US1363294A - Typewriting-machine - Google Patents

Description

J. WALDHEIM.

TYPEWRITING MACHINE- APPLICATION FILED 05c. 20, 1919.

Patented Dec. 28, 1920.

3 SHEETSSHEI I.

J. WALDHEIM.

TYPEWRITING MACHINE.

APPLICATION FILED 050.20. 1919.

Patented Dec. 28, 1920.

3 SHEETS--SHEEI 2.

J. WALDHEIM.

TYPEWRITING MACHINE.

APPLICATION FILED 050.20, 1919.

1,363,294, Patented Dec. 28,1920.

3 SHEETS-SHEEI s.

UNITED STATES I A I'ENT OFFICE.

JOHN WALDHEIM, F ELIZABETH, NEW JERSEY, ASSIGNOB TO UNDERWOOD TYPE- WBITER COMPANY, OF NEW YORK, N- Y-, A CORPORATION OF DELAWARE.

TYPEWRITING-MACHINE.

Specification of Letters Patent.

Patented Dec. 28, 1920.

Application filed December 20, 1919. Serial No. 346,324.

To all whom it may concern;

l at the same surface speed therewith, but in Be it known that I, JOHN WALDHEIM, a citizen of the United States, residin in Elizabeth, in the county of Union and tate of New Jersey, have invented certain new and useful Improvements in Typewriting- Machines, of which the following is a spec1- fication.

This invention relates to typewriting machines, and more particularly to means for feeding a pack of work-sheets or webs around a cylindrical platen, such as disclosed in my prior application, Serial No. 268,184, filed December 24, 1918.

In the machine disclosed in said application, the work-sheets, instead of being advanced by the platen, are drawn around the same by means of two paper-feeding elements or rolls on the delivery side of the platen, said rolls engaging the pack of work-sheets on opposite sides, and being rotated at equal speeds in opposite directions, thus avoiding creeping of the work-sheets on each other.

An object of the present invention is to I in number, to cooperate with the main feedroll, the front feed-rolls having their shafts connected by universal joints and being geared to said main feed-roll so as to rotate the opposite direction. As a result of this arrangement, the outer sheet will be fed past the printing line at substantially the same speed as the inner sheet, thus obviating the creeping which takes place when the work is fed by the platen itself.

Provision is or may be made of a fingerpiece carried by the platen-lifting frame, and of means whereby movement of said finger-piece to a certain extent will eifect release of the middle or central front roll only, and movement further will effect release of the end rolls as well. Release of all the rolls may be effected manually when it IS desired to insert work-sheets between the feed-rolls, suitable means being provided to malntam the finger-piece in its actuated position. J

When the platen frame is swung forwardly to lift the platen, the feed-rolls will be disconnected from the usual line-spacing mechanism, and the finger-piecewill be actuated by suitable means on the carriage, to release the middle roll, and will be maintained in fixed position with respect to the l ft ng frame during the latter part of the liftlng movement of the lifting frame. When the lifting frame is nearing the end of 1ts forward swing, the main feed-roll will be actuated by an auxiliary drivingmeans, and, since the end rolls are in position to cooperate therewith, the record-sheet will be advanced.

It may be desired at times} to reversely feed the work-sheets. To this end, a oneway connectionis provided between the linespace wheel and the platen when the latter is in its normal position. In order that the platen may be eifective to reversely feed the work-sheets, provision maybe made of feedrolls which are normally in ineffective position with reference to the platen, but which are positioned to coiiperate therewith when reverse feeding is to be effected. In order to enable such reverse feeding, however, it may be necessary to release the feed-rolls from their auxiliary feeding means. Suitable provisions may be made for this purpose.

It will be seen that the arrangementand manner of support of the front feed-rolls enable. them to adapt themselves to the varying thicknesses of the work, due to the grfiater number of sheets beneath the middle r0 Other features and advantages will hereinafter appear.

Fig. 3 is a. front elevation, parts being broken away to show the underlying structure.

Fig. 4 is a sectional side elevation, showing the connections by means of WlllCll th'e paper-feeding elements are actuated.

Fig. 5 is a sectional side elevation, showing the lifting frame swung forward far enough to release the central roll, wh1ch normally engages the front of the work.

Fig.6 is a sectional side elevation, showing the,swing frame in its llmlting forward position, with the parts in the sumed at the end of the record-s eet-advancing operation.

