US599863A - Type-writing machine - Google Patents

Type-writing machine Download PDF

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US599863A
US599863A US599863DA US599863A US 599863 A US599863 A US 599863A US 599863D A US599863D A US 599863DA US 599863 A US599863 A US 599863A
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carriage
arm
platen
bar
lever
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00Typewriters or selective printing or marking mechanisms, e.g. ink-jet printers, thermal printers characterised by the purpose for which they are constructed

Description

` (N0 Model.) 8 sheets-sheet 1.
T. OLIVER. TYPE WRITING MACHINE.
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8 Sheets-Sheet 2. T. OLIVER.
TYPE WRITING MACHINE.
(No Model.) s sheetssheet 3. T. OLIVER.
TYPE WRITING MACHINE.
No. 599,863. Patented Mar. 1,1898.
(No Model.) 8 Sheets-Sheet 4,
T. OLIVER. TYPE WRITING MACHINE.
No. 599,863. Patented Mar. 1895;*``
f/ EI y (No Model.) 8 Sheets-Sheet T.- OLIVER.
t N. WV E L Z m 0 m j l Z w m ,mk d UJ .m ...n n .N e Y T. Lb M a AP M G N m R W E P Y T.
' (No Mode-1.)' s sheets-sheen 6.
` T. OLIVER.
TYPE 'WRITING MACHINE.
(No Model.)` A 8' Sheets-Shet 7.
T- OLIVER.
TYPE WRITING MACHINE.
atented Mar. l, 1898.
8 Sheets-*Sheet 8.
(No Model.)
T. OLIVER. TYPE WRITINGMAGHINB.
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- letters printed will be constantly in view of `NITED STATES PATENT rricrj.
THOMAS OLIVER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-FOURTH TO FREDERICK A. EASTMAN, OF WOODSTOOK, ILLINOIS.
TYPE-WRITING NIACHINE.
SPECIFICATION forming part of Letters Patent No. 599,863, dated March 1, 1898. Application led August 28, 1897. Serial No. 649,831. (No model.)
To all whom it 11i/ry concern.:
Be it known that I, THOMAS OLIVER, of Chicago, in the county of Cook and State of Illinois, have invented Vcertain new and useful Improvements in Type-Writing Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.
This invention relates to improvements in type-writing machines of that kind shown in my prior patent, No. 562,337, dated June 16, 1896, and having a revolving platen or cylinder against which the paper is held during the act of printing, which platen is mounted in an endwise-movable carriage and wherein the types are mounted on swinging type-bats located above the platen and arranged to swing on horizontal axes arranged transversely to the platen, so that the types will strike downwardly upon the platen and the the operator. Several of the improvements herein described and claimed may, however, be applied to type-writing machines of other Y kinds.
In the accompanying drawings, Figure 1 is a view in central vertical section of a typewriting machine embodying my invention. Fig. 2 is a plan view of said machine with the paper-carriage removed to show the parts beneath the same. Fig. 3 is a view of the machine from beneath, showing the base-plate and the parts immediately adjacent thereto. Fig. 4 is a plan view, on an enlarged scale, of the paper carriage removed from the machine. Fig. 5 is a view in front elevation of the paper-carriage. Fig. 6 is a view of the paper-carriage as seen from beneath. Fig. 7 is a plan section of the carriage, taken on line 7 7 of Fig. 5. Fig. 8 is a detail end View of the carriage-frame, showing the devices for actuating the platen to effect the line-feed. Fig. 9 is an enlarged sectional View of the said carriage, taken on line 9 9 of Fig. 4. Fig. 10 is a longitudinal section taken on line 10 10 of Fig. 3, illustrating more in detail the devices for shifting the platen. Fig. 11 is a detail section taken on line 11 11 of Fig. 10,
. ber pawl.
illustrating the devices for varying the extent of line-feed. Fig. 12 is a detail section of the carriage, taken on line 12 12 of Fig. 5, showing the arms which support the paper-feeding rollers. Fig. 13 is a detail section of the carriage end plate, taken on line 13 13 of Fig. S, showing' the actuating-lever for the platenholding pawl. Fig. 14 is a view in perspective of the universal bar, the letter-spacing devices, and the ribbon-throw. Fig. 15 is a front elevation of l[he ribbon-throw and letterspacing devices. Fig. 16 is a plan section of the escape mechanism, taken on the line 16 16 of Fig. 15. Fig. 17 is an elevation with parts insection of the escape-wheel and stiff and limber pawls, taken on line 17 17 of Fig. 16.
Fig. 18 is a view in side elevation of the same l parts, showing a changed position of the lim- `Fig. 19 is a detail end elevation of the shifting frame which supports the carriage. Fig. 20 is a detail sectional view taken on line 2O 2O of Fig. 19, showing the rollerbearing which takes the end thrust of the shifting frame and the adjustable marginstop. Fig. 21 is a sectional plan view of the parts shown in Figs. 19 and 20, taken on line 21 21 of the same figures. Fig. 22 is a detail cross-section taken on line 22 22 of Fig. 2, showing the carriage-shift keys in side elevation. Fig. 23 is a detail view of the rockshaft which forms part of the carriage-shiftin g devices. Fig. 24 is a detail sectional elevation taken on line 24 24 of Fig. 3, showing the ribbonspool and ribbonfeeding devices. Fig. 25 is a detail section taken on line 25 25 of Fig. 24, showing in side view the worm-gear of the ribbon-feeding devices. Fig. 26 is a detail plan view of one of the type-bar frames and the ribbon-spool case thereon, with the cover of said case removed. Fig..27 is a view in side elevation of one of the ribbon-spool cases with the cover thereon. Fig. 28 isa detail side view of a part of one of the keylevers, showing the spring-arm by which the type-bar link is connected with said lever. Fig. 29 is a detail plan view of the parts shown in Fig. 28. Fig. 30 is a detail plan view of the parts below the carriage at the left-hand side of the machine.- Fig. 31 is a detail section taken on line 31 31 of Fig. 30. Fig. 32 is a detail section of the rear support ofl the IOD shifting frame, taken on line 32 32 of Fig. l. Fig. is a detail vertical section taken on line 33 83 of Fig. 32. Fig. 34 is a detail seetion taken through the line stop-block on line 3e 33t of Fig. 5. Fig. 35 is a plan view of the line stop-block removed from the machine.
As shown in said drawings, A designates the base-plate et the machine, consisting of a fiat horizontal flanged metal casting, and B B the keylevers, which extend from the front to the rear of the machine, above and generally parallel with the base-plate, and are pivotally supported at their rear ends by means of transverse pivots ZJ, supported in standards A on the base-plate. Said levers are divided into two groups, in cach of which the rear ends of the levers are brought together and pivoted to one of the standards, as clearly Seen in the plan view, Fig. 2. At their front ends the key-levers engage a vertically-slotted guide-bar A2, attached to the base-plate, Figs. l and 2.
The several key-levers are lifted and held normally in an elevated position by means of springs B, Fig. l, herein shown as made of U form and located between the base-plate and the key-levers.
