US872552A - Type-writing machine. - Google Patents

Description

PATENTED DEC. 3l 1907.

. E. E. BARNEY. TYPE vWRITING MACHINE.

APPLICATION FILED APR. 25. 190e.

2 SHEETS-SHEET 1.

1-5 TTDRNEY y Nm 872,552. PAIENTBD DEC. s, 19o?.

ANEY. TYPE WRITING MACHINE.

"APPLICATION FILED APE. 25. 1906.

' 2 SHEETS-SHEET 2.

I-ZIGIO.4 FIGQII s 52 E ll 63 5g 59 6565 WITNESSEE: I I lNvENTmR':

1415 ATTDRNEY v EDWN E. BARNEY, OF SYRAOUSE,

COMPANY, OF SYRAOUSE,

NEW YORK, ASSIGNOR TO THE MONARCH TYPEWRITER NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Dec. e, 1507.

Application iiled April Z5. 19.06. Serial No. 313.6(15.

T o all whom 'it may concern:

Be it known that I, EDWIN E. BARNEY, citizen of the United States, and resident of Syracuse, in the county of Onondaga and State. of New York, have invented certain new and useful lImprovements in Type- Writing Machines, of which the following is a specification.

mechanism housed within said box.

'feed as desired.

vide a carriage My Ainvention relates more especially to the carriage feeding mechanism of typewriting machines and has for one of its objects to provide-improved devices for converting .the carriage feeding mechanism, by

e which 'termi mean' alternating said mechanism so as to cause a letter space feeding movement of the carriage onI the depression .instead of on the return movement of a printin `or space key, and vice versa,'or for provi ing either an ordinary or reverse Another object of my invention is to profeeding mechanism of the class specified with a back stop of the general character of that forming the subjectmatter ofV the patent. to Gabrielson No. 717,837, dated January 6th, 1903.

To the above and other ends the invention consists in the features of construction,

combinations of devices and arrangements lever. Fig. 3 is an enlarged. rear elevation of the dog carrier and its associate parts, which parts are broken away for the sake of clearness, said view also showing the escapement wheel and ratchet box associated therewith, said ratchet box being shown in section so as to disclose the pawl and ratchet is a right hand. sido elevation of thc dog rocker and associato parts as shown in Fig. 3. Fig. 5 is a view corresponding with Fig. e butI showing the shift member or levcr in a different relation from that shown in said Fig. .4. Fig. o is a i'ragmcntar)r rear vicw of the upper part of thc dog rwkcr as shown in Fie. 5 )art o'iI ihc. cscaiwlncnt whlcl also being shown.

position..

Fig. 4-

v mentary rear. elevation of the combined normally enga ed dog and escapernent wheel stop or bac stop, together with fthe, lower portion of the esca ement wheel, the escapement wheel stop being shown in arresting Fis. 8 to 13, inclusive', are diagrammatic views illustrating various relations between the escapernent dogs and the teeth of the escapernent wheel.

My invention 4is illustratedas applied to a' Monarch typewriter, Abut it is to be understood that said invention may be adapted to other forms of writing machines.

In the drawings, the main frame of the machine is shown as comprisin@r a base 1, corner posts 2 and a top late`3. fulcrumed on'a fu rear of the base, each key-lever being provided with a restoring spri 4a. Pivoted at 6 to each key lever is a subeverf7 the lower portion whereof is slotted at 8 to cooperate with a fixed abutment 9 and the upper end whereof is connected by a link 10 with a type bar 11 which is one of a series of typel bars mounted on the segmental type bar sup-*v port 12. Each type bar y'may be pivoted ii" an individual hanger 13 secured by a sere 14 to the support 12 and may be provided with a restoring spring 15. The type ends of the type bars normally contact with a segmental type rest 16 and the types of said type bars are adapted to cooperate with the front face of a cylindrical platen 17 mounted on an axle 18, said axle being journaled in a platen frame, carrier or carriage. Said platen frame comprises side bars 19 (one yof which only is shown) and a rear bar 20 from the ends of which said side bars extend horizontally and forwardly. The top and bottom faces of the rear b ar are formed with lon-v gitudinal grooves which cooperate with antifriction balls 21, said balls also cooperating with groo vcs formed iii guide rails 22 and23 fixed to standards 24 rising from the top plate.

