US1281102A - Type-writing machine. - Google Patents

Description

B. W. TUCKER 611. A. E. CRISWELL.

TYPE WRITING MACHINE.

APPLICATION FILED JANG. I916- muted 0013.8, 1918;.

#H IIII l 5 Inuuuuun TYPE WRITING MACHINE. APPLICATION FILED JAN. 6. I916.

Patented Oct. 8,1918.

2 SHEETS-SHEET 2.

oggoo Pi '.E

Snvenlm 191/ Tucke UNITEUSTATES PATENT OFFICE.

nnmmm w. rodxna, or scorn cannon, nnwmnsny', AND nuns A. E'KIN ems- WELL, or BROOKLYN, NEW YORK, Assronons TO oonorm ryrnwnrrnn COMPANY,

' 1110., A COBIOBATION OF NEW YORK.

' m nis-walrus monmn.

Specification of Letters latent.

. Application filed January 6, 1916. Serial No. 70,611.

To-alltuhom'z't may concern:

Be it 'known that we, BENJAMIN W. TUCKER and J AMEsA. EKIN CnrswELL, citiions of the United States, and residents of South Orange, county of Essex, and State of" New Jersey, and of the borough of Brooklyn, county ofKings, city and State ofNew York, respective have invented certain new and usefnllmprovements 1n 10 'Type-.Writing Machines, of which the following'isa full, clear, and exact description, This ,invention relates ,more particular-l tofthe carriages of typewriting machines.

One of the principal objectsof the invention is to rovide 'a carriage having a platen wherein t e platen may be positively supportedsat its ends and made'extenslble 1n.

order that wide sheets of paper,.. large envelops or otherwo'rk maybe properly supported to be written upon,- thus providing a carriage which may be shortened; or lengthened at. will and .th'ereby avoiding the necessity for providing interchangeable carriages and at. the same time overcoming many of theobjecti'ons incident to carriages as ordinarily constructed. y

Another object of the invention is to provide a carriage for writing machines whereinthe platen and supportlng parts therefor so may be simultaneousl extended at both ends so that the'work s eet may beproperly the type and the Era ase vide a carriage whereby the carriage asJwellas the ends" supportin I the platen maybe extended oneither or th sides to lengthen materially the carriage'to' adapt the machine for 'widepa er, large envelops,.

etc., to provide means w ereby the carriage and parts thereof, as. the escapement release extension of one end'of the platen carriage Corona portable-and foldable typewriter, it 10} will be understood" that the construction and'ypaper'feed release, may be operated notwlthstanding the extensibility of the car. riage .without materially complicating the construction or operation of the parts; to provide simple means whereby. thej linespacing meehanismmaybe-extende'd as the platen and its supporting baseareexten'ded; and to provide simple mjeans wh ereby the will'antomatically extend the other end. i .f .Another object ofthe, invention is tcproing means provided for the platen; and to provide simple and efilcient means where- Patented Oct. 8, 191s.

by the exten'siblepart of the platen carriage may be locked in any one of its adjustedinvention will be hereinafter more particuw larly described, with reference to the ac- :companyin drawings, which form a part 'ofthis ap'p ication, and will then be ointed out-.in the claims at the end of the escription.

,In the drawings, Figure 1 is a plan view broken away. centrally thereof of one form of platen carriage embodying the invention.

'Fig. 2 is a'front elevation.

Fig .3- is an end elevation.

Fig.v 4 is a vertical transverse section showinglone form of line-spacing mechanism, the section being'taken 'on the line IV IV of Figs. 1 and 2.

section taken on the line V-V of .Fig. '7.

Fig. 6 is an end view of the platen carriage looking in the direction opposite to qthatshown in Fig. 3.

. ,Fig. '7 is an enlarged ter illustration.

Fig. 8 is a fragmentary longitudinal section on a smaller scale of the platen in an extended condition.

adjusted positions.

Fi 10-is a fragmentary view showing one ormof escapement release; and

- Fig. 11 is an inFig. 10.."