C C indicate the type-bars, which are of loop or U form and are attached to such shafts C C', which are mounted in supporting-frames D D. The type-bars are arranged in two groups at opposite sides of the center of the machine, so as to swing on horizontal axes and act on a platen or paper-supporting roller E, which is located in position t'or the action thereon of the type-bars of both groups and is mounted in an endwise-movable carriage which is moved or shifted endwise to feed the platen and the paper thereon past the printing or striking point of the type-bars. The supporting-frames D overhang the platen E, Fig. l, and are attached to posts or uprights D on the base. Said type-bars are provided at their central parts with type-heads C2 and are actuated from the key-levers by means of upright links c, which are pivoted to crank-arms c on the type-bars. The supporting-frames D are provided with yokes D3, to which are attached inclined supports or rests D4, provided on their inner faces with impact-cushions C3, against which the rear sides of the type-heads rest when in their normal or retracted position.
The type-bar heads carry each a plurality of type-faces or types, preferably three, whereby an upper and lower case letter and a numeral or a punctuation-mark may be arranged on each type-head, the platen and its carriage being movable and controlled by suitable shifting devices, so that either of the types on the type-heads may be printed from at will.
As an improvement in the arrangement of the type-bars of a machine of the character described I purpose to arrange the same with their pivotal axes at an angle with respect to the central axis of the platen and with the axes of type-bars in the two groups at opposite angles, so that the axes belonging to the two groups diverge from each other from front to rear. This construction is plainly seen in the drawings, Fig. 2, wherein the supportingframes D D are angularly arranged with rcspect to the posts or uprights D', and the roek shafts or spindles C are correspondingly inelined.
The oblique arrangement of the type-bars described results in bringing the printing or contact point at which the types strike the platen rearwardly of the points at which the types rest when retracted. This construction aiords a wider space or opening at which the paper is exposed to the eye of the operator and enables more of the writing to be seen at one time. The construction described, morcover, by bringing the contact-point to the rear of the center of the type-bars affords more space for the carriage and the platen at the rear of the standards which support the bearings for the type-bars and thereby permits the use of a larger platen while making the machine lnore compact and stronger than in the case in which the type-bar axes are arranged at right angles with respect to the platen.
As an improvement in the means for transmitting motion from the key-levers to thc type-bars I have provided an elastic or resilient connection between said parts of a sufciently yielding character to soften or cushion the blow when the fingers strike the keys, but not so yielding as to interfere with the prompt and positive action oi' the type-arms. Asapreferred form of such elastic connection I interpose a spring betweenr the key-lever and the connecting rod or link c', and I make this spring in the form of a spring-arm B2, Figs. 28 and 2f), which spring-arm is arranged in a vertical plane and secured against the side of the key-lever, the spring-arm being rigidly attached at one end to the typelever and having its opposite or free end engaged with the link. The yielding or resilient connection in this instance is aiiorded by the yielding of the spring-arm edgewise in a vertical plane. The said springarm B2 is shown as attached to the key-lever at the rear of the links c and adjacent to the upper edges of the type-levers by means of rivets inserted through the rear end of the arm. Said arm is also shown as having at its free end a tooth or projection b', which projects through an eye in the lower end of the link, the upper type-lever bein gnotched or cut away adjacent to the end of the spring-arm to aiford room for the said eye. As a means for holding the link in engagement with the said tooth b the metal of the key-lever is slit on a line with the bottom of the notch, so as to form a tongue b2, the end of which stands opposite the end of the spring-arm and thereby holds the link from outward movement. Said tongue b2 may obviously be bent laterally to permit the disconnection of the link from or its connection with the spring-arm. To hold the spring-arm IOO IIC
from lateral movement or displacement, the same is shown as provided with a depending part or arm b2, in vwhich is formed a vertical slot h4 and through which is 4inserteda stud b5, which is secured in the key-lever, the said stud being loosely inserted in said slot to permit the end ofthe spring-arm to move freely in a vertical direction.
The employment of a spring or resilient connection between the key-lever and the typearm has the effect in all cases of making the action of the keys easier and more agreeable to the operator, but these advantages are especially marked in the case of metal key-levers, which, by reason of their inelastic quality, tend to give a harsh and unpleasant action if no such elastic connection be employed.
The paper-carriage frame in the preferred construction illustrated consists of two end plates E E', a longitudinal bar E2 at the lower front part of the frame which constitutes the rack-bar of the spacing mechanism, and a rear frame-bar E2, Fig. 6. The said carriage is mounted to slide endwise on a shifting frame, which consists of a transverse guidebar F, Figs. 1, 2, and 19, a horizontal yokev.piece F', extending rearwardly therefrom, a
horizontal rear guide-bar F2, and a horizontal rearwardly-extending guide-rod F2, which is attached to the rear end of the yoke-piece F and slides in a bracket F4, attached to the rear part of the base-plate.
The devices illustrated for sustaining the shifting carriage-frame consist of two rocking standards G G, which are located beneath the outer ends of the frame-yoke F', and a similar standard G,located beneath the guiderod F2, Figs. 1 and 22. Each of said rocking standards consists of a flat plate curved at both its upper and lower ends to form circular arcs which are segments of the same circle, so that when the shifting frame is moved backward or forward it will remain in the same horizontal plane. rllhe upper and lower ends of the standards are longitudinally grooved and engage at their upper ends with depending flanges g g on the ends of the yokepiece F and a similar flange g on the guiderod F3. At their lower ends the several standards are engaged with vertical flanges g2, which rise from plates G2, Fig. 22, which are adjustably attached to the machine baseplate. For adjustably connecting the said plates G2 with the base-plate tubular screwplugs g3 are inserted through the base-plate and bear against the plates G2, and holdingscrews g4 are inserted through the said plugs and are engaged at their upper ends with screw-threaded holes in the plates. The said standards are also provided at their ends with central notches g5, which are engaged by pins g, which are inserted through the ilanges g2 and serve to loosely confine the rockers and hold them from backward or forward movement. To hold the forward end of the shifting frame from rising, the yoke F is provided with horizontal arms f f, which extend outside of the standards D D,beneath' studs f time the weight of the rear part of the shifting frame will be carried entirely by the rocking standard G. For so supporting the bearing-ring F5 the opening or recess in the standard is made somewhat larger than the ring, and the ring is held or confined in position by means of two horizontal set-screws f2 f2, which pass through the sides of the standard and engage the outer face of the ring, and a third set-screw f3, which is inserted vertically through a removable cap-piece F6 and engages a holding-recess in the top face of the ring. The cap-piece F6 is connected with the standard at one side of the recess by a pivot f4, and is held at the opposite side thereof by a removable pivot-pin f5, so that said cap-piece with set-screw thereon` may be easily swung back or lifted for the purpose of disengaging the holding-recess in the ring, and thus permit the ring to be removed endwise out of the recess, so that the rod may be lifted therefrom in taking the shifting frame out of the machine. The lateral set-screws obviously afford lateral adjustment of said bearing-ring,while the top set-screw enables the ring to be adjusted vertically.
The backward-and-forward movement of the shifting frame is limited by means of adj ustable stops or nuts f6 f6, placed on a screwthreaded part of the stem F3 at either side of a standard F7, which rises from the base-plate and is provided at its upper end with a notch through which the stem freely passes.
