US1462980A - Typewriting machine - Google Patents

Description

July 24, 1923. 1,462,980

M. w. Pool. y

TYPEWRITING MACHINE Filed May 19. 1921 4 sheets-sheet y14 M. W. Pool.

TYPEWRITING MACHINE Flled May 19 1921 A E 1W.

July 24, 1923.

M. W. POOL TYPEWRITING MACHINE Filed May 19. 1921 4 Sheets-Sheet' WITNEEEES July 24, 1923. l462,980

M. w. POOL TYPEWRITING MACHINE Filed May 19. 1921 4 sheets-sheet 4 m :l l M NQ@ Juil V m wg WITNEEEES Patented .luigi 24, i923.

narran sraras man@ earner eric.

HOBBIES W. POOL, OF BROOKLYN, NEW YORK, AS-SIGrNOR TO REMINGTON TYPEWRITER COMPANY, OF ILION, NEW YORK, A CORPORATION 0F NEW YORK.

TYPEWRITING MACHN Application filed May 19, 1921. -Serial N9. 470,818.

To all whom it may concern.'

Be it known that I, MORRIS YV. POOL, citizen of the United States, and resident of the borough of Brooklyn, city of New York, in the county of Kings and State of New York, havel invented certainnew and useful Improvements in Typewriting Machines, of which the following is a specification.

My invention relates to typewriting machines and its general object is to provide a typewriting machine which is particularly adapted to the production of certain styles of commercial typewriting.

To the above and vother ends my presen invention consists in the features of construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out 'in the claims.

l have found'it convenient. to embody the principles of my present invention in a machine of the character of that disclosed in the application of Clio B. Yaw, Sr. No. 321,864, filed September 5, 1919, and in a restricted sense my invention may be said to relate to improvements on the Yaw machine. Said machine is a front strike machine that embodies a ltraveling carriage which holds the work sheet ina-substantially fiat position in a vertical plane. The

. work sheet being arranged at the back of the carriage, it'. was found desirable to mount the machine vpivotally so that said machine as a whole could be swung or dropped downward and forward in order to afford convenient access to the back of the carriage for enabling the 'wo'rk sheet to be manipulated or adjusted. ,By the present invention, the type carrying and work holder elements, which have an unvarying or constant normal relationship in a .direction fore and aft of the machine, but

are made relatively movable so that they may be spread or separated to provide a temporary gap or space suiiicient to enable the operator to adjust the work sheet or sheets at the front side of the vertically disposed work holder o'r .paper assembling element. After such adjustment the type carrying and work holder elements may be pushed close together or otherwise brought back to normal relationship to enable printing .operations to be carried out. It is believed that this general idea is new in connection with front strike typewriting devised for facilitating collating work or fan fold work. i

In the accompanying drawings which illustrate my invention- Flgures 1 and 2 are respectively the front and rear portions of a front to rear vertical sectional view of af typewriting machine embodying my invention, the carriage however being shown in end elevation. i

Figure 3 is a fragmentary rear elevation of the carriage of the machine.

Figure 4 is a fragmentary horizontal sectional view taken on a plane indicated by the dotted line 1--1 in Fig. 2 and looking downward in the direction of the arrow at said line.l

Figure 5 is a fragmentary end view showing the upper part of the carriage, certain of the parts appearing in different relationships from those illustrated in Fig. 2.

, Figure 6 is a fragmentary perspectiveY F igu're 7 is a fragmentary rear elevation of a modified construction of carriage and mounting. A

Figure 8 is a fragmentary end elevation of the carriage illustrated in Fig. 7.

Figure 9 is a horizontal sectional view taken on a lane indicated by the dotted line 2-2 in ig 8 and looking downward in the direction of the arrow at said line. F ig. 9, however, being drawn to a larger scale than Fig. 8. v

Figure 10 is a fragmentary end View of the modified carriage construction drawn to a larger scale than Figs. 7 and 8.