Wl1'ile the inventionjis shown as constr'ucted for use n connection with the may be chan ed to adapt the invention with i the extensib e 'featnre'to be employed on Fig. 5 is an enlarged vertical transverse longitudinal section, the platen and carriage being shown shorter than ordinarily used for the purpose of bet end view of'the parts shown writing machines of various kinds and constructions.

The carriage has a base 11 which is adapted to travel along a carriage bed under 6 the control of suitable escapement mechanism in the usual or in any preferred way. This base 11'has a relatively fixed member 12 of a plate-like form and of any desired length, and above the base portion of the 10 member 12 are two slidable members 13 and .14. The members 13 and 141 form an extensible means for the base and are located adjacent to each other to adapt one partly to 'support and guide the other. The base 15' member 12 has upwardly extending flanges or walls 15 which form side guides and sup ports for flanges or walls 16 of the'slide member 14, said walls or the sides 16 being bent over at the upper portion to ride along 0 the upper edge of the walls 15. The slide member 13 is provided with upwardly extending Walls 17 adapted to rest against the inner face of the walls 16 and said walls 17 have their upper ends extending outward angularl with respect to the vertical portion. A substantially L-shaped member or plate 18 is secured to each wall 15 of the base member 12 and has the upper angular portion thereof extending inward over the upper end of the walls 16 and under the {outwardly extending angular portion of the iwalls 17 of the member 13. These members ?8 serve as retaining means and also as sepa- 'at ing means for the members 13 and 14 to permit the latter to be extended relatively to each other as will be jresently described. A member 19 substantially the same form as the base member 12 but inverted with respect thereto fits about the outer walls of 40 the several members and serves to inclose the same forn'lingla support for certain parts of the carriage. The member 19 has marginal lengthwise and downwardly extending walls 20. These walls together with the members 18 and the walls 15 are secured together and the said members 12, 18 and 19 remain in a normally fixed position with .respect to themembers 13 and 14. By this means a strong light base is provided where by certain members thereof may have a sliding movement relatively to the other members.

On one of the slide members of the base,

as 13 for example, is held a supporting end or bracket 21,-While on the member 14.at

the opposite end of the carriage is securely held an end or bracket. 22. The ends 21 and 22 by reason of the slidability of the members 13 and 14 may be moved toward or from each other and may be moved so as to extend the base of the carriage in'depend ently or'in unison as preferred. As shown,

means is provided whereby on the movement, of one end and one sltde member of the car- 66 megs, the other sllde member and the other tubular or other member 29 and movable platen is held between the ends or brackets end or bracket 21 is moved in unison in, an opposite direction, thus simultaneously extending both supporting ends .or brackets. As one means to secure the extension of both ends, one member, as the member 13, has a 70 rack 23 held thereto to move therewith and to the other slide member 141 of the base a rack 24 is held. These racks are-of any clesired length and may be constructed to be light and strong. Arranged substantially central of the carriageis a pinion 25 supported to rotate on therelati'vely fixed base member 12, and having its teeth adapted to engage the teeth of the racks 23 and 24. It will thus be evident that by moving either of the ends or brackets 21 and 22, a similar extension movement will be given to the opposite end and in unison so that, both ends or brackets 21 and 22 will be moved the same extent from opposite ends of. the base in order that the carriage may be adapted for extra widths of work sheets.

