US1061639A - Type-writing machine. - Google Patents

Description

A. W. SMITH.

TYPE WRITING MACHINE. APPLIGATION FILED I)E0.17, 1912.

1,061,639, Patented May 13, 1913.

4 BEEBTS-SEEET 1.

wlwzaazi HI AT-TWM A. W. SMITH.

TYPE WRITING MACHINE.

APILIUALION FILED 0501'], N112 1,061,639. Patented May 13, 1913.

4 SHEETS-SHEET 2.

\A/ITNEEISEi INVENTDR;

HEATTUR'NEV WWW A. W. SMITH.

TYPE WRITING MACHINE.

APPLICATION FILED DEG.17,1912.

Patented May 13, 1913.

4 SHBETSSHEET 3.

WEATTURNE[ A. W. SMITH.

TYPE WRITING MACHINE.

APPLICATION FILED DEG.17, 1912.

1,061,689. Patented May 13, 1913.

4 SHEETS-SHEIIT 4.

UNITED STATEESPATENT OFFICE ART U W. smirn, or nnw' ronn; mQnssienOn, BYMESNE nsemmtnit rsfro REMINGTON TYPEWEITEECOMPANY, ILION, NEW YORK, A. CORPORATION "OF 3 women;

new YORK.

rrrnwmmme mnonmn Specificationof Lettersiatenh Patented May 13,

To all whonte't mayconc erh Be it known that I, ARTHUR of the borough of Manhattan, city of New York in the co-iinty ofNewifiYork and State of New YOIk, have invented certeinnew and useful Improvements in Type- Writing following isle specii i normal position after havingafi'orded afnll Jetteffeed movement of the carriage. Fig. 6 1S a'frngmentary vertical fore and aft sec- 'tlonelviewof the escapement mechanism Machines,- of which the fication.

chines and more particularly to yeriable carriagefeetl mechanism.

By my invention, astshown in the present instance, I provide carriage escapement mechanism which effortlsdifierent extents of feed. depending on the particular keys which are actuated so, for example, that e comparatively short feed of thecerriage may be afforded Whenprinting a character which occupies but little widthwise space land a comparatively long feed of the carriage is afforded when prlnting acharecter vhich occnpies a greater wldi lhwlfiie space.

The main ObI|ECtSiOf my nvent on, generally stated are to yprovidecomparntiy-ely lianism of the character specified simple rnec i and one which 15 eflicient and rel able n actionnnd can be readily introduced nto existingforms of typewriting niachines Without modifying, (JlilI lfiltl'lllly modifying, the structural featuresof said machines as they now exist. 1

To the above and other endsvlwhichfwill hereinafter appear, my inventionconsiete in y, es

the features ofconstruction, arrangements 'of parts and combinations 0f dE3VlCe SSGtforth in the following description antiperyticnlarly pointed out the appended claims.

,In the accompanyingdrawings wvherein like reference characters indicetefcorresponcling parts'i nthe various views, Figure f 11 is a fragmentary vertical foreand eftseo tional view of a, No. 10 or 'No. 11 Remington machine embodying myfinvent-ion5 although some of i the parts are omitted and Others I thatere shown are onlyconyentionelly represented, Fig is a fragmentary enlarged deteilrea-relevation, partly in section, of a portion of the escapeinent mechanism, i the perts being ehownzis they appear when in the normal posltion, or posltion ofrest.

3; is a side elevation: I Of thB same parts in section. Fig. 4is anenlargedyde tailfragmentary frontelevation Ofe portion Application filed December 17, 1912. Serial to. 137,241;

MV invention relates to typewriting nia partsrlisposecl as they appear at the ,termi nat onolithe down stroke ofe printingkey that controls a type Or types which require the greettitt extent of carriage feed. Fig. 5 s i l ke View oftheeeme showing the parts d sposed as they appear after the keyhas been released t nd the parts are returned to tion of the same with parts in section, the

ivietv showing' the parts disposed in the seine posit ons that they occupy in Fig; 6. FigQB 1 of theeecapeinentmechanism showin -th t se icitizen of the United States, and resident end some of the associated parts, the View.

is a fragmentary detailperspective View of 1 l the so'acalled auxiliary universal bar andone ofthe adjustable; contact devicesfcerried thereby. Fig. 9 is a transverse sectional view taken on't-hefline team of Fig.1 and looking inthe direction of the arrow ateaid line, theview showing the key levers and mixiliary nniversalbarl f I I ha ve shown invention embodied in the present inst-zineeina N0. IOOnNO. '11 Remington ma chine in which the invention may be readily included Without modifying, or materially modifying, thestriicturtilfea hires said nnchines as they now existiex cent inso far as some ofthe part9 ordinamy employed may be replaced by thm-iedisjclosed herein. It should be underetood, hoxvever, that the intention may be einbodied in various stylesbf typewriting niacfhines endihat various changes I W be inacleto facilitate jsuch embodiment of the invention. V i y t Theiframe of the machine comprises a base Iycornerposts 2 and a top plate 3. A,

carriage 4 supports it rotetit'e cylindrical platen 5 and isintirnntedon ball or roller hearings 6 formoveinent fromside to side of "the n achine overjjthe top late thereof.

