US1475619A - Typewriting machine - Google Patents

Description

Nov. 27, 1923. 1,475,619

E. E. BARNEY TYPEWRITING MACHINE Filed March so. 1921 4 Sheets-Sheet 1 INVENTUR "W HIS ATTDRNEY WITNESSES wn Nov. 27 1923. 1,475,619

E. E. BARNEY TYPEWRITING MACHINE Filed March 30 1921 4 Sheets-Sheet 2 S WITNESSES INVENTUR 94%; gm Spam- N HIE ATTORNEY Nov. 27 1923.

E. E. BARNEY TYPEWRITING MACHINE Filed March 30 1921 4 Sheets-Sheet 5 WITNESSES 'HIS ATTUHNEY E. E. BARNEY TYPEWRITING momma Nov. 27 1923.

Filed March so. 1921 4 Sheets-Sheet 4 INVENTEIR {MX.W r

ii 4, Hi5 ATTURNEY WITNESSES Patented Nov. 27, 1923.

UNITED STATES. PATENT dF'F'lfC'E.

EDWIN n; annnnv, orrr'nw"aocHELI;n; YORK, hSLS'iIGNbR TG Re atriation TYPE- wRrrnncoMPnfNY, OF'IIJION, NEW'YORK', Award-Ramon on NEW YORK.

TYPEW RIT'ING trimaran.

chief objects of said invention are to provide" new and improved mechanism for feeding the ribbon and for reversing the ribbon:

feeding mechanism or so controlling it as to reverse the direction in which the ribbon is fed. Other objects of the invention willappear hereinafter.

To the above ends my invention consists in the features of construction, combinations of devices and arrangements of parts hereinafter described, and particularly pointed out in the claims. The )rcferred form of my present,1nventiou is illustrated-1n the accompanying drawings, wherein Figure 1 is a fragmentary f ont to rear vertical sectional view of a typewriting machine embodying my invention, only so much of the machine being. shown as is necessary to a complete understanding of said invention.

Figure 2 1s a fragmentary horlzontal sectional view taken on a plane indicated by the dotted line 11 in Fig. 1 and looking downward in the direction of the arrow at said line, said Fig. 2 being drawn'to a larger scale than Fig. 1.

Figure 8 is a fragmentaiy vertical sectional view taken on a plane indicated by the dotted line 2-Q-in Fig. 2- and lookingintaken 011* a plane indicated" by the dotted line 4-4 in Fig. 4: and looking downward.

Figure 6 is a fragmentary sectional view' Application filed March 30; 192 1. Serial No'. 456,907.

Figure 7 is a fragmentary front to rear vertical sectional view ta kenon planes indicated by the dotted line 5--5- inFig. 4- and look-ing'towards the 'left in the direction of the arrow at said-line.

Figure 8 is a fragmentary view illustrating some ofthe parts shown'in Fig. '5 but drawn to a larger scale.

Figure the a perspective view Sl10Wl11g OIl6 ofthe ribbon spool'shaft-s and parts" or pieces associated therewith, the parts being spread or separated to-promote clearness' and drawnto a somewhat larger scalethan the main VleWS. V

Figure 10 is aperspective view of a de tachable unitor element comprisingsomeof the ribbon feeding and reversing devices for one of the ribbonspools and the casting or bracket on which'said' devices are supported or mounted, said figure being drawn to the same scale as Fig. 9, p 1

Figure 11 is an enlarged vertical sectional view ofa detail;

Figure 12 is a plan= view illi'istrating the lifting spring: for the ribbon spool.

As appears from Figs. 1 andl, themain frame of the machine comprises side plates 1, w crossplate2-connectingthe side plates atthe rear, a"U shap'ed fraineB whereby the keyboard'is enclosed, and'top'plate sections 4. Above the main frame: isarrange'd a platen 5, diagrammatically illustrated, the platen being: mounted on a carriage (not shown) that is" adapted for movement or travel from side to side of the machine under the control of suitable mechanism. Printing key levers 6 are provided with keys 7 and are fulcrumed'on' rods S 'mOunted on a' sub-frame'fl that isdetachabl y secured to the main frame, the key levers being seated in parallel guide'slot's cut in the front and reap portions of said sub-frame. The key levers areprov'ided each witha slot 10 engaged by a projection or pin 11 on an angular lever 12 fulcrumed at 13 onsaid subframe 9: said angular lever being connected by a link 14; with'the short downwa1"dly'e:'- tending arm of abell crank 15 fulcrume'd at 16 on a support-17. The longerarm' of said bell crank 15 extends horizontally rearward and" carriesa pin 18 which engages in a cam slot 19 formed" in a} type bar 20 pivoted on a curved fulcrumwire 21 which is secured to an upright type bar support" or segment 22, said segment being formed with radial slots 28 in which the set of type bars 20 are received and guided. Normally the type bars extend horizontally forward from their pivots and rest against a pad 24 mounted on the support 17, said support being suitably connected with the type bar segment 22 so that it may be shifted with the segment to vary the case position of the type bars, the case shift bein effected by suitable mechanism such, for example, as that disclosed in the pending joint application of myself and John H. Barr, Sr. No. 408,780, filed August 16, 1920. The type bars when their associate lreys 7 are depressed will. be caused to cooperate with the front or printing face of the platen 5.

Each top plate section 4 is cut out or formed with an opening indicated at 25 which is bounded by an upturned edging or flange 26, the top edges of the two flanges being inclined upward and inward towards each other as will be understood from Fig. 4. The flanges 26 provide housings or cups for ribbon spools 27, each ribbon spool comprising two parallel heads or flanges 28 and a core piece 29, the flanges being provided centrally with holes which co-operate with a shaft hereinafter described. it ribbon 30 is wound on the ribbon spools, and from each of the spools said ribbon is led inward toward the printing point through a slotway 31 in the housing 26. The ribbon spools are inclined generally in accordance with their housings, that is, they are inclined upward and inward towards each other, so that the ribbon as it is led ofi from the spools through the slots 81 may extend rearward and upward in straight paths or lines without bending or twisting, to co operate with the ribbon vibrator, which normally maintains the upper edge of the printing portion of the ribbon higher than the points at which the upper edge of the ribbon leaves the ribbon, spools. The inclined planes of the ribbon spools extend upwardly and inwardly towards the middle. of the machine and would if prolonged intersect substantially at-a fore-and-aft vertical plane passing through the printing point. In other words, planes perpendicular to the ribbon spool axes intersect substantially in the aforesaid vertical plane passing through the printing point. Said vibrator or carrier designated as a whole by the numeral 32 and best shown in Figs. 1 and 4 is arranged in a transverse plane behind the ribbon spools and comprises abody portion 33, a stem. 34 and pairs of fingers 35 and 36 arranged to provide slots or guide-openings indicated at 37. The ribbon is threaded through the vibrator passing through the slots '37, the printing portion of said ribbon being that portion which is exposed between the guide slots. The side portions of the vibrator cooperate with an H-sha-ped guide member 88, the lower arms whereof are bent rearward and secured to a stationary part of the machine. A type guide 39 is secured to the front face of the segment 22, the vibrator being loosely confined between said type guide and a cross portion of the H-shaped guide 38. The vibrator stem'34 is pivotally connected with and supported by the forward end of an operating arm 40 comprised in the ribbon vibrating mechanism, which mechanism is not herein fully shown but preferably corresponds with the tonstruction disclosed in the application of John H. Barr, Sr. No. 404,721 filed August 20, 1920.