A platen 26 is rotatably held in the end brackets 21 and 22 of the carriage and is also constructed to be extended and be rotatably 8111))0I'il6d atits ends inall adjustments of the. brackets 21 and 22. The platen comprises an impact member 27 in the form t of a circular roll of rubber or other material, and arranged within-said member 27 is a tubular mounting 28 of metal or other mate rial adapted properly to support the impact member 27 At. each'end of the member 27 and held to slide lengthwise thereof is a within the member 29 is still another tubular or other member 30. The member 30 is provided with a slot 31in which a pin 32 secured to the tubular member 29 is adapted to slide, and saidtubular member 29 is similarly held by a pin and slot connection, as 3.2 and 32' respectively, with the relatively fixed mounting member 28. At the outer ends of each of the tubes 30 1s a bushing 3-3 and this bushing is provided with a stem or stud 34 one for each of the ends 21 and These studs are in axial alinementso that whatever their position they will rotatably hold the platen and sustain the same so that it will rotate true and properly in. said bracket, there being on one or-both of the studs 34 a knob 35 by which the platen may be rotated by the operator. As the 21 and 22, it will be evidentthatpn the moyem'ent of said ends 21 and 22 as previously described, the inner tubular members 30 will 'permit an extension of the ,platen a certain distance until the pins 32 at. each end of the platen reach the ends of'the'slots .125

i-lland when this takes place, the intermediate tubes '29 will .move in unison with the tubular members 30 stirring to give a further extension at each cm of the platen if such extension is desired or'necessary it being f li 15 .ot er a'd are 45 ave either or both ends j carriage. bn racks' aresimilarly constructedso that the 22 as well asthe extensible feaasusuall A bar 4.4

& guide for the wardly extendi 1'. l5 ing the wor k to understood that only one tube or "more than two'tubes may be platen to get greater or less extension than shown, if desirable.

To automatically extend the .platen at both ends various means may be employed.

' a ll showm, the inner telescopic tube 30' or .;l, oth'er member Lhasa rack 36 held thereto which extends lengthwise of the platen, and m iheld to the othe tube or member 30, at the 1 opposite end a the platen, is a rack 37.

audyare formedlon curved segmental guidportions38 which are opposed to each guided within the platen body; I The teeth of'the racks-36 and 37 are *engaged by a pinion 40 substantially cenrallyrof the platen so that when either one I l t of the ends 21 and 22 is extended as already described the telescopic or collapsing mem- "hers of the platen will also be extended and as one of the racks is movedrtheother rack is 'alsomoved, but in an opposite direction,

a thus forcing the opposite ends of the platen inwardly or outwardly,

rection the platen support ends are moved, nd whether or not the platen and carriage e tobe extended orshortened. At the cen ter of the platen and within the same is a o'ffil ler block or member 41.

, a stop against hgthe ends of the tubes 29 and ma restwhen thep'laten is inits'shorte'st condr tio n, and this block or member 41 conforms to l the cylindrical shape of the mounting 28 forming withthe impact member 27 the mainfibody ofthe platen. The pinion is rotatably held in a block 42 which may be secured to or formed integral with the mem- As thus shown, both ends of the 40 ber 1.

platenta'reextendedor shortened in unison,

though it will be understood that other means than the rack and pinions may be emloyed for this purpose or the platen may extended independently, thisbeingthe case also with respect to "the carriage wherein substantially similar meansis shown for moving both ends of the The pinions 25 and 40 and the ends 21 and turestof the platen may move to the same extentand in unison.

The; platen may have suitable ported to move'lengthwise of the cariyiage,

pose, and. each paper finger has a substantially U-shaped part 45 forming a slide and paper fingers. Extending upj wardly :f rom't 1e guide 45 is a spring portion 46 having its uppe1' end provided with inis .rotatably helda roll 48 to asslst in hold the platen body. A pluused at eachend of the A XyTh e. teeth of these racks extend inwardly in a fixed position so far as constructed to the body according to which This block 41 5O mayjhaye a tion 51 mounted of the platen.