Figure 11 is a fragmentary detail View. Referring first to the construction shown in Figs. 1-6, the main frame of the machine comprises a. base portion l, side plates 2 secured to the base, and a topplate 5v surmounting the side plates. The main frame contains and supports the type bar system, ribbon mechanism, escapement mechanism, parts of the tabulating mechanism and other appurtenances all of which are preferably of the construction disclosed in the Iaforesaid Yaw application and need be but briefly described. The type bars 7 are of the front strike variety, the set of type bars being arranged in an arc of -a circle and titi pivotally mounted on a pivot wire 8 which is supported on an inclined type bar support or segment 9 secured to the side plates 2. The type bars are arranged in guide slots 10 formed in the segment 9 and are normally supported near their free vends by a curved type bar rest 12 having at its ends depending arms 13 that are secured to the top plate 5. lEach type bar is formed with a' cam slot 14 by whichtit -is connected with a train of actuating devices comprising a pin 15 engaging in said slot and projecting laterally from the upwardly extending arm 16 of a bell crank lever which also comprises a short arm 17. Said bell crank is pivoted on a pivot wire 18 common to all of the bell cranks and mounted on a stationary support 19 providedwith slots 20 in which the bell cranks are received. Links 21 connect the short arms 17 of the bell cranks with key levers 22, thesystem of key levers being pivoted in the rear of the base on a common pivotal support 23 each lever being provided with a key cap 24. said caps being ar' ranged as usual on angularly arranged stem portions 22a that project upward from the body portions of the key levers 22, the keyboard thus being provided at the front of the main frame. The type bars 7 are each provided with a single type but it is of course to be understood that if desired they may be provided with a plurality of types and associated with suitable case shifting mechanism for bringing desired types into use. The types are adapted to print through the printing portion of a ribbon 25 which is threadedy through and controlled by a vibrator 28 guided in stationary guideways 29. PThe ribbon 25 is wound on spools, not shown, which are alternatively connectible with a horizontally arranged ribbon driving shaft 30 which is rotatable by the spring drum mechanism of the machine through a train of devices comprising a beveled pinion 31 on said shaft 30, said pinion meshing with a beveled pinion 32 which is rigid with a ratchet wheel 33 that is impelled by a spring pressed pawl 34. The vibrator 28 normally maintains the printing portion o'f the ribbon below the printing point but at each type bar actuation is vibrated upward to interpose the ribbon between the actuated type bar and the printing face of the platen, the platen and its carrier involving a novel construction of paper carrying element to be hereinafter described. The escapement mechanism comprises a rack 35 mounted 'on the paper carrying element and formed with forwardly projecting teeth with which intermesh the teeth of a feed pinion 38 secured to the upper end portion of a vertically disposed shaft 39 which at its lowerend carries a toothed escapement4 wheel 40. The shaft 39 is mounted in a spring pressed frame 41 having pivots 42 projecting from incasso a block 43 secured by screws 44 to an angle bar 45 fixed by screws 46 to the sides of the base 1. rThe spring pressed frame 41 normally maintains the feed pinion engaged withthe feed rack 35. Adapted to oo -opcrate with the escapement wheel 40 are escapement dogs 47 and 48 mounted 'on a dog rocker 49 which is fixed to the middle portion of a rock shaft 54 by a `set screw 55. The rock shaft has xed pivots and near its ends is provided with downwardly inclined arms 56 which are connected beneath I the key levers 22 by a universal bar or rod 57 which the key levers depress during., printing operations, causing vibration of the dog rocker and coaction of the dogs and es'- capementwheel as is usual'to permit stepby-step feeding movements of the carriage under the control of motor or main spring mechanism hereinafter described, said universal bar 57 also having connections with the ribbon vibrator 28.

Mounted on the main frame are ltabulating devices com rising a key lever-arm 58- fixed to the rig t-hand end portion of a rock shaft 59 extending transversely of the base,fsaid arm 58 extending upward and forward and being provided with a tabulator key, not shown. Fixed to the middle portion of the rock shaft 59 is a rearwardly extending arm or stop member 64 that cooperates with tabulator stops on the carriage as hereinafter described. Also fixed to the rock shaft at the right of the arm 64 is van upwardly extending arm 65 that is pivotally connected at 66 to a rod 67 that extends rearward and passes through a hole in a finger 68 secured to the rocking frame 41 by screws 69. The rear end of the rod 67 is threaded and receives an adjustable nut that co-operates with the back of the finger or extension 68 to swing said arm on its pivots 42 when the tabulator key is actuated,

thus causing a separation of the pinion 38 from the rack 35 and automatically releaslng the carriage.

Referring now to the construction andA mounting of the work carrying element or."

