US911805A

US911805A - Type-writer.

Info

Publication number: US911805A
Application number: US41899008A
Authority: US
Inventors: Noel Pemberton Billing
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-03-03
Filing date: 1908-03-03
Publication date: 1909-02-09
Anticipated expiration: 1926-02-09

Description

N. P. BILLING.

TYPE WRITER.

APPLICATION FILED mum, 190B.

91 1, 05 Patented Feb. 9, 1909.

4 SHEETS-SHEET 1,

N. P. BILLING.

TYPE WRITER.

APPLICATION TILED Mans 1908,

91 1,805. Patented Feb. 9, 1909 4 SHEETS-SHEET 2 N. P. BILLING.

TYPE WRITER.

APPLICATION FILED MAB-.3, 190B.

91 1 ,8Q5 Patented Feb. 9, 1909. A 4 SHEETS-SHEET 3.

my. BILLING. TYPE WRITER.

APPLICATION FILED MAR,8,190S.

91 1,805. Patented Feb. 9, 1909.

4 SHEETS-SHBET OFFICE.

NOEL PEMBERTON BILLING, OF LONDON, ENGLAND.

TYPE-WRITER.

Specification of Letters Patent.

Patented Feb. 9, 1909;

Application filed March 3, 1908. Serial No. 418,990.

To all whom it may concern:

Be it known that I. NOEL Pmmnn'ron Bu.- LING, a subject of the King of England, residing at London, England, have invented certain new and useful Improvements in Type-Writers, of which the following is a specification.

This invention is for improvements in or relating to typewriters, and has for its object to provide a compact and simple form of instrument having, if desired, the full range of the more complicated machines at present on the market.

A typewriter constructed according to this invention is provided with a single key whereby mechanism for selecting the character to be printed and printing such character is operated. The same key may also have operative connection with the spacing mechanism, though this latte'r may be so constructed as to enable it to be operated by means other than the said key if desired.

This invention further consists in the employment with a type disk, that is a disk carrying upon its periphery a series of type characters, of a device whereby the angular position of the disk relatively to its dr vin member can be chan ed. Thus the dis may be provided witi several groups of characters on its periphery, and hy changing the angular position of the disk relatively to its driving member, each of these groups of characters may be brought into printing position as required.

One method of changing the angular position of the disk relatively to its drivnig .has rigidly member consists in connecting the disk to the operating key referred to by means of a rack and pinion, the rack being carried by the key and the pinion engaged with the disk by some convenient form of one-wayclutch. The disk is spring-controlled and secured to it, or to a part connected with it, a stepped cam that cooperates with a spring controlled detent. That portion of the cam which lies between any two steps is made to correspond to one of the groups of characters on the disk and the detent is arranged to come into operation at given angular positions of the disk. that is to prevent backward movement of the cam beyond that step which it has last passed. It follows therefore that when the key is depressed, the disk will be rotated and, so long as it is not turned through such an angle that one of the steps on the cam is brought past the detent, it can return under the action of its spring so that any character lying Within the angle of movement thus ali lowed can he brought opposite the printing point. When, however, the disk been turned through such an angle that one of the steps on the cam is brought past the detent, the detent will prevent rut urn of the disk beyond this step so that the key when released rises without rotating the disk and now any further operation will. be carried on with the group of characters lying within that portion of the disk that corresponds to that section of the cam plate that extends from the step to which the disk has been advanced and the next step on the cam.

To determine the degree of displacement of the operating key. and consequently the angular movcment of the disk for the purpose of bringing any one character opposite the printing point. a stepped plate is employed. so that by entering the key in any one step, the positioning relatively to the printing point of the particular character allotted to that step is insured. This stepped plate may be mounted movably upon its support and connected with a striker whereby the printing may be effected; also the striker mechanism. may cooperate with a spacing device so that the same movement of the plate which effects the printing may effect the s acing.

In addition to the devices described above, this invention includes features described hereinafter in detail with rei'erence to the drawings.