Thera'rriage is propelled in its letter feed movement from right to leftby the usual spring drum 7 operat-ively connected with the carriage by a strep'or hand Arms 9 nrepi totedet 10 on the'carriflge and extend rearwnrdly therefrom where it they r are con- ;neoted to a feed rack 11; which meshes with the usual feed pinion 12. Thisfeed pinion isfixed to the forward end of a shaft 13 which is mounted to turn in a bearing support 14 fixed to the top plate of the machine, From an ins ection of Fig. 3 it will be seen that a hub-lilie member 15 is carried by the shaft 13 and is fixed thereto by set screws 16. These screws are received in tapped openings in the hub 15 and bear at their inner ends against flattened faces 17 (see Fig. 2) on the s'haft 13. This hub-like member is therefore fixed to turn with the shaft 13.

' The hub is formed with a circumferential flange 18 and an escapement wheeler rack 19 is formed with a central opening'20 by which it may be received and supported on a circular shoulder 21 formed on the hub.

Screws 22 extend through openings in the flange 18 and are received in tappe openings in the escapement wheel tori idly secure th' eecapement wheel to the hu 15; A back spacing wheel 23 may be secured to the hub 15 by'screws 24. It will be understood therefore that the shaft 13, hub .15, escape- 'ment wheel 19 and back spacing wheel 23 extending arm or supporting member 59 of are all rigidly connected to turn together.

The type actions shown are such as those commonly employed in the No. 10 and No.

' 11 Remington machines. Thus the key actuated devices or key levers 25 and 25" have finger keys 26 and 26* and are fulcrumed on a fulcrum bar 27. The returning 5 rings 28 are each connected at one end to a ey lever v and at its opposite end to a plate 29 secured to the base of the machine. Each key lever is connected to an upwardly andrearwardly striking type bar 30 through intermediate actuating links 31 and 32 and a sub-lever 33. The various type bars are segmentally arranged and adapted to move upwardly and rearwardly to strike against the front face of the platen.

Arranged transversely of the machine beneath the series of key levers is the ordinary universal bar 34 with which vertically adjustable contact screws 34" which are carried by the key levers are adapted to engage to actuate the universal bar. bar is connected by upwardlyextending links 35 to crank arms 36. These. crank arms project rearwardly from a rock shaft 37 which is pivoted at its ends on bearing .screws 38 (see Fig. 9) carried by the base of the machine. A centrally disposed rearwardly projecting crank armj39 also projects from the rock shaft 37 and has a slot 40 in the rear end portion thereof. This slot receives a pin 41'which is carried by an upwardly and rearwardly projecting link 42, which latter is pivoted at its upper end to a forwardly projecting arm 43 of a dog rocker which is designated as a whole by the reference numeral 44. A The trunnion- like pivots 45 and 45 of this dog rocker are received at their ends in bearing blocks 46 by the bracket plate 48.

This universal and these latter are supported bearing openings in lugs 47 formed on abracketplate 48 supported on the top plate of the machine. Each bearing block 46 is held in place by. ascrew 49 received in a tapped opening in the associated lug 47 and bearing atits inner end against the associated bear-v ing block 46. A contractile spring 50 is connected at one end to the type bar segment and at its opposite end to the crank arm 39 to return theuniversal bar and the parts connected therewith to normal position. The dog rocker is also provided with a returning spring to return it and the link 42 to normal position. Thus a depending pin 51 is carried by the dog rocker and is connected to one end of a contractile spring 52; .Theopposite end of this spring is connected to a plate or arm 53 which is carried The dog rocker carries and 55. The loose dog 55 is pivoted at 56 on a rocking member, plate or carrier 57 which is pivoted by means of a headed, shouldered, pivot screw 58 on an upwardly the dog rocker. The tail piece 60 of the pivoted dog 54' is adapted to bear against the member 57, to limit the pivotal movement of the dog 54 in one direct-ion around its pivot 56. An expansion spring 61 bears at one end against the member 57 and at its two loose dogs 54 be seen that a contractile spring 62 is connected at one end to a in 63 which pros jects from the member 5 and is connected at its opposite end to a 'pin64 which projects rearwardly from the upright arm 59 of the dog rocker. The power of this spring 62 tends to turn the member 57 from right to left, as the parts appear in Fig. 4, around its pivot 58. The pivotal movement of the member 57 is limited by a screw stop 65 carried by the arm 59 and received in a slot or opening 66 formed in the body of the member 57. The ends of the slot 66 cotiperating with the stop pin 65 limit the pivotal movement of the dog carrying member 57 in opposite directions. Fig. 5 represents the parts as they appear, when in the normal position and from which will be-seen that a tooth of the escapement wheel normally engages the dog 54 and holds it, and the carrier 57 on which it is mounted, in the right-hand position against the power; of the spring 62. If a reverse movement be gingthe dog on "54 out of engagement with the tooth turns to normal position.