traveling carriage, the base l is provided with rearwardly extending portions 1a which are connected by an angular cross portion or web 1b. Fixed to the top of the cross portion by headed screws 71 is a transverse cross bar 72 formed on its upper side withv a y groove indicated at 73, the grooved .part providing the lower guide rail or trackway for the carriage (Figs. 2, 3 and 4). rranged on the frame part 1" behind the guide rail 72 and near the ends thereof are a pair of posts or uprights 74, said posts being secured in place by headed screws 75 which are threaded upward through the frame part or web 1b into the posts. The upper end portions of the posts 74 are connected by a cross bar 7 6 which is secured to the posts by headed screws 77 received in depressions 78 in the rear faces of the posts. The under face of the cross bar 76 is formed with a V groove indicated at 79, said bar providing the upper trackway for the travelingl carriage, which in the present construction comprises two main parts, a truck and a platen carrier, said two parts being mounted for relative movement. The carriage truck comprises two uprights 80 angular in cross section and connected by a cross frame or yoke 81 which may be formed with triangular openings or cutouts indicated at 82 for the sake of lightness, the end portions of the yoke receiving screws 83 which ixedly secure the yoke and the uprights 80 together. Arranged behind the truck and extending crosswise of the marights 80 by headed screws 86. Roller devices 87 are received in the grooves of the I stationary 1guide rails 72 and 76 and cooperate wit the grooved bars 84 and 85 on the carriage truck to provide roller bearings for said truck whereby it is enabled to be moved and guided back and forth from side to side of the machine with a minimum of Jfriction. Thetruck is prevented from being accidentally withdrawn or displaced from its bearings by stop devices comprising a stop plate 88 provided with a stop projection 89, said plate being secured by screws' 90 to the inclined rear face of the cross bar 84. The sides of the stop projection 89 are adapted to co-operate with marginal stops 91 which are adjustably mounted on a toothed margin stop bar 92 provided'with angularly disposed end portions 93 which seat in depressions in theinner walls of the posts 74 and receive headed screws 94 which are threaded into the posts and securethe stop bar 92' thereto. By adjustment of the stops 91 along the bar 92 the length of the printing line is controlled as desired, the faces of the carriage stop 88, 89 co-operating with the stops 91 to limit the back and forth traveling movements of the carriage, and correspondingly limiting the length of the printing line. Near their lower ends each side of the uprights 80 is formed with forward projections or extensions 80 having inturned end portions 80b which are connected by the carriage rack 35, said rack being secured to the end portions 80b by headed screws 95, said rack 35 meshing with the feed pinion 38 and thus connecting the carriage with the escapement mechanism whereby it is normally controlled. The carriage is constantly urged toward the left by motor or spring drum mechanism comprising a circular casin or drum 96 which encloses a main spring 9 connected at one end to the casing 96 and at the other end to a stationary part. The spring drum is provided with a central pivot 98 which bears on a. station projectingportion 80a. Through the band 100 the spring drum acts constantly to urge the carriagetoward the left, this movement being controlled ordinarily by the escapement or carriage feeding devices. The ribbon driving pawl 34, together with the ratchet 33 with which it co-operates and the beveled pinion 32, may be mounted on the top of the spring drum casing 96 as appears from Fig'. 2. -A tabulator rack bar 103 is secured by screws 104 to the side portions of the uprights 80 near their lower ends and receives one or lmore adjustable tabulator stops 105 which vhave downwardly extending stop faces 106 adapted for co-operation with the'rear end of the arm 64, said arm at the stop portion 106 of the tabulator stop Y or stops, so that when the tabulating mechanism is operated the end of the arm 64 will' be swung upward into the path of said stop portions. In addition to the truck and its appurtenances hereinbefore described as constituting one of the'main parts of the car riage said carriage comprises a second main part or platen carrier which is'mounted on the truck by a system of links which enables the platen carrier to be moved relatively to the truck. Said platen carrier, as shown. in Figs. 2, 3, 4 and 6, comprises'a pair of parallel uprights 107 which are angular in cross section and are .connected by a tab1e-like member or plate 108, the parts being suitably secured together as by rivets 109 passing through the side edges of the plate 108 and through the front portions of the uprights 107. In elfect, therev is thus provided an upright paper supporting plate or table having parallel rearwardlyfe'xtend ing side edge portions angularly disposed to the front surface of thev plate which lies in a'. substantially vertical plane transverse of the machine. F or connecting the member 107, 108 with the truck there arevprgovided two pairs of links 110, the lower pair and upper pair of said links being horizontally disposed and being pivotally connectward ends receiving the threaded portions of thescrews 112, the pivotal or threaded portions 'of said screws 112 co-operating with the sides of the uprights 107. The frame 107, 108 is maintained normally related to tlietruclr, as illustrated in F ig. 2, by pins 113 projectinglat/erally outward from the sides of the upper links 110 and engaging lugs 114 formed on'the side portions of the uprights 80. Although the table or plate 108 may, if desired, be suitably faced and itself employed as the printingv surfacev or platen *somewhat after the manner of the modified construction, it is preferred to employ a separate part to receive the type impressions, said part being constituted by a round platen 115 of ordinary construction which is arranged behind theplate 108 and projects forward through an opening or slot-way 116 in said plate so that the printing face'at the front side of said platen is substantially in the front vertical lane of said plate; or otherwise expressed, t e plate is tangential of the printing face of the platen. The platen 115 is provided with heads 117 having hubs 118 secured by set screws 119 to stub shafts or axles 120 which bear in openings formed in the side faces of the uprights 107. The outwardly projecting portlons of the stud shafts 120 receive finger wheels or twirlers 121 having hubs122 which receive set screws 123 whereby the finger wheels are secured to the shafts 120. Mounted on the right-hand shaft `120 outside the ratchet whee 124 provided with a hub 125 which yreceives a set screw 126 whereby the ratchet wheel is secured to the shaft 120. A