In the accompanying drawings, which illustrate one method of carrying out the invention Figure l is a front clcvation of the typewriter; Fig. 2 is a side elevation of the same; Fig. 3 is a plan in section on the line 3 3 of Fig 2; Fig. l is a plan of the l|asc-plate and the parts mounted thereon, but with the body of the machine removed: Fig. 5 is a side elevation of rlg. l; Fig. 6 is a section on the line (S 6 of Fig. 1; Fig. 7 is a sidc elevation oi a type-disk and certain parts cooperating therewith, viewed from the right of Fig. 3; Fig. 8 is aside elevation of the operating key and parts immediately connected therewith shown in a different position from that occupied by them in Fig. 6; Fig. 9 is a plan of the typedisk and certain parts connected therewith. and Fig. 10 is a side elevation of a modified 1 construction of striker.

Like letters indicate like parts throughout the drawings.

Carried on uprights A. on a haseplate A is a casing B. Pivoted in the side Walls of the casing is a spindle (.l and secured Fast on this spindle is a type-disk (T The spindle also has fast upon it a stepped rain or disk C. This disk has three steps 0 and 3- respectively wherewith a detent C is arranged to cooperate. This detent is (arried on the inner face of one of the side walls of the casing by screws G and is slotted at C to permit endvvise movement; a spring C" always maintains the detent in rontart with the edge of the dish (1.

Free on the spindle {l is a pinion l) and rigidly secured to the pinion ls a ratehet wheel I) having three teeth onltu iin'liraled at D The ratchet wheel D lies (lose to the type-disk C and the latter has pivoted to it a pawl I)" \vhieh hy means of a spring D maintained in engagement with the ratehet.

Pivoted in the side walls of the easing: B at E is a lever E and secured thereto or on the spindle earr vinggg' the lever a raek or toothed arni H adapted. to engage the teeth of the pinion I Thejever ll is mrr trolled by a spring l l" that normally maintains the lever in the raised position so that the rack li lies clear of the pinion i). If, however: the lever F, is depressed, the raek engages the teeth of the pinion and rotates it in the direction of the arrow, Fig: As: hereinafter deserihed, this movement of the inion carries with it the t vpe dish C which atter is controlled by a spring C One end of the s ring is secured to the spindle (1 carrying t e type-disk and the other end is fastened to a stud U on the inner face 0t one of the side walls oi the casting l The detent already referred to has on it a lag that lies in the path of the lever E and when the lever is forr-ihly moved to the limit of its "n pvvard travel tl'or the purpose hereinafter tlCrlt'lIllJfl il) then the detent is moved hark against the action of its spring C and permits the. largest portion of the stepped oain C to pass it.

The forward end of the lever I exten'ds through a slot F in a. plate i This plate is provided with side arms or lngs F each of which isslotted at F to rereive a shrew F serured to the easing ll. The plate has two of these arms on eat-h side so that be tween them they embrace the easing and prevent lateral displarement ot the pl-ate while endwise movement ofthe same relatiwly to the supporting casing permitted by the slots F The plate F is provided with a series of steps or recesses F on one side of the central slot 1+ and on the other side it has a corresponding series of steps F which however are staggered relatively to the steps F", Thfifree end of the lever E is hinged to the main portion ol" the lei er at N so that ,it (an more in a direetion at right angles to the general movement ol' the lever ahont the pivot l lh ltwill llItthe seen that as the lever traverses the slot l" it may he moved to the l'l it. or left to enter any one of the reeesses or F".

ln the hinged portion of the l ver l l an extension I) is earried. Thi xtension is Free to slide endvvise on the lever and has on it a lH V ll whereby the lever may he depressed. it spring ll" mounted nithin the end ol' the lever hears again t an oppo ed projeetion on the sliding pieee F1 and thus normally maintains it against a vstop ll \vla-reh v the anon-await ot this portion in an outward tlireetion away from the easing it is re lril-tetl. The sliding pier-v li extends over that portion of the lever ll \vhirh is adapted to eome into engagement with the trps F F and has arts as a step wherehy the lev r is prevented 'l l'tJli'l renting dirertly into eontaet with the step, hot when this sliding: pieee i pn hed haul: against its spring I it exposes the lever [*1 so that this now lllllliH into dirt-rt eontzn'l with the step.

