US1290387A - Type-writing machine. - Google Patents

Description

J. A. B. SMITH. TYPE WRITING MACHINE. APPLICATION FILED APR.28. 1912.

Patented Jan. 7, 1919.

3 SHEETSSHEET I.

J. B. SMITH. TYPE WRITING MACHINE. APPLICATION FILED APR. 28. I917.

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UNITED sTA rEsrnrENtr OFFICE.

JESSE A. B. SMITH, OlE STAMFORD, CONNECTICUT, ASSIGIEDB TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N.

Y., .A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

- Specification of Letters Patent.

The inventlon 1s herein disclosed as apto an Underwood typewrltmg map y chine, modified somewhat along the lines of the patent to Wernery .& Smith, 1,132,055. The machines disclosed in said patent are capable of writing upon what is known as a fan-fold Web, which is so folded as to make several thicknesses of work-sheets which af V terward can be separated.

Such a fan-fold web has the great advantage that headings, etc., printed thereon are positively held in alinement with each other upon the several plies even when feeding around the platen, because each web is bound to the two adjacent lwebs by the integral edges at the fold, and these prevent either ply of the fan-fold sheet-from feeding faster than the others.

- The present invention includes devices which are adapted to retain many of the advantages of said patent, and at the same time enable separate webs orplies to be used with facility, thus permitting one web to be of one color or quality of paper, while the other webs may be of different qualities or colors.

In the form of the invention herein disclosed, the carriage of the typewriter is in many respects like that in the patent re ferred to, and-includes a carbon paper carriage which is adapted to be moved forwardly and backwardlly, along the usual typewriter carriage. h owing to their weight, are usually mounted upon stationary supports,'so that the typewriter carriage is relieved of the strain or driving them. The rolls, which deliver the webs to the typewriter carriage, are according to thepresent improvements placed so that before reaching thetypewriter' carriage, the webs are'free of tension or are unsupported for quite'a distance, thus allowing the e webs of paper,

typewriter carriage to travel almost unimpeded by the webs, because the'space over whi h' the .webs are free oftension enables the web's to twist freely and idly in that.

space. Instead of being actually unsupported, the webs may lie for a part or all of the distance upon-a flat table, which permitsthem to slide or swerve sidewise at will.

Owing to the fact that the paper forming the webs has some thickness, and that this thickness at the platen-is materially increased by interleaved carbon papers, the

outside web normally would tend to travel- Patented Jan. '7, 1919..

considerably faster around the platen than the inside web, with the result that if the forms printed on the different webs register 1 when the leading "edges of the webs are first mserted into the typewriter, they very soon cease to register because the outside web travels faster than the inside web. M

The present invention is adapted'to overcome this difliculty, by causingthe webs to be positively united-to each other while the platen is being used for writing. This may beefi'ected by putting a clamp on the carbon paper carriage of the patent aforesaid, said clamp being adapted to positively grip the webs together during the forward feeding of thewebs in the act of feeding, but capable of being released by the typist when the carbon paper carriage. is pushed rearwardly.

The invention may also include a connection to the carbon 'paper carriage, such that when pushed rearwardly, the carriage will unwind practically the full length of a' form from the webs, so that the subsequent line-spacing operation in filling out the forms, will not throwupon the .line-space lever the load of unwinding the webs. This also h the advantage of producing some slack in the webs whichserves to diminish the side twisting of the .webs which ensues from the travel of the typewriter carriage.

It is convenient to connect the clamp on the carbon paper carriage, which positively holds the webs with an analogous clamp which is adapted to seize the webs and un- .wind them from their-rolls, thus simplify ing the structure and at the same time co ,ordinating the parts, so that the advantageous slack is produced at the proper time.

Certain features herein disclosed are covered by divisional application No. 242,734,, filed July 1, 1918; but the claims herein are limited to combinations not disclosed in said divisional application.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a perspective view, largely broken away, showing the invention as applied to the machine of the aforesaid patent.

Fig. 2 is a sectional side view of the same, with the parts set for beginning to fill out a fresh form.

