US904233A - Type-writing machine. - Google Patents

Description

FIQI.

WITNEEISE'EL- G. A. SBIB.

TYPE WRITING MACHINE.

urmonxon mum HAY a, 1900.

Patented Nov. 17, 1908.

I SHEETS-BIBS! 1.

|NVENTUR=' G. A. SEIB.

TYPE WRITING MACHINE.

uruouxon mum Inn, 1006.

Patented Nov. 17, 1908.

8 SHEETS-SHEET 2.

INVENTEIR:

N 11 ,F N o B 5 mm M iv 1 m Q Mm MN 0P mm w an on 63 9 2 aw n2 @m mm 1. Q 8 no. .5 m cm I. O 1-| M 1 on B 3 o m 1 M 1 b 3 a a i s w a 3 VJiTNESSEEI:

Hi TTDRNEY G. A. SEIB. TYPE WRITING MACHINE. APPLICATION FILED MAY a, 1906.

904,233. Patented Nov. 17, 1908.

3 BHEETSBHEET 3.

W WM/{9% ATTORNEY UNITED STATESBATENT OFFICE.

GEORGE A. SEIB, ()F SYRACUSE, NEW YORK, ASSIGNOU. TO THE MOXARGH TYPEWRITER COMPANY, OF SYRACUSE. NEW YORK. A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification 0! Letters Patent.

Patented Nov. 17, 1908.

Application filed Kay 8, 1906. Serial No. 316,851.

To all whom 'i t may concern:

lc it known that I. (iEHlio'l-Z .t. Stun. citizcn of the United States. and resident of Syracuse. in the county of Onondaga and State of New York, have invented certain new and useful Improvements in 'l'ype-Vt'riting Machines. of which the following is a specifi cut ion My invention relates. more especially to that form of carriage feeding nieclnuiism for tvpewriting nnichines which is separnbly or dctachahly connected with the carriage or traveling element. In ouch con=tructions it sometimes happens. as for exam pie when the carriage is being back spaced or moved in reverse direction a lettc' spat-e distance at a time. that the carriage is moved so quickly that its momentum overcomes the tension of the spring or springs which are usually employed to maintain the carriage operativcly connected with its letter epacc feeding mechanism and in consequence the parts of the detachable connection separate or jump out of engagement and thus permit the carriage to more more than the desired distance.

The main object of the invention. generally stated, is to prevent the separation of the carriage from its step-bv-step feeding mechanism when such separation is not desired.

In the form of the invention shown in the accompanying drawings the separable connection between the carriage and its step-b3"- step feeding mechanism comprises a feed rack moimtcd on the carriage and a feed pinion mounted on the frame of the machine. stlitl rack and pinion normallv meshing but being adapted to be separatei to release or free the carriage. The rack and pinion are maintained in mesh in spring pressure. Fixcdly connected with the pinion in.thc present inslzl'llte is a back spat-e wheel which is operative by a key actuated pawl to turn the carriage in reverse direction a letter space distance at a time.

In carrying out my invention. in order to prevent separation of the rack and pinion if the pack 3 nice pawl should he too forcibly actuated l provide u latch which is automatically operated by the hack space pawl to lock the rack and pinion together so as to prevent excessive backward movement of the carrin e.

It will he understood that in the present;

I form of HR invention the ruck and pinion are nornnilly separable hut are :intunnttically locked together or positively maintained in engagement. when the buck spacing devices are 0 )erated. The back spacing devices are not claimed per s4 herein as the) are part of the subject-matter of an application filed by inc of even date herewith. Serial No. 315,850.