The lower end of the plate l carries a downwardly extending al'in l tvhose end hears npon a lever G pivoted at (l' to one end of the nprighta A on the ha e ot' the maehinln One end of the lever (l earries a stud G that projerls over the forward end of a sparing lever ll. This lever is pivoted to the base A of the machine at ll and is emitrolled lay :1 spring'll Wherehy the forvvard end of the lever is normally maintained in the raised position. The rear end of the lever fl is pivoted to a hell-crank lever (17, This liner is pivoted at G to on of the upright: A. and that arni not eonnet-ted to the lever (l ien-vies a (51111- piere (l. w

Sitnalecl lt'ntlmei'sely to the levers (l and ll is a strike:- -l. This (onsets ot a llltit'li harried to a hen! spring 3 and situated dii'tvtl) beneath the l t'ptwlleh t). (Iii ne fare of the striker l is a j'n'oieetion J which lies in the path ol the ("am-piece ll.

When the lever tl operated as hereinafter deserihetl the llllhtl'illllt lever (l'- is m lted in the tlllt'l'lltlll oi' tln't'at'ron; hi4. I), and the Forward end t the eantpieve ti is so dispo ed that n hen thus advanted it will engage the upper law of the pin il The rear end of the lever ll is made in the Form of :1 jaw ll and pivoted between the linihs of the iaw is a doe ll. The dog )ivoted at It and is controlled by a owing ll which tends to turn the dog elotdcwise'. The dog howeveiz engages the teeth of a spring-wontrolled l'tlth' K whereby it is nor lit) member of the jawll is also made to take] the machine and the ribbon the. form of a dog ll, which lies vertically below the dog ll when the latter is in the position shown in Fig. 4 and also below the lill'lC K.

The rack-K constitutes part of the paperrarriage and is free to slide baclm'ards and forwards in an endwise direction upon the ba e-plane. A.

The under side ot the rack is shaped to proride a guide K whose edges are beveled to engage rorrespondingly shaped rollers K Th se rollers-are situated on opposite sides of the rack and are free to rotate about pins I K whereby they are secured to the baseplate A. In addition to the teeth which co operate with the dogs H" H the rack has a second series of teeth k. 'lhese teeth engage wheel K which forms part of a barrel K wherein a spring such as is usually employed for driving the platen-carriage of,

a typewriter is mounted. One end of the spring is made fast to the barrel K" and the other end is made fast to a pin or arbor K. This arbor has fast upon it a ratchet wheel K wherewith a spring-controlled pawl K, ivoted to the base-plate A, cooperates. A

ll K is fastened to the arbor K and it will be seen that, by rotating the hell, the

arbor and consequently the ratchet K? canhe rotated, for the purpose of putting any desired amount of tension upon the spring within the barrel K".

On each end of the rack K is an upright L and in the uprights is rotatably mounted a paper feed roller L. The roller is prefer ably covered *with rubber or some yielding material and bears against a rod L This rod is also carried on the brackets L and may be rotatable, if desired, or it may carry upon it. a rotatable sleeve. At. one end of the roller L is a milled head L to afford a grip for the purpose of rotating the roller by hand. The roller also carries a toothed wheel I which cooperates with a springcontrolled detent L so that the operator can feel when he has turned the roller through an angle corresponding to one tooth on the wheel L, will be readily understood.

The paper upon which typing is to be effeeted is fed in between the roller L and the rod If and passes through a horizontal slot A? in the uprights A This slot comlnunicates. with an orifice A wherein the paper fed through the slot can collect.