' A carriage feed rack 25 is secured to arms 2o pivoted at 27 in the side bars 19, only one oi' said arms 26 and pivots 27 being shown. Saidi'ccd rack 25 normally meshes with a fccd pinion 28 [ixcd at `the forward or front end oi' a short horizontal shaft 29 journaled in a bracket 30 [ixed to the top plate of the machinc. A rack member in the form of a 'circular cscapcmcnt rack or cscapemcnt whccl 31 is loosely mounted on the rear ol' thc Fig. r7 is an enlarged frag- 1 shal't 2.9 and has secured to its rear facea 2QKey levers 4` are crum plate 5 fixed at the f ears or lugs 4S, 49 and ratchet wheel 32 (Fig. 3). teeth of the ratchet wheel 32 33 pivotally mounted at 34 in a cylindrical box-like housing 35 which is provided with a central boss 35a througli'whicli pass screws 36, said screws abutting, against the rear-end portion of the shaftu29, and serving to secure the housing 35 in a fixed relationwith said shaft. Leaf springs 37 are secured by rivets 38 to the inner wall of the housing 35 and said leaf springs tend constantly topress the pawls 33 into engagement with the ratchet wheel 32. y a

l/Vhen the carriage is fed in letter space direction it will be understood that the engagement of. the .pawls 33 with the ratchet wheel 32 will cause the escapement wheel 31 to rol tate with the shaft 29, but when the carriage is restored from left to right across the top plate to begin a new line, the pawls 33 are' adapted to slide over the teeth of the ratchet 'l Engaging the E are spring pawls i wheel 32 so that rotation of the shaft 29 may not affect the escapement wheel 31. It will,

of course,be further understood that if, during the movement. of the carriage in either direction, the ieed rack 26 is disengaged or separated from the feed pinion 2S, neither respectivelyT housed in depressions 57a the shaft 29 nor escapement wheel 31 will be affected. The periphery of the escapeinent l wheel 31 is provided with teeth 39 of suitable l form. The arrangement and construction of the parts hereiiibefore described are esseni tially the saine as those embodied in the l Monarch machine and it is thought unnecessary to explain them in greater detail. i A vibratory dog carrier or rocker comprising a rock shaft 40, a vertically disposed arm 4l and a horizontally disposed arm 42, l is pivotally connected at the ends of the rock shaft 4() with ears 43 extending rearwardly l from a bracket 44 depending from the top Il plate. The dogl rocker is provided with a i suitable restoring spring 45 and the arm 4l l carries an adjustable screw stop 46 which is i adapted to contact with the bracket 44 to l limit the forward movement of the rocker, F while the arm 42 is provided with an adjustable screw stop 47 which is adapted to conil tact with the bottoni of the. bracket 44 to limit the rearward i'novement of said rocker. Normally the restoring spring 35 maintains the dog rocker in the position illustrated in Fig. 1 with the limiting stop 47 in contact i with the bracket 44. l Near its upper end the vertically disposed arm 41 of the dog rocker is provided with 5() which, viewed from 5 the'rear oi the machine, project tcwards the right from the right-hand face of the arm 4l. The ears are perforated to receive a short rod 5l which serves as a pivot for l'wo dog members 52 and 53, the forward dog :')Zbeivng arranged between the ears 4N and -l.)'an\d the i rear dog 53 being arranged between the ears l l and 5i). The inner faces of lhe dogs i above their pivots are provided with laterally projecting studs or pins 54 and 55 about which are coiled light wire springs 56-aii57 ig. 3) formed in the arm 4l of the dog rocker. Said springs tend constantly to press the upper arms of the dogs away from the neighboring face of the dog rocker and to press the lower arms or tails of said dogs towards said neighboring face. The forward dog 52 has an arm 58 projecting lettward from near its upper endl as viewed. from the rear of the .machine (Figs. 3 and 7), said arm 5S termina'ting in a rearwardly'projecting stop portion 59 which is adapt-ed to coperate with the backs of the teeth 39 of the escapementwheel 31 to prevent backward rotation of the latter.

