US477224A

US477224A - pratt

Info

Publication number: US477224A
Authority: US
Publication date: 1892-06-21
Anticipated expiration: 1909-06-21

Description

(No Model.) 8 Sheets8heet 1.

J. PRATT.

TYPE WRITING MACHINE.

No. 477,224. Patented June 21', 1892.

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3 Sheets-$heet 2.

(No Model.)

J. PRATT. TYPE WRITING MACHINE. No. 477,224. Patented June 21,1892.

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No. 477,224. Patented June 21, 1892.

UNITED. STA ES PATENT OF CE;

JOHN PRATT, or. GADSDEN, ALABAMA, Assrenon To run HAMMOND TYPE WRITER COMPANY, or NEW YORK, N. Y.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 477,224, dated June 21, 1892.

Application filed JuneB, 1885. Serial No. 167.486. (No model.) 7

To all whom it may concern:

Be it known that I, JoHN PRATT, a citizen of the United States, residing at Gadsden, in

the county of Etowahand State of Alabama, have invented a new and useful Improvement in 'lypeW-riting Machines, of which the following is a specification.

My invention relates to improvements in the typerwriting machinedescrlbed in myap plication for Letters Patent filed July 7, 18 83,

. Serial No. 100,200.

. The objects of my'in'vcution are, first, to

" construct a machine in which any key can be operated without releasing the key or keys Previously depi'essed in order that all the eys of "thckcyboard may be operated with a slur movement as distinguished from astac- 1 cato movement, thus permitting the attainment of greater speed in the manipulation of' the keys with aless expenditure of power; second, to construct atype-wheel having each type in the rows thereof so placed as to prevent any blurring from a type or types in a contiguous row or rows, and to so pivot such type-wheel to a rotating shaft as to allow it a universal movement; third, to provide an 4 improved variable-spacing mechanism, and,

fourth, to improve the machine in its details of construction. I I

In theaccompanying drawings, which form a part of this specification, Figure 1 represents an end elovationof .a type-writing ma chine embodying my invention. Fig. 2 is a vertical longitudinal cross-section on a line in real-0E the type-wheel. Fig. 3-is aplan view, the paper-carriage, type-wheel, and a few other parts being removed". Fig. 4 illustrates the operation of the mechanism which permits the'depression of a ,key before re leasing another. Fig. 5 is a sectional view of the typ'e'whcel and the shifti'ng'incchanism connected therewith. Fig. 6 is a plan; view of the same. Figs. 7 ands represent a modifi- V cation of the type-wheel-pivotin'g, mechanism;

Fig.0 illustrates a modification concerning the connection of thcdiscngaging lever with the hammer-lever. .Fig. 10 is a plan View of v the type-wheel and hammer, showing the position of the type rela'iively to the hammer-face at the instant the impression is takon. Fig.

A 11 is a diagram referring to the operation of the variable-spacing mechanism. Figs. 12,

13, and 15 refer to modifications of myinven tion, and Fig. 14 illustrates the preferred form for carrying out the first part of my in vention.- V 4 Referring to the drawings, A indicates the base of the machine, and B the standardfor.

supporting apart of the mechanism for driv-' ing the type-wheel and moving the paper-carriage. The shaft 0 of the carriage-operating mechanism is formed with two enlarged openf ings 1 and 2, through which the type-wheel shaft D and hammer-shank E respectively. pass, said openings being suflioientlylargc to permit said shaft 0 to turn in its bearings to V the extent required. With this exception the mechanisms-for rotating the type-wheel and ,i m pellin g the paper carriagc are precise] y the same as those shown and described in my ap-' plication hereinbefore mentioned, audit will.

be sufficient, therefore, to make a general ref- 8 on the inner ends of the two transverse check-

pin shafts

9 and 10. Said shafts are each provided with a spirally-arranged rowof pins or steps 11, operating in connection with fingenstops or projections on the keyl'evers to arrest the typo-wheel, so as to bring each character thereon into alignment withv the impression-h'ammer;

The key-levers .12, provided with fingerkeys'26, are fulcrumed at 13 and 14, as illustraded, and rest back of their fulcrums on cross-bar 24. To the side-of each key-lever a hopper or jack l5 is-pivotcd by-mcans of a screw 16, passing through an aperture in the same into the side of the key-lover, a spring friction-washer 17- being placed between the '0 head of the screw and the side of said jack to retain the saine'in the different positions to .jack also carriesa stop 20,