In Fig. 2 the chain line X indicates the paper and shows the position it takes. It will be seen that the paper passes between the triker J and the lower side of the typedisk C and in order that the character on the type-disk may be printed upon the paper, it is necessary that a ribbon shall pass tween the paper and the disk. The ribbon for this purpose is carried upon double spools M M mounted on opposite sides of passes from one in the uprights spool through the slots wound upon the and above the paper and i spool on the opposite side of the machine. Fiat-Ii spool is carried on a squared spindle M rotatably mounted in a bra ket .\l'"' so ('tllt'tl to the uprights The spindle .\l"' has fast upon it a ratchet wheel .d' which roilperates with a resilient pawl member ill. The member M is pi\oted at M to one of the arms F" on the plate F and its lower end is made to take the l'orni ot' a rlaw M. Fig. l. which lies in the path of the teeth of the ratchet. wheel M. The pawl M can be swung about its pivot M so that its clawshaped end is brought out of aliuenient with the ratchet wheel M As already stated. each spool M is double so that it may carry two ribbons, one being wound upon the part m and the other upon the part m. "Inch spool carries a spring" dctent M that engages notches M M in the squared spindle MR \l'ith the spools in the position shown in Fig. t. the ribbon on the part m. is in the operative position. but it the spools are moved :ilon their spindles so that. the spring detents M engage the end notches M". the ribbon on the parts 7)! will be brought into operative pos tion.

The operation of this machine is as Followsr 'lhe foot of the paper X is first fed in between the roller L and the rod If on the paper-carriage and ththi the sheet is fed through to the orifices A in the uprights A by rotating the roller L The sheet passing through the orifices rolls up upon itself, as indicated in Fig. 2, and when sutticient of the sheet. has been passed through so that the point at which writing is to commence lies over the striker J, the. paper is in position for writing. The paper-carriage is then advanced to the limit of its movement in the direction of the arrow, Fig. 1. The spring in the barrel K has already been set up to the required degree of tension by rotating the hell K and the movement of the papercarriagc to the right rotates the wheel K in such direction that further tension is put upon the spring. The lever E having been released, is in the position shown in Fig. 6 and to print any desired character on the paper it must be depressed and entered in one of the recesses or steps F or F 6 of the plateF.

In Fig. 1 one of the steps F is marked Q U and each step similarly has two characters allotted to it. Supposing now, the lever depressed to the step marked Q. the rack E, which moves with the lever, will engage the teeth of the pinion D and rotate the pinion in the direction of the arrow, Fig. 8. The pinion however carries with it. the ratchet-Wheel D whercwith the pawl D on the type disk C is in engagement. The teeth on the ratchet-wheel and the pawl D Btt 1 v n j msi ta on a t w h t P ar xcfiptatthenaorhcht of I 'on'lv atthat point opposite; the cliaracterto rocked in the direction of the arrow, F ig. 5,

' spring J. The cam-piece G As stated cach step corresponds to law; T characters and ifit T .Ujinfiadhf-Qths he lflfehiritdthffi are so set that when the wheel is rotated in the counterclockwise direction, the. type-disk is carried round with it. The characters on l the type'disk are so disposed that that character corresponding to the particular step in the plate F with which the lever is brought into engagement will lie approximately opposite the striker J when the disk C has been rotated illl'ml ll an angle corresponding to the amount of displacement of the lever for the purpose of engagin it with that particular ste Thus if the ever is depressed to the love of the step Q, the character Q on the disk will lie approximately opposite the striker. The forward end of the lever is now swung about its hin cs E so that it enters the recess or stop, w tereupon farther depression will carry with it the plate F and complete the positioning of the character Q. This plate F is maintained in the raised position by the 5 ring H operating upon the spacing lever This level in turn maintains the forward end of the lever G raised by means of its engagement with the stud G thereon and as the dept-riding arm F on the plate F is in contact with the forward end of the lever G the plate F is also maintained in the raised position. It follows, therefore, that as the plate F is depressed, the lever G is rocked so that the belhcrank lever G1 is this causes the cam-piece G to pass over the in J on the striker J and in so doing it epresscs the striker against the action of its however passes beyond the pin J" so that the striker is mlcased from the lower end of the cam-piece and thin suddenly rises under the action of its spring J. The sudden release of the striker causes it to flv beyond its normal position with the result that it strikes the under side of the paper and forccs thistowards the type-disk C- The ribbon as already described lies between the paper and the typodisk, so that that character which lies opposite the strikerat the moment of its release is printed by meansof the ribbon upon the 1 7 a 1 It will bc 'imdcrstood thatany suitable guide may be provided for the ribbon so fliat' displacement of the step thus allows the levcr to descend lower, although engaging the same step. and this difference of movement is sutfi icnt to bring the next: character on tho typcwlisk into oacratirc position. As the hey E is release the spring E returns the lvvcr I) to its normal position and the rack E returns the pinion D while the spring C which controls the type-disk C causes the latter to follow the movement of the pinion and maintains the pawl D in ongancmcut with the ratchet. wheel D.

