US922534A - Variable carriage-feed for type-writing machines. - Google Patents

Description

J, A. SMITH. v VARI LE CARRIAGE FEED FOR TYPE WRITING MACHINES.

I APPLIOATION TliLB-D AUG. 23, 1904. 922534. Patented May 25, 1909.

{SHEETS-SHEET 1.

I J. A. SMITH. VARIABLE CARRIAGE FEED FOR TYPE WRITING MACHINES.

APPLIUATION TILED AUG. 23, 1904.

' Patented May 25, 1909.

4 SEEET8SHBET 2.

- uomsrum: Inc mm vusnmum 04c J. A. SMITH. VARIABLE CARRIAGE EEED FOB TYPE WRITING MACHINES.

I v APPLICATION FILED AUG. 23, 1904.

.922, Patented May 25, 1909.

4 SHBEIS-SHEET 3.

muus rum, 1%

, J. A. SMITH. VARIABLE CARRIAGE FEED FOE TYPE WRITING MACHINES.

APPLICATION FILED AUG. 23, 1904. 922,534. Patented May 25, 1909.

4 SHEETSBHBET 4.

1. a shown in dotted-lines; Fig.

UNITED STATES PATENT OFFICE.

A. SMITH, .OF vCLEVELAND, OHIO, ASSIGNOR TO ELLIOTT-FISHER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

7 VARIABLE CABBIAGEQFEED FOR TYPE-WRiTING MACHINES.

Specification ofLettersi Patent.

Patented May 25, 1909.

' Application filed August 23, 1904. Serial No. 221,859.

. useful Variable Carriage-Feed for Type- Writing Machines, of which the following is .a specification. My presenhinvention relates to typewrit- '10 in'g machines, but more particularly to novel "carriage feeding mechanism designed with special reference to the equipmentof a machine of the flat platen type. I

The object of the invention is to produce an eflicient carriage feeding mechanism, and 'to' provide for the variable feeding of the carriage in the direction ofletter spacing so that wide or narrow spacingappropriate to the characters printed, or to the particular class of work may be secured. It may be explained that in certain machines two distinct alphabets of type are employed, the characters of one being broad and of the other comparatively narrow. In such machines it' desirable to provide a variable carriage feed 111 order that the letter spaces produced by the step-by-step advance of the carriage may be uniformly wide or narrow, accordingly as wide or narrow characters so are printed.

This invention is directed to the attainment of the end stated, but it should also.

be borne in mind that its utility is not confined to its use in connection with machines equipped with two distinct classes-of wide and narrow type, since it is equally useful "in printing certain data, as for instance,

headings, names, etc, with exag erate'd spac ing of the letters, irrespective of .40 lar character of the latter.

- In the accompanying drawings-Figure 1 is a rear elevation of '21 Fisher typewriter equipped in accordance with my invention. F ig. 2 is a sectional plan view of a portion ,45 of machine thus equiphed. Fig. '3 is a transverse section through the machine carriage and a portion of its support, the depressed position of the case key and the op-- Iferative position ofthe space rack being is a longitudinal section 'of-Jthe carriage showing its sup- -port, the "space rack, the escapementand certain other parts in elevation. Fig. 5 is a detail View showing the escapement, with theparts in thepositions they assume at the A. SMITH, a.

the particuinstant of retardation of the holding dog to permit a double space movement of the carriage. Fig. 6 is a perspective view of the mechanism'forcontrolling the letter space movements of the carriage designed more particularly-to show the line of connection between a key and theescapement as well as the connectionbetween the case key and the means for changing the carriage feed. Fig. 7 is a detail view of the trip arm. Fig. 8 5 is a similar View of the shift rod, and Fig.

'9 is a detail sectional view ofthe rack and trip arm.