- which itis'rnoVedQf "hlacl jack is" rovided kwlthan adj nsting-arnrlsgvhieh projects over, fits-key-lever and rests oh a'n-"adj ustablpgstop? lil passing upward thfimgh said lever. -;E-ach 21 of which is adjnstably secnredto. said stop bya, screw 22,'passing through a slot 23in said finger. Saidstop' is' fnrther; providede .T with a .foot 25, which; when the key lever is real: rest, presses or-rests on the cross-bar 24, Instead of cpnsideringthe jackv as carrying said -stop'mhit will be as correct to consider the latteras pivoted orhinged to the key-levet and carrying said jack, especially sinceig tlieuse of tho' spring-washer hasrelation .to p waid'stop, as will hereinafter appear.

. The rockheft 28 is jcurnaled. n the side standards 27,. a The impression-hammerssupporting frame29 is,-rigidly secured to said no sl at'tmndto said framethehammer arm. or shank E is fixed orfornied integral therewith.

,'lhe'hamrner-impelling' spring 31, secured to a support "32 andrendered-adjustable by! screw 33, presses n pwardl y against the under 25 side of said-frame. A second oscillating frame- 34, alsorigidly secured to rook-shaft 28, straddies hammer-frame 29, and is arranged so that.

its transyerse bar 'is er-nae with'and a. stifficient (listan'ee abqve 'the "upper; ends of the 3 jacks to porinitthelatter; to return to theiinorm position. A cantrnlLst'op 35 may be to, k 4

ia 37; ted V arock-snhaft O lt side o: the qadillai-t g z me 3-1,'and of a. locklngjpawli-ls, adjnstably eonnectcd hymeans of screw 39 and slot 40 to one of the said arms 37. flheshidiolkihg-patvl 00 operates w th the toothed-.-'wheel 41- on ch eck pin shaft 10 to prevent rotation of the type: wheel. The d sengaging-bar carries a seriesof adjustable dise "aging project-ions 42,one, ,for 5 5 each key-level, said projections operating in connection with the-jFt'ops 20, as will halter-e inafter described. he said disengaging projections may be applied to the stops-2U, instead of to said disengaging-frame, the latter M striking the upper ends of said projections The arms 37 of the locking :and disengaging framearearran ged .toextond between stops 43, and 4 4;on thehammer-lever, by which stops moyeinont is imparted to'said locking 65' ahd ilisengaging frame or lever and between ,Whi-eh-the same-has a'limited movement i-n-. dependent of said-hammer-lever. As the eeperativefinger said locking and releasing pawl 38 and the disengaging projections reeeive motion through 'the'operation ofthe hammer-lever, itmay be said thatthese parts are connected with the l1ax-n'mer-:lever'i.- e5, indirectly connectedwheel tl of the check-pin slinft. 'Thef're-- ofits motiomso that the jack escapes from the hammer-lever, (said jaizk being slightly tllted thereby, but not to anextent; suflieient ,211,) and the ha .mmerspnngbeing now unrestx atxnod acts to 1111 961 the hammer 3O ox-wan! m ke. gho im pressionn 3 this V V -Sal.

nto engagement with the toothed wheel and'a't the same tiniethat; saidpawl commences to ,ong e and wheel the (1180"- gagingprojection4 strikesstop 20 and forces check-pin shaft This action causes the stop excepting'the jack and stop and the k'eyev'er locking-wheel and the stop our of engageother key-levers may now'be depressed before thispreviously-operated hey-lever is released. Asthe :jack and stop ofeach key-lever are thus shifted to their inoperative positions it the locking/anddisengaging frame 'or lever intervening. o, --'lhe operation of the mechanism sofarde scribed is as follows:-Upon the depression'ef a. key'the rear end otits lover rises, causing the'j'ack thereonjto tilt'the roeking'hammerlever, depressing the hammer impellingf- -spring 31 and causingthe stop 20 to project into the-fieldof movement of the pin on the check-pin shaft, apd irnmodiately following thiseausing the locking and releasing pawl 1 to be lifted'out ofengagement with the toothed istraint on the type-wheel-ilnpelling spring removedbythe disengagement ot'said pawl, the type: wheel shaft and the transverse w check-pin shafts arerotated'thereby until the proper pin on one of the latter-located to bring the typerepresented by the key opposite the impressiomhammer-strikes the stop Y 20 of the depressed key-lever. rAtabont this time the said key-lever has reached'the limit he instanztho im- 7 returns to it out/of. engagement with the pin of the "attached to the jack to assume the inoperative position illustrated in Fig. 4, all of the arts,"