given to the escapement wheel at this time it will merely result in the rear faces of the teeth of the escapement wheel engaging the rear inclinedface of the feed dog 54, turnits pivot 56 against the ressure of the spring 61 as the teeth o the escapement wheel are successively brought into contact with the feed dog. The second feed dog 55 is '5. lugs 68 whic project fromv the upwardly extending arm 59 of the dog rocker. An expansion spring 69 is received at one end in an openin in the arm 59 and bears at its opposite en in a corresponding opening in the feed dog 55. The force of this spring is exerted to normally maintain the feed dog in i the position shown in Figs. 2 and 5. The tail piece vof this feed dog 55 extends downwardly from the pivot 67 and in the normalfpositions of the parts represented in Figs. 2 and 5, bears against an abutment 71 which is formed as a part of the rocker arm between the supporting lugs 68; The tail piececooperating with this abutment limits the movement of the dog 55 from right to left, as the parts are shown in Fig. 5. The extent of movement of each loose dog preferably corresponds to about halfof the full letter space movement of the carriage. The

operation of the escapement to afiord ajfull letter space moivermant is, therefore, to give a so-called half-and-half drop that is to say, a half letter-space drop of the carriage {at the downstroke of the key and a half letter-space drop of the carriage on the upward movement of the key. Thus when a full letter-space printing key 26 is depressed the cont-act screw 34? carried thereby, will engage the universal bar 34 and effect a rocking of the dog rockerthrough the intermediate connections 35, 37, 39- and 42. A

forward movement of the dog rocker thus produced is efiective to move the feed dog a (Fig. 2) of the escapement wheel which was engaged thereby and'to carry the loose dog 55 into the path of the second preceding tooth c of the escapement wheel, as will be underw'istood from an inspection of Fig. 2; A re lease of the dog 54 thus eiiected enablesthe spring 62 to turn the supporting member 57 together with the dog 54 which is carried thereby, from a position such as is shown in Fig. 5 to a position corresponding to that represented in Fig. 4. In this last mentioned position the dog 54 will be so located as to engage the next advancing tooth of the escapement wheel when the dog rocker re The depression of the finger key which eifected a release of the dog 54' in the manner described, also brought the loose dog 55 into the path of the second tooth 0 (Fig. 2) of the'escapement aswhcel from that engaged'by the dog 54.

pivoted at 67 between bearing The escapement wheel being thus released from control of the dog 54 advances under the power. of the spring drum. This advance continues until the tooth c on the wheel to the right of the .dog 55, as the parts appear in Fig. 2, engages the dog 55 and moves it against the pressure of its spring 69cuntil the dog isarrested through itsen gagement with a contact face 72 on the 11pright arm 59 of the dog rocker, as shown in Fig.4. This figure shows the parts as they are disposed at the termination of the downstroke of a so-called full letter-space key 26.

When pressure on this key is released the upri ht arm of the dog rocker moves rearwar 1y, thereby bringing the feed dog 54 i into the path of the tooth con the escapement wheel and disengaging the feed dog 55 from this tooth c. The power of the carriage spring, exerted through the escapement wheel, exerts its forcea-gainstthe dog 54 and returns it, together with its carrier 57 around the pivot 58 to normal position, as shown in Fig. 5.. The feed dog 55 having been released from engagement with the tooth c is likewise returned by its spring 69 to normal position, as shown inFig. 5. i The movement of the dog 54 with its carrier, 57 under the pressureof the escapement Wheel to the positionshown in Fig. 5is effective to provide a half letter space movement of the carriage which is effected at the upstroke of the key. It will be seen therefore that, under the conditions described, a half letter space drop of the carriage is afforded at the downstrokeof the key and a half letter. space drop of the carriage is afforded at the upstroke of the key, thereby providing a halfand-half drop to the. extent of a full letterspace ateach actuation of a 'full letterspace printing key 26' i a In the present construction I have pro vided means for controlling the escapement so asto afi'ord onlyga half letter space feed at each actuation ofcertain of the printing keys (designated by the reference numeral, 26) "instead of a full letter-space feed, as

