US949105A - Type-writing machine. - Google Patents

Description

0. WOODWARD.

TYPE WRITNG MACHINE.

APPLIGATIQN mun rm. 5, 1900.

Patented Feb.15,' 1910.

2 SHEETS-SHEET 1.

14u15 TTUHNEY 0. WOODWARD.

TYPE WRITING MACHINE.

APPLICATION ULEB rms. 5, 190s.

Patented Feb. 15, 1910.

2 SHEETS-.SHEET 2.

UNITED STATES PATENT oEEioE.

OSCAR WOODWARD, F NEW YORK, N. Y.. ASSIGNOR TO DENSMORE TYPEWRITER COM- PANY, OF SYRACUSE, NEW YORK. A CORPORATION OF NEW YORK.

TYPE-W RI'ING MACHINE.

Specification of Letters Patent.

Patented Feb. 15, 1910.

A Application led February 5, 1906. Serial No. 299,536.

To all whom 'it 'may concern:

Be it known that l, Oscan Woonwann, citizen ot' the United States, and resident of -the borough of Manhattan, city of New York, in the county of New York and State ot Newv York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a speciteation.

,y M v invention, stated generally, relates to carriages for typewriting machines, parts -coniinonly associated with said carriages and to carriage mountings or bearings;

'lhe main ob`ect of the invention is to improve generaily devices of the class i' ieri-ed to.

Other objects will appear in the course of the following specification.

To the above ends the invention resides in the features of construction, combinations ot devices and arrangements of parts hereiuafter fully described and particularly pointed out in the claims. l

I have illustrated my improvements as applied to a machine resembling gene il J one style of the typewriter commercially known as the Dcnsinore, but it is to be understood that said improvements may be applied in whole or in part to other forms of writing machines.

ln the accompanying drawings, Figure. l is a fragmentary to plan view of a typewritiug machine ein odying my invention, parts being broken away and other parts being omitted for the sake of clearness. Fig. 2 is an enlarged fragmentary side elevation of the upper part of the machine, parts heing broken away and other parts being omitted for the sake of clearness'. Fig. 3 is an enlarged fra mentar)` rear elevation of a part liereina ter called the carriage truck, and showing roller hearings for the carriage mounted in said truck. F ig. 4 is a sectional view, taken on a plane repre sented bv the line .2--2 in Fig. 3 and looking in the direction of the. arrow, said Fig. i

. being drawn to a larger scalethan Fig. 3.

.Avv-.

esta.

'Fig 5 is a sectional view taken on the line y-y in Fig. 2E and looking in the direction of the arrow, said Fig. 5 being drawn to the sa'nie scale as Fig. 4. Fig. 6 is an enlarged fragmentary detail view at the, right-hand of the carria ge and looking from the front, sind view being partly in section'and showing one of the connections between the 'two pa rts of the platen carriage, Said two parts being hereinafter termed the platen truck and the platen frame. Fig. 7 is a view corresponding to Fig. 6 but showing some of the devices in different. relations from those 1n which thevappear in said Fig. G. Fig. S is a view taken on a plane represented by the line a-.r in Fig. 6 and looking in the direction of the arrow. Fig. 9 is an en` larged fragmentary detail view showingthe carriage feed rack and the carriage Yfeed pinion as theyr appear when viewed -froin the right-hand side of themacliine, the feed rack being shown in section and out of mesh with the feed pinion in position tor releasing the carriage. Fig. l0 is'an enlarged fragmentary front view, partly in section. showing the left-hand portion of the carriage feed rack and its mounting. Fig. 11 isa sec tional view taken on a plane represented by the line 'ic-u' in Fig. 10 and looking in the direction of the arrow. Fig. 12 is a fragmentary bottom plan view ofthe carringe feed rack on an enlarged scale. 13 shows in detail rear and side elevation the construction of the carriage feed pinion on an enlarged scale. Fig. 14 is an enlarged fragmeiitar)T horizontal sectional view taken through the longitudinal axis of the rear bar of the platen frame and showing the riglithand rear corner of said frame.