thereof; occupying the same position as in Fig. 1, the locking-pawl engaging the toothed r as meat with .the cheek-pin shaft.- -There is, therefore, nothing to interfere with the proper j 4 working of the machine, and any one-of the is evident thatany number of keys may bev lever is released, it returns by gravityto norkept in the depressed positiou'without inter fering with the manipulation of those in their normal position. When the depressed keymal position, and on its return movement the 'foot 25 of the stop, which has been caused to thelocking-pawl 38 is directlyattached to the hammer-lever 34 instead of indirectly, as in Fig. l, and the disengaging-lever is omitted. The stop is arranged to slide in a vertical groove in an adjustable plate 91, secured, as shown, to the side of the'key-lever 12, a spring 92 pressing on said stop to hold it inany position to which it may be moved. The said stop in its normal position rests on crossbar 24, and

is provided near its upper 'end with a disengaging projection 42, acted upon by the disengaging-lever 36',fixedto the jack 15, which latter is 'loosely pivoted at 16 to the key-lever 12. Instead of fixing said projection to the stop, it may be fix'ed to the lever so as to act on the stop. The arm 18 of the jack rests on screw 19, as in Fig. 1. jack, with its;disengaging-lever, performs the same function as the disengaging-lever carried by the hammer-lever in Fig. 1.. Ins'tead'of considering the said lever as fixed to the jack, it may be con'sideredas pivoted to the key-lever and as having the jack fixed thereto. The operationof this mechanism is as follows: Upon the depression of a key the stop 20 rises into ,the field of movement of stop-pin 11 or check-pin shaft 10 and the jack removes the pawl from the toothed wheel 41, sothat the saidshaft is free to rotate until arrested by the operative finger 21 of the stop 20. -When, following this', the jack slips off from the hammerslever, the hammer is operated and the locking-pawl engages toothed wheel 41', while the stop 20 is still in engageinent with its check-pin. Since, however, the jack is loosely pivoted, its motion is not imvnediately arrested, and it continues to move after the locking-pawl has come to rest until its disengaging-lever 36, acting on the projection 42 of the stop, has forced the'lat'ter out of engagement with the check-pin 11. Having moved the stop to itsinoperative position, the jack and said stop remain in their inoperative positions until the key-lever is released, when they are returned to normal position, the former by gravity and the latter by cros bar 21.

In the modification illustrated in Fig. 13 the jack 15 is mounted on top of key-lever 12 .in athin metal bearing 96 and so as to fit closely between the sides thereof to secure 'the requisite friction. The linger 21 of stop 20 is adjust-ably secured thereto and is provided with two lips 97 to prevent lateral movement. The foot-25 for returning the This loosely-pivoted to its normalposition.

stop and jack to normal position is in the form of a screw, so as to be adjustable, and passes through an aperture in the key-lever,

as illustrated. By this screw the jack can be accurately restored to its normal position. The operation of this construction is identical with that illustrated in Fig. 1.

In the preferred construction illustrated in Fig. 14 the stop 20 isdisconnected from the jack 15 and the latter is loosely pivoted at 1'6,'returning to its normal position bythe force ofgravity. Said jack could, however, be provided with a friction-washer and a re turning projection to rest on cross-bar 24; but it is preferred to rely ongravity to effect the return of said jack to normal position. The stop 20 is pivoted or hinged to a lug 98, projecting from the upper surface of the key-lever 12, and is provided with the foot 25, passing through an aperture 99 in said lever. The said foot closely fits said aperture, the latter b 'lng preferably lined with felt or 01 her mate-"ial, which will exercise friction and act to hold the foot, and therefore the stop, in any position to which it maybe moved. ,Thcfinger 21 of the stop is adj ustably secured to the I top thereof by a slot and screw 22., The foot 25 in its normal position rests on cross-bar 24. When the key-lever is depressed, the stop .is projected into the field of movement of the check-pin 11, and the jack, acting on rock-frame 34, operates the'hammer, the pawl, and the disengaging projection, as in Fig. 1. \Vhen the jack slips off from the hammer-1eve r, the hammeris operated to make the imf pression, and an instant later the disengaging projection 42 strikes stop 20 and depresses it to its inoperative position, where it remains uhtilits key-lever is released, and the erossbar 24, acting on foot 25, can elevate the stop The jack also returns by gravity to its normal position 'Inthe modification illustrated in Fig. 15 the

