US2062455A - Writing machine - Google Patents

Description

Dec. 1, 1936.

B. L. HENRY WRITING MACHINE Filed March 12, 1931 4 Sheets-Sheet l INVENTOR. 55am loo/s5 HNRY v A TTORNE Y.

Dec. 1, 1936. B. L. HENRY 2,062,455

WRITING MACHINE Filed March I2, 1931 4 Sheets-Sheet 2 INVENTOR. BEULAH LOUISE HENRY A TTORNE Y.

Dec. 1, 1936. B. L. HENRY WRITING MACHINE Filed March 12, 1951 4 Sheets-Sheet 5 INVENTOR. Beam/41001:: Hf/VR V A TTORNE Y.

Dc. 1, 1936. i B. L. HENRY WRITING MACHINE Filed March 12, 1931 4 Sheets-Sheei; 4

3501)) Lo 01:: Htuey ATTORNEY.

INVENTOR.v

Patented Dec. 1, 1936 UNITED STATES PATENT OFFICE This invention relates to writing machines and has for an object to provide an improved devicev for use in producing a plurality of copies each having the appearance of a so-called original ribbon copy.

The invention has been developed in connection with the production of a typewriter attachment carrying an ink impregnated ribbon arranged to be interposed between successive sheets of paper opposite the position of operation of the usual type bars and such an embodiment will be more particularly described for the purpose of illustrating the principles of the invention. It will be understood, however, that the descriptionof the particular device is illustrative merely and is not intended as defining the limits of the invention.

It is a feature of the preferred embodiment of the invention that the attachment constitutes a separate unitary structure which can be applied as a unit to a standard fully equipped typewriter and when not required for use it can be readily removed as a unit.

It is also a feature of. the invention that the ribbon support can be conveniently adjusted either to operative position for use or inoperative position to permit use of the typewriter without use of the device for making multiple copies.

For the purpose of effecting this invention, there has been provided an assembly which, as a unit, may be attached to a typewriter,- or similar machine, so that an inked-ribbon carriedthereby will be positioned for co-action with paper, or similar material for receiving an inscription, fed into; or positioned in, the machine, and the writing elements of the machine. The ribbon is intended for use either in conjunction with the ribbon ordinarily arranged upon such machine, or without such ribbon. In the specific embodiment of the invention hereafter to be described, the assembly is so associated with the machine that the new ribbon extends substantially the entire length of the platen, and is suspended directly between the platen and the type-bars. While the ribbon will be shown capable of being fed back and forth in front of the platen, it is to be understood that, the invention is not limited to this particular arrangement. By feeding the ribbon longitudinally of the platen, and returning it, it is possible to dispose, between the ribbon sections, so produced, a plurality of sheets of paper, fed by the platen, so that a portion of paper will be disposed to receive the original impact from one ribbon, and to transmit the pressure, arising from this impact, to successive sheets beneath the original sheet, to effect the production, on such other sheets, from the other portions of the ribbon, of an inscription, identically the same as the original inscription.

The assembly isso related to the machine that it may be moved vertically toward, and away from, the writing position,- so that the ribbon may be made effective, or ineffective, at will, as desired. The assembly includes mechanism for feeding the ribbon longitudinally of the platen at a predetermined stage in the movement of the platen relatively to the type-bars. Preferably,

this mechanism is so devised that the movement will be effected when the carriage is being returned to the beginning of a new line, in order that movement of the ribbon will not be effected at any time that the type-bars might be effective to produce an imprint. The apparatus for feeding the ribbon is arranged so that the feed of the ribbon may be changed at will, thatis, it may be reversed, or, if desired, made inefiective.

The ribbon carrying and feeding means is assembled on the writing machine so that it is immediately accessible for changing ribbons, or for adjustment thereof during the operation of the machine. The ribbon is disposed so that it will feed downwardly toward the writing machine; it is diverted and twisted from its original plane of movement so as to cooperate with the platen and the type-bars.

The invention, however, is notintended to be restricted to the particular construction and arrangement of parts, nor to the particular application of such constructions, nor to the particular mode of operation, nor to the various steps or details thereof, herein shown, as the same may be modified in various particulars, or be applied in many varied relations, without departing from the spirit and scope of the invention, the particular illustration and description going only so far' as is necessary to illustrate an operative embodiment by which the invention might be carried out.

On the drawings,-

Fig. 1 is a view in perspective of a portion of a typewriting machine, illustrating the manner of embodying the invention therein.