In order to controlthe dogs 52 and 53 so as to cause them to cooperate with the escapenient wheel 3] to permit the carriage to feed either on the down stroke of a printing key or 0n tlie'return stroke thereof, l provide a shiftable stop member which, as herein shown, is in the form of a lever designated as a whole by the reference numeral 61")Y and illustrated in detail in Fig. 2. The shiftable stop member or lever 6() is preferably made ofv sheetI metal and is provided with an opening 6] which reeeives means for securing said leverin position. The lower arm of the shift lever terminates in an engaging' portion 62 and the. upper arm of said lever is provided with a stop in the form of a short side port-ion or lateral arm 63 and has a longer oppositely disposed side portieri 64. The stop portieri 63 lies in the plane of the body of ihe lever and has its end beveled as indicated at 65 while the portion 64 is angled j or bent best shown in Fig- 2, so as to form a U-shaped or hook-like part cr fork, the end whereof is beveled as indicated at 66. The shift lever 60 is mounted on the rear dog 53, being secured thereto below the pivot rod 51, by means ol a headed screw 67 which passes through the opening 6] in the lever 6() and screws into a threaded opening in the lower arm or tail of the dog 53. The screw 67 serves, when tightened, to maintain the shift 5 lever in a lixed relationwith the dog 53 and when loosened, said screw serves as a fulcruin about vwhich said lever may be given a rotary movement to bring it to one or another of its working positions, one of these Working positions being best shown in Figs. 3 and 4 and the other working Figs. 5 and 6.

ln Figs.. 3 and' 4 the shift lever is shown with its upper arm swung forward so that the U-shaped orhook portion 64 at the top thereof iigages the sides of the rear dog 53, the metal ofihe shift lever preferably being resiliezn` so lhal Athe sides of thediook or forked portion exert friction enti/hev dog 53. This rear doe as shown clear-l)r iilillfig. 3, has

position in an of-set or lateral portion 53a which joins the tooth-like or working part of the dog with the body portion thereof, and the sides of the U-shaped portion 64 of the shift lever embrace o r engage the rear dog at the ends of this lateral portion 53a. When the shift lever is in this osition the si'de portion or stop 63 thereof hes in the path of the forward dog 52 as best shown in Figs.` 1 and 4. In order to shift the lever 60 to its other working positionv the screw 67 may be loosened and the lever may be swung about the shank ofsaid screw as a pivot into the osition invdicated in Figs. 5 and 6 in whic it will be seen-that the U-shaped portion 64 has been swung away from the rear dog and the stop portion 63 of the lever has been swung out of the path of the forward dog, while the engaging portion 62 at the lower arm of the lever is in frictional engagement with the end of a in or abutment 68 which projects from the side of the dog rocker arm 41. As seen in Fig. 1, the forward end of the arm 42 of the dog rocker is connected by a link 69 with afi arm 70 of a universal bar frame, said universal bar frame comprising a rock shaftjl pivoted at its ends in the sides of the vbase and a universal bar 72 which extends from side to side of the machine beneath the series of key levers. The construction is such that the universal bar is constantly or at all times connected with the dog carrier and the dog members thereon.

Depending from the platen frame or carriage is a stud 73 which is connected by a strap or band 74 with a spring drum 75 of suitable construction, said spring drum containing a carriage main spring which tends constantly to draw the carriage andA platen leftward across the top plateof the machine.

As hereinbefore stated the dog rocker is normally maintained in the position indicated in Fig. 1, from an inspection of which -it will be noted that the forward dog 52 isl normally engaged with one of the teeth 39 of the escapement wheel 31. Fig. 3 also shows the parts positioned as they appear in l? ig. 1 and said positions are further diagrarmnatically illustrated in Fig. 8 of the."drawings,

wherein the particular toothof the escapement wheel with which the dog 52 is engaged `1s`des1gnatedfor descriptive lpurposes by the referencecharacter 39a an( the next succeedi'ng't'ooth by the reference character 39". When the shift lever is positioned as shown in .these figures, that is, Figs. 1, 3 and 8,V and also in Fig. 4, it causes a letter space feeding movement of the carriage to take place upon the downstroke (ir-depression of one of the printing keys or of the space key; in other words, it provides what is commonly called areverse feed or speed escapement, operating in a manner. now to be described.

