US1489586A - Typewriting machine - Google Patents

Description

April 8 1924. 1 4 9,5

. E. E. BARNEY S TYPEWRITING MACHINE- Filed July 5, 1922' 2 Sheets-Sheet 1 STE-1 WITNESSES INVENTUR HIS ATTURNEY April 8 1924. r

E. E. BARNEY TYPEWRITING MACHINE Filed July 5, 1922 2Sheets-Shet 2 \NVENTDR wsw 213 6 044,

HIE ATTORNEY WgNEEEEE Patented Apr. 8, 1924.

UNITED STATES A 1,489,586 PATENT OFFICE.

EDWIN E. BARNEY, OF NEW ROCHELLE, YORK, ASSIGNON TO REMINGTON TYFE- WRITER COMPANY, OF ILION, NEW YORK, A. CORPORATION OF NEW YORK.

rxrizwnrrme Jar-mama Application filed July 3,

To all whom it may concern:

Be it known that I, ED'WIN E. BARNEY, citizen of the United States, and resident of New Rochelle, in the count of Westchester anistate of-New Yor have invented certain new and useful Improvements in Typewriting. Machines, of which the following is a specification.

My present invention relates to what are known as divided or s lit platen constructions for writing machines, and the principal object of the invention is to provide a new and improved construction of the character specified'whereby the mounting of the platens or sections is improved and the scope of their manipulation is enlarged so that the handling of work sheets of various kinds or'classes is facilitated.

To the above and other ends which will hereinafter appear, my present invention consists in the features of construction, combinations of devices and arrangements of parts to be hereinafter described and particularly pointed out in the claims. 1

In the accompanying drawings which illustrate the-preferred form of my invention,

Fi ure 1 is a fragmentary plan view of a Remington typewriter carriage and platen showing my invention applied thereto, the split platen being shown in longitudinal section. Figure 2 is a fragmentary side elevation taken from the left and drawn to a lar 1 scale, the view showing the line spacin evices associated with the left-hand p aten section.

Figure 3 is a erspective view of a cage or spider comprised in the platen release mechanism associated with the left-hand platen section.

Figure 4 is a transverse sectional view taken on a plane indicated by the section line 1-1 in Fig. 1 and looking in the direction of the arrows at said line.

Referring to the drawings, the platen carria e of the Remington machine, as is well un erstood, comprises a truck and a platen frame which is shift-ably supported on the truck. The truck, as appears from Figs. 1 and 2, is rectangular an comprises a front bar 1, a rear bar 2 and end bars 3 connecting the front and rear bars. In Fig. 1 it has been necessary owing to lack of space to show the front left-hand corner of the truck 1922. Serial No. 578,446.

displaced rightward from its'true position. The platen frame comprises end plates 4 and a connecting cross bar 5. The carria e travels on rollersyas 5, from side to si e of the machine. The platen frame is connected to the truck by devices comprisin hnks 6 which enable the frame to be shifte up and down on the truck in a known manner to change case.- The split or divided platen contrivance comprises two sections or platens, a left-hand section or art 7 and a right-hand section or part 8, t ese sections bein arranged coaxially, end to end. The leftand platen section 7 comprises a hollow core 9 of wood and an outer sheath or Lacket 10 of rubber secured to it, the core 1ng fitted over a tube or supporting device 11 which may be of brass, said tube extending through'the bores of both platen sections. The core 9 is fixedly secured to the tube as by a pin 12 which is driven through the core and into and through the tube, so that the core 9, sheath 10 and tube 11 always turn together. The right-hand platen section 8 comprises a core 13 which may be of brass tubing of considerably larger diameter than the tube 1.1. Which it surrounds, the tubes Hand 13 being coaxial. Fitted over and suitably secured to the tube or core 13 is an outer sheath or {)zzcket 14 of rubber or the like, said sheath mg coequal in diameter with the sheath 10 o the left-hand section, so that the ends of the two sections being contiguous they provide a practically continuous writing surface enab ing the sections to be employed as a single platen when desired as hereinafter more fully explained. In order to maintain the ri ht-hand section in proper relationship wit the inner tube or core 11 there is provided a collar or annulus 15 which is soldered or otherwise -secured to the tube 11 near its middle so that the lefthand end portion of the core 13 may rotatably bear on it, the outer diameter of the annulus bein such that the tube 13 has an eas bearing %t. Also at the right-hand end 0 the tube 13 there is secured within it as by soldering or in any other suitable way, a bushin or annular bearing member 16. Said bus ing projects somewhat beyond the right-hand end of the tube 11 and 1s undercut to provide a bearing surface or groove 16 at its inner or left-hand portion which fits over or receives the tube 11,