. suitably located within .t'o-a 100 mg position,

provided for that lpur-* g logs or parts 4 7 in which .tively loc when the platen and carriage are, extended to assist in holding and guiding thework properly, particularly .Where wide sheets or, wide envelops or other work are written upon. As shown, two paper fingers are pro-' vided' and. these may be permanently attached to the front walls-16 and 17 of the extensible base members 14 and 13 respec tively, 'so as to move with said members when said members are extended or collapsed. The fingers 49 areconstrncted similar to the fingers 46 except that they remain independent relative movement is concerned, and each finger 49 cooperates with a platen section 50; .Each section 5O forms in substance an-end of the platen bod and is adapted to be moved toward an from said body to shorten and lengthen the platen. The sections 50 at the opposite ends of the platen are-similarly 27 and are supported on the inner telescopic tu so as to move therewith: The purpose of the platen ends or sections 50 is to ,support the outer ends of wide sheets of paper, envelo s,,-or other work heldto the of t"e,,platen. These sections also a ssi st in" theproper movement of the work with the... platen during the line-spacing and letter: feed movement thereof; Each platen section rubber or other; disk-like porupon'a cylindrical part or section 52, the latter being held as a part of the bushing-or part 33, The part or section 52, may be cut away so that I the outer end of the tube 29 may move partly into the bushing ormounting 52 at each end s a means for lockin thebase members and'the platen in the di erent adjusted positions, various means may be employed. As shown a dog or latch 53 is provided which is the base of the car-f riage above the member 13 and under the normally fixed base member 19. This do or latch; 53 may be held to a rod 54 whic is normally forced in one direction by means of a sp'rin 55 so as to force the dognormall Thedog has a toot i or end 56 which is adapted to enter aperturesf'56 or slots as preferred which may be cutout of the base members 13*andl4 and are so arranged that when the apertures of a5 gers as 423. These paper fingers-may be supment. A lever 57 is held to one end of the rality of paper fingers 49 may also be used bes or members 30, V

main body to or formed rod 54 and to the other end of said lever is a Y I ger portion 58 b which the dog may be released when the fever 57 is moved by the operator during-the extension or collapsing the carriage and platen. By this means laten and the carriage I are posied in any one of their adjusted iao . positions, and by reason of the racks and pinions all parts are locked against free relative movement until released.

The carriage is so constructed that it may be provided with the usual parts-and attachments which cooperate with and usually form a part of the carriage without affecting the adjustability of t -e platen and carriage or either of them. The main inclosing normally fixed member 19 may support the parts of tabulating mechanism, as well as the marginal stops, line-lock mechanism, and other features, and may also serve as a support for a paper apron 59. The paper apron and means for mounting the sameare substantially similar to that disclosed in the Corona typewriter. As shown, the apron is formed of a curved plate 60 which has depressed portions as ()1 adapted to engage studs 61 on the base member 19, and serve as a pivot for said apron. At'the forward portion of the paper apron parts thereof are depressed to provide a bearing for feed and pressure rolls 62,- the latter being. of the usual or any preferred construction, and are adapted to assist in feeding 'the 'work about the platen during the rotary 'movement' thereof. A scale 63 may be supported by the outer end of the paper apron as usual, and said paper apron may be normally forced in a direction to cause the roll or rolls 12 to press against the platen body by means of a spring (3% or otherwise. one end of which is attached at the rear of the'paper apron, and the other end to a lug or projeetion on the base member 19. The paper apron may he released by means of a lengthwise extending bar 65, one end of which is provided with a finger portion 66 to engage the under part of the paper apron body 59. The bar is suitably supported under the paper apron and at one end thereof is pro vided with an outwardlyextending handle as 67 in convenientreach for the operator whereby the operator may release the pres sure roll to adjust the work on the platen.

In addition to the knob 35 as means for rotating the platen and the extension sections thereof, suitable line-spacing mechanism is provided. The line-spacing mechanism may be substantially identical with the construction on the (lo'rona typewriter referred to, the construction and 'n'iounting being such however that said line spacing mechanism isalways accessible to the operator in any of the extended positions of the carriage and.plat.en or either of them, it being broadlynew so far as applicants are aware to so mount a line-spacing mechanism of any construction, ()ii the-left hand stud 34 of the platen. adjacent to the end sec tion St) on that side, of the carriage, is a toothed wheel (18. This toothed wheel is fixed to rotate wilh the platen and is normally held against movement by a roll 69 of the carriage, a lever 72 being provided to release the roll from the toothed wheel when desired. A hand-o} )erated lever 73 is mounted upon the stud 34. and carried by said lever is a pawl 74, which is adapted to engage the teeth of the wheel 68. A pin 75 is provided on one end of the-lever, and an adjustable stop 76 .is arranged on the other side of the lever between, which two stops the lever 73 is adapted to move. The stop 76 is normally held in its adjusted position by a spring 77 and may be rotated by means of a knob 78. The pawl is normally forced into an engaging position by means of a spring 75) carried by the lever 73,