hereinbefore described. Thus some of the characters occupy less widthwise space than others, such, for example, as the letter i. When a printing key 26" is actuated, which controls the ty eson which one of these characters is ormed, special controlling means are thrown into operation to provide for a letter space feed movement of the carriage of only, say, half the distance that is afforded by an actuationof the other or full letter-space keys 26. In order to accomplish this result I have provided an auxiliary universal bar 73, which extends beneath the series of key levers 25 in therear of the universal bar 34. The auxiliary universalbar is connected at its ends to upwardly and forwardly extending arms or links 74 which are pivoted on the pivot screws 38, which screws widthwise s ace sufiicient to co-act with only in Fig. 9. There are four i to turn freely on with the auxiliary universal that a depression of any of likewise constitute pivots for the rock shaft 37. The universal bar 73 is provided with one or more substantially Ushaped clips 75 which may be made of sheet metal and each of which is adapted to straddle and be held friction tight on the universal bar, as shown in Fig. 8. Each of these clips is provided with an upwardly extending contact portion or projection 76 which may be bent up from the body portion of the clip and occupies a one of the ey levers 25 and 25, as shown of these contact devices shown in Fig. 9 although this number may be varied as desired and the contact devices may be adjusted longitudinally of the auxiliary universa bar on which they are supported so as to bring the contact devices beneath different key levers if desired.- It will be seen from an inspection of Fig. 9 that the key levers 25' which do not cooperate with the contact devices are free to be to a considerable extent without the key levers into engagement bar. However, those key levers 25 which co-act with the contact devices 76 have no such lost motion, since the space between them and the auxiliary universal bar is occupied by the contact devices. It will be understood, therefore,- these key levers 25 will immediately effect a corresponding movement of the auxiliary universal ar through the engagement of any of such key levers with the associated projection or contact device 76.

The auxiliary universal bar carries a rearwardly projecting arm 77 to which an upwardly extending link 7 8 is pivoted. The upper end of this link is pivoted to a socalled controlling member or wedging device which is designated as a whole by the reference numeral 79. This device is provided with a forwardly projecting arm 80 to which the link 78 is connected and with an upwardly extending arm 81 provided with an inclined face or wedging portion 82. The controlling device or member 79 is pivoted the trunnion-like projection or pivot 45 of the dog rocker, and to receive a pivotal movement on the axis of the dog rocker. The controlling device 79 depressed bringing b'earsat one side against the upright arm 59 of the dog rocker and a sleeve or collar 83 bears against the opposite side of the controlling member to hold it against movement longitudinally of the trunnion 45 in one direction, the arm 59 of the dog rocker preventing a movement of the controlling member in the opposite direction. The collar 83 is fixed to the trunnion 45" by a set screw 84 received in a tapped opening in the collar and bearing at its inner end against the trunnion 45.

The controlling member 7 9 has a pivotal movement with and independently of the dog rocker.

' ing of the loose dog into engagement with the contact face 72 is effected by a movement of the controlling member or wedge between the tail piece of the dog and the arm 59, as shown in Fig. 7. The loose dog being thus positioned and held by the wedging device no longer acts as a loose dog but 18 maintained fixed against movement around its pivot 67, and temporarily constitutes in ef-' feet a fixed dog. The construction and arrangement of the parts are such that a depression of one of printing keys 26* to the full line position shown in Fig. 6, is effective to actuate the auxiliary universal bar 73 to turn the controlling device 79 from its normal position shown in Fig. 1 to the position shown in Fig. 6, where the wedge has effected a movement of the dog 55 from the normal position shown in Fig. 5 to that represented in Fig.