Fig. 2 is a front elevational view of the ribbon positioning and moving means, embodying the invention, the housing being partially broken away to disclose the interior of the latter.

Fig. 3 is a plan view of the apparatus, a part of the housing being broken away to disclose the arrangement of the ribbonrollers therein.

Fig. 4 is a side elevational view of the apparatus, as seen from the line 4-4 of Fig, 2.

Fig. 5 is a vertical sectional view, on the line 55 of Fig. 2.

Fig. 6 is a view in perspective, illustrating the manner of application for the invention to the simultaneous production of a plurality of copies.

Fig. '7 is a view, on the line 'I-'I of Fig. 8, illustrating details of the operating mechanism;

Fig. 8 is a perspective view of a detail of the invention.

Fig. 9 is a perspective view of another detail of the invention.

Fig. 10 is a sectional view on the line I8-I8 of Fig. 4.

In the embodiment of the invention shown in the drawings there is represented, at I8, a portion of a typewriter, which may be of any conventional construction. Upon this typewriter has been assembled the ribbon positioning and feeding means I2. Typewriter I8 may have associated therewith a pair of spools I4 and I8 of any conventional or desired type, the ribbon I8, which is to be fed past a ribbon vibrator 28, pcsitioned at the writing point 22, being wound upon such spools. The type-bars 24, only portions of which are shown, are intended to be driven up to a point 22, where they will'impact against the ribbon, whereupon an imprint will be produced upon a paper sheet, retained upon platen 25 in the customary manner. Paper fed by the platen is intended to cooperate with a paper support 28 and to be guided by means of a line scale 38 and a finger 32 so as to be brought accurately into position relative to the ribbon for the action of the type-bars.

Means-I2 is intended to position a ribbon 34 between the vibrator and the platen for purposes which will be made to appear more clearly hereinafter. The means includes a frame 36, comprising a pair of posts 38 and 48, assembled upon the carriage 42 with which the platen is associated. The posts provide uprights along which the end brackets 44 and 48 may he slid. Between these brackets extend brace bars 48 and 58, assembled as hereinafter appears.

On one of the brackets is fixedly .arranged a housing 52 within which are assembled ribbon spools 54 and 56 about which ribbon 34 is wound and unwound during the operation of the apparatus. Guide means 58 and 88 are provided upon brackets 44 and 46 to position ribbon 34 in its effective relation relatively to the platen, the paper and the type-bars, when the machine is used. In order to feed the ribbon at predetermined intervals during the operation of the machine, the positively driven means 62 is provided to effect the rotation of the spools in accordance with the setting of a clutch mechanism 84.

Posts 38 and 48 preferably consist merely of rounded portions having threaded reduced ends 86 and 68, whereby the same may be associated with threaded recesses I8 provided upon carriage 42. Preferably a transverse opening I2 is provided in each of the posts for the reception of a tool, by means of which the posts may be more securely locked in position in recesses 18. A screw head 14 may be provided at the upper end of each of the posts for engagement by a screw driver bit in order more readily to associate the posts with the carriage.

Brackets 44 and 48 are substantial, and preferably, metal stampings. Bracket 44 may be formed may have an outwardly projecting, and downwardly turned arm 88. Aligned openings 82 are formed in ear I6 and shelf I8 for the reception therethrough of post 38.

At the other extremity of frame 36 is positioned bracket 46 Fig. 9 which may likewise be a metal stamping having an ear 84 and a shelf 88. A pair of aligned openings 88 may likewise be provided through ear 84 and shelf 88 for the reception therethrough of post 48.

Each of the brackets has provided, in the vertical walls 98 and 92 thereof, a pair of openings 94 and 9B. The ends of brace bars 48 and 50 are received in these openings and are headed over, or riveted, to retain the brackets firmly, yet slightly flexibly, associated. Frame 36, including brackets 44- and 46, as stifiened by bars 48 and 58, is intended to be movable vertically along the posts, at will, as it is desired to move ribbon 34 into, and

out of, position relative to writing point 22. In

order to retain the ribbon positioning and feeding means I2 fixedly related to the writing position at the time ribbon'34 is intended to be positioned for use, a notch 98 may be provided in post 48, with which may co-act a finger I88 of a lever I82, pivoted upon a portion of bracket 46. The lever is normally urged into cooperation with the notch by a spring I84, bearing against a portion of bracket 48 and the lever for this purpose. A thumb piece I86 is provided to permit actuation of the lever to release the frame for movement upwardly. By pressing against bars 48 and 58, the frame may be moved downwardly, until the finger engages within notch 98, whereupon the frame will be anchored with relation to writing point 22 so that the ribbon may properly coact with the type-bars.