and in the position shown in Fig. 3 is nor-" mally disengaged from the teeth by means of the pin 75 with which it contacts. The stop 76 limits the forward movement of the pawl and lever and determines the extent of movement of the platen for line-spacing as is usual, there being a spring, not shown, for restoring the lever 73 and pawl to its normal position. As-thus constructed, the linespacing may be variously arranged to move the platen on its axis for different line spacing movement, and the entire line-spacing mechanism partakes of the extension of the platen and the carriage.

The carriage may also have means whereby the escapement may be released to perniit the carriage to be moved freely forward or backward independently of the escapemcnt mechanism. The escapement mecha- Iiiism except so far as the rack is concerned is not shown, as it forms no part of the. present. invention, but may include a dog carrier or other means whereby the carriage may be released. As one means and as a part of the escapeinent mechanism, a rack 7 9 is shown under the base member 12 and supported under the carriage is a tappet bar or part 80. The bar 80 isadapted to be given an inward movement by means of a. for

wardly extending lever 81 on the forward end of which is a finger portion 82 so that on the movement of the lever the escapement dogs maybe released from the rack 68.

The carriage is adapted to be guided alon g a carriage bed, not shown, and-as iii the Corona typewriter a rail as 83 is provided at be constructed'so that it will be light and strong and yetnot aflect its writing characteristics; and that the platen may have more than onepressure roll cooperating therewith and so disposed-as will assist in the proper holding of the work and also in the proper alinement and working of the platen,-

It will be further understood that rolls or disks forming extension sections of the platen and of the same diameter may be held to ,the outer endsof the tubes 29 or otherwise I, asa further means to assist in supporting the work intermediate the main bod of the platen and the end sections. If desired the rack may be made in a plurality of sections I whiclrare'adapted toregister properly and a which permit the carriageto travel substantially the length of said carriage when extended. In this latter case the platen itself may be of the construction shown or longer and interchangeable rolls may be used, or

other extension means as rods or tubes, or separate roll sections corresponding to the extension of the carriage may be employed.

It will be evident from the foregoing that effective means is provided whereby the platen and carriage or either of them may be extended to, adapt wide sheets or envelops to be Written upon; that the work is properly' supported; that simple means is pro-, I

Yided whereby the "work may beheld substantially throughout its length; thatsimple.

means is provided whereby the parts may be effectually locked in any of, the adjusted positions; that .e adjustability of the carriage and platen or either of them does not affect the of the cooperating parts usually employed in connection with a carriage;

that the I adjustability and. extensibility of the carriage are such that the carriage and platen or other work-holding means may be applied to' carriagesand machines of various constructions; and that the invention is simple in construction and may be readily made and assembled;

Having thus described our invention, we claim as new and desire to secure by Letters Patent p a 1. In a typewriting machine,,the combination of so )porting means, a platen riitatably supporter at its ends in said supporting means, and-means whereby the supporting -means may be extended to increase or decrease the distance between of said platen. L i

the end supports 2;. In a typewriting machine, the combina-' tion of supporting means, an extensible work-sheet supporting roll rotatably sup ported atits ends in said supporting means, and means whereby the supporting means may be extended to increase or decrease the distance between the end supports of said work-sheet supporting roll.