Each ribbon spool 27 is detachably mounted on the upper end portion 41 of a short spool shaft or stub-shaft 42 that is inclined from its lower end outwardly towards the adjacent side of the machine, as appears from Figs. 1 and 4. The stub-shaft is supported on. a detachable bracket or casting designated as a whole by the numeral 43 and best shown in Figs. 1, 4, 5 and 10. There are two of these brackets or castings arranged one at each side of the machine inside the side plates to which said brackets are secured by pairs of screws 44 passing through the side plates and threaded into tapped holes indicated at- 45 in the upper plate-like portions of the brackets 43. Each bracket comprises an inclined body portion 46 and projections 47 and 48, said projections extending inward at right-angles from the body portion 46 near its top and bottom. The upper projections 47 are plate like in form and each is provided near its inner end witl an enlargement or boss 49 perforated as indicated at 50 to provide a bearing opening for the lower portion of the associate ribbon spool shaft Q. The lower or body portion of each spool or stub-shaft 42 is of lesser diameter than the upper portion 41 with which the spool is associated, said shaft being adapted to turn freely in its bearing opening 50 but being held from moving endwise by a spring latch (Figs. 4 and 10). Said latch is in the form of an angular leaf spring 51 secured at its upper end by screws to the top of the extension 4." and thence extending downward and below the boss 49, said spring latch 51 terminating at its lower end in a horizontal portion or eye 51 which is adapted to co-operate with an annular groove 53 formed in the shaft 42 near its lower end, the shaft below said groove being rounded off as indicated at 42. The spring inherent in the latch 51 tends constantly to rarry or force the eye portion 51 thereof inward towards the middle of the machine, the construction being such that the outer portion of said eye is thus maintained engaged in the groove 53 in the associate spool shaft 42. thus latching the shaft or holding it against endwise movement in its bearing permitting the withdrawal or detachment of the shafts 42 and the parts mounted orsupported thereon. These parts include for each shaft, as has been stated, the ribbon spool 27 itself, said spoolbeing detachably secured to the portion .41. of the shaft by devices comprising a latch or lever 54 (Figs. 4 and9). Said latch is arranged inaslot or cutaway indicated at 55 formed in-theshaft portion 41, the pivot 56- of said latch bridging said slot. The upper end portion of the slot 55 passes completely through the-head ofthe shaftportion41 and receives, as is common, lugs 28 projecting inward from the central hole in the upper flange of the associate ribbon spool, the spool andshaft thus being interlocked so that the spool is forced to participate in all rotary movements of the shaft. The lower end or .arm of the latch 54 terminates in a nose 54 which cooperates with the lower flange 28 of the ribbon spoolnearthe edge of the central hole therein to prevent upward displacement of the spool. Said nose is maintained in operative position by a coiledspring 57 acting against the lower arm of the la'tch, it being necessary, in ordento effect detachment of the spool to press the upper end of the latch 54 in opposition to, the spring 57 to cause the .nose 54 to release the ribbon spool. The upper end of the spool shaft is rounded or. somewhat pointed'to facilitate re-engagement with the holes in the flanges 28 so that the spool may bereadily replaced on its shaft after removal. Likewise, the pointed or rounded lower end 42 of the spool shaft facilitates replacement of said shaft in its bearing and re-engagement with the spring eye 51 after the shafthas been detached for any purpose. Attached to the stub-shaft 41, 42 below the ribbon spool, for which in effect it provides aseat or support, is a circular plate 58 secured to the top face whereof is a liftingspring 59 (Fig. 12).

-The outer end of said spring is riveted or otherwise fixed to the plate 58 and the inner end is bifurcated or forked soaspartly .to embrace the shaft portion 41, the-free ends of the bifurcated portions 60 terminating substantially in a line which passes through the axis of said shaft so that the spring action may be axial of the spool shaft preventing binding of the spool against the side of its shaft. The inherent tendency of the free end portion of the spring 59, 60 is to rise or spring away from the plate 58, the

spring normally pressing ,against the bottom of the ribbon spool and maintaining the lower flange thereof contactively engaged with the nose 54 0f the latch 54. When shaft and remove it from the cup.

said latch is operated to release the ribbon spool the spring 59, 60 becomes effective to lift the spool far enough to carry its upper flange above the topedge of the cup or housing-26, thus enabling the operator readily to grasp the spool, detach it from its Non nally, as will be understood from Fig. 4, the top of the spool is below the upper edge of the cup .and the spool flange lits comparatively closely or snugly in the cup, this construction and arrangement conducing to a finished and attractive appearance of the parts. However, without some means for lifting the spool or tending to move it in a direction tocarryv it off its shaft when it is unlatched, it would be difficult with such a construction as the present one to get hold of the spool and remove it. The lifting spring 59, 60 provides a suitable and effec .tive means for automatically accomplishing this function and facilitating the removal operation.

Preferably, the plate or disk 58 is mounted on the spool shafts 41, 42 in the following manner: The disk 58 is formed with a central opening designated by the numeral 61 (Fig. 9) by which it is fitted over the hub 62 of a small gear wheel 63 that is comprised in the ribbonfeeding mechanism. A pin 64 passing through thehub and through a transverse hole in the ribbon spool shaft secures the gear wheel, as wellas the disk or supporting plate 58, permanently fixed thereto. The upper end of the hub may be formed witha circumferential groove 65. the hole 61 enabling the disk 58 to fit in said groove and the. portion of the hub 62 above the groove being thereafter spread or upset, thus fixing thedisk 58 in rigid relationship with the hub. The gear wheel63 constantly intermeshes with a smaller gear wheel or pinion 66 which is suitably fixed to the upper end of afeed shaft 67 (Figs. 1,4 and '10). he two shafts thus being provided with toothed connections. Said feed shaft is upright viewed from thesideand near its upper end bears ,in the plate-like projection 47, said feed shaft near its lower end bearing in the projection 48, both projections being formed with suitable bearing openings. The lower projection 48 is slotted as indicated at 68 to receive a collar 69 which fits over the shaft and isfixedly secured thereto by a set screw 70. The collar may turn freely in the slot 68 when the shaft is rotated but will cooperate with the top and bottom of the slot to prevent endwise displacement of the shaft 67. Each feed shaft 67 carries at its lower end a beveled pinion 71, said pinion being supported on the shaft below the bearing 48 and beingfixed in place by a set screw 72. It will be observed from Fig. 4 that the shafts 67 incline inward and downward from the-sides of the machine in parallelism with the ribbon spool or counter shafts 41, 12 so that the beveled pinions 71, as well as the intermeshing gear wheels 66 and 83, are somewhat inclined to the horizontal.

The beveled pinions Y1 are adapted to cooperate with beveled driving pinions or gear wheels 73 which are mounted on a ribbon driving or power shaft 74., said shaft being horizontally disposed and arranged in the lower part of the main frame. Each driving pinion 73 is perforated to fit ovethe extended sleeve or hub portion 75 oi? a worm T6 comprised in the ribbon reversing mechanism to be hereinafter describec. The ends of the sleeves opposite from the worms Y6 are provided with narrow slots or keris "Z7 (Figs. 1 and 1), and each driving pinion 73 receives a set screw 78 which abuts against the slotted end of the sle re 25 cent pressing or crushing the same against the driving shaft, the construction enabling the set screw to secure pinion 73, worm menr ber 75, 7G and shaft Te: in fined relationship. The driving shaft '1: bears, near its in bushings 79 which are supported side plates 1 and held oy set screws 8( shaft beingadapted to rotate in'i bushings or bearings and also bein L of endwise movement therein to a extent. The driving pinions 'Z are posed along the shatt "i4 that they 2 ed for alternative engagement witl'i their sociate be eled pinions T that when one of said (raving pinio operative the other pinion is inopera F or example, as appears from Fig. l, w the left-hand driving pinion 78 is operativ engaged or intermeshed with its associs pinion 71, the right-hand driving pinion 3 is some distance to the left 0' and out oi mesh with its associate pinion and conse quently the turning movement or the drivmg shaft 7% will be transmitted to the lefthand ribbon spool, causing the ribbon to wind thereon, corresponding amounts being drawn or unwound from the tree righthand. ribbon. spool. In order to reverse the feeding of the ribbon the shaft 74 is moved endwise or longitudinally toward the right as hereinafter explained in detail, causing the left-hand driving pinion 73 to disengage from its associate pinion 71 while at the same time effecting an engagement of the right-hand driving pinion 73 with the right-hand associate pinion 71.