roller detent 127 carried by a spring arm 128 fixed b screws 129to the right-hand upright 10 co-.operates with the ratchet wheel to maintain the platen against accidental rotation. Line spacing turning move-- ments may be communicate to the platen by line spacing devices of suit-able construction comprising a pa-wl 130 co-operative with lthe teeth ofthe wheel 124; or when desired'` the platen may receive rotary or line space' rollers 131 disposed' near the `ends of the laten opposite the printing line thereon. aid rollers are rovided with pintles 132 and are received 1n the slotted end portions of fingers 133, the ends of the fingers at the sides of the slots being curled tov providev laten headis a line f's/pacing.

reeaeeo bearings for lthe pintles 132. The ngers 133 are provided with outward extensions 133*l termina-ting in rearwardly bent end portions 133b`which are pivoted at 134 in brackets 135 secured to the sides of the plate 108.' Coiled springs 136 are hooked in the end portions 133" and at their opposite ends are anchored to pins 137 projecting from the sides of the uprights 1,07. Said springs 136 act as drawsprings and tend constantly to'y maintain the rollers 131 in cci-operative engagement with the front face of theplaten 115. To control the lower end portions of the work sheets there may be provided angularguide arms 138 of wire comprising inwardly bent vpaper engaging guide iingers 139 normally contactive with the lower portion of the front face of the plate 108. The guide arms 138 extend downward and realward outside thel plate 108 and at their rear' ends are offset inward and flattened as indicated at 140 to receive rivets 141 which secure the guide arms to the uprights 80. The arms 138 are s0 arranged that normally their vfinger portions 139 press lightly against the plate holder 108. The upper links 110 areprovided with projections or lugs 142which7are adapted to co-operate with laterali,-projections 143 on the paper fingers in order'rto effect an automatic releasing of `said fingers when. the platen carrier is moved on the truck backward to inoperativey ,position as referred to hereinafter more in lenffth. Springfingers or detents 144 secured screws 144a to'thetop of the uprights 80 are adapted to co-operate with the' pins 113 to hold the its inoperative position. Slde lfuides 145 of any/*suitable construction may be secured to the plate 108 at its side to cooperate with laten carrier in t-he ed es of thework sheets'during adjustment t ereof on the plate 108.

i Releasing devices mounted on the `carriage truck-,comprise a cross rod 146 extending transversely of the machine and arranged behind the inger 68, said'cross rod being mounted on downwardly inclined arms 147 pivoted at 148 to the sides of the extension 80a, the arms 147 and crossrod 1/46 constituting a releasing bail which isf/adapted to be thrown lforward against the linger 68 to swing the frame 41 on its pivots'and move the Lfeed pinion 38 forward out 0f mesh with the rack 35. To this end the left-hand arm 147 is rovided with a rearward extension 149 wh1ch is connected by an upright link 150 with a release lrey'151 pivoted at 152 tol "the l/ eft-hand upright 80.

A coiled 'spring 153v connected to a pin 154 on the arm 149 and anchored at its other end to a pin 155 projecting from the upright 80 tends constantly to maintain t-he arm 149 in contact with a stop pin 156. When therelease key 151 is depressed the link 150 is raised, swinging up the arm'1'49 and rocking the bail 147, 146 so that it acts against the finger 68 to disconnect the feed pinion 38 from the feed rack 35 as described, thus releasing the carriage so that it may be moved yfreely from side to side of the machine. Such move-ment it will be understood does not affect the link 67 and connected parts which operate to release the carriage automaticallcy when the tabulating mechanism is operate At such time the arm 65swings lforward causing the rod 67 to pull against the finger 68 to transmit a releasing movement to the frame 41.