Fig. 3 is a sectional side view, showing the webs stretched out straight, and the carbon paper carriage clamp released, just at the moment of starting to push the carbon paper rearwardly, preparatory to bringing anew form to the printing point.

Fig. 4 is a View similar to Fig. 3, but shows the carbon papercarriage clamp released at the end of its rearward movement.

In the Underwood typewriting machine, types 1 at the outer ends of type-bars 2 strike agalnst the front side of a rotatable platen 3 in a carriage 4. The platen 3 is rotated by means of a knob 5, mounted on a stub axle 6, or by the line-space lever .7, which is adapted to drive rearwardly a slide 8 effective on the line-space detent wheel 9. The platen is mounted in a swing frame 10, which is journaled on a front axle 11, in such a way, that as the swing frame 10 is thrown upwardly and forwardly, the platen swings therewith, but 1s constantly kept engaged with the line space mechanism because a pinion 12 fast to the end of\ the platen axle, remains in mesh with a pinion 13 fast on the shaft 11, and the pinion 13 is also in mesh'with a pin ion 14 fast to the stub axle 6. When the swing frame 10 is swung up, the platen occup 1es the position seen in Fig. 3, in which pos t on webs 15, 16 and 17 may be drawn practlcally straight from the rear of the machine under the platen to have their leading ends ga ed by an adjustable outer end gage 18.

fter being thus drawn forward and gaged by abutting them against the bottom of saidgage 18, the webs are usually cut off. This is done after the platen 3 is swung back to its normal position, there being provided for this purpose a knife 19, adjacent the front of the machine. The usual front and rear. feed rolls 20 and 21 hold the webs 15, 16 and 17 against the platen, during the severng operation while the platen is latched in its downward normal position by the'usual latch 22, which is swungvforward by ha spring 23, so that it catches over a pin 24 on the handle 25., which is provided for swinging the swing frame 10 upward and forward.

As the webs 15, 16 and 17 are fed forward for the purpose of writing on them, they draw with them interleaved carbon sheets 26 and 27, which 'areclipped to the usual crossbars 28 projecting from the opposite sides of a carbon carriage29, common in this type of machine. The carbon paper carriage 29 runs on rolls 30, which roll on rails 31 fast to the typewriter carriage, said rails being united by a cross-bar 32 attheir rear ends, thus forming a frame which includes a Wheel 33, traveling on a rear rail 34. At the front end the rails are fast to brackets 35 on the typewriter carriage adjacent the usual rear carriage rail 36. When the webs 15, 16 and 17 are stretched out flat in the manner shown in Fig. 3, the carbon paper carriage 29 is usually pushed rearwardly by a handle 37, so as to shift the carbon paper sheets 26 and 27 back to the osition seen in Fig. 4, in which position t e carbon paper sheets are clear of the knife 19, with the result that the carbon paper sheets remain intact while the webs are being later torn off.

In order to properly aline the webs, there are provided on the swing frame 10 adjustable edge ages 38, formed asthe turned-up edges of p ates 39, which lie on the table 40. Besides the edge gages 38, there are also provided edge gages 41 adjustably mounted on the carbon paper carriage 29, these latter edge gages serving to guide the webs straight as they approach the platen 3.

The webs as herein shown are drawn from three spools 42, 43 and 44, which are journaled onspindles in a suitable fixed frame 45. As herein illustrated, these spools are beneath the typewriting machine and may be conveniently placed near the floor, under whatever table the typewriting machine is mounted on for the time being. From the spools 42, 43 and 44, the webs are led past guides 46 from which they extend in a straight clear reach to a second set of guide 47. The reach from 46 to 47 may be equal to or greater than the travel of the carbon paper carriage 29, for reasons which will presently appear.

From the guides 47, the webs rise and turn forwardly over the rod or bar 32, which, therefore, may if desired be several feet vertically from the guide 47, thus making any twisting of the webs, between 47 and 32, (due to travel of the type-writer carriage) of negligible effect on the webs from the rod 32 forward to the platen 3.

In order to cause the webs 15, 16 and 17 to maintain successive forms printed on each web in register with those on the other webs, the webs are positively clamped together, preferably by pressing them down upon the carbon-paper carriage 29, with the result of counteracting the tendency. of the outside web to feed around the platen faster than the inner one. There is provided on the carbon paper carriage a clamp 48 adjacent each side of the Web, to positively grip the plies.