.7. This movement of the dog 55 carries it back its full extent of movement, or approximately a distance between two teeth of the escapement wheel, so that it is adapted to co-act with the next advancing tooth b (Fig. 7 of the escapement wheel on the full depression of the printing key 26 without afiording a drop of the carriage for approximately a half letter space distance, as previously described. This will be understood from an inspection of Fig. 7 which shows the positions of the parts after the dog 55 has been cammed against the dog rocker to take up the lost motion that the dog ordinarily has, thus preventing the partial letter space drop of the carriage that is ordinarily effected by such lost motion. It should be understood that the depression of the printing key 26 to the full line position shown in Fig. 6 is efiective as hereinbefore explained to actuate the controlling device and move the dog 55 to the Fig. 7 position, and that this movement of the dog is effected before motion is transmitted from the same key to the universal bar 34. It will be seen, therefore, that the dog 55 is moved to the Fig. 7 position before the dog rocker has received a forward rocking movement to disengage the normally engaged feed dog 54 from the escapement wheel. When, however, the movement of the feed dog 55 around its pivot 67 is completed the universal bar 34: will be taken up, and the dog rocker will receive a pivotal movement to disengage the dog at and bring the dog 55 the so-called half space into the path of the next advancing tooth b (Fig. 7) on the escapement wheel without, however, aifordinga drop, orany material extent of drop, to' the carriage. It follows, therefore, that there is no. feedmovement of the carriage during the downstroke of the key under the conditions mentioned. It

i should be understood that after the universal bar 73 has been taken up in the manner described, the controlling device 79moves with the dog rocker, and on the same pivotal center as the dog rocker, and'is thus main- ;tained wedged between the tail of the dog and the upright arm 59 of the dog rocker. The downstroke of'the key which was effective to interpose the dog 55 in the path of the next advancing tooth b of the escapement wheel'was also effective to release the dog 54, and the spring 62 then moved the.

member 57 and thus advanced the do 54 to a position corresponding to that in icated in Fig. 4. It follows, therefore, that when pressure is released on the depressed finger key the various springs hereinbefore referred to will return the type action, universal bar 34, and dog rocker to normal position and the dog 54 will be again engaged by the next advancing tooth of the escapement wheel, whiclilatter when released by thedog 55 will force the dog 54 and its car .rier 57 against the ull of the spring 62 to the position shown in Fig. 5, thus affording half of a full letter-spacedrop of the carriage through a movement of the dog 54 with its carrier 57.

A separate returning spring 85 is connected to return the universal bar 73 and the parts controlled thereby to normal position. Thus this spring85 is connected at one end to a pin 86 which projects from the base of the machine, said sprmg being connected at its opposite end, to an arm 87 which is formed as a part of and projects forwardly from one of the arms 74. The force of this spring is exerted to elevate the universal bar 73 and return the controlling device 79 to its normal osition, shown in Fig. l, where it is with rawn from between the tail 70 of the dog 55 and the body portion of the dog rocker. The dog 55 being thus freed from the wedging device is returned bythe spring 69 to its normal position, shown in Fig. 5.

It'will be understood that when the so its upward movement with the returning key lever 25* under the force of the spring 85.

This independent movement of the universal bar'73 effective to turn the controlling device 79 on its pivotal center independently of the dog rocker which has been arrested. It is thisindependent movement of the controlling device thatenables the feed dog 55 to. be returned to normal position around its pivot 67. j i Itshould be understood from the foregoing description that during the operation of the full space printing keys 26 the universal bar 73 will not be taken up and actuated, or will not be actuated to a suflicient extent to int'erpose the wedging or controlling device 79 between the tail of the dog 55 and the do rocker; butthat the controlling device anc l dog rocker will be moved together while the controlling device remains in the inoperative position. When, however, a so-called half letter-space printing key 26 is depressed the associated contact device or projection 76 causes the universal bar 73 to be actuated first, thereby wedging the dog 55 against the dog. rockerand taking up the lost motion that is ordinarily provided for this dog and causing it to act as a fixed dog, 'so that a feed movement of thecarriagewill at this time beelfected onlyjthrough the movement of the dog 54 with its carrier 57 around the pivot 58. It will be seen,' therefore, that during the actuation of each so-called full letter-space key 26 the wedging device is not thrown nto operation, but on the other hand each time a so-called half letter-space print ing key'26 is actuated the wedging device will be thrown into operation to rovide for a half. letter-space only at eac printing operation. i

The rocking movement of the dog rocker is limited by a fixed stop or abutment 88 which projects rearwardly from the bracket plate 48. Screw stops .89 and 90 are carried by the dog rocker and co-actwith the fixed stop 88. The screw 89 passes through a tapped opening in the upright arm59 of the dog rocker and is locked in its adjusted positionby a lock nut 91. The forward end of this screw co-acts with-the rear end of the fixed stop 88 to limit the forward movement of the dog rocker onthe depression of a key. The screw stop 90 is received in and.

extends through a tapped opening in the arm 43 of the dog. rocker and the upper end of said screw stop co-acts with the fixed stop '88 to limit the rearward movement ofthe dog rocker. lock nut 92 co-acts with the screw stop 9 to'hold it against accidental displacement from its adjusted position.