parts

10, 11, 12, 15, 10, 18, 1o, 21, 22, 24, 34, and 36 are the-same as in Fig.114. The stop 20, loosely pivoted, is held up by the engagement of spring-click 104 with the notch in theend of said stop. The said click is secured in a slot of the key-lever, and is limited in its forward movement by the front' wall of said slot. This click and notch serve the same purpose as the friction clevices'hereinbefore described. The upper part 42 of the adjustable pin held by the stop of the key-lever acts as the disengaging projection, while the lower part 25 thereof acts as a foot to return the stop to normal position.

In this construction when the bar 36 strikes projection 42 it entirely disengages the stop 20 from theclick 104, so that said stopcan drop down by gravity on the key-lever, thus disengaging'finger2l from the check-pin 11. The stop 20 isreturned to normal position by foot 25 and bar 2l.and the jack by the force of gravity upon the release of the key-lever.

, In the modification illustrated in Fig. 0 the disengaging-bar 36 is pivoted to the front part t e givog' and sai d5 ma lly against the upper stop 43' Theloqking- 5. pawl 38 and the vdisengaging projeotipn 4 2, (not shown) are arranged, thereon, as in Fig,

l. When the jack slips d from the hammerlever, the disengaging-bar does not etfirst partake fully of the movement of the, hammer- 1 lever;. but when the latter has. 'oom'e-to rest the disengaging-bar moves from stop-44 to' stop 43 until arrested by the letter.

Instead of placing the pins on the check- 'pin shafit, so as to accurately align the type g said teeth end the position-of the type on the g 2 type-wheel as to stop'and hold the letter when its type-propeylynlign with the impressionlhn'mmer. Inthis construction the disengaging-bar, insteedof being arranged tohave-a I 'mo'vementindependent of the hammer-leverg' ofis rigidly fixed thereto, so as to hevealways the same movement assaidhammer-lever.

The operation'of: this constrn'etion'is that-the stop on the key-lever is disengaged from the {check-pip shaft by theprojqetiqn on the wins engaging-bar (bf-the hammer-Lever before thg therefre rests' noragainst: upwardmovement by a hand-nut 85 rial ,860131011 of a, sphere. =By-th1s form. ell I 1 blurrmg from type in rows cont guous to that in use. is avoided. In its normal position the middle row. ofittype is'inalignment with the, impression-hammer. Thesaid type-wheel is pivoted at 45 to ajring 4 vvhieh.in turn is pivoted M47 to a eoller or projeetionl'eifi on'the 7 type-wheel shaft D. The two pairs of pivots I r are arranged at right angles to each other, so that theiype-wheel lies a, capacity for movement in all directions. The collar or projee 'tiou 481s formed on a hub which slides on tlieg'type-wheell shaft, and ibis hub is held fastened on the upper end of said shaft. To.

oscillate the type wheel so as tobring the topfandbottoni rows of type opposite the i npres-' sion-hammer, I provide the following mechen i ism: vA] braloket' 51 issecured tOStflndfld'dl; 9e -bye serew 52; passing freely through a. slot in the vertical arm of said bracket, so that theT same can be l movedfn p' and down lon'said standard, it being further guided by a, pin 54, which projects from the standard intosaid 5 slot. The upward movementof said bracket 2, is limited by two pins 55 and 56, againstwhioh p i the projections .57 and 58 of said bracket. abut 7 when pressed upwardly by" thespring' 59. 1: The bracket, 51 is provided with two up- Q'soo moving part maybe thedlsengaging-bar one. rying the projection aetingon thos op, or said hatacting on, a projeetion on the; stop,jand the said disengaging-bar may thusaot whether it has o'r'has not a; movement independent of the hammer-lever; Innll'these cases the ham- 'lnerflevef. maybe said toast to disengage the 6: stop and to. have connected therewith the means for effecting such disengagement. The