In order to resist the tendency to endwise movement in the shifting frame due to the pull of the carriage-actuating spring upon the carriage, devices are provided as follows: Attached to the yoke F of the shifting frame, at a point near Vthe center of the machine and at the rear of the guide-rod F, is a metal block F8, Figs. 2, 20, 21, and 30, said block being provided with a horizontal groove or recess in its side face and having mounted in said groove or recess two antifrictional rollers f8, which project beyond the sides of the block and are adapted to bear against a vertical guide flange or plate F2, which extends from front to rear of the machine and is herein shown as formingpart of a block or standard F1", which rises from the base-plate of the machine. The block F8 isherein shown as attached to the yoke-piece F by means of a holding-screw ff, which passes vertically through the block into the said yoke-piece.
AThe upper end of the standard F10 is shown as provided with a ange F11, arranged par- IOO,
IIO
allel with the guide-ange F9 and forming a groove or recess in which the block FS rests and moves. The said flange F11 serves to hold the shifting frame from movement to the right, but is normally free from contact with the block F8, so as to avoid frictional resistance tothe backward-andforward movement of the shifting frame. In order to afford a means for adjustment of the guide plate or Hange F9 to the right or left, said guide-plate is separated from the body of the standard F10 by a vertical slot flo, Figs. 2O and 21, which reaches nearly to the baseplate, and a set-screwf11 is inserted through the guide-plate and into the body of the standard, the said slot giving sufficient elasticity to thelower part of the plate to enable the upper part of the same to be swung or moved to the slight extent needed by tightening or loosening said set-screwfu.
The paper-carriage is sustained at its front edge upon the guide -bar F by means of grooved supporting-rollers E4, Fig. 9, which are preferably two in number, Fig. 6, and are mounted on pivot-pins inserted through depending lugs on the bar E2 of the carriage, and the carriage is held from rising or being lifted from its place at its front edge by means of two lugs c e on the carriage-frame, which extend downwardly and beneath the guide-bar F. The rear part of the carriage is sustained by lneans of a supporting-roller II, Figs. l and G, which is mounted on an arm lI, attached to the rear frame-bar E3 of the carriage-frame and which rests and travels on the rear guide-rod I`2of the shifting frame in the endwise traverse of the carriage. To hold the carriage from rising at its rear part, a stop-arm II2 is secured to the rear framebar E in such manner as to extend beneath the said rod F2.
The shifting frame is so constructed that the platen E and its carriage may be shifted in either direction from a central point, the carriage being shifted baekwardly for one set of types or characters and forwardly for another set, while it remains immovable or in its central position for the third or intermediate set of types. To accomplish such movement of the carriage backward and forward from its central position, devices are connected with the shifting frame as follows:
I I', Figs. 2 and 22, represent shifting levers having their keys i t" in the keyboard, preferably at the left-hand side of the same, and pivoted at their rear ends to a standard I2, rising from the base-plate A, Fig. 2, said levers being guided in a vertical slot formed in the left -hand end of the guide bar A2. Mounted on the frame-base at the rear of the guide-plate A2 is a rock-shaft J, Figs. l, 2, 22, and 23, which extends from a point beneath the shifting levers to the center of the machine and is provided with two laterally-extending crank-arms J J' and an upwardlyextending crank-arm J2. The crank-arm J2,
Figs. 3 and 29, is located near the center of the machine and is connected with the shifting frame by means of a rearwardly-extending rod J3, Figs. i9 and 22, the rear end of which is pivoted to a depending arm F12 on the central part of the yoke F of the shifting frame, Figs. if), 20, and 2l.
The two crank-arms J J' extend one forwardly and the other rearwardly from the rock-shaft at an upward inclination and are provided at their ends with notches j j, Fig. 22, located in the end faces of the arms. On the base-plate of the machine adjacent to the ends of said arms are two stationary plates J "l J 1, provided with notches j'j, which are opposite the notches in the crank-arms when the shifting frame is in its normal position.
Pivoted to the shifting levers I I are two depending links J5 J2', carrying at their lower ends lateral studsj2j2, which are adapted for engagement with either the notches j or j'. Said notches are inclined or oblique, and lifting-springs I2 I2, applied to the shifting levers, normally retain the said studs in the outer or stationary notches When one of the shifting levers is depressed, the stud y2, carried thereby, first slides inwardly from the notch j' into the notch j in the end of the crank-arm, and after becoming engaged with said crank-arm acts on the latter to depress the same and thereby give movement to the rock-shaft and shifting frame. Provision is made for confining the stud within the notch of the crank-arm during the time said crankarm is moving downwardly from its normal position, that herein shown consisting of a curved guide surface or arm on the stationary plates J4, the same being curved concentrically with the rock-shaft and arranged to keep closed the open end of the notch throughout the swing of the crank-arm. Obviously the crank-shaft will always be free to be turned .in either direction upon the depression of either key, the shifting of the studs into the stationary notches leaving the crank-'arms entirely disconnected from the shifting keys except when one of the same is being operated.
The shifting levers are provided with stop projections fj, adapted for contact with a laterally-projecting arm F15 on the shifting frame, Figs. 22, 30, and 3l, so as to limit the movement of the same and hold the carriage immovable when in its central position. To hold the carriage for some length of time in its shifted position, a hand-lever K, Fig. 22, is arranged vertically between the levers Z and Z and is pivoted at its lower end to the guide-bar A2, said lever K being provided with outwardly-facing stop-shoulders located in such position as to hold either one of the spacing-keys depressed.
A spring-actuated mechanism is provided for giving motion to the carriage and also a spacing or feed device by which the carriage is allowed to move under the action of said IOO IIO
spring one space at each time a key is depressed for printing a letter, .these parts being made as follows:
K, Fig. 1, indicates a drum which contains Va carriage-actuatin g spring and has wrapped about it a strap K2, the free end of which is attached to a Vhook k3, Figs. 5 and 6, on the carriage-frame. Said drum is attached to the vertical shaft K4, which extends downwardly through'the base of the machine and is provided below the base with a ratchet-wheel and escapement-lever, (shown in Fig. 3,) by which the tension of the spring may be regulated.
Thespacing device for effecting the letterspacing operates in connection with the carriage rack-barE2,hereinbefore referred to, and is constructed as follows: g
L, Figs. 1 and 14, indicates an upright escape-wheel shaft mounted on the front of the shifting frame near the center ofthe machine.
Said shaft carries at its upper end a gear-pinion L', adapted to engage the rack-bar E2 of the carriage-frame, Fig. 1, and at its lower end an escape-wheel L2. the shaft L is adapted to move toward and from the rack-bar about an axis of oscillation located adjacent to the escape-wheel. The said shaft engages at its lower end a bearingaperture in a horizontal bar F13, which is attached to the lower end of the arm F12 on the shifting frame, Figs. l, 19, and 20, the bearing-aperture being made of slightly-clon gated shape to afford the necessary freedom'of movement in the upper end of Ithe shaft. The said upper end of the shaft L passes through a sliding block L3, which is mounted in a guideslot in an arm or bracket F14' onv the shifting frame. The bearing-block L3 is held normally in its rearward position, and the said pinion is retained in mesh with the rack-bar by means of a coiled spring L4, which is in-v serted in the slot of the bracket F11, between the plate, which closes the front end of the slot, and the said block L3.