A ack of 'work-sheets 10 is led over a cross-Imi- 11 of a carriage 12, extending rearwardly from the typewriter carriage l3, and, together with a record-sheet 14 of greater width, is led over a shaft 15, supported on the typewriter carriage 13, and downward to pass between the platen 16 and a paper-guide 17. Carbons 18, 1nterleaved between the work-sheets and the record-sheet, are connected with bars 19 of a carbon-carriage 20, mounted for sliding movement on rails 21, supported on carriage 12. After passing the platen 16 and the paper-guide 17, the work-sheets are led upwardly and rearwardly to a paper-table 22, carried by a platen-lifting frame 23, pivoted on shaft 24 in the typewriter carriage, and in which the platen is supported by means of an axle 25.

The normal position of the lifting frame 23 is determined by arms 26, formed on the ends thereof, engaging shaft 15, and said lifting frame is held in its normal position by means of a finger-piece 27, mounted on shaft 15, said finger-piece being urged by a spring 28 into position to cause a hook 29 thereon to engage a pin 30 on said lifting frame. If desirable another hook 29 may be fixed on shaft 15 in position to coiiperate with another pin 30 at the other end of the lifting frame 23.

In carrying out the present invention, the work-sheets may be fed past the printing point,to enable type-bars 31 to print thereon, by means of a main feed-roll 32 engaging the rear side of a pack of work-sheets and secondary or auxiliary feed-rolls engaging the ack of work-sheets on the front side thereof? a middle roll 33 and end rolls 34 to engage the margins of the record-sheet 14, which extend beyond the pack of work-sheets. It will be understood that the work-sheets are drawn past the platen, and serve to rotate the latter. In order that the pack of worksheets may be fed alOIlg the paper-table 22, provision is made of a slot 35 in said papertable through which the main feed-roll 32 projects from the back where it is supported by means of its shaft 36 journaled in the ends of the lifting frame 23. As indicated ositions assaid secondary rolls comprising in Fig. 2, the record-sheet 14, after passing the main feed-roll 32, is led through the slot 35 to the rear of the paper-table 22. The middle auxiliary roll 33 is supported by means of its shaft 37, which rests in open bearings in arms 38 fixed on the shaft 24, and the end rolls 34 are supported by means of their shafts 39-journaled in pairs of arms 40, preferably formed integrally with sleeves 41 mounted loosely on shaft 24.

At the right-hand end of shaft 24 is fixed an arm 42 through which the angular osition of said shaft may be controlled.

rovision is also made of a bell-crank 43 pivoted at 44 on the right-hand end of the lifting frame 23, and having a finger-piece 45 at the endof its upwardly-extending arm 46. Normally, the finger-piece 45 is urged toward the front of the machine by means of a. spring 47 connected at one end to the lifting frame 23, and at the other to the forwardly-extending arm 48 of said bellcrank 43. The spring 47 acts also, by means of pin 49 projecting from arm 48 into a slot 50 in arm 42, to urge roll 33 toward the main feed-roll 32. In connection with this action, shaft 36 is maintained in the open hearings in arms 38 by leaf springs 51, and the urging of arms 38 toward the main feedroll 32 is transmitted by means of leaf springs 52 to an arm 40 on each sleeve 41, thereby urging the end auxiliary rolls 34 toward the main feed-roll 32. Preferably, the leaf spring 5.1,and the leaf spring 52, carried by each arm 38, are formed integrally with each other, as is clearly shown in Figs. 1 and 3.

When finger-piece 45 is moved to the rear, the-middle roll 33 will be withdrawn from the main feed-roll 32 against the urging of spring 47. The position. of the end feedrolls 34 will not, however. be affected until pins 53 on arm 54, projecting from the hubs of arms 38, engage the adjacent arms 40 of the pairs of arms supporting the end rolls 34. If, then, the finger-piece 45 be moved farther to the rear, the end rolls 34 will be withdrawn from the main feed-roll 32.

Withdrawal of the middle feed-roll 33 only may enable a pack of work-sheets to be inserted without change in position of the record-sheet, and also may enable an advance of the record-sheet independently of the pack of work-sheets, as will be more fully described hereinafter. Obviously.

withdrawal of the middle and end auxiliary vrolls in effective position. The pin 55 may be withdrawn from the depression 56 by manual operation of the finger-piece 45.

