US672523A - Type-writer. - Google Patents

Description

-'No. 672,523. Patented Apr. 23, I90I.

W;. R. FOX G. J. BARRETT,

TYPEWRlTEB.

(Application ed Oct. 1, 1898.! (No Model.) 5 Sheets-Sheet @im j@ No. 672,523. Patented Apr. 23, |901.

- w. R. Fox & e. J. BARRETT.

'TYPE WRITER.

(Application ed Oct. 1, 1898.)

(no Model.)

' 5 sheets-snm 2.

ffm g@ Lw Patented Apr. 23, |90l.` W. R. FUX-& G. J. BARRETT.

TYPE WRITER.

{Application med oct. 1, 139841 5 Sheets-Sheet 3,

(ND Model.)

Patented Apr. 23, |901. 1w. B. Fox & a. .1. BARRETT'.

TY P E W R I T E R (Applxcation led Oct. 1, 1898.)

5 Sheets-Shut 4.

fue Model.) l

',272 Z022 7?. ax, "g5/elm JJM/gw lo. 672,523. v ,Patentd Apr. 23, mm.v w. s. rox a s. .BARRETT. Y

TYPE WRITER.

(Application med out. 1, 189s.)

(llo Model.) 5 Sheets-Sheet 5.

UNITED .STATES 4l-)ATENT OFFICE.

WILLIAM R. bFox AND GLENN .L BARRETT, or GRAND RAPIDS, MICHIGAN,

AssIeNoRs To'rIII; Fox MACHINE COMPANY, or .SAME PLAoE.-

TYPE-WRITER.

SPEGIFICATI'O forming part of Letter's Patent No. 672,528, dated April 23, 1 901.

Application tiled October 1, 1898.

To aZZ when@ it mmyoonlcern:

Be it known that we, WVILLIAM R. FOX and GLENN J. BARRETT', citizens of the United Statesesidi'ng at Grand Rapids,Kent county,

Michigan, have invented certain new and useful Improvements in Type-lvriters, of which the following is a specication.

Our invention relates to typewriters; and it is designedto improve the general conto struction and operation ofthe same, the inI- provements herein specified .relating chiefiy to the carriage. mechanism.

To this end the invention includes an escagement mechanism adapted to be readily changed from regular to speed adjustment, the mechanism also being constructed so that the carriage will be retained when pushed backat the very mark of. graduation to which it is moved and will not slip back under the zo 'tension of the cerrage-spring the distance of one or two graduations before being arrested.

`It also includes a lock for the printing mechanism operated when the end of a line has been reached and an adjustable device for controlling the same.

It further includes a signaling device to` denote when the Aribbon has been nnwound from the ribbon-spools.

' It also includes the several details of construction, as will be hereinafter described, and particularly pointed out in the clainxsl The invention is illustrated in the accompanying drawings, in which- Figure l is a side elevation of the typewriter with parts in section. Fig. 2 is a. detail plan View of the escapeinent mechanism. Fig. 3 is a sectional View thereof. Fig. Il is a detail View of a part of this mechanism.

- Fig. 5 is a plan view of the carriage. Fig. 6' 4o is a detail end view of the carriage and a portion of the frame with parts in section. Fig.. 7 is a detail view of the platenshift key. Fig. 8 is a View of the inuei' side ot' the front rail ot' the carriage. Fig. 9 is a similar View 45 showing a modification of the bell-ringing mechanism. .Fig l0 is a detail view, partly in section, of the mechanism which allows the platen to be removed bodily. Figs. .l1 and l2 are views of the lel't and right hand 5o ends of the platen, respectively. Fig. 13 is platen.

,of the plate c.

a detail view ot' they link-supports for the Serial No. 692,899. KNO model.)

platen. Fig. 14 is adetail of the front trackrail and the front of the carriage. A Fig. 15 is ,a detail View of 'the means for holding down the hack ofthe carriage. Figs. 16, 17. and 18 55 are views of details. Figs.l 1H and 19a show a Inodilcation of the means for locking the printing mechanism. Fig. 2O is a View of the semaphore mechanisxn, Fig. 2l is a view of one of the ri Dbox1-spools, and Fig. 22 is a View 6o of the lock for holding down the platen. Fig. 23 Vis a view showing the dash-type-bar head carrying the dash-type in its relation to the Eig. 24 is a detail view of the escapenIent-pawl.