he discngagcuwnt of the lever E from the step in the plate F frees the plate and pcrmits the lovers H and G to be returned under the action of the spring K. As the lover (t returns to its normal )osition it re turns the boll-crank lever (3: nt in the rc- {urn movement the lower end of the campiecc {i is advanced against the pin J of tin) sirikcr J and engages the under side of the some so that me striker is only slightly displaced in an upward direction and does not rise suliiciently to eficct any printing.

In addition to the depression of the key E- hringing the character to be printed into printing position and effecting such printlug. it also automatically releam the apercarriagc one tooth for the purpose 0 spac- The spacing is ctfccted as follows: As the plate F descends and its dc nding arm I" dspresccs the forward end 0 the lever G,tho s2 12d G on the lever carries down with it the forward end of the spacin lever B. This iifis the rear end of the Fever so that the spring-connnlled dog H is raised clear of the rat-k 'K whilethe fixed dog H engagts the 201151 from which the spring controlled 0;: has just been withdrawn. Immediately the dog H* is free of the rack, its

soring H" swings it about its pivot H in a c ockwisc direction so that itnow lies opposits the. nest tooth on the rack K.

After the printing has been eflected and zhc levcr 1s relcasedgt-he spring H mtnrns the lever H and the parts connected therewith to their normal positions as a ready stated and the ,dog;H is thus again carried down -below the rack K whil "tho a r n rack J; .is, const ti 1 i by bringing the lever into one or other of step 'ied cam C riagc one or more spaces, as at the end of a word or sentence, this may be effected by bringing the lever into any one recess 19-" F and only partially depressing the plate F, g so that no printing takes place, but. the lever H is rocked sufficiently to first. disengage and I then reengage the spring; controlled pawl l H. In order that this may be more readily f efl'eeted, a notch h is provided in the face of E the lever H so that the operator can feel l when the stud G of the lever G enters the same. This notch is placed in such position that when the stud enters it the lever has been depressed sufiiciently to elfect the spacing but has not been carried down so far as to effect printing.

As has already been indicated, the typedisk C carries on its periphery three distinct sets of characters, such as capitals, lower case type and figures and each of these sets of characters occupies one third of the circumference of the disk and corresponds to the three portions into which the stepped cam C is divided by the steps 1,: (r and 0 The whole movement of the lever E however, only rotates the type-disk suliiciently to bringany one character of one of the groups of characters into operation, unless the lever is carried down below the last step into the notch F at the bottom of the slot F Thus, starting with the parts in the position shown in Fig. (3, any character in the first group, say capitals, may be printed the notches F F, and while so operating the lever disk C is free to revolve backwards and forwards and the detent. in the meantime slides upon the largest portion of the If, however, the lever is carried down intothe notch F the disk C is carried so far round that the stepped cam (7 which moves with it, is brought round to such a position that the step passes the detent (i as shown in Fig. 8. The release of the lever I) now returns the pinion D as before, but the typedisk is prevented from returning by the detent (7 so that the teeth on the ratchet wheel D slide underthe pawl D instead of the latter following the same mund as before. It will thus be seen that when the lever has arrived at the raised position, the angular position of the type-disk has been changed relatively to the driving member, that is the pinion D, and the pawl I) now engages the tooth on the ratchet whel next to that which it formerly engaged. If new the lever E is de ressed it operates the type-disk as before at a different, group of characters, for example the lower case type, is carried backwards and forwdrds over the printing point while the deten't C slides over that portion of the stepped cam which lies between the steps 0 and a.