In the drawings, the main frame of the machine is shown in Figs. 1 and 2 as fomprising a base frame l, corner posts '2 nd a top plate 3 secured at the top of the cl'rner posts. A set of type bars (not shown) is mounted suitably on the top plate and key levers (not shown) are mounted in the hase and suitably connected with the type bars. A shiftable rail or track-way 4 is arranged above the top plate and is supported at either side of the machine by arms :'i which are pivoted at. 6 to the frame of the inachine, said arms being connected with suitable mechanism for imparting a fore and afi movement to saidi'ail 4 for shifting the platen of the machine to change the case position thereof. Said platen. represented by the reference character 7, is cylindrical and is irovidcd with an axle S, the ends of which have the usual finger wheels 9 secured to them. One. end of the platen is suitwheel 10 which is adapted to coperate with any suitable construction of line spacing mechanism. The platen axle 8 is jouriialed in horizontally disposed side bars 11 of a platen frame, the forward ends of said side liars beinnf connected by a front bar 12. A bearing block 13, in which 'Ls ivoted a wheel 1+i, is suitably secured to the ront bar 12 and said wheel l-i is guided and supported in the grooved shift rail 4. The rear end of each side bar is provided with a collar portion 15, which, as shown in Fig.'14, is formed with a perforation 1G. A bushing 17, provided with a polygonal head 18 and with an externally threaded inner end portion, enters each perforation 1G, the inner p'ortion of the bushing screwing into the end of a hollow rod or bar 19, the ends of which are internally threaded at 20 to cooperate with the threaded portions of the bushings 1T. The hollow har 19, as will he best understood from Fig. 1, extends longitudinally oi the platen and the ends of said bar are ref1 ceived in eountersiiiks 21 in the collars i5 (Fig. 14). i Bj.' tightenin the screw bush ings 1T the side bars 11 othc platen fraitie are clamped between the heads of said bush-- ings' and the ends of the liollo.w bar 19, the construction beingr such that the hollow bar 1f) couaitutes with the side hais 11 and the .ti-ont bar 12 a rigid 'rectangular platen Aframe. rod 22 is received inthe bore of the hollow' rod or bar 19 and extends throughout the length of the latter, being journaled intlie screw bushings 1T, as seen in Fig. 14. The ends of the rod 22 project laterally beyond the heads 18 of the bushings and receive arms 23. These :irais are shown in Figs. l, 2, 6, S findvf), Each. arin is provided at its iop with a collar portion 24 which surrounds the rod and is split as indicated at 25, the split portions of ilul collars being connected by headed screws 26 which vserre to secure tlie'ai'nis 2li in lilac@ on the ends of the Vi'od 2" The construction such that the arms :23 are ad instable both longitudinally of the rod 22 and also cireiiinfcrcntialiy lhercof.- The arms depend from the rod and their lower ends are formed with holes into whit-.li are driven flanged busliingsil'., said bushings' providing bearings for the devices which serve to connect the platen frame with the being best shown in Figsi -carriagc truck, which truck and which devices will now be described.

The carriage truck is 'disclosed in its' entirety in Fig. 1; it. comprises :i bar-like por-A tion 28 extending longitudinally" of the platen in the rear thereof and :irais at the ends of the bar, said armsprojeeting downwardly and forwardly from said bar and 2, i and 8. Each arm comprises a forwardly and downwardly extending cui-red ortion 29am] a horizontally disposed portion it() which efe tends forwardly from the lower end of tlie` curved-portion 2f). Midway of its length each of the horizontal portions 30 is provided with threaded openings which receive screw bushings Si, the inner ends of said bushings being close to the flanges of the busliines 27 in the arms 23, and the outer ends oria said bushings 31 proecting beyond the faces of the portions 30 o the side arms. Eaclferm portion 30 is cut away as indicated at 30a to permit the associate arm 23 to ex'- tend downwardly close to the bushingi. The bushings 3i. provide bearings for pivot; members or bolts which are most clearly disclosed in Figs. 6 and 7. Each pivot ineinber comprises a pivot portion 32, a cylindrical bearing portion 33,- bearing in the associate bushing 31, a head 34 aiid a stem A helical wirespring, 3G is coiled around the stem 35. One end of said spring abuts against. the head 34 and the other end against a. cover 3i' which is internally threaded and screwed en the outwardly pro- )ceting en d of the associate bushing 31,'the top of -said cover being provided with an .opening to permit of the passage therethrough of the stein 35 of the pivot member. The springs 3G tend constantly to press the pivoty members inward toward each other and serve to maintain the pivot portions 32 of said members normally in engagement-A with tlie bushings 2 in the lower ends of the arms 23, as clearly slioirntin Fie'. G. Suitably secured to the outer end o? each stem a cap piece SS which surrounds and bears upon the outside of the associate cover 37. Each cap piece is provided with a slot 39 Yat; its inner end, said 'slot normally co- Y operating with a screw stop 40 which is secured in the cover 3T, as seen in Figsl and 6. The pivot members, it will be under! stood, are iii alineincntand their pivot portions 32 coperate-with the armsV 23, serving as pivots about which thearins swing when the platen carrier is moved back and forth to change case, During this to-and-fro case shifting movement of the platen frame,