said tube having a bearing fit in the seat or depression 16 in the bushing. The construction is such that the inter-bearing of the right-hand platen section at its opposite end portions with the tube 11 avoids looseness or rattle between the right-hand section and its inner bearing. It will also be apparent that if the right-hand section comprising the hollow core 13 and the sheath 14: be held against turning, the lefthand platen section 7 comprising the core 9 and sheath 10, together with the tube 11, may be rotated independently ofthe righthand section, the right-hand portion of the tube 11 rotating within the hollow core 13. In order to take up impulses or thrusts arising during independent turning of the sections there may be provided devices which comprise hard rings or annuli 17 and 18 of suitable composition which are mounted on the tube 11 near its right-hand end and are spaced apart, being, confined between the inner end of the bushing 16 and a collar 19 fixed or otherwise secured to the tube 11. Between the two rings 17 and 18 is arranged a ball bearing com rising a set of balls 20 carried and controlled by an ordinary cage or other suitable device (n0t shown). The construction is such that the balls may co-operate with the hard rings to take up and distribute various impulses including thrusts communicated through the tube 11 from the left-hand platen section. Normally there is a space as indicated at 21 between the right-hand end of the tube 11 and the side face of the groove 16 to allow for endwise stresses or thrusts. A finishing device or thin annulus 22 may be inserted between the two platen sections so as to cover the joints of the constituent parts of said sections at their inner ends.

Suitable paper feeding devices are associated with the divided or split platen sections. In the drawing, main and secondary feed rollers are conventionally shown and numbered respectively 23 and 24, sections of these feed rollers extending lengthwise of the divided platen at its under side, certain of them being adapted to co-operate with the left-hand section 7 and certain others with the right-hand platen section 8. The two groups of feed rollerdevices may be controlled as an entity of separately as may be desired in order to advance or feed such work sheet or work sheets as may be introduced into the machine and over the whole platen or either of its parts or sections. The controlling devices may comprise a releasing rock shaft 23*- inounted on the end plates 4 and provided with a releasing arm, finger piece or key 23 which may be locked in release osition by a pivoted latch member 23", (l ig. 3).

In carrying out my invention 1 provide for controlling each platen section separateencased ly so that at will each section may be line spaced step by step by its own handactuated line spacing mechanism or may be line spaced fract-ionally as it is called, a set of platen releasing devices being provided in association with each set of line spacing.

mechanisms so as' to release thev associate platen section from the control of the line by line spacing mechanism enabling said section to be turned either through minute distances or fractions of line spaces on the one hand, or continuously to any desired extent by the usual platen finger wheel while disconnected from the step by step line spacing mechanism. Also there is provided coupling means which may be operated at will to connect and disconnect the two sec tions 7 and 8 of the platen, the sect-ions when connected providing in effect a single platen which may be line spaced either step by step or turned independently of the step by step mechanism. To these ends as above outlined, I preferably employ in connection with the right-hand platen section, line spacing mechanism and platen release mechanism of the character found in the Remington typewriting machine. These mechanisms are well known and do not require extended description here, no claim being made to them per se in the present case. Various details of the platen releasing mechanism for the right-hand platen section are disclosed in the patents to O. Woodward, 945,358, granted January 4, 1910, and E. H. Berry, 997,537, granted July 11, 1911, to which reference may be had for a more complete description than that found herein. The line spacing ratchet wheel 25 for the platen section 8 is provided with radial teeth and is arranged contiguous to the right-hand end of said platen section being mounted on a platen head 26 which is suitably secured in fixed relationship to the bushing 16 and is thus made fast to the platen section 8. The ratchet wheel 25 is rotatably mounted on an exterior circular bearing face of the head 26 and is prevented by an outer disk 27 from displacement therefrom when released or freed, The head 26 is-formed with two diametrically opposite slots indicated at 28 which receive clutch members each comprising a head portion 29 and an arm portion 30 which extends leftward within the tube 11 and terminates in a cam edge 31. The head portion of each clutch member is provided with a slot 32 which is adapted to co-opcratively engage with an internal flange 25 on the ratchet wheel 25. A flanged disk or cover plate 33 is interposed between the ratchet wheel and the end of the platen section 8 and is secured to the latter, said disk covering the clutch mechanism and giving a finished appearance tothe device. platen head 26 is provided with an inward had The