In order that the auxiliary feed-rolls ma be driven in unison without interfering wit 1 the release of the middle roll 33 independently of the end rolls 34, provision is made of suitable connections, such as universal joints 58, between the adjacent ends of shafts 37 and 39. The left-hand shaft 39 is provided with a pinion 59 meshing with a pinion 60 on the shaft 36 of the main feedroll 32 to insure a uniform feeding movement of the various work-sheets. It should be understood that the teeth of pinions 59 and'60 are of sufiicient length that the said pinions will not be entirely unmeshed by the release or withdrawal of the end rolls 34.

Line-spacing of the work-sheets, when the platen is in its normal position, is effected by means of a line-space lever 61, which moves slide 62, and, by means of a pawl 63 pivoted on slide 62, effects a one, two or three line-space movement of the line-space ratchet wheel 64, in accordance with the position of the regulator lever 64 of the usual Underwood Iinespacing mechanism. The

regulating means may be substantially the same as that disclosed in, the patent to Alfred G. F. Kurowski, No. 1,190,658, dated July 11, 1916.

The ratchet wheel 64 is fixed on one end of a short shaft 65 supported by the carriage, and having at its other end a gear. 66 normally meshing with a pinion 67 carried on the lifting frame and meshing with pinion or gear 60. It should be understood that c the train of gearing is so designed that the advance of the worksheets, by means of the main and auxiliary feed'rolls, is the same as would be effected by a direct drive of the platen by the line-spacing mechanism, the

' position of the regulator lever 64 being the same in both cases.

In order to maintain the feed-rolls in any position to which they have been actuated when feeding or advancing the work-sheets, provision is made of a detent wheel 68, in the form of a star wheel fixed on shaft 36 of the main feed-roll 32, and of a detent roll 69 to engage therewith, said detent roll being rotatably mounted on a leaf spring 70 fixed on the adjacent end of the lifting frame.

\Vhen the lifting frame 23 is released from the control of hooks 29 and swings forward from the Fig. 4 position to the Fig. 6 posi-" tion to enable the work-sheets to be straightened, in order that the carbons may be retracted. it is necessary to release the pack of work-sheets from the feed-rolls so as to enable the leading ends to be drawn into engagement with a leading-end gage 71 before returning the platen to its normal position and severin the forward portions of the work-sheets y means of a knife, not shown.

Also in the present machine, in which a record-sheet is used, it is desirable to advance the record-sheet automatically when the platen is lifted, so that, when the platen is restored to its original position, there will be no danger of superposing a typewritten line on the one last written before the lifting of the platen.

n order to release the ack of worksheets when the platen is lifte provision may be made of a plate 72 mounted on the typewriter carriage and having a cam slot 73 to receive in 55 on bell-crank- 43 when the lifting rame 23 is swung about shaft 24.

The cam slot 73 is so shaped that, u on entrance of pin 55 therein, due to the orward swing of the lifting frame, the bell-crank 43 will be swung to the rear sufliciently to withdraw the middle auxiliary feed-roll 33 only from a position to cooperate with main feed-roll 32, and during the rest of the movement of the lifting frame 23, the feed-roll 33 will be maintained at a constant distance from feed-roll 32, due to the fact that part of the cam slot 73 is substantially concentric with shaft 24.

It will be understood that the automatic shifting of feed-roll 33 from feed-roll 32, 'while sufficient to release the pack of worksheets superposed on the record-sheet 14, is insufficient to Withdraw the end auxiliary feed-rolls 34 from the margins of the recordsheet, thus leaving the record-sheet under control of the main feed-roll 32.

It will be seen that the forward swing of the lifting frame will withdraw pinion 67 from gear 66, thus breaking the driving connection between the usual line-space mechanism and the feed-rolls by which the work-sheets are normally advanced. In order to effect automatic line-spacing or advance of the record-sheet in connection with the platen-lifting operation, provision may be made of means to actuate main feed-roll 32, and consequently the auxiliary rolls in cotiperative relation therewith by means of the star or detent wheel 68. To this end, a lever 74 is loosely mounted on shaft 36 adjacent star wheel 68 and a pawl 75 pivoted on lever 74 at 76 is normally maintained in engagement with the star wheel by means of a leaf spring 77. the lever being maintained with its upper end in forward position by means of a spring 78 connected at one end to the lower end of said lever and at the other end to the lifting frame 23.