The carriage feeding mechanism, while capable of generallapplication to machines 7 embodying an element arranged for intermittent advance, is designed, with special reference to the equipment of the Fisher typewriter shown inthe drawings, but more fully illustrated in a number ofv patents, notably No. 573,868 to R. J. Fisher. The

Fisher machine isof the fiat platen typeand it includes aca-rriage supporting frame 1, mounted to travel in the direction of line spacing upon tracks or. guides 2 carried by a 30 platen 2 the writing surface of which is indic'ated in Fig. 1. The framel is provided with front and rear carriage guides 3 and 3", see Fig. 3, upon which travels in the direction of letter spacing, a carriage 4,- sup- 5 porting a pendent type-bar supporting ring 5 upon which the downwardly acting typebars 6 are supported. v I The carriage 4 is moved to the right by" suitable carriage'propelling mechanism gen- 'erally including strapsor tapes 7 a connected at their outer ends to spring drums 7;

Movable with the carriage are a pair of carriage pinions 8 and 9 meshing with front and rear feed racks 10 and 11 parallel with and secured to the carriage guides3 and 3 of the machine frame. These pinions are mounted upon a common feed-spindle 12 extending transversely through the carriage casing and having operative connection with a ratchet or esca-pement wheel 13 constituting a rack element for what may be termed the escapement proper. Since the spindle 12, which is movable with the carriage, is geared bythe pinions 8 and 9 t0 the fixed racks, it follows that the escapenient wheel being'operatively a connected with the spindle, must rotate when the carriage'moves forward in the direction of letter spacing. Therefore, the movement of the carriage is controlled by .a pair of .escapement do%, towit,fa holding dog 14 and a spacin 15, pooperating with the wheel 13 an constructed and arranged in the manner disclosed "in the Fisher patent before identified.- Normally, as shown in a Fig. 4, the holding dog engages the wheel j 13 and-holds the same thus preventing the forward movement of the carriage. When,

however, the dogs are 'swung,'the holding og moves out of engagement with the 'wheel, but'before the disengagement is ef fected, the'spacing' dog moves into engagement. This movement of the parts is efl'ected by-the depression of anyone of the letter or numeral keys 16. When the key is released,

however, the movement of the dog is reversed, and,-while the spacing dog is moving 'out of engagement with the wheel and be- The operatingfmechanism between the.

1 extending fromithe spacing dog *and cons.

' is vibratedby key .lyokejs" 2limounted to.

fore the holding dog moves integengagement therewith, the wheel is permitted to rot-ate an almost inappreciahle distance so that the holding dog instead of moving back into engagement with the flat face of the tooth before engaged by i t,'will engage the next of one letter-space before the arrest of. the wheel is effected bythe holding'dog;

keys an'd'the .escapement includes anarm 17 nected by a link 18 to an arm 19 projecting from the rock shaft 20 exten di'ng 'longitudinally of the carriage, see Fig.6. This shaft swing within the casing and arranged to be engaged and swung by a pin 22. (one of purpose of efiectingthe feed '0 Y swung 'cated.

which is carried by each Q key stem) just as the key reaches the limit'of its'downwardmovement.

- l ey thusefi'ects the swinging 'of the yoke 21 to rock. the shaft 20 and thus shift the 'es- Thecompletedepression of. a

capement dog's,'the.re1ease of the key servingto'permit the dogs to swing the carriage,

. ina manner already stated. To effect the release of the lcarriage' 'from"control by the g V indicated in dotted lines in Fig. 8, the trips 115 escapement, the esca 'ementlever 23 ',(de-. signed to be. operatefby a carriage release key, not shown is arranged to move the dogs relatively or the purpose of releasing the es'eapemen't "wheel-T entirely "therefrom,

it being. understood that while the'dogs are mounted for movementin unison under nor- .malconditions, they'are capable of'being independently for the purpose indie The construction thus far described'is ordinary, but an understanding thereof is necessary to a proper comprehension of my improvements. From what has been said, it will be evident that the letter space movements of the carriage will be only of such through theback' wall of the carriage casback for theextent as is-permittedv by the movement of the escapement wheel 13 the distance of one tooth. This is the normalmovement and. p'rovideswhat may be termed normal or narrow spacing. To attain the object of the present invention, it is merely necessary to provide for a'greater movement of the escapement wheel 13 upon eachgictuation of the dogs by the depression and release of the key, since this w111 obviously effect a proportionate increase of each advance step or movement of. the carriage.