To the uhove and other ends the invention consists in the features of construction. combinations of devices and arrangements of parts hereinafter full) described and particularly pointed out in the claims.

in the iiCtOlll1)fllt \'lllg drawings, Figure l is a vertical front to rear sectional view of so much of a typewriting machine as is necessnry to :1 clear understanding of my invention. Fig. 2 a rear elevation of the machine. parts being broken away and parts being omitted. Fig. 3 is a full-sized top plan view of part of the carriage and the carriage feeding mechanism. showing my invention applied thereto. parts bein broken away and parts hcinq omitted. Hg. 4 is a fragmentary top phln view showing the locking mechanism for the feed rack and the associale parts. the back space pawl being shown in section. 5 is a rear elevation of a part of the but: spacing mechanism. the top ilate of the machine being shown in section.

ig. 6 is a view corresponding to Fig. 5 but showing some of the parts in difi ercnt relations from those in which they ap car in said Fig. Fig. 7 is an enlarge transverse central sectional view of the escapemcnt wheel. buck space wheel. and their associate devices. Fig. 8 is a sectional View taken on a plane represented by the line -.ra: in Fig. 7 and looking in the direction of the arrows at. said line. Fig. 9 an enlarged fragmentary rear view showing tort of the cocnpcment wheel and the nornm v engaged cscupen'lcnt dog. which dog is provided with a hack stop. said back stop being shown in operative position. Fig. 10 is a perspective view of a member hereinafter termed a locking lever.

My invention is shown as applied to a machine generally resembling the Monarch typewriter. but it is to he understood that the nature of the invcntimi is such that it may readily be adapted to other forum of writing machines.

Referring first to Figs. 1 and 2 of the drawings the frame of the machine is shown as comprising a base 1, corner posts 2 rlsin from said base and a to plate 3 supporter on said corner osts. I ey levers 4 are fulcrumed on a to crum plate 5 mounted at the rear of the base, each key lever being provided with a restoring spring 6 and having ivoted to it at 7 a sub-lever 8. Each sublizver is slotted at 9 to cooperate with a fixed abutment 10 extendin from side to side of the machine beneath t e key levers. A link 11 connects the upper end of each sub-lever with a ty 0 bar 12 pivotally supported in a type bar anger 13, said hanger being secured by a screw 14 to a vertically disposed segmental t-y e bar support 15. For the purposes of t e present invention it is immaterial whether or not said segmental support is shiftable but in this construction of machine said segmental support is rovided with suitable shifting mechanism. he type bar han ers 13 are radially arranged in seg ments 0 circles and the type bars 12 are normally supported at their free ends on a type rest 16 and are adapted to cooperate wlth the front face of a rotary platen 17. The latenis journaledinside bars 18 extendorizontally forward from the opposite 31 5s of a rear bar 19 said side bars and rear bar constituting a platen carrier or carriage. The to and bottom faces of the rear bar are formed with longitudinal grooves to cooperate with anti-friction balls :20, said balls also cooperating with top and bottom stationary grooved guide rails 21 secured by screws 22 to standards 23 rising from the top plate. Bearin lu s 24 project inwardly from the rear 0 eac side arm 18 of the platen carria e as best shown in Fig. 3. Journaled in said heal-i lugs are pivot pins 25 which have seem- 22% to their inner ends rearwardly projecting arms 26 and to their outer ends, iy screws 27, release levers 28, each of the latter terminating at its forward end in a release key 29. V

Suitably secured to the rear end portions of the pivoted arms 26 is a carriage feed rack 30, said feed rack normally meshing with a carriage feed pinion 31 which is fixed at the forward end of a shaft 32 journaled in a bracket 33 fixed to the top plate by screws 34. A circular feed rack or escapementwheel 35 is loosely mounted on the rear end portion of the shaft 32, said escapement wheel, as shown in Fig. 7, having a forwardly projecting hub 36 which surrounds the shaft 32 and serves as a bearing therefor and which in turn has a bearing in the supporting bracket 33. The esca ement wheel 35 is provided with periphera teeth 37 and has suitably secured to its rear face, as by rivets 38. a small ratchet wheel 39 (Figs. 7 and 8). A housing or cover 40 surrounds the ratchet wheel 39 and is rovided with a central boss or hub 41 wliich receives set screws 42, the ends of said sci screws abutting against. the rear end purlion ot' the shaft 32 and serving to maintain the housing in a fixed relation with said shaft. .1 pawl 43 is pivoted at it to said housing and is pressed mlo engagement with the ratchet wheel 3%,) by a leaf spring 4.1. said spring bein secured by a rivet 413, to the inner wall 0 the housing 40. The construction is such that when the shaft 32 l l turned in letter space direction, indicated by the arrow in Fig. 8. the esrupemcnt wheel 35 is caused to turn with said shaft by reason of the enqagemcnt of the pawl 43'with the ratchet wheel 39. but when the carria e is retracted and the shaft is turned in the opposite direction the pawl 43 is uda )ted to i e over the teeth of the ratchet w ieel 3H and a relative turning movement between the shaft 32 and the escapement wheel 35 may be effected.