It will be understoodk that the main spring swung to the right (as viewed in Fig. 8) about the rockerI arm, and with its lower end or tends to turn the rack member or escapement wheel 31 in tne direction of the arrow in Fig. 3 and is su'llicient to overcome the force of the dog spring 56 of the normally engaged dog 52, compressing said spring and forcing the upper arm of said dog into con'- tact with the side of the rocker arm 41 as shown in Figs.. 3 and 8. From an inspection of the former figure it is apparent that in this y position of the d og 52 the bac-k stop 59 is out 75 of the path of the teeth 39 of the escapcment wheel. Vhen any key lever 4 is adequately depressed the type bar associated with the depressed key lever is caused tov swing upwardly and rearwardly to cooperate with the platen in aV known manner and at the'same time said key lever contacting with the universal bar l72 will swing the latter downwardly about its pivots causing a downward movement of the link 69 and swinging the dog rocker forwardly from the osition indicated in Figs. 1 and '8 until'the imiting stop 46 contacts 'with the rear face of the bracket 44. `As the dog rocker moves forwardly the normally engaged or forward dog 52 is swung 90 forwardly, in the direction of the arrow in` Fig. 8, out of contact with the tooth 39a of the escapementwheel. AS-soon as the dog 52-is clear of the tooth 39a said dog will be its pivot 51 by its s ring 56. At the beginning of the forwar movement ofthe dog rocker the rear dog 53 is maintained at the limit of its movement away from the face of tail in contact with the face of'the rocker arm (see Fig. 3) by means of the dog spring Y 57. This initial position of the rear dog is indicated in Figs. 3 and 8 .and from an inspection thereof it will be noted that when the dog rocker is swung forwardly on the depression or down stroke of a vprinting kmey or the space key the dog 53 will eriter the escapcment wheel between the teeth 39a and 39' thereof. Consequently as soon as the dog 52 has cleared the tooth 39 the escapement whepl will be turned iii the direction of lthe arrow in Fig. 3 by the carriage main spring and the tooth 39 on said escapcment wheel w'ill be brought into engagement with 115 the dog 53 and said dog will be forced to the left against its spring 57 until the side of the U-shapcd portion 64 of the shil'l lever (3() engages witir the side of thc dog rocker arm 4l, thereby causing a letter space 'feed move- 120 ment ol' the carriage at the down stroke of the key. As the rear dog is swung to the left it will carry with it the shift lever 6() and the stop portion 63 of said lever engages the forward dog 52 to swing the latter to the left 125 about its pivot, overcoming the dog spring 56 and forcing the dog 52 into engagement with the side of the rocker arm 41.

The parts at the completion of the key depression will be in the positions illustrated in v Fig. t). From an inspection of this iigun it will be seen that the engaging faees of the two dogs 5L? and 53 are so arranged that there is'a slight drop from the rear dog on to' the front one to prevent edgewise. engagement when wear takes plaee. When the kegv lever is released, the type. actuating mechanism will be restored to normal position in a known manner and the dog rot-.ker will be foreed rearwardly or in the direction of the arrow in Fig. E) b v its restoring spring 45 from the position shown in Fig. 9 to that shown in Fig. 1t). As the dog rocker swings rearwardly the dog 53 will he disengaged from the tooth 139D of the eseapement wheel and as soon as disengaged will be swung rightwardlv (as viewed in Fig. 9) away from the dog rot-,lier bythe dog spring 57. Before the disengagement of the dog53 takes plat-e, 'however7 the forward dog 52 engages with the tooth 39" of the eseapement wheel :1nd prevents rotary movement of said escapement wheel.

From a comparison of Figs. lt) and S it will be noted that the parts eorxespond in relative arrangement, save that the engaged or active tooth of the eseapement wheel in Fig. l() is the next sueeeeuing one to the engaged tooth in Fig. N. lt. will he understood, therefore, that during the. operation of the aetnated he)V lever a letter spare feeding movement has oeeurred during the. depression of said key lever and that on the return movement of said lever no movement of the carriage takes plare, thus all'ording a "reverse feed. This operation ofthe 'parts may be -repeated as often as desired. I