extension or hub 26 to which is screwed or otherwise secured a tube or housing 34 having a closed inner end. The hub 26 and the inner end of the tube 34 are apertured to permit of the passage of the right-hand platen axle or spindle 35/ The right-hand end of said axle projects beyond the platen head through a slotway 36 formed in the right-hand end bar 3 of the carriage truck,-

a similar slotway being provided in the left-hand end bar. Secured to the outer end of the axle 35 is a. finger wheel or twirler 37 of ordinary construction. posed -'portion of the axle carries the righthand one of a pair of bearing devices 38 which is adapted'to co-operate with stops at'the bottom and top of the slotwa 36, to limit case shifting movements 0 the platen on the carriage truck. The inner end of the axle 35 carries a cage 39 provided with rollers 40 to co-operate with the cam edges 31. The axle 35 is adapted to slide back and forth in its bearings but is keyed to the platen head 26 so that the axle and platen head are forced always to turn together. Normally the axle is maintained in the position shown in Fig. 1 by a spring (not shown) which is boiled around the axle and housed Within the tube 34. In the Fig. 1 position the rollers 40 acting on the cams 31 cause the slotted heads 29 to grip or clutch the flange 25?, and thus clutch the ratchet wheel 25 to the platen head 26 and the platen section 8, so as to force the section 8 to turn when the ratchet wheel is actuated. Theusual detent device coma prisin a spring arm 41 having a roller (not shown normally co-operates with the teeth of the ratchet wheel 25 and thus controls the right-hand platen section maintaining it in predetermined line positions and assisting to arrest the platen at the'end of its step by step movements under actuation oi the step by step line spacing mechanism. In order tofree the platen or disconnect it from the ratchet wheel 25 and detent 41 it is only necessary to push inward on the finger wheel 37, causing the axle or shaft 35 to inove longitudinally inward against its spring and carrying the rollers 40 out of effective co-operation with the cam ends 31 of the clutch devices 29. 30, causing said devices to release the ratchet wheel 25 so that if now the finger wheel 37 be turned it will correspondingly turn or rotate the platen section 8 independently of the ratchet wheel 25.

The step by step line spacing devices employed to co-opcrate with the ratchet wheel 25 whenit is clutched to the platen section 8 are of the ordinary Remington construction and comprise a pawl member 42 which is arranged at the front side of the ratchet wheel and is pivoted to a carrier arm 43 which is rotatably mounted coaxially with The exthe platen on a hollow bearing sleeve 4-4 fixed to the end plate 4 of the platen frame. The pawl member 42 is provided with an engaging tooth at its lower end and is connected by a link 45 with a bell crank 46, said bell crank being pivoted at 47 to a boss on the carriage truck. The link 45 is pivotally connected at 48 to the longer arm ot' said bell crank, the shorter arm thereof being pivotally connected by a wire link 49 with a. crank arm 50 which is secured by a screw 51 to the rear end of a rock shaft 52 that extends forward and terminates in a handle or finger piece 53. Said rock shaft is housed in a hollow bearing 54 which is fixed to the top portion of the right-hand truck bar 3, and also contains or houses a spring (not shown) by which the rock shaft and connected parts are restored to normal position and maintained therein. By actuating the line spacing handle 53 the train of devices comprising the rock shaft 52, link 49, bell crank 46, link 45, pawl member 42 and carrier arm 43 isoperated, causing the pawl member 42 to co-operate with the ratchet wheel 25'to turn it and the platen or section 8 through a linespace distance.