A second depression of the lever E down to the bottom notch F in the plate, will carry the type-disk round to its third position so that the step 0- passes the detent and figures can be written, while the detent slides on that. part of the stepped member which lies between the parts 0 and 0 To return the type-disk to its first position it is only necessary to press the lever E upwards so that the detent C is moved against the action of its spring C and lifted clear of the stepped .cam O when the spring C will immediately rotate the disk back to its normal position. If the lever is not lifted to the full limit of its upward movement, the detent C may be displaced a sutiicient distance only to allow the return of the disk .until the step c engages the detent so that lower case type are again in operation, instead of returning to capitals, should this be desired.

The degree of lift is determined by the sliding stop E whose upper face normally engages the upper end of the slot F in the plate F when the lever E is lifted. In a 1 case the lever E can onl be lifted a s .1 cient distance to return tlie type-disk to he middle position by lifting the detent C over the step 0 but if it is desired to return to the first position the key E is pushed towards the casing B whereby the upper face of the stop E is carried clear of the plate F and thus the additional degree of lift required to carry the detent C over the step c is permitted.

To limit the return movement of the disk C a pin N is mounted on the disk. and the inner face of one Wall of the casing B is recessed at N (Fig. 7) to admit this pin without interfering with the free movement of the disk. Sunkin a recess in the same wall of the casing isa movable stop N pivoted at'N and the recess wherein this stop is received is of such width as to allow the stop to move from one side to the other a sufficient distance to permit a complete rotation of the disk C.

It will thus be seen that when the type disk is allowed to return to its first position the pin N is brought against one side of the stop N and capries the same over to the limit of its movement in one direction whereas when typing is being effected with -at 1, 2 and 3, andthe end of the pointer is brought opposite one or other of these indications according to the group of characters in o eration. The movement of thepointer is e acted by the detent C which carries a in O. This in projects through a slot O" in the wall oft 1e casing and is enga ed with the free end of the pointer 0. It I lllS fol lows that as the detent drops over one or other of the steps on the ste ped cam C the ointer will be correspon ingly moved.

A though, as has been stated, spacing as well as printing may be ellected by the key E", spac may be separately effected, 1f desired, by t e operator lacing lllS finger d1- rcct n on the forwar end of the lever H instea of depressing this through the medinm of the key E and the plate F; moreover the lever mar bedepressed by this means a suflicient distance to lift thejixed dog H above the rack E so that the papercarriage can be withdrawn from the machine.

Any convenient form of stops ma be employed with the paper-carriage for the purpose of ml'llilfllhllg the mar mal posltlon, etc, and any suita le device or 0 the bell K may also be connected with t e same but as these details constitnteno part of the present invention, it is unnecessary to describe them in this s ilication.

The operation of t e ribbon mechanism 15 as follows: One of the arms M as placed in position to align with its ratchet M but the other arm is swam on its pivot so that it does not a]- wit the same. As the plate F desccn s, the arms descend with it,

and the free end of that arm whichaligns "with its ratchet will slide over one tooth of the ratchet so that the claw 1F will lie below the tooth next to that which it formerly ens own double for are urpose f n? two ribbons as descri but obvionsly'sing e bobbins may becniployed if desired.