When the end of the line is reaehed and the carriage is restored from left to right to begin a new line of writing the eseapement wheel will be relieved from the pull of the main spring andif not. prevented might turn too far in reverse direetion (indieated b v the ar- Yrowin Fig. 7) because ol" the frirtion of the pawls on the ratrhet Ill. yl`his turning is assisted initially b v the spring 56 of the engaged dog. As soon as the movement of the eseapement wheel in the reverse diret-tion begins, the forward dog 52 which7 it will'be reealled, is in engagement. with said escapement wheel, will be foreed awa)Y from the face of the dog roelter b v the dog spring 56 and the back stop 59 enrried by said dog will be swung up\\'ardl}r and rightwardly (as viewed in Fig. 3) about the pivot 5l of the dog into position to engage with the back of the tooth next in front of the engaged or active tooth of the eseapement wheel. The backs of the eseapement wheel teeth are out on an are struck from -the center 51 about whieh the back stop 59 swings so that said back stop may ell'eet an easy entrance into the path of the teeth of the escapement wheel. A vervslight reverse movement of the escape-ment wheel is necessary to ln'ing,

direction of the arrow in Fig. 3 and will force the dog 52 back against the dog rocker and will swing the back stop 59 down out of the path of the escapement wheel teeth, restoring the parts to the position shown in Fig. 3. ln order to convert the escapement, that is, in order to change. the character of feed from the reverse feed or speed escapement in which the carriage is fed a letter spacev distance at each key depression and to so arrange the parts as to give the ordinary feed, that is, to cause a letter space feed movement of the carriage on the return stroke instead ofon the depression ofv the printing keys, it is/necessary to alter the disposition of the shift member or lever 60 and to change the latter from the position shown in Figs. and -t to that shown in Figs. 5 and 6. rlhis'alteration of position is accomplished in the manner hereinbefore explained,

From an inspection ot' Figs. 5 and 6 and a eomparison thereof with Figs. 3 and 4 it Will be al'rparent that the stop 63 at the upper end I ol' the shift lever has been moved rearwardly so that it will be ino )erative on the forward dog 52 and further that by reason of the engagement of the part 62 ot' said lever With the abutment 6h, the said lever Will be prevented from swinging about the pivot 51. l d'hen the parti 62 .of the lever is in enga e- 105 ment with the end of the abutment 68 t e. upper arm of thelever 6() will be forcedinwardly towards the dog rocker, pressing the rear dog 53 against its spring 57 mto Contact with the fare of the rocker as shown in Fig. 6, tlms loeking the dog 53 in iXed relation to the dog rocker. The pin or abutmentS is of sut-h length that when the. rear dog 53 contar-ts with the face of the dog rocker and the lower arm of the lever engages with said pin 68, said lever arm will be placed under Slight tension audits frictional engagement with the abutment 68 will assist the securing and holding screw 67 to maintain the lever 60 in v desired position.

1f desired the binding action of the screw 67 may be dispensed With and the frictional eontaet between the lever 6() and the dog 53 or pin 68 relied upon to hold the lever in its adjusted position. From what has been 125 said't will be apparent that with the lever 60 in the position shown in Fig. 5, the rear dog 53 will be held from movement relative to the dog rot-ker on which it is mounted and. the forward dog 52 will be free to swing about its 1 'pivot 51 during the operation of the parts 'and will at no time be aected by the lever thus arranged the working faces of the dogs,

as shown in Fig. 11, are so disposed that there is a slight drop from the front to the rear dog. This is for the purpose of preventing edgewise engagement of the dogs when wear shall have taken place. y

The operation of the parts when arranged in the manner now under consideration will be brieflyexplained in connection with the diagrammatic views shown in Figs. 11 to 13, inc'lusive. The normal or initial position of the parts is shown in Fig. 11 with the forward dog 52 engaged with the tooth 39EL of the escapement wheel and pressed against the rocker arm 41 by the carriage main spring.. When a printing. or space key is adequately depressed the rocker arm 41 will be swung forwardly or in the direction of the y arrow in Fig. 11, and the dog 52 will be moved forwardly out of engagement with the tooth' 39a of the escapement wheel. As soon as the (100252 is disengaged from the tooth-39a, said'dog will be swung away from the dog rocker by the dog spring 56, the movement continuing until the lower arm or tail of the dog engages with the' dog rocker.`

When the disengagement-of the dog 52 from the tooth 39a takes place, the rear dog 53 will have .been swung forward into engagement with said tooth, as shown in Fig. 12', so that movement of the escapement wheel is prevented. At the completion of the rintingv key depression, the parts will be in t e position shown in Fig. 12, from an inspection of which it will be noted that the forward dog has been swung away from the dog roeker so that said dog on its return movement will pass into the escapement wheel between the teeth 39at and 39h. When the depressed printing key is released the type actuating mechanism will berestored in the usual manner and the .dog rocker will be swung back by its restoringispring 45, Carrying the dog 53 rearwardly in. the direction of the arrow'in Fig. 12 fand ut of engagement with' the tooth 39.av of the-.esc'apement wheel and bringing the front dog`52 f rward into the pathof said wheel lbetween he=-teeth 39 and 39h.