Fixedly secured to the rear end portion of the shaft 32 is a toothed back space wheel. In the present instance I prefer to provide such a ratchet wheel by formin the periphery of the housing -t() with teeth 47. In this construction the housing 40 not only serves its original purpo e as a cover for the ratchet wheel 39 and pawl 43 but also performs the functions of u back spare wheel which is cooperative with the other back spacin f devices presently to be described to effect a step-by-step movement of the carriage backwardly or in an Opposite direction to the step-by-step letter space feeding movement thereof.

Normally engaging one or another of the teeth 37 of the escapement wheel 37- is a (log 45 pivotally mounted at 49 near the top of the upright arm 50 of a vibratory (lug carrier or roc er 51. said dog carrier. as clearly shown in Fig. 2. being pivoted at its ends on screw pivots 5-2 which are su ported in a bracket 53 depending from the top plate. The dog 48, best shown in Fig. 9. is provided with an individual dog spring 54 which constantly tends to press the dog-5 away from the face of the rocker arm 50 or towards the right in Fig. 9. 1 back stop 55 is preferably mounted on the dog; 48 and is nda ted to cooperate with the backs of tintech 37 of the escapement wheel to prevent excessive reverse turning movement of said escapement wheel. said Jtlt'li slop operating for this purpose in a manner fully set forth in the patent to (arl (iahrielson. No. 717,837, dated January 6th. 1901-3. The operative position of the back sto is shown in Fig. 9 but it will be understom that normally said stop is maintained out of the path of the teeth of. the escapement wheel. as shown in Fig. 52. A second dog 56 is mounted at the top of the dog ro ker and is adapted to cor'iperate with the esrapement wheel but is normally disengaged therefrom.

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In the present instance the do 56 is shown secured in fixed relation with the rocker arm 50. The dog rocker is provided with a restoring spring 57 and has a horizontallv disposed forwardly projectin arm 58. wine I is connected by a link 59 wit I an arm 60 of a universal bar frame ivoted at 61 near the sides of the base an carrying a universal bar 62. Said universal bar extends from side to side of the machine beneath the series of character key levers 4 and the space levers (not shown)- 'hen any key lever 4 is actuated the associate type bar is mused to coiiperate with the platen in a known manner and the dogs 48 and 56 cooperate 'with the escapement wheel 35 to permit the carriage to be moved a letter s aeedistunce towards the left under the in uence of the carriage spring drum 63 pivoted at 6-} to the bracket and connected by a band or strap 65 with a pin 66 depending from the rear bar 19 of the carrin e.

It is at times desirab e to move the carriage a lette r space distance at a time in reverse direction. that is, in a direction oppcsite to that of the letter space feed movement. To accomplish this result I provide 1 mechanism now to be described. A back spacing pawl arm 6'? (Figs. '2. 5 and 6) is pivoted at 68 to the left-hand arm tconsidcred from the front of the machine) of n horizontally disposed lever 69 of the first order. said lever being pivoted at T0 to :2

lug 71 depending from the top plate 3. The

pawl arm 67 is provided with a tail portion 72. said tail portion being normally maini mined in engagement with the under side of the top plate by a Cslmped spring 73. said spring being secured to the lever 69 at one end by a screw 7-! and hearing at its free end i against the tail of the pawl. The pawl arm or aw] 67 is vertically disposed and is pro- \lt ed at its upper end with a pawl tooth T5 at one side and at the opposite side with a cam face 76. the purpose of which will be presently explained. From an inspection of l Fig. 2 it will be noted that normally the pawl tooth T5 is disengaged from the teeth 47 of the back space wheel or housing 40. 1