3. In a typewriting machine, the combination of supportinn means, and an extensible 4 portion work-sheet supporting; roll rotatably sup- 2 ported at its ends in saldsupporting means. I 4. In a typewriting machine, thecombination of sup'portinn means, a work-sheet 'supporting roll rotatably supported at its ends bythe supporting means and the roll may be s multaneously extended to increase or decrease the distance between theendsup- I I ports of said roll. l

5'. In a typewriting machine, the combine tion of a base member, two relatively len h 10 In said supporting means, and means wherewise movable members guided on'said ase member, means whereby said members may be extended or collapsed, ends held to the lengthwise movable members, .a worksheet supporting roll journaled in said, ends, means whereby the ends may be moved'in unlson, and telescopic means adz'lpted to be moved in unison in .oppositedirections and forming means to lengthen or shorten the roll. I i I sis 6. In a typewriting machine, the combination of a base having relatively length;-

wise movable members, means whereb said members may be extended or collapse ends held to the extensible members, a paper holding means journaled in said-ends, and telescopic means adapted to be moved in opposite directions and forming means to lengthen 'or 's'horten the paperholding means. v. I 7. In a typewriting machine, the combination of a base having a relatively fixedand two relatively lengthwise members guided on said fixed member, means. whereby said movable members may be extended orcollapsed, a paper holding means journaled at its ends on said base, and telescopic'means to lengthen or shorten the paper-holding means.

1 8. 'In a typewriting machine, a carriage having relatively movable members to adapt the carriage to be lengthenedor shortened, 'platen supportin means carried by said members, and a p. aten rotatably mounted in saidsupporting means and having its support maintained in all positions of said members. a I

9. In a typewntmg machine, a carriage having relativelymovable members to adapt the carriage to .;be lengthened or shortened,

and an extensible work-sheet supporting roll supported in the carriage. I 10. In a typewriting machine, a carriage carriage to be lengthened or shortened, and a platen supported in said end members.

11. In-a typewriting machine, a platen a carriage having extensible supporting ends, and an extensible work sheet supporting roll rotatablyheld insaid' endsand havlng a adapted to receive the impact of the type. I

12. In a typewriting machine, a carriage,

having movable end members to adapt the i and a platen rotatably mounted thereon and comprising a roll, a. plurality of tubular e:- tensible members at each end of said roll, one of said members at each end being rotatably held in the carriage, meanswhereby the roll may be rotated, and means whereby the extensible members may be moved in unison.

14. In a typewriting machine, a carriage.

havlng a platen rotatably mounted thereon, said platen comprising aroll, a plurality of tubular extensible members at each end of said roll, one of said members at each end being'rotatably held in the carriage, and means whereby the extensible members may be moved in unison.

' 15. -In a typewriting machine, a carriage, a platen rotatably mounted thereon, feed means about the platen, and means whereby the platen structure and carriage may be extended. a

16. In a tyliiewriting machine, the combination of a carriage base, ends projecting upwardly from said base, a work-sheetsupporting roll comprising an impact cylindrical member, telescopic tubular members arranged at each end of the impact member, said telescopic members being connected to adapt said members to be extended or telescoped to shorten or lengthen the roll, a rack secured to one of the tclescopicmem bers, a second 'rack secured to another telescopic member at the opposite end of the platen, a pinion in mesh with both racks to adapt the telescopic members to be moved in unison, and means whereby the roll may be rotated.

17. In a typewriting machine, the combination of a carriage base. ends projecting upwardly from said base, a platen structure comprising an impact cylindrical member, telescopic tubular members arranged at each end of the impact member and forming a.

support for the platen structure, said tele-- scopic members being connected to adapt said membersto be extended or telescopcd to shorten or lengthen the platen structure, and means for moving the telescopic members in unison. v i

18. In a typewriting machine, the combination of an extensible carriage base, ends projecting upwardly from said base, a platen structure comprising an impact cylindrical member, means to adapt the platen structure to be extended or shortened, and rack vand pinion means for simultancmisly lengthening both ends of the platen structure.

