US565716A - bab-ron - Google Patents

Description

(No Model.) ESh'ts-Sheet; 1.

.W. JQBARRON.

TYPE WRITING MACHINE.

No. 565.716. Patented Aug. 11 1896.

WITNESSES: I INVENTDR S BY ATTORNEY T Noam: PETERS cc PHOTO-LUNG" wAsnmm'ou, n c

(No Model.) 5 Sheets-Sheet 2.

W.-J. BARRON. TYPFWRITING MACHINE.

Patented Aug. 11, 1896.

(No Mode l.) Y 5 Sheets-Sheet 3.

W. J. BARRON. TYPE WRITING MACHINE.

No. 565,716. Patented Aug. l1; ,1896.'

This is' a samplq of. the w v WITNESSES: I INVENTOR ATTOR N EY 6 Sheets-Sheet. 4. v Q

R m 3 m R 0 .AN B H M W m Y (No Model.)

N0.'56-5,716. Patented Aug. 11, 1896.

R v w W l %w w ma M Q. 8

FEE-l5 JM JM ATTORNEY W. J. BARRON. TYPE WRITINGMAGHINES (No Model.) a sheets-sheep;

No. 565,716 I 2 PattedAug.11 ,1896'T' WITNESSES: IN'VENTOR BY k TTORNEY UN TED STATES.

PATENT Erich.

WALTER J. BARRON, OFBROOKLYN, new YORK, nssienon TO THE UNION TYPEWRITER COMPANY, QFNEW YORK, N., Y.

TYPE- WRITIIQlG MACHINE.

SPECIlFICATION forming part of Letters Patent No. 565,716, clatedAugust 11,1896.

' i APplioationtlgd September 20,1894. Seria1N0.523,593. iNdmodel.)

Be it known thatl, WALTER J. BARRON, a citizen'of the UnitedStates, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in .Type-WVriting Ma: chines, of which the following is aspeciiication.

My improvements relate tomeans for moving the platen and the paper thereon endwise for the purpose of adjusting the, latter correctly with reference to the printing-point for making corrections; to a pointer or, means for indicating the printing-point; to means for locking the platen in its upturned position for the purpose of steadying the same and facilitating erasures, corrections, due. to

means for effecting double letter-spacing simultaneously with the impression of the last letter. of a word; to auxiliary means .for ef fecting singlespacing at the end of a word when this maybe desired; to means for ar resting the travel of thepaper-carriage; to means for preventing type-impressions when the carriage has come tothe end of theline,

and to means for enabling further progress of the. carriage, after the operation ofthe last-mentioned means, for the printing of additional characters.

My improvements consist in the various features of construction and combinations of devices hereinafter more fully described, and particularly pointed out in the appended claims. Q

In the accompanying drawings, Figure 1 is a top plan view of a Densmore type-writer embodying my improvements, some of the parts thereof being omitted for the sake of clearness, and the paper-table being broken away at two points to show the construction beneath. Fig. 2 is a central vertical section thereof.

platen, and showing moreparticularly the;

carriageescapement mechanism, the carriage-arresting means, and the type-locking Fig. 3, is a front elevation of the 1 same with the platen turned or rolled up to 1 Fig. 4 is a detail view means, &c. Fig. 6 is an enlarged detail back view of the escapement mechanism in its normal position. Fig. 7 ,is a similar view with, the parts shown in the positions they occupy whenthe carriage feeds a single letter-spaceonly. Fig. 8 is a similar view with the parts in the positions they assume when the carriage. feeds a doubleletter space distance. Fig. ,9 is a similar View showing a 6 0 modification of the spacing mechanism. Fig.

10 is an enlarged detail view, in top plan and partly in section, of the escapement mechanism, carriage-arresting means, and the linelooking or print-preventing means, 850. Fig. 11 is a bottom plan view of the 1 combined carriage-stop and line-lock contrivance also an end view. Fig. 12 is a plan view of the preferred form of pointer mechanism detached. Fig. 13 is a side elevation of said yo pointer mechanism attached to the carriage shift-rail and in working position, a portion of the platen being shown in sectional lines in its normal position and in dotted lines in its upturned position. Fig. 14: is a view simii7 5 lar to Fig. 13, but showing a modified construction of pointer mechanism. Fig. 15 is a top plan view of another pointer mechanism detached. Fig. 16 is a side elevation of the pointer mechanismshown at Fig. 15 mounted on the top plate and in working connection with the shift-rail; and Fig. 17 is a similar view, but showing a different mode of connecting the pointer. to the shift-rail. Fig.

18 is a perspective view of the carriage-stop plate 0. 1.

In the several views the same parts will be found designated by the same numerals and letters of reference.