it will be'understood that a relative rotary movement takes place between the rod 22 and its bearings 1i'. Vi'hen it is desired *o detach the platen frame or carri-J;- from the carriage truck in order to remove it. from the machine, the caps38 of the pivot niembers are pulled outward away from each' other, disengaging thepivot -portions 32 from their bearings in the arms 23. The parts are so proportioned that when a lon i tudinal movement sullicieut to disengage tie pivot portions 32 has been communicated to the pivot, members, the slots 39 in the caps 38 will be disengaged from tlie'associated stops or screws 40. Y A rotary movement' may then be communicated to the pivot inenibers by turning the caps 38, said rotary movement carrying the slots in said caps out leer.

of register with the. stops 40, so that `when said caps are released their inner ends contact with the stops 40 and retain the pivot members locked in inoperative position, as indicated in Fig. 7. With the pivot menibers inoperative as shown in Fig. T, th platen carrier is disconnected from the. carringe truck and may be removed from the machine without disturbing said carriage truck.

As shown in Figs. C. T and S a metal strip 4l is secured b v screii's l2 to thc under side of each carriage. arm portion $30, said metal .st-rip bridging the bottoni of the cut-away 3()a in said aria portion and being curved downwardly at 43 niidwa) of its length. ln replacing the platen carrier in the inachine the strips il serve as guiding and centering means. the lower ends of the arms 23 being received in the downwardly curved portions 43 of the strips. and hereby properly centered, so that when the caps 2G are turned to rlease the pii'ot members to pcrinit of their rengagement with the arin 23, the bearings 2i in said arms will bc in alineinent with the pivot portions 3Q.

In order' to limitproperly the to-and-fro case shifting moi'ement of the platen carrier in the carriage truck. I provide means which will now he described. Said means comprise brackets 44. shown in Figs. 1, 2 t3. 'i and S. The brackets 44 are secured against the outer faces of the side arms of thccarriage truck b v headed screws 45 which pass freely through enlarged openings 46 (Fig. if; in the brackets 44 rnd are received in threaded openings in the horizontal arm portionstl. llach bracketis ent a way as indicated at -li' in order not to interfere with the outwardly projecting cover 3T. Projecting inwardly at right angles from the body. of each bracket 1H are walls 48 spaced apart as shown in Figs. I and S. The toi-ward wall receives a limiting .screw -'H which isV provided with a check nut 50. An .|d iusfing screw 5l is threaded in each downii'afdly curved arm portion 29 of the carriage truck, the forward end of said screw aLLtting against the rear face of the rear ivall 48 of the associate bracket 4l. rlhe ends ot' the rod are adapted to contact with the rear wall 48 and with the end of the screw 49 in the front wall of the bracket 44, and thus serve as stops on the platen carrier which cooperate with stops on thc carriage truck to limit the case shift. movement of the platen carrier on the truck. By adjusting the screw 49 toward or away from the opposite wall 4S the amount. of the case shift movement. is regulated, this regulation, it will be noted, being obtained by a single operation. In assembling the parts, the screw 4S) may be secured in proper position by the check not. 50 and thereafter the relation between thc two stops on the carriage truck at. cach side l Il i i l i i l l i i `45 which secure the brackets 44 in place are loosened and thereafter the associate ad justing screws 51 are screwed in or out as desired. The brackets 44 aic then brought into contact with the ends of said adjusting screws 51 and thereafter the securing screws l5 are tightened to retain the brackets in their new and adjusted positions. In one of its ease positions, the platen carrier is disposed as shown in Figs. l. E2 and 8 with the ends of the rod :22 in contact with the ends of the screws 49. When it is desired to change case` the shift rail 4 is swung rearwardly about its pivots b v moans of snitable actuating mechanism before referred to, thereby causing the platen carrier to 'oe moved rearwardly, the arius 2?, swinging on the pivotal members and thc ends of the rod Q2 moving away from the screw stops 4S). The rearward movement of the platen carrier continues until the ends of the. rod Q2 contact with the rear walls 48 of the brackets 44. 'hen this occurs the platen is in proper position for writing in the other case.