. said moving part may also be actuated by and attached to the pick, as in Fig. 12. The stop may henttached t o thejaclgas in Figs. 1 and 65 13,- or'be separated therefrom, a'a in'Figs. 12 end. 14, and s when so separated it may be shifted either -by a.lever forming part of the a suimbln V Li ia? iiiff-Ji $5Fiuf fi ii ii -fi' sired to bring a type. of the upper row into alignment with the 1mpress on-hammer,tlle- I .frontkey-bar 68 of the rocker-lever is. do :presse whioh eauses the shifting-levee 61 to t o k nits-pivot or fnlqmm 62, so as to de- 1" p ress the 'foi ked el l'd thereof. As the type wheel'i's embrao'ed hy this lever and as itis universally pivoted, it partekes of the movement ofjthe some and oscillates or tilts, so

thats type otthe upper row is brought down opposite the impressionhamlner. W hen-it is [3: desired-to ptint-a-type ofthe bottom-row, the rearkey-bar 67 is depi'essed, which causes that ed z s between t halfot thetype'wheelfacing the impression- I- hammer to tiltnpwerdly.

'ver 61.

The inking-ribbon (not shown) which is to be interposed between the type-wheel and impression-hammer passes to and from the type-wheel through-the spaces '75 between the pivot-pieces 63 and the forks of the forked le- When it is desired to inspect theletterlast printed, the type-wheel and inkingribbon can be lowered below the range of the impression-hammer by pressing down on the hub of the type-wheel or on the forked lever or on the bracket, so as to slide said hub on the type-wheel shaft. The spring 59 will return the bracket, and therefore the typewheeL-to normal position.

In the modification illustrated in Figs. 7 and 8 the type-wheel is pivoted to a crosssnaped piece 100, which in turn is pivoted in the arms of a yoke 101, secured to the typewheel shaft D.

The variable letter-spacing mechanism for the letters i, l, m, and *w is in part identical with that described and shown in my application hereinbefore referred to. The screw cylinder 76, provided with four ratchet-wheels 221 ,172 and 10 is loosely mounted on the rock-shat t 28,.so asto slide and rotate thereon: The screw-thread of said cylinder is engaged by the finger 77, mounted in the support 78,- secured to said rock-shaft. A spring 79 up erates to return the screw-cylinder to position when finger 77 is litted on the return movement of the carriage. The escapement 80 is loosely mounted on rock-shaft 28 adjacent to one end of the screw-cylinder, and is connected with the spacing lever 81, also mounted on said shaft'adjacent to the other end of said cylinder, the parts straddling the same, whereby said escapement is caused to partake of the longitudinal movement of said cylinder.

The escapement is provided with an arm or' extension 82, which rests on the rocking hamm'er-leverandby which said escapement is operated. The spring 83, bearing on the spaclug-lever, keeps the escapernent-arm in contact with the hammer-lever. The space-key lever 84 is provided with a vertical post 85,

ment of the hammer.

which engages the spacing-lever 81, where: by the escapement is operated without move- Said space-key lever is provided with two

projections

86 and 87, which are acted upon by the central bar 69 of the rocker key-lever. The key-levers i, Z, m, and w are provided with broad pawls 2 ,1 m5, and 10 which engage the ratchet-Wheels on the screw-cylinder torotate the same in one or the other direction, as required. The escapement (Jo-operates with the double rack barSS on the carriage-frame 89. As the part of the variable-spacing mechanism so far described, the carriage, and the means for tilting the rack-bar thereof are identical with the con strnctions shown and described in my application beforc referred to,it will not be necessary to more fully refer thereto herein.

Thety-pe on the type-wheel,the pins on the check-pin shafts, and the stops on the keylovers are relatively so located that the righthand edges of the types (looking down in Fig.

1O on the type-wheel and toward the impression-hammer) will align with the right-hand edge of or with an imaginary line on the hammcnface.

In Fig. 10 the type are represented as projecting from bases 90,wh1ch are all of the same width and on which the type are 'so 10- catcd that their right-hand edges coincide with the right-hand edges of the bases, the hammer being shown of a width equal to that of the bases, and its right-hand edgein line with the right-hand edge of a type. Thetypewheel, with its type so disposed or relatively located, co-operates with that part of the variable-letter-spacing mechanism heretofore described to produce the variable spacing desired. The operation of said mechanism may be explained in connection with Fig. ll. In said figure a strip of paper 11 is represented at the instant the letter a is imprinted thereon and before it is moved to the left. The right-hand edge of said letter is in line with the right-hand edge of the impression -hammer. (Represented by the dotted line m :r.) Let it be assumed that the type m and w occupy each a space in width equal to four units, the type "i and l a space equal to two units, and all other letters or characters a space equal to three units of measurement; also, that the space between letters is equal to one unit of measurement. As much the larger number of characters occupy a space equal to three units 'of measurement, the teeth of the rack-bar of the carriage are therefore so spaced as to advance the carriage four units of measurement at each'operation of the escapement. After the impression of the letter a has been effected the paper strip is therefore moved four units of measurement to the left, as indicated at 11*. If now the letter m or w were to be next printed and no provision were made to increase the movement of the paper-carriage to the left, the result would be as indicated on the strip 11z. 0., rnwould not be separated from a by the proper space. To