The left-hand arm of the pawl supporting front of the machine. is provider] with a stop portion ,7? which is normally maintained in contact with the under side of the top plate. The righthand arm of the lever 69 (viewed from the front of the machine) is connected by a vertically disposed link 78 with a key lever 79. pivoted at. 80 (Fig. 1) intermediate its ends to :1 lug 81 Fig. 2) projecting laterally inward from the right-hand side of the base. The key lever 79 is provided with a key button 82 and with a restoring spring H3 which is coiled around the supporting lug R1 and serves to restore the key lever 79 to normal posit-ion and to nornmlly maintain and actuating lever 69. as viewed from the l i the stop portion 77 on the lever 69 in contact with the top plate. as illustrated in F i". "3.

llet'crriug now to the operation of the buck spacing mechanism, when the buck space key S2 is actuated the rear arm of the lever 79 will be elevated. raisin the link 78 and the right-hand n rm of the ever (39 and lowering the left-hand arm of said lever about the pivot it). During the first part of the downward movement of the lefblmnd lever arm. the tall 72 of the buck space )awl GT will be maintained in contact with t lc top )late by the swing T3. the result being that t 1e pawl will turned on its pivot until said pawl engages with the back spare wheel 40. Fig. 5 illustrates the position of the pawl 61' at this stage. the pawl tooth 75 being fully cngaged with one of the teeth 47 of the back i spacc'whecl. \Vhcn the pawl Iii has been turned on its pivot to the position shown in Fig. .3. further inward pivotal nmvement of the mwl will be prevented by the engaged tooth ii of the back space wheel and as the i downward movement of the left-hand lever arm of the lever 69 is continued the pawl will move down with said lever arm and be- 1 cause of the engagement of said pawl with i the back space wheel will turn said back space whee in the direction of the arrow in Fig. and from the )ositien illustrated in snid figure to that shown in Fig. 6. As ishown in the latter figure the downward movement of the pawl is arrested by the engagemcnt of the right-hand end of the lever 69 with the under side of the top plate 3. I The back space wheel. it will be recalled. is i fixedly connected with the shaft 32 so that 5 during this turning movement said shaft will be turned with the back space wheel and the i pawl 43 will slide over one of the teeth of the ratchetwheel 39 and will engage behind said tooth, thus holdin the back space wheel and the parts control ed thereby In the po- 1 sitions to which they have been moved. The shaft. 32 is connected through the pinion 31 and rack 30 with the carriage and consequently the carriage will be moved in reverse direction, the parts being so proporj tinned and arranged that at each actuation of the back space key 82 the extent of the backward movement of the carria e amounts f to one letter space. When the lmck space key is released the key lever 79. link is and E lever 69 will be restored to normal position 3 by the spring 83. 3, During the latter part of the return movel meat of the lever 69 the tail T2 of the hack E space pawl will be swung pivotully outward l or away from the buck space ratchet wheel so that when the parts reach normal position the buck space pawl will be. completely (lisl engaged from the back space wheel as shown back spare wheel 40 and shaft 32 these parts will turn relatively to the escapement wheel .-\s soon as the pressure of the carriage main spring is removed from the escapement wheel during the initial part of vac 1 back rpllt'tb movement, said escapement wheel will turn sli htly in reverse direction, both be cause 0 the friction of the pawl 43 on the ratchet wheel 39 and also because of the pressure of the dog spring 54 on the teeth 37 of said cscapomcnt wheel. A very slight reverse movement of the cscapement wheel, however, suflices to bring the back stop into operative position as shown in Fig. 9, thereby preventing further turning of said esca ement wheel in reverse direction and holdin itmotionless during the remainder of the back space turning movement of the other parts.