As seen in Figs. 4, 5 and 6, movement of the lifting frame from the Fig. 4 position to. the Fig. 5 position will effect release of the middle auxiliary roll 33 and consequently of the pack of work-sheets. During the movement of the lifting frame from the Fig. 5 position to the Fig. 6 position, however, the finger-piece 45 will remain substantially fixed with reference to the lifting frame, and a pin 7 9 on lever 7 4, in which pin the spring 77 is supported, will strike the inclined upper edge of a plate 80 on the carriage and cause lever 74 to be swung about shaft 36, so as to actuate the star wheel 68, and, consequently, through main feed-roll 32 and the end auxiliary rolls 34, advance the record-sheet.

Inasmuch as the forward feeding of the work-sheets is effected exclusively by the feed-rolls at the delivery side of the platen, the latter is preferably supported so as to be turned readily by the pull of the worksheets and the record-sheet thereover. It may, however, be .desirable to effect a reverse feed of the work-sheets at certain times. For this purpose. the left-hand end of axle 25, instead of being journaled directly in the lifting frame, is provided with a sleeve 81 fixed thereon and journaled in the lifting frame. Provision is also made of a gear 82 of the same size as gear 66 and normally in alinement therewith, said gear 82 having a hub 83 mounted on sleeve 81 and maintained thereon by means of a finger 84 on the lifting frame engaging in a groove 85 in said hub 83.

Connection between gear 66 and gear 82 may be effected by means of pinion 67. which is made of suflicient width to mesh with both of said gears, and a one-way driving connection may be provided between hub 83 and sleeve 81 by means of a ball-clutch. indicated in general by 86. It will be understood that said gear 82 is normally driven forwardly with gear 66. It will be under stood that since gear 82 is normally driven forward with gear 66, lost-motion will exist between said gear 82 and the sleeve 81 on the platen axle 25. due to the one-way connection just described. lVhen, however, the shaft 65 is given a reverse turn by means of a finger-wheel 87, the ball-clutch 86 will be rendered effective to actuate the platen in a reverse direction.

Since, however, the pawl 75 on lever 74 is normally in engagement with the star wheel 68 and the lower end of lever 74 is held against a stop 88 by means of the spring 78. such reverse actuation of the platen will normally be prevented. To enable such reverse actuation of the platen to be effected, by means of finger-wheel 87, pawl 75 must be withdrawn from star wheel 68. To this end, provision may be made of a finger-piece 89 pivotally mounted on lever 74 and provided with an eccentric or cam 89 such that by turning said finger-piece to the proper position pawl 75 will be withdrawn from star wheel 68 and maintained in such withdrawn position.

In order that reverse rotation of the platen may effect reverse feeding of the work-sheets, provision is made of front and rear feed-rolls 90 and 91, to cooperate with the platen 16. The feed-rolls 90 and 91 may normally be maintained in cast-off position by means of cast-off mechanism of the usual type, not shown, but when reverse feeding is desired said feed-rolls 90 and 91 are restored to operative position with reference to the platen.

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:

1. In a typewriting machine, in combination, a revoluble platen, a frame to support said platen, a carriage, a shaft on said carriage on which said frame is mounted to enable the frame and the platen therein to be swung from normal to abnormal position and the reverse, a primary feed-roll, secondary feed-rolls opposite said primary roll to cooperate therewith, and means whereby, during the movement of the platen frame from normal to abnormal position, one of said secondary feed-rolls will be released in the initial portion of the movement, and then maintained at a fixed distance from said primary roll during the remainder of the movement.

2. In a typewriting machine, in combination, a revoluble platen, means to feed a plurality of work-sheets around said platen, comprising a. main roll on one side of the work-sheets, a central roll on the opposite side, end rolls substantially in alinement with said central roll, positioned opposite the ends of said main roll, means for urging said central roll and end rolls toward said mainroll, means to cause said central roll and said end rolls to revolve at the same surface speed as said main roll, but in the opposite direction, and means to release said central roll and to actuate said main roll.

3. In a typewriting machine, in combination, a platen, a main feed-roll engaging a pack of work-sheets on the same side as said platen, a plurality of secondary feed-rolls engaging the opposite side of said pack of Work-sheets and cooperating with said main feed-roll, means to drive said feed-rolls in unison, a finger-piece, and means whereby actuation of said finger-piece will withdraw one of said secondary feed-rolls from its position to cooperate with said main feedroll, and further actuation of said fingerpiece will effect withdrawal of another of said plurality of secondary feed-rolls from said main feed-roll.