The platen releasing mechanism for the left-hand section or platen 7 is like that found in the Monarch typewriting machine,.

said mechanism with certain structural differences corresponding with that disclosed in the patents to H. N. Josleyn. 945.956, granted Jan. 11, 1910, and E. E. Barney, 954,912, granted Apr. 12, 1910. The lefthand line spacing ratchet wheel 55 is provided with external teeth 56 and internal teeth 57. Said ratchet wheel 55 bears rotatably on a. platen head 58 comprising a central flange 59. an outer head portion 60 formed with radial grooves. and an inner head portion 61 formed with circumferential grooves 62 (Figs. 1 and 3). 59 is prm'ided with holes which receive wood screws 63 that are threaded into the wooden core 9 and thus secure the platen head 58 in fixed relationship to the platen section'7. Slidably mounted in the grooves in the head portion 60 are locking teeth or toothed slides 64 which are beveled at their outer ends to engage with the internal teeth 57 ot' the ratchet wheel and-to maintain said ratchet wheel clutched to the platen head 58 and platen or section 7. As

best appears in Fig. 8 the grooved portion 61 of the platen head supports a cage or spider 65 which preferably is made of spring sheet metal and comprises a circular head 66 from which extend spring arms 67. three in number and terminating in angular engaging ends 68 that co-operate with the grooves 62 to maintain the cage 65 in place on the part 61. The arms 67 may be sprung outward readily to disengage the cage from the head. The cage provides a till.

bearing for wedging devices or slide pins 69 and has taken the place in the Monarch machine of a solid projection on the platen head as shown in the patents to myself and Josleyn aforesaid, the cage providing a cheaper and better construction. The platen core 9 and the left-hand end of the tube 11 are cut away to provide a space indicated at 70 (Fig. l) for the convenient reception of the cage and associate parts. The wedges or slide pins 69 extend in parallelism through the cage 65, their righthand end portions engaging in bearing openings in the cage head 66, the projecting ends being splayed or flattened as indicated at 71 so as to prevent undue leftward longitudinal displacement of the pins. Said pins bear in openings in the platen head 58 and at their left terminate in wedge shaped enlargements or cams 72 which engage with the inner ends of the slidable locking teeth 64 to maintain them pushed radially outward in operative engagement with the ratchet wheel 55. The cam pins 69 are normally maintained in operative position by coiled springs 73 which surround the pins within the cage 65 and react from the inner face of the head 66 against the right-hand ends of the wedges or cams 7 2, constantly tending to press or slide said pins left-ward in their bearings. The axle or shaft 74: of the left-hand platen section 7 extends part way through the tube 11, its inner end being provided with a cam or beveled end 7 5 for a purpose hereinafter described. Near its inner end the shaft bears in a support or hearing member 76 fixed in the tube 11 and provided with a beveled opening 76 through which the shaft 7% passes. Fixed to the member 76 and ex tending crosswise of the narrow portion of the opening 76 which it partly covers is a pin 76 square in cross-section which cooperates with a flat face 7? on the shaft 74 to prevent the shaft from turning withoutturning also the tube 11 and parts fixed thereto. The shaft 7 4 extends leftward through a hole indicated at 77 in the head 66 and bears in an opening indicated at 78 in the platen head 58 passing outward through the slotway 36 in the lefthand truck bar 3 and being provided at its outer end with a finger wheel or twirler 79 of ordinary construction, which is at all times adapted to turn the platen section 7 through the connection-comprising the shaft 74, pin. 76* and member 76. The left-hand bearing device 38 surrounds the left-hand portion of the axle 74 and cooperates with the stops at the bottom and top of the left-hand slot 36 in the carriage truck. it will be understood that the platen axles or shafts and 74 are normally sustained through, the devices 38 by the lower caw stops on the truck 1, 2,, 3, and that through said shafts the divided platen 7, 8 is likewise supported together with the platen frame, the end plates or bars 4.- of said frame being provided with bearings, (as at the right-hand side, the sleeve 44), which are engaged by the respective platen shafts 35 and 74, the mounting of the axles on the end plates 4 being such that the axles may freely turn therein and may also he slid eudwise therethrough. lVhen the platen and platen frame are shifted on the truck to change case, as indicated by dotted lines in Fig. 2, the platen and frame move up relatively to the truck. In order to release or disconnect the platen section 7 from the control of its line spacing ratchet wheel 55 there is provided a sleeve 80 having a head 81 formed with an internal circular cam edge 82. The sleeve 80 is slida-bly mounted on the shaft 74 outside the platen head 58 and is adapted to he slid inward or towards the right so as to press the slide pins 69 rightward against their springs, thgs freeing the slides 64- from the control of the wedge portions 72 of said pins 69. As the rightward movement of the sleeve 80 continues, itscam edge 82 will en age with projections 64* at the inner ends of the slides 61 and will cam or force all of said slides radially inward, thus freeing the platen section 7 from the. control of its ratchet wheel 55. The ratchet wheel is held against lateral displacement from its seat on the platen head 58 by an outer plate 83 which is provided with a dome portion 0 8% for housing various parts of the platen releasing mechanism, .said portion being formed with a hole to permit of free sliding movements of the sleeve 80. The outer teeth 56 of the ratchet wheel 55 are constantly engaged b a spring mounted roller detent 85 whic holds the platen when connected to the ratchet wheel and also '00- operates with said wheel to determine the extent of step by step or line spacing movements of the platen section 7. The releasing sleeve 80 is controlled by hand-actuated devices comprising a spring arm 86 having an eye-portion loosely surrounding the axle 74 and extending rearward, said aim being secured at 87 to the end plate 4. A. cam member 88 also pivoted to the end plate 4 is provided with a key or finger piece 89 and a cam edge 90, said member being adapted when rocked forward and downward to engage with its cam edge against the spring arm 86 to force the eye-portion of the latter rightward, overcoming the inherent spring of the arm and causing it to engage with and actuate the sleeve 80 to 1 release the platen section 7 as has been described.