Referring now to the carriage truck and the means for guiding and supporting it, reference to be had chietly to Figs. 1` 2, 3, l and 5i. The bar 9.8 is cut away or slotted midway of its length at the. rear, as indicated at 52. Received within the slot is a bracket 53. ,\t its top said bracket is provided with laterally disposed cars 54 which are provided with pcrl'oratioiis 55. Headed screws 56 pass freely through the openings 55 and are received in threaded ppcnings in thc top of thebar 25, thereby securing said bracket in place. The shanks of the screws 56 are smaller than the openings 55, the construction being such that when said screws are loosened said bracket.- has a limiting movement fore and aft of the machine by reason of the enlargd openings 55. As best shown in Figs. 3 and 4, thc bracket is provided with an opening 57 which receives a wheel 5S, the axle 5!) whereof -iS vertically disposed and is coiled at its ends. 'Below the axle 59 the bearing bracket. 53 Aisprovided with a threaded opening which receives an upwardly extending threaded ball-cup 60, the lower end of said ball-cup being rovided with a polygonal adjusting hea. (3l and the upper end being cupped out to provide a seat for a set of anti-friction balls 62 which cooperates with the lower end of the axle 59. Above the wheel 5S the bracket 53 is provided with a threaded opening G3 in the lower portion of which the axle 59 turns. Screwed into the opening 63 from the to is a threaded ball cup 64, the topofwliicii is provided with a nick 65 for an.: adjusting a c rayman-ruimen tool and the bottom of which is formed with a hall scat which receives a set of anti-friction balls GG, said balls` cooperating with the upper end of the axle 59. A locking nut 6T is screwed on the ball cup member Fri and serves to retain the latter in 'adjusted position. The adjustable cups 60 and 64 not only allord an adjustment for the bearing balls but they also afford a vertical adjustment of the wheel 58 relatively to the truck. At either side of the threaded opening 66, the bracket 53 is provided with horizontal threaded openings which receive adjusting screws GS, the ends of said screws abutting against, the' forward wall of the cut-away or slot- 52 in the carriage bar 28. By loosening the securing screws 56 the adjusting screws GS may be turned in or out to adjust the bracket 53 fore and aft of the machine transhearing for the carriage. T

vcrsely of the carriage bar. Near its ends the carriage bar 28V is provided with down- -wardly extending lugs G9. said lugs being formed at their front sides with slots Tt) (Fig. 5), which receive bearing wheels Tl. The wheels 71 have vertically disposed axles T2, the ends whereof are preferably coiled, the lower end ot' each coperating with amifriction balls 73 which are seated'in a hall cup 74 received in a threaded opening in the lug G9, said ball cup being entered in said opening from the bottom and being provided with a polygonal head 75 by which it may be readily adjusted in place. The upper end of each axle 72 cooperates with antifriction balls 76 which are seated in a screw like ball cup T7, the 'latter screwing down through a threaded opening 78 and being provided with a locking nut 79 which serves to hold it securely in place after it has been properly adjusted.

lhc peripheries of the wheel 58 and' the wheels T1 mounted on the carriage truck are preferably rounded and coperatie with Vgrooves S() formed in the inner faces of vertically disposed parallel' walls 81 of a track-way, thereby providing a three-'point e walls 81 are connected at the bottom by a base portion 82. The track-way, comprising the horiizontal bottom portion 82 and the'parallel vertically disposed walls 81, resembles a trough, as willbe best understood from a consideration of Figs. 1 and 2 Said track- .wav is suitablv securedto lu s S3 inte al g gr with and extending -upwardl from the top plate 3 o' the machine: Tris construction provides a track or gaine, way or the roller bearings of the carriage which is exceptionally stronigeand rigid -and the' tracks '80 wherein mav. readily formed in parallelism and willthereafter remain in parallelism. -The wheels 71 coperate with the front track-way 8O and the wheel 58.with

the rear track-way 80.. The adjusting' screws 68 provide means for et'ecting a horizontal adjustment of the rollersl 58 and 7l. for taking up wear of the rollers in the bearings SO while the adjustable ball cups which coperate with the axles of each wheel provide means for adjusting the carriage truck verticallv in respect of the trackway and also provide independent, adjusting means for adjusting each wheel 58 or .71 relatively one to another' to secure proper cooperation of the rollers with their tracks SO'and to prevent them from binding therein. The wheels, it will be noted, turn on ball bearings and the friction generated is reduced to a minimum.. I desu-e it to be understood that lwhere in the Ysubjoined claims roller bearings are recited, said roller bearings may be either balls or wheels. Near the right-hand end the bottom S2 of the track-way is provided witlra threaded open- -ing which receives a screw cup Si (Fig. 85

2) open at the top. A plunger stop 85 is seated in the cup and is normally projected upward into the path of the right-hand lug (if) on the carriage bar under the influence of a coiled springSG which surrounds the stem 8T of said plunger and is confined between the plunger head and the vbottom of the` screw cup 84. The stem of the plunger stop 85 project downwardly through an opening in the bottom of the screw cup and is provided with a cap 8S, said cap being formed with a slot S9 which t .iperates with a screw `stop 90 fixed in the side of the screw cup 34. Said screw cup is provided with a polygonal adjusting portion 91. The construction resembles generallj1 that of the pivot members and the associated parts shown in Figs. t3 and 7. Normally the plunger stop 85 will coiiperate with the riohthand lug G9 to prevent the accidental with- 105 drawal ofthe arriage truci: from the trackway, when, however, it is desired to remove the carriageltruck from the machine the cap 8S may be pulled down until its slot; 89

disengages from the stop 90, whereupon the 110 cap may be turned so that its top edge will cooperate with the stop 90 to maintain' the plunger stop 85 lowered and out of the ath. of the carriage lug'tt). An arm 92 tigs.