1 1 are the side frames of the machine; 2, c; the top plate or type-ring; 3, the type-bar hangers mounted thereon; at, the type-bars, provided each with two types 5 and 6; 7, the lifting-lever, pivoted in the type-bar hanger and connected to the type-bar; 8, the con 5 meeting-rod, attached at its upper end to the lifting-lever 7 and at its lower end to a keyleyer 9, notched at its rear end and pressed upwardly against a transverse fulcrum-rod 10 by means of, a spring 11, and provided at 00 its frontend with a key 12. i In upturned arms 13 from the top plate is secured a guide-rod 14, upon which is mounted to slide a carriage 15, having arms 16, perforated to surround said rod. Said arms have each an inwardly-extending hub 17, which hubs are embraced by forks 18, connected together by a bar 19, which is pivotally attached centrally, as at 20, to the back bar 21 of the platen-carrier,designated as an entirety by 22.

To the front bar 23 of the platen-carrier is riveted a grooved plate 24, which is provided with grooved antifriction-wheels 25, which embrace the upper side of a shift-rail 26, arranged parallel with the guide-rail 14 and mounted at the upper ends of levers 27 and 28, the former being pivoted at 29 to the side frame and the latter at 30.

The lever 27 has a downwardly-extending arm 31, to which is pivoted the upper end of a link 32, the lower end of which is pivoted at 33 to a shift key-lever 34, attached to the fulcrum-rod 10, and having a finger-key 85. Upon the depression of said finger-key the shift-rail, through the vibration of said levers 27 and 28, is moved forwardly or toward the operator, and simultaneously the platen-carrier and its attachments are moved in the same direction therewith, the forks 18 sliding forward on the hubs 17, all in the usual way in the Densmore machine. The parts are returned to their normal positions by means of aspring 36, attached at one end to the link and at the other end to the shifting key-lever.

37 is the cylindrical platen, the shaft, axle, or pivot 38 of which is mounted to rotate in end bars 39 of a platen-frame composed of said end bars, a back rod 40 and a front bar 41, all rigidly connected together. The-shaft,

axle, or pivot is prolonged at each end, and.

passing through slots 42 in end pieces 43 of may be rotated.

engagement by a line-space pawl. shown.)

to facilitate the raising and lowering of the platen.

an end paper-guide 52. sure-roller 53 are mounted to turn in bearings in said hangers, which also support a scale-: bar 54, that is graduated and marked from; left to right to correspond with the scale-bar 55, attached to the grooved plate 24 at the.

front of the platen-carrier, a fixed index 56 being adapted to cooperate with the front scale to in-dicatethe plane of the printing point and the progress and position of the carriage.

For each hanger 51 is provided a coiled tension-spring 57, which surrounds the back rod 40 and is attached at one end to the hanger and at the other end to a collar 58,adjustable on said rod for varying the tension of said spring.

Pivoted or hinged upon the back rod 40 is a spring-pressed paper-table 59.

On the under side of the carriage 15 in rear of the guide-rail 14 is secured a feed-rack 60, with which engage alternately a feeding-dog 61 and a holding dog 62, the latter being made integral with an arm 63, which is pivoted horizontally at 64 in a bracket 65, and the former being made integral with a plate 66, supported by screws 67 and 68 on said arm 63, and slotted longitudinally, as at 69, to enable it to slide lengthwise independently of said arm under the influence of a spring 70, attached to a screw on said arm and bearing at its free end against the back of the sliding member 66.

The dogs are worked up and down by means of a connecting-rod 71, whose upper end is pivoted at 7 2 to the arm 63 and whose lower end is pivoted at 74 to an arm 75, attach'ed centrally to a transverse universal bar 76, pivotally connected by side arms 77 to the fulcrum-rod 10. Each key-lever is provided with an overhanging hook 78, which is adapted to pull down said universal bar and said connec'ting-rod 71 and thereby actuate the dogs in one direction. The said dogs return to their normal positions on releasement of the key-lever through the medium of a coiled spring 7 9, the lower end of which is attached to the said arm 75, and the upper end to an adjustable bracket 80,'attached to the top plate by a screw 81. 7

At the front of the machine and centrally. is arranged the space-key 82, which is attached at its ends to the forward ends of two levers 83, which at their rear ends are fulcrumed on the rod 10, and which are provided each intermediately with a hook 84 for engagement with the universal bar 76, in a manner similar to the key-levers of the machine.

On the under side of the feed-rack is a pin 85, to which is attached one end of a strap 86, the other end of which is attached to the j spring dri ving-drum 8-7.

The front bar 41 of the platen-frame is pro- 1 vided with two short guides 50, and the back i rod 40 of the platen-frame is provided at each end with a pivoted hanger 51, which supports 5 The ends of the presl The rear side of the carriage 15 is grooved longitudinally, as at 88, to receive a small roller 89, projectinginwardly from anarm'QO, attached to the top plate, the said grooved roller operating to prevent any hinge or pivotal motion of the carriage about the guiderail 14.