The ribbon driving shaft 7% is automatically turned to "feed the ribbon by impulses communicated by the printing hey levers through a train of devices (illustrated in Figs. 1, 4t, 7 and 8) next to be described. Said train of devices includes a shaft '81 arranged below and parallel with the shaft 74, said shaft 81 being supported on brackets or bearing blocks 82 which extend down-- ward from the sides of the subdrame 9 and are secured to the under faces thereof by screws 83. The brackets 82 are perforated to accommodate flanged bushings 8 L in which the end portions of the shaft 81 bear, said bushings being fixed in place by set screws 85. A collar 86 pinned or otherwise secured to the left end portion of shaft 81, projecting beyond the left end bracket 82, prevents undue displacement of the shaft 81 towards the right, while a corresponding collar 87, pinned to the outwardly projecting right-hand end portion of the shaft- 81 prevents endwise displacement towards the left. The collar 87 may be, and in the present instance is, a hub portion of a crank arm or a pawl-carrying member 88. Arranged on the shaft 81 near its ends, but inside the brackets 82, are a pair of parallel crank arms 89 which are provided with hubs 90 that it over the shaft 81 and are suitably fixed thereto as by pins 91. The crank arms 89 extend or incline upward and forward being connected at their free ends by channel or cross bar 92 which is arranged in an inclined position and is adapted to be operated from noses or contacting portions 6 of the printing key levers ('3. Each time one of the printing key levers is actuated it not only causes a printing op eration of the connected type bar but also actuates the cross bar 92 which serves as a universal bar both for the ribbon feeding ni -han sin and also for the ribbon vibrat mechanism, one form of the latter nievhanisin bein fully disclosed in the aforesaid application of John H. Barr, Fir. To. 4.9%,721 filed August 20, 1920.

Contining ourselves herein to the ribbon feeding mechanism, it will be apparent that when a printing key 7' is depressed the nose or its key lever will move rearward contacting with the universal bar 92 and swinging the latter towards the rear, thereby communicating a limited extent of turning or rotary movement to the shaft 81, and swinging upward the crank arm SSiiXed to the right-hand end portion of said shaft. Said crank arm is somewhat angular in shape and extends in a general forward direction, providing a support for two pawl members 93 and 9d pivoted respectively on studs 95 and 96 carried by the arm or support 88, the stud or pivotal center 95 being at or near the outer free end 01" said arm while the stud or pivotal center 96 is not far from the axis of said arm 88. At their outer free ends the pawl members 93 and 9st terminate in laterally bent engaging or toothed portions numbered respectively 93 and 9-1. Said pawl members are provided with perforated oil-sets 97 and 98 through which are hooked the ends of a coiled spring 99, said spring constantly tending to swing said members toward each other about their pivots. Pivotal movements of the members are limited shifted endwise as later des-ribed.

by lateral projections or stops 100 and 101 which co-operate respectively with cutouts or rectangular openings 102 and 103 in the support 88, the sides of said openings providing stop faces with which the stop devices 101 contact to limit turning movements of their respective pawl members in both directions. The pawl teeth .3 and 94 co-operate with the teeth of a ratchet wheel 10 1 mounted on the ribbon driving shaft T l near its right-hand end, and are long enough to maintain their engagement with said ratchet in both positions to which it may be moved when the shaft '74; is The ribbon driving ratchet wheel 101 is preferably of considerable diameter, it having been found in practice that a 2:; inch ratchet wheel provided with approximately one hundred and eighty ratchet teeth gives de sired results. The ratchet Wheel may be cut out at intervals leaving spokes 105 and centrally perforated to receive a hub 106, the two parts being suitably secured together and the hub fitting over the shaft 7 1 to which it and its wheel are fixed by a set screw 107. The pawl member 93 is substantially upright and its pawl tooth 93 engages with the forward side of the ratchet wheel 10 1, while the pawl member 91, arranged behind the pawl member 93, has its tooth 9 1 engaging with the under side of the ratchet wheel. The parts are so disposed that when the crank arm or support 88 is swung upward at a printing operation as has been described, the pawl tooth 93 will co-operate with the ratchet teeth to turn the ratchet wheel 10% to a limited extent in the direction of the arrows (Figs. 7- and 8), this movement being participated in by the ribbon driving shaft 7 1 and its driving pinions 73. The engaged one of said pinions. which may be assumed to be the left hand pinion, as illustrated in Fig. 1. will transmit movement to its associate beveled pinion '71. which in turn will effect a rotation of the upstanding shaft 07. causing the inion 66 at the upper end of the said shaft to turn its associate gear wheel 63, thereby effecting a reduced rotary movement of the spool or counter shaft 41. 12 and the ribbon spool which it carries, said spool turning to wind a portion of the ribbon thereon. advancing the unwound portion of the ribbon leftward and altering to some extent the printingportion of the ribbon whi h is to receive the next type impres 'sion. It will be understood that at this time the right-hand ribbon spool is free or loose and will turn to permit the ribbon to be drawn off under the pull received from the winding-on spool at the left. The tooth 9 1 acts as a detent or holding pawl to prevent backward rotation of the ratchet wheel and to hold or maintain-the advance of said ratchet wheel received from the impulses of the tooth 93 which acts as a feed or driving pawl. It will further be understood that at each printing operation an impulse will be communicated to the train of ribbon feeding mechanism in the manner described, the result being that the ribbon will be automatically fed or advanced longitudinally past the printing point from one ribbon spool to the other; and that this automatic feed or longitudinal advan e of the ribbon may be continued for the full length of the ribbon. In addition, if for any reason it be desired to feed or advance the ribbon continuously, this may be done byliand by a movement communicated to the driving shaft 7-61 independently of the operation of the printing keys. For this purpose a crank arm 108 is secured to the right hand end of the driving shaft 74 which projects outside the side plate 1 by a headed screw 109. Said crank arm is provided at its free end with a laterally projecting headed stud 110 on which is mounted a suitable finger piece or handle 111 and the rotation thereof will cause corresponding turning movements of the shaft 7-1 and of the connected ribbon spool as will be readily under stood.

The automatic ribbon reversing mechanism is control ed by plies of the ribbon and is designed to operate when substantially all of the ribbon has unwound from one of the ribbon spools leaving it empty. Said mechan sm comprises, as shown in Figs. .1, 5, 9 and 11, a. device or finger designated as a whole by the nun'iera-l. 112, said device preferably being made of sheet metal and comprising a body portion 113 terminating at the upper end in an inwardly curved tip 11-1l and two laterally bent parallel side portions 115, both of said side portions terminating at their upper ends in outwardly turned tabs 116, one of said side portions 115 being provided at its lower end with a nose 1.17. The device or member 112 is arranged in a slot-way or opening indicated at 118 formed in the circular plate 58, the sides of said opening being provided with downwardly bent ears 119 which receive and support a pivot pin 120 on which the member 112 is pivoted the side portions 115 having perforations near their lower ends to bear rotatably on said pivot pins 120. Between the side portions 115 is arranged a wire spring 121 which comprises a. tree portion and the side portions 115, the construction being such that the looped portion 121 of the spring is maintained in engagement with the bottom edge of the body portion 113 and at right-angles with the body portion 113 of said member 112, as well as to the ribbon spool shaft with. which said memher is adapted to be n'laintained in substantial parallelism by the inner plies of the ribbon. lVhen the ribbon spool or carrier is in place on its shaft the finger 112 is received in an opening in the spool, which opening is made by a slot or cutout 122 formed in the hub 29 of the spool, and a cutout 123 formed in the lower flange 28 of the spool. When there are plies of ribbon wound on the spool, as in the case of the left-hand spool in Fig. 4, the inner ply thereof, bridging the gap or cutout 122, cooperates with the body portion 113 of the member 112 to hold it substantially parallel to the ribbon spool shaft, as illustrated. When the ribbon is completely unwound. uncovering the gap or slot 122 the member 112 is free to swing outward on its pivot as shown at the right in Fig. 4. The device or finger 112 in its in-and-out swinging movements is adapted to control a ribbon reversing member which is preferably in the form 01. a circular cam plate 124 arranged under the plate 58, said plate 124 being formed on one side with a cam edge 125 and centrally with an elongated opening indicated at 126 which loosely surrounds the hub 62 of the gear 63 and also receives the lower portion of the member 112. Ears 127 are struck up from the face of the plate 124 at opposite sides, said ears being raised sutliciently from the body of the plateto provide seats for receiving a hinge or connecting member 128. The member or connector 128 is of a general H shiape comprising side arms 129 and a connecting cross arm or web 130. At one end each of the two side arms 1129 is curled as indicated at 131 to provide a bearing opening and at their opposite ends the side arms terminate in. lateral extensions 132 which project outward oppositely away from each other and are offset downward so that their end portions 133 are in a lower plane than the general plane of the member 128. These end portions engage loosely in the seats provided below the cars 12? in. the plate 124. The bearing portions 131 fit over and bear rotatably on a pivot pin 1.34 which is. supported on the plate 58. Said plate is provided at one side behind the member 112 with. curled ears 135 which receive the end portions of the pin 134, the ears 131 of the member 128 bearing loosely on said pin between the ears 135. In Fig. 9, the pivot pin 134 is shown withdrawn to permit of the introduction of the bearing ears 131 between the supporting ears 135. The construction is such that the H-shaped member, which is pivoted to the support or plate 58 and also has a loose pivotal engagement at 127, 133 with the cam plate 124, so connects said cam plate and the support 58 as to permit up and down movement of said eain plate substantially parallel with the supporting plate 58. or otherwise stated, the cam plate when released is free to tall without binding and may be similarly raised, affording an unrestricted movement of the cam. plate into and out of operative position. It may here bementioned that in order to engage the end portions 133 with their seats in the. cam plate it is necessary to force said portions 133 slightly towards each other, the arms 129 having suflicient springiness to permit the assembler to accomplish this by pressing the arms 129 between his fingers. litter the end portions 133 have thus been seated under the ears 127 the arms 129 may be released and allowed to spring back to normal position, the hinged piece .128 thus becoming pivotally interlocked with plate 124 so that these two parts may not be accidentally separated. The up and down movements of the cam. plate 124 hereinbeifore referred to are under the control of the member 112 through. the spring loop 121 which underlies the cross arm 130. hen the member 112 is held in by the ribbon plies as at the left-hand side of Fig. 4 the loop or spring arm 121 will press up against the under side of the cross arm 130 and will hold the connector 128 up against the under side of the plate 58, said connector in turn holding the cam plate 124 in the upper position as shown. In this position the cam plate may co-operaitewith a stop pin 136 projecting downward from. the plate 58 at the diametrically opposite side thereot from f the pivot pin 134. hen the pivoted. memher 112 is released by the ribbon plies it will be free to swing outward and will permit the cam. plate 124 \TO drop downward through. the force of gravity until it comes to rest on an underlying sup-porting disk or circular late 137 which is suitably scoured to th rub 62 of the gear wheel 63 and may in turn rest on. or be supported by the upper face of said gear wheel. It may be said at this point that the nose 1.17 will cooperatewith the under face of the plate 58 to prevent undue outward swingingmovement of the member 112 on its pivot. and also that the spring arm 121 will yield to permit said member, 112 to swing inward towards the ribbon spool shaft even after said arm 121 has been arrested by the cross arm 130. The cam plate 124 and the controller 128 as well as the device 112 are mounted on the spool shaft permanently as distinguished from the detachable mounting of the ribbon spool on said shaft.