1 and 2') projects rearwardly from the car- 115 across the top plate. The leftward move-|25 ment of the carriage under the influence of* the spring drum, however, is normniy con.` trolled by a carriage feed rack and coper ing devices.

The carriage feed rack isl indicated by the 139 fr connected with reference numeral 16 and is shown in Figs. 1, 2. 9, 10, 11 and 1Q. Said feed rack is provided with downwardly projecting teeth 9i. The front faces of said teeth are beveled, as indicated at. 98, for a purpose presenti).v to be described. The ends of the feed rack JG are provided with bearing blocks 9E?. These bearing blocks are .provided with slots or kert's which enable the blocks to be l'itted over the ends of the rack tnt, as clearly shown in Fig. 11. The blocks are secured in place by screws 100 which are received in threaded openings vin said blocks and pass through elongated holes 101 (Fig. l0) in the carringe rack. By loosening the screws the rack may be vertically adjusted in respect of its bearing blocks. The outer ends of said bearing blocks are provided with bearing openings 102 which cooperate with the pivot portions 103 of pivot screws 104, said pivot screws being received in threaded openings in the curved portions 2S) of the side bars of the carriage truck. Locking nuts 105 serve to secure said pivot screws in adjusted position. By this construction it will be seen that the carriage feed rack 96 is pivotally mounted in the sid-s of the carri-age truck. A horizontally disposed coiled spring 106 has its forward end hooked around a pin .107 on the top of the carriage feed rack, th rear end of said spring being adjustably secured to a screw 108 ou the carriage truck. haid spring plays in a groove in the carriage bar 2H' and constantly urges the toothed portion or lower edge of the feed rack 96 forwardly about its pi". ots and norman) maintains said feed rack in engagement with a carriage feed pinion 10!) tired to the forward end ot` a horizontally disposed shaft llt). The shaft 119 rotates in tixed bearings andserves to connect said feed pinion with escapement devices (not shown) of suitable construction, which atV printing operation are adapted to cooperate in a known manner' to permit the,

' carriage to be drawn a letter space leftward under the influence of the .spring drinn 95. As clearly shown in Fig. 13, the teeth 111 ot the carriage feed pinion are beveled at the rear. as indicated at 112. so that the rear edges ot' said teeth are comparatively sharp.

'l'he platen carriage may be released from the cscapement devices so that it may be moved frwlj.' from side to side of the-ma chin'c across the top plate by means that are now to be described.

Secured against the rear face of the. let'thand bearing block 9i) (Figs. t), l0 and 11) is a releasing member comprisinga body portion 113, and an angular artn extending from the body portion upwardly and latcrally outward and indicated by the reference numeral 114, said arm havimer at its outer cnil a cross arm 114 provided with lingerpieces 115 and llt. The bodv portion 1125 of the releasing member is perforatcd to permit of the passage of the smevvs 100 which serve to secure the releasing member in place against the. rear of the left-hand bearing block 11). When the platen carrier is in normal position and it is desired to free or release the carriage. from the escapeinentdevices. the finger piece or release key 116, which is the forwardly projecting key of the double keyed release member. is depressed. This .serves to swing the rack no rearwardly against the force exerted by tht` spring 10G, disengaging said-rack from the feed pinion 109. The released position of the rack is indicated in Fig. 9 from which it will bel seen that the rack is completel)7 separated from the pinion so that the carriage may be moved freely in either direction across the top plate. Then pressure is removed from the key 11G, the s )ring 1013 swings the lower' end of the rack orwardly about its pivots and the bevels 98 lon the rack teeth coperate with the bevels 11i) on the pinion teeth to effecten easy and ce1; 1in r'engagement beltween the carriage feed rack and the ear riage feed in ion. It the .platen carrier happens to 1n raised position, exposing the writing and the under side of the platen,

and it then be desired to'releasethe carriage from the carriage feeding intanism, ttie tinger ieee-115 will be found conveniently situate for the purpose. The finger of the operator engages the back of the key 115l and pulls it. forward, ther-hyeteetmg the discin gagement ofthe racknd pinion m thc nntn- Yner described above.4

Various changes may be made without dep'arting from the spirit and scope of my in#v vention.