To now describe the escape device by which the escape-wheel L2 is allowed to-turn step by step and the carriage allowed to advance under the action of the carriage-actuating spring when the several keys are operated, the same is constructed as follows:
Mis an oscillatory escapement-lever, Figs. 14, 15, 16, 17, and 1S, which extends from front to rear of the machine and is pivoted on the depending arm F12 of the shifting frame, so as to swing in a vertical plane, with its forward end at one side of and adjacent tothe escape-wheel L2. Said lever carries stiff and limber pawls m m, which are adapted for engagement with the teeth of the escape-wheel, so as to permit the wheel to turn tooth by tooth when the lever is oscillated. The stiff pawl fm has the form of a rigid projection or tooth on the end of the lever M, and the limber pawl m' is pivotally supported at itsupper end by means of a transverse pivot m3 upon the upper end of a standard on said The upper end ofl lever, so as to swing in a vertical plane parallel with the axis of the escape-wheel. The stiff pawl m is adapted for alternate engagement with and disengagement from the teeth of the escape-wheel by vertical movement or oscillation of the front end of the lever M, the said stiif pawl being adapted for engagement with the teeth ofthe wheel when the lever is elevated. The limber pawl is also adapted for engagement with and disengagement from the teeth 0f the escape-wheel by the vertical movement of said lever M, said pawl for this purpose being arranged above the stiff pawl lm., Fig. 15.
TheV vparts are so arranged that when the escapement-lever is depressed the lower part of the limber pawl fm. will engage the teeth of the escape-wheel, and when it is elevated the stiff pawl m will be engaged by the said teeth and the limber pawl will be released therefrom. A back stop m5 for the limber pawl is formed by means of an upward projection on the lever M, and a front stop for said limber pawl is formed by projection 'm6 on the upper end of the limber pawl, which is adapted for contact with the upper end 'of the standard 'm3, Fig. 17.v lThe limber pawl is held normally in contact with the-back stop by means of a suitably-applied spring, herein shown as having the form of a coiled spring m7, Figs. 16 and 17, placed around the pivot m3 of the limber pawl. The escape-wheel turns in a direction to carry the limber pawl toward the back stop m5 when engaged with said pawl against the action of the spring m1, as clearly seen in Fig. 17, and holds it in contact with the same. When the parts are at rest, the escapement-lever stands at the lower limit of its movement and one tooth of the escape-wheel rests in contact with the limber pawl, which holds the escape-wheel from turning. When the escape-lever is moved soas to lift its free end, the limber pawl will be lifted until free from the escape-wheel, at which time the tooth previously engaged by IOO IIO
the li mber pawl will come in contact with and 4 be arrested by the sti pawl m, while the limber pawl will be released and under the action of its spring m7 will return to its forward position, as seen in Fig. 18. Upon the subsequent descent of the escape-lever the teeth of the escape-wheel in contact with the stiff pawl willbe released, so as to permit the turning of the wheel; but in the descent of the escape-lever the next succeeding tooth will be caught by the descending limber pawl, which will be moved lthereby until arrested by the back stop, thus permitting the turning of the escape-wheel a distance of one tooth at each oscillation of the escape-lever. The said limber pawl is provided with a separate yielding lower part or section m8, which immediately engages the teeth of the ratchetwheel and is connected by a pivot m1 with the-m ain part of the limber pawl in such manner that it will swing forward from its operative position under the pressure of the escapewheel teeth, but will be held from any backward movement from such operative position by a suitably-arranged stop-arm m10, which extends rearwardly from the lower part m8 and bears against the rear surface of the upper part adjacent to the pivot connecting the same, as clearly seen in the drawings, Figs. 17 and 1S. The said yielding section m8 is held normally in its operative position by a suitably-applied spring, herein shown as having the form of a coiled spring m11, placed around the pivot mf and bearing at its ends against the two parts of the pawl. The said yielding part or section m8 being free to swing forward allows the escape-wheel teeth to move freely past the limber pawl if the escapewheel be turning rearwardly or in the reverse direction from that in which it turns during the usual operation of the spacing mechanism. The construction of the limber pawl with the separate yielding section therefore enables the carriage to be thrust backwardly or returned to its starting-point for a new line without disengaging the escape-wheel shaft from the rack-bar, thereby rendering the employment of the devices provided for this purpose unnecessary, except when it is desired to release the carriage and allow it to move backwardly for inserting a letter at a desired place in the line, which is done in making corrections or under like circumstances.
Now referring to the means illustrated for giving motion to the escape-lever, these parts are constructed as follows:
O, Figs. l, 2, 3, and 11, indicates a transverselyarranged vertically-movable spacebar located beneath and adapted for actuation by all of the key-levers. Said space-bar is attached to the rear ends of two arms O, Fig. l-l, the forward ends of which are rigidly attached to a rock-shaft O2, having bearings at its ends o in lugs o' on the base-plate, as seen in Fig. 1. The said space-bar O is connected with the said rock-shaft O2 not only by the arm O,located at the ends of said bars, but also by means of an intermediate bar O3, Fig. 14, which is intersected by a transverse frame-bar O4, these parts constituting a rigid space-bar frame. The escape-lever M is operated directly from the bar 0 by means of a slotted yoke O5, Figs. and la, which is pivoted to the rear end of the lever M and is provided in its lower part with a horizontal slot o2, adapted to receive a stud o3, which is secured in the rear end of said lever. Said yoke 0" has a vertical shank or stem O6, which has vertically-slidin g engagement with a stationary guide-block O7, Figs. l and 19, which, as herein shown, is formed on the rear end of the bar F13, Fig. 19. Through the medium of the slotted yoke O5 vertical movement of the space-bar is transmitted directly to the escapement-lever M, while backwardand-forward movement of said lever with the shifting frame is permitted by the said slot o2 without affecting the action of the escape devices.
The intermediate arm O3, which connects the space-bar O with the rock-shaft O2, as above described,aifords means for connecting a space-key P, Figs. 1,2, and 3,1ocatedin front of the keyboard, with the said escape devices. The said space-key P is attached to two parallel levers P', which are pivotcd at their rear ends to depending lugs P2 P2 on the baseplate (shown in Figs. 3 and 2l) by means of pivots p p, around one of which is placed a coiled springp, which acts to hold the spacekey normally in its elevated position. At a point forward of the pivot-lugs Piacross-bar P3, Figs. l and 3, rigidly connects the levers P', and said cross-bar is connected with the space-bar frame by means of a vertical bolt P4,having a nut at its lower end, which forms an adjustable stop against which the crossbar acts. f
rlhe space-bar frame is thrown upwardly and the space-bar held in contact with the key-levers by means of a volute spring P5, the inner end of which is attached to the rockshaft O2 and the outer end of which is connected with the base-plate by means of a screw P6, by which the tension of the spring may be adjusted. rl`wo upwardly-pressing springs PT Pare arranged beneath the spacebar O in position to be struck by said bar when the same is depressed,said springs serving to gradually arrest the downward movement of the space-bar when the keys are struck. The springs P7 PT are shown as made of U form, with their lower horizontal arms secured to the base-plate beneath the same and their upper arms apertured andengaged with vertical guide-posts P8 PS on the base-plate. Adjustment of the tension of said springs is afforded by a cross-bar P, which extends beneath and in contact with the lower parts of the springs and which is connected with the base-plate by means of an adjusting-screw p2.