The dog 52.Will enter the 'space between thesetwoteeth before the dog 53 disengages frornthe tooth 39, so that as soonas said dog 53 clearsthe t oth 391fthe escapement wheel will be turne ,by the main or carriage springand the tooth 39", engaging the dog l52, will overcomel the swing the do 52 into contactwith the face ofthe dog roc er', thereby permitting a letter space feed movement of the carriage to take dog spring 56 and` place during the return stroke of the operated printing key. On the completion of the rey turn stroke of the printing key the parts will be in vthe position shown in Fig. 13` It will lbe apparent, therefore, that with the parts arranged as now under consideration, the letter space feed movement of the carriage will take place Whenever a printing key is op erated during the return stroke of the actuated printing key.

It will be understood that normally the forward dog 52 is maintained against the face of the dog rocker against the tension of the dog, spring 56 by the main or carriage spring acting through the escapement wheel 31 and that when the carriage is restored from left to right to begin a new line the escap'ement wheel will start to turn in reverse direction, that is, in the direction indicated by the arrow in Fig. 7, permitting the forward dog to move slightly to the right about its pivot under the tension of the dog spring 56 and bringing the dog stop 59 into operative position to prevent. other than a slight ,backward movement of the escapement wheel31.

If it should be desired again to obtain a reverse feed of the carriage, the screw 67 may be loosened and the shift lever swung forwar'dly from the position shown in Figs. 5 and 6 to that shown-in Figs. 3 and 4. In order to eEect an easy, certain andcorrect positioning of the shift lever the end of the stop portion or lateral arm 63 is beveled at 65 las 2 and 11),' the end of the -U-shape portion 6,4 is provided with the double bevel 66 and the corner of the arm 41 of the dog rocker is beveled as indicated at 41a. When, therefore, the upper arm of the shift lever is swung forwardly about the screw 67, the bevel 65 will coperate with the side of tlc front-dog 52, so that the lateral arm 63 may readily engage with said dog. At lthe same time the left-hand bevel 66 will coperatef.

with thebevel 41a' on the rocker arm and ra little later the other bevel 66 will cooperate previously described (see, for exam le, Figs.

with the dog 53, enabling the side ofthe U- shaped part 64 to move 1n between the face of the dog rocker and the dog 53.

It will be seen that .I provide a carriage feed mechanism comprising a rack member and two dog members with means for changing the character of carriage feedfrom ordinary vto reverse and vice versa, said means comprising a single stop 63 connected to be moved by one of said dog members and movable or shiftable by hand at one time into position to coperate withthe other dog member, and at another time into a/ po-- sition in which said stop is inoperative on said' other dog member. It will further be noted that in the present instance, the single shiftable stop is on a shift member or lever mounted on the normally disengaged dog rmember and is adapted to be maintained in a normally disengaged dog Aand the other arm being adapted to co erate with an abutment or pin-on the dbg rocker. Furthermore, it will be seen that with a convertis ble escapement of the general class just described -I provide a back stop which is o era-4 tive to prevent a backward rotationo the escapement rack or wheel and that said back stop is operative when the parts are positioned for the reverse feed and also when they are positioned for the ordinary feed. The doo 52 which carries the back sto p is the normally engaged dog whether the arts are set for Iordinary or reverse eed.- In the former case the dog 52 is the stepping dog and thedog 53 is the holding dog; while in the latter case the dog 52-is the holding dog or detent and the dog 53 isl the stepping d og.

Various changes may be made in the details of construction and arrangements without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is 2,-

1. In a typewriting machine, the combination of carriage feed mechanism comprising a rack member and two dog members, and

. means for changing thecharacter of carriage feed from ordinary to reverse and vice versa, said means 'comprising a single shiftable stop connected to be moved by one -of said dog members and movable by hand at, lposition to cooperate with'.

one time into a the other dog member and at another time into a position in which said stop is inoperative on said other dog member.