In association with bracket 44 and its post 38, I

there is provided a member I88, Fig. 2 U-shaped in cross section,'and substantially of the length of wall 98. Secured to this member in any desired manner, at the cross arm thereof, is a flat spring II8. When member M8 is positioned between ear I6 and shelf I8 so as to be capable of engaging post 38 within the cavity II2 of the U- section, this spring will force the member into contact with the post and tend to force bracket 44 away from the post, thus assuring a desired frictional engagement between post and bracket which will resist unwarranted movement of means I2 relative to point 22. Openings 82 preferably are of substantially larger diameter than post 38 to permit slight play of the post within these openings, so that the spring may function properly for the purposes set forth.

Bracket 46 has formed thereon a pair of lugs I I4 and I I5, which are intended to provide means for securing thereto housing 52. This housing may be made of sheet metal, pressed or stamped so as to provide a rear wall II8 which is secured against lugs H4 and H5 by any desired means. When so secured, there is provided a pair of aligned openings I28 and I22 in lug H4 and an additional lug H6, parallel to lug I I4, for the reception therethrough of a shaft I24 upon which spools 54' and 56 are mounted, in the manner hereinafter more specifically described.

Associated with lug H4 and wall II8 of the housing, at the opening I28, is a bearing I26; such bearing may be formed from a bushing, inserted through openings in the rear wall and the lug, and then headed over, to assure its firm retention relative to the bracket 46 and the housing. At lug H6, in like manner, there may be associated another bushing to provide bearing I28,

which, together with bearing I26, provides the support and retaining means for shaft I24.

Afiixed to the outer end of the shaft is a finger member I30, intended to be gripped by the fingers of the operator to move the shaft rotationally or longitudinally, for purposes either of feeding the ribbon manually, when so desired, or of setting the ribbon feeding means to drive the ribbon in either direction or in non-feeding position, as desired.

Each of the spools 54 and 56 is of substantially the same construction as spools now generally in use upon machines of this character. Each spool may consist of a circular plate I32 and a dished plate I33, the dished portion of which provides an axle or hub member I34, upon which the ribbon is 'wound, and retaining the plates in separated relation. With each of the hub members is provided a portion I35 having a groove I36. The hub member is provided with a bore I38 sufficient to permit the spools, unless otherwise restrained, free rotation upon shaft I24, upon which they are intended to be assembled. On shaft I24, there is provided a pin I40, fixedly associated with the shaft, and having the end portions thereof extending beyond the shaft in such relation that, if the shaft be pulled so as to draw it out of the housing, pin I 40 would be brought into groove I36, engaging spool 54, and driving the same, as

shaft I24, rotates, to feed the ribbon.

Finger member I30 is formed so that it may be removed readily from the shaft end so that the ribbon spools may be interchanged to renew the ribbon, or for similar purposes. The member is formed, for this purpose, with a threaded portion receivable over the threaded end I44 of the shaft. Since the shaft is intended to be rotated in one direction only, and normally is restrained against other rotation. the manner of threading is preferably such as to tighten the grip of the threads when attempt is made to rotate the shaft in its intended direction, and to thread the finger piece off the shaft when reverse movement is attempted. The inner end of the member I30 is formed with one or more lugs I46. preferably a pair. diametrically aligned. These lugs are intended toengage within the groove I36 of the spool 56: this engagement occurs when the shaft is moved into the housing. the lugs then sliding into en agin y relation with the groove so as to be capable of flange I 58, the cover being. intended to be slid over the housing. and then, by a slight rotative movement, to have the slots engage over the pins and under the heads thereof. To permit the essociation of the cover with the housing. by the rotative action described. a portion of the wall of the housing, as at I64, may-be cutaway.

At opening I52, there is assembled a washer I 66 between which, and the wall of the cover, there is positioned a spring washer I10.- These elements are retained in relation to eachother by a portion of the cover, belled up around the opening. This portion is turned down against washer I 66 to retain both washers associated with the cover, yet permitting movement of washer I66,

under the action of spring washer I10, toward, and. against, the spool 56, which is intended to be frictionally engaged by washer I 66 during the operation of the apparatus, the bell extending In like manner, a spring washer I14 is assembled upon the rear wall of the housing, at the opening therethrough, to coact with spool 54. A

washer I16 is positioned between spools 54 and 56 to maintain them in spaced relation, and also to reduce the frictional engaging surfacesof these members, to facilitate their relative rotational movement. The assembly of washer I14 upon the housing is accomplished preferably by turning over, the end of bearing I26 rather than by working the metal of the housing itself, although this also may be done, if desired.

