US904171A - Type-writing machine. - Google Patents

Description

W. J. BARRON. TYPE WRITING MACHINE.

APPLICATION FILED APR. 18, 1906. 904,171. Patented Nov. 17, 1908.

8 SHEETS-SHEET l.

4 fliillllli W J BARRON TYPE, WRITING MACHINE.

APPLIOATION FILED APE. 18,1906. PatentedNov. 17, 1908.

8 SHEETS-SHEET 2.

1 5. va imumv =7 n 3 a K R $50 W. J. BARRON.

TYPE WRITING MACHINE.

- APPLICATION FILED APR. 18, 1906.

904,171. Patented Nov. 17,1908. i 8 SHEETS-SHEET 3.

flax

WITNEEEEE1= 5% %44&/. M 52% A H|5 ATTORNEY |NVENTUR= To all whom it may concern:

- UNITED s Atrns PATENT OFFICE.

WALTERJ. BARRON, OF NEW YORK, N. Y.', ASSIGNORTO DENSMORE TYPEWRITER COMPAN OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING mAcnmE.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Beit known that I, IVALTER J. BARRON, citizen of the United States, and resident'of the borough of Brooklyn, in the city of New York, in the county of Kings and State of New York,- have invented certain new and useful Improvements in Type-WVriting Majchines, of which the following is a specification.

My invention relates to typewriting machines and more particularly to back spacing mechanism therefor. 7

One object of my invention is to provide a simple and efficient back spacing mechanism by which the carriage may be moved back step-by-stepin a direction opposite to that in which it travels during the ordinary op- ,eration of the machine.

A further object of my invention is to provide mechanism of the character specified which may be employed to afford a back feed of the carriage one or more letter space distances at a time as may be desired at each operation.

A still further object of my invention is to provide means of the character specified which are in the nature of attachments and may be applied to existing forms of typewriting machines without changing the structural features of said machines.

To the above and other ends which will hereinafter appear my invention consists in I the features of construction, arrangements of parts and combinations of devices to be hereinafter described and particularly pointed out in-the appended claims.

In the accompanying drawings, wherein like reference characters indicate corresponding parts in the various views, Figure 1 is an enlarged fragmentary. plan view of a Densniore typewritingmachine with the attachments of my invention shown applied thereto.

Fig. 2 is afragmentary front elevation of the upper portion of the same with parts broken away. Figs. 3 and 4 are fragmentary detail views in front elevation and with parts broken. away of the back spacing mechanism and parts of the typewriting machine to which the attachments are applied. Fig. 5

a fragmentary detail plan View. of the.

ordinary es apementmechanism of the machine onan enlarged scale. Fig. 6 is a rear elevation of the same. Fig. 7 is an enlarged detail fra mentary front elevation showing a 'mo'difie form of back spacing mechanism the rack 5.

embodying my invention. 'Fig. 8 is a like View of the same showing the parts diflerently disposed. Fig. 9 is a detail transverse sectional view of the parts shown in Figs. 7 and 8, the section be1ng taken on the line a:;c of Fig. 8 and looking in the direction of the arrow at said line... F i 10 is a detail perspective view of a pivote a part of the structure shown in Figs. 7, 8 and 9.

In the various views parts have been omitted and parts broken away to better illustrate other features of the construction I have shown my invention applied to a No. 1 Densmore machine to which the attachments may be readily applied without modifying any of the structural features of that machine, but it should be understood that the invention may be applied to various other styles of typewriting machines.

A top plate 1 of the machine supports a.

guide rod 2 which is surrounded by sleeves 3 that project inwardly from the forward ends of arms 4 connected to a carriage truck. A feed rack 5 is secured to the arms 4 of the truck and cooperates with a fixed dog or detent 6 and a loose or stepping do 7. The loose dog is slotted at 8 and headed screws 9 extend through said slots and take into threaded openings in a.plate 10 which consti-' tutes a dog rocker. This construction enables the loose dog to receive a longitudinal movement in the direction of the length of A spring 11 bears at its free end against the loose dog and tends to force it towards the right, this spring being pressed around a screw 12 carried by the dog rocker and secured at its opposite ends to a screw 13.

The dog rocker 10 is pivoted on a shouldered'screw pivot 14 which connects the dog rocker to a bracket arm 15 fixed to a spindle 16 which is adapted to turn on its vertical axis in a bearing 17 formed in the top plate 1. A stop 18 is adjustably held in its hearing, in a lug 19 which projects from the top late, by a screw20. A restoring spring 21 is connected at one, end to a pin 22 whichv projects from the top plate and is connected at its oppositeend to a bracket'arm 23 on the dog rocker. The pressure of the spring 21 is effective to turn the dog rocker ar und the vertical axis of its spindle 16 as we 1 as to turn it around its horizontal pivot 14, thus tending normally to maintain the loose dog in the elevated position and to force it stop forming.

its

into engagement with the feed rack 5. A

' spring drum 24 is connected to one end of a band 25, the opposite end of the band being connected to the feed rack 5 so that the, pressure of the spring drum tends constantl the platen is turned to inspect the writing,

said bearings being open at the top to permit removal of the platen. The front cross bar 27 of the platen frame hasopenings 34 and- 35 therein. Anti-friction rollers 36 are mountedon screw pivots 37 which extend through the bar 27 in opposite directions and cotiperate with the trunnions 38 of the antifriction rollers. Each of the rollers 36 is contained in an opening 34 in the front cross bar and is received at 1ts tread in a substantially V-shaped groove 39 of ashift rail 40 carried by arms 41 which are actuated by the usual or any suitable means (not shown) to effect a backward and forward'movement of the shift rail to' change the case position of the platen. During this movement the arms 30 of the platenframe ride back andforth on the sleeves 3, the shift rail being arrested in itsforward movement by the arms 41 contacting with screw stops 42 which are received in threaded openings in arms .43 which project throu h the top-plate 1. A pointer 44 is carried by a bracket45 secured to the shift rail by screws 46, the ointer cooperating with the carriage sca e 47 connected by screws 48 to the front bar 27 of the platen frame.

The dog rocker 10 is actuated in the usual manner, a depending link 49 being pivoted thereto-at 50 and connected to a universal bar which is actuated at each printing movement of a finger key. During theordinary printing operation each depression of a finger key causes the free end of the dog' rocker to be depressed, thereby moving the dog rocker from the position shown in Fig. 6, releasing the loose dog 7 from the rack and bringing the'fixed dog 6 into engagement with the same tooth'which was engaged, by the dog 7 so that the feed-rackand thecarriage controlled thereby are not fed at the The release of thedown stroke of the key. loose dog in the manner, described enables the spring 11 to force it f01WtL1'(l,-3S in Fig. 5, in positionto coiiperate \vitlrthe next advancing tooth of the feed rack on th' e-retiirn of the dog rocker. When pressure on the receive tension of its spring 21 and the loose dog will "engage theadvancingtooth of the feed .rack and thepressure of the carriage spring will overcome the tension of the spring 11,

thus feeding the carriage forward a letter space distance and restoring the loose dog to the position shown in Fig. 6. During the reverse or backward movement of the carriage the beveled edge of the loosedog will cooperate with the beveled edges of the teeth. on the feed rack and the feed dog 7 will at this time ride freely over the teeth of the feed rack, the dog rocker at this time'moving around the axis of the spindle 16 as a center, as indicated in Fig. 5. A carriage release key 51 is connected to a bar 52 which carries forwardly extending bracket arms 53 pivoted on screw pivots 54 to the arms 4 of the truck. A depression of the release key 51 will swing the bar 52 rearwardly about its pivots 54 against a-screw stop 55 carried bythe dog rocker and will thus force the dog rocker to turn around with the pivot .16, thereby dis-.

This rack a hand. controlled pivoted device or key 59 preferably made of sheet metal with a,

hook-like finger piece 60 thereon and-dependin sides 61. This pivoted device is 5 within the opening 35 in the front bar 27 oftheplaten frame, as shown in Fig. 1, and is pivoted at one end ,on.

a pivot rod 62 which extends across the opening 85 and throu h the depending side pieces 61 of the ivote device and is secured at its ends to t e bar 27. -An arm or finger 63 projects from the pivoted device or key 59 and is adapted to cooperate with a cross web laten frame, which bar 64' or bar 64 of the divides the left-land opening 34 from the center opening The finger 63 andthe bar 64 act as stops to limit. the upward swinging movement of the pivoted device as shown in Fig. 2. Laterally projecting fingers 65 are formedon the pivoted device 59 for cooperation with the-bar 27 ofthe platen frame to dimit the downward movement of the pivoted device as shown in Fig. 1. The

stop 58 h'ereinbefo're referred to is mounted on the rear depending side .61 of the pivoted device 59 and'is adapted to slide thereon in the direction of thetravel of the carriage.

A headed screw 66 extends through a slot 67 in a slidable plate like member or carrier 68' i from one end of which the stop 58 depends,

and said screw limits the sliding movement of the stopon the pivoted device 59. The left-hand end of the carrier 68 is supported of'the feed rack and will en on the pivot rod 62, the carrier being cut out at 69 for this purpose. A laterally projecting pinTOextends from the carrier and a contractile spring 71 is connected at one end to said pin and is connected at' its opposite end to a depending ear 72 formed on the device 59. A spring 7 3 surrounds the pivot rod' 62 and bears atone end against the bottom of the pivoted device and at its opposite end against the cross bar or web-64 of the platen frame, thus tending to maintain the pivoted device, and the stop carried thereby, in the normal position shown in Fig. 2.

From the foregoing description it will be understood that the pull of the spring 71 is exerted to draw the stop 58 to the limit of its movement towards the right on the pivoted device or key 59, as shown in Fig. 2, and that the pin and slot or sliding connection between the stop .58 and its key 59 constitutes a lost motion connection.

in Fig. 2 to that of the mechanism the operator may grasp the hook-like portion 60 of the pivoted device, pressing it down around its pivot .62 from the position shown indicated in Fig. 3, thereby forcing the nose of the stop'or pawl 58 into engagement between twoof the teeth on the rack 56. The operator may then exert a In the operation pressureon the carriage from left to right This pressure may be exerted at the termination of the downward movement through the hook-like part 60, so that one hand of the operator may be employed to eflect, by one motion, both the pivotal downward movement. of the pivoted device to engage the stop members and to inove the carria e to the right. Or, if desired, the other hand of the operator may be employed to move the carriage to the right in the usual manner while the pivoted deviceis maintained depressed with the other hand. The effect of the movement of the carriage towards the right in the manner described is to move the carriage for a limited distance relatively to the stop 58 while the latter is held in engagement with it coiiperating rack 56. The parts thus far shown and described are so construct'ed and arranged that this movement corresponds to a letter space movement of the carriage, although this distance may be varied by changing the extent of motion between the carriage and the stop 58, as, will hereinafter more clearly appear. During the movement of the carriage to the right in the manner described. the teeth of the feed rack 5 will deflect the loose dog out of engagement. therewith, moving the carrier around the axis of its pivot 16. The extent of right-hand movement of the carriage is sufficient to move the feed rack 5'the distance between two teeth thereof so that the loose dog will be disengaged from one tooth age the next tooth to'the left thereof when t e right-hand movement of the carriage is arrested or when the carriage has moved from the position shown in Fig. 3 to that indicated in Fig. 4 and the engagement thus effected will retain the carriage in the position to which it has been moved baekwardly. On reference to these figures it will be seen that the printing point on the platen is at the point 35 on the carriage scale before the movement takes place and is at the point at on the carriage scale after the movement has been effected. If pressure at this time is withdrawn from the pivoted device, it will be restored by its spring 7 3 to the normal position, shown in Fig. 2, and the carriage will be arrested at 34 on the carriage scale by reason of the feed dog 7 being again'in engagement with the feed rack 5.

From the foregoing description it will be understood that the downward movement of the pawl or stop 58 into engagement with its cooperating rack or stop member 56 has no effect upon the carriage but is merely effective to'abring-the stop or pawl 58 into cooperation with the rack and that the movement of the carriage from left to right after this engagement takes place is effected by an independent pressure applied to the carriage either through the fin er piece 60 or in any desirable manner. ifter the pawl 58 has engaged its cooperatin rack 56 and the carriage has been moved re atively thereto a letter space distance to the right, a disengagement will allow the restoring spring 71 to force the pawl 58 to the right and back to its nor.- mal position shown in Fig. 2, one letter space distance. tion to afiord another letter space movement of the carriage to the right when it is again depressed and the carriage is moved to the right. In this fnanner the carriage may be stepped .backwardly to the right a letter space distance at each depression of the pivoted device 59.

I have shown another and preferred form of my device in Figs.'7, 8, 9 and 10 of the drawings, wherein the as those hereinbefore referred to except that thepawl 58 and carriage may have .a. relative movement of a plurality of letter space distances, means being provided for controlling at will the extent of this movement to the distance of one or more letter spaces. In the present construction a relative movement of either one or two letter space .dis-' tances between the pawl, 58 and the carriage may be affordetL- although it should The pawl is then in posi-- parts are the same understood that the number of letter space distances which the pawl or stop 58 and the carriage may move relatively to each other may be varied as desired. The slot 74 in the carrier 68 for the stop 58 is long enough to afford a double letter space movement of the stop, and headed screw- 66 passes through the slot and takes'into a threaded opening in the side 61 of the pivoted device or key 59. The pivot 62 for said device constitutes a support for the lefthand end-of the carrier 68 as in the device .previously described and also constitutes a end to a screw pivot 80 which projects latershoulder 77 on the carrierof 'the stop double letter space movement of the between the stop 58* exerted upon the carria ally from the stop 75. A spring 81 surrounds the pivot rod 62 and bears at one end against the cross bar 64: and at its other end 82' against the under side of the stop 75, thus tending to force the free end of the stop upwardly to the position shown in Fig. 8-

where it is adapted "'to co-act with the and limit the movement of the stop towards the left. The carrier for the stop 58 is connected to a sprin 71 as in'the'construction heretoforedescri ed. Should theoperator desire merely to secure a single letter space movement at each depression of the pivoted device 59, it is merely necessa'ryto' actuate said device in the manner hereinbefore described in connection with the construction shown in the. preceding figures. If, however, the operator should desire to secure a carriage to the right, at each depression of the pivoted device 59, it is necessary to depress the key or finger piece 78' at'the same time that the pivoted device 59 is depressed, thereby removing the stop 75 from the path of the shoulder 77 so-that the relative movement andthe carriage will betwice the extent of that afforded when the sto'p 75 is in the obstructing position shown in Fig. 8. When the stop '75 is removed from the path'of the shoulder 77 and thepivoted device 59 is depressed to they operative position'shown in Fig. 7, pressure ge fromleft to right will'force the carriage independently of the stopdevice 58 and its cooperating rack a distancecorr'esponding to two letter spaces and the stop 75 will be moved with the car-- 'riagejbeyond the shoulder 77, as shown in Fig4 7. "This double letter space movement given-to the carriage will cause the feed rack to move a distance correspondin to two of its teeth and the. loose dog wil rengage has been eifected and will hold the carriage against the tension of its spring in the tion to which it has been moved;

From the foregoing description it will be understood that the stop. device or pawl 58 posi- (or 58*) and the rack '56, which may likewise be regarded as a step-by-step'device,

constitutes normally out of cobperative relation and do,

not interfere with the movement of. the carriagein either direct-ionnor do they affect the escapcment mechanism !of the machine but theymay be brought into coiiperation at any point in the travel'of the-carriage and that the pin andslot connection between the pawl 58 (or 58?) and the key or pivoted device 59 which carries it constitutes a lost I motion connection betweenithe stop and its carrier which aflords a step-by-step backward movement of the carriage.

by LettersPatent, is

1. In a typewriting machine, the combi- What I claim as new and desire .to secure means independent of the'escapement mechanism of the machine for limit-v.

nation of a carriage, feed devices for afford ing a step-by-step feed of the carriagefrom right to left, and stop devices inoperative to move the carriage but effective for limiting step by step retractive movements thereof when said stop devices arebrought into engagement and a backward pressure isthen applied to the carriage, said stop devices being cooperative at any point in the travelof the carriage. v

2(In a typewriting machine, the combination of a carriage, feed devices for affording a step-by-step feed of the carriage from right to left, and stop devices inoperative to move the carriage but effective for limiting step by step retractive movements thereof, said stop devices being coiiperative at any point in the travel of the carriage and being arranged for engagementbefore backward i 115 pressure is appliedtoithe carriage. v

3. In a typewriting machine, the combination-of a carriage, escapcment mechanism therefor, a key actuated engaging member independent of the escapcment mechanism and carried bythe carriage, a coiipera'ting engaging member carried by theframe of. the machine, said members being inoperative to move thetcarriage but adapted to be brought into engagementby an actuation of the key'actuated member at any point in the travel of the carriage, and means for-affording a predetermined extent of retractive movement of the carriagerelative to said tennation ofa carriage, escapement mechanism therefor, a stop member carried by the carriage, a cooperating stop member carried by the frame of the machine,.said stop members being independent of the escapement'mechanism and adapted to be brought into cooperative engagement at any point in the travel of the carriage, and a lost motion connection between one of said engaging members and the part that carries it, said lost motion connection affording a retractive movement 'of the carriage"independently of said stopmembers fora predetermined eX- tent from any point in thetravel of the carriage when it retractive pressure is applied to the carriage.

5. In a typewriting machine the combination of a carriage, escapement mechanism. therefor, a stop inoperative to move the carriage, a cooperating rack, said stop and rack being independent of the escapement mechanism, and means for affording a predetermined extent of movement of t me of said stop andrack members on its support for the purpose of limiting the retraptive movement of the carriage when presspre is separately applied thereto:

' (3. The combination with .the "paper car-' riage of a-typewriter, of a platen, a shift. rail therefor, a rack connected with the shift rail, 'a movablestop inoperative to move the carriage, and'means for causing the engagement between said stop and rack for the purpose of limiting the retractive movement of the carriage and leaving it in a position one or more letter spaces nearer the begin ning of theline than it was before the engagement between the stop and rack and the retraction of the carriage occurred.

. .7. In a typewriting machine, the combination of a carriage, escapement mechanism therefor, a stop member, carried by the car riage and independent of said escapement mechanism, a cooperating sto member carried by the frame of the machine, said stop members being inoperative to move the carriage and'normally out of cooperative relation but adapted to be brought into cooperation at ,any point in the travel of the carriage, means for affording a lost motion between one of said stop members and its support to afford a step-by-step backward feed of the carriage.

' 8. In a typewriting' machine, the combination of a carriage, letterspacing mechanism therefor, and back-spacing mechanism independent of said {letter spacing mechanism for atfordinga'step-by-step back feed of the carriage, said back-spacing mechanism comprising a stop carried by the carriage a cooperating stop carried by the frame of 't 18 machine, said stops being inoperative to move the carriage and normally out of cooperative relation but adapted to be brought into cooperation at any point in the travel of the carriage, a lost motion connection between one of said stops and the part that carries it, and a spring for restoring said last mentioned stop to its normal position relatively to the part that carries it.

9. In a typewriting machine, the combination of a carriage, letter spacing mechanism therefor, and back spacing mechanism independent of said letter spacing mechanism for affording a step-by step back feed of the carriage, said back-spacing mechanism comprising a stop carried by the carriage, a cooperating stop carried by the frame of the machine, one of said stops being in the nature of a rack and the other be- "ing in the nature of a pawl, said stops being inoperative to move the carriage and normally out of cooperative relation but adapt- -ed to be brought into cooperation at: any

point in the travel of the carriage, a lost motion connection between one of said stops and the part that carries it, and a spring for restoring said last mentioned stop to its normal position relatively to the part that carries it. I

10. In a typewritingmachine, thecombination ofacarriage, letter spacing mechanism therefor, and back spacing mechanism independent of said letter spacing mechanism for affording a step-by-step back feed of the carriage, said back-spacing mechanism comprising a stop carried by the carriage, a cooperating stop carried by the frame of the machine, one of said stops being in the nature of a rack and the other being in the nature of a pawl, said stopsbeing inoperative to move the carriage and normally out of cooperation, a key for bringing said travel of the carriage, and a lost motion con nection between one of said stops and th part that carries it.

11/ In a typewriting machine, the combination of a carriage, letter spacing mechanism therefor, and back spacing mechanism inde endent of said letter spacing mechanism or affording a step-by-step back feed of the carriage, said back-spacing mechanism comprising a stop carried by the carriage, a cooperating rack carried by the frame of the machine, and a'lost motion connection between said stop and the part that carries it so that the carriage may move independently of said stop.

12. In a typewriting machine, the combination of acarr'iage, letter spacing mechanism therefor, and back spacing mechanism independent of said letter spacing mechanstops into cooperation at any point in the key, a lost motion connection between said tending to maintain a normalrelation be which said stop cooperates to limit the backward movement of the carriagewhen an engagement is effected between said stop and rack, the extent of lost motion between the stop and key determining the extent of' backward movement that may be given to the carriage at each-operation;

'13, In a typewriting machine, the combination of a carriage, letter spacing mechanism therefor, and back spacing mechanism for affording a step-by-step back-feed-of-the carriage, said back-spaeing mechanism comprising a keycarried by the carriage, a stop carried by said key, a lost motion connec; tion between said stop ,andtkey, a spring tween said stop and key,- and a rack carried by the frame of the machine and with which said stop cooperates to limit the b ackf ward movement of the carriage when an engagement is effected between said stop and 25- rack, the extentof lost motion between the stop and key determining-the extent of backward movementthat may begiven to they carriage at each operation.

14. In "a typewriting machine, the com;- bination of a carr1age; a platen carr ed thereby, a shift rail for said platen, carriage feed mechanism and back spacing mechanism, said backspacing mechanism comprising a key carried by the carriage, a stop, a lost-motion connection.between said stop and key for affording a backward-movef ment of the carriage, and a rack connectedwith said shift rail and with which the stop is adapted to be brought into cooperation at any point in the travel of the carriage 15. In a typewriting machine, the combination of v a carriage; a- .platen carried thereby; a shift rail for said platen; car riage feed mechanism; and back spacing mechanism,'.said backgspacing mechanism comprising a pivoted key carried by the carriage, a stop, a sliding jconneetion between said stop and key for affording a backward movement ofthe carriage, a spring for restoring-the sliding stop to normal position on the pivoted key, and a rackcarried by. said shift rail and with which thestop is adapted to be brought into cooperation at any point in the travel of the Icarria e.

-16. In a typewriting maehine,'-t e combination of a "carriage; "a platen adapted to be shifted for upper and lower case writing; ,a shift rail for said platen;- carriage feed mechanism; and back-spacing mechanism for affording a step-by-step backward feed' of the carriage, said baek=spacing mechanism-comprising a pivotedspring restored 'key -carr1ed by thecarriage, a stop', -a sliding connection between said ,stop and key for affording a backward movement of the;

cereals sang for restoring the sang 2 stop m Position: on the pivoted key, ands-rack ne e hsaid shift-rail and bination of a carriage, a stopmember carried by the carriage, a" cooperating stop member carried by the frame of the ma- 'chine, said stop members being normally out of cooperative relation and adapted to be' brought into cooperation at any point in the travel of the carriage, means for afiording.

a lost motion between one of said stop'members and its support ,to afford a step-by-step backward feed of the carriage,"and means for varying the extent of said lost motion.

'18; In-a typ'ewriting machine, the combination of. a carriage, .a stop. member car ried by the carriage, a cooperating stop =membercarried by the frame of the machine, saidstop members being'normally out of cooperative relation but adapted to be brought I into cooperation at any point'in the travel of the-carriage, meansfor affording a. lost motion between one of said stop-membersand its support to afford a stepby -step backward feed of the carriage, and hand controlled means for affording. different extents of lost motion as may be desired.

-19 In a typewriting 'machine,;ljthe com: bination of a"carriage, a stop member car-,' ried. by the carriage, a cooperating stop member carried by the frame of the machine, 3

said stopmemberslbeing normally out of co operative relation but adapted. to'be brought; r

intocooperation at any point'in the travel of the carriage,-means for affording a lost motion between; one of said stop members and its support to; afford" a step by step sing'le letter space backward feed of the carriage, and hand controlled means for in' creasing the extent oflost motion at will.

201 Ina typewritingmachine,,the combination of a carriage, a stop member carried' by the carriage, a cooperating stop it lost'motion at will. a

21,-In 'a typewriting machine, the combination' of a carriage, 1a stop member car. 'ried by the carriage, a cooperating stop mm-ber carried by the frame of the machine,

said stop members being no out of coriage, and spring restored key actuated I means for affording an i ncreasedf extent -of' "1 operative relation but adapted to be brought into cooperation at any point in the, travel of the carriage, means for affording a lost motion between one of said stop members and its support to afford a step-by-step backward feed of the carriage, a movable limiting stop normally in the path of the. lost motion stop member, and means for moving said limiting stop out of the path of said lost motion .stop member.

22. In a typewriting machine, the combination of a carriage, a stop member carried by the carriage, a cooperating stop member ca'rriedby the frame OftllfijlllitClllllQ, said stop members being normally out of cooperative relation but adapted to be brought into cooperation at'any point in the travel of the carriage, means for affording a lost motion between one of said stop members and its so port to afford a step-by-step backward fee of the carriage, a pivoted spring restored limiting stop normally in the path of the lost motion stop member, and a key connected (to said limiting stop to move it gut of the path of the 10st motion stop mem- 23. In a typewriting machine, the combination of a carriage; letter spacing mech-' anism therefor; and back spacing mechanism for affording a step-by-step back feed of the carriage, said back-spacing mech-' anism comprising a stop carried by the carriage, a cooperating stop carried by the frame of the machine, said stops being normally out of cooperative relation but adapted to be brought into cooperation at any point in the travel of the carriage, a lost motion connection between one of said stops and the part that carries it, a spring for restoring said last mentioned stop to its normal position relatively to the part that carries it, and a hand-controlled movable limiting stop normally in'tlrepath of that stop which 7 ha s alostmotionconnection, whereby the extent of lost motion may be varied.

- 24:. In atypewriting machine, the combination of a carriage; letter spacing mechanism therefor; and back spacing mechanism for affording a step-by-step back feed of the carriage, said back-spacing mechanism comprising a stop carried by the carriage, a cooperating 'rack' carried by the frame of the machine, a lost motion connection between said stop and the part that carriesit, and means for varying the extent of movement afforded by said lost motion connection.

25. In a typewriting machine, the combination of a carriage; letter spacing mechanism therefor; and back spacing mechsaid stop andtkey, means for varying the extent of lost motion between said stop and key, and a rack with which said step coiipcrates to limit the backward movement ofthe carriage when an engagement is effected bet-ween said stop and rack, the extent of lost motion between the stop and key determining the extent of backward movement that may be givento the carriage at each operation.

26. In a typewriting machine, the com-- mg the extent of lost motion between said stop and key, and a rack carried by the frame of the machine and with which said stop cooperates to limit the backward movement of the carriage when an engagement is effected between said stop and rack, the extent of lost motion between the stop and key determining the extent of backward movement that may be given to the carriage at each operation.

27. In a typewriting machine, the combination of a carriage: a platen carried thereby; a shift rail for said platen; carriage feed I mechanism; and back-spacing mechanism, said back spacing mechanism comprising a key carried by the carriage, a stop, a lost motion connection between said stop and key for affording a backward movement of -thecarriage,means for varyingthe extent of lost motion between said stop and key, and a rack connected with said shift rail and with which the stop is adapted to be brought into cooperation at any point in the travel of the carriage.

28. In a-typewriting machine, the combination of a carriage; a platen carried thereby; a shift rail for said platen; carriage feed mechanism; and back spacing mechanism; said back spacing mechanism comprising a pivoted key carried by the carriage, a stop, a sliding connection between said stop and key for affording a backward movement of the carriage, means for varying the extent of lost motion between said stop and key, a

spring for restoring the sliding stop to normal position 011 the pivoted key, and a rack connected with said shift rail, and with which the stop is adapted to be brought into cooperation at any point in the travel of the carriage.

29; In a typewriting machine, the combination of a carriage; a platen adapted to be shifted for upper and lower case writing; a shift rail for said platen; carriage" feed mechanism; and back spacing mechan-' ism for affording a step-by-step backward feed of the carriage, said back spacing mechanism comprising a pivoted spring restored 3 key carriedby the carriage, a stop, a sliding carriage to maintain the stop fixed while the carriage. receives a backward movement for a predetermined extent.

Ina typewritingmachine, the combination of a carriage; letter spacing mec'han ism therefor; and back spacing mechanism for affording a step-by-step backward feed of the carriage said back spacing-mechanism comprising a key, a stop carried by said key, a lost motion'connection between said stop and key, a second key carried by said first mentioned key, a regulating stop controlled by said second key and cooperating with said first mentioned stopto limit its -movement, and a stop member that cooperates-with said first mentioned stop to limit 4 the backward n'iovenlent of the carriage.

I nation of a carriage; letter spacing mechan lsm therefor; and back spacing mechanism 31. In a typewriting machine, the combifor aifording a step-by-step backward feed of the carriage, said back spacing mechanism comprising a key,a stop-carried by said key, a lostvmotion connection between said stop and key, a second key carried by said first mentioned key, a regulating stop controlled by said second key and cooperating-with said first mentioned stop to vary'the extent of lost motion between said first mentionedl stop and its key, and a'rack withwhich said first mentioned stop cooperates to limit the backward movement of the carriage.

. 32. In a typewriting machine, the combination of a carriage; and back spacing mechanism therefor; said back spacing mechanism comprising cooperating stop members that are adapted to be brought into cooperation at any point in the travel of the carriage to afford a step-bystep. backward movement of one or more letter spaces as may be desired at each actuation, and keys cooperating with said stop members, one of said keys controlling the stop members to afford a single letter step-by-step backward feedtof the'carriage and the other key being operable to afford a movement of the carrlage for a plurality of letter-space, distances at each step-by-step feed.

33. In a typewriting machine, the combi: nation ofa carriage; and back spacing mechanism therefor, said back spacing mechanism comprising ,a rack, cooperating stop members, one of said stop members being adapted to be brought into cooperation with the rack at any point in the travel of the carriage to afford a step-by-step backward movement' of one or more letter spaces as maybe desired at each actuation, and keys cooperating with said stop members, one of said keys controlling the engagement of one of said stop members with the-rack to afford a single letter step-by-step backward feed of the carriage and the other key, co-acting with the other stop member to afiord a movementof the carriage for a plurality of letter space distances at each step-by-step feed.

Signed at the borough of Manhattan, city of New York, in the county of New York, and State of New York, this 17th day of April A. D. 1906. r WALTER J.v BARRON. Witnesses:

E. M. WELLs, M. F. HANMOEBER.

Images