Devices are provided for moving the upper end of the shaft L and the pinion L thereon away from the rack-bar of the carriage for the purpose of releasing said carriage from the spacing devices when it is desired to shift or move the carriage backward to insert a letterin makin g corrections or at other times, as follows: Above the rack-bail?, Figs. l, 7, and 9, is a longitndinally-arranged horizontally-movable releasing-bar Q, arranged to slide obliquely on the rack-bar and held in place thereon by studs q `q,which engage oblique slots q q/ in the said bar. The outer or working edge of the bar is adapted to engage an antifriction-roller Q', Fig. 1, mounted on the upper end of the shaft L, above the said pinion L,whcn the said bar is advanced. A suitablyapplied spring, in this instance having the-form of a U-spring q2, is engaged at one end with a stud on the rack-bar and at its other end with the releasing-bar and serves to throw the latter cndwise and rearwardly, and thereby tends to hold it in its retracted position. For actuating said releas- IOC IIO
ing-bar an endwise-sliding trip-rod Q2, Fig. 7, is arranged longitudinally above said releasing-bar, said trip-rod extending beyond the end of the carriage at the left-hand side of the machine and having on its end a iinger-piece or button Q2. The trip-rod is held in place by a stud g3 in the rack-bar, which engages a slot Q4 in the trip-rod, and the inner end of the trip-rod abuts againsta shoulrod the pinion will be released from the rackbar and will remain free therefrom, and the carriage may be moved freely so long as such pressure is maintained.
As an improved construction in automatic line-spacing devices for the platens of machines of that class in which the platen is turned automatically a line-space at a time at each movement of the carriage backward to a starting-point I have provided devices which are more clearly shown in Figs. 8 to 13 and are constructed as follows: Mounted on the platen-spindle R is a ratchet or gear wheel S, through which the platen is turned for line-spacing and by which it is held from turning as the line is being printed, said gearwheel being located outside of the end of the plate of the carriage-frameat the left-hand side of the machine. An oscillating platenactuated arm S' is-mounted on the carriage concentrically with the axis of thev platen, said arm preferably being mounted on the said spindle. In connection with said arm is employed an oscillating gear segment S2, which is also mounted concentrically with the axis of the platen, preferably by being also mounted upon the said spindle R. Said gearsegment S2 has a bearing-aperture s, through which the outer portion of the arm S' passes, said outer portion being parallel with the said spindle-arm, Fig. 10. The gear-segment S2 is arranged concentrically with the platenshaft and intermeshes with another gear-segment S5, which is mounted to swing horizontally on the lower part of the carriage-frame,
the same being herein shown as supported upon a pivot-stud s', which is secured in the rack-bar E2 adjacent to the end plate of the carriage-frame. rlhe platen-actuating arm S', together with the gear-pinions S2 S3, is moved in oneA direction by a spring, herein shown as having the form of aleaf-spring S4, secured to the bar E2 and bearing at its free end against a rigid arm s2 on the segment S3. Said parts are moved in opposition to'the said spring'by means of a cam-plate S5, Figs. 2 and 80, which is mounted on the carriagesupporting frame and is provided with an Oblique edge s3, adapted for engagement with oblique surface 33 in the backward movement of the carriage, and said swinging movement of the gear-segment S3 will be transmitted to the gear-segment S2 and from the same to the actuating-arm S', which engages said gearsegment. Said 'actuating-arm S' is movable endwise with respect to the gear-segment S2, and the free end of said arm is so arranged that when the arm is thrust inwardly it will engage one of the` notches of the ratchetwheel S, but when retracted, which is its normal position, will be free from said ratchetwheel. The said actuating-arm is moved or shifted through the medium of a knob or handle R', which is mounted on the pla-tenspindle at the left-hand side of the machine and which has sliding engagement with the said spindle. The said knob R' is secured to a sleeve r, which slides endwise on the spindle,'and is held at the outer limit of its movement by a spring r', herein shown as made of coiled form and inserted between the outer end of the spindle and the outer closed-end of the sleeve r. Said sleeve r is shown as provided with a separate inner tubular section r2, which is secured in the same by a screw r3 and which is provided at its outer end with a iiange, between which and the end of the sleeve r is formed an annular groove, in which is inserted an integral sleeve on the actuating-arm S', it being understood that said arm is adapted to swing or turn loosely on the sleeve, but is moved endwise therewith, when pressure is applied to the knob for the purpose of moving the carriage. Said spring r' is weaker than the carriageactuatingspring, so that the knob will be moved before the carriage is moved when pressure is applied to the knob. The platenactuating arm is held normally disengaged from the ratchet-wheel by the said spring, which holds the knob or handle at the outer limit of itsr movement; but said arm is thrust inwardly in the act of moving the carriage backward to its starting-point, and this engagement will continue while the carriage is being moved toward the right and until the gear-segment S2, through the action of the second gear-segment and cam-plate, has been moved or swung laterally, as above described; As the actuating-arm is thus swung or moved it will carry with it the ratchet-wheel, and the platen will be thereby turned the desired distance for effecting the line-spacing. As
soon as the carriage reaches the point for beginning a new line it will of course be held from returning by the action of the letterspacing devices, and upon relieving the knob or handle from the pressure of the hand the said knob and the actuating-arm will .be thrown outwardly by the knob actuating IOO IIO
spring, thereby disengaging the arm from the ratchet-wheel and leaving the said arm free to swing backwardly to its original position in the subsequent forward movement of the carriage. v
The construction described not only affords a simple means for automaticallyturning the4 platen or line-spacing, but it has the advantage also of leaving the platen free to be rotated by hand for adjusting the paper with respect to the striking-point of the types at the time the carriage stands at the extreme limit of its movement to the right and while the actuating devices are still engaged with the cam-plate S5, it being obvious that as soon as the actuating-arm has been released from the ratchet-wheel the automatic line-spacing devices will be entirely disconnected from the said ratchet-wheel, and the same and the platen may be freely turned.
The extent to which the platen is turned for line-spacing is determined by the extent of oscillatory movement of the actuating-arm, and provision is made for giving a variable line-spacing by varying the distance through which the actuating-arm is allowed to swing backward under the action of its actuatingspring S4, the saine consisting` ot' a movable stop which limits the rearward swing of the actuating-arm after it has been advanced to turn the platen. Such movable stop consists of a pivot-block S, S and 1l, which is mounted on the pivot-stud s, secured in the end plate of the carriage, said block S6 being adapted for con tact with a pin or lug 57 on the inner face of the gear-segment S2 and having lateral and end contact-surfaces, either ot which may be brought into position for engagement with said pin, so that the block forms a stop which when in one position affords a much greater swing to the actuatingarm than when in another position. As a means of actuating said block S6 a gear-segment ST is attached thereto, said gear-segm ent intermeshin g with a second gear-segment S8,
vwhich is mounted eoncentrically with the platen-shaft in position to intermesh with the iirst gear-segment. Conveniently the two gear-segments referred to are located in a space between the ratchet-wheel S and the adjacent end plate ot the machine, andthe gear-segment SS is mounted directly on the platen-spindle. The second gear-segment is provided'with a hand-lever 38, which projects outwardly beyond and above the ratchetwheel in a position convenient for the finger of the operator. Suitable means are provided for limiting the movement of the hand-lever, the same consisting, as herein shown, of a projection s on the inner face of said lever, which projection is adapted for contact with the edge of the end plate E at either side of the same. (See Figs. 4E and ll.) These parts are so arranged that when said lever .ss is at one limit of its movement the block will present its side surface, giving to the actuating-arm a movement sufficient for a full-line space, and when at the other limit of its movement the block will present its end surface and give a shorter stroke for a half-line space.