By the arrangement of washers I66, I14 and I16, when the cover I48 is assembled upon the housing, the ribbon spools will be retained upon the shaft I24, being permitted but slight longitudinal movement against the action of washers I66 and I14. Washers I66 and I14 actually apply a frictional drag against their respective ribbon spools, preventing slack in the ribbon as it is wound and unwound. When the housing cover is removed, and the finger piece removed, both ribbon spools may be removed from the shaft.

Bearing I28 is formed with a drilled aperture I18 Fig. 10 in which is housed a ball I80, retained in position by a split spring washer I82, which is seated within a recess I84 in the bearing. The ball, as part of clutch mechanism 64, is intended to cooperate with a number of circumferential grooves I86, preferably three in number. and arranged so that, in one position,- shaft I24 will be retained so that pin I40 cooperates with ribbon spool 54, in its next'position, pin I40 will be out of engagement'with'spool 54, and lugs I46 will have been advanced toward spool 56, but will not have engaged such-spool, and in the next successive position, the lugs will be brought directly into engagement with'spool 56 so that the latter may be driven from shaft I24. I92 are provided to limit the movement of the shaft with relation to the assembly, the collar I being adapted to engage bearing I 28, while collar I92 will engage lug I I6.

In order to effect feeding movement of the ribbon relative to the platen, drive means 62 Figs. 3 and 7 is provided and is effective to rotate the shaft I24 in one direction. As has been pointed out, the relation of the shaft to the spools is such that but one only of the spools may be rotated at one time; this selective rotation, by the arrangement of the ribbon upon its guiding means, makes it possible, by manipulating the finger piece, to control the direction of feed of the ribbon as desired. Drive means 62 may consist of a ratchet wheel I94, keyed to shaft I24, and operated by a pawl I96. carried upon a pawl carrier I98. The wheel and the pawl carrier partially extend through a slot 200, formed in bracket 46, and are thus retained against longitudinal movement along the shaft.- The pawl carrier is mounted pivotally upon the hub 202 of the ratchet wheel, and at one extremity. thereof has secured a bushing 204, retained by such means as screw 206. Wound around the bushing is a spring 208, one end of which bears against the pawl carrier, and the other end of which is anchored within an opening in the pawl I96 so that the latter is retained pressed against the teeth of wheel I94.

into the dished portion of the plate I33 of spool Collars I 90 and The other end of the carrier is off-set, as at 2"), to clear a vertically movable rod 2l2, Fig. 4 a pin-2l4 upon which engages within a slot 216 in the off-set end. The rod is substantially square in cross section at its: lower extremity, and passes through an opening 2l8 in shelf 86. The opening is also square in cross-section, cooperating to retain the rod against rotational movement, and to retain pin 2 properly related to slot 2l6, at all times. At the upper end of the rod, there is formed a reduced portion 220, which passes through ear 84 to align the rod with opening 2|8. Received between the ear and a washer 222, seated upon the shoulder between the reduced portion and the body of the rod, is a spring 224, acting normally to push the rod downwardly. A collar 226 on the outer end. of portion 220 limits downward movement of the rod.

At the lower extremity of the rod, there is pivotally mounted a finger 228, the end of which carries a roller 23!]. At the pivot of the finger,

there is provided a lug 232 which cooperates with a surface 234 at the end of the rod, the relation of lug and surface being such that the finger will be permitted substantial rotation out of a vertically aligned relation with the rod, inone direction only. A camming surface 236 may be provided at any point along .the body of the typewriter, which remains stationary, relatively to the carriage, at all times during the operation of the machine. The surface is intended to be in such position that roller 23!! would ride over it at some interval in the operation, or movement, of the platen.

The roller, in engaging the surface '236, in movement in one direction, will merely pivot away from the surface so as to ride freely over it. In movement inanother direction, however, the cooperation of lug 232 and surface 234 will force the roller to move vertically, in aligned relation to rod 2l2, and thus to effect vertical movement of the rod against the action of spring 224. During this movement, the pawl carrier will be rocked to actuate the pawl I96. sliding. it over the teeth of the ratchet wheel. When the roller has passed beyond the surface 236, return of the rod, under the action of its spring, will cause positive driv-' ing of wheel I94 as the pawl engages its teeth.