The step by step which are employed for ratchet wheel 55 and turning line spacing devices, actuating the platen w section 7 through line space distances, embody modificz'itions of the usual Remington and Monarch line spacing devices, comprising as appears from Figs. 1 and 2 a pawl member 91 pivoted at 92 to a carrier 93 which surrounds the shaft 74 and is provided with a bearing coaxial therewith. The pawl member 91 is suspended from its pivot 92 and is provided at its lower end with a tooth 91" and at its upper end with an elongated hub 94. The tooth 91 is adapted to co-operate with the teeth 56 of the ratchet wheel The pivot 92 is a screw pivot with a nicked head 92 and an elongated body or shoulder portion which passes through the hub 94 of the pawl member 91. The reduced threaded portion of the screw pivot 92 receives outside of the carrier arm 93 a check nut 95 by which it is secured in place. The pawl member 91 and its rigid hub 9% are loosely confined between the head 92 of the screw pivot and the inner face of the carrier 93 so that the pawl member may freely turn pivotallv on the shoulder portion of the screw pivdt 92. A pin 91 carried by the member 91 co-operates with a hole 93 in the carrier to prevent undue relative movement between the parts. Said pawl member 91 has pivotally connected to it at 96 the rear end of a link 97 which extends forward and is bent or offset towards the left. the forward end of said link being pivotally connected at 99 to a goose neck crank arm 99. In Fig. 1 it has been necessary to show the forward portion of the link 97 to the right of its actual position. The crank arm 99 is in turn pivot-ally supported on a shoulder screw 100 mounted on a lug 101 projecting inward from the left-hand truck bar Between its own pivot 100 and its pivotal connection 99 with the link 97 said crank arm 99 has pivoted to it at 102 the lower end of an upwardly extending wire link 103, the upper end of said link being hooked through and thus pivotally connected to a crank arm 104 which extends inward or towards the right from a rock shaft 105 to the rear end of which said crank arm is secured by a screw 106 having a shoulder with flat sides over which fits a corresponding hole in the crank arm 104. The crank arm 99 in effect is a lever of the second order. The rock shaft 105 is supported on a U- shaped bracket 107 the cross portion of which rests on the left-hand truck bar 3 and issecured thereto by headed screws 108. The rear end of the rock shaft 105 is reduced as indicated at 105* providing a circulabearing face which engages in a bearing opening in the rear upright portion of thebracket. while the forward end portion of said rock shaft receives a shouldered bearing screw 109, the head of which co-operates with a bearing opening in the front upright portion of the bracket to provide a pivotal support for the forward end of the rock shaft 105. A spacing washer 107 is arranged on the shoulder screw 109 between the front end of the rock shaft and the adjacent face of the bracket 107. Integral with the rock shaft 105 is an upstanding arm 110 which provides a finger piece or line spacing handle. A coiled spring 111 surrounds the body portion .of the rock shaft and has one end secured thereto by a screw 112, the other end of the spring en-, gaging with the inside of the bracket 107 or truck bar 3, said spring maintaining the line spacing frame in normal position and restoring it thereto after actuation. A stop pin 113 co-operates with the crank arm 104:

to limit operative movement of the line spacing frame. \Vhen the line spacing haudle 110 is pushed or swung rightward it operates through the link 10?), crank arm or lever 99 and link 97 toactuate the pawl member 91, causing it to co-operate with the ratchet wheel 55 to turn the left-hand platen section through a line space distance.

