ends upon the platen frame, each carrier comprising a pair of armsv loosely mounted and connected to permit its roll to skew away from the platen, and the arms of the second roll carrier loosely connected by a cross` bar to'which said spring is connected, and a lever attached at its ends to said cross bars between nected to said lever, whereby its pressure is' distribtedjlamong the four rolls. l

25. In a 'typewriting machine, the combination with a revoluble platen and a platen frame, of a'system of pressure rolls and appliances comprising two groups of pressure roll devices, each of said groups comprisingy two sets of pressure roll devices, veach set comprising a roll, a carrier therefor pivoted upon the platen frame, a second roll, a second roll carrier pivoted upon the first carrier, and a spring connected tothe second,D rol] carrier to cause both rolls to'press upii""`\\\ the platen, the second roll carrier hinged 120 carrier, and the latter pivoted between its ends upon the platen, each carrier compris-4 ing a pair of arms loosely mounted and connected to permit its roll to skew away from Athe platen, and the arms of the second roll carrier loosely connected by a cross bar to which said spring is connected, and a lever attached at its ends tof said cross bars between the ends of each cross bar, and said spring connected to `said lever, whereby its 13o Vpressure is distributed among the four rolls;

said levers connected by y a main lever to which said spring is attached, whereby the pressure of the latter is distributed among all the rolls in the system.

26. In a typewr'tine'machine, the combination with a revolule platen, of a pluits pressure among all the rolls in said sets;

27. In a typewriting machine, the combination withvarevoliible platen, of av plurahtyof feeding roll sets, each set comprising a vplurality o l' roll-Carriers connected to move together tomard oraway from the platen, one of the carriers -in each set being pivotedv or hinged upon the platen frame, and the second carrier being pivoted to the first,"a lever` connecting said sets, and a spring connected to said lever to distribute its pressure among all the rolls in said sets.

.28. In a typewriting machine, the combination with a'rvoluble platen and eight rol-ls to run thereon, of a single spring, and means to distribute the pressure of said spring among all of said rolls and permit each roll to move away from the platen 1ndependently of all the others.

29. In a typewriting machine, the combi- 'nation with ay revoluble platen and eight rolls to run thereon, of a single spring, and means to distribute the pressure of said spring among all of said rolls and permiteach .roll`to move away from the platen independently of all the others, each roll mounted to skew endwise away from the platen. 5 i

30. Ina typewriting machine, the combination with a revoluble platen, of a set of four rolls to run thereon,.a lever to which all of said rolls ar' connected, a second set` of four rolls to run upon the platen, a second lever to which all the rolls in the second set are connected, a third lever connecting the first and second levers, and a spring connected to the third levei"to distribute its pressure among the eight rolls.

31. The combination with a platen, of a 4xed rod extending along the platen, four rolls running on the platen on one side of said rod, four rolls running on the platen on the other side of said rod, all of said rolls mounted o-n said rod, a single spring, and means tor distributing the pressure of said spring among all of .said rolls, so that each may bear upon the platen independently of all the others.

32. In a typewriting machine, the combination with a revoluble platen, of a plu` rality of feeding roll sets, each set `comprising a plurality of roll-carriers connected to move together toward or away from the platen, a lever connecting said sets, a spring connected to said lever to distribute its pressure among all the rolls in said sets, and means for releasing all of the rolls simultaneously and holding them mechanically in released positions.

33. The combination with a platen, of a single-spring, mechanism by which the tension' of said spring may be transmitted to eight rolls to cause them to press against the and means Afor adjusting the tension of said spring. I

'34; The `combination with a platen, of a 'si'ngl`eispring, mechanism by which the tension of said 'spring may be transmitted to eight rolls to cause them to press against the platen, veach independently of all the others, means for 4adjusting the tension of said spring, and means for releasing the rolls In atypewriting machine, the combination with a rotatable platen, of a pressure roll between the center and each end of the platen, av single spring membr,'and means press against said platen with equal prestions to said rolls.

36. In a typewriting machine, the 'combination with a rotatable platen, of a pressure roll between'the center and each end of the platen, a single spring for the rolls, and means extending independently to the rolls for dividing pressure of said spring equally between said rolls.

37.' In a typewriting machine, the combination with a platen, ot a pair of pressure. rolls, a second pair ot' pressure rolls, a lever joining said pa1rs,and a spring holding said lever to cause both of said pairs to press against said platen.

38. In a typewriting machine, the combination with a platen, of apair of pressure rolls, a second pair of pressure rolls, a lever joining said pairs, a spring holding said lever vto cause both of said pairs to press saidlever to move said rolls from said platen.

a platen frame and a rotatable platen against the platen, a lever nearly parallel to the axis of one of said rolls to move it to and from the platen, a second lever pivoted on the platen frame to which said first lever is pivoted, a spring acting on said second lever to move-the first to press the rolls against the platen, and a key for moving said second lever against said spring to move said roll from said platen.

40. In a typewriter, the combination with a'platen frame`and a rotatable platen therein, of pressureh-olls to bear against the platen, each independently ot all the others,l

in opposition to the tension `of said'spring..

controlled thereby for causing the `Arolls tol against said platen, and a key forv moving 39. In a typewriter, the combination with mounted therein, of pressure rolls to bear platen, a frame carrying two of'said rolls comprising pivots to make the rolls. bear with equal pressure on the platen, a second framecarrying twol other of said rolls, a ,lever connecting said-frames, aspring moving' said-lever to cause said rolls to press againstthe platen, al crank carrying a pivot y for said lever, a link pivoted on an'arm of said crank and a key moving said link to move said rolls from said ,platen and ar ranged to lock them there.

4l. In a typewriter, the combination with -a `platen frame and a revoluhle platen therein, of a fixed rod extending lengthwise of said frame, and near said platen, a roll carrier pivoted on said rod, a roll in said carrier, a second carrier, a roll therein disposed on the side of said rod opposite said to said spring for causing said rolls to bear i against said platen, and a key for locking said rolls away from said platen.

43.. Ina typewriter, the combination with a/platen frame and a revoluble platen therein, of a fixed rod extending lengthwise of said frame and near said platen, a roll carrier pivoted on said rod., a roll in said carrier,` a second carrier, a roll therein disposed on rthe sideof said rod opposite said roll, a second' pair of rolls similarly disposed atanother point on said rod, a single spring, and means connected to said spring for causing all of said rolls to bear against said platen.

44. The combination, with a revoluble platen, of a series of .rolls extending along the laten, a second series of rolls also extendmg along the platen and tandem with the first series, a single spring member, and. means connecting with said spring member to all of said rolls in a manner to cause the rolls of either series to. bear against the platen while the rolls of the other series are raised from the platen, and also in a manner to cause the rolls at either end of the platen to bear against the same while the rolls at the other end of the platen are raised therefrom; each roll being skewable independently of all the others.

45. In a typewriting machine, the combination with a rotatable platen, of a pressure roll between the center and each end of therewith, a single tension spring nearly parallel to said platen, and means extending from said spring to said rolls to hold said rolls independently tensioned against' the platen. l f l BURNHAM C. STICKNEY. I/Vitnesses:

JOHN O. SEIFERT, K. FRANKFORT.

Copies of this patent may beA obtained for five cents each, by addressing the i Commissioner e Patente, 'Washingtbn D. C.

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