What i clainrals new and desire; to secure-A" by Letters latcnt, iszs'- 1. In a typewriting. machine, the combination ot' a platen; a platen earriageeoniprising two parts, one shiftahle on the other;

a shaft extending longitudinally of thc platen and Vbearing in the shiftabli'-, part, said shaft serving as an axle about which said shiftahlc part may he turned to expose the writing; and arms rigid with said shaft,

said arms being pirated on the non-shifting f part of .said carriage.

2. ln a typcwritinlg machine. thel combination of a platen; a platen carriage comprisiupr two parts, one shiltable on thc other;

and izonnectionsvlwtwecn said parts. said"- conluwtions comprisiitgn shaft which serves as an axle. about which thc shiftahle part may be turned to expose the writing and arms rigid with said shalt, said arms being pivotallv eonnecteil with the non-sbiftablev part of said carriage.

il. 1n a tylwwriting machine. the combinationv ol' a platen; a shil'table platen frame comprising a hollow bar extendingr lor-gittldlnallynf the platen: :l shaft exteudingbl'V through lli'e bom nl' said hollow bar; a car-V v tion of a platen; a shiftable platen frame comprising a hollow bar extendinglongitudinally of the platen; a shaft extending through the bore of said hollow bar and journaled near its ends in bearings iii the hollow bar; arms secured to said shaft outside its `iournals; and a carriage truck on which said arms are pivoted.

in a typewriting machine, the coiiibinal tion of a platen; a sliitftable platen frame comprising a liollowbar extending longitudinally 'of the platen; screw bushings c0- operating with the sides of said platen frame and the ends of said hollow bar; a shaft extending through the bore of said hollow bai and journaled in said bushings; a carriage f truck; and connections between said shaft and said carriage truck.

G. 11i a typeii'riting machine, the coiiibination of a platen; a ,shiftable platen frame comprising a hollow bar extending longitudinally of the platen; a shaft extending through the bore of said hollow bar and journaled near its ends in bearings in the Vhollow bar; arms, each provided with a splitV collar atone end and with a bearing at the other, the collar portions of said arms being secured oit said shaft outside its ioiirnals;

and a carriage truck provided with pivots col operating with the bearings in the ends of said arms.

VT. ln a typewriting machine, the combina` tion of a platen; a'sliiftable platen frame comprising a hollow bar exteiidiiiglongitudinallj, of the platen; screw bushings conneetiiig the sides of Said platen frame with the ends of said hollow bar; a shaft extendiiig through said hollow bar and journaled f in said bushings; arms= each provided with a split collar at one end and with an opening provided with a bushing at the ther end; the collar portions of said arms being secured on said shaft outside said screw bushings; and a carriage truck provide-l with pivots coperating witli'the bushings in said arms.

8. In a typewriting machine, the combination of a platen; a shiftable platen frame comprising a hollow7 bar extending longitudinally of the platen; a shaft extending through the bore of said hollow bar; a earriagc truck; connections between said shaft and saiC carriage truck; and brackets on said carriage truck, said brackets coperating with the end ortions of said shaft.

9. In a. typewriting machine, the combii nation of a platen; a shiftable platen frame carriage truck, each pair eoperative with one of the stops on said platen frame, and .each of said pairs of stops .being adjustable ata single operation.

l0. ln a typewriting niaehine, the combination of a platen; a shit'table pla-teu traine therefor; a carriage truck with which said platen frame is connected: stops on said .platen frame; and pairs of stops on said carriage truck, each pair cooperative with g one of the stops on said platen .traine and i eaeh'of said pairs ol' stops being adjustable I without varying the relation between the two stops comprising the pair. i ll. ln a tni'pewritiug machine, the combi- Q nation of a platen; a sliiftable platei; frame l therefor: a carriage truck with which said `platen frame is connected; stops on said platen frame: -and pairsl or' stops on said 4"carriage truck, each pair cooperative with one of the stops on said platen traine and i the stops of each pair of stops being relatively adjustable; and means i'or adjusting both stops of each pair at a single operation without altering the relation between tlieiu.