4. In a typewriting machine, in combination. a platen, means to draw a pack of work-sheets past said platen, including a main feed-roll to engage one side of said pack, a central roll to engage the opposite side of said pack of work-sheets, and end rolls to engage the margins of a wider sheet.

underlying the other work-sheets, and means for withdrawing said central feed-roll from effective position and actuating said main feed-roll and end feed-rolls to advance the wider'sheet.

5. In a ty ewriting machine, in combina tion, a revo uble platen, a-main feed-roll Y to engage one side of a pack of work-sheets, 1 a central feed-roll to cooperate with the central part of said main feed-roll, engag-n ing said pack of work-sheets on the opposite side, a pair of end feed-rolls to cooperate with the end portions of said platen to ress thereagainst the margins of a record sheet'of greater width than the other sheets, means to drive all of said feed-rolls atthe same surface speed, and means whereby the central roll may be withdrawn independently of the end rolls. to enable actuation of the record-sheet independently of the other work-sheets.

. 6. In a typewriting machine, "in combination, a revoluble platen, a main feed-roll at the delivery 'side of the platen'to engage work-sheets on one side, a central roll to 'engage the work-sheets on the opposite side,

end rolls to engage the marginsof a recordsheet extending beyond the side edges of the other work-sheets, and means to effect withdrawal of saidcentral roll and subsequently of the end feed-rolls from the main feed-roll. o

7. In a typew-riting machine, in combination. a platen, means to feed a plural ty of work-sheets past said platen. comprising a main driving roll over which the work is led, a shaft on the opposite side of the work. a'central roll carried by arms fixed on said shaft, so as to becapable ofpressing the work against said main drivlng roll, two outer rolls, each carried by two arms 'means for drawing a pack of work-sheets around a portion of said platen, including a main feed-roll and secondary feed-rolls engaging said pack on opposite sides, said rolls being supported in said liftlng frame,

1 a gear fixed to said main roll to actuate the same, means whereby said secondary rolls are actuated by said gear. means to actuate the main roll-gear, including a gear on the lifting frame and a gear on said carriage in mesh with each other when said platen is in normal position, but out of mesh when said laten is lifted, and means to actuate said eed-rolls when the lifting 70 frame reaches the limit of its lifting movement. v

9. In a typewriting machine, in combination, a carriage, a platen, a platen-lifting frame mounted in said carriage, cooperating feed-rolls at the delivery side of the platen to draw work-sheets around a portion thereof, driving connections between said feed-rolls, a star wheel connected to one of said feed-rolls to rotate therewith, a lever mounted on said lifting frame, a pawl pivoted on said lever in position to-cooperate with said star wheel, and a stop on said carriage positioned to obstruct themovement of said lever when the lifting frame is actuated, and thereby actuate the lever to drive the feed-rolls.

10. In a typewriting machine, in combination, a platen, a guiding device to direct work-sheets around a portion of said platen, a pivoted lifting frame for said platen, means to draw a] pack of worksheets past said platen, including a main feed-roll and three secondary feed-rolls to cooperate therewith, means, including a finger-piece. mounted on said lifting frame for withdrawing the central secondary roll. means whereby withdrawal of said central roll beyond-a certain point will effect withdrawal -of the end secondary rolls, and means to latch said finger-piece in position on said lifting frame when all of the secondary rolls have been withdrawn.

11. In a typewriting machine, in combination, a carriage, a revoluble platen, a 1 5 platen-lifting frame pivot-ally mounted in said .carriageymeans tofeed a pack of worksheets around said platen, including cooperating rolls mounted in said lifting frame at the delivery side of the platen, linespacing mechanism on the carriage, means whereby the line-spacing mechanism may drive said cooperating rolls when said platen is in normal position. but rendered ineffective by the lifting of said platen, and means for actuating said coiiperating rolls at the end of a lifting movement of said lifting frame. f

12. In a typewriting machine. in combination, a platen, means to feed a plurality of work-sheets around the platen, comprising a main driving-roll at the delivery side of the platen, secondary driving-rolls cooperating with said main driving-roll to grip the worksheets therebetween, said secondary drivingrolls comprising a middle roll and two end rolls, means yieldably urging said secondary driving-rolls against said main driving-roll, means to withdraw said middle roll from a position to cooperate with said main drivingroll, and means whereby withdrawal of the middle roll beyond a certain distance will effect the withdrawal of said end rolls.