- For this purpose'the clamp may include two members or jaws 49 and 50. The member or jaw 49 may be mounted on a rock arm 51 fast to a shaft 52, said shaft also carrying a second rock arm 53, which carries a pin 54, riding in an arcuate cam opening 55 in a plate or member in the form of a segment 56, so that swinging'the' segment forward, cams the pin 54 down, thus, locking the the finger-piece 57 and the cam plate 56 inshaft .61 to swing said shaft to cause the clamps 48 to become effective to .bind "the clude a rearwardly extending link 59, pivoted to the finger-piece 57 at its forward end, and pivotedat its rear end to a rock arm 60, forming part of bell crank 62, fast on a shaft 61, to which shaft said segment 56 is likewise fast; When the handle 37 is pushed to movethe carbon sheets 26 and 27 rearwardly, the typist pulls the finger-piece 57 forwardly on the handle 37, thus freeing the clamp 48. This swings upward an arm .of bell-crank 62, permitting a latch 64 to be drawn by a spring 65 under therear arm 66 of the bell crank, thus latching the fin erpiece in its forward position, and there ore holding the clamp 48 unlocked.-

The typist then pushes the carbon paper carriage 29 rearwardly to the position'seen in Figs. 2 and 4, thus drawin the carbon sheets 26 and 27 to a point behind the knife 19. At this time a tail 67 of the latch 64 projecting downwardly below the pivot 68 thereof, strikes against a stop 69 fast on the left-hand rail 31, thus causing the latch 64 to free itself from the bell crank 62, thereby permitting a spring 70 coiled around the webs together. The stop 69 arrests the'carbon paper carriage 29, and. may be adjusta'bly fastened at any point on it s'rail 31 to suit the work in hand. For this purpose it is held to said rail by a thumb-screw ,71.

When the clamp 48 is engaged, as shown in Figs. 2 and 4, the webs 15, 16 and 17 posi tively grip each other, with the result that the headings printed on the webs 15, 16 and '17 will accurately maintain register each with the others.

In connection with the rolls 42, 43, 44,

there is provided a web-advancing clamp 72,

as part of a lower carriage 73, which is provided with rolls 74to run on rails75 extending rearwardly from the support 45. The clamp 72 may include jaws 76 and 77 like the clamp 48, and the clamp 72 is preferably in duplicate,'so that there is such a clamp 72 near each margin of the webs 15, 16 and 17. To operate these clamps together, they are mounted on a transverse shaft 78, which is provided with a rock arm 79 having a pin 80 working in a cam slot '81 in a plate 82. This plate is preferably connected to be operated in conjunction with the cam plate 56, and for this purpose may be connected tothe finger-piece 57 by means of a horizontal link 83 extending from a lower extension 84 of said finger-piece, said link 83 operating a rock arm 85 fast to the end of the shaft 86 at one side of the typewriter carriage. This rock arm operates the cam plate 82-by means of the rock shaft 86, said rock shaft having also fast thereto a second rock arm 87, which is joined by a link 88 to a rock arm 89 splined to a shaft 90 adjacent the shaft 94. The shaft 90 is journaled on brackets'91 forming part of the carriage 73, and operates the cam plate 82 by means of arms 92 and 93 on the shafts 90 94 respectively, said arms bein%joined by a link 95.

ince the cam plate 82 is fast on the shaft 94,.it will be seen that the finger-piece 57 may operate the segment cam plate 82 and 56in unison, in such a way that one is always effective. The carriage 7 3- has been described as running on fixed rails 75, while the carbon paper carriage 29 runs on the rails 31, which form part of the'typewriter carriage. In order to enable the. link "88, which connects the .clamps 48 and 72, to remain vertical despite the feeding of thetypewriter carriage sidewise past the lower carr1age73, the splined arm 89 is slidden along its shaft 90 by means of a stiff vertical bar 96 projecting downward from the carbon paper carriage and having at its lower end a fork 97 -.which-embraces the rock arm' 89,'thus causing said rock arm to slide along its shaft with the travel of the typewriter carriage.