1t will be observed from Fig. 2 that when the work-receiving plate or paper holder mechanism 108 and the rearwardly striking printing instrumentalities or mechanism are in normal relationship, the frame or'supe port of the printing instrumentalities is close to the face ofthe table .so that work j sheets may not be conveniently adjusted preliminary to writing. In order to afford sufficient room for such preliminary adjusto ment the operator moves or swings the holder or collating plate 107, 108 from normal vposition upward and rearward on the links 110 to the Fig. 5 position, this abnormal position also being indicated in Fig. 2 wherein the dot-and-dash line represents the front face of the table 108 when in its retracted or abnormal position. Comparing the two positions of the plate it will be observed that in the present instance they are parallel, this being due to the parallel linkage systemwhich provides for a so-called parallel motion of the plate in passing from its normal toits abnormal position and vice versa.,

This is a desirable construction but is not, of course, essential in so far as the broader principles of the invention are concerned.`

Furthermore it will be noted that the bodily relationship of the platen and the paper holder or plate 108 is the same in both positions, such relationship being constant. This movement of the plate or table may be conveniently effected by finger pieces 157 riveted to the uprights 107 at opposite sides of the table, said finger pieces being preferably so shaped that the work sheets as they are fed upward or line spaced step-bystep may pass behind the front portions of said finger pieces which will clip or guide said sheets and prevent them from falling forward and downward where they might interfere with the Operation of the machine. During the backward movement or retraction of the table the lugs 142, acting against the projections 143, will 4automatically swing the paper ngers 133 and rolls 131 forward about-the pivots 134 away from the platen, thus rendering them inoperative and the line spacing means ineffective to advance the paper. Also the backward movement of the table will Separate it from the paper engaging portions 139 of the guides 138 which have anl unvarying position on the carriage truck. The swinging table and the-parts carried by it will be maintained in the abnormal or Fig. 5 position by the engagement of the pin 113 with the detent springs 144. It will be observed that as a result of the increased space between or separation of the work-receiving and printing -instruinentalities bothrearward and upward there is provided' a comparatively wide gap or space between the two and also that the front or work-receiving surface of the table besides being raised has been left unobstructed by the paper controlling devices that normally co-operate 'with it. 1n other words, the face of the plate 0r table is automatically cleared of obstructions and at the same time it is so positioned that there'` is plenty of space in front of it and behind and above the type bar frame or support to enable the operator to adjust the work sheets against or upon said plate. All 'that the operator has to do is to apply the usual or desired paper or work sheets that are to be collated to the front face of the plate or holder, to adjust or collate said. paper or sheets either solely by the eye or with assistance of suitable scale or indicating devices, and then to swing the plate forward and downward to normal position, the paper feeding and controlling devices automatically engaging with the collated sheets'to maintain them in adjusted positions. Clips such as 157 may if desired effect a preliminary holding of i the adjusted sheets prior to return movements of the plate. Thereafter the writing may be proceeded with, impressions being made on the outer sheet of'paper (indicated in the drawings at a) through the ribbon 25, and on the underlying sheet or sheets c through the usualA carbon sheet I) or other transfer medium. Between lines the work sheets are fed upward step-by-step over the table by the co-operation of the platen with the feed rolls 131 through actuation of the platen line spacing devices.

. The construction disclosed in Figs. 1-6 inclusive is particularly adapted for use in connection wit-h separate sheets of ordinary length in what is commonly termed collating work. Figs 7-11 inclusive illustrate a modification of the invention adapted especiallyfor use with continuous sheets which sometimes comprise several plies folded along their longitudinal edges to provide what is usually termed a fan-fold sheet. In the modied construction angular posts each comprising a horizontal portion 158 and an i upright port-ion 159 are secured to the base byl screws 160. Arranged forward of the horizontal portions 158 of the angular posts is a guide rail 161 which rests on the top of the rear portion of the base 1 and may be properly secured thereto. Screws 162 secure the outer end portions of the guide rail 161 lower end of said platen.