The frame ofv the machine has a carriage b slidably mounted thereon,- to the rearof which the escapement mechanism is located, which comprises a doubleface oscillating rack-bar c, mounted upon a. shaft' journnled in studs 7o projecting-frein the top .of said frame and a delent and pawl for engaging the saine carried by the carriage. Our improvement in the escapement mechanism' relates particulerlyto the arrangement of this pawl and de 75 tent, the rackbar being oscillated as described in Patent No. 614,943, previously granted to ns. I

To the face of the rear side d of the carringe-Eraclea flat platee is secured by snit- 8o ahlescrews, which projects beyond said frame and extends across the rack-bar c.'

Through a sleeve l0, screwed into the plate e, a pin 1l passes, which has a flange l2 abutting the underside of the sleeve l0, and a reduced threaded upper portion extends above the' sleeve 10, to which a, horizontal arm g is clnmped by means of a washer and nut 11. 'lhe lower end of the pin is provided withan enlarged head, between which and the flange 9o l2 the detent l is pivoted on said pin, this portion of the pin being arranged slightly eccentric to the part that passes through the sleeve. The arm g carries at its end a vertical-sleeve n, in which aspring-pressed plunger o is held,the lower or pointed end of which is designed to engage either one of the oppositely-ar'anged depressions P Pf in the face When the plunger is seated in the depression P, the dezent is held in roo such a .position that its engaging point is directly opposite the point ofthe pawlr whichis in engagement with the teeth c of the rackbar c. A spring-pressed plunger s, held in a horizontal socket in the rear bar of the'carriage, presses the detent toward the rack-bar until it bears against astop-pin s,depending from the plate e.

The pawl o is mounted upon the eccentric portion of a pin t, depending from the plate e and provided with a reduced threaded stem, which passes through said plate and is surmounted by a nut andwasher to retain the pin in place. The rear portion of the pawl is provided with a slightly-elongated slot', through which tlie pin t passes. From the plate e to the rear of the pivot-pin ta post u depends, against which a spring-plunger o, held in a socket in the pawl 1", bears. This socket extends at an angle to the rack-bar c, andthe pressure of the spring against the plunger tends to force the pawl both forward or in'the direction of the feed of the carriage and into'engagement with the teeth c' of the rack. To secure a ine engagement of the pawl with the teeth Vcvl of the rack-bar, a screw-pin wextends transversely through the former and finds a bearing against a post as, depending. from the plate e. By lthis means the movement of the pawl toward the rackbar may be regulated. vThe pawl while in engagement with the rack-bar is forced by the carriage tension against the resistance of the plunger carried therebyvinto its extreme rearward position, pressing the front wall of its elongated slot against the pivotpin t. On the depression of a key-bar the pawl is freed from the teeth c by'the rackbar rocking toward the detent,v'vl1e`n the plun ger carried by said pawl at once forces the same forwardA until the rear wall of the elongated slot bears against the pivot-pin. By reason of the camI portion on thisfpin or lits eocentricity the amount of movement the` pawl may have' can be varied. On the forward rock of the rack-bar the pawl is adapted to snap forward under the impulse of its plun-l ger only a sufficient distance (about one onehundredth of an inch) to bring the engaging point thereof just past the tooth of the rack from which it is released. The forwardm ovement of the carriage is prevented on the de.

pression of the key-bar by the detent engaging a toothl of the rack c", directly opposite to the one in the rack o' from which the pawl has just been released. Upon the return of the key-bar the rack-bar also returns, but as the pawl has snapped ahead it cannot come back in the same tooth as before. Hence the carriage must move ahead until the pawl strikes the wall of the next tooth. Under ordinary conditions the feed `ot" the carriage does not take place until the return of 'the key-bar; but for very rapid Writing it is nenessary to have the feed of the carriage take place when the key is depressed, and this is,- secured by swinging the arm g around until the plunger 0 is seated in the depression P. As the pin 11 is turned upon the swinging of the arm g, its eccentric portion is brought toward the rear, which draws -the detent rearwardly, so that its pointl will be in the position indicated at y or with its engaging point to the rear of the engaging point of the pawl. With the parts in'sucha position, on the depression of a key-bar the rack-bar will be rocked forwardly out of engagement with the pawl, and as thev engaging point of the detent is in the rearof the tooth of the rack c", directly opposite that of the rack c from which the pawl has just been released, the carriage will spring forward until the wall of said tooth in the rack c" engages said detent. The movement of the carriage brings the engaging point ofthe pawl in a position when the key is released and the rack-bar returns to just engage the next tooth of the rack c', andi the carriage steps forward only the distance permitted by the elongated slot, which, as before stated, is very slight, being only about one one-hundredth of 'an inch. The eccentricity of the pivot of the pa'wl 'r permits the latter to be adjusted to increase or diminish its longitudinal movement.`