2. In a typewriting machine, the combination of carriage feed mechanism, comprising a rack memberand two dog members, and means for changing the character of carriage feed from ordinary to "reverse" and vice Versa, said means comprising a single shiftable stop mounted on one dog member and movable by hand at one time into position to cooperate with the other dog member and at another time into a position in which said stop is inoperative onsaid other dog member.

3. In a typewriting machine, the combination of an escapement rack; 'a dog carrier; a pair of dogs pivoted on said dog carrier; and means for changing the character of the carriage feedi'rom "ordinary'" to reifer-se"y and vice versa, said means comprising a single stop mounted on one dog and rotatable by hand at one time into position to cooperate with the other dog and at another.

time into a position in` which it is inoperative on said other dog.

4. In a t ypewritmg maclnne, the combina- ,tion of a toothed escapement wheel; a pivoted vibratory dog carrier; a pair of dogs t pivoted on said dog carrier g and means for changing the character of carriage feed from lLordinary to reverse and vice versa, said means comprising a single stop mounted on one dog and rotatable by hand at one time into position to cooperate with the other dog and at another time into a position in which it is inoperative' on said other'dog;

ber in desired position.

5. In a typewriting machine, the combination of a rack member; a dog carrier; a pair of dogs pivoted thereon; springs coperative with said dogs and tending to press them independently'in the same direction; and means for changing the character of carriage feed from "ordinary" tov"reverse and vice versa comprising a single stop se` cured on one dog and rotatable by hand at one time into a Apositionto cooperate with the other dog and at another time into a position in which' said stop is inoperative on said other dog.

G. In a typewriting machine, the-combination of a rack member; a dog carrier; a pair of dogs pivoted thereon; springs copera- `tive with said dogs and tending to press them independently inthe saine direction; and a single stop secured to the normally disengaged dog and` manually `movable at one time into a position in which it is .onthe normally engaged dog when the latter and at another time into a position in which said stop is inoperative on said normally engaged dog.

7. In a typen-riting machine, the combination of a rack member; a dog carrier, a pair of dogs pivoted` thereon; springs cooperative withsaid dogs at one side of their pivots,1 said springs tending to press said dogs imlependently in the same direction; and a shift member secured io one of said dogs at the opposite side of its pivot from the. cooperative spring, said shift member being movable by hand into and out of position to cooperate with the other dog at the same side ol the pivot of the latter dog at which the spring of said dog operates.

S. ln a typewriting machine, the combination ol a carriage; an escapement wheel operati\'el connected therewith; a (lograrrier; printing keys operable to yibrate said carrier; a piyoted spring pressed dog carried by said carrier and normally in engagement with said esca'wnnnt wheel; a second piyoted springI pressed dogl mounted on said dog carrier and normally disengaged from said csrapcmenl wheel: andl a shift. leyer secured to said second dog and manually rota-table thereon, said lever in one position cooperating with both dogs so that at each operation ol. a printing hey a letter space 1s disengaged during letter space movements,

and means for maintaining said shift memoperable IOO feeding movement of the carriage is effected as theactuated printing key is depressed and said lever inanother osition ceper'ating A only with the norma ly disengaged dog whereby the feeding movement takes place on .the return movement ofthe actuated printing key.

9. In a typewriting machine, the combinationof carriage feed mechanism comprising `a rack member and two dog members; and` means for .changing the character of cariiage feed from ordinary to reverse an vice versa, said means comprisingr a shiftable member carrying spring arms which assist to maintain it in engadement with one of said dogs in either of the two positions to which said s liiftable member may be set with reference to said dog.

y 10. I -n` a ty pewritinff machine, the combination of carria e feed mechanism comprising a rack mem er and two dog members; and means for changing the character of carria e feed from ordinary to reverse an vice versa, said means comprising a shift lever mounted on one dog member and movable into and out of a position to coperate with the other dog member, said lever having sprin arms which assist tomaintain it in either o' its positions.