For the purpose of restraining the wheel against unwarranted movement, when the rod is moving upwardly, there is provided a spring finger 238, secured to a wall of the: housing, and bearing against the teeth of the wheel at all times. The finger is located so that the wheel may rotate only in the direction in which the pawl I96 is' intended to actuate it. The wheelwill thus be retained against any unwarranted movement throughout the operation of the apparatus.

The surface 236 and the roller 230 preferably are so locatedthat they will be inactive to produce any movement of the ribbon except after a line of writing has been completed, and the platen is being moved backwardly to start a new line. In this manner, no movement of the ribbon relatively to the sheet is produced at any time that a writing element might be brought into active relation with such sheet. As can be seen, provision is herein made whereby the ribbon remains stationary throughout the movement of the platen as the type-bars are active. In other words; a new ribbon portion is presented for each successive impact of a type bar against the paper sheets upon the platen. Variations of the particular feeding means obviously may be made and provision may be made, by a plurality of surfaces 236, to secure a number of actuations of the ribbon during any single movement of the carriage.

Forming a part of shelf 86 is an extending arm 240 with which is associated a bracket 242, preferably secured to the rear wall of the housing and intended to brace arm 240. Secured to the cooperating ends of the arm and bracket is the guide means 58, including the turning piece 244. This piece is preferably a portion of solid metal, formed with a suitable recess 246 for the reception of the endsof the arm and bracket. Piece and retained in vertical position between an ear 252 and a lug 254, struck up from the arm, will be positioned substantially in alignment with the position of a pair of pins 256. These pins are carried upon an extending seat 258 preferably formed integrally with turning piece 244. It is intended that the ribbon from spool 56 shall be guided down through the open bottom of the housing, and be brought into engagement with, and turned around a face 248, then to be wound past a pin 256, carried around the roller 250, then back around the other pin 256, over and around the other face 248, to the spool 54. The

ribbon, in its use, will by this means, first be disposed with its plane practically perpendicular to the surface of a portion of paper -or the likeretained by the platen of the typewriter. Then, by means of the turning piece and the associated pins and the roller, it will be twisted around into i a plane substantially parallel to that of the paper. Also, instead of a single ribbon being disposed between the .paper and the type-bars, there will be two distinct ribbons so positioned, for purposes which will be more fully described hereinafter. These two ribbons will be disposed substantially in coincidence, insofar as the paper with which they are to cooperate is concerned.

The number of copies produced by this appalratus may be varied in accordance with the number of turns of the ribbon, these turns-being produced merely by the provision of additional pins and rollers.

In order to produce a plurality of copies, upon a machine using this invention, it is first necessary to move means l2, as a unit, downwardly, to position the ribbon at the writing position. When the ribbon is thus located, the

sheets of paper, fed around the platen. may then be manipulated so that, as shown in Fig. 6, a ribbon will be disposed between two successive sheets of paper. -In,one desired instance, a sheet of paper may be positioned in back of one turn 260 of the ribbon, while the other ribbon turn 262 will be positioned between two other successive portions of the paper. Then, by manipulating the type-bars 24 to strike the paper and the ribbons, associated in the manner indicated, imprints upon all the sheets of paperwill be produced, each of the imprints being exactly the same, and each of the imprints being a permanent ink impression. Some of these'impressions will be produced on the back face of a'sheet; however, by using a translucent or transparent material for the sheet, the imprint will be made clearly visible on the front face of the sheet.

As each type-bar becomes effective, the carriage moves relatively to the writing point in the finished, the platen is manipulated to position the sheets of paper to have imprinted thereon a new line of writing. The sheets feed freely, without smudging, through the suspended ribbon turns, which remain stationary. The ribbon, therefore, need be only as wide as one line of writing in order to accomplish the desired results.

Many other changes could be effected in the particular apparatus designed, in the methods of operation set forth, and in the specific details thereof, without substantially departing from the invention hereof which is intended to be defined in the accompanying claims, the specific description hereinabove being set forth merely to illustrate an operative embodiment for carrying on the spirit of the invention.

What is claimed as new and useful is:-

v 1. In combination with a writing machine having a plurality of impact writing elements and a paper receiving and retaining member, the member and the elements being relatively movable to make the elements capable of writing on paper retained by the member along a line selected at will, a pair of supports extending vertically from the member and in spaced apart relationship along the member in the direction of the line of writing, a frame slidably carried by the supports for movement toward and away from the member, extensions from the frame adjacent each end thereof, one of the. extensions having a guide plate mounted thereon, and turning pins on each of the extensions, the plane of the plate intersecting transversely a line connecting between the pins.