to the angular posts and assist in additionally supportin said posts from said rail 161. The upper en portions of the uprights 159 are connected by an upper guide 'rail 163 which is secured to the posts by screws 164. |lfhe carriage truck is similar in construction to the truck of the Fig. 1-6 construction and comprises uprights and a cross frame or web 166 to which the uprights are secured by screws 167. Upper and lower guide rails 168 and 169 arranged behind and transversely of the truck are suitably secured thereto and cooperate through rollers 170 and 171 with the fixed guide' rails 163 and 161. The. construction provides roller bearings for the carriage which vin addition to the truck comprises a platen carrying frame, the latterl including a pair of parallel uprights 172 and suitable cross connections 172, said frame being connected by a linkage system comprising four arallel links 173 with the-carriage truck. he links are similar in construction and arrangement to the links in the liig. 6 construction each being pivotally connected at its rear at 1711 with the truck uprights 165, the front ends of said links bein connected at 175 with the uprights 172. e truck and the platen carrying frame are maintained in normal relationship by studs or pinsl 176 projecting from the upper links 173 and normally co-/ operating with'stop faces or lugs 177 on the uprights 165. The uprights 172 guide and support a slidable flatplaten or paper controller 179, comprising a backing of metal suitably faced and provided with suitable devices for clamping the work sheet in a flat condition to its front face so that as said platen is slid or fed upward step-by-step it will line space the paper that is carried or supported on it in an upright condition behind the rearwardly striking type bars. The side edges of the line feeding member 179 are guided between the frontfianges of the uprights 172 and guide strips 180 secured to saiduprights. For holding the paper on the flat platen as described a pair of parallel spring pressed clamping jaws 17 9L and 179b may be provided near the top of the platen, while `guides 179- may be provided near the For communicating liney feeding movements to the upright paper holdervor platen 179 means are provided comprising upright rack bars 181 secured to the rear face thereof, said rack bars intermeshingwith gear wheels 182 fixed to a shaft 183 bearing at its ends in the uprights 172. Mounted on said shaft near its right-hand end is a line spacing ratchet wheel 1841 havin a hub 185 screwed fast t0 said shaft. A etent pawl 186 co-operates with ratchet wheel 184 to prevent backward turning movements of said wheel as well as of the. shaft 183 and the parts mounted thereon. Loosely mounted on said Shaft neaaeeo and confined between the ratchet wheel 184 and the adjacent gear wheel 182 is a pawl carrier 187 towhich is pivotally connected a pawl 188, said pawl being connected by lin s 189 with a crank arm190 fixed to a 70 rock shaft 191 which rocks in a bearing 192 secured to the right-hand upright 172. The rock shaft 191 extends forward and is provided with the usual line spacing handle or finger piece which when actuated rocks the 75 shaft 191, swinging the crank arm 190, this movement being communicated through the link 189 to the pawl 188, causingsaid pawl to engage with and actuate the ratchet wheel 184 and communicating a movement 8 of rotation to said ratchet wheel. rllhis movement in turn is transmittedfthrough the gear wheels 182 to the racks 181 andpaper holder or platen 17 9, said platen being thereby moved upward through a unit of line 85 spacing distance and advancing or carrying upward with it the work sheet, said sheet 1n the resent instance being illustrated as a'fanold sheet and designated by the numeral 193.A The fan-fold sheet is led up- 9 ward at the front side of the paper controller over a trough-like guiding device comprising an inclined body portion 194, side portions 195 andtabs 196 which receive screws 197 whereby! the trough or paper 95 guide is/ixedly secured to the bar 169 of the truck. rlhe trough-like guide thus underlies the upright platen or paper controller and is adapted to guide the advance of the work sheet 193 from behind the machine to 100 the front of theplaten at its Ilower end.

lt will be understood that during the letter feeding movements the truck of the machine together with the trough-like guide and the platen carrier and platen, will move 105. from side to side through the full length of the rinting line, carrying with. them the fanold sheet 193, the extended guideways 163 and llpermitting such movements to take place freely and without obstruction. 110 Also it will be apparent that the platen carrier comprising t e uprights 172 and all of the parts mounted onsaid platen carrier including the platen may be swung upward and rearward away lfrom the printing in- 115 strumentalities as in the first described construction, thus providing a gap or space, comparatively wide, to enable the operator conveniently to manipulate the paper at the front side of the carriage and platen. When 120 the platen or paper controller 17 9 has been moved upward, step-by-step or line by line, until a section of the multiplex or fan-fold sheet 193 has been completed, the sheet may be released from the clamping device 179, 125 17 9b and the laten in turn may be released so that it wi slide downward on the carrier uprights 172 under the influence of gravity to nurmalr osition. To this end there 1s secured to t e pivot 198 of the dela tent pawl 186 a. forwardly extending arm or key piece 199 which is constantly ur ed upward by a drawspring 200, said sprmg having an eifect of tending to maintain the detent pawl 186 engaged with the ratchet wheel 184. When it is desired to release the paper controller the key `199 is depressed, swinging the pawl 186 out of the ratchet wheel 184, thus freeing the shaft 183 and permitting the gear wheels 182 to turn backward allowing the platen and its clamping jaws to slide down to normal position of gravity. Stops 201 may limit the downward movement.

Of course the forms of the invent-ion illustrated ma be employed with work sheets ofstyles different from those illustrated.

l Various modifications besides those illustrated may be made without departing fro-m the invention.