M isprovidedonj each An embossed st-n M nna M-J p ovided the: 'face of the ca but-isffree. to move in 'ng Bitoreoeiveztheg m slide therein is a member I retained in place by any convenient means, as for instance by enlar ing the ends P. The socket carries a pin which corresponds to the pin J on thestriker J and is intended to engage the campiece G With this form of striker the camniece as it is advanced will engage the pin 1 and depress the lever P against the action of the spring P As soon as the cam- )iece has )asscd over the in, the lever will 0 suddenly released and its sprin P will bring it forcibly a ainst the stop This stop is so arranged that when the parts are at rest the striker lies clear of the paper, but when the lever is brol ht forcibly against it the movable member in the socket P flies upward and strikes the under side of the paper so that printing is effected. After print ing, the member P drops back by gravity to its normal position clear of the paper as will be easily understood.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a typewriter the combination of, a rotatable type-disk, an im ression device eooperating with the disk, ricing mechanism that is operative in one direchon to rotate the disk through an angle of les than 360 but is free to move in the other direction independently of the disk, :1 control device that always tends to return the dish, a stop that is ino tivc while the disk is reci rocated within given limits but is op to a part movable with the disln means for an tomatically advancin the stop when the d'ml: is advanced by the mechanism beyond thislimit-qi 1 1 the against return while the driving mechanism is re turned to its position of Ie5t1t0 ,.establish new limits of reciprocation for the means for releasing thi stop, means for arreal-lug line disk at any pului, of its travel, and means for the driving mechanism from the wen the-stop is released, for the purpose vset forth.

In a typewriter the combination of, a

rotatable type-disk an re sion device ooo rating with the disk, i mechanism t at is operative in onedirectlon to rotate the disk through an a% :e of less thanaflil" .7 a t f t r'di ec ie dependently of I the type disk, a control 'derice that always tends to-t-nrnthe disk in tlie reverse-"sense. to t-bat -of operative i atonement 9ff' t h8 driving linechanism, a m be newbie. t the disk:

mso eeeangwa point of its travel, and means lor releasing the drivlng u'icchanlsm from the disk while the stop is inoperative, for the purpose set forth.

3. In a typewriter the combination ot. a

the angular displacement of the disk by its drivingmcchanism, a yieldingly controlled sto that bears against and advances behind one ,step as these pass it the.steps being guided in such order that as each passes the stopi in advancing still covers the return pat of those that previously passed it, means for moving the stop away from the stepped member, means for controlling the degree of this movement in order that any one step may be engaged by it as the member returns, means for arresting the disk at; any point of its travel, and means for releasing the driving mechanism from the disk while the stop is inoperative, for the purpose set forth. v

4. In a typewriter the combination of,,a rotatable type-disk whose working face is divided into groups of characters, an impression device C0(1 .&It\tlng with the disk,

driving mechanism that is operative in one' direction to rotate the disk through an angle of less than 360 but is free to move in the other direction independently of the typedisk, :1 control device that always tends to turn the disk in the reverse sense to that of the operative movement of the driving mechanism. a second disk mounted concentrically with the typealisk and having its periphery divided into stepped sections that occupy angular positions corresponding to the groups of characters on the type-disk one step being allotted to each group, the steps being moreover graded so that each successive step is nearer to the center than that which preceded it. a yieldingly controlled stop that bears ag: 'nst the periphery of this member, means for releasing this stop, means for arresting the typedisk at any point of its travel, and means for releasing the driving mechanism from the disk while the stop is inoperative, for the purpose set forth.

5. in a typewriter the combination ot, a. rotatable type-disk whose working face is divided 'into groups of characters, an impression device cooperating with the typedisk, a pinion that is operative in one direction to rotate the disk but moves freely in to rotate "type-disk the other direction, a lever, a rack opcratively connected with the lever and in engagement with the pinion, a control device that always t nds to return the disk, means for arresting the type-disk at any point of its travel, a stepped member movable with the disk the distance between the steps corresponding to the groups of characters, a yieldingly controlled stop that bears against and advances iitllllltl each step as these pass it and that has a part that is engaged to release it, by some part movable with the rack, when the rack is moved so far as to carry its eeth out from engagement with the pinion, and means for limiting the return movement of the thus released from its driving mechanism, substantially as set forth.