When. the rotary cam or plate 124 lowered, as illustrated at the right-hand side of Fig. 1. it is in operative position, that is, it is in a position as it rotates to coact with and operate on a train of reversing devices which include an engaging device or roller 1 /8 supported on the top of a stud 19.9 and adapted to turn or rot-ate on a headed pin 1 10 which is driven down into a hole in the top of said stud. The stud 139 at its lower end is provided with a dm-rnward extension 141 of reduced diameter which fits in a hole in a. supporting arm N2. the bottom end of the projection 1. 11 heinc" upset or spread, so as to fix the stud 39 to the arm 1 12. Said arm 142 is supported and guided in slotwavs i 13 and 1 1-1 which are cut respectively in lugs 1 15 and 11 3 projecting rearward from the upper plate lift portion 17 ot the bracket The snide slots 1&3 and 144 are at a slightintimation to the horizontal and the arm 142 s {generally horizontally disposed, extending transversely of the machine at the rear of the bracket on which said arm is sup-- ported. the inner end of the arm being pivoted on a screw pivot 147. The free end of the arm 142 is provided with. a stop face 148 which is adapted to cooperate with the end wall 119 of the slot 1.4.4 which wall acts as stop "for the arm. Said arm 1 :2 is further provided with a downwardly extending lug t l-*2" which is formed with a hole indicated at 150 through which is hooked one end oi a coiled spring; 151 whose other end is connected to a hell crank 152. which hell crank comprises an upstanding arm 153. a horizontally disposed arni 15 1 and a huh portion the last receiving a headed shoulder s'rew 156 which is threaded into the associate bracket a3 and provides a pivotal sup port tor the hell crank 1,52. The upstanding arm 15 is providedwith a hole indicated at 15? through which the forward end of the spring 151 is hooked as shown in Fig. 1. t id sp ing thus connects the hell crank [52 with the pivoted arm 142 tending constantly o draw the la tor and the upstanding arm 1521 of the hell crank 152 towards each other.

A stop or limit-in; device is interposed hetween the arm 153 and the arm 142 to limit the action of the draw spring 151, said device in the present instance being in the t'orm ot' a pin 15S slidabl mounted in a hear-inc opening in the plate-like projection T. the ends at said pin co-operatiugr with 0 a ms 1 and 1452. which arms are main-- ed in spring! pressed contact wit-h the pin the spring'151. The normal position of the parts is illustrated in Figs. 5 and 10 and in lotted lines in Fig. 6. from which it will be noted that the arm 142 is in contact with its stop 149 and through the pin or slide 153 maintains the arm 153 swung away from the adjacent edge 01 the plate 17. Connected to the outer or free end portion of the bell crank arm 15a is a slender rod or pin 159. Said pin is vertically disposed its lower end portion being slidahly guided and supported in a. vertical opening in the lower projection -18 of the associate lllalCliCt 47. The upper end portion oi. the pin 159 spatulaic and teianinatcs in a laterally extending headed pivot portion 16 which pivotallv engages with a hole in the arm iii-l. Thus the pin 159 is pivotally supported by and suspended from the bell crank li. dmvnwardlv extending: hole or opening indicated at 161 in the plate 17 att'ords access to the hell crank 152 and pin .159 at their points of connection and enahles said pin readilv to l e detached and drawn upward throug 'l'i the hole The lower end portion of the pin is beveled. or pointed as indicated at 159 for cooperation with the associ; 7e worm T6, the pointed end heing normally suspended, however. above the point at which it ma engage with said worm. From what has been said it will be understood that there are two trains of reversing devices such as have been described, one associated with each ribbon spool, each o t said trains terminating in a pointed reversing; pin 159. The era-operating worms To are so disposed along" the ribbon driving; shat't T l; that only one of them at a time is adapted to underlie and he in position for engagement with its associate reversing pin, as appears from an inspection of Fi 4.

The shaft 71 is adapted to he moved back and forth cndwise hy co-operation of the sets or pairs of worms T6 and pins 159 so as to cause alternate engagement of the driving: pinions 'i'rlav'th their associate pinions 71, and in order to permit this endwise hack and torth movement of the shaft 7% and to hold it in its shifted positions novel dctent devices are prov ded which are shown in Figs. 1-4. Said devices comprise a sleeve or collar 1G2 rotatahlv mounted on the shaft '74 near ilslclt-hand end and lined thereto hva cross pin 163. said collar 162 being: pivotall v seated or housed in a depres sion 16-1: in the le'lt-haud bushing: 79. The collar 162 s formed with two shallow circumferential grooves or depressions and 166. the adjacent sides thereof providing a crown portion 16?. COOPll'illlYO with the detent collar 162 is a detent device in the form of a coiled spring .6? which may he of ordinary construction. he coiled. spring: 168 is bent or curved around the detent collar 162. the ends of said spring being hooked. together or interlocl zed under a pull or pressure so as to provide an annular resilient member that closely em braces the collar and exerts a pressure all around its circumference. The spring 168 prevented from undue movement lengthwise ot the collar 162 by a two-part housing or box 169. 170. the parts 169 and 170 being circular in shape and each open at one end. or face, the part 170 being of lesser diameter so that it may fit snugly within the part 169, engaging it with a friction fit and enabling the two parts as a whole loosely to enclose the annular spring 168. The end portions of the two box parts 169, 170 are formed with. openings indicated respectively at 171 and 172 to accommodate the collar 162 which may. freely slide through the box. The two-part box is secured to the inner face of the left-hand side plate 1 by headed shoulder screws 173, the heads thereof overlying the edges of both box parts at diametrically opposite sides and holding the box against the machine frame.