13. In a typewriting machine, in combination, a carriage, a revoluble platen, a platenlifting frame pivoted on said carriage, a gear on said frame and co-axial with said platen, a one-way clutch between the said platen and said gear, whereby the gear will be effective only for reverse actuation of the platen, means to feed a pluralityof worksheets over said platen including a line-space shaft in alinement with the axis of the platen when the latter is in normal position, a gear on the line-space shaft of the same size of the first-mentioned gear, a pinion on the lifting-frame, meshing with both of the said gears when the platen is in normal position, means to yieldably maintain the gears and pinion in position including a star wheel, means to actuate the star wheel in forward direction when the lifting-frame is swung, including a pawl normally in engagement with the star wheel, and means for withdrawing the pawl from the star wheel to enable reverse feeding of the platen.

14. In a typewriting machine, in combina tion, a carriage, a platen, a shaft mounted on said carriage, a platen-lifting frame, loosely mounted on said shaft, worksheet feeding means including a main feed-roll at the delivery side of the platen, secondary feedrolls to cooperate with said main feed-roll, comprising a central and end rolls, a shaft for each of said feed-rolls. universal joints connecting adjacent ends of the secondary feed-roll-shafts, means to drive said main feed-roll and said secondary feedrolls in unison, arms fixed on said liftingframe-shaft, in which the central feed-roll-- shaft is mounted, a pair of arms to support the shaft of each of said end rolls loosely mounted on the lifting-frame-shaft, but connected together, so as to move as one member, a finger-piece pivoted on the platenlifting-frame, and means controlled by said finger-piece for actuating the platen-frameshaft to withdraw the central roll and subsequently the end rolls, a pin on said fingerpiece, and a plate on said carriage having a cam slot to receive said pin, the outer portion of said slot being shaped to cause withdrawal of said central roll only, and the rest of said cam slot being substantially concentric with said lifting-frame-shaft, whereby the central roll will be maintained at a fixed distance from said main roll during the rest of the lifting movement.

15. In a typewriting machine, in combination, a revoluble platen, a pivotally mounted lifting frame therefor, work-sheet-feedingmeans at the delivery side of said platen, including a main feed-roll and secondary feed: rolls to coiiperate with the main feed-roll to grip a plurality of superposed work-sheets and a record sheet therebetween, said secondary feed-rolls comprising a central roll, to cooperate with said plurality of worksheets, and end rolls to cooperate with margins of the record sheet extending beyond the edges of the work-sheets, a shaft for the main feed-roll, journaled in said lifting frame, shafts for each of said secondary feed-rolls, flexible connections between the adjacent ends of the shafts of said secondary feed-rolls to cause them to rotate, together, while permitting the secondary feed-rolls to be differently spaced from the main feedroll, means whereby the'secondary feed-rolls are driven from the shaft of said main feedroll, a pawl-and-ratchet mechanism for actuating said main feed-roll-shaft, including a wheel on said shaft, a member movably mounted on said lifting frame, and a pawl on said member, normally in engagement with said wheel, and means including a finger-piece, whereby the pawl may be withdrawn from the wheel to permit reverse feeding of said feed-rolls.

15. In a typewriting machine, the combination with a revoluble platen, of anti-creeping means for drawing around said platen a plurality of superposed work-sheets and a record-sheet of greater Width than and underlying said worksheets, including feedrolls to grip the work-sheets and record sheet therebetween, and means to release the worksheets from said feed-rolls and advance the record-sheet by means of said feed-rolls.

17. In a typewriting machine, the combination with a revoluble platen, of means for drawing a plurality of superposed work sheets and a record-sheet around said platen, including feed-rolls to grip said work-sheets and record-sheet therebetween, and means to positively actuate said feed-rolls, means to release said work-sheets, and means for actuating said feed-rolls while said work-sheets are released, thereby advancing the recordsheet.

18. In a typewriting machine, the combination, with a revoluble platen, of feed-. rolls at the delivery side of the platen to grip therebetween a plurality of webs and a record-sheet of greater width than said webs, line-space mechanism to actuate all of said feed-rolls at the same peripheral speed, a second line-space mechanism, and means to render the first mentioned linespace mechanism ineffective, to release the webs, and to actuate the second line-space mechanism to drive said feed-rolls and thereby advance the record-sheet.

19. In a typewriting machine, the combination with a main roll and a central roll opposed to said main roll between which a, pack of work-sheets including a wider sheet may be fed, of end rolls to engage the margins of the wider sheet, means to operate said rolls to feed the pack of work-sheets, means for withdrawing said central roll from its effective position, and means to feed the wider sheet independently of the other work-sheets.