Connected to or formed as an integral part of-the holding dog 14 of the carriage escapement, is .an arm 24, the end of which .80 is disposed for enga ement-hy an arm 25 I extending laterally rom. a rock shaft 26 provided with a'bearing sleeve 27 extending ing, see Figs; 3 and 6. At the extremity of the shaft 26 in rear of the carriage is fixed a trip arm 28 having at its end a pointed beak or projection 29 which is. arranged to Contact with a series of relatively fixed trips 30, preferablyin the form of pointed equidistant ,teeth defined at the under side or. edge of what may be-termed a spacing rack 31. This rack while stationary relative to the trip arm when in its normal position,-is nevertheless laterally movable in order to permit its presentation in either an operative or an inoperative position. To provide for this movement of the rack, it is car- -riedat the upper ends of a .pair of swinging porting brackets 33 secured to the mac hine framel at any suitable point, but prefet-ably to-the rear side of the guide 3*. Normally. the spacing rack 31 is located in an inoperative positi on, as shown in full linesin 9 ,Fig. 3, and when so disposed the trips-01 teeth 30-are arranged out of the path of'thev projection-29 on the arm 28 to permit the normal operation of the escapeme'nt in the Yiding normal or narrow letter spacing'of the carriage. -VVhen, however, it is desired I to provide exaggeratedor wide spacing-the rack 3'1Zis swung to its operative position,

or teeth .30 being presentedin operative relation with the projection 29 on-the arm, 28.

action" of the dogs is .precisely as heretofore described. That is to say, the holding dog moves out ofengagement with the wheel 17 and the .spaeing dog moves into engage.- m'ent therewith, the wheel being permitted such slight movement during this operation of the parts as will carry the extremity of the wheeL tooth beyond the nose of the hold ing dog ,so that upon-the return of the latter it cannot engage the same tooth. Upon the release of'the key,'however, a variation: in.

arms-32 having hinged connection with sup- 100.

manner described for the purpose of pro- Now, upon the depressionof the keyg'f-the, I

[the action of the escapement may be noticed: 13-0 As the key risesthe spacing dog will move out of engagement with the wheel and the holding dog will simultaneously move toward the wheel for reengagement therewith. As soon as the Wheel is released by the spacing dog, it will begin to rotate and the carriage will begin to advance, but just at that instant when, under normal conditions, the holding "dog would move into engagement with the next succeeding tooth of the wheel to arrest the carriage at the limit of a normal letter space, the pointed projc tion 29 in the arm 28 will engage thee-xtremity of one of the trips or teeth 30 which will retard the movement of the holding dog until the extremity of the tooth next succeeding that originally engaged by it has passed the nose of the dog. Owing to the factthat the engaging portionsof the trips tltland projection 29 are pointed, this retardation of the holding dog will be but i'nomentary. This, however, will be sufli cient to insure the escape of two teeth of the wheel instead of one and a double or exaggerated movement of the carriage will,-

therefore, be effected before the holding dog arrests the escapement wheel.

\Vhile it is not essential that special means he provided for swinging the spacing rack into and out of position, such movement as a matter of fact. is effected by means of a key located at the keyboard and, since the change y from narrow to wide spacing isldesired when the wide or upper case type are brought into action, the case key which etl'ects this rearrangement of the printing mechanism is utilized to; shift the spacing rack. The typebars 6, two of which are clearly shown in Fig. (3 of the drawings, are each equipped with what is known inthe art as a plural type head 34 pivotally mounted at the upper free end of the bar'and carrying upper and lower case characters 35 and 36. Each type head is nornn lly retained by a trigger 37 in a position which will insure the presentation of the lower case character 36 to the printing point when the type bar is thrown down by the depression of a key.

.The trigger 37 is mounted on the type-bar, as shown, and is provided with a cam-shaped tail-piece or trip arm 38 and with a resetting trip ring 40 normally occupies a position sufficiently elevated to prevent interference with the trip arms of the triggers when the type-bars are swung down. When, however,

it is desiredto print an upper case character,

or one having a wide face,

the trip ring is depressed,,s0 that the trigger 'which'is shown in Fig. 6. Th

rear extremity of a of any actuated type-bar 'will be swung out of engagement with the type head, by reason of the engagei ment of the tail-piece 38 of said trigger with the type ring during the initial moyement of the bar. The tripping of the trigger in this manner and the consequent release of the tyipe head, will permit the latter to shift un position and the restoration of the trigger toits position in engagement with the head is insured by the contact of the resetting arm 39 with a fixed buffer ring 4 1, a portion of e depression of the trip frame 40, for the purpose stated. isielfected through the medium of a case key 45, whose stem 46 is suitably guided in the carriage casing and is connected at its lower end to the case key lever 47 fulcrumed atits opposite end, as indicated at 48, and pivotallyconnected intermediate of its ends to the stud 43.