Devices are provided for connecting and disconnecting the two platen sections 7 and 8 so that they may turn and operate as a single platen or may be operated separately or individually, said devices comprising clutch mechanism which is controlled by the cam at the inner end of the platen shaft 74. Said shaft may be pushed inward from the Fig. 1 position in order to actuate the clutch mechanism and render it operative to clutch the two platens 7 and 8 together. Any desired clutch mechanism may be employed, that. shown herein (Figs. 1 and 4) corresponding substantially with the mechanism disclosed in the patent to G. A. Seib.1,392,362. granted Oct. 4,1921. The cam end 75 of the shaft 74 is adapted to cooperate with a roller 114 which is received in a slot indicated at 115 formed at the end of the stem 116 of a T-shaped clutch lever which further comprises a head or cross portion 117 formed at right-angles to the stem. The ends of the slotted portions of the stem are curled to provide bearings for the roller pivot 118.. One end of the cross head 117 is provided with a stud 119 that bears in an opening in the tube 11, and the opposite end of the cross head passes through a slot indicated at 120 formed in said tube and fits into the split or space indicated at 121 between the ends of a split ring or collar 122. Said ring surrounds the tube 11 and is provided with a hole 123 whichreceives the projecting portion of the stud 119, thus roviding a further bearing for said stud which acts as a connection between the s lit ring 122 and the tube 11. the ring being oosely confined between the col lar 15 and a collar 124 which is suitably se cured to the tube 11 at the right by said split ring. Whenthe arts re disposed as in the drawing the sp it ring 122 engages loosely with or is free from the inner face of the tube or core 13, so that the platen sections 7 8, are free to turn independently of each other. However, when the linger wheel 79 is pushed inward towards the right, the shaft 74 will be moved longitudinally rightward and its beveled or cam end '75 co-opcrating with the roller ll f will cam the stem 116 to one side. This results in the turning of the lever 11?, 116 on the stud 119 as a pivot and causes the opposite end of the cross head 117 to turn so that its sides will. press against the ends of the split ring 122. The result will be to force. the ends apart, thus expanding the ring and causing it to engage frictionally with the tube or core 3, thus connecting or clutching the platen 8 to the platen 7. The friction between the roller 114 and the cam end 75 of the shaft will be sutlicient to maintain the parts of the clutch in eti'ective relationship as long as desired, thus maintaining the platen sec tions 7 and 8 connected so that step by step line spacing movements communicated through either of the line spacing mecha nisms will be effective to line space the two sections 7 and 8 as a whole. During such operations however it is desirable that the release mechanism at the opposite end of the divided platen be effected so that the ratchet wheel of the line spacing mechanism not in use may be disconnected. lVhen it is desired to disconnect the clutch device 122 it is only necessary to pull the tinger wheel 7 9 leftward until the parts are again in the Fig. 1 position. It will be noted that the longitudinal relationship of the two sections 7 and 8 is not affected by the actuation of the devices, including the split ring 122, whereby the two sections are adapted to be clutched or connected together.

It will be observed that by my present invention there is provided a divided platen construction, the sections whereof are so inter-related and mounted that they turn freely and yet are held against looseness or rattling. Also that means are provided for aiiording step by step line spacing of each section or platen separately, other means being provided for affording fractional line spacing of each platen or section separately; while if desired the platen sections may be connected or clutched together to provide a unitary structure which is also capable of being line spaced either step by step or fractionally as a single platen. The means for affording step by step line spacing of the two platens or sections comprise duplex sets of mechanisms which are separate and distinct so that they may be alternatively used, each of these sets being actuated by its own line spacing fin er piece or handle. These handles are in tfie present instance mounted in proximity to the outer ends of their associate platen sections on the non-shifting part of the carriage, and may be employed in both case positions of the platen to ,ettect step by step line spacing movements of the associate platen sections and also to restore the carriage with the divided platens from left to right to begin a new line of writing, a construction which will be fiound highly convenient. and effective. The means for att'ording fractional line spacing of the two platens or sections comprise duplex sets of platen releasing devices or mechanisms,

these sets being independent of each other so that they may be separately used at will att'eeting only their associate sections, each set comprising a finger piece which is arranged in proximity to the platen or section on which it operates.

Various changes may be made without dcparting from the spirit and scope of my present invention.