. From the foregoing description it will be understood that while all of the keylevers are operative to actuate the dog rocker, cer tain only of thekey levers are operative to move the controlling device 79 independently of the dog rocker; that at=each actuation of the dog under control of a half lettar-space key 26*, and after a printing operation has been effected by suchkey, the dog 55 will return to the normal position, shown in Figs. 2 and 5, where it is ready to act as a loose dog and afford a full letter-space movement of the carriage at the next actuation of a full letter-space key 26; thatthere being comparatively few keys 26, which control the escapement to give a short or half letterspace feed of the carriage, the escapement operates under normal conditions by the control of the full space keys 26 to afford a full letter-space feed, whereas when one of the so-called half letter-space keys 26 is depressed, the universal bar 73 and the controlling device 97 will be actuated to provide an abnormal operation to afford only a half letterspace feed of the carriage. I

While I have referred herein to variation in the from a half to a full letter space it should be understood that these terms may be regarded merely as relative terms, and that the escapement may be arranged to afiord difierent ex tents of feed, and different extents of variation may be provided.

Various changes may be made without departing from the spirit and scope of my invention.

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

1. In a typewriting machine, the combination of a power driven carriage; printing keys; and variable feed carriage escapementmechanism including a feed dog operative at one time as a loose dog and at another time as a fixed dog, and controlling means controlled by certain only of said printing keys for controlling said feed dog to operate as a fixed dog and controlled by certain other of the printing keys to control said dog to operate as a loose dog.

2. In a typewriting machine, the combination of'a power driven carriage; printing keys; and variable feed carriage escapement mechanism including a normally loose feed dog operative at one time as a loose dog and at another time as a fixed dog, and controlling means operative by certain only of said printing keys for moving said dog and taking up the movement that it normally has as a loose dog and causing it to operate as a fixed dog, said controlling means being operative by certain other of said keys to control said dog to operate as a loose dog.

3. In a typewriting machine, the combination of a power driven carriage, an escapement rack, a dog rocker, a dog carried thereby, a second normally loose dog also carried by the dog rocker, printing keys, means controlled by said keys for controlling the movement of said dog rocker, and independent means controlled by certain only of said keys for rendering said second normally loose dog operative as a fixed dog.

a. In atypewritlng machine, the combination of a power driven carriage, an escapeextent of feed of the carriage 7 tion of a power driven carriage; keys; and variable 'Eeed carriage escapement :mechanism including a normally dog operated at one time as a loose at another time as a fixed dog, means operative by as a loose dog and causing position after each ment rack, a dog rocker,

ment rack, a dog rocker, a dog carried thereby, a second normally loose dogalso carried by said rocker, printin keys, means controlled by said keys or controlling the movement of said dog rocker, and independent means controlled by certain only of said keys for taking up the movement that said dog normally has as a loose dog and causing it to operate as a fixed dog.

5. In a typewriting machine, the combina tion of a power driven carriage; printing keys; and variable teed carriage escapement mechanism including a feed dog operative at one time as a loose dog and at another time as a fixed dog, controlling means controlled by certain only of said printing keys for controlling said feed dog to operate as a fixed dog and by certain other of the printing keys to operate as a loose dog, and

means for returning said controlling means to normal position after each printing operation to enable said feed dog to'operate as a loose dog.

6. In a typewriting machine, the combinaprinting loose feed dog and controlling certain only of said printing keys for moving said dog and taking up the movement that it normally has it to operate as a fixed dog and operative by certain other of said keys as a loose dog, and means for returning said controlling means to normal printing operation to enable the normally loose dog to return to the position where it is operative to act as such.

7. In a typewriting machine, the combination of a power driven carriage, an escapea feed dog carried thereby, a second normally loose dog also carried by the rocker, printing keys, means controlled by said keys for controlling the movement of said dog rocker, independent means controlled by certain only of said keys for rendering said second normally loose dog operative as a fixed dog, and means for returning said independent means to normal position after each printing operation to enable said normally loose dog to act as such.

8. In a typewriting machine, the combination of a power driven carnage; printing Elli ill) lit] keys; and variable feed carriage escapement mechanism comprising an escapementnoenosa keys; and variable teed carriage escapement mechanism comprising an escapement rack, two normally loose dogs which cooperate with said rack, each dog normally affording 5 a drop of the carriage, and controlling I means oontrolledby certain only of said printing keys to take up the movement of onerof said dogs and to cause it to act as a fixed dog, thereby affording a drop of the carriage only through the other dog.