In connection with the line-spacing device described a holding-pawl S, held by springpressure in contact with the ratchet-wheel S, is employed to retain the platen from turning while the printing is being accomplished, said holding-pawl being shown as consisting of an L-shaped lever, pivoted on a stud .SW and provided with an arm S10, 0n which a spring S11 acts in a direction to hold the free end of the pawl, which carries an antitrictionroller s, against the teeth of the ratchetwheel. In order to enable the platen to be turned or adjusted independently of the linefeeding devices, the ratchet-wheel is connected with a spindle by a friction device of the kind shown in a prior patent, No. 562,337, granted to lne June 1G, 1896, and consisting of an inner part S12, which is rigidly attached to the spindle R, an outerannular part S13, having a conical contact-surface engaging the periphery of the inner part, and a iiat spring s, secured to the inner part and having spring-arms which bear against the outer part. In connection with such frictional device and the holding-pawl S9 a device is provided for holding the said pawl so firmly against the ratchet-teeth as to prevent said ratchet-wheel from turning, so that by the application of suitable force to the platenshaft through the hand of the operator applied to the knob R2 at the ri ght-hand end of the platen-spindle the platen may be turned while the ratchet-wheel remains stationary. Such holding device for the pawl consists of a hand-lever S12, which is mounted on a pivotstud S15, and to which is attached a cam arm or projection S16, arranged to act upon the pawl in such manner as to hold the same in engagement with the ratchet-wheel so long as pressure is maintained upon the hand-lever in a direction to hold the cam-arm against the pawl. Said cam-arm is so disposed with relation to the holding-pawl that no permanent engagement or interlocking of the calnarm with the pawl will take place, so that the holding-pawl will be free to move and permit the turning of the ratchet-wheel so soon as the hand is removed from the lever, thereby insuring that the parts will be restored to condition for operation as soon as the hand-lever is relieved from pressure.
The spring S11 is shown as made'in the form of a C-spring, which is connected at one end with a stud s on the end plate of the carriage and is engaged at its other end with the arm S10 of said pawl, said spring serving to retain the holding-pawl against the ratchetwheel with sufficient force to prevent accidental turning of the platen, as has heretofore been common. In order, however, to enable the holding-pawl to be entirely disengaged from the ratchet-wheel when it is desired to rotate the platen in making corrections, lling blanks, the., the lever S12 is pro- IOO IIO
ISO
. tion.
-sls
vided with a second' cam-arm S17, which is adapted to bear against the'arm S10 by a backward movement of the hand-lever, this cam projection being so arranged that it will be locked in engagement with the said arm S10 when the hand-lever is thrown backward, so that a constant pressure on the hand-lever will not be required to retain the locking-lel ver away from the ratchet-wheel.
As ameans of holding the hand-lever S12 in an intermediate position and thereby leaving the holding-pawl free to move as the ratchet-'wheel is turned I have provided said hand-leverv with a spring-plug 318, Fig. 13, which spring-plug is adapted to engage a conical recess in the outer face of the carriage end plate at the time when the hand-lever is in an intermediate position or free from both arms of the holding-pawl.
As an improved construction in the margin stop or device for limiting the rearward movement of the carriage in returning it to its starting-point, by which the width of the margin left on the sheet in printing is determined, devices are provided as follows:
T is a horizontally-arranged rod, which is mounted on the shifting or carriage-supporting frame at the rear of and parallel with the carriage-supporting guide-bar F, said rod T` being mounted in guide-lugs t t, formed upon the said frame and being adapted to move endwise in said guide-lug and to also turn or rotate therein. Said rod T carries a stop-arm T', which is adapted for contact with the arm or projection T2 on'the bottom of the carriageframe, said arm or projection being herein shown as being cast integral with the lower frame-bar E2 of the carriage. The shifting of said rod endwise in its bearings affords a means for changing the length of the line of the Width of the margin at the left-hand side of the sheet. As a means of adj ustably holding the rod in place it is provided at one side with a series of teeth or notches lf2, adapted for engagement with a spring-actuated pawl T2, which bears against the notched side of the rod when the stop-arm is in operative position, but rests in contact with the smooth part of the rod and leaves the same free to be moved endwise when the rod is turned to carry the said arm out of its operative posi- Said spring-detent T2 is herein shown as consisting of a plate-spring secured by screws at its rear end to the top of the shifting frame and extending at its front endbeneath the rod T, the said front end of the spring having a turned-up edge 153, Fig. 20, which is adapted for engagement with the notches of the -rod T when the rod is turned to bring the notches downwardly. For convenience in adjusting the said rod T the same is shown as provided with a handle T3 at its outer end and as being provided witha scale or index corresponding withthe letter-space intervals ofthe machine, said scale or index acting in connection with a pointer t4 on the right hand end of the shifting frame.
'said frame at their rear ends.
My-invention also embraces an improved construction'in the paper-carriage, intended for facilitating the insertion and adjustment of the paper and the holding of the same in contact with the platen, so that the paper will move with the platen as the same is turnedvto accomplish the line-spacing.