The parts thus far described are common in the Densmore machine.

I shall now describe more particularly the various improvements made by me, which, however, are not limited to their employment in a Densmore machine, as some of them may and shifting of the paper by hand. gitudinal movement ofv the platen is effected be used equally well in other types or makes of machines. I shall employ. generally letters of reference.

Theplatenis made adjustablelongitudinally independent of its carrier 22,in order that characters may be inserted in a written linewith greater nicety and without the usual pulling This lonby the following means: The left-hand end of the platen shaft oraxle is provided with a screw-thread a, upon which turns .an interiorly-threaded nut 19, provided with a handwheel 0. The right hand end of the platen shaft or axle is provided with a washer or collar d, against which the inner end of a coiled spring 6 bears, the outer end of the spring pressing against the inner end of the knob 45. The power and tension of this spring are such as to move the platen, its frame, and attachments toward the right whenthe nut is screwed rearwardly, and this movement of theparts toward the right under the influence of the spring is limited by a boss f on the right-hand end bar 39, which strikes against the slotted portion of the end bar 43. The platen has a longitudinal motion independently of its carrier 22 a distance about equal to one letter-space, which is sufficient for all purposes. In making corrections, if it be desired to insert a letter in a word the paper is passed around the platen as usual and theline of print brought to the proper position to receive the letter to be inserted; but in thus adjusting the paper the blank spot to receive the letter to be inserted may and usually does not register exactly with the plane of the printing center, and hence the paper is required to be moved slightly widthwise or laterally, which adjustment is usually performed by pulling or tugging upon the sheet, with the consequent liability of tearing the same. By the means shown this lateral or sidewise adjustment of the paper may be quickly and accurately effected by simply screwing the nut forward. and thereby drawing the platen-frame, platen, and the paper all together toward the left. As the inner end of the nut bears against the outer face of the slotted portion of the side bar 43 as the nut is turned upon the screw, the shaft or' axle of the platen and-the connected parts are all thereby drawn or. fed toward the left, and by this means it will be understood that the paper. may be adjusted laterally a thousandth of an inch, more or less, to bring the blank spot to registerabsolutely with the printingpoint. After inserting the letter, the nut is screwed backwardly and the spring is thus permitted to return the platen to its normal position in the carrier.

1 have found in practice that the means for thus adjusting the paper laterally possess the greatest utility when combined with a pointer arranged in the plane of the impressioirpoint and contiguous to the paper when in its upturned position.

In referring to the new parts Any suitable form'or con- .struction of pointer may be employed with said adjusting means. Thepointers herein shown constitute a separate feature of my in.- vention and will now be described.

The construction and arrangement of poin: ter shown at Figs. 12 and13 is the preferred form, and is also shown at Figs. 1, 2, and 3. The pointer per se is designated by the letter g, and is made in the form of an arm, which is fast on a horizontal rock-shaft 71., having bearings in a bracket z',which is provided with two transverse slots j, andwhich is secured adjustably to the under side of the shift-rail 26 by means of two screws k, which pass upwardly through said slots into threaded holes in said rail. The forward end of the bracket is formed orprovided with a fixed indicator 56 to cooperate with the front scalebar 55 of the platen-carrier. The front end of the rock-shaft is provided with a handpiece m, by which the pointer may be conveniently turned from a horizontal inoperative position to a vertical operative one, the movements of said handpiece m, and hence the pointer, being limited by studs n, projecting forwardly from the bracket 1'. Between the pointer and the inner end of the bracket is arranged a coiled spring 0, which is adapted to hold a small conical point p on the handpiece in a recess in the bracket when the pointer g is turned up to working position,

I as indicated at Fig. 13, the rock-shaftbeing adapted to slide endwise slightly in its bearings for this purpose. In practice the pointer is used only for locating the. printingpoint and making corrections,and hence at all other times it may remain. or lie in a horizontal or intermediate position on either side. of the central line of the bracket. VVhenit may be desired to use the pointer,theplaten is turned up to bring the line of print to view, as shown at Fig. 3, and also by the dotted are at Fig. 13, and the pointer g is then by hand turned to a vertical position, and so that its upper extremity will come adjacent to the bottom of said line, as shown at Fig. 3, whereat the pointer indicates the plane of the printing center and also shows that the paper is in correct position for theimpression of the next character. If the right-hand side of the w were in alinement with the pointer, it would indicate that the paper should be moved slightly toward the left to obtain therequired blank space for the next letter, which movement may be readily efected by the nut, as before explained. hen the platen is turned down for resumption of work, the pointer may be left standing upright, as with the form of paper-guide 50 shown. When said guide, in the movement of the carriage, reaches the pointer, it will force the conical projection from itsseat and turn thepointer down to an inoperative position, which of course is notnecessarily a horizontal one. The progress and positionof the paper-carriage are indicated alwaysby the fixed index and scale 55, as usual.

Connecting the pointer to the shift-rail is an essential feature of this part of my invention. As the type-bars have each two types, an upperand a lower case letter, and as a shifting platen is employed in connection therewith, means must be provided to prevent the platen from pressing against the pointer when shifted and to enable the pointer to always hear a relatively fixed position close to the platen when turned up, both when the platen is in its normal lowercase position and when it is in its shifted forward position and all upper-case work is being done. For these reasons I have made the pointer bodily movable back and forth with the platen by connecting the same to the shift-rail, which effects the back-andforth movements of the platen. This feature of moving the pointer by and with the shiftrail is carried out in all of the forms exhibited.

At Fig. let the bracket 1' is dispensed with and the pointer g is made integral with .the

index 56, the piece 56 g being attached by screws to the under side of the shift-rail. As the pointer g in this case stands always in a vertical position, the paper-guide 50 is bent at its upper portion to always escape said pointer during the travel of the carriage.

At Figs. 15 and 16 the pointer 9 which likewise always stands in a vertical position, is fastened to the inner end of a sliding rod q, suitably supported in a bracket 0, which is attached to the top plate 2 by means of screws .9. The rod q is flattened where it passes through its bearings in order to prevent any rotation, and the said rod is provided with a lug t and a spring it, which operates to force said lug against the index 56,

which cooperates with the scale 55, and which their first positions simultaneously with the i shift-rail and platen, thus, as before, maintaining a fixed relationship between the pointer and the platen.

At Fig. 17 the pointer and sliding rod q and fixed index 56 and lug t are employed as before, but in lieu of the spring another lug o is arranged on the inner side of the shiftrail, so that the pointer may be moved positively with the shift-rail in both directions, the lugs t and o operating'as a yoke upon the shift-rail.

In a turn-up or roll-up platen of the class found in the Densmore machine, it is inconvenient to make erasures from the sheet when the line of print is exposed, unless one hand be employed to hold up the platen against the pressure of the hand used for erasing, and to avoid this objection. l have provided means for locking the platen when turned up to expose the print and make corrections. This is accomplished by having the rearmost edge of the hinged paper-table drop into or engage notches w w in the forward ends of the" sliding forks 18, which engagement is automatically effectedwhen the platen is turned up to expose the printing, as shown at Fig. 2, and in this position the pressure on the platen during the act of rubbing or erasing below the center line of the platen is met and resisted by the paper-table and the shoulders formed by the notches w.

When it may be desired to return the platen to its normal shifted position, the platenframe and the platen carrier are lifted slightly and at the same time the platenframe is rotated in the proper direction, said lifting action serving readily to effect a disengagement of the paper table from the notches. The back rod 21 of the platen-carrier having a slight rocking motion about the pivot 20, (the limiting-screws 92-standing out of contact with the under sides of the forward portions of the sliding forks,) the rear side of the platen carrier .may be lifted slightly and enough to enable the paper-table to readily escape from the notches.

It will of course be understood that when the platen is looked as above described a firmer support is afforded for making erasures, and at the same time the operator is free to use both hands for the work.

In order to increase the speed of the machine, I employ means for spacing between Words simultaneously with the impression of the last letter of a word; or, in other words, the machine is organized so as to enable the carriage to feed two letter-spaces when a character-key and the space-key are simultaneously actuated.

independent spring-actuated dog-plate 66 are of a length sufficient to enable the feedingdog 61 to be moved the distance of two notches or spaces on the rack under certain conditions, as when the space-key 82 is fully depressed, but ordinarily, as when the character-keys are struck, the said dog can move the distance of only one notch or space on said rack, and hence during the writing of a word the carriage moves only single letter-spaces. When, however, the space-key is struck, the carriage moves the distance of two letter-spaces. 1f the last letter of a word and the space-key be struck simultaneously, two letter-spaces will occur, one for the last letter of the word and the other for the space between words. The feeding-dog 61 is prevented from moving a double space during the impression of the letters of aword by means of a stop :0, arranged centrally in the path of a pin y, projecting rearwardly from the plate 66, the said stop being formedat the front end of an arm or lever z, pivoted at z, and provided with'a spring .2 having a downward tension.

This is accomplished by the following means: The slots 69 in the:

Referring to'Figs.- 6 and-7, when the;:con-

necting-rod '71 of the escapement mechanism is pulled down during the printing of a letter the feeding-dog is withdrawn fromthe rack, as shown at Fig. 7, the holding-dog engages therewith,and at the same time the feeding dog is driven toward the left (considered from until the pin g strikes against the stop 00.

the finger-key is released the. rigid dog es capes from the rack and thefeeding-dogen- :gages the next notch thereof, at which mo ment the carriage-driving spring operates to pull the rack and the feedin g-dog toward the right until the left-hand ends of the slots 69 strike against the stop-screws -67 and 68. Thus the carriage is fed a single letteraspace distance during each depression of a char: acter-key, which has a downward movement or depression about one-half that of the space,

NVhen the spacekey S2 is depressed to its full extent, (which in the machinegshown is when the forward ends of the levers 83 about strike the table-surface 91,) the dogs are pulled down a greater distance thanwhen the characterkeys are operated and enough far ther to enable the pinly to pass below the plane of the stop an, whereby the arm 66 may be shot or moved by the spring 70 to the full length of the slots 69, as shown at Fig. 8,

- thereby causing the feeding-dog to move the distance of two notcheson the rack. On re notch from the one it formerly occupied, and

- in consequence the carriage will feed a double distance or two notches at this time. When the pin y is returning after releasement of the space-key, it first strikes the under side of the stop and lifts the arm or lever z sufficiently to enable the pin to move to the right during the feed of the carriage when the feeding-dog is in engagement with t e rack,

the spring 2 operatinginstantl y to return the stop to its normal position.

It will be understood, of course, that in the use of the mechanism it is intended that the operator shall actuate the space-key simultaneously with the depression of the last character-key of the word being written, so as to space at the same time for the last letter of a word and for the space after the word, in order that without further spacing the next word may be begun at. once. ceeding a considerable gain in speed may be obtained. As, however, the operator may desire at times to use themachine in the cus tomary manner; that is, to space singly at all times, I have provided a supplemental spacekey at each side of the machine, which when used will effect single spacing only; These supplemental spacekeys are lettered A and are mounted at the ends of levers A, which are fulcrumed on the rod 10.

By thus pro- These and for lockingthe line, the two being connected together and so constructed as that the carriage may be automatically arrested and the line locked at any desired point, and also such that thereafter if desired the contriyance may be moved or adjusted by hand, so as to permitthe insertion or printing of one or more additional characters.

Mounted upon the top of thecarriage 15, at its rear side, is a rack-bar 13, preferably corresponding in number of teeth to the carfriage-feed rack 60; Upon the rack-bar B is a plate 0, provided with horizontal lips 0, C and D'onits under side to form a semitubular contrivance to embrace said rack-bar and slide thereupon Underneath said plate is attached to the downwardly-bent vertical side 0 integral with thelip C, astrip 0 profvided at one end with a tooth O and at the other end with a tooth C", said teeth being adapted to engage notches in the rack-bar B and hold the device firmly at any point to which it may be adjusted. The inner side or edge 0 of the plate is made to diverge or widen at its rear end, and at its extremity is provided with a downwardly-extending lip C to which is attached a leaf-sprin g E, which at its free end bears against the inner plain edge of the rack-bar and causes the teeth 0 C to normally engage with the notches in the toothed bar B. The contrivance is wider at its front end than at its rear end that is to say, the distance on the inside between the vertical walls of the lips O and D is greater than the distance between the vertical walls of O and C and in consequence of the pressure of the spring thevertical wall of the lip D stands normally away from the inner edge of the toothed bar.

In order to move the contrivance along the toothed bar, the front end of the plate is swung rearwa rd ly until the vertical wall of the lip D strikes against the inner edge of the rackbar, at which time the teeth 0 and C have been disengaged from the notches in said bar. WVhile in this position the contrivance may be slid freely back and forth along said bar, a knob or finger-piece F being provided to facilitate the vibration of the contrivance and its longitudinal movement. The vibration or swinging movement of the contrivance at its front or toothed end takes place about the lip-corner C and its wall as a center of motion, which portion of the contrivance bears IIO 'of the plate 0.

or fulcrums on the inner or plain edge of the rack-bar B. When the knob is released, the spring serves to return the plate to its normal position and to effect a reengagement of the teeth 0 C with the notches in the bar.

Attached to the upper side of the plate is an arm or bracket G, which is bent downwardly, as at G, and then inwardly or forwardly, as at G which arm at its vertical portion G is adapted to contact with the fixed arm 90, attached to the top plate, and to thereby arrest the paper-carriage. At the same time the inwardly-extending substantially horizontal portion G of said arm is adapted to pass beneath the feeding-dog, as shown in section at Fig. 5, and thus prevent the spacing mechanism from being actuated. The interpositionof this arm in the path of depression of the spacing-dog prevents the descent of the universal bar, and hence of any of the keylevers in the machine, and as a result the types are incapable of rising to the printingpoint, whereby when the carriage has come to astop at the end of a predetermined line it isimpossible to accidentally print one character over or upon another. If, however, it sh uld be desired to add one or more charac- LL to the line, the plate 0, bearing the intercepting-arm, may be manipulated and moved toward the left, (considered from the back of the machine,) after which the printingmay be resumed until the vertical portion G of the arm again strikes the fixed arm 90.

In order that the combined sliding carriagestop and line-locking contrivance may thereafter return exactly to its former desired position, I employ a gage-piece H,which is made tubular or semitubular to slide upon the bar B and serve as an abutment for the back edge This device H is provided with a tooth H to engage a notch in the bar B,-and with a'fiat spring H which bears upon the inner edge of the bar 13 and causes said tooth to normally engage said notch.

The device'I-I is made flaring or Wider at its front end at the inner side to enable the device to be swung about the point H as a center for the purpose of disengaging the tooth H when it may be desired to adjust the device H to a new position. The adjustments of the contrivance O and device H may be performed with reference to the machinescales and the bar B may be graduated to correspond with said scales. Between the righthand edge of the vertical portion G of the arm and the right-hand end of the plate 0 (considered from the back of the machine) the plate covers or embraces about fifteeen notches on the bar B. Hence if it be desired, for example, to arrest the carriage and lock the line at, say, 35 on the scale, the inner end ofthe device H, against which the righthand end of the device 0 abuts, is slid to register with the twentieth notch on said bar. If after the carriage is arrested and the line locked it be desired to add one or more additional characters, the contrivance C is slid the same.

toward the left and the printing resumed-to the desired extent. Then if it be desired in succeeding lines to again arrest the carriage at 35 the plate 0 is slidback to abut.

against the device H, as before. It will thus be seen that the device H acts particularly as a gage to enable the slide 0 to be readily re-. set to its former predetermined posit-ion, after having been moved to permit the'insertion of additional characters, and without recourse to the scales.

While the device H when combined with the contrivance O is useful, thelatter may of course be employed without the former, and I therefore do not wish to belimited altogether to the use of this combination of parts.

It will also be understood that the contrivance C may be made longer or shorter than shown and described, although I have found in practice that the dimensions given work satisfactorily.

In order to prevent casual detachmentof the contrivance C, the inner edge of the bar B is provided with a notch B, Fig. 1, into which the free end of the spring E jumps when brought into alinement with said notch, thereby stopping the movement of the contrivance C; but if it should be desired to remove said contrivance the spring may, by hand, be disengaged from the notch and the contrivance thus readily slipped off of the bar 13.

Referring to Fig. 9, which shows a modification of the escapementmechanism, a stop as is pivoted at 562 upon a bar 2 rigidly attached by screws to the bracket Y65, and said pivoted stop rests normally against a ledge 02 on said arm, a spring 2 being provided to bear upon the upper edge of said stop. When the dogs are pulled down for a single space, the pin 1 strikes the free end of said stop, but when the dogs are pulled down for a double space the said pin passes below the free end of said stop and shoots slightly beyond "When the dogs are released, the said pin at first operates to slightly lift-said stop but soon parts company with it and returns to its normal position, (shown at Fig. 9,) the spring 2 operating simultaneously to return the stop to its initial position.

Various changes in design and detail construction may be made without departing from the gist of the several features of my invention.

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

1. In a type-writing machine, the combination of a platen capable of independent movement longitudinally, and a screw and nut arranged axially of the platen for effecting such movement.

2. In a type-writing machine, the combination of a platen, a screw and nut arranged axially of the platen for moving the same longitudinally in one dircction, and a spring for returning the platen to its normal position.

3. In a type-writing machine, the combination "of a platen-carrier,a platenframe 1n ounted on said'carrier and containing a platen,

tion ofa platen-carrier, a platen-frame mounted on saidcarrier and containing a platen, a screw and-nut arranged axially of said platen formoving said platen-carrying frame in one direction independently of said carrier, and a spring for moving said platen-carrying fram e intheopposite direction.

5. Ina type'writing machine, the combination'of' a platen-carrier having upright side pieces, a platen-frame,'a platen, a platen-axis mounted. in said platen-frame'and prolonged at one end to extend to one ofsaid platencarrierside pieces, and provided thereat with a screw or threaded portion,and ,a nut w'orking on said screw or threaded portion and againstsaid side piece to effect an independent longitudinal feed for making corrections.

6. In a type-writin g machine, the combination of aplaten-carrier having upright side pieces,- the platen frame, the platen, the platen-axis mounted in said platen-frame and prolonged at both ends to extend to said upright side pieces, one end 0f said axis'hav-j ing a screw and nut formoving the platen endwise in one direction, and the other end' of said axis having a spring. for moving the platen in the opposite direction and ing it to normal position.

7. In a type-writing machine,:the combination of a turn-upplatem,means for moving it endwise independently of its carrier, and a pointer. arranged in the plane of the impression-point and contiguous to the paper on the platen to indicate the required amount of adj ustment of the platen and the paper thereon in making corrections.

8. In a type-writing machine, the combina tion of a turn-up platen, a screw and nutfor moving the same endwise independently of its carrier, and a pointer arranged contiguous to the paper on the platen to facilitate and render exact the endwise adjustments of the platen and the paper for the making of corrections. i

9. In a type-Writing machine, the combina tion of a turn-up platen, a screw and nut for moving it endwise independently of its carrier, a returning spring for said platen, and a pointer arranged in proximity to the paper on the platen.

10. In a type-writing machine,the combination of a platen adapted to be rolled up to expose to view the last line of printing, a pointer arranged to register with said line of printing when exposed and also to indicate the plane of the impression-point, and means for moving the platen and the paper thereon endwise independently of its carrier and relatively to said pointer.

11. In a typewriting machine, the combination of type-bars provided each with a plurestor ,rality of'types, shittingplaten, a shift'rail for moving said platen, and a pointer adapted for use in 'connectionwith the paper on the platen and 1 connected to said shift-rail'to move therewith and with-the platenduring the reciprocations of said members.

1 12. Inatype-writingmachine,thecombination of type-bars having each a plurality of types, a platen, a platen-frame mounted upon a shifting carrier, a shift-rail for the latter, a pointerconnected tosaid shift rail to move therewith and with'the platen and adapted for adjustment in connection with the paper onsaidplaten.

13; In a type-writing machine,the combination of type-bars having a plurality of types,

a platen, a platen-frame mounted on a shifting platen carrierwhich bears atits front side ascale, a shift-rail, a pointer connected to said shift-rail for use in connection with the paper on the platen, and an index also connected to said shift-railfor use in connection with said scale. s 1

14.- In atype-writin g machine,the combination of type-bars having a plurality of types a shiftingplaten, a shift-rail, and a vertical pointer connected thereto and mounted upon a rock-shaft or horizontalaxis.

15. In'atype-Writingmachine,the co1nbination of type-bars having a plurality of types, a shifting platen, a shift-rail, an adjustable pointer'attached to said shift-rail, and a handpiece for moving said pointer into and out of operative position. 16. Inatype-writingmachine,the combination of. type-bars having a plurality of types, a shifting platen, a shift-rail, an adjustable pointer attached to said shift-rail, and means for holding said pointer in its operative position. I

17. In a type-writing machine,the combinationof type-bars having a plurality of types, a. shifting platen, a shift-rail, and an adjustable pointer mounted on arock-shaft movable i endwise and provided with a spring and a handpiec'e, the latter having a projection to engage with a stationary seat to hold .the V pointer in operative relation to thepaper on the platen. I

. 18. In atype-writingmachine,the combination} of the type-bars having a plurality of types, a shifting platen, a shift-rail therefor, a bracket attached to said shift-railand having an index to cooperate with a scale on the platen-carrier, a rock-shaft provided at its inner end with a pointer and adapted to turn in hearings in saidbracket, and a handpiece on said rock-shaft for moving the pointer into or out of operative position. j 19. In a type-writing machine,the combination of the type-bars having a plurality of ICC types, the shifting platen, the shift-rail, the

bracket attached thereto having an index for the platen-carrier scale, the rock-shaft mounted in hearings in said bracket, the pointer at the inner end ofsaid rock-shaft, the hand piece atthe outer end of said rock-shaft,stops.

to limit the turning of said handpieee, the

spring onxsaid rock-shaft, and the holdingindependent movement in the direction of the length of the feed-rack the distance of two notches or spaces on saidfeed-rack, and also a vibratory movement transversely of said feed-rack, a stop for preventing'said' dog frommoving more than a single notch or space whenthe character-keys are actuated, and a space-key-adapted to vibrate said feeding-dog a greater distance outof said feed-rack than when the character-keys are actuated and to thereby cause it to pass by and'wholly avoid the restraint of said stop, whereby the feeding-dog may move the distance of two notches or spaces onsaid feed-rack and the carriage in consequence be fed a like distance.

22. Inatype-writingmachine,the combination of the paper-carriage feed-rack, the escapement'mechanism including a feeding-dog and a holding dog', the latter being'on a pivotal arm, and the former on a sliding plate supported on said arm, said plate beingslot ted longitudinally and being capable of moving longitudinally of the feed-rack the distance of two notches or spaces thereof, a spring'for moving said plate in one direction, a pin on said feeding-dog-plate, a stop to arrest said pin and said feeding-dog when the cliaracter-keys are actuated, and a space-key having a greater depression than the character-keys and adapted to move the pin down below the plane of said stop and to thereby enable the feeding-dog to move its full dis tance or two notches or spaces on the feedrack.

23. In a type-writing machine, the combination of a carriage feed-rack, an escapement mechanism including a feeding-dog and a holding-dog, the latter being made integral with a horizontally-pivoted arm, and the former being made integral with a plate supported by said arm and having elongated slots and a pin, a spring for moving said slotted plate, a pivoted spring-actuated stop to be engaged by said pin and limit the throw of the feeding-dog to one notch or space when the character-keys are actuated, and a spacekey having a greater depression than the character-keys to move said pin below the plane of said stop and to thereby permit the feeding-dog to be moved under the influence of said spring the distance of two notches or spaces on said feed-rack.

24. In a type-writing machine, the combination of the carriage feed-rack, the escapement mechanism including a feeding-dog and a holding-dog, a stop to prevent the feedingdog from moving more than the distance of one notch or space on the feed-rack when the character-keys are actuated, a space-key having a greater depression than the characterkeysto enable the said feeding-dogto avoid said stop and thereby move the distance of two notches or spaces on said feed-rack, and a supplemental space-key coacting with said double space-key to effect therethrough single spacing when desired, and a stop for preventing the supplemental space-key frombeing depressed as far as the double space-key may be.

25; Inatype-writing machine, the combination of the paper-carriage, a rack-bar thereon, the plateO adapted to slide on said bar and carrying one or more teeth to engage the notches on said bar and made wider at the to be freedifrom said'rack-bar by a swinging movement, and a returning-spring for said plate.

26. In a type-Writing machine, the combina- ;;thereon, a plate 0 provided with underlying glips oneof which fulcrums on the plain edge fof said rack-bar and one or more holding- .teeth, a spring, and an arm to engage a fixed device on theframework of the machine;-

27. In atype-writing machine, the combination of a paper-carriage having a feed-rack, an escapement mechanism, a printing mech- .anism, the sliding, toothed spring-pressed plate G fulcrumed' at one corner and carrying an arm as G adapted to move into the path 101:" vibration of the escapement-dogs and to @thereby arrest the same and the printing Emechanism in connection therewith.

28.. Inatype-writingmachine,the combinaition of a paper-carriage having a feed-rack, =the escapement mechanism, the printing mechanism, a rack-bar on said carriage, the :sliding, toothed spring-pressed plate 6 fulcrumed at one corner and having an arm as G to. contact with a fixed device on the framework, and an arm as G to intercept the escapement-dogs simultaneously with the stoppage of the travel of the carriage and to thereby-lock the printing mechanism.

29. In atype-writing machine,the combination of a paper-carriage having a feed-rack, an escapement mechanism, a printing mechanism, a rack-bar on said carriage, the sliding, toothed spring-pressed plate 0 having a carriage-arresting member and a dog-locking member, and an adjustable resettinggage also mounted on said rack-bar.

30. In a type-writing machine,the combination of a paper carriage, a feed rack, an vescapement mechanism, a printing mech anism, an adjustable carriage-arrestingand line-lockin g contrivance mounted on said carriage, and an adjustable resetting-gage for said contrivance.

31. In a type-writin g machine,thc combinatoothed'end to enable the said tooth or teeth tion of: a paper-carriage, a rack-bar mounted tion of a paper-carriage, having a feed-rack, an escapement mechanism, a printing mechanism, a rack-bar on said paper-carriage; a carriage-arresting and line-looking contriv ance comprising the adj nstable, toothed spring-pressed plate fulerumed at one corner on said rack-bar and carrying an arrestingarm and a looking-arm.

32. In a type-Writing maehine,the combina tion With the rack-bar 13 having the notch B, the toothed, swinging and adjustable plate 0 having a leaf-spring adapted to engage said notch.

83. In a type-Writing1naohine,the combination of the rack-bar B, the oarriagestop, and the resetting device H, having a tooth and a spring and adjustable by swinging and sliding movements on said rack-bar.

34:. In a type-writing maohine,the combination of a paper-carriage, an eseapement mechanism, a rack-bar, a springpressed plate 35. In a type writing machine/the oombina tion of a paper-carriage, an eseapement mechanism, a rack-bar, the spring-pressed plate 0 having the lips G, O and D and the holdingtooth, the said plate being adapted to swing about the lip O and the wall of the lip D being adapted to stop or limit the movement.

Signed at Boston, inthe county of Suffolk and State of Massachusetts, this 18th day of September A. D. 1894:.

WALTER. J. BARRON. Witnesses E. G. THORP, FRANCIS B. PATTEN.

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