. The case key 45 is normally retained'in its elevated position by a spring 49 and is provided with a pin 50 engaged by a locking device or catch 51 when it is desired to hold' the key in its depressed position for the purpose of printing upper case characters .e.\'- clusively. For a morecomplete disclosure of the mechanism just described, reference is made to the Fisher patent heretofore identified and also to Patent N 0. 708,213, and Reissued Patent No. 11,848, both to It. J. Fisher.

The operative connection between the case key and the spac ng rack 31 is effected in the following manner: In the back wall of the.

carriage casing l is secured a bearing sleeve 52, retained in'place by a lock nut 53 and constituting a support and bearing for a shaft rod 54, provided at its rear end with a head 55' engaging the rack The inner end of the rod 54:is pivotally connected to the lower extremity of an arm 56, depending from a rock shaft 57 disposed longitudinally of the carriage casing and mounted in brackets 58 extending from the rear wall thereof. Adjacent to one end of the shaft 57 the latter is provided with a forwardly extending arm 59 connected by a vertical link 60 with the lever 61 fulcrumed in a post '62 upstanding from the. bottom of the carriage. The lever 61 is extended to the front of the carnage, see Fig. 3, where its extremity is pivot-ally connected to the stem 46 of the case key45. .It will now be seen i that with the depression of the ease key to reorganize the printing mechanism the shaft '57 will be rocked to swing the arm 56 to the position indicated in dotted lines in Fig. 3 and thus draw back the shift rod 54, which .Will swing'the spacing rack 81 to its oper-ji I The depression of the case ative position.

key will thus seen to simultaneously projection spacing.

' dogs alternat mal spacing l v relatively movable,

.inga rack member and a pair of dogs, and

(means for repeatedly change the feed-and the case and obviously, as soon as the case key is released, its retraction by its spring will serve, through the intermediateconnections, to throw back the rackB-l to an inoperative position and thus 11 store the normal carriage feed. To insure the movementof the rack to its operative posi'tifon, yeven though when actuated the 29is'opposite the point of one of theteethfiO, the adjacent faces of said rack teeth 30 and the projection 29 are oppositely beveled, as shown in Fig. 9.

It is thought that the construction and operation of he'present embodiment of the invention will be clearly understoodirom.

theforegoing; but I wish to be distinctly understood as reserving the right to effect such changes, modifications and variationsof the illustrated structure as may come 'fairly withinYthe scope gt the protection prayed. i v

"VVhatI claim is- In a'type'writing machine, a platen and printing mechanism, relatively movable to space the characters printed, an escapement controlling such movement and including an escapement rack, means for operating the escapement to eii'ect normal spacing of the platen and printing mechanism, and a spacing-rack extending in the direction of the relative movement of the platen and printing mechanism and cooperating with the ese'apement to cause exaggerated operation thereof for the purpose of 'exaggerating'the 2. In a relatively movable to letter space the writing, of feeding mechanism controllingsuch movement and includinga rack member andengaging the same for nornd a plurality of devices disto retard the movement posed successively of one dqg'toexaggerate the relative move.

ment of the platen and printing mechanism. incidenta to the printing operation.

3. In ypewriting machine, tion with a. platen and printing mechanism, of feeding mechanism cont-rolling such movement andv including a. ra'ckmember and a pair of dogs c05per'at ing therewith for normal spacing, and a spacing rack havinga series of teeth arranged to effect the repeated retardation of one dog to exaggerate the relative movement of the platen and printing mechanism.

4;. Ina typewriting machine, the combination with a platen and printing mechanism, relatively movable, of an escapement operated by the printing mechanism and includretarding one of the dogsto repeatedly exaggerate the relative movement ofthe platen and printing mech anism incidental to the operation. of the the repeated of the escapement.

typewritingmachine, the combination With a platen and printing mechanism,

the combina platen eaasea latter, said means being movable'into and out of operative positlon. I

5. In a typewritlng machine, the com bination with a platen and printing mechanism, relatively movable, of an escape ment controlling such movement and ineluding a rack element and a pair of dogs,

and a series of devices arranged to succesable in unison into and out of operative position and automatically brought into actlon" when in operative position, by the relative movement of the platen and printing mechanism incidental to the operation of the latter.

relatively movable, of an escapement includmg a rack member and a pair of dogs coop- 6. In a typewritingmachine, the combination with a platen and printing mechanism,

erating therewith, and a laterally shiftable spacing rack having teeth arranged to effect 7. In a typewriting machine, tion with a platen. and printing mechanism, relatively. movable, of an escapement controllingsuch relative movement and includ:

ing a rack member, a spacing rack cooperating with the escapeme'nt to exaggerate such relative movement, and key operated means for effecting a cotiperative relationbetween the escapement and the spacing rack.