11. In a typewriting machine, the combination of an escapement rack; a dog carrier; a pair'of dogs pivoted on said dog carrier; and means for changin the character of carria e feed from .ordmary to reverse an vice versa, said .means comprising a shift member-mounted on one dog member and movable into and out of 'position to cooperate'with the other dog member and also comprising an abutment on said dog rocker with which said shift member engages in one of its ositions. l

12. a typewriting machine, the combination of an escapement wheel; a vibratory dog carrier; sprinfT pressed dogs pivoted on said carrier; a shifbt lever secured onone dog and rotatable by hand iiit andout of position to cooperate with'the other dog, said lever having a s ring arm and a spring fork, the fork of said ever being coperative with the dog in which the lever'is pivoted; and an abutment on said dogrocker with Which the spring arm of said lever coperates.

13.' In a typ nation of carriage feeding devices comprising a rack member and two dog members; a back stop operatively connected with one of said dog members; and the character of carriage feed from ordinary to reverse and vvice versa, said back stop being operative both with the "reverse and with the ordinary feed.

14. In a typewriting nation of an escapement rack; a dog carrier; apaiiof dogs mounted on said dog carrier; a 65 back stop carried by the normally engaged ewriting machine, the combi.

means for changing machine, the combix one of -said dogs; and means for changing the character of carriage feed from ordinaryto "reverse and vice versa, said'means comprising a shift member mounted on one dog and coperate with' the other dog.

15. In a typewriting machine, .the combinationpf a toothed escapement Wheel; avi-,

bratory dog carrier; apair f'dogs 'pivqted on said do@ carrier; a back stop carriedl'by the normally Aengaged one of said dogs; and means for changing the character of carriage feed from ordinary to reverse and vice versa, said means comprisin ber mounted on one dog an and out of position to cooperate with the other dog. v

shiftable intoand 'out lof position to ashift mem-A rotatable into.

16. In a typewrlting machine, the combiv nation of a toothed escapement Wheel; a vibratory dog carrier; a pair ,of dogs pivoted thereon; a back stop carried by the normally engaged one of said dogs; springsl coperative with said dogs and tending to press' them independently inthe same direction; and a shift member secured on ne dog and rotatable by hand into and out of position to cooperate with the other dog.

17. In a typewriting machine, nation of a toothed escapement wheel; a vibratory dog carrier; a pair of dogspivot-ed thereon; a back stop carried by the normally engaged one of said dogs; springs coperative with said dogs and tending .to press the combithem independently in the same direction;

and a shift member secured to the normally disengageddog and manually movable to a position 1n which it is operable on .the normally engaged dog when the latter is disengagedduring letter` space feeding movements, said shift member being further movable to a position in which it is inoperative on the normally engaged dog.

18. In a typewritmg machine, nation of a carriage; an escapement -whel operatively connected therewith; a dogv darrier; printing keys operable to vibrate s'aiel/ carrier; a spring pressed dog pivoted on said carrier and normally in engagement with' said escapement wheel; a back stop carried by the normally engaged dog; a second spring pressed dog pivoted on said dog rocker and normally disengaged from said escapement wheel; and a shift lever` secured.

the combi.-

thereon, said lever in one position coperating with both dogs so that at each operation of a printing key a letter space feeding movement of the carriage is effected as the actuated key is depressed and said lever in another position coperatin only with the normally disengaged dog, w ereby the feedingv movement takes 4'place on the jfreturn movement of the actuated key.

19. In a typewriting machine; the combi- 'nation of carriage feeding mechanism coniprising an. escapolnent rack, a. vihralory d opr Carrier and :L pair oi spl'ing-pnwsml dogs pivoted on said dogr carrier, th(` mmv, om oly will dogs being nlWzyYS nornmlly in. omfngolnvhl with said ooapcmenty whool and ming ulways free to be moved indopfndonlly when freed from said escapolnonl, ruck g :L nnivorsal bal' constantly connected with said dog Garrier; printing keysvopcmtiw on szlld universal bar; andnleans for changing the character of the carriage feeding mechanism l'ronl ordinary to revelnse and vico vern,

said moans con'lp'iising a, single shiftahlc stop operativo in nu position to be Inovod by ono dog und lo mov@ the other 'dogg said stop when .shil'iod Lo :mother position lming inoperative on one oi' said dogs.

Signed at Syracuse, in the county ol Onondaga, and State of New York, this 25rd da)Y of April A. D. 1906.

EDWlN F. BARNEY.

Titi-losses JOHN S. MITCHELL. W. J. LOGAN.

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