When the carbon-paper carriage is pushed back with the clamp 48 released and there- :fore ineffective, the clamp 72 will be seizing the lower reaches of the webs 15, 16 and 17 between the supports 46 and 47, thus unwinding each web 15, 16 and 17 from its spools 42, 43 and 44 an amount precisely equal to the amount that the carbon carriage is pushed backward. This produces a bight 98 in the webs between the support 47 and entirely free of the lower clamp 72, and

hence the fprward movement of the carbon- 4 paper'car'rlage with the carriage 73 does not result in retracting any of the bight 98 over the support 47, that is, tothe right at Fig; 2. During such forward movement of the carbon carriage, the bight or slack at 98 is partly or wholly taken up, such. bight being replaced by the next rearward travel of the lower carriage 7 3. a

When the platen is in the .Fig. 3 position, the lowerclamps 72 will seize, if the typist pushes back the carbon-paper carriage at this time, with the finger-piece 57 in the Fig. '3 position. Thus a bight 98 is formed every time the carbon-paper carriage 29 is pushed rearwardly, and this bight-is gradually taken up by the line-spacing or other feeding of the webs around the platen. This pulling of the webs off from the spools, to produce the bight or slack 98, and the subsequent pulling forward of the webs by the platen 3, do not depend upon the clamp 48, 49, 50,Wl1lh may be omitted so far as these web-advancingoperations are concerned. The function of said clamp 48, 49, 50 is not to advance the web. In fact, said clamp is itself pulled along by the web. If this clamp is used, it maybe aided by the clamp 76 in keeping the plies in register, but said clamp 76 also performs the important function of drawing the plies off from the spools, to produce the desired slack at 98, to accommodate the web to the travel of the typewriter carriage members 4, 31. It will be usually found advantageous to adjust the .webs at the beginning in such a way that thereis an initial extra bight between 47 and 32, this bight, of course, being much greater when the carbon paper carriage carries the lower carriage 73 rearwardly than it is at other times.

. There may be rovided a table 99, which extends rearward y from the support 47, and

is preferably either entirely without sides,

except immediately adjacent tosupport47, or has such low sides that the bight 98 can shp over the sides ofv the table. The table may be formed from two plates of sheet metal, each slidable on, and embracing a lower rod 100, andhaving a sleeve 101 sliding on an upper rod 102, the rod 100 and 102 forming the support 47. The rear end of the plates forming the table 99 may be bent downward, as seen in Fig. 3, so that when the Web is drawn rearwardly by the clamp 72. it will form a bight, slack or supply which at first will lie on thetable 99, but which will be gradually taken up in the line-spacing operation during the typewriting or filling in of the various blanks on the Web work-sheet. The plates forming the table 99 may have their edges turned'up at 103' to form ears on which thesleeves 101 are. mounted. These ears form edge guides for the webs 15, 16 and 17, but the ears are preferably cut off close to the rod 100, so that the edge guides formed thereby are extremely short, thus allowing the webs to slip sidewise or twist on the table 99. p

In order to keep the weight of the webs the table 99,

' the various plies 15, 16 and 17, between the supports 46 and 47, from drawing the bight of the web ofi thereby allowing the webs to sag down between saidsupports 46 and 47, the jaw 77 of each clamp 72 may be elevated above the plate 104 which forms the top of the carriage 73, and the jaws 77 may be cut off at the sides of the clamps 72 near the center, to make room for a fixed plate 105 lying between' the jaws 77 and extending beneath the webs 15, 16 and 17 to support them throughout their length between the supports 46 and 47. The plate 105 forms a table having an embraces the rod 100, and a second extension which embraces a rod 107, forming the'lower rod of the support 46. Thus it will be seen that the webs 15, 16 and 17 are supported horizontally throughout their length from the support 46 to the support 47, except at their margins which extend beyond the plate 105, and therefore can be. gripped by the clamp 72. The webs do not sag between the rails 31 because the usual supporting rods shown in the patent to Jesse A. B. Smith, N0.'1,177,546, not seen herein, support the 7 web where it does not rest on the car may draw the webs 15, 16 and 17 straight onto the platen without any twisting whatsoever if the typewriter carriage is positioned at the center of its travel. The typist, however, will often draw on the webs with the typewriter carriage positioned elsewhere than the center, thus tending possibly to some extent to twist the webs. In order to positively aline the webs at will, both as to twisting and to cause the forms printed on different Webs to register with each other, means may be provided whereby the typist can accurately register the webs at frequent intervals, independently of any other devices, thus avoiding the necessity of re-adjusting the other devices, especially if a narrow web is used temporarily. For this purpose, the webs are shown herein as provided with perforations at identically corresponding points 108, and the end gage 18 is provided with a tapered pin 109 of the same size as the perforations 108, so that the typist can draw the Webs out horizontally as shown in Fig. 4, and aline and realine the corresponding printed form on whenever required. this being accomplished by fitting the perforations 108 over-the pin 109, as shown in Fig. 4, after which the platen may be thrown back to the normal Fig. 3 pisition, as described above, The form WhlCh has already been typist to push written on, and which is just below the peroff while the finger of the typist holds thewebs-against the-usual smooth bar 110, to wh1ch the end gage 18 is held by the usual thumb screw 111. This bar 110 is usually grasped as a handle by the typist to throw. the platen up and down, thus forming a rest for the finger of the typist in holding the webs on the pin 109.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used Without others. Having thus described my invention, I claim:

In a typewriting machine, the combinatlon with a traveling carriage and a revoluble platen therein, of means for. feeding Webs to said platen, a clamp traveling at the introductory part of the machine adapted to securely hold superposed webs'together while fed to said platen, and. means for releasing said clamp to permit it to be pushed l'earwardly while the webs are at rest upon said platen. w e

2. In a typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of a device movable on said carriage for holding a carbon sheet,-

and a clamp forming part of said device adapted to positively hold together superposed -webs to prevent relative creeping while traveling to the platen.

3.- In a typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of a device movable on said carriage for holding a carbon sheet, a clamp forming partof said device adapted to positively hold together superposed webs to prevent relative creeping while traveling to the platen, a handle extending from said carbon sheet device forwardly, to enable'the typist to push the device rearwardly, and a finger-pieceon said handle for releasing said clamp.

4. In a typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of a device movable as .said carriage for holding a carbon sheet, a

clamp forming part of said device adapted to positively hold together superposed webs to preventrelative creeping while traveling" a handle extending from said carbon sheet device forwardly, to enable the the device rearwardly, a finger-piece on said handle for releasingsaid clamp, a latch for holding said clamp released, and a stop for arresting said carriage to the platen,

adapted to release said latch to cause said clamp to automatically seize the webs.

5. In a front-strike typewriting .machine, the'combination with a traveling carriage and a revoluble platen therein, of rails form- "ing part of said carriage, a carbon paper device running on said rails, a clamp on said device adapted to clamp webs together and including a clamp adjacent each margin of the web, a spring normally tending. to make said clamps effective, and a finger-piece for making'them inedective.

6. Ina front-strike typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of rails form ing part of said carriage, a carbon paper device running on said rails, a clamp upon said device adapted to clamp webs together and including a clamp adjacent each margin of the web, a spring normally tending to make said clamps efi'ective, a finger-piece for making them inefiectiv 'a stop embrac ing one of said rails for arresting said device, a latch for holding the clamps inefiective when made' ineffective by said fingerpiece, and connections whereby said stop releases said latch at the arrest of said carriage by said stop.

7 In a-front-strike typewriting machine, the combination with a traveling carriage and a .revoluble platen therein, of rails forming part of said carriage, a carbon paper device running upon said rails, a handle by which said device may be moved backward and forward, a finger-piece connected to said handle, a clamp for grasping webs adapted to be controlled by said finger-piece, a spring normallv making said clamp efliective, a rock shaft on which said clampis m0unted,1a rock shaft on which saidspring is mounted, a rock arm on said clamp shaft. and a-cam fast to said spring shaft adapted to rotate said clamp shaft to cause the clamp to positively seize. I 8. In a-front-strike typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of rails forming'part of said carriage, a device to which carbon sheets can be clipped running upon said rails, clamps mounted on the opposite margins of said device for gripping webs to cause the webs to travel together with the carbonsheets, and means for causing said clamps-to constantly tend to seize said Webs. 9. In a. front-strike typewriting machine,

- the combination with a traveling carriage and a revoluble platen therein, of rails formcarbon sheets can be clipped running upon i for holding said clamps released, and means for automatically releasing said latch when said device has moved its carbon sheets back to their proper position.

, 10. Ina typew'riting machine, the combination with a travelin carriage and a revoluble platen therein, 0 means for feeding -means for enabling webs to be accurately alined endwise, and a clamp forming part of said device and arranged 'at the intake side of the machine. adapted to positively hold together superposed alined webs to prevent relative creeping while traveling to the platen. V

12. In a-typewrit ing machine,'the combination with a traveling carriage and a revoluble platen therein, of a device movable on said carriage for holding a carbon sheet, means for enabling webs to be accurately alined endwise, a clamp forming part of said device adapted to positively hold together superposed alined webs to prevent relative creeping while traveling to the platen, a handle extending from said carbon sheet de- Vice forwardly, to enable the typist to push the device rearwardly, and a finger-piece on said handle for releasing said clamp.

13. In a typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of a device movable on said carriage for holdinga'carbon sh eet,

-means for enabling webs to be accurately alined endwise, a: clamp forming part of said device adapted to positi ely hold together superposed alined webs to prevent relative creeping while traveling to the platen, a handle extending from said carbon sheet device forwardly, to enable the typist to push the device rearwardly, a

finger-piece on said handle for releasing said clamp, a latch for holding. said clamp released, and a stop for arresting said carriage adapted .to release said latch to cause said clamp to automatically seize the webs.

14, In a front-strike typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of rails forming part of said carriage, means for enabling webs to be accurately alined endwise, a carbon paper-devicefrunningon said rails, a

clamp upon said device adapted-to clamp alined webs together and including a clamp adjacent each margin of the web, a spring shaft adapted to rotate said normally tending to make said clamps effective, and a finger-piece for making them ineffective.

15. In a front-strike typewriting machine, the combination with a traveling carria e and a revoluble platen therein, of mi s forming part of said carriage, means for enabling webs to be accurately alined endwise, a carbon paper device running on said rails,

a clamp upon said device adapted to clamp alined webs together and including a clamp adjacent each margin of the web, a spring normally tending to make said clamps effective, a fin er-piece for makin effective, a stop embracing one 0% said rails for arresting said device, a latchfor holding the clam s ineflective when made ineffective by said linger-piece, and connections whereby said stop releases said latch at the arrest of said carriage by said stop.

16. In ,a front-strike typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of rails forming part of said carriage, means for enabling webs to be accurately alined endwise, a carbon paper device running upon said rails, a handle by which said device may be moved backward and forward, a finger-piece-connected to said handle, a clamp for grasping alined websadapted to be controlledby said finger-piece, a spring normally making said clamp effective, a rock shaft on which said clamp is mounted, a rock shaft on which said spring is mounted, a rock arm on said clamp shaft, and a cam fast to said spring clamp shaft to cause the clamp to positively seize.

17 In a front-strike typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of means for enabling webs to be accurately alined endw se, rails forming part of said carriage, a device towhich carbon sheets can be clipped running upon said rails, the opposite margins of said device for grippingalined webs tocause the webs to travel clamps mounted on them into constantly tend to seize said web's.

18. In a front-strike typewriting machine, I

the combination with a traveling carriage and a revoluble platen therein, of means for enabling webs to be accurately alined endwlse, rails forming part of said carriage, a device to which carbon sheets can be clipped running upon said the opposite margins of said device for gripping alined webs to cause the webs to travel together, means for causing said clamps to constantly tend to seize said webs,- a fingerpiece for releasing said clamps, a latch for holding said clamps released, and means for automatically releasing said latch when said device has moved its carbon sheets back to 'theirproper position.

19. In a front-strike typewriting machine,

rails, clamps mounted on first clamping device but the combination with a traveling carriage and a revoluble platen therein, of rails forming part of said carriage, a clamping device webs are clamped thereto, and the other is released fromthe webs, and vice versa.

20. In a front-strike typewriting machine, the combination with a traveling carriage and a revoluble platen therein, of rails forming part of said carriage, a clamping device for holding webs positively together and running upon said rails, a second clamping device adapted to support webs fed to the first clamping device but allowing a free bight of webs therebetween, and means for connecting both said clamping devices so that when the first advances the webs, the webs are first clamped thereto, and the other is released from the webs, and vice versa, said second clamping device running upon fixed rails so that the typewriter car riage runs edgewise of the webs relatively thereto. I

21. In a 'typewriting machine,sthe combination with a traveling carriage including a revoluble platen, of a device slidable on said carriage, including a clamp to positively seize webs to cause the platen to feed said webs together, a spool support from which said webs are drawn, a second device for'seizing webs adapted to draw them from the spool support while positively holding them connected to each other, and connections whereby, when one clamp is effective, the other is ineffective.

22. In a typewriting machine, the combination with a traveling carriage including a revoluble platen, of a device slidable on said carriage including a clamp to positively seize webs to cause the platen to feed said webs together, a spool support, from which said websare drawn, a second device for seizing webs adapted to draw them from the spool support while positively holding them connected to each other, connections whereby, when one clamp is effective, the other is inefiective, a finger-piece for sliding said devices, and means for accurately alining the webs when released from a clamp.

23. In a typewriting machine, the com bination with a traveling carriage and a revoluble platen therem, of a clampsl-iding on said carriage for positively causing webs to feed together to said platen, acarriage supporting said clamp, ra1ls upon which said last-named carriage runs, a finger-piece 'for making said clamp ineffective, a spring normally tending to make it effective, a latch adapted to hold 1t meifectlve, and an extension of said latch adapted to strike a stop on one of saidtrails to release the latch.

24. In .a typewriting machine, the combination with a clamp, of a rock shaft on which one jaw of saidclamo is mounted, a

rock arm fast to said. rock shaft, a second rock shaft, a segment cam on said second rock shaft, a follower on said first rock shaft engaging said segment cam, a rock arm fast.

on said second rock shaft. a finger-niece for 7.5

drawing on said rock arm to rotate its shaft to make the segment effective to open the clamp, and a latch for holding the clamp released. 1

' 25. In a typewriting machine, the combination with aclamp, ofa rock shaft on, whlch one jaw of said clamp is mounted, a

rock arm fast to said rock shaft, a second 7 rock shaft, a segment cam on said second rock shaft, a follower on said first rock shaft engaging said segment cam, a rock arm fast on said second rock shaft, a finger-piece for drawing on said rock arm to rotate its shaft to make the segment effective to open the clamp, a latch for holding the clamp released, an extension of said latch, and a stop for automatically releasing said latch by said extension to cause the clamp to seize.

26.111 a typewriting machine, the combination with a clamp, of a rock shaft on which one jaw of said clamp is mounted, a

rock arm fast to said rock shaft, asecond rock shaft, a segment cam on said second rock shaft, a follower on said first rock shaft engaging said segment cam, a rock arm fast on said second rock shaft, a finger-piece for drawing on said rock arm to rotate its shaft to make the segment effective to open the clamp, a second clamp fast to a rock shaft of its own, another rock shaft for operating said second clamp, a segment cam fast on. said last-named rock shaft for operating it, a follower fast to the rock shaft of the second clamp operated by said second cam, a

rock shaft comprising a spline, an arm rid-1110 ing in said spline for operating said shaft, a link and rock arms connecting'said spline shaft and said segment shaft for causing them to turn together, a single finger-piece for operating them and' links extending from said finger-piece to operatesaid clamps through their rock arm connections.

27. In a typewrlting machine, the combination with a traveling carriage and a -revoluble platen, of a. clamp traveling on said carriage adapted to compel superposed webs to feed as a unit to said-platem a spool device on WhlCh said webs are wound, a sec- .ond clamp for drawing webs from the spool device and positively holding the webs alinejd with each other while being so drawn, and connections whereby when'one clamp is effective the other is ineffective.

-28. In a typewriting machine, the combination with a traveling carriageand a revoluble platen, of a clamp traveling on webs to feed as a unit to said platen, a spool device on which said webs are wound, a second clamp for drawing webs from the spool device and positively holding the webs alined with each other while 'being ,so drawn, said spool device being fixed, connections whereby when one clamp is Y efiective the.

other is ineffective, a finger-piece on said traveling clamp adapted to cause it to travel to unwind webs from said spool device to form a bight, and means for releasing the clam' which is effective at the time when the bight is formed so that the second clamp becomes effective to cause the webs to feed together. 29. In a typewriting'machlne, the comb-1- nation with a traveling carriage and a revoluble platen therein, of a reciprocating clamp slidable on said carriage, a sllde on which the clamp is mounted, a separate reciprocating clamp slidable on fixed ralls, a

rock shaft for operating said second clamp,

a rock arm splined on said shaft for operating it, a bar fast to said slide andembracing. said rook arm to cause it to travel with the carriage, a link extending from the carriage to said rock arm, a finger-piece for operating said clamps, and links connecting the first clamp and said first-named link to cause one clamp to be effective when the other is ineffective. o

30. In a front-strike typewriting machine, the combination with a traveling carriage, of a swing frame in said carriage, a platen journaled in said swing frame and adapted to be swung in said swing frame so that webs can be drawn from the rear substantially straight beneath the platen, a carbon paper carrier adapted to support carbon sheets betweensaid webs, ahandle for reciprocating tively; feed together,

said carbon paper carrier upon said carriage, a clamp upon said carrier adapted to selze the margins of webs to cause them 'to posiand a pin on said swing framejformlng' a gage over which perforations in said webs ay fit to positively aline the webs.

1 31. In a front-strike typewriting machine, the combination with a traveling carriage, of a swing frame therein, a platen jqurnaled in said swing frame, and adapted to be swung in said swing frame so that webs can be drawn from the rear substantially straight beneath theplaten, .a carbon paper carrier adapted. to support carbon sheets between said Webs, a handle for reciprocating said carbon paper carrier'upon said carriage, a clamp upon said carrier adapted to seize the margins of webs to cause them to positively the combination with of a swing frame therein, a platen j ournaled the combination feed together, means for releasing the clamp from'the webs during the rearward motion of the carriage, and means for automatically causing the clamp to seize the webs at the end of the rearward motion of the carrier.

32. In a front-strike typewriting machine, a traveling carriage,

in said swing frame and adapted to be swung in said swing frame so that webs can be drawn from the rear substantially straight beneath the platen, a carbon paper carrier adapted to support carbon sheets between said webs, a handle for reciprocating said carbon paper carrier upon said carriage, a clamp upon said carrier adapted to seize the margins of webs to cause them to positively feed together, means for releasing the clamp from the webs during the rearward motion of the carriage, and means forautomatically causing-the clamp to seize the webs at the end of its rearward motion, said last-named means being adjustable to suit the varying length of forms, there being also provided means for accurately alining the webs endw1se. I

33. In a front-strike typewriting machine, the combination with a traveling .carriage and a revoluble platen therein, of means for swinging said platen up in sald carriage to permit webs to be drawn thereunder from behind, a carbon paper holder slidable upon said carriage adapted to adjust tlE position of carbon paper between said webs, a clam on each side of said holder adapted to engage the webis while being fed around the platen, a finger-piece for releasing the clamps, and alining devices for alining the webs when so released.

34. In a front-strike typewriting machine,

swinging said platen up in said carriage to permit webs to be drawn thereunder from behind, a carbon said carriage adapted to adjust the position of carbon paper between said webs, a clamp on each side "of said holder adapted to engage the webs whilebeing fed around the platen, a fingerpiece for releasing the clamps, alining devices for alining the webs when so released, a latch for holding the clamps released, and a stop adapted to 'arrest said holder at the rear end of its travel and simultaneously to release said latch to cause the clamps to seize the webs.

JESSE A. B. SMITH.

with a traveling carriage. and a revoluble platen therein, of means for paper holder slidable upon

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