8. In a typewriting machine, the combination with a platen and printing mechanism; relatively movable,

space the writingand including a rack member, a spacing rack designed to coiipcrate retardation of one of the dogs the combinaof an escapenient controlling such relative movement to .letterwith the seapement to exaggerate the relative movement of the platen and' printing mechanism, and ing rack to its operative position.

' 9. In a typewriting machine, the combination with a platen and printing mechanism, relatively movable, trolling such movement and including a rack member, and a swinging spacing rack arranged to cooperate with the escapement to -'0f an escapement c011 a key for moving said sp'acexaggerate the relative movement of the.

and printing mechanism.

10. In a typewrltmg machine, thefcom bination with a platen and. printing mechanism, relatively movable, of an escap'ement controlling such movement andincluding a raclr member, a swlnging spacing rack arranged to eoeperat'e with the escapement to exaggeratethe relative movement of the i platen and, printing mechanism, and means for swinging the spacing rack from one position to I another.

11. In a typewriting. machine, 'thecombination with a traveling carriage andprintmg mechanism mcludmg keys, of'an escape.

a trip arm at the opposite end of the rockshaft, and a series of trips disposed toengage the tri .arm. y

'26. no a typewriting machine, the combination with a carriage and an escapement controlling the movement thereof, of a trip arm operatively related to the escapementand having a pointed tooth, and a series of trips having the form of pointed teeth disposed to be successively enga ed bythe tooth of the trip arm to repeated effect a mo-' of an/element of the bination with a platen and printing mechanism, relatively movable, ofan escapement controlling-such relative movement, a laterallymovablespacing rack arranged tocooperate with the escapementto exaggerate the movement, a shifterfor moving the rack I to'its operative position, a rock-shaftconnected to the, shifter to move the same, and a key 'operatively related to the rock-shaft. 29. The combination with; a platen and printingv mechanism relatively movable, one with respect to the other, of an escapement controlling such relative movement for normal spacing, and operated vby the printing mechanism, and means broughtinto action 40 repeatedly by the relative movement of the platen and printing .mechanism, incidental to the operation of the latter, to repeatedly exaggerate the normal operation vof'the escapement' and; thereby effect a uniform-exaggeration of the relative movement of the platen and printing m'echansirn- 30. Thecombination with a ;platen and printing mechanism relatively'movable, one

with respect to the other, the direction of letter spacing, of an escapement, operated by the printing mechanism to cause uniform narrow spacing, and a series of devices brought into action by the relative movement of the platen and printing mechanism incidental to the operation ofthe printing mechanism to cause the exaggeration of the normal 0 eration of the escapem'ent and thereby efi ect an exaggerationof-the relative movement of the platen and printing mechanism for uniform Wide spacing.

31. In a typewriting machine, the combination with a'movable carriage and printing mechanism, of an escapement controlling the movement of the carriagefor normal spacing and operated by the printing mechanism, and

means brought into action repeatedly by the movement. of the carriage incidental to the operationof the printing mechanism to repeatedly exaggerate the normal operation of the escapement and thereby effect a uniform exaggeration of the carriage movement. I

In a typewriting machine, the combi nation 'with a carriage, of an escapement rack, dog mechanism cooperating with the rack to control the movement of the carriage for uniform narrow spacing, normally inoperative means which, when in operative position, is brought into effective cooperative relation with the escapement mechanism-by the movement of the carriage, to exaggerate the action of the escapement' and thus permit exaggerated movementofthe carriage'for uniform wide spacing, and means for rendering said normally inoperative means operative.