The detent l has no movement Whatever under carriage tension in either of the arrangements of escapem'en't mechanism, while the pawl has exactly the same' amount of movement in'both the reverse and ordinary arrangement of escapement mechanism.

The infinitesimal movement of the pavvl rr longitudinally of the rack ismerely -to make doubly sure the proper operation ot' the escapement mechanism, as-this will operate if the pawl has no 'movement parallel with the rack-bar, as it is clear that unlike the ordi-` nary escapement mechanism the feed of the carriage does not depend upon the movement of a pawl member, but upon the relative positions of the engaging points of the pawl and detent. It will be understood that if both the pawl fr and detent l were fixed as to longitudinal movement and that if the engaging point of the pawl was when set for ordinary feed an infinitesimal distance (say one one hundredth of an inch)'in advance ofthe engaging point of the detent the escapement-action would be secured. The cardinal feature of the escapement is that the carriage feeds without carrying either the pawl or detent along with it, and these parts act to arrest the carriage at the end of its step. This being true, to secure a reverse feed it is merely necessary to change the relative arrangement of the engaging points of the pawl and detent. It does not require the provision or means to first lock one member o the engaging pawls, so that when the parte are set for one escapement-action, it will perform the function ofa rigid deten.t,while the other pawi will be free, and then to reverse this arrangement releasingthe member previously locked and locking the previously-.free member to secure the reverse feed, as lhas been done, nor the provision of three pawis, nor the provision of means for giving the rack-bar an IIO .avance irregular movement-fi. e. causing it to move' in different paths to secure dilerent carriagefeeds.

The keybars lare all fulcrurned at their vrear ends upon the edge of the vertical mem.- ber of an angular bracket 2, extending from side toside of the frame a. Beneath the bars and `in advance ol?` their fulcrum-points is a bar' 5, extending from side to side4 of the frame, provided with a plurality of openings, rinto whicharethreaded the vertical sockets 6, each one of which receives the end of one of theV coil-springs. 7, oneV of which is provided forbsupporting each key-bar. By adjusting the sockets in the bar 5 the individual tensions of the springs may be varied, so that a. uniform'touch may be secured.

The platen-carriage b has V-shaped grooves 20x 2OX in its lower face at the front and rear,

While the rear tracky 22' has a V-sha ped groove.-

in its face and the fronttrack 22" has a dat space centrally thereof at 23', Fig. 14, which allows t'he carriage tocenter itself. At 24, Fig. 15, the-carriage has a depression in which the Wheel l()c Works to hold the carriage vagainst vertical displacement. The bell-crank lever 10b, pivoted to the track-frame, supports this wheel, and au adjusting-screw d at the end of the lever serves to vary the pressure of the wheel upon'the carriage, the said adjnsting` 4screw bearing upon the track-frame. Atthe front the carriage is held down by projections f on each side of the pointer, which hooks over the upper edge of the scalef', Fig. 5. y 'lhe platen-carriage is non-shit'tabl'e from front to rear and the platen is adapted Ato have free movement, being supported for this purpose -n'pon link mechanism substantially the same A as that disclosed in ourapplication Serial No. 602,332. In order to limit the front and rear shifting movement of the platen, -we provide adjustable screw-stops 25 and 25', which are supported in lugs 25"*on the carriage. These stops strike against the bushing 26, which surrounds the platen-shaft. In order to allow the platen to be removed readily from its supporting mechanism, wemake the links 26', which connect the platen shaft withl the rocking arms 26"-, detachable from the said Thelinks areheld in engagement' with pins 29' on the said arms by means o .f-

alIllS.