(3. In a typewriterthc combination oi, a rotatable type-disk whose working face is divided into groups of clniractcrs an impression device cooperating with the typedisk, driving mechanism that is operative in one direction to rotate the disk but moves freely in the other direction, a control device that always tends to return the disk, means for arresting the type-disk at any oint of its travel, a stepped member mova 1e with the disk the distance between the steps corresponding to that occupied by the respective groups of characters on the disk, :1 yieldingly controlled stop that bears against and advancesbehind each step as these pass it the steps being graded so that as each passes, the stopfl in advancing, still covers the return path of those that previously passed it, a lever for operating the driving mechanism, the yieldingly cont-rolled stop having a part that is engaged to release it. by some part movable with the lever, when the Lever is moved beyond a given limit, a check opposed to the lever to limit its move ment one of these members having steps thereon, a movable portion on the lever to render one or other of the stepped portions operative according to selection the steps :11 lowing such difference in the limiting movement of the lever as will displace the stop a distance suflicientto permit the return of the stepped member that moves with the type d isk one or more steps according to selection, and means for releasing the driving mechar-r ism from the disk while the stop is thus displaced, for the purpose set forth.

7. In a 'tniewriter the combination of, a; rotatable typedisk whose working face is divided into groups of characters. an inn pression device cooperating with the type disk, driving mechanism that is operative in one direction to rotate the disk but'moves freely in thc other direction, a control device that always tends to return the disk, means for arresting the type-disk at any point of its travel, a stepped member movable Withthe disk the distance between the steps corresponding to that occupied by the respective spring contro led lever for opt-rating the driving mechanism, i

the viekling v controlled stop having that is engagcd to release a part. it, by some part movable with the lever, when the lever is moved beyond a given limit, a check opposed to the lever to limit its movement in this (lircction one of these members having steps thereon, a movableportion on the lever to render one or OWEI'HHJE according to selection the steps allowing such (Inference in the lumtmg movement of the lever as will displace. the h stop a distance snflicient to permit the return of the stepped member that moves with the type-disk one or more steps according to selection. means for releasing the driving mechanism from the disk while the stop i. thus dilaced. a casing inclming the typedi lr wit its stepped member and the yield ingly controlled stop, and an indicator open atively connected with the stop and extending through the casing, substantially as set forth.

8. In a typewriter the combination of, a

other of the stepped portions 5 rotatable typo-disk whose working face is;

" tension on the lever movable m a lateral divided into groups of characters, an imression defice cooperating with the disk, riving mechanism for imparting such an gular increment to the o brought to the impression producing dis '5 as will permit any part of :1 selected group of characters on the lever movable in a lateral direction 1th of movement of the to engngethenstops, a impression device 0 posed to the ripe-disk and held norma r free of the same. but having a part yieldingly controlled thatmay advancebyond relatively to the lever and ado t 1 mechanism whereby 1 position, a lever for stops disposed in a line the normal position and strike the type-disk, a pivoted member having operative connection with the stop-carrying member and having a cam for engaging the spring-com trolled impression device whereby the said device is drawn back against its spring as tho .s'ItQrl'tH'IylHg member is displaced the cam hou'mcr being of such length that; it pa-sas lmyond the impression device and releases the same before the stop-carrying member arrives at the limit of its movement, for the purpose set forth.

5. In a typewriter the combination of, a rotatable type-disk whose working face is divided into groups of characters, on impre=sion device coiipemtiug with the disk, dri ing mechanism for im arting such angular movement to the dis as will permit any part of a selected group of characters to be brought to the impression producing position, a device for changing the angular position of the disk relatively to its during one or other of the groups can be brought into the operative operating the drivin her cart-yin a series 0 iarall to the path of the lever the member being movable relatively to the t5 e-disk by pressure applied to the stops in t 1e direction of movement of the lever for selecting the character, an exmechanism, a mom direction relatively to the path of movement of the lever and adapted to engage the stops, operative commotion e stop in member and th e impresion device wllereby the latter is advanced towards the 3 pe-disk, a pa 1' carriage movable endwise and L'uDlt'UllLd y yielding means to move in Olll': direction, a longitudinally disposed toothed rack thereo a r cking member ear- I-ying releasing dogs: that. cooperate with the rack to release this step by step, and means operativcly connecting the movable stop-carrying member with this IOklng member, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

XOEL 'PEMBERTOX BILLING. 1 'itness'es: I

I HABRY'B. Eamon, G. G. Tamoxnm.