It will be noted that in the hereinbefore described construction the carriage is separably or disconnectibly connected with its letter s iace feeding mechanism by means of the rate 30 and pinion 31, said rack being adapted to be swun u ward about the pivots '25 out of mesh with t e pinion by pressure on either of the release keys '29. hormally the rack 30 is maintained in mesh with the pinion 31 by s ring pressure in a manner presently to be ascribed. Prior to my present invention in machines employing a disconnectible or separable spring pressed connection between the carriage and its letter space feedin devices it has sometimes hap pened that the back space devices have been operated with so much force that the carriage acquires enough momentum to overcome the tension of the spring connecting it with its letter space feeding devices so that the carriage rack is forced out of engagement with the feed pinion and allows the carriage to more two or more letter space distances instead of one in backward direction. The angle at which the teeth of the rack and pinion engage with each other is conducive to this separation or disengagement. as will be clearly understood from an inspection of Fig. 2.

In order to prevent umlcsircd or chance separation or discount-ct ion of the. carriage feeding (lt\l('t.-' from the carriage. I provide means for locking the carriage feed rack and feed pinion in mesh so as to maintain them positively engaged at desired times. as, for example. during the operation of the back spacing devices. In the present instance I have shown said locking means as normally inoperative and have provided means ogwrating automatically to lock or operate said locking means when the hack spacing devices are actuated. The preferred form of this character of locking means comprises two coiiperutiug locking members. one of which is shown detached in Fig. 10 and is designated as a whole by the numeral 84.

; The member 84 is an L-shaped lever preferablr made of sheet metal and comprises a body portion 8.) having an opening near one end and an arm 87 rising substantially at right angles from the body portion at the other end thereof and terminating in a lip or hook S8. stop arm 89 depends from the body portion about centrally thereof.

As clearly shown in Fig. :2 the member or lever 54 is pivotally secured to the lower fixed trackovap 21 by means of a shouldered screw 91) whici passes through the opening oil in the body of the lever and enters a threaded opening in the rear wall of the track-way '21. In normal position the stop arm 89 contacts with the top plate 3 and the lip lies over and just out of contact with the top edge of the feed rack 30. A stop ledge or hp 91 is bent backward horizontally from the upper edge of the body pornou 8.3 of the member 84 near the arm 87, and secured to the under side of said ledge 91 by a headed screw 92 is a flat 5 ring 93 (Figs. 2 and 3), said spring exten ing obliquely downward towards the top plate. the free end of said spring contacting with the top plate at the opposite side of the pivot screw from the point at which said spring is secured to the lever 8-1. The arrangement is such that the spring 93 tends to maintain the lever 84 constantly in the position shown in Fig. 2. A very slight upward movement of the carriage rack 30 about its pivots suffices to bring said rack into contact with the stop lip of the lever 84 and any further upward movement of the rack will be against the pressure of the spring 93. The spring pressure. of course. comes into play before the disengagement of the rack teeth from the teeth of the feed pinion 2-31. so that in etl'ect said rack main tained in spring pressed engagement with said pinion while at the same time during longitudinal movements of the carriage to and fro, the rack. being 'ust outof touch with the stop lip 88. wil not frictionally engage the latter unless during such longitudinal movements the rack should be slightly thrown upwards about its pivots.

Rising from the top plate at the rear of the member or lever $4 is a short post or standard 94 and pivolally secured to the top of said post by a shouldered screw 95 a second locking member which as herein shown is in the form of a lever or latch 96 having a forwardly projecting arm 97 and a rcarwardlv projecting arm 98 from one side of whic l latter arm depends a stop lug 99. coiled spring 100 surrounds the post 94 below the latch 96, one end of said s wring: engaginga hole in the rear arm 93 0 said latch and the other or lower end of said spring being secured in a collar 101. The collar surrounds the 10st 94 and may rest on the top plate 3 of tie machine, being nortill bv a set screw 10), but being circttnifercntially adjustable on said post so as to rogue late the tension of the spring 100. spring tends constantly to swing the rear arm of the latch 96 to the left or in the direction of the arrow in Fig. I} and to maintain the stop ltw i l on said arm pressed against the left hand end of a comb plate 103. which comb plate is secured by screws 1% to the top of lugs 10:) of a supporting bracket 106 for a tahulating mec anism. Said tabnlating mechanism forms no part of my invention and it is not deemed necessary to describe its parts further. It will be seen from an inspection of Fig. 3 that when the latch is in normal position the end portion of its forward arm 97 is at the right of and-out of the )ath of the stop ledge 91 on the lever 54. "rout an inspection of Fig. 2 it will be noted that in the normal position of the latch 96 the inner edge of its rea arm lies below and inwardly or towards the center of the machine from the cam face T6 on the pawl 07.