springs 27', surrounding the platen-shaft and arranged between the finger-wheels 27'.' and the bushings 26, which' are adapted to slide on the platen-shaft and are connected with the links 26'. The supporting-link in rear of. theplateu (marked 26) is forked at l its upper end to receive the pin 26bonthe crossbar A of the platen-frame, and the -pin and link are maintained in connection byaspring-v catch31which is pivotally. mounted on the link 26. In order to remove the platen, the links 26', with the bushings 26, are pressed outwardly, so that theforward ends of the links are detached from the pins on therocking arms', and the spring-catches 3l having been previously thro'wnvback to release the the track-rail.

connection between Vthe rear links and the 'platen-frame theplaten is entirely-free to lie-lifted out of the machine. 'In replacing theplaten the pins on the platen-.frame are simplypressed down and the spring-catches yield under pressure to allow the pins to drop 'into the recesses in the upper ends of the rear links, and the forward perforated ends of the links 26 having been aliued with the pins on the rocking arms the said links 26' pendent of the carriage and to be turned and lifted to expose the printing vin a manner similar to that described in the aforesaid application. l

'In order to manipulate the feed-roller y', we provide a' levenx, having a loop 33', embracingxthebar 34X of the platen-frame at one end ofV the, mach-ine and running to the opposite end, whereit is' bent up and terminates in an eye ern bracing the'oth'er end of said crossbar, so that pressure on the arm 33X of this lever will remove 'the feed-roll bodily from the platen. The feed-roil is held'against the platen by'the spring 36 at the right-hand side of the machine, which is a'xed -spring, and

at the left-hand side of the machine by the f spring 37 encircling the cross-bar 34X, and this spring can be adjusted by a collar 38' connected therewith.

The marginal stop' comprises notches 39, cut iuto'the track, and' a sliding plate 40',

movable on the track 22If and fixed in any desired position to cover more or less of the notches by a spring-stop held in the casing 40 and similauto the stop 40X. (Shown in The pawl which ,coacts with this marginal stop-plate -and the' notches is piv- -oted at 40 to the inner side of the front rail of the carriage,and it is under tension of the spring 40"', which presses its point down upon At the opposite end of the track-rail ,22" the -groove22f is formed, in whichA a rack 41. is arranged to slide. The plate 4:2 covers more or less of this rack, lziccordingl to its adjustment, and this 4plate carries asmall trip'43, one end of which is adapted to be struck byfthe pawl 44:01 by ihedepending end of a pawl 44X, arranged in advance' of the pawl 4g-as shown in Fig. 9, on

`the`cawiage,pwhile the vother end of the trip v43 rests on the swinging plate 45, pivoted underneath theLrack-railand supporting the arm 45', carrying the boli-hammer 46. When the trip 43 is struck by the projection M 0f the pawl 44, pivoted to the carriage, Eig.r 8, or by the pawl,44 Fig. ,9, it will depress the swinging plate, elevatethe belgi-hammer, andA upon the .release of the trip'43 the plate,with .thebell-hammer, will drop back and strike rection. This arm is on atransverse shaft'47, yjonrnaled in the track-frame and under-tension of the spring 48, which holds the shaft against movement which might result from the movement ofthe carriage back and forth. The

- rear end of this shaft has a lever 49, which extends upwardly and inwardly,so' that when the rack-bar ismoved and the arm 46 and rockshaft 47 are operated this lever will be brought up between the stud 49' on the rear track-rail and the escapemept-rack C. As in the application referred to, this rack has oscillating movement about the center 51 in order to effeet the escapement-act'ion, and upon raising the lever 49 in front of this rack its oscillation will be prevented and the keys and printing mechanism will be locked against further action.

A modification of the locking mechanism is shown in Figs. 19 and 19", in which an arm 50 is shownas fixed to the shaft 47. This arm has an angular end which extends beneath a pivoted catch 50, pivoted in a-stud projecting from the frame. This catch normally rests to one side of an extension 52X of the arm, which is connected to the link 52" for rocking the rack. 0n the rocking of the shaft 47, as before described, the catch 50 is thrown up beneath the egtension 52X' in such a position as to prevent the down ward movement thereof,and in this manner the keys and printing mechanism are locked.`

The pawl 44 of the carriage operates the Aalarm mechanism heforeitoperates the 'rackbar to lock the machine, and if it is desired to vprint one or more letters in order to finish a word after the signal has been given the operator simply presses on the pawl 44 at its tail end 5l', so that the pawl will he liftedout of action and the machine will not be locked.