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

1. In a typewriting machine, the combination with a front strike printing mechanism, of means for holding the paper opposite the printing point and for providing a backing for the paper when the printing mechanism is operated, said means and said printing mechanism having an unvarying normal relationship in a fore and aft direction but being relatively separable, the elements composing said holding and backing means remaining unaffected when such separation takes place.

2. In a typewriting machine, the combination with a front strike printing mechanism, of means for holding the paper opposite the printing point and for providing a backing for the paper when the printing mechanism is operated, said means and said printing mechanism having a constant normal relationship in a fore and aft direction but being relatively separable to afford a temporary gap between the two elements, and devices for separating said means from said printing mechanism, said holding-and backing means being moved as a. whole to abnormal position without any relative change among its parts.

Y3. In a typewriting machine, the combination of a front strike printing mechanism, a platen, a paper support, said printing mechanism aving an unvarying. normal relationship with said platen and said paper support in a direction fore and aft of the machine, and means for moving said platen and said paper support together to abnormal position away from said printing mechanism to vafford a temporary gap to facilitate the adjustment of the paper, the relationship of the platen and the paper support being the same in both abnormal and normal positions.

4. Iny a typewriting machine, the combination of a front strike printing mechanism,

.an upright flat paper holder in the rear thereof, means for moving the two relatively to abnormal position for paper adjustment, means for maintaining .at will the abnormal relationship between said printing mechanism and said -paper holder.

5. In a typewriting machine, the combination of a front strike printing mechanism, a paper controlling mechanism comprising an upright paper holder and a platen both arranged behind said printing mechanism, and means for aording relative separation between said two mechanisms, the bodily relationship between said paper holder and said platen being constant, and means for adjusting vvthe paper in flat condition against said holder, the paper being maintained thus adjusted when the normal relationship between the printing mechanism and said holder is restored. i

6. In a typewriting machine, the combination of a flat rigid paper holder provided with an opening, a round platen extending in said opening and arranged so that the tangent to its printing face is substantially coincident with the surface of said flat paper holder, and printing -instrumentalities cooperative with said platen.

7. In a typewriting machine, the combination of a flat paper plate providedf with a slot, a round platen extending in said slot and so disposed that the tangent to its printing face is substantially coincident with the surface of said flat paper plate, paper feeding devices co-operative with said platen to advance paper over said plate, and printing mechanism.

8. In a typewriting machine, the combina, tion of a flat paper plate provided with an opening, a, round platen extending in said opening and so th'at the tangent to its printing face is substantially coincident with the surface of said fiat paper plate, paper feeding devices co-operative with said platen, and paper guiding devices cO-operative with said holder. 9. In a typewriting machine, the combination of a round platen, a collating plate having a constant bodily relationship with said platen, printing,instrumentalities, and means for-affording relative separation between the platen and collating plate on the one hand and the printing instrumentalities on the other to rovide room for the convenient adjustment of work sheets on said collating plate.

10. In a front strike typewriting machine, the combination of front strike type bars, a support therefor, a round platen, a substantially upright collating plate having a constant bodily relationship with said platen, and means for moving said platen and said collating plate away from said typebars and their support to provide an increased space for the convenient adjustment of work sheets on the front face of said collating plate.

therefor, aper carria e mechanism, a platen nation of printing carriage eeding mec anism partly on said support and partly on said carriage, and means for affording a relative separation between said platen and said support without disconnectin the parts of said carriage eedin mec anism.

13. n a front strike typewriting machine, the combination of an upright Hat work-receiving surface, printing mechanism, and means for moving said flat surface upward and away from said printing mechanism to provide a gap between them without substantially disturbing the relative uprightness of said work-receiving surface.

14. In a typewriting machine, the combination with a rinting element and a work carrying uprig t plate, of means for elevating said plate and moving it further away from said printing element to increase the space or gap between them providing a space wherein the work sheets may bel conveniently manipulated.

15. In a front strike typewriting machine, the combination of a vertically disposed collating plate, key operated front strike type bars arranged at the front side of said collating plate, and means providing for the spreading apart of the collating plate and the type bars in order to provide a comparatively wide gap or space in front of the c'ollating plate so that work sheets may be varrzltnged against the` front surface of said p ate.

16.v ln a typewriting machine, the combiinstrumentalities, aV platen, a paper assembling plate associated with said platen, and means for aordin relative movement between the platen and the paper controlling plate on one handand the printing instrumentalities on the other hand, so as to provide a comparatively wide gap or space between the relatively moved parts, said platen and said plate having the same bodily relationship after such relative movement as before it takes place.