remedy this, the escapement is moved'to the left by the pawl m of the m-key lever acting on the ratchet-wheel m of the screw-cylinder to turn the same in the proper direction, so

that the finger in the screw-thread thereof will force the cylinder to the left, carrying with it the escapement, so that the instant the impression of m is made the paper will be in the position shown at11, and .m will be separated from.a by the proper space. At 11 a strip of paper is shown in the same position as the strip at ll at the instant the letter a is imprinted thereon. If now the letter i or I were to be next'printed and the escapemcnt were immovable laterally, tho

said letter when printed would occupy the position shown at 112'. e., the space between the two impressions would be twice that desired. To remedy this, the key-lever representing i has its pawl 71? so placed as to turn the right the; distance of one unit of measurement, so that the instant the impression is made the paper will occupy the position-indiro cated at 11, thus securing theproper amount of space between said two impressions. It is evident that this variable-spacing mechanism can be extended to inclndcothe'r letters than 14. The combination, with the check -.pln thosc referred to. shaft, ofakey'lever provided with a pivoted 80 r 5 Thevariable-spacing mechanism interferes or hinged -movable stop held against acci in a few cases with the slur movcmcnt here-t cntal displacement by friction, said step catoforedeseribed. For instance, when the keygable 'pfw being' moved out of the field oi levers representingiandm-are 'strucksuc -moyemeiit of the ChGCkvPll'] shaft while the cessivcly, the latter key-lever; cannot be de- .lfeyr-lever isin its depressed position,substan- 85 2o :pressed so long as the former is firmly held 'tially as described. f t

,sdown, for the said key-levers operate to turn 5. The combination, with the checkm. thescrew-eylinderin opposite directions. The: shaft and akey lever carrying a novable stop fact is, however, that the power exercised in provided with a foot, of a stop-bar for returnv depressing the last key-lever-is greater. than tug said movable stop to normal po'sitio'msnb- 9o 25' that exercised-in lioldingdown the previouslystantially as described. i

L6. Thecombination, with a key-lever prooperated one, so, that the latter is raised against the pressure of the finger and its pawl vided with a movable stop, of a cheek=pin shaft-with which said stop co-operates, and a removed from the. ratr'fi et-wheel so that the 'former'or last'depresse key can operate todisengaging hnr' or lever' for moving said 95 step to its inoperative position when ithas" e turn'the screw-cylinder, What is true of i andfnfl-"is true ofiall the other instances in performed its function, snbstantrally' asdewhich the key-levers successively depressed scribed. ogerate tq turn the serew-c'ylindorin opposite 7 7., The coinbinatiou, with; a key-lever prdfl1r9 60ns whenJno'w'bvelgt okey-lverssuevidovl xvith a. frictionally-pivoted. and 10v nlflq stop, of a. check-pin. shz l.ft and a. disenbax: or lever for movlng said stop to omtxve positiox). whexi it has perfornnoe? XtS ftlnction, su'bsmntially w Iosrcrib od- .l l in ti 7 k lovr -ro- V key-lever is retained in its depressed position,substantially asdescrihed. I

3. The combination, with the -cheekpin 75 shaft, of a horizontal key-lever provided'with a vertically-movable and frictionally-held' stop, substantially as described.