What l claim as new and desire to secure by Letters Iatent, is

1. In a typewriting machine, the combination of a platen. a carriage comprising a platen frame and a truck on which said platen and its frame are shiftable to change case, and means for line spacing said platen comprising two handles mounted on said truck near the op osite ends thereof and adapted alternative y to line space the platen in both of its shift positions.

2. In a typewriting machine, the combination of two platens arranged. end to end. ratchet wheels at the outer ends of said plat ens. means for coupling and uncoupling said platens. and line spacing devices co'operative with said ratchet wheels both when the platens are coupled and when they are uncoupled.

it. In a typewriting machine. the combination of two platens arranged end to end. ratchet wheels at the outer ends of said platens. means for coupling and uncoupling said platens. and line spacing devices co-operative with said ratchet wheels both when said platens are coupled and when they are uncoupled. said devices comprising line spacing handles disposed atthe opposite ends of said platens.

4. In a typewriting machine. the combination of two platens arranged end to end. means for coupling and uncoupling said platens and means for separately line spacing said platens step-by-step, said means comprising two line spacing handles. (lisposed at the opposite ends of said platens. both of said handles being etiective when said platens are coupled together.

5. In a typewriting machine. the combination of two platens arranged end to end. means for coupling said platens together so that they may be turned as'a single platen. and duplex means for line spacing said single platen, said means comprising two line spacing handles arranged near the 0ppositc ends of said single platen.

(3. In a typewriting machine, the combination of a divided platen comprising two seclions arranged end to end and provided with'separate axles, a carriage comprising a platen frame and atruck, said axles hearing in said platen frame and shiftably co-opcrating with said truck, and t'ains of devices for line acing said )laten sections, parts of each of said trains eing shiftable with said divided platen and said laten frame to change case, other parts 0 said trains supported on said truck maintaining the same positions in both shiftpositions of said platen.

T. In a t vpewrit-ing machine, the combination of a divided platen comprising two sections arranged end to end and provided with separate axles. a carriage comprising a platen frame and a truck, said axles bearing in said platen frame and shiftably co-opcrating with said truck, and trains of devices for line siacing said platen sections. parts of each of said trains being shiftable with said divided platen and said platen frame to change case, other parts of said trains comprising line spacing handles being mounted on said truck and maintaining the same-positions for both case shift positions of said divided platen and said platen frame. one of said handles extending upward from the front bar of said truck and the other extending downward therefrom.

8. In a typewriting machine. the combination of a divided platen. the sections whereof are arranged end to end, means for coupling said sections at will, paper feeding devices cooperative with said platen. and two sets of line spacing devices. one for each platen-section. each set being arranged at the outer end of the platen section with which it co-operates. and being also adapted to line space the two sections when they are coupled.

9. In a typewriting machine, the combination of a divided platen, the sections whereof are arranged end to end, paper feeding devices co-operative with said platen, two sets of line spacing devices, one for each platen section, and sets of platen releasing means. one for each platen section. each set of releasing means being controlled by devices in proximity to the. end of the platen section with which said set is associated.

10. In a typewriting machine, the combination of a divided platen. the sections whereof are arranged end to end. paper feeding devices co-operative with said platen. two sets of line spacing devices. one for each platen section. and sets of platen releasing means. one for each platen section, each set of releasing means comprising a finger piece disposed near the outer end of the platen section on which it is effective.

11. In a t-ypewriting machine, the combination of a divided platen provided with finger wheels, the sections whereof are arranged end to end. paper feeding devices co-operat-ive with said platen, two sets of line, spacing devices, one for'each platen section, and sets of platen releasing means, one for cach platen section. one of said releasing means being controlled by one of the platen finger wheels, the other set being cont-rolled by a separate kev.

12. In a typewriting machine, the combination of adivided platen'provided with finger wheels, the sections constituting said platen being arrangedcnd to end, clutch mechanism for connecting and disconnecting said sections paper feeding devices 00- operative with said platen, two sets of line spacing devices. one for each platen section, and sets ofplaten releasing means, one for each platen section. one of said releasing means being controlled by one of the platen finger wheels. the other set'bcing controlled by a separate key, the other platen finger wheel being effective to control the clutch mechanism.

1 3. In a typewriting machine. the combination of a divided platen comprising two sections. means for affording stcp-b v-step line spacing of each platen section, and means for afl'ording fractional line spacing of each platen section.