The slide or guide-plete 42 may he held rigidly in position, the spring-stud, heretoi'ore mentionedybeing adapted to t in a depression in the scale. When the platen is lifted to expose the printing, it will be supported in this elevated position hy the links and by a pin 32, lig. 13, which bears n on the upper part of the standard or post 32 of the carriage-frame.

ln order to form a stop for the turning move-l ment of the platen when it is elevated, `we provide a pin 6, Figs. 16, 17 and 18,0n the platen- 'frame, working in a cut-away portion of the bushing 26, which surrounds the platen-shaft and which is connected with the link 26'.'

' When the platen is eleveted,-thie pin strikes paper.

crasse -forms the stop and rest for the lplaten and holds it from tipping forward. 'By means of this Stop the platen may he supportedinits elevated position either when the shift-key is depressed or-when it is not. The shift-key comprises a supplemental portion carrying the finger-disk and pivoted to the forward end of the key-lever, Figs. I and 7, a connection running from said lever to the rocking arm 26", as described inv the before-mentioned Patent No. 614,943. The rear e'nd of the snp'-,

plemental piece being forked and limited in its movement by a stop-pin c, the forward end ofthe supplemental piece has a projection o, and byrst depressing the key-lever through the finger-key by a direct downward action on the finger-key the shifting of the platen will be edected, and then by tilting the supplemental piece by a forward movement of the key the projection on the supplemental piece will be pressed under the projecting ledge c'" on the frame and the platen will be held for upper-case printing.

In Fig. 5 the double actingescapement release-arm is shown in dotted lines, which is used in connection with an underscoring-key,

the type-head of which is shown in Fig. 23. Upon the depression of this key the rack-bar c is rocked forwardly in the usual way to free the pawl r therefrom,which will bring the rack c' thereof into engagement with the detent The release-arm which is pivoted to the carriage, bears against a pin 60, projecting from the face of the detent,.and on tilting the front end of this arm away from thearriege the detent is pushed out of engagement with the rack-bar and the carriage is freed, -so that against the paper on the platen, and by manipulating the lever 60' the carriage may loe On the depression of its respecnog EEO

freely reciprocated back and forth tol draw a line longitudinally of the platen. 'it the' platen is rocked into upper-case position when this key (the nnderscoring-key) is operated, the character ai" will be brought egainst the By then turning the platen a vertical line will be drawn; lt will loe understood that the lower dash character' is so arranged that it willprint just below the ordinary line of printing. The arm 60' has its extreme end in 1 engagement with the pawl fr, and by 'tilting i the front end of this arm toward the carriage it will disengage the pawl from the rack, as described in Patent No. 614,943, granted to ns. The detentl has turning movement under tension of the spring-plunger s to permit it rco being pushed ont of its ordinary position when it is desirable to entirely `release the carriage. When the -end of the lever 60 'is pressed toward the carriage-frame, the pawl/r g will be disengaged from the rack-bar, and as the detent is normally out of engagement therewith the carriage may bemoved freely back and forth. However, when a key is depressed the rack is rocked on t of engagement with the pawl and into( engagement with the detent, and in this position it is held 'as long as the key is held depressed.' `VlTith the parts in this position if the end of the lever 60 is moved away from the carriage it will press the det-ent out of engagement with therack, and the rack having been moved ont of the path of the pawl by the depression of a' key and being held in this position as long as the' key is depressed it will be seenthat the carringe is free to be reciprocatedfreely'back and forth. If the' dash-'type key 'is the one depressed, 'thistype willbepressi'ng against the platen 'andwll draw aline as thecarriage is moved.

For holding the platen firm when drawing the carriage back and forth,.as in underscoring or in writing a vertical line, a catch ox,` Figs. 1 and 22g pivoted to the inner 'face of the front rail 22', having a laterally-extending finger-piece, is provided. y This catch is provided with a hookdesignedto engage the handle or arm a', fixed to the -front bar of the platenframe 'and extending horizontally ,therefrom,which is used for raising the platen to inspect the work. i

AFor indicating when the end of the ribbon has been reached on either of the spools a semaphore a2 is provided,which is iixed to the end of a shaft d2, extending between the front and rear bars of the base-frame, at one side thereof. rihe semaphore normally rests parallel with the front bar of the frame, to the rear of the same. At the other side -of the carriage a. shaft similar to the shaft d2 also extendsbetween the front and rear bars of the frame.