As has been explained, when the ribbon has been unwound from one of the ribbon spools, uncovering the slot 122 in the core thereof and permitting the releasing device 112 to swing outward, the. cam plate 124 is thereby released, and when it drops down on the supporting plate 187 said cam plate will be in the plane of the roller 138 as illustrated. at the right-hand side of. Fig. 4. At this time the cam edge 125 of the said plate will be opposite the roller 138 as shown by the dotted lines in Fig. 6, and further rotation of the right-hand ribbon spool (in the direction of the arrow in Fig. 6) communicated from the left-hand spool through the pull of the ribbon, will cause the cam to act against the roller 138 and swing the arm 142 rearward, this rearward swinging movement of the arm being continued until the roller 138 rides up on to the circular portion of the cam plate 124 as illustrated in full lines in Fig. 6. It will be observed that the working face of the roller 138 is slightly tapered in a downward direction, this construction tending to prevent the cam plate 124 from accidentally rising above the plane of the roller after the parts have once engaged. As the arm 142 is swung away from its stop 149 it frees the pin 158 and the bell, crank 152,

the bell crank being turned on its pivot by the pull of the spring, 151, the arm 154 of the bell crank swinging downward and permitting the pin 159 to slide downward far enough to permit its pointed end 159" to engage with the underlying worm 76 as illustrated at the right in Fig. 4. After such engagement further rotary movement communicated to the shaft 74 through actuations of theprinting keys will cause said shaft as it is rotated to be wormed along towards the right, the parts being so ad.- justed that this rightward longitudinal shift or movement of the shaft will be continued until the left-hand driving pinion disengages from and clears its beveled pinion 71 while the right-hand driving pinion 73 intermeshes with its associate beveled pinion 71. Asa result, of course, the lefthand ribbon spool is disconnected from the ribbon feeding mechanism and the righthand ribbon spool is connected to said mechanism, so. that subsequent impulses from the printing keys will be transmitted to the right-hand, ribbon spool, causing it to be turned, to wind the ribbon thereon, corre sponding amounts being drawn from the loose or disconnected left-hand spool. WVhen the left-hand ribbon spool has thus been emptied of the ribbon, the reversing mechanism again will. become automatically effective in the manner described. Of course, when desired the reversing mechanism may be operated by hand; by pushing or pulling on the shaft 74; and the handle 11.1 affords a. convenient means. for doing this. It will be observed that asv related. in Fig. 4 the spring 168 is engaged, or seated in the right hand groove 165. in the collar 162, this engagement, operating to hold. theshaft 74 in its left-hand position with the left-hand driving pinion engaged. As the shaft 74 is. wormed. along or shifted longitudinally rightwardby, the worm and pin or shaft shifting; devices, as has been described, it carries, with it the collar 162 causing the spring: detent. 168 to ride up on the crown portion 167 of the sleeve. As soon as the spring clears the top of the crown and starts on the downward slope of the groove 164 a cam action will result under the inward or radial pressure of the spring which will assistto force the shaft 7 4towards the right, this rightward shift or movement being completed when the detent spring seats in the bottom of the groove or depression 166, the final portion of this movement completing. the engagement and disengagement of-the driving pinions. 7 3. During the back and forth movements of the sleeve 162 through the box 169, 170, said spring will expand, or increase slightly in diameter considered as an annulus in order to pass over the crown 167, and will subsequently contract to engage with the bottoms of the seats or grooves in said sleeve 162 with considerable pressure. The spring not only expands. and; contracts but has a further rolling movementv within itself, the coils turning overdue to their friction with the face of the sleeve 162. This results in a particularly smooth motion and an especially effective mechanism as well as one which is comparatively simple and free from liability ofdisarrangement and failure to function.

In some prior constructions it has been difficult to replace a. ribbon spool once re moved or to put in place a new ribbon spool, because of the releasing part corresponding to the device 112 lying this time in its outward position so that it is in the path of the plies of the ribbon. that are exposed; through the slot 123 in the bottom flanged the. pool With such a construction, should the operator forget to maintain the device 112, or the corresponding part, inside the core of the spool trouble due to fouling will result. In order to avoid this effect I provide in the present instance means for automatically maintaining the device 112 in its innermost position when the ribbon spool is removed, said means being automatically withdrawn from use and becoming ineffective when a ribbon spool is put in place. Said means in the present instance, a illustrated in Figs. 1, 9 and 12, comprises for each spool a U- shaped spring member 17%. said member being secured at its ends by rivets 175 to the top of the associate plate 58. The member 1741- partly surrounds the device 112 and the cross portion of said member is provided with a pair of inwardly extending; parallel projections 176 which are adapted for cooperation with the tabs 116. -Normally the spring member 174 is maintained substantially flat in contigzuity to the upper surface of the plate 58 by the bottom flange of the associate ribbon spool, but when the ribbon spool is removed the nherent spring of the member 171 causes it to rise or fly upward away from the plate 58. As said member rises it will catch the device 112 as said device starts to swine outward after being released or freed from the control of the ribbon spool. The inner edge of the cross portion of the member 1741 acting against the outer face of the body portion 113 of the device 112 will carry said device inward, said device turning); on its pivot 120 until the parts are arrested by the engagement of the projections 176 with the stop tabs 116. This movement of the device 112 is due to the fact that the memher is so secured and related to the plate 58 that during; its upper swinging movement the cross portion of the member 174 will also move inward towards the center of the plate. Thus the device 112 will be maintained substantially in its normal position by the member 17 1. \Vhen the ribbon spool is replaced said device will be held automatically in position to reenter the slot 123 with n the core of the spool inside the plies of ribbon wound on the core. The inwardly curved tip 114 facilitates this reentrance and the construction insures that no trouble will be experienced in replacing the spool. As the spool is pressed downward it will release the device 112 from the control of the member 17 1 which will be forced back into proximity to the plate 58.

It will be observed that each bracket 43 and the parts mounted thereon constitute a unitary structure which is detachable as a whole from the machine, thus greatly facilitatingr the assembl ng and the proper relative adjustments of the parts constituting the unit, Further it will be observed stitntes what may be termed a sub-unit or.

unitary structure which sub-unit may be detached as a whole from the bracket or support of the main unit or structure of which it is a part.

Various changes may be made without departing from my invention.

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

1. In a typewritiirq machine. the combination of a slotted ribbon vibrator, ribbon spools inclined inward and upward to direct the unwound portion of the ribbon towards the slots in said vibrator. shafts on which said spools are mounted, said shafts being inclined to the vertical. other shafts parallel to said first shafts and connected thereto to turn the same and feed the ribbon. and means for turning: said other shafts.

2. In a typewriting machine. the combination of a ribbon vibrator. a pair of ribbon spools arranged at the top of the machine frame and near its sides, said spools being inclined to direct the unwound portions of the ribbon inward and upward towards the vibrator when in normal position, a pair of inclined shafts on which said spools are mounted, a second pair of inclined shafts arranged outside the first pair and parallel therewith. connections between said two pairs of shafts. and means for turning! said second pair of shafts.

In a typewriting machine, the combina tion of a ribbon vibrator. a pair of ribbon spools inclined to the horizontal at the sides 'of the top plate of the machine. countershafts on which said spools are mounted, food shafts for said (UUTH'OPFhHHS ectending downward into the base of the machine. a horizontally arranged he. -operatcd driving:- shaft arranged in the base of the machine. and connections between said driving shaft and said downwardly extending: feed shafts.

41-. In a typewriting machine. the combination of a ribbon vibrator, a pair of ribbon spools arranged at the top of the machine frame and near its sides, said spools being inclined to direct the unwound portions of the ribbon inward and upward towards the vibrator when in normal position. a pair of inclined shafts on which said spools are mounted, a second pair of inclined shafts arranged outside the first pair and parallel therewith. shaft driving; means. and connections for reducing the speed between said second pair and said first pair of shafts. said connections comprising pinions carried by said second pair of shafts. and intermeshing pinions of larger diameter carried by said first named pair of shafts.