From what has been said it will be apparetttthat when either of the release keys 29 is operated the carriage feed rack 30 will be swung upwardly about its pivots and after a very slighLinwai-d movement will engage the lip of the member 84. the remainder of the releasing movement of the rack being made against the pressure of the spring 9 5. which sprin will restore the rack into engagement with the feed pinion when pressure is removed from the release key 2 During the releasing movement of the rack the lever will be swung upwardly about its pivot screw and will not 96. there being: sufficient space between the arm 97 of the latch and the spring 93 to permit this movement.

When the back space key 5:! is actuated the initial movement of the pawl 6? will. as has been explained. he a pivotal one and said pawl will be swung about the screw 63 from the position shown in Fig. 2 to that shown in Fig. 5. From an inspection of Fig. 5 it will be seen that the lower end of the cam face Tl; will at this time lie just above and out of engagement with the inner edge of the rear arm of the latch fill. During the subsequent downward movement of the pawl 67 the cam face Tlwill engage with the inner edge of the rear arm $58 of the pivoted latch on. swinging said arm about the pivot in the direction of the arrow in l ig. 4 and swinging the forward arm 9? of said latch to the left and over the ledge 91 of the member The arm 97 of the member or latch 9tjust clears the ledge 91 so that the pivotal movement of the member 96 is free except for the resistance of the Enid coiled spring 100. When the pawl 67 reaches the limit of its downward movement, as shown in Fig. the latch on will be in the position illustrated in Fig. -l-. From an inspection of the latter figure it will be apparent that the latch 96 is in a position to prevent other than a very slight upward movement of the lever Si about its pivot 9f). the ledge 91 of said member as soon as it starts to rise coming in contact with the forward arm 97 of the locking member or latch 96. It will, however. be apparent that the cam face 76 of the pawl (3T serves during the back spacing movement of said pawl to automatically bring the two parts 84 and 96 of the locking mechanism into cooperative relation to lock the separable or disconuectible connections between the carriage and its step-b v-step feeding devices. that to maintain the rack 30 and pinion 31 positively in mesh so that overthrow or excessive movement of the carriage (luring back spacing operations is prevented. When the back space key 52 is released the parts of the back spacing mechanism will be restored to normal position as previously described. the pawl 67 as it moves a )ward permitting the latch 96 to be restored by its spring 100 to the inoperative position shown in Fig. 3.

Various changes mav be effected within the scope of my invennon.

What I claim as new and desire to secure by Letters Patent. is:-

t. In a typewritinp machine. the combination of a carriage: step-bv-step feeding mechanism for said carriage normally discounectibly connected to said carriage:

means for locking said step-bv-stcp feeding niecliamsm and said carriage in positive enbe checked or intertcred with by the latch gagement. said means being normally inoperative: and key actuated means for renderinn operative the locking means.

2. In a t vpewritiug machine. the continualtion of a carriage: carriage feeding mechanism int-hiding devices normally adapted to be maintained in spring-pressed engagement and capable of being disconnected to release said carriage: a key for spacing the carriagu and means autonattically operative by said key for locking said disconnectible devices in operative relation. said means be ing normally inoperative.

i. In a t v| ie\vritin nutchine. the combination of a carriage; s1ep-b v stt-p feeding: mechanism for said carriage uorumllv discouner-tihly connected to said carriage: back spacin; devices for said carriage: and means operating automatically to loch said tep lrvstep feeding mechanism to said carriage when said back spacing devices are operated.