14. In a typewriting machine. the combination of a divided platen comprising two sections. means for affording step-by-step line spacing of each platen section including separate line spacing handles. and means for affording fractional line spacing of each section. said last recited means comprising separate finger pieces.

15. In a typewriting machine. the combination of a divided platen comprising two sections, means for affording step-by-step line spacing of each platen section including separate line spacing handles. means for afi'ording fractional line spacing of each section, said last recited means comprising separate finger pieces. and a. platen clutch for clutching and unclutching the platen section.

16. In a typewriting machine, the combination of a divided platen comprising two sections, means for atlording stcpbystep line spacing of each platen section. means for affording fractional line spacing of each platen section. and means for coupling and uncoupling the laten sections. the sections when coupled lieing adapted to be line spaced as a single platen either step-b v-step or fractionally.

17. In i typewriting machine, the combination of a sectional platen, means for affording step-by-step line spacing of each platen section including separate line spacing handles, and means for affording fraction-a1 line spacing of each section, said last recited means comprisin separate finger pieces, said finger pieces Iieing arranged in proximity to the outer ends of the platen sections on which they are effective.

18. In a typewriting machine, the combination of a platen, a line spacing ratchet wheel, and means for actuating said ratchet wheel comprising a pawl member, a pawl carrier, a lever of the second order, a link connecting said pawl member with said lever, a rock shaft rovided with a linger piece, and connections between said rock shaft and said lever.

19. In a typewriting machine, the combination of a platen, a line spacing ratchet wheel, and means for actuating said ratchet wheel comprising a pawl member, a pawl carrier, a lever of the second order. a link connecting said pawl member with said lever, a spring pressed rock shaft provided with a crank arm, a link connecting said rock shaft with said lever, and a handle or finger piece rigid with and upstanding from said rock shaft.

20. In a typewriting machine, the combination of a platen; a line spacing ratchet wheel; means for actuating said ratchet Wheel comprising a pawl member, a pawl carrier, a lever of the second order, a link connecting said pawl member with said lever, a rock shaft provided with a crank arm, a link connecting said rock shaft with said lever, and a handle or finger piece rigid with and upstanding from said rock shaft; and other line spacing mechanism adapted to operate said platen comprising a second ratchet wheel, a pawl carrier, a pawl memher, a bell crank, a link connecting said bell crank with said last mentioned pawl member and a rock shaft connected to said last recited link, said last mentioned rock shaft being provided with a downwardly extending finger piece or handle.

21. A divided platen for typewriting machines, comprising an inner tube, a core, a sheath, said core and said sheath being fixedly secured to said tube at one end portion thereof, a second tube surrounding said first tube at the opposite end portion thereof, a sheath fixed to said second tube, and bearport the 1,4se,see

ing means whereby each tube assists to supother.

A divided platen for typewriting inachines, comprising an inner tube, a core, a sheath, said core and said sheath being fixedly secured to said tube at one end portion thereof, a second tube surrounding said first tube at the opposite end portion there of, a sheath on said second tube, and devices comprising a ball bearing interposed between said first and second tubes, said tubes having an inter-bearing relationship.

23. In a typewriting machine, the combination of a divided platen for typewriting machines, comprising an inner tube, a core, a sheath, said core and said sheath being fixedly secured to said tube at one end portion thereof, a second tube surrounding said first tube at the opposite end portion thereof and having an inter-bearing relationship therewith, a sheath fixed to said second tube; and line spacing ratchet wheels normally maintained in fixed relationship with said tubes, said ratchet wheels being arranged in proximity, each to the outer end of its associate tube.

24. In a typewriting machine, the combination of a divided platen for typewriting machines, comprising an inner tube, a core, a sheath, saidcore and said sheath being fixedly secured to said tube at one end portion thereof, a second tube surrounding said first tube at the opposite end portion thereof and having an interbearing relationship therewith, a sheath fixed to said second tube, line spacing ratchet Wheels normally maintained in fixed relationship with one of each of said tubes, said ratchet wheels being arranged in' proximity, each to the outer end of its associate tube; and trains of line spacing devices co-operative with said ratchet wheels, each train comprising a line spacing handle or finger piece.

S gned at the borough of Manhattan, city of New York, in the county of New York, and State of New York, this 29th day of June, A. I). 1922.

EDIVIN F BARNEY.

Witnesses:

CHARLES E. SMITH,

E. M. WELLS.

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