19. In a typewriting machine, the combination of a carriage base, ends projecting upwardly from said base, a platen roll rotatabl'y held in the ends and comprising an impact cylindrical member, relatively movable members arranged at each end of the impact. member, said members being connected to adapt them to be extended or col-- lapsed to shorten or lengthen the platen roll, a rack secured to one of the members, a second rack secured to another member at the opposite end of the platen roll, and a pinion in mesh with both racks to adaptthe members to be moved in unison.

20. In a typewriting machine, carriage having a. base, wardly from said base, means whereby the base may be variously extended or short ened, n'leansfor locking the base in any one of the adjusted positions, a platen roll rotatably supported in said ends, line-spacing mechanism mounted to more with the ends when the base is extended or shortened, and telescopic connections whereby the platen roll may be extended and supported ,at its ends.

21. In a typewriting machine, a platen carriage having a base, a platen rotatably supported on the base, means whereby the base may be extended or shortened, and means for locking the base in its extended or shortened positions.

22. In a typewriting machine, a platen carriage having a base, ends extending up a platen ends extending up Wardly from said base, means whereby the base may be extended or rotatably supported in said ends, and linespacing mechanism mounted to move with one of the ends when the base extended or shortened.

In a typewriting machine, a platen carriage having a base, means whereby the base may be extended or shortened, means for locking the base in any one of the ad-' justed positions, a. platen rotatably supported on said base, and line-spacing mechanism mounted to more when the base extemled or shortened.

24. In,a typewriting machine, the combination of extensible supporting means, an extensible platen roll rotatably held in said supporting means and having a worlrsupporting impact member, and extensible sections adapted to support the work.

In a typewriting machine, the combination of supporting means, a platen roll rotatablydield in said supporting means and having: a relatively fixed work-supporting impact member, and extensible end sections adapted to support the outer edges of the work.

26. In a typewriting machine, the combination of extensible supporting means, and

the outer edges of.

shortened a )laten a laten roll otatably held in said support- 13a 1 to another adjustable men'ber, and a pinion ing means and having extensible end sec- "tions adapted to support the outer edges of the work.

27; In a typewriting machine,the comstructure supported by said'base, and a dogengagin parts of the baseto lock the same I in. itsa j usted position.

29, Inia typewritin'g machine, the combination of an extensible base having a plurality of adjustable members, a platen sup ported on-said base, and a dog engaging parts of the-base.- to lock the same in its ad usted position.

30. In a typewriting bination. of an extensible ing a plurality of members, means for sup.- porting work, a pivotally held dog engaging parts of the base to lock the same in its ad usted position, and a lever for moving said dog.

31. In a typewriting machine, a. carriage having a relatively fixed member provided machine, the comwith a rack to adapt the carriage to be moved along its bed, two oppositely movable plate-likeadjustable members guided to move lengthwise of i said relatively fixed member, a rack secured to one ofthe adjusttions and in unison.

able members, a second rack secured to another adjustable member, a pinion engaging the racks to move the same in opposite directions and in unison, and means for locking the lengthwise movable members in their adjusted positions.

32. In a typewriting macl'iine, having a relatively fixed member and adapted to be moved along. a bed, two oppositely .moving plate-like adjustable members ided to move lengthwise of said relatively xed member, a rack secured to one of the adjustable members, a second rack secured a carriage to cause the racks to move in opposite direc- 33. In a typewriting machine, a platen 56 carriage having a relatively fixed member,

two oppositely moving plate-like adjustable members guided to move lengthwise of said relatively fixed member,

means for moving said plate-like members lengthwise, and means for locking the lengthwise movable members in various adjusted positions.