The parts above referred to are-shown more fully in Figs. 4: to l2 and are constructed as follows: To hold or grip the paper against the lower surface of the-platen where the advance edge of the paper first comes in contact with the platen in the Vact of inserting the sheet, l employ a presser-roller E5, which is mounted at its ends in bearing-blocks e', attached to the forward and free extremities of the horizontally-arranged spring-arms E6 E6, which are located at opposite ends of the carriage-frame and are rigidly attached to Said springarms serve to hold the lower presser-roller against the paper and to press the same firmly into contact with the platen. To release the said lower presser-roller from contact with the platen, as necessary for adjusting the paper after insertion and sometimes for convenience for inserting the advanced edge of the paper, a rock-shaft E7 is mounted in the end frame-plates of the carriage and extends longitudinally thereof above the spring-arms. Said rock-shaft is provided near its ends with cam arms or projections e2, which are located over and adapted to act upon the spring-arm in a manner to depress the same when the rock-shaft is turned in a direction to carry the cam-arms against the spring-arms. Said rockshaft is provided at one end with a hand-lever E8, by which it may be conveniently turned when desired. A guide-plate E, Figs. 7 and 9, for the paper is also attached to said springarms, said guide-plate extending forwardly and upwardly from the said presser-roller for guiding the paper after it leaves the said roller. contact with the platen as it passes upwardly at the front surface of the same toward the striking-point of the type two other pressurerollers E10 and E11 are located at the front of the platen above and below the center line ofy the same. The uppermost of said front rollers E10 is mounted at its ends in two upright supporting-arms e5, Fig. 12, the lower ends of which are pivoted to the machine-frame near the bottom of the same in such manner as to permit the said upper roller to move inwardly and outwardly or toward and from the platen. As shown in the drawings, the said arms e5 are mounted on pivot-studs e.6 on the inner faces of the end plates of the carriage, the stud on the left-hand end plate being tubular for the passage of the trip-rod Q2, as seen in Fig. 7. The lowermost of the said two front rollers is j ournaled at its ends in two supportingarms e7, which arms are pivoted at their upper ends to the inner faces of the supporting- IOO IIO
roller, the pivotal connection being formed by means of bearing-pivots c5 on the ends of a horizontal rod E12, which extends across the carriage below the roller E10. Said bearingpivots pass through the upper ends of the said arms e5 and engage the arms e5. Said rod E12 affords a support for the upper edge of a guideplate E15, which guide-plate extends between the rollers E10 and E11 and serves to guide the advance edge of the paper after it passes the lower roller E11, so that it shall properly pass around the front surface ofthe platen and beneath the upper roller E10. For holding both of said rollers E10 and E11 against the platen with a spring or yielding pressure two leafsprings E11 are employed, said springs being attached to the carriage and their lower ends with their upper free ends bearing inwardly upon the supporting-arms c7 of the lowermost of the rollers at points between the ends of said arms. The springs E11 thus arranged operate to throw both sets of arms inwardly toward the platen by reason of the fact that they bear against the supporting-arms of the upper roller, below the pivots of the latter, as stated. Adjustable connection of said leafsprings with the carriage is formed by means as follows: The lower parts of said springs are bent or carried inwardly over the rack-bar E2 to points inside of the same and are there engaged with pivot-studs e9, Fig. 12, which are secured to the ends of the rack-bar E2. rlhe portions of said springs which extend over the rack-bar are engaged by set-screws e111, which pass through said bar and bear against the lower surfaces of the said springs, the screws thus arranged serving to hold the upper ends of the springs against the rollersupporting arms e1. By raising or lowering the set-screws the pressure of the free ends of the springs may be increased or diminished, it being obvious that the said springs will swing upon the studs e'q when the set-screws are thus moved and thereby effect a movement of the free ends of the springs inwardly or outwardly, according to the direction in which the set-screws are moved.
A strip E15, marked with a scale, is mounted on the free ends of the supporting-arms e5 of the upper front roller, said arms being extended past the bearings of the said upper roller a sufficient distance to afford a proper support for the said strip. The strip is pivotallyeonnccted at its ends with the arms, so that its free edge may adjust itself with respect to the surface of the platen. Above the platen are located two paper-guides E1, which are arranged obliquely and extend from points at or near the top of the roller rearwardly andinwardly, the outer ends of said inclined guides being attached to transverse guidearms E11, which extend to and bear at their front ends upon the scale-bar E15. The inclined guides E1G and guide arms E17 are mounted upon a supporting-rod E15, which is attached to and extends between the carriage end plates at the rear of the platen, the said guides being provided with two sockets e111 e11, which embrace said supporting-rod and which have endwise-sliding but non-rotative connection with the rod, so as to retain the guidearms in place over the platen, the rod and sockets preferably bein g made of square form for this purpose. The guide-arms E17 serve to guide the side edges of the paper as it advances over the top of the platen. The oblique guides E11Jl serve as guides for the forward edge of the sheet, the same, owing to their oblique arrangement and the attachment of their outer ends to the guide-arms, serving to insure that the front edge of the paper shall advance without catching or being retarded should it bend or buckle at its.
central part.
With respect to the means used on the paper-carriage for guiding the paper to the presser-rollers during its insertion and at other times the machine shown is provided with devices as follows:
E1, Fig. 0, is the upper and E211 the lower paper-guide, both made of sheet metal in the usual manner. The lowerpaper-guide is supported by the attachment of its ends to the end plates of the carriage-frame and is l0- cated in an inclined position, with its lower and forward edge near the lower presserroller E5. The upper paper-guide is conveniently made of curved form and attached at its ends to the carriage and plates, with its front edge near the platen.
V V are the ribbon-spools,which are re movably secured to the upper ends of upright shafts t v, Figs. 25, 26, and 27, which shafts are located outside of the standards D, said spools being so arranged that the ribbons extend over the top of the platen and through the several type-bars, Fig. 2G. For securing the spools to the shaft n each shaft is provided with a collar e', carrying an upright eccentric-stud U2, which is adapted to enter a vertical hole U5 in the spool to afford driving connection between the shaft and the spool. The ribbon is wrapped around the spool V, and the said ribbon and spool are inclosed in a stationary cylindric casing V', which is provided with an exit-slot V2 for the ribbon. Said `casing is preferably provided with a removable top or cover V5 and is secured to the frame D of the type-bars by means of screws, Figs. 2G and 27, or other suitable securing means. The ribbon is guided after its exit from the Casin g V by means'of a slotted guide V", the same consisting of a strip of metalbent into U form and provided with a shank by which it is attached to said casin g V The lower ends of the shafts i; extend below the base-plate of the machine and are there engaged by driving connections arranged to operate upon either one or the other of the shafts, so that the direction of movement of the ribbon may be reversed whenever the ribbon has become entirely unwound from one of the spools. Such ribben-spool-actuat- IOO IIO
ing mechanism is shown more clearly in Figs.
3 and 25 and is constructed as follows:
V5' is a horizontal shaft arranged transversely of the machine and mounted in bearings r1, so as to rotate and also slide endwise thereon. The upright shafts V are provided on their lower ends with bevel gear-wheels o5, adapted to intermesh with similar gear-wheels U5 on the ends'of the shaft V5. Said shaft is made, however, of such length that only one pair of the gear-wheels 'U5 e can be engaged with each other at one time, the engagement of one bearing or the other being accomplished by endwise shifting of the shaft. To provide means for shifting said shaft endwise, a lever V, Fig. 3, is pivoted beneath the base-plate A on a bracket v1,- said lever o6 being provided with a forked end which engages a collar @s on the shaft V5. The front end of said lever is provided with a knob @7,which rises through a slot in the base-plate, near the front thereof, so that the lever can be easily moved by the operator. A detent-spring V8 is attached to the base-plate and engages at its end with one of a series of notches o9 in the end portion of the lever lu6,vso as to hold said lever from movement except when intentionally shifted by the hand of the operator.
Rotary motion is given to the shaft V5 from the intermediate bar O3 of the space-bar frame by means as follows, Figs. 24 and 25: Mounted on the shaft V5 is a toothed wheel V1,which forms part of a worm-gear and is -engaged with a worm-shaft V10, located above the said gear-wheel and at right angles with the shaft V5. Said worm-shaft is mounted in depending arms v10, attached to the base-plate, and is provided between said arms with a ratchetwheel @11. Attached to said bar O3 is an arm V11, which carries two spring-pawls @12 and @13. Said paWls rise from the arms V11 at opposite sides of the ratchet-wheel 1111, one of said pawls, U12, having a plain end and the other, U13, a hooked end, so that one pawl will engage and turn the ratchet in the upward movement of the spacing-bar frame and the other pawl will actuate orturn the ratchet in the descent of said frame.