10. In a typewriting machine, the combi nation of a power driven carriage; printing keys; and variable feed carriage escape ment mechanism comprising an escapement rack, two normally loose dogs which cooperate Withsaid rack; each dog when operating as a loose dog aiiording substantially the same extent of drop of the carriage, and

a controlling means controlled by certain only 20 movement of one of said dogs and causing it to act as a fixed dog, thereby affording at of said printing keys 'for taking up the controllingmeans to normal position after 3 each printing operation to enable both dogs to operate as-loose dogs. p

12. In a typewriting machine, the combination of apower driven carriage; printing keys; and variable feed carriage escapement mechanism comprising an escapement rack, two normally loose dogs which cooperate with said rack, each dog normally affording a drop of the carriage, controlling means controlled by certain only of said printing keys to take up the movement of a one of said dogs and to cause it to act as a fixed dog, thereby affording adrop of the carriage only through the other dog, and means for returning said controlling means to normal position after each printing operation to enable a drop of the carriage to be eflected through both dogs i 13. In a typewriting machine, the combination of a powerdriven carriage; printing rack, two normally loose dogs which 00* operatewith said rack, each dog when oper- B0 the same extent of drop of the carriage, conating as a loose dog affording substantially trolling means controlled by certain only of said printing keys for taking up the movement of oneof said dogs andcausing it to act as a fixed dog, thereby afiording at such time only substantially one half the extent of feed that thecarriage receiveswhen both dogs operate as loose dogs, and means for returning said controlling means to normal position after each printing operation to en able both dogs to operate as loose dogs.

14. In a typewriting machine, the combinat on'of a power ClIlVGIl carriage; printing keys; and variable feed carriage escapement mechanism comprising a dog rocker,

a feed dog carried thereby, said feed dog i being operative at one time as a loose dog and at another time as'a fixed dog, a umversal bar operative by any of said printing keys and. operatively connected to said dog rocker to actuate it, a second universalbar operative by certain only of saidprinting keys, and means operative by said second universal bar for controlling said feed dog to operate as a fixed dog.

15. In a typewritingmachine, the combination of a power driven carriage; printing keys and variable feed carriage escapement mechanism comprising a dog rocker, a normally loose feed .dog carried'thereby, said feed dogbeing operativeat one time as a loose dog and at another time as a fixed dog, a universal bar operativeby any of said printing keys and operatively connected to said dog rocker to actuate it, a

second universal bar operative by certain only oi said printing keys, and controlling means controlled by said second universal bar for moving said dog to take up the movement that it normally has as aloose dog,

16. In a typewriting machine, the combination of a power driven carriage; print ingkeys; and variablefeed carriage escapement mechanism comprising a dog rocker, two normally loose feed dogs carried thereby, a universal bar operative by any of said printing keys and operatively connected to said dog rockerltoactuate it; a second universal bar operative by certain only of said printing keys, and controlling means operated by said second universal bar to control one of said dogs to operate as a fixed dog.

' 17. In a typewrit-ing machine, the com binatlon of a power driven carriage; PI'lIll'fi ing keys; and variable teed carriage escape- Inent mechanism comprising a dog rocker, two normally loose feed dogs carried thereby. each dog when operating as a loose dog afiording substantially the same extent of drop of the carriage,a universal bar operative by any of said printing keys and oper atively connected to said dog rocker to actuate it, a second universal bar operative by certain only of said printing keys, and controlling means operated by saidsecond nni versal bar for taking up themovement of one of said dogs and causingit to act as a fixed dog, thereby all'ording a drop of the carriage only through the other dog.

Ifm

mil

drop of the carriage, a universal bar oper;

. ative by any of said printing keys and operatively connected to said dog rocker to actuate it, a second universal bar operative by certain only of said print-ing keys, and controlling means operated by said second universal bar for taking up the movement of one of said dogs and causing it to act as a. fixed dog, thereby affording at such time onl substantially one half the extent of feed that the'carriage receives when both dogs operate as loose dogs.

19. In a typewriting machine, the combination of a power driven carriage; printing keys; and variable feed carriage escapement mechanism therefor comprising a dog rocker, a normally loose dog carried thereby and movable independently thereof, said dog operating at one time as a fixed dog and at another time as a loose dog, means controlled by said printing keys for actuating said dog rocker, and a wedging device controlled by certain only of said printing keys and cooperative with said dog to. hold it against independent movement so as to cause the dog to act as a fixed dog.

20. In a typewriting machine, the combination of a power driven carriage; print ing keys; and variable feed carriage escapement mechanism therefor comprising a dog rocker, a normally loose dog carried thereby and movable independently thereof, said dog operating at one time as a fixed dog and at another time as a loose dog, means controlled by said printing keys for actuating said dog rocker, a wedging device movable with and independently of said dog rocker,

and means controlled by certain only of. said printing keys for controlling the indeof said wedging device pendent movement to throw it into cooperation with said dogto effect a movement thereof independently of the dog rocker and thereafter hold the dog against independent movement so as to cause it to act as a fixed dog. I

21. In a typewriting machine, the combination of a power driven carriage; printing keys; and variable feed carriage escape ment mechanism therefor comprising a dog rocker, a pair of normally loose dogs carried thereby and normally spaced apart, means controlled by said printing keys for actuating said dog rocker, and means controlled by certain only of said printing keys for moving one of said dogs toward the other to reduce the space between the dogs.

22. In a typewriting machine, the combiloose feed dogs carried therenation of a power driven carriage; printing keys; and variable feed carriage. escapement mechanism therefor comprising a dog rocker, a pair of normally loose dogs carried thereby and normally spaced apart, means controlled by said printing keys for actuating said dog rocker, a wedgin device movable with and independently 0 said dog rocker and operative by such independent movement on one of said dogs to move it toward the other, and means controlled by certain only of said printing keys for effecting an independent movement of said wedging device.

23. In a typewriting machine, the combination of a power driven carriage; printing keys; and variable feed carriage escapement mechanism therefor comprising a dog rocker, a pair of normally loosedogs carried thereby and normally spaced apart, a universal barcontrolled by said printing keys and operatively connected to said dog rocker to actuate it, a wedging device movable with and independently of said dog rocker and operative by such independent movement to hold one of the normally loose dogs to cause it to operate as a fixed dog, a second universal bar controlled by certain only of said printing keys, and intermediate connections between said second universal bar and said wedging device to control the independent movement of the latter.

24. In a typewriting machine, the combination of a power driven carriage; printing keys; and variable feed carriage escapement mechanism comprising a universal bar the actuation of which determines when a variation in the normal extent of feed is to be aiforded, actuating devices controlled by said printing keys, and adjustable contact devices interposed between said actuating devices and said universal bar and an adjustment of which contact devices enables one or another of the keys to actuate said universal bar through an interposed contact device.

25. In a typewriting machine, the combination of a power driven carriage; printing keys; and variable feed carriage escapement mechanism comprising a universal bar the actuation of which determines when a variation in the normal extent of feed is to be afforded, actuating devices controlled by I said printing keys, and contact devices carried by and 21(1111Stflbl8 along said universal bar to bring each of said devices into cooperative relation with one or another of said key controlled actuating devices.

26. In a typewriting machine, the combination of a power driven carriage; printing keys-,and variable feed carriage escapement mechanism comprising a universal bar the actuation of which determines when a variation in the normal extent of feed'is to be afforded, actuating devices controlled by said printing. keys, substantially U-shaped clips which straddle the universal bar and are adjustable to ditferent positions the same, carried by each of said clipsfor cooperation along y with one of said key actuated devices, the

adjustment of the clips along the universal bar determining with which key controlled actuating devices the contact devices on the clips shall cooperate.

27. In a typewriting machine, the combination of printing key levers; a power driven carriage; and variable feed carriage escapement mechanism aflording different extents of feed depending on which of the key levers are actuated, said escapement mechanism comprising auniversal bar controlled by any of said key levers, escapement I devices controlled thereby,asecond universal bar controlled by certain only of said key levers controlling means actuated by said second universal bar, and contact devices carried by and adjustable along said second universal bar and with eachof which a key lever is adapted to cooperate, the adjustment of said contact devices determining and a projecting contact device which of the key levers shall cooperate therewith.

28. In a typewriting machine, the comblnation of a power driven carriage; ing keys; and variable feed carriage escapement mechanism comprising a dog rocker, a feed dog carried thereby, said feed dog being operative, at one time as a loose print- 1 dog and at anothertime as a fixed dog, a

universal bar operative by any of said printing keys and operatively connected to said a dog rocker to actuate it, a second universal bar operative by certain only of said printing keys, and controlling means which determines whether the said dog shall be operative as a fixed dog or as a loose dog,

said controlling means being'under control of saidsecond universal bar. a

Signed in the borough of Manhattan, city of New York, in the county of New York and State of New York, this lfithday of Dec. A. D. 1912.

ARTHUR W. SMITH.

Witnesses:

CHARLES E. SMITH, M. F. I-IANNWEBER.

Images