'34. In a typewriting machine, a carriage having a base. member adapted for supporting two lengthwise mo a-ble members, brackets arranged on said rate the relatively movable carriage base hav- I to support the work.

able plate-like slid- I slidable members, means whereb the slidable members may be guided-an held, and

means supported in the ends of the brackets for holding the work sheet.

having marginal upwardly extending walls lengthwise thereof, two plate-like slidable members movable relatively tothe firstmentioned member and to each other and each having upwardly extending marginal walls, angular guidessec'ured to the firstmentioned .base member ada Jted 'to sepasli. able members and serve as a guide therefor, a plate-like In a typewriting machine, a carriagehavmg a. base member, two lengthw se mov-.

a carriage base comprising a relatively fixed member holding member having marginal walls extending downwardly to guide members, and extensible by the slidable members ofthe base adapted 37. In a, typewriting machine,

the slidable means supported a earnings 4 base comprlsing a relativelyfixed member having marginal upwardly extending walls lengthwise thereof, twoplate-like slidabl'e members movable relati'tely having upwardly extendin marginal Walls; a plate-like holding member having marthe slidable members, slidable members in different positions. and

to the first-men tloned member and. to each other and each extensible means supported by the-slidable members of the baseadapted to support the work. 7 4

38. In a typewriting machine, a carriage base comprising a relatively having marginal upwardly lengthwise thereof, two plate-like slidable members movable relatively tioned member and to each having upwardly extending ma andmeans supported by thesli able members of the base adapted to support the work.

39. In a typewriting machine, a carriage fixed member: extending walls to the first-mane! other and each? rginalwalls, M

base comprising a relatively fixed member having marginal upwardly extending walls lengthwise thereof,--- two plate-like slidable members movable relatively to the first-mentioned member and to each other and each havingupwardly extending marginal walls, means for locking'the slidable members in various positions, means for moving said slidable members in opposite directions, and a platen supported by the slidable members.

40. In a typewriting machine, a carriage, a platen rollg havlng a main body portion rotat'ably supported in the carriage, fingers coiiperating paper with the mainbody por- 130 tion, extensible platen roll end sections, and work/retaining means cooperating with said sections and movable therewith.

41. In a typewriting machine, a carriage, a platen roll having a main body portion rotatably supported in the carriage, extensible platen end sections, and work retaining means cooperating with said sections.

42. In a typewriting machine, the combi:

nation of an extensible carriage, an extensible platen roll rotatably supported in said carriage at its ends, means cooperating wlth the platen to assist inholding the work thereto a part of said means being extensible, feeding means cooperating with the platen roll, a scale located adjacent to the platen roll and unaifected by the extension thereof, means for releasing the papenfeed means, line-spacing means, a rack mounted upon the carriage, and escapement releasing means also mounted on the carriage and unaffected by the extension of the carriage or platen roll sections.

43. In a typewriting machine, the combination of an extensible carriage, an extensible platen roll rotatably supported in said carriage at its ends, feeding means coopen at-ing with the platen roll, and means for releasing the paper feed means.

4 1. In a typwriting machine, the combination of an extensible carriage, an extensible platen roll rotatably supported in said carriage at its ends, means cooperating with the platen roll to assist in holding the work thereto a part of said means being extensible, feeding means cooperating with the platen roll, and means for releasing the paper feed means.

45. In a typewriting machine, the combination of an extensible platen carriage, 'a platen rotatably SlllJ'POl'tQd on the carriage,

and line spadug means maintained in cooperative relation With the platen when said carriage is extended or contracted.

16. In a typewriting machine, the combination of an extensiblework-sheet support, means for supporting the work-sheet support in extended or contracted condition, and line spacing means maintained in 0perative relation to the extensible work-sheet support in the extended or contracted positions thereof. I

47. In a ty ewriting machine, a carriage having extensible platensupporting means, and a platen rotatably mounted in said extensible supporting means and having its support therein maintained in all positions of said extensible means.

48. In a typewriting machine, a carriage having a base member, two lengthwise movable plate-like slidable members, end brackets arranged on said slid-able members, means \Vl'lePGlJy the slidable members may be guided and held, and a platen supported in the brackets.

This specification Signed this 4th day of January A. D. 1916.

BENJAMIN W. TUCKER. JAMES A. EKIN CRISWELL.

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