4. in a typewriting machine. the combination of a. carria e: carriage feeding devices including a raclt and pinion normalhdisconnect-ible: means for locking said rack and lltl inion in mesh, said means being normally inoperative; and key actuated means for renderm operative the locking means.

5. n a typewriting machine. the combination of a carria carriage feeding devices inclndin a rac and pinion normally disconnecti In to release said carriage: hack spacing devices; and means opera-ted bv said back spacing devices to lock satd rac and pinion in mesh.

6. In a type-writing machine. the combination of a carriage: a feed rat-lg connected thereto; step-by-step feeding devices including a feed pinion on the frame of the ma chine, said rack and pinion being normally disconnectible; back spacing, devices for said can-la and means operating automatically to 100 said rack and pinion in mesh when said back spacing devices are operated.

7. In a typewriting machine. the combination of a carriage: step-by tep feeding mechanism therefor; means normally adapted to maintain said carriage in disconnectible engagement with said step-by --tep feed ng mechanism: and other means for rendering said last recited means operative to lock said carriage and its step-bv-stepfeedinv mechanism in positive engagement. other means being normally mo rative.

8. In a typewriting mac ine. the combination of a carriage: step-b v-step feeding mechanism therefor; back spacing devices: means normally adapted to maintain said carriage in disconnectible engagement with said step-by-step feeding mechanism: and means operating antomaticallv on said first recited means when said bat k spacing devices are actuated to cause said tiLt recited means to lock said carriage and its step-bystep feeding mechanism in positive engagement.

9. In a typeivi'iting machine. the combination of a carriage; step-by-stei feeding devices therefor inclndin aracl: and PllllOIl normally disconnectih e: a two-part lock operative to lock the rack and pinion in mesh. but normally inoperative to do so: and key actuated means for renderin the two-part lock operative to lock the me and pinion in mesh.

10. In a type-writing machine. nation of a carriage; carriage f vices including a rack and inion; means for disconnecting the rack an pinion: a member adapted to maintain the rack and pinion in spring-pressed enga ment; and means for renderl said main 1' operative to lock said rack ant pinion in mesh. said means being normally inoperative.

ll. In a typewriting machine. the combination of a carriage: carriage feeding devices inclnding a rack and pinion; means for disconnecting said rack and pinion; back spacing devices; a member operating to the combiing demaintam said rack and pinion in springpressed enga ement: ally operatec by said for rendering said member operative to lock said rack an pinion in mesh.

12. In a t-ypewriting machine. the combination of a carriage: carriage feeding devices including' a rack and pinion: means for disconnecting the rack and pinion; a springpressed lever pivoted to a fixed patt and norand means automatichack spacing dc vtccs molly in position to engage one of the rack and pinion parts as it starts to nnmesh and hold said part spring pressed in mesh: and means for rendering said lever fixed so as to maintain said rack and pinion locked positively in mesh.

13. In a typevvriling machine, the combination of a carriage: a feed rack pivotally connected to said carriage: carriage feeding devices including a feed pinion journaled on a fixed part and normally mcshim with said rack: a lever pivoted to a fixed part and having a portion in :sition to engage said rack: a spring for said lever; and means for lockin said lever in normal position.

H. In a typewriting machine. the combination of a carriage: a feed rack pivotally connected to said carriage: carriage lecdina devices including a feed pinion jonrnaled on a fixed part and normally meshing with said rack: back spacing devices: a lever pivoted to a fixed part and having a portion in position to engage said rack: a spring for said lever: and means for locking said member in normal position. said means being automatically operated by said hack spacing devices 15. In a typewriting machine, the combination of a carria step-lrv-step feeding mechanism for sai carriage including, dis- .connectible devices: and means for locking.

said step by step feeding mechanism and said carriage in positive engagement. said means being normally inoperative and comprising a two part lock. one part of which is always in operative position.

16. In a tvpewriting machine. the combination of a carria e; step-lJystep feeding mechanism for sait carriage normally disconnectihly connected to said carriage: and means for locking said step-hy-step feedima mechanism and said carriage in positive engnpfment, said means com rising a two part In", one part of said loct b ein normallv in operative position and the ot ier part of said lock heing normal]; in inoperative posi tion.