In a typewriting machine, the combiprinting key lGVG/TS, opera nation of a ribbon vibrator, a pair of ribbon spools arranged near the sides of the machine frame, said spools being irclined to direct the ribbon in straight paths toward the vibrator, a pair of shafts on which said spools are mounted, said shafts inclining inward and downward, a seconc pair of shafts arranged outside the first pair and inclining inward and downward in parallelism with said first pair, turning means for said sec- 0nd pair of shafts, and connections between said two pairs of shafts 6. In a typewriting machine, tl combinetion of a ribbon vibrator, a pair 1? ribbon spools arranged near the sides or the H18, chine frame, said spools being inclined to direct the ribbon in straightpaths towards 1 saw.

no" inthe vibrator, pair of shafts on we spools are mounted, shafts incli ward and downward, a second pair of sha. i arranged outside the first pair and, inclinu inward and downward in parallelism with said first pair, toothed connections between said pairs of shafts, and a lunrizontally arranged ribbon driving shaft adapted for alternative connection with said second pair of shafts.

7. In a typewriting nachine, the combination of a ribbon vibrator, a pair of ribbon spools arranged at opposite sides of and lower than said vibrator near the sides of the n'iachine frame, said spools being inclined to direct the ribbon in straight paths up towards the vibrator, a pair of shafts which said spools are mounted, said shafts inclining: inward and downward, a second. pair of shafts arranged outside the first pair and inclining inward and downward in parallelism with said first pair, constantly intermeshing pinions connecting said two pairs of shafts. a horizontally arranged driving shaft, and means for connecting: said driving}, shaft with said second pair of shafts.

8. In a typewrititrromachine, the combina tion of a ribbon vibrator, a pair of ribbon spools arranged near the sides of the machine frame, said spools being inclined to direct the ribbon in straight pal-as towards the vibrator, a pair of shafts on which said spools are mounted, said shafts inclining in ward and downward. a secont. pair of shafts inclining inward and downwa din parallclism with said first pair, constai y interineshing pinions connecting: said two pairs of shafts, horizontally arranged driving sh t,

Ive connections between said printing key levers and said drivinp; shaft, and means for connecting; said driving shaft with said second. air of shafts.

9. In a typewriting; inachi the nhination of a ribbon vibrator, a p i bon spools arranged o near each if the machine and ncl .1 inward a ward towards each othen a pair of i shafts on which said spools are mounted,

iaraeie a second pair of inclined shafts parallel with the first pair and connected thereto, a horizontally arranged ribbon driving shaft operative by the printing lreys of the machine, and means for connecting said. driving shaft with said second pair of shafts.

10. In typewritinr, machine, the combi nation of a ribbon vibrator, a pair of rib bon spools arranged one near each side of the machine and inclined inward and lip-- ward towards each other and towards the working; field of the vibrator, a pair of inclined shafts on which said spools are mounted, a second pair of inc-lined sha parallel with the first pair and connected thereto, a horizontally arranged ribbon driv ing shaft operati e by the printing keys of the machine, beveled driving pinions on said driving shaft, and beveled pinions carried. by said second named pair of shafts and with which said driving" pinions are adaptcd to intermesh.

11. In a typewritinp; machine, the combiation of a ribbon vibrator, a pair of rib bon spools arranged one near each side of the machine and inclined upward towards each other, a pair of inclined shafts on which said spools are mounted, a second pair of inclined shafts parallel with the first pair and connected thereto, a horizontally arranged ribbon driving shaft for driving operated universal bar, and connections be-- tween said universal bar and said driving? shaft.

12. In a typewritinp,- machine, the combi nation of a ribbon vibrator, pair of rib bon spools arranged one near each side of the machine and inclined upward towards each other and the vibrator, a pair of in clined shafts on which said spools are mounted, a second pair of inclined shafts parallel with the first pair and connected thereto, a horizontally arranged ribbon driv inp; shaft for driving said second named pair of shafts, hey operated universal bar, a pawl actuated by said universal bar, and av ratchet wheel connected to said driving: shaft and operative by said pawl.

13. In a ribbon mechanism for typewritinp; machines, the combination of a horizoiat ally arranged ribbon driving; shaft beveled driving oinions thereon, a pair of verticnlly disposed shafts inclining upward away from each other when view :l from the front of the machine, beveled pinions carried by the lower ends of said pair of shafts and adapted for alternative connection with said driving: pinions, a pair of short countershaftsreduction. gearing connecting the upper ends of said first named pair of shafts with said counter-shafts, ribbon spools mounted on said counter-shafts, and a rib hon vibrator between said spoolsbut in a plane behind them, said ribbon spools being inclined to direct the ribbon from their rear sides in straight paths upward toward said vibrator.

let. In a typewriting machine, the combination of ribbon spools, a ribbon driving shaft, means for connecting said shaft with said ribbon spools, a ratchet wheel connected to said shaft, a driving pawl operative on said ratchet wheel, a pawl carrying arm, a rock shaft on which said arm is mounted, and a key operated universal bar also mount ed on said rock shaft.

15. In a t-ypewriting machine, the combination of ribbon spools. a horizontal ribbon driving shaft, means for connecting said shaft with said ribbon spools, a vertically arranged ratchet wheel fixed to said shaft, a pawl constantly engaging with said ratchet wheel, a rock shaft, a forwardly extending arm fixed to said rock shaft, said pawl being pivoted to said arm, spring means for maintaining said pawl engaged with said ratchet wheel, a key operated universal bar, and a pair of crank arms rigidly connected to the ends of said universal bar, said crank arms being fixed to said rock shaft.

16. In a typewriting machine, the combination of ribbon spools, a ribbon driving shaft, means for connecting said shaft with said ribbon spools, a key operated rock shaft, and pawl and ratchet devices between said rock shaftand said driving shaft, said pawl and ratchet devices comprising a ratchet wheel connected to said driving shaft, a crank arm fixed to said rock shaft, a driving pawl pivoted to the outer end of said crank arm,a holding pawl also pivoted to said crank arm and adapted to co-operate with said ratchet wheel at the same side as said driving pawl, and a coiled spring connecting said driving pawl and said holding pawl.

17. In a typewriting machine. the combination of ribbon spools, a ribbon driving shaft. means for connecting said shaft with said ribbon spools, a key operated rock shaft, and pawl and ratchet devices between said rock shaft and said driving shaft, said pawl and ratchet devices comprising a ratchet wheel, a crank arm, a driving pawl arm pivoted to said crank arm and provided with a stop portion co-operating with a stop opening in said crank arm, a holding pawl arm pivoted to said crank arm and provided with a stop portion co-operating with another stop opening in said crank arm, and a spring connecting said pawl arms.

18. In a typewrit-ing machine, the combination of ribbon feeding mechanism ineluding a pair of vertically disposed ribbon spools, separate circular housings for said spools in which they fit snugly, and means acting on said spools and tending to lift them out of said housings.

19. In a typewriting machine, the combination of ribbon spool shafts, flanged spools thereon, separate circular housings on the top plate in which said spools fit snugly, latches for maintaining said spools in posi tion on said shafts, and lifting springs constantly tending to move said spools upward along said shafts and to lift them out of said housings, said springs becoming effective when said spools are released from the control of said latches.

20. In a typewriting machine, the combination of ribbon spool shafts, spools thereon, latches for maintaining said spools in position on said shafts, and forked spring members acting to exert pressure against the flanges of said spools at diametrically opposite sides of the shaft axis, said spring members being normally restrained by said latches.

21. In a typewriting machine, the com bination of ribbon spool shafts, spools thereon, latches for maintaining said spools in position on said shafts, lifting springs constantly tending to displace said spools along said shafts and detach the same, said springs becoming effective when said spools are released from the control of said latches, reversing devices associated with said spools, and spring means for controlling said devices when said spools are detached, said spring means assisting said first named lifting springs in tending to detach said spools.

22. In a typewriting machine, the combination of a shaft, means for turning said shaft, said shaft also being movable longitudinally. and detent devices for maintaining said shaft in set positions longitudinally considered, said detent devices comprising a collar device, a coiled spring surrounding said collar and having its ends connected together, a. housing for said spring, and means for securing said housing fixedly to a stationary part to prevent bodily movement of said spring during longitudinal movements of said shaft.

23. In a typewriting machine, the combination of a shaft, means for turning said shaft, sa d shaft also being movable longitudinally, and detent devices for maintaining said shaft in set positions longitudinally considered, said detent devices comprising a collar device, a coiled spring surrounding said collar and having its ends connected together, and a two-part box enclosing said spring and detachably secured to a stationary part.