Fixed centrally of each of the shafts d'2v and extendingradially therefrom is a double arm e, between the members of which a vertical ,A arm o2 is centrally pivoted. The lower endof these -arms g2 are weighted to throw the upper ends thereof,'which are provided Withsmall flat lateral projections, against the central parts of the ribbon-spools on the ribbons wound thereon.`

The core of each spool is provided with a Alongitudinal kerf c2i in its periphery, and

whenthe ribbon is almost completely nn- .wound from either spool the rear Wall of the kerf in tl at spool will engage the lateral projection of the arm g2, and as the spool so en gagirg the arm continues to turn in the nn' winding movement of the ribbon the arm g2 will be depressed and turn the shaftdz, which if it be the shaft carrying the semaphore will operate the same directly, or if it be the opposite shaft -it will operate the semaphore through an arm m2,' fixed to said shaft and connected by a link n2 to the semaphore. A

ed to engage the end of the ribbon and hold the same to the spool. This central connection of the ribbon to the spool insnresan even pull lthereon.

As shown in Fig. l, the connection between one.

We claimble-facerack-bar, a pawl engaging one face thereof, a detent engaging the opposite face thereof held rigidly inall engagements with means for shifting-the relation of the engagingpoints of said pawl and detent longitudinally of the rack-bar to permit the`ca`rriage to feed substantially one fiill step'on the depression of the key or one full stop after the key is released, substantially' as described.

2. 'In combination, a frame, a carpiag'e, un-

members, a single paw] and detent carried bythe other member enga,f.,'ing said rack to feed the carriage step by step, said escapement members being disengaged by the operation of a key whereby said carriage will feed under said tension While both said dete'nt and said pawl are free of said rack-bar substantially a full step, substantially as described. 3. In combination, a frame, a carriage under tension, a rack-bar having its opposite 'faces toothed carried by said frame, a single pawl engaging one face of the rack-bar and a detent engaging the opposite face thereoljl both being carried by said carriage, said pawl and detent being held in position independently' of each other and means for positioning the escapement members relatively to each other to permit the carriage tofeed while said escapement members are all ont of engagement, `snbstantially as described.

4. In combination, the double-face rack-bar,

' the pawl and dctent adapted to engage therewith, an" eccentric pivot for said detent and means for adj nsting said pivot fixed thereto and means for retaining the sam-e in its adjusted position, substantially as described.

5. In combination the frame', the carriage, the double-face rack-bar supported from' said frame, a plate carried by the carriage extending horizontally across said rack-bar,'a pawl pivoted to said plate, a pin secured to said plate having an eccentric portion, a detent pivoted on the eccentric portion of said pin and an arm arranged above said plate and se'- cured to said pin for. adjnsting'the same, substantially as described.

the double-face rack-bar supported from said/ frame, a plate carried by the carriage extending horizontally across'said rack-bar, a pawl. pivotedto said plate, a pin. secured to said plate having an eccentric portion, a de tent jf pivoted on the eccentric portion of said pin,

pin 02, located centrally of this kerf, is adaptl. In combination, in a type-Writer, a dousaid bar as to longitudinal movement and der tension, a rack-bar carried by one of said 6. In cpmbination, the frame, the carr.iage,.

the type-bars and the key-levers is a direct IIG ' pivot inthein adjusted positions, said means an arm secured to said pin for adjusting the same, and means carried by said arm adapted to engage the plate to hold said arm and pivot in their adjusted positions, substantially as described.

7. In combination, the frame, the carriage,

the' double-face rack-bar supported from said frame, a plate carried by the carriage extending horizontally across said rack-bar, a pawl pivot-ed to said plate, a pin secured to said plate having an' eccentric portion, a detent pivoted on the eccentric portieri of said pin, an arm secured tofsaid pin for adjusting the same, end means carried by said arm adapt-- ed to engage theplate to hold said arm and comprising a spring-plunger carried by said arm adapted to engage recesses' in said plate.

8. In combination, the frame, the carriage, the rack-bar, the' plate extending from the carriage across the same, a' pawl -pivoted to said plate on one side of said rack, a sleeve screwed in said plate pn the opposite side of the rack, a pin extending through said sleeve having a ilange abutting the under side of said sleeve, an eccentric portion below' said -ange and an enlarged head, a datent piyct` eden said eccentric portion of the pin, a reduced portion of the pin extending above said sleeve; an arm rigidly secured thereto, and a spring-plan ger carried thereby adapted to eisgage a recess ,in said plate, substantially as described.