33. In a typewriting machine, the combination with a movable carriage, of an escapement controlling the movement of the carriage-for normal spacing, saidescape mentincluding a holding dog, a spacing dog and a rack member alternately engaged bysaid dogs, the spacing dog being normally engaged with the rack member to hold the carriage against movement, a key arranged to operate the escapement dogs to move the spacing dog out of engagement withthe rack member and to move the holding dog into engagement with the said member, means operative upon the release of the key to advance the carria e means 0 era'tive upon the release of the key to withdraw the holding dog from the escapement member and thus permit the advance of the carriage and to move the spacing dog toward the,

rack member to arrest the carriage, a't-rip brought into cooperative relation with the spacing dog by the movement of the carriage to retard the movement of said spacingdog toward the rack member and to thus permit an' exaggerated movement of the carriage before such movement is arrested by the engagement of a spacing dog with the rack member, :and means operative to .determine whether the trip shall orshall not operate as stated, said means including a key or finger piece.

3a. In a typewriting machine, the. combination with'a movable carriage, of an escapement wheel movabletherewith, a pairof connected dogs also movable with the carriage and arranged to alternately engage the escapement wheel at opposite sides thereof to control the movements of the ca riage, keys for operating the dogs, a series of trips on the frame of'the typewriter, and-a member extended from one of the dogs and arranged .to be moved into engagement'with the'under sides of the trips, by the advance of the carriage to repeatedly retardl the movement of said'dog to its engaging postment controlling, the movement of the can .i'i'al ean'd" iiibluding a rackflmemben, India cooperatnig with the escapemei-it to exaggerate-the carriage-movement. t

1 121 111 a vvt p'ewritin'g machine, the combination wit atraveling carriage T of an it: escapement' movableth'ereivith and in cluding a' ra ck member and a' niii JoFdogS, and'means, m un ted independently of the carria e and coiiperating with the escapement to e :ect an I exaggerated butuniform carriage feed. R .1'5','- 13. In i'a typew-riting machine,fthe com: ".bination' with a movable carriage, pf an escapement movable therewith and includt a'rack member and a pair-of cooperating. dogs, and a spacing rack m ounted independ- ,ently of the carriage andhaving; teeth arranged successively to retard one of the :escapementdogs for the purpose of exaggerating the'carria'ge feed.

. In a typewriting machine, the combination with printing mechanism and a movable carriage," of an escapement operated .by thc'printing' mechanism -to control the .step-by-stepmovement of the carriage and including a rack member and a pair ot' dogs, means co iiper'atin'g with one oi. the dogs of the escap'ement to effect an exaggerated stepby-step feed ofthe carriage a, the escape- 'Inent is ope 'ated by the printingmechanism, andpniechanisln "operative to determine whether said means shall or shall not p'pe rate. I 15.1 11 a 'typewritingmachine, the combination-witha' traveling carriage and an escapement movable therewith and including arack member and cooperating dogs, of a 40 sda'cing-rackmounted independently of the carriage and cooperating with the escapemenhto exaggerate t-he carriage feed, and means mounted on the carriage for moving he spacing rack to its operative position.

',16.,-In a typewriting machine, the 001m bination with a platen and printing-mechanism, relatively movable, said printlng mecln. anism including. a case key, of an escapementcontrol-lingfsuch' relative movement and in- '5 "eluding a rack member and a" pair of. co-

0perat1ng dogs, and means, movable to its operative position by the case keyfor re" 1 tarding the movement of an escapement dog to exaggerate the feed.

17. In a typewritmg machine, the com-- bination with a platen and printing mechanism, relativelymovable, saidprinting nc ch anism including a case key, of anescapementcontrolling the normal relative moven'ient of 6 the platen and printing mechanism and in:

cludlng a ,rackmember and a pair of cooperating dogma-spacing rack designed to cotiper ate with the escapement to eiiect an I exaggerationof the relative movement of the 3 2 platenand printing mechanism, and. means Qperativel-y connecting the case key with the "rack; whereby the depression of said key will eiiectac'hange of case and of feed.

[18.111 a' typewriting machine, the coml oiIi'ation \vith'a platen and printing mechan ism, relatively movable in the direction of letter spacing, of an'escapement controlling the inornial. letter space movements of the niac'hine, a series of trips, and meansoperated by said trips for, exaggerating the letter.

space movements.

bination with a platen and printing mechan ism, relat vely molvable, of an es capement controlling the non'ial letter space movement s,sa trip arm' operatively related. to the escapement to effect. an exaggerated j feed,

and a series of trips for operating the arm.