5 oessnvely operated r resenti zvnd lior 11x rfex'ence, for Said 4: s r -e rinaer V itsinob @s ain 211a \v, there may b no int l 132?, latter tovard thoret n-e; desixreb so or my xnv' ntiox1 tot 7 machine shown and deseribedi A curved shield 102 is secured totire'arms- 60 and projects over the typo-wheel, at illusinto its inoperative position, substantially as described.

trated in Figs. land 2-, This shicldco-oper- 10, The combination,- with a key-lever pro 126 55 ates witlivi'l cnrved guide-finger 103, secured vidcd with a jack and a movables'top, of a to the rea standard of the machine to render check-pin shaft,a hammerdever, and a disenthe placing or the paper more convenient and gaging bar or lever connected with said hamtohold it up tothe type-wheel. mcr-lcv'cr, substantially as described? ;WhatI claim, and desire to secure by Let: It. The combination, with a key-leve'r pro- :25 6o tors Patent ofythe United States, isvidcd with a jack and a movable stop, of 'a c 1. A key-lever provided with a movable check-pin shaft, a toothed locking-wheel, a stop capable of being moved out of its operahammer-levcr,a locking-pawl, and adis'ongag- ",tivep'osition while the key-lever is in its deing bar or lever, substantially as described. 1

' pressed position, in combination with a hold- 12. lhe combination, with a kcy-leverpror 0 65 ing means,sub stantially asdcscribethfor previdcd witlta jack and a pivoted movablestop, venting accidental displacement of said stop of a eheck'-pin shaft, a toothed wheel on said shaft, a hammer-lever, and a pawl and disengaging bar or lever connected with saidha-mmer-levei substantially as described.

13. The combination, with a key-lever provided with a jack and a movable stop, of a check-pin shaft, a toothed wheel on said shaft, a hammer-lever, and a disengaging-bar sepa rate from and moved by said hammer-lever and provided with a pawl, substantially as described.

14. The combination, with a heydever provided. with a jack and a movable stop, of a holding means, substantially as described, for said stop, a check-pin shaft, a hainmerdever, and a disengaging bar or lover connected with said hammer-lever, substantially as described.

15. The combination, with a key-lever provided with a jack and a'movable stop, of a chock-pin shaft,'a toothed wheel on said shaft, a hammer-lever provided with stos, as 43 and it, and a disengaging bar or 1 ver provided with a pawl and having a movement limited by said stops independent of said hammer-lever, substantially as described.

16. lhe combination, with a key-levcr provided with a jack and a movable stop, of a hammer-lever and a disengaging-bar provided with a disengaging projection, substantially as described.

17. The combination, with a key-lever pro vided with a jack and amovable stop, of a hammer-lever and a disengaging-bar provided with an adjustable disengaging projection, substantially as described.

18. The combination, with the check-pin shaft and its toothed wheel, of the hammerlever and a pawl connected with and actuated by said hammer-lever and arranged to co-operate with\ said toothed wheel, substantially as described.

19. The combinatiomwith a key-lever pro ,vided with a jack, of a hammer-lever, a dis engaging bar or lever provided with a pawl and connected with said hammcrdevcr, so as to move partly with and partly independent of the same, and a toothed wheel with which said pawl co-opcrates, substantially as doscribed.

20. The combination, with a type-wheel forming, substantially, an equatorial section of a sphere and provided with two or more rows of type, of a shaft to which said typewheel is universally pivoted, a pivoted frame 21. A. type-wheel in the form substantially of an equatorial section of a sphere, provided with two or more rows of type and universally pivoted to a rotating shaft, substantially as described.

22. A type-wheel in the form of an equatorial section of a sphere, provided with two or more rows of type, in combination with a rotating shaft and a ring pivoted to said shaftand to said type-wheel,the said pivots being located at right angles to each other, substantially as described.

23. A type-wheel in the form substantially of an equatorial section of a sphere, provided with two or more rows of type and universally pivoted to a shaft, in combination with a forked lever engaging said type-wheel, a supporting-bracket, and U-shaped pieces connected with said lever and pivoted in the bracket-arms, so as to provide a passage for the inking-ribbon, substantially as descr bed. 24. A type-wheel in the form substantially of an equatorial section of a sphere and pro-' on said shaft and resting on said bracket, and.

a type-wheel universally pivoted to said hub, whereby the typo-wheel is permitted to be shifted on its shaft out of-tho range of the impressiondiainmer, substantially as described.

capable of being shifted both to the right and to the left, of a type-wheel anda series of stopslocated to arrest said type-wheel, so that the right-hand edge of each of its type shall be brought into alignment with one and the same imaginary line, substantially as described.

Jonn PRATT.

Witnesses:

ltonr. lI. MAnn, Jr., A. 8. Famous.

. v 26. The combination, with an escapementt