lLt lii a typewritiugmai-bine.y the combii nation of a platen; a. shit'talde platen frame n which said platen is supported: a eariage truck with which said platen frame is connected; stops on said pl: ten frame; brackets. secured to said carriage truck, each of said brackets comprising oppositglgf' disposed walls; a stop adjustable i'ii one wall if each bracket, said last recited stop and l the other wall ot' the associate bracket being icoperative with one of the stops on said iplaten' frame; and means foi-varying the relation between the stop portions on each in which said platen is supported: a earriage truck with which said platen fraaie is connected; stops on said platen traine, ibrarkets on said carriage truck. sert-.ws seeach of said brackets comprising oppositely disposed walls; a stop adjustable iii one wall of each bracket.l said last recited stop and the other wall of the associate bracket being co'iperative with one of the stops on said platen frame; and screws in said carriage truck, one of said screws abutting each bracket and being adjustabiVx to `vary the relation between said bracket and said earriage truck.

l-l. Iii a typewriting machine, the combination of a platen; a twdpart platen carriage comprising a carriage truck and platen fianiethc two parts being pivotally eon nected; pivot members in one part coperatiiig-with bearings in the other part to enable one part to be turned on the other; screw bushings in which said pivot members slide;

lOll

nation of a platen; a sliiftable platen traine i curing said brackets to said carriage true-k,

iso.

for u per and lower case writing` connections tween said parts compristmgr spring- .lng portion. a head and a stem: covers et prising two parts. one shiftable on the other for upper and lower case writing. connecnation of a platen; a platen carriage comprising two parts. one shiftable on the other: connections between said parts comprising, vspringt-messed pivot memlx-rs: and means for l 'ings in the other part to enable one part to covers screwed on said bushings: and coiled l springs within said covers and cooperating with .said pivot members. In a typewriting machine. the combination of a platen; a two-part lvlaten carl rlage comprising a carriage truck and platen l frame. the two parts being pivotally conl neeted; pivot members in one part cooperi ating with bearings in the other part to enable one part to be turned on the other. each member comprising a pivot portion. a bearoperatingr with the heads of said pivot members: and springs coiled kon the stents andv housed within said covers.

1G. ln a typewriting machine. the combination of a platen a platen carriage comprising two parts pivotally eonneetedi and pivot members m one part cooperating with bearings in the other part to enable one part to be turned on the other. the construction and arrangement of said vpivot members beinj r such that theyv are movable longzitudinall).v to l engage and disengage their bearings and are rotatable on their own axes to a position in which they are maintained inoperative.

1T. ln a typewriting machine, the combination of a platen, a platen carriage comprising two parts` one shiftable on the other l l pressed pivot members by means of which one part of the carriage may be detached from the other. and means for locking said pivot members in releasing positions.

18. In a typewriting machine. the combination of a platen, a platen carriage comtionsV iet'ween said parts comprising pivoted arms. certain of the pivots for said arms being spring-pressed and iu the nature of :dined bolts that are movable to releasing positions to enable one part of the carriage to be detached from the other. and means for locking said spring pressed bolts in their releasing positions.

lit. In a typewriting machine. the combilocking said memlwrs in inoperative position so that one part of the carriage may be detached from the other` v 2t). ln a t'vpewriting machine, the combination of a platen: a platen carriage comprising two parts pivotally connected. pivot i members'in one part etiperatmg with iearbe turned on the other: srrewbushings in which said pivot members slide: covers screwed on said bushings: coiledsprings within said covers and cooperating with .said pivot members; caps on said members;

and portions on said covers cooperative with said. caps to maintain said members inoperative. l

21. ln a typewritin;r machine. the combination of a platen; a two-part platen carringe comprising a carriage truck and platen frame. the two parts being pivotally connected; pivot members in one part cotiperating with bearings in the other part to enable one part to beturned on the other, each member comprisingv a pivot portion, a bearing portion. a head and a stem: covers eooperating with the heads of said pivot niembers; springs coiled on the stems and housed within said covers: and caps on said stents cooperative with projections on said rovers to maintain said membeis inoperative.

22. In a type-writing machine, the combination of a platen; a platen carriage comprising a bar; a trough-like track-way, the inner walls whereoie are oppositely' grooved;

. wheels mounted at the sides of said bar and cooperative with said grooves; axles on said f wheels: ball-bearing cups adjustable on said carriage bar; and anti-friction balls in said cups. said balls cooperating with the axles of said wheels.

23. ln a typewriting machine, the combination of a platen; a platen carriage conv prising a bar: a tronghlike track-way, the inner walls whereof are oppositely grooved; wheels` mounted in ball bearings at the sides of said bar and cooperative with said grooves: means for adjusting said wheels.

'means for altering?r the relations between said wheels transversely of said bar.