2. In combination with a writing machine having a plurality of impact writing elements and a paper receiving and retaining member, the member and the elements being relatively movable to make the elements capable of writing on paper retained by the member along a line selected at will, a pair of supports extending vertically from the member and in spaced apart relationship along the member in the direction of the line of writing, a frame slidably carried by the supports for movement toward andaway from themember, extensions from the frame adjacent each end thereof, one of the extensions having a V-shaped guide plate mounted thereon, and turning pins on each of the extensions, the plane of the plate intersecting transversely a line connecting between the pins.

3. In combination with a writing machine having a plurality of impact writing elements and a paper receiving and retaining member, the memher and the elements being relatively movable to make the elements capable of writing on paper retained by the member along a line selected at I will, a pair of supports extending vertically from the member and in spaced apart relationship along the member in the direction of the line of writing, a frame slidably carried by the supports for movement toward and away from the member,.extensions from the frame adjacent each end thereof, one of the extensions having a guide plate mounted thereon, turning pins on each of around the pins, the plate acting to change the direction of the ribbon from its disposition on the spool to its disposition between the pins. 4. In combination with a writing machine hay.

ing a plurality of impact writing elements and a paper receiving and retaining member, the member and the elements being relatively movable to make the elements capable, of writing on paper retained by the member along a line selected at will, a pair of supports extending vertically from the member and in spaced apart relationship along the member in the direction of the line of writing, a frame slidably carried by the sup-ports for movement toward and away from the member, extensions from the frame adjacent each end thereof, one of the extensions having a V-shaped guide plate mounted thereon, turning pins on each of the extensions, the plane of the plate intersecting transversely a line connecting between the pins, a shaft carried by the frame in a plane extending transversely of the line of writing, a ribbonspool on the shaft, and a ribbon fed from the spool around the pins, the plate acting to change the direction of the ribbon from its disposition on the spool to its disposition between the pins.

5. In combination with a writing machine having a plurality of impact writing elements and a paper receiving and retaining member, the member and the elements being relatively movable to make the elements capable ofwriting on paper retained by the member along a line selected at will, a pair of supports extending vertically from the member and in spaced apart relationship along the member in the direction of the line of writing, a frame slidably carried by the supports for movement toward and away from the member, extensions from the frame adjacent each end thereof, one of the extensions having a V-shaped guide plate mounted thereon, turning pins on each of the extensions, the plane of the plate intersecting transversely a line connecting between the pins, a shaft carried by the frame in a plane extending transversely of the line of writing, 'a pair of ribbon spools on the shaft, and a ribbon fed from the spools around the pins, the plate acting to change the direction of the ribbon from its disposition on the spools to its disposition between the pins..

6. In combination with a writing machine having a plurality of impact writing elements and a paper receiving and retaining member, the member and the elements being relatively movable to make the elements capable of writing on paper retained by the member along a line selected at will, a pair of supports extending vertically from the member and in spaced apart rela tionship along the member in the direction of the line of writing, a frame slidably carried by the supports for movement toward and away from the member, extensions from the frame adjacent each end thereof, one of the extensions having a" V-shaped guide plate mounted thereon, turning pins on each of the extensions, the plane of the plate intersecting transversely a 'line connecting between the pins, a shaft carried by the frame in a plane extending transversely of the line of writing, a pair of ribbon spools on the shaft, and a ribbon fed around the pins from one spool back to the other spool, the plate acting to erative position upon vertical movement of said frame, means for securing said frame in adjusted position relative to said posts and means actuated by longitudinal movement of the carriage for feeding the ribbon.

8'. A typewriter attachment for use in making a plurality of duplicate ribbon copies comprising a frame attachable as a unit to a longitudinally movable typewriter carriage, a pair of ribbon spools mounted co-axially and closely-adjacent at one end of said frame, a longitudinally movable vertical rod mounted adjacent said ribbon spools and engageable with a cam on the typewriter frame during longitudinal movement of the carriage and means actuated by said vertical rod for rotating one of said ribbon spools.

9. A typewriter comprising, in combination, a main frame, a cam on said main frame, a platen and platen carriage reciprocably mounted on said main frame, a frame mounted on said carriage, a pair of ribbon spools mounted co-axially on said second-mentioned frame, a vertical rod mounted on said carriage and engageable with said cam to be moved vertically thereby upon reciprocation of the carriage and means actuated by vertical movement of said rod for rotating one of said spools.

BEULAI-I LOUISE HENRY.

Images