2 In a ribbon mechanism for typewriting machines, the combination of ribbon spools, a ribbon driving shaft, trains of de vices for connecting said driving shaft. with said ribbon spools. said shafts being movable longitudinally back and forth to render said trains of devices operative alternat-ion, and detent devices for holding said shaft in any desired one of a plurahpredetermined or set positions, said (1 devices contiprisinn a grooved collar, a annulus surrounding said collar, and means for substantially preventing said annulus from moving with said sh it when it is moved longitudinally baclr and forth, said means comprisingtwo open-end box parts, one part fitting ltrictionallv within the other.

25. In a ribbon mechanism for tvpewriting machines, the (.OlYllllllfltlOD of ribbon spools. a ribbon driving shatt. trains o'l devices for connecting said drivinq shaft with said ribbon spools, said shaft beingmovable longitudinally back and forth to render said trains of devices operative in al r 2.- tion. and detcnt devices for holding said shaft in any desired one of a plurality o1. predetermined or set positions, said detent devices comprising; a collar secureo to said shaft, a spring annulus surrounding; said collar, and means "for holding said annulus from moving with said shaft during its longitudinal movements, saic means comprising two box parts each open at one end, one fitting; frictionally within the other, said box parts being secured. against t k no side of the machine frame by the heads of a pair of shouldered screws.

26. In ribbon feeding and reversing mechanism for typewritinnmachines, the combination of a pair of ribbon spools, a ribbon driving shaft, driving pinions on said shaft, reversing worms on said shaft, each worm being provided with a sleeve-ll re extension slotted at its :liree end, the drivingpinions fitting over said slotted ends, and set screws, one co-operating with each driving pinion and the underlying; slotted sleeve to secure said pinion and said sleeve in fixed relationship with said driving shaft.

27. In ribbon reversing mechanism for tvpewriting machines, the combination of a ribbon spool, a reversing device associated with said spool, a lever connected with said device, a reversing pin pivotally suspended. from one arm 01 said lever, a guide for the lower free end portion of said pin. a longitudinally movable ribbon driving shaft. and a device on said shaft with which id pin co-operates to move said shaft endwise.

28. In ribbon reversing; mechanism for typewriting machines, the combination o? a ribbon spool, a pivoted reversing novice controlled by the ribbon on said spool, a second pivoted device, operative connections between said two devices. a reversing pin pivotally suspended from sai l second device, a ribbon driving shaft, and a worm thereon, said pin co-operatinp; with said worm.

29. In ribbon reversing mechanism or typewriting machines, the combination of a pivoted reversing device controlled by the ribbon of the machine, a lever connected with and controlled by said. reversing vice, a pin suspended trom said lav shaft, said pin dropping down into one: 'ement with said worm when sain reversingdevice is freed by the ribbon.

30. In a typcwritinp; machine, the combination of a ribbon spool, a pivoted re a inc device associated with said spool. a plate, a connecto: pivotallv c( 1 r said cam plate and controlled bv said a spring pressed arm movable by plate, a lever controlled by said arm. a re versing pin suspended, from said lever. a ribbon driving shaft, and a n'oz'u'i on said driving shaft cooperating with said pin.

31. In a typewritinn' machine. the coin bination of a pair oi? ribbon spools. pivoted reversing devices one associat d with each spool, cam plates, connectors ivotallv connected to said plates and (or ollcd hv said reversing devices, pivoted arms op' wivsaid cam plates, a pair ol levers .ach con trolled by one of said arms. reversing pins suspended from said lGVOl'l-l, a 'ibon d" shaft, and worms inouned on. shaft and space apart to altcrnativclv operate with said .reversion pins to more said shaft longitudinally bacl: and "forth.

82. In a tvpcwriting; machine. the combination of a ribbon spool, ivoted revcrsinn" device associated therewith and provided with a spring; arm, a cam plate, a pivoted connector controlli said cam plate and in turn controlled by siud sprii '1' arm, a train of reversing devices oper said cam plate, said train includinc; reversing;- pin, a ribbon driving shaft and a worm thereon e e-operative with said pin In a typewritten; machine, the cour bination ot a ribbon spool comprising; a core havinpan opening: a pivoted re ers o dec: L i. l vice comprisin uned substantially wisin said ore by the plies of ribbon, said device also comprising a spring arm; a cam plate; a pivoted connector controllinn' saidv cani plate and in turn controlled bv said spring arm; a illl-Jfi cl rovelsing devices ope "ative by said cain plate, said train including a reversing pin; :2. ribbon driving shaft; ad worm thereon cooperative with ,d pin.

34-. In a typewriti machine, the cornbination of a ribbon spool comprising a core having an opening; a rcversi device preterably made of sheet metal and comprising; both body portion terminating at the top in an inwardly turned l e and also two side portions, device further comprising a, spring loop dispos d substaiuiall. at right angles to said body por on, r aid body portion being; normallv retained in an upright position bv the ribbon plies br dging; the opening in the core of said spool; a cam plate; a pivoted connector con r lling s d cam plate and in. turn centre. by said lllt) spring loop; a train of reversing devices operative by said cam plate, said train including a reversing pin; a ribbon driving shaft; and a worm thereon cooperative with said pin.

35. In a typewriting machine, the combination of a ribbon spool comprising a core having an opening; a reversing device preferably made of sheet 11 :Lai and comprising a body portion and two side portions, said body portion terminating at the top in an inwardly turned lip, and the two side portions terminating at the top in stop tabs, said device further comprising a spring loop disposed substantially at right angles to said body portion, said body portion being normally retained in an upright position by the ribbon plies bridging the opening in the core of said spool; a cam plate; a pivoted connector controlling said cam plate and in turn controlled by said spring loop; a train of reversing devices operative by said cam plate, said train including a reversing pin; a ribbon driving shaft; a worm thereon cooperative with said pin; and an automatic spring becoming effective when the ribbon spool is removed to hold said reversing de vice in its normal position, said tabs providing stops to limit the action of said spring.

36. In a typewriting machine, the combination of a ribbon spool comprising a core having an opening; a support for said spool; a reversing device pivoted to said support and adapted to enter said opening, said device being provided with a stop; a train of reversing devices controllable by said pivoted device; a ribbon driving shaft adapted to be moved endwise by said train; and a U-shaped spring secured to said sup port and becoming effective automatically when the ribbon spool is removed therefrom to hold said pivoted device in its normal position, the aforesaid stop on said device limiting the action of said spring.

37. In a typewriting machine, the combination of a detachable ribbon spool; a supporting plate therefor; a. reversing device associated with said spool, said device being pivoted on said plate; a controller pivotally supported on said plate and normally maintained in proximity thereto by said reversing device; a cam connected to said controller; a train of reversing do vices operative by said cam; and a spring supported on said plate and automatically effective when said ribbon spool is detached to retain said pivoted device against dis placement.

38. In a typewriting machine, the combination of a ribbon spool, a supporting plate, a reversing device mounted on said plate, an H-shaped controller pivoted to said plate and normally retained by said device, a cam plate connected with said controller to permit relative movement between the adjacent faces of said plate and said controller, and a train of reversing devices operative by said cam plate.

39. In a typewriting machine, the combination of a ribbon spool; a supporting plate; a reversing device mounted on said plate; an l'l-shaped controller comprising spring arms terminating in lateral projections, said controller being mounted on said plate; a cam plate provided with seats with which said lateral projections have interlocking yielding engagement; and a train of reversing devices operative by said cam plate.

40. In a typewriting machine, the combination of a ribbon spool; ribbon reversing devices associated with said spool comprising a cam plate; an arm which said cam plate is adapted to move; a second arm; means constantly tending to draw said arms toward each other; a slide interposed between said arms; a ribbon driving shaft; and shaft shifting devices controlled from said second arm.

41. In a typewriting machine, the combination of a ribbon spool; ribbon reversing devices associated with said spool comprising a cam plate; an arm which said cam plate is adapted to move; a second arm; a coiled spring having its ends connected to said arms; a device interposed between said arms and limiting the action of said spring; a ribbon driving shaft; and shaft shifting devices controlled from said second arm.

42. In a typewriting machine, the combination of a ribbon spool; ribbon reversing devices associated with said spool comprising a cam plate; an arm which said cam plate is adapted to move; a second arm; spring means tending to draw said arms toward each other; a slide pin engageable by each of said arms; a ribbon drivin shaft; and shaft shifting devices controlled from said second arm.