17. In a front strike typewriting machine, the combination of a vertically disposed col- 'lating plate, a support therefor, key operated front strike type bars arranged forincasso ward of said collating'plate, a type bar support, and means provldmg for the spreading apart of said two supports to widen the ap or space at the front of the collating p ate so that work sheets maybe conveniently arranged on the front faceof said plate.

18. ln a front strike typewriting machine, thev combination of an upright workreceiving plate, printing mechanism, means for affording relative movement between said work-receiving late and said printing mechanism .toprovi e a gap between them without disturbing the'relative uprightness of said work-receiving plate, and paper controlling means co-operative with said workreceiving plate.

. 19. lin a front strike typewriting machine,v the combination of a Hat uprightwork-receivin support, printing mechanism, means for fa ording relative movement between said dat support and said printing mechanism to provide a gap between them, and means for advancing work sheets over said fiat slipport.'

20. 1n a front strike typewriting machine, the combination 'ot a dat upright work-receiving support, printing mechanism, means for affording relative' movement between said support and said printing mechanism to provide a gap between them, and means for advancing work sheets over said support, said last recited means being rendered automatically ineffective by said first recited means. y

21. lin a typewriting machine, the combi- 100 nation of a platen, a paper receiving surface .for holding the paper in a flat condition opposite the printing face of the platen, printing instrumentalities, and means for moving said platen and said surface together bodily 105 away from the printing instrumentalities to provide an increased gap or space for the convenientl adjustment of the paper on said surface and relative to theV platen.

22. In a front strike typewriting machine, 1h10 A thecombination of a fiat paper plate for supporting work sheets in printing position, printin mechanism, means for line spacing f the wor shects,' and means for affording relative movement between said plate and said i printing mechanism to increase the space between them without substantially disturbing the angular position of said plate.

23. ln a front strike typewriting machine, the combination of a flat paper' plate for 1120 supporting work sheets in printing position, printing mechanism, means for` line spacing the work sheets, and means for affording relative movement between said plate and said printing mechanism to increase the space between them without substantially disturbing the angular position of saidl plate, said last recited means operating automatically to render said line spacing means ineective, reo

24e. In a typewriting machine, the combination of a platen, a paper receiving plate for holding the paper in a flat condition opposite the printing face of the platen, line spacing devices, paper feeding devices, printing instrumcntalit-ies, and means for moving said platen and said plate together bodily away from the printing instrumentalities, said means operating automatically to move said paper feeding means relatively to the platen to inoperative position.

ln a typewriting machine, the combination of a round platen, a paper plate, pivotally mounted paper feed rolls, spring means for maintaining said rolls inco-operative engagement with the platen, printing instrmnentalities, and means for moving said platen and said paper plate bodily away from the platen and at the same time overcoming said spring means and swinging` said feed rolls on their pivots out of contact with the platen.

26. In a typewriting machine, the combination of printing instrumentalities, a carriage truck, roller bearings for said truck, a platen carrier, a platen thereon, a paper plate for holding the paper in flat condition opposite the printing point, and a linkage system connecting said platen carrier with said truck.

27. In a typewriting machine, the combination of printing instrumentalities, a carriage truck, a platen carrier, and links connecting said carrier with said truck and enabling said carrier to be moved backward by a parallel motion away fromsaid printing instrumentalities.

28. ln a front strike typewriting machine, the combination of a set of rearwardly operating type bars, a carriage truck, roller bearings therefor, a platen carrier, links connecting said carrier with said truck, .a

platen on said carrier, and a paper supporting plate constantly tangential to the printing face of said platen.

29. In a front strike typewriting machine,

the combination of aset of rearwardly operating type bars, a carriage truck, roller bearings therefor, a platen carrier. links connecting said carrier with said truck, a platen on said carrier, a paper supporting plate constantly tangential to the printing face of said platen, paper feeding devices operative with said platen, and paper guiding devices co-operative. with said plate.

30.- In a front strike typewriting machine, the combination of a set of rearwardly operating type bars, a carriage truck, roller bearings therefor, a platen carrier, links connectingsaid carrier with said truck, a platen on said carrier, a paper supporting plate constantly tangential to the printing face of said platen, paper feeding devices mounted on said platen carrier and co-operative with said platen, and paper controlling devices mounted on said truck and co-operative with said paper plate.

31ln a typewriting machine, the combination of print-ing instrumentalities, a plate for supporting a work sheet in flat condition, paper controlling devices co-operative with said plate, and means for movlng the printing instrumentalities and plate apart and for automatically clearing the `paper receiving face of said plate.

Si ned at the borough of Manhattan, city of ew York, in the county of New York and State of New York, this 18th day of May, A. D. 1921.

MORRIS w. PooL. Witnesses E. M. WELLS, L. NELSON.

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