20;, In a typewriting "machine, the combination iwitlra traveling carriage, of an .escapement movable with thecarrlag a trip a rm 'likwise movable therewith and opera; tlvely re ated to the escapement, and a 881165 of trips mounted independently of ,the care riage and arranged to cooperate with the trip arm. I I I I 21. In a typewriting machine, the combinat-ion with an escapement comprising a 19.;ln $1. typewriiting machine,- the comrack member and a' pair of dogs cotipera'ting',

therewith, of means foretfecting the normal I operation of the escapement, an arm 0peratrvely related to tine of the dogs, and-means for dperating said arm to repeatedly retard the movement of the dpg for the purpose'of efiecting an exaggerated operation of the escapement.

22. In a typewriting machine," the'conibination With an escapement including a .rack member and cooperating dogs, of a trip 'arm 'operatively related to one oithe dogs,

anda series of trips disposed to engage the.

trip arm.

23. In a typewriting machine, the combination with an escapement including a rack member and cooperating dogs, I of a rock-shaft cooperatively related I to one of the dogs, a trip arm extended fr0m one end of the rock-shaft, and afplurality of trips' disposed to engage said arm.

24. In a typewrlting machine, the com-. binatlon with a movable carriage, 015. an escapement mounted on the carriage and in cluding a rack member and cooperating dogs,

a' rock-shaft also mounted on the carriage and operatively related to one of the' dogs,

a trip arm, extending from the rock-.sl1aft,'

and a series of trips mounted independently of the carriage and disposed to engage trip arm; I

25. The combination with aitypewriting machine, of an escapement including a rotary rack member and a pair of cooperating the dogs, an arm extending from one of said i dogs, a rock-shaft'provided atond end-with an arm cooperating with the arm first named,

tion and thus permit exaggerated or abnormal movement of the escapement Wheel before the same is arrested by the do 35. In a typewriti ng' machine, the combinatmn with a carriage, of an escapement controlling the normal step-by-step advance of the carriage, carriage release mechanism arranged to operate the escapement to permit thefree advance of the carriage, and

means independent of the release mechanism 'thereot, carriage release mechanism, and

means independent of the release mechanism and brought into action by the movement of the carriage to exaggerate'each normal action of the escapement during the carriage advance and to thus cause uniform wideor abnormal spacing of the characters printed. 37. In a ty ewriting machine, the combination with a carriage, of an escapement controlling the normal step-by-step advance of said carriage, carriage release mechamsm, a ser es 0t devices mounted independently-0f the release mechanism and carriage, and

' means presented to successive devices by the movement of the carriage and cooperating with said devices to repeatedly exaggerate the action of the escapement during the carriage 'advance and to thus cause uniform wide or abnormal spacing of the characters f i in the presence of two wltnessesj printed.

38. In a type'vvriting machine, the coinf bmatron with a carriage, of an escapem'cnt controlling the normal step-by-step advance] thereo't', carriage release mechanism and a series of devices mounted indepeiidently of the release mechanism and movable into and out of operative posltlon, and means coacting with said devices to exaggerate the action of the eseapement and thus cause uniform wide or abnormal spacing of the characters printed.

39. In a typewriting machine, the combination with a carriage, of an escapement including a rack and dogs controlling the normal step-by-step advance ofthe carriage, release mechanism operative to disengage the rack and dogs and thus release the carriage for free movement and means separate from and independent of such release mechanism and iucludii'ig a series of devices, said means being brought into cooperative relation with the escapement by the movement of the carriage during its stepbv-step advance to cause (3X2 ggerated operations of. the escape- I ment and thus effect wide spacing of characters printed.- I

40. in a typewriter, the combination with a platen and printing mechanism, relatively movable, of an escapement controlling such movement and operated by the printing mechanisnn and means for repeatedly exaggerating the relative movement of the platen and printing mechanism incidental to the operation of the latter. said means including a series of devices which when in operative position are-brought into action automatically, one of said devices being variable to render the same operative or non-operative.

in testimony that T claim the foregoing as my own l have hereto afiixed my signature JOl-lh A. SMITH. 'itnescosi J. ZIEGLER, V. 'l.. h'loltlnnor.

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