43. In a typewriting machine, the combination of a ribbon spool; ribbon reversing devices associated with said spool and comprising a cam plate; a pair of pivotally mounted arms; a draw spring connecting said arms; means constantly limiting the action of said draw spring; a ribbon driving shaft; and shaft shifting devices, certain of said shifting devices being connected to one of said arms.

a l. In a typewriting machine, the combination of a ribbon spool; ribbon reversing devices associated with said spool and comprising a cam plate; a pair of pivotally mounted arms; a draw spring connecting said arms; a slide pin between said arms and contactive with each; a ribbon driving shaft; and shaft shifting devices, certain of said shifting devices being connected to one of said arms. 1, .1.

45. In a typewriting machine the combination of a ribbon spool; ribbon reversing devices associated with said spool comprising a rotary cam; a pivoted arm provided. with an engaging device engageable by said cam; a bell crank operative on said pivoted arm; a reversing pin pivoted on said bell crank; a ribbon driving shaft; and a worm thereon coacting with said pin.

46. In a typewriting machine the combination of a ribbon spool, ribbon reversing devices associated with said spool. comprising a rotary cam, a pivoted arm provided with an engaging device engageable by saio cam, a bell crank, a slide pin interposed between said bell crank and said arm; a draw spring connecting said bell crank with said arm a reversing pin supported. by said bell crank, a ribbon driving shalt one reversing device on said shattcoactive with said reversing pin.

47. In a typewriting machine, the com bination of a ribbon spool. shaft; a supporting plate; a reversing device mounted on said plate; an H-shaped controller coinprising spring arms terminating in lateral projections said controller being mounted n said plate; a cam plate provided with sea with which said lateral projections have interlocking spring engagement pern'iitting relative angular movement between said cam plate and said controller; a second supporting plate underlying said cam plate all of said parts being supported on said shaft and comprising therewith a unitary struc ture; and a train of reversing devices operas tive by said cam plate.

48. In a typewriting machine, the combination of a ribbon spool shalt; a supporting plate; a reversing device mounted on. said plate; an l-l-shaped controller comprising spring arms terminating in la:v ral jectionsi said controller being mounted on. said plate; a cam plate provided with b ats with which said lateral projections nave interlocking spring engagement; :1 second support ng plate underlying said cam plate; spool turning devices comprising a wheel mounted on said shaft said wheel and all of thepreceding parts being mounted on said shaft and comprising therewith a unitary structure; and a train of reversing devices operative by said cam. plate.

d9. In a typewriting machine, the combination of a ribbon spool sha-il t detacl'iably supported on the frame of the machine; a supporting plate; a reversing device mount-- ed on said plate; l-l-sha'ped controller comprising spring'arms terminating in lateral projections said controller being mounted on said plate; a cam plate provided with seats with which said lateral projections have interlocking spring engagement: second supporting plate underlying said cam plate, all of said parts being detacha-veers able as a single element or unitary structure irom the machine with said shalt; and a train oif reversing LlGVlCbi operative b said cam plate.

50. ln a typewriting machine, the combination. of a ribbon spool in it a stationary bearing for said shaft, a yielding 'ye cooperative with a groove in said shalt to de v cure said shalt '11 its bear-ii ribbon spool. detachably su sliait a ribbon feeding g 7 incurred on said shalt ant i rovers devices permanently ousted ;-.aid share.

51. ln a typewriting machine the combination of ribbon spool shalt a detachably maintaining said sha t oi support, a ribbon spool. aiatcli ably maintaining said spool 1 said ill a spool turning device pcrniaru ed on said shaft, and a ribbon i vice permanently mounted on ln a typewriting machine nation of ribbon spool shalt, detachably maintaining said shsupport a ribbon spool, a latch for ably maintaining said spool, on said shr a gear wheel permanently mom "ed 1. said shalt, said gear wheel being in le ribbon feeding mechanism a r ing' cam; and cam controlling cam and said controlling r mounted permanently on said short.

In a typewriting machine the c nation of. a ribbon spool: ribbo r devices associated with said sic i rotary cam: a pivoted arm provided with engaging device eng ible by cam; a bell crank; a slide pin between said bell crank draw spring connecting s said arm: a reversing ill boll crank; a ln'ackct (let? on the machine frame on v. said ribbon spool and all a'l'oresaid; a ribbon d...i-.*' vcrsing device on said said reversing; pin.

54. In ribbon mechanism for machines the combination of a unitary structure comprising a bracket dctzmhal:l; 1 secured to the frame of the machine; a ribbon spool on said bracket; a ribbon teed shaft; a. counter-shalt suvporting said ribbon spool and connected to be turned by said teed shalt, both said shafts being mounted on said bracket; and ribbon reversing devices mounted on said. bracket.

55. In ribbon mechanism for typewriting machines, the combination of a unitary structure comprising a bracket detachably secured to the frame of the machine; a ribbon spool on said bracket; a ribbon feed shaft; a counterehatt supporting said ribbon spool and connected to be turned by said feed shaft; both said shafts being mounted b i ch lll) on said bracket; and ribbon reversing devices mounted on said bracket, said reversing devices comprising a pivoted device controlled by the ribbon plies; a rotary cam; a pivoted arm; a bell crank connected to said pivoted arm; and a reversing pin suspended from said bell crank.

56. In ribbon mechanism for typewriting machines, the combination of a unitary structure comprising a bracket detachably secured to the frame of the machine; a ribbon spool on said bracket; a ribbon feed shaft; a counter-shaft supporting said ribbon spool and connected to be turned by said feed shaft, both said shafts being mounted on said bracket; and ribbon reversing devices mounted on said bracket, said countershaft together with the ribbon spool and certain of the ribbon feeding and reversing devices constituting a sub-unit which is detachablc from said b 'acket.

57. In a typewriting machine, the combination of a ribbon spool; ribbon reversing devices associated with said spool comprising a rotary cam; a pivoted arm provided with an engaging device engageable by said cam; a bell crank; a slide pin interposed between said bell crank and said arm; a draw spring connecting said bell crank with said arm; a reversing pin supported by said bell crank; a ribbon driving shaft; a reversing device on said shaft coactive with said reversing pin; and ribbon feeding mechanism between said driving shaft and said spool.

58. In a typewriting machine, the combination of a ribbon spool; ribbon reversing devices associated with said spool comprising a rotary cam; a pivoted arm provided with an engaging device engageable by said cam; a bell crank; a slide pin interposed between said bell crank and said arm; a draw spring connecting said bell crank with said arm; a reversing pin supported by said bell crank; a ribbon driving shaft; a reversing device on said shaft coactive with said reversing pin; ribbon feeding mechanism between said driving shaft and said spool comprising a feed shaft connected to said driving shaft; and a counter-shaft connected to said feed shaft and supporting said ribbon spool.

59. In a typewriting machine, the combination of a ribbon spool; ribbon reverslng devices associated with said spool comprising a rotary cam; a pivoted arm provided with an engaging device engageable by said cam; a bell crank; a slide pin interposed between said bell crank and said arm; a draw spring connecting said bell crank with said arm; a reversing pin supported by said bell crank; a horizontal ribbon driving shaft; a worm or cam thereon co-operative with said reversing pin; a driving pinion on said shaft; an upright feed shaft provided with a pinion intermeshing with said drivin pinion; an upright countershaft; an toothed connections between said feed shaft and said counter-shaft, said ribbon spool being mounted on said counter-shaft.

60. In a front strike typewriting machine, the combination of a platen; a ribbon vibrator at the front side thereof; a pair of ribbon spools arranged in inclined positions at opposite sides of the machine forward of the platen; pairs of counter-shafts on which said ribbon spools are mounted; feed shafts; toothed connections between said countershafts and said feed shafts, said shafts being arranged in pairs extending downward and inward toward each other; a horizontal driving shaft; driving pinions thereon; cooperating feed pinions on said feed shafts; a key operated universal bar; pawl and ratchet connections between said universal bar and said driving shaft; and ribbon reversing devices comprising pivoted members associated with each ribbon spool and controlled by the ribbon plies, rotary cams controlled by said members, spring pressed arms controlled by said cams, reversing pins connected with said spring pressed arms, and worms on said ribbon driving shaft cooperative with said reversing pins.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 29th day of March, A. D. 1921.

EDWIN E. BARNEY.

Witnesses:

CHARLES E. SMITH, LILLIAN Nnnson.

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