9. ln combination, a frame, a' carriage, a

rack-barcarried by one of said members, a pawl'land a dete'nt carried by the other meinber adapted to` engage said rackhan, said pawl and detent being held in position independently of each other .and maintainingin all adjustments of said parts the same relativemovenient in the direction of the carriagefeed, independent of said feed and means ier4 adjusting the relative arrangement of the engaging points of said pawl and deten-t to givev tent :free of said' racist, substantially as de scribed.

l1. In combination, the frame, the carriage, the rack-bar, the plate carri@ by the carriage extending across said rack-bar, a palwllloosely pivoted to said plate, a spring-plunger carriedby said pawl and. a post-bearing for said plunger depending from saidxplate, substad' tially as described.

l2. lm combination, a frame, a carriage, a platen and platenjframe, means for holding erases the platen-frame to the carriage, saidmeans permitting the platen to be raised or tilted, the arm extending from' the platen-frame, and the catch, independent of the means for securing the platen-frameto the carriage secured to said carriage and adapted to engage l said arm t0 hold said platen from raising or tilting, substantially as described.

13. In combination'tbe frame, the rocking bar having its opposite edges toothed, the carriage carrying a pivoted pawl and detect adapted to engage the opposite sides thereof and a pivoted release-lever adapted to be operated to throw either the pawl or the detent out of engagement with said bar substantially as described.

' 14. In combination, thecarriage,thc platen,

' the track-frame and roller for holding the ear- 'riage down and the lever pivoted to the trackfram'e with means for adjusting the leves. for varying the pressure of the roller on the carriage and the carriage upon the track-frame, substantially as described.

15. ln combination, the carriage having a depressiomthe wheel or roller,` running in said depression, aboli-crank lever carrying the roller and pivoted to the track-frame, and

means for adjusting the lever, substantially as described.

16. ln combination, the platen,the carriage, the link mechanism for supporting the platen, comprising thev link 26 connected with the platen-shaft and vadapted to be shifted longitudinally thereof,`and means for holding said link in normal' position, substantially as de- 17. ln combinatiomthe platen, the carriage, the link mechanism between the platen and carriage, said link mechanism comprising a link infront and a link in rear of the platensbat, both' links being detachable to permit the removal of the'platen said. front linkesing.y held normally in place by spring tension, substantially as described.

i8. In combination, the platen,the carriage, v

and link mechanism connecting the carriage and platen, said link mechanism comprising a link connected with the platen-shaft and adapted to shift-longitudinally thereof te be detached from its connection and the spring about the platen-shaft te hold the link in normal position, substantially as described.

19. ln combination, the platemthe carriage, the link -mechanism supporting the platen upon the carriage and comprising a linlr 26', the rocking arm 26" for shifting the platen frolnupper to lower case, said. arm haring a detachable connection with the linl.` and yielding means foi` holding the link in normal position, substantially as described.v

20.' ln combination, the platen,tbe carriage,

the rocking arm26" for shifting the platen having a laterally-extending pin,4 and a link 26 engaging said pin and adapted to shift 'longitudinally of the platen-shaft to 'be detached from said pin, substantially as described.

IXO

2l. In combination, the platen, the carriage, the link-supporting mechanism comprising the shifting link 26' adapted to shift longitudinally of the platen to be detached from its connectiomthe linger-wheelon the platenshaft and the spring interposed between said wheel and the link, substantially as described.

' 22. In combination, the platen, the feedroller, the erfassbar' of the platen-frame and means for manipulating the feed-'roller comprising the lever having the loop 33 em- 'bracing the cross-bar of the platen-frame,

said lever having an arm extending to the opposite end of the machine and bent. up in the form of an eye and a spring encircling the cross-bar of vthe platen-frame and connected with the lever said spring having a collar by which its tensionmay be regulated, substantially as described.

23. In combination the carriage,the platen, the pawl moving with the platen, the adjustable plate on the front bar of the track-frame, the trip carried by said plate, the swinging platepivoted to the track-frame fixed as to movement longitudinally of said frame and arranged to be operated by the trip, the lbellhammer on the swinging plate and a bellsubstantially as described.