In a typewritingr machine, the combination of a platen; a platen carriage comprising a bar: a trough-like track-way, the inner walls whereof are oppositely grooved; wheels at one side of said carriage bar eooperating with one of said grooves: a bracket secured at the other side of said bar; a wheel in said bracket cooperative withtbe other groove in the track-way; and means for adjusting said bracket to take tip-wear in the hearings. v

25'. ln a typewritingr machine, the combination of a platen: a platen carriage comprising.: a bar; a trough-like track-way, the inner walls whereof are oppositely grooved: ball bearing cups adjustable in one side of said carriage bar; anti-friction balls in said cups; wheels bearinr on said balls and cooperative with one of the grooves in said track-way; a bracket secured at the other side of said bar: ball cups adjustable on said bracket anti-friction balls in said cups; a wheel bearing on said balls and coperatinlgr with the other groove in tbe track-way; and means for adp1stin} r said bracket for taking np wear in the bearings of the carringe.

2G. [n a typewriting machine7 the combi-- nation of a platen; aplaten carriage comprising a bar; a trough-like track-way, the

inner walls whereof are oppositely groored;

a pair of wheels spaced apart at oncside of said carriage bar and cooperating with one of said grooves; and a wheel at he other side of said bar and midway between said pair of wheels, said last recited wheel c0- operating with the other groove in the trackway.

27. In a typewriting machine, the. combination of a platen; a platen carriage coniprising a bar; a trough-like track-way, the inner walls whereof are oppositel)` groorezl; sets of ball caps adjustable atV one side of Said carriage bar; a pair of wheels spaced apart and cooperating with one of said grooves, each of said wheels bearing in one of lsaid sets of ball cups; a bracket secured at the other side of said carriage bar and provided with adjustable ball cups; antirietion balls therein; a wheel bearing on said balls and cot'iperating with the other groove in said track-way. said wheel being disposed midway between the first named pair of wheels and said bracket being ad- 'nstable to take up wear in the. carriage,

earing.

2S. ln a typewritinglr machine.l the combination of a platen; a platen carriage; a carriage feed rack pivotally mounted on said carriage; a feed pinion on the frame of the machine with which said feed rat-li normally cooperates; means for giving rotary morenient to said feed raeli to disconnect it from said pinion to release the carriage; and

means for causing said feed rack to retingage with said pinion, tbe teeth of said feed rack being beveled on the reengaging side.

'29. ln a t \pewriting machine. the. eombi-` nation of aplaten; a platen carriage; a earriage feed rat-l; pivotallv mounted on said carriage; a feed pinion on the frame ot' the machine with which said feed rack normally coperates; means for giving rotariv movement to l said feed rack to disconnect it from said pinion to. release the carriage; and

means for causing said feed rack to rengage with said pinion, the teeth of said feed rack being beveled on the rengaging side. and the teeth of said feed pinion being beveled on the rengaging side.

30. 1n a ty iewriting machine. the combination of a platen; a platen carriage; pivot pins adjustably mounted on said carriage;

a carriage feed rack; detachable bearing members provided with bearing openings for receiving said pivot pins: and-means for securing said members to said feed rack. f

31. ln a. typewriting machine7 the. combi- 60 nation of a platen; a platen carriage; screw pins on said carriage; a carriage feed rack; bearings` suitably secured at the ends of said feed rack and cooperative with Said screw pins; a double finger piece secured on said feed rack; and a feed pinion normally co-l operative with said feed rack, said tinger piece being operative to swing said rack out of engagement with said pinion, one portion v of lsaid'tingcr piece being convenient for '10 manipulation when said carriage is in normal position and the other portion of Said linger piece beingr convenient for manipulation when the platen is raised to expose the, line of writing.

ln a typewriting machine, the combination of a platen; a platen carriage; a guide-way for said carriage secured on the frame of the machine7 and a spring-pressed stop mounted on said guide-way and adapt- -ed to cooperate with said earria e. to prevent the accidental withdrawal of the saine from its guide-way, said spring stop being constructed so that it. may bemoved to and locked in inoperative position to permit; of

the removal of said carriage from the machine.

33. ln a typewriting machine, the combination of a. platen; a platen carriage: a carria ge feed rael: pivoted on said carriage and adapted to be rotated about an axis which passes through the feed rack itself; a feed pinion with which Said rack normally meshes; and key actuated means for giving rotar \y movement tu said rat-liV to free it from said pinion` the releasing movement; of the rack being transverse of the, plane of rotation of the pinion7 the teeth of both said rack and said pinion being beveled at their ret'sngaging sides.

'Signed at the borough of Manhattan, city of 1New York, in the count)v of New York, and State of New -York, this 3d day of February, A. l). 19H6.

OSCAR 'UODW'ARD. W it messes:

l. M. 'nLLs, M. l". llixswnnnn.

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