It follows from the above-described construction that the shaft V5 and one of the spool-shafts will be continuously turned as the space-bar is moved through the actuation of the keys, motion being transmitted to the space-bar from the worm-shaft and the wormgear through the shaft V5 in obvious manner. The worm gear-wheel V"J is made of sufficient thickness to permit e'ndwise movement of the shaft V5 without disengaging said Wheel from the worm-shaft.
The inking-rbbon is provided with guides adjacent to the printing-point, which guides are adapted to hold the ribbon over the point As an improved construction in the ribbonthrow or device for actuating said guides I employ the construction which is illustrated in Figs. 1, 14, and 15 and is as follows: A rigid supporting-arm W is attached to the shifting carriage-frame and extends to a point in front of the platen. The upper part of said supporting-arm is provided with a horizontally-extending portion W', to which are pivoted two links w w, Which are of equal length and are arranged one behind the-other and parallel with each other. To the upper ends of said links are pivotedahorizontallyarranged guide-plateW which extends toward the platen and is provided with two ribbon-guides or guide-loops 'w' w', located at opposite sides of the printing-point. The pivoted links described afford movement of the gu ide-plate horizontally toward and from the printing-point, while maintaining the saidv which extends downwardly to and has pivotal engagement with an arm to2 on the escapelever N. The parts are so arranged that when any key is depressed and the escape -lever thereby moved the `upper ends of the links and the guide-plate thereon willbe swung toward the platen, and the inking-ribbon will be carried thereby over the printing-point,
and when the keys are released and the typebars rise said guide-plate and ribbon will be drawn backwardly away from the platen.
On the front frame-bar E2 of the carriage is located an adjustable line-stop, combined with a vbell actuating stop, which is constructed as follows: X, Figs. 5, 84, and 35, is a sliding line-stop block, which is mounted on a depending longitudinal iiange E21,located on the right-hand end of the said bar E2, and is provided with a tooth Q0 at one end adapted for engagement with either one of a series of notches in the lower edge of the ange E21 and also with a spring-arm fr', which engages a groove in the rear surface of said flange and acts to hold the tooth yieldingly inengagement with the notches in the flange. The slide-block is preferably made of inverted- U form, so as to embrace the lower edge of the flange E21, and the spring-arm is arranged on the inner face of the rear part of the block, with its rear end free and capable of movement in a vertical plane, so that the tooth @c may be pushed down free from the notches in the flange against the tension of the springarm, which remains constantly in engagement with the said groove. Said slide-block X projects below the fiange E21 and at its left-hand end is adapted for contact with the arm or rook IIO
bracket F1'1 on the front edge of the shifting frame. The said slide-block also carries at its front side a bell-actuating stop X2, which is adapted to engage the upper end of a bellhammer lever Y, Figs. 9 and 19, which is located in the path of said arm. The bell-hammer lever Y is shown as attached to a rockshaft Y', mounted in the shifting frame and provided at its rear end with an arm Y2, carrying a hammer ly, adapted for contact with a bell YS, which is secured to a bracket on the rear part of the machine-frame.
I claim as my inventionl. In a type-writer, the combination with key-levers and a platen of U-shaped typebars of graduated lengths, whose closed or looped ends carry type-heads, said type-bars being arranged in two groups with the axes of the type-bars in each group parallel with each other but with the axes of the type-bars in the two groups rearwardly divergent.
2. The combination, with a shifting frame and a carriage mounted thereon,of a rock-shaft operatively connected with the shifting frame and provided with two crank-arms, Stationary guide-arms having curved guide-surfaces concentric with the crank-arms and independently-movable shifting-levers provided with pivoted actuating-links, said crank-arms and guides being provided with notches, and the said actuating-links having studs adapted to engage said notches.
3. The combination of a shifting frame provided with a rearward extension or stem, of rocking supports sustaining the carriage and a guide for the said stem, comprising a stationary standard, a guide-ring for the stem which is confined from lateral movement in the standard, and adjustable means limiting the upward movement of said ring.
4. The combination with the shifting-frame stem, and standard on the frame, of a rocking standard which supports the said stem, a guide-ring engaging the stem, a standard supporting the ring, means on the standard affording lateral adjustment of the said ring in the standard, and a set-screw acting on the ring to limit its upward movement.
5. The combination with the shifting-frame stem, and standard on the frame, of a rocking standard which supports the said stem, a guide-ring engaging the stem, a stationary standard on the frame, a guide-ring engaging the stem, said ring being held from lateral movement by the standard, and a removable cap on the standard, by which the ring is removably confined in engagement with the standard.
G. The combination with a paper-carriage, of a horizontally-movable shifting frame supporting said carriage, an upright shaft on the shifting frame provided with a pinion on its upper end adapted to engage said rack; said upper end of the shaft being movable toward and from the rack, an escape-wheel on the lower end of the shaft, an escapement-lever mounted on the shifting frame and provided with stiff and limber pawls, a vertically-movable spacing-bar, and a yoke-piece, pivoted to the escapement-lever, and having vertically-sliding connection with the shifting frame, said yoke-piece having slotted connection with the spacing-bar.
7. The combination with a platen,a ratchetwheel and a frictional connection between the ratchet-wheel and platen, of a spring-actuated holding-pawl engaging the ratchetwheel, and a pivoted holdin g-detent provided with a hand-lever and adapted to engage the holding-pawl to throw it into contact with the ratchet-wheel, said detent being so disposed with respect to the said pawl as to prevent the parts from having locking engagement with each other.
8. The combination with a platen,a ratchetwheel, and a frictional connection between the ratchet-wheel and platen, of a spring-actuated holding-pawl engaging the ratchetwheel and a holding-detent provided with a hand-lever and two opposite arms or projections one of which is adapted to engage the holding-pawl to force it against the ratchetwheel and the other of which engages an arm on the holding-pawl to hold the latter away from said wheel.
9. The combination with a platen,a ratchetwheel and a frictional connection between the ratchet-wheel and platen, of a spring-actuated holding-pawl engaging the ratchetwheel, a holding-detent provided with a handlever and two opposite arms or projections adapted for engagement with the holdingpawl and an arm on the same, and a springdetent applied to retain the holding-detent normally in its central position.
l0. The combination with an endwise-movable carriage and a rotating platen thereon, of automatic line-spacing mechanism, comprising a ratchet-wheel on the platen-shaft, an oscillatory, endwisc-movable, spring-actuated, platen-actuating arm, a sliding knob on the platen-shaft by which lthe actuatingarm is given endwise movement, an oscilla- IOO IIO
tory gear-segment mounted concentrically with the platen-shaft and with which the actuating-arm has endwise-sliding engagement, a second oscillatory gear-segment, mounted. on the carriage and intermeshing with the rst-mentioned gear-segment, and means on said second gear-segment operating to give movement thereto when the carriage is moved endwise.
1l. The combination with an endwise-movable carriage and a rotating platen thereon, of automatic line-spacing mechanism, comprising a ratchet-wheel on the platen-shaft, an oscillatory, endwise-movable, spring-actuated platen-actuating arm, a sliding knob on the platen-shaft by which the actuating-arm is given endwise movement, an oscillatory gearsegment, mounted concentrically with the platen-shaft and with which the actuating-arm has endwise sliding engagement, a second oscillatory gear-segment, mounted on
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