17. In a typewriting machine. the combi nation of a carriage; step-hy-step feeding mechanism for said carriage normally disconnectihly connected to said carriage: hack spacing devices: and means for locking said step-by-step feeding mechanism and said carriage in positive engagement, said means comprising a two part lock, one part of said lock being normally in operative position i itl comprising a locking latch which is normally inoperative: and hey actuated means or rendering said locking latch operative. 19. In a typewriting machine. the combination of a carriage: step-by-step feeding mechanism for sai carriage normally disconnectihly connected to said carriage: means for locking said step-bystep feeding mechanism and said carriage in positive engagement. said means being normally inoperative and including a locking latch pivoted on a fixed portion of the machine: and key actuated means for rendering the locking means operative.

a typcwriting machine. the combil 1 l l g 1 I 1 g i 20. In a typevvriting machine, the com-- hination of a carriage: step-by-step feeding mechanism for said carriage normally dis conncctihlv connected to said carriage: and means including a two-part lock for locking 5 said stcp-hy-step feeding mechanism and" said carriage in part of said lock being norma position and the other part of sisting of a pivoted operative.

positive engagement. onei y in operative said lock conlatch normally in-;

21. In a typewriting machine. the comhination of a carriage; step-by-step feeding mechanism for said carriage normally disconncctibly connected to said carriage; and

means comprising a two-part mg said step-hy-step feeding mechanism and said carriage in positive engagement.

one of the parts consisting of a spring 1 pressed latch pivoted to a machine.

'29. In a typewriting machine. the combination of a carriage: step-by-step feeding mechanism for said carriage normally diseonnectibly connected to said carriage: back spacing devices: and means for locking said step-hy-step feeding mechanism and said carriage in positive engagement. said means including a locking latch pivoted on a fixed fixed part of the part of the machine and normally inoperative. said latch being rendered operative anlock for locking contactive with tomatically when said back spacing devices 5 are operated.

:23. In a typewriting machine. the combination of a carriage: step-by-step feeding mechanism for said carriage connected to said carriage; back s acing devices for said carriage including a liack space.

discon nectibl ria e in positive enga cment, said means inclm ing a pivoted latci operative by the back space )awl.

Bl. n a t \-'pe\vriting machine, the combination of a carriage; stcp-by-step feeding mechanism for said carria v disconnectibly connected to said carriage; )ack spacing devices for said carriage including a back space wheel and a back space pawl operative on said wheel and having a cam face: and means for locking said step-by-step feeding mechanism and said carriage in positive engagement. said means including a pivoted latch operative by the cam face of the hack space pawl.

25. In a typewriting machine, the combination of a carriage; step-by-step feeding mechanism for said carriage normally connectibly connected to said carriage; back spacing devices for said carriage including a toothed back space wheel and a key actuated pawl operative on said Wheel and having a cam face: and means comprising a two part lock for locking said step-by-step feeding mechanism and said carriage in positive engagement. one part of the twopart lock being composed of a spring pressed latch pivoted to a fixed part and normally inoperative. said latch being rendered operative by the cam face of the back space pawl when said pawl is actuated.

26. In a typewriting machine, the combination of a carriage: a feed rack pivoted thereon; step-b v-step feeding mechanism including a feed pinion having a shaft journaled on a fixed part: a toothed back space wheel fixed to the shaft carrying said pinion; a key actuated back space paw operative on said back space wheel and having a cam face; a 5 ring pressed lever pivoted to a fixed part an having an arm for controlling said feed rack; and a spring ressed locking latch or lever pivoted to a need part and normally inoperative. one arm of said latch being operative on said first named )ivoted lever to maintain the latter positively in normal position and the other arm of said latch hethe cam face on said back space pawl said latch being rendered operative automatically by said back space pawl when the latter is actuated.

Signed at- Syracnse. in the county of Onondaga. and State of New York, this 4th day of May A. D. 1906.

GEORGE SEIB.

Witnesses Jonx S. i\Il'IClIEl.L. IV. J. Lon-ix.

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