24. In combination, the carriage for the platen, the track-frame, the adjustable plate on the track at the front of the machine, the trip on said plate, the pawl on said carriage to operate the tri p,the swinging plate adapted to be operated by the trip in the different positions thereof, said plate being pivot-ed beneath the track-frame, the bell-hammer on the plate and the stationary bell adapted to be struck thereby, substantially as described.

25. In combination,the platen,the carriage, the track-frame, the lock for the printing mechanism and means for controllingsaid lock comprising a rack-bar, a pawl on the carriage to engage the same, a guard-plate for shielding more or less ofthe rack-baz" from the pawl and connections from the rack-bar to the lock, substantially as described.

26. In com binatiomthe platen,the carriage, escapement mechanism including a swinging rack-bar, and means for locking said rack including a pawl on the carriage, a slidable rack adapted to be engaged by said pawl and connections interposed between the slidable rack and said swinging rack-bar, substantiall y as described.

27. In combi nation,the calria&1 3,the platen, the track-frame, the adjustable plate on the track-frame carrying the signal-dog, connections therefrom to the alarm, the rack-bar, the lock for the printing mechanism, conn'ee tions from said rack-bar to the lock and a pnwl on the carriage for operating the alarnilog and the rack bar, said rack-bar being exposed more or less by the adjustable plate, substantially as described.

28. In com bination, the frame, the carriage,

the printing mechanism, the erscapement mechanism including a swinging` rack-bar, means for checking said bar to prevent the swinging thereof, a pawl carried by said carriage, a slidable rack adapted to be engaged thereby, a rock-shaft-carrying said checking device and an arm carried by said rock-shaft, extending in the .path of said slidable rack,

fsu bstantially as described.

2). In combination the platen ,the carriage the supporting-links for the platen adapted.

to permit the elevation of the same to expose the printing and a fixed supporting-standard 32b on the Vcarriage adapted to be engaged by the pin 32 on the supporting-link, said pin being to one side of the axis of the platen to snpport'the platen in its elevated position, substantially as described. v

30. In combination, The platemthe carriage, the link mechanism adapted to permit the turning of the platen and its elevation to expose the printing and a stop consisting of a pin on the platen-frame and the bushing on the platen-shaft having a cut-away portion form ing shoulders,substantially as described.

3l. In combination,the platen,theearriage, the link mechanism connecting said parts and adapted to permit the elevation and turning of the platen, said platen turning on its axis and a stop for limiting the movement of the platen, the stop being arranged to one side of the axis of the platen, substantially as described.

32. In com bination,th e carriage, the platen,

ball-bearings, the track-frame havinga V- shaped groove at the near and a correspond ing V-shaped giloove on the front bar of the carriage and a lat portion arranged centrally of the front track and cooperating with the bail-bearings held in said grooves, substantially as described.

33. In com bination,the carriage,the platen, the track-frame, the alarm, the lock for the printing'mechanism, the pawl at the front of IIO the carriage for etecting the action 'of the alarm and the lock, an adjustable device at the front of the carriage for controlling the action of the pawl,the said pawl beingaccessible to the operator at thet'ront of the machine whereby it may be thrown out of action after sounding the alarm to prevent the operation of the lock, substantially as described.

34:. In combination, the frame, the rocking bar having its opposite edges toothed, the 'carriage carrying a pivoted pawl adapted to engage oneside of said bar and a pivoted detent adapted te engage the' opposite side thereof,and a release-lever pivoted to the carriage having its end extending in between said pawlfand detent for pushing either of said members out of engagement with said rack-bar, substantially as described.

-35. In combination in a type-writer having an escapement mechanism including the rocking rack-bar, an underscoring or dash type key adapted tooperate said rocking rackfbar,

8 @mp2s a pawl and detent to engage the seme alter Vice being adapted to be thrown out of the nately ,and a, release-bar to act upon either path of the looking lneohanim.

the detent or the pawl,gsubst-antia,11y as de In testimony whereof we aix our signa,- cribed. tures in presence of two witnesses. 5 36. In ooxnbinatou,the carriage, the f mme,

the platembhe escapemem mechanism,'1nean for locking said escapement mechanismagainst operation and a device pivoted to the Witnesses:

front of ,the carriage adapted to engage said GEO. K. MCMULLEN, ya locking means to operate the same, Said de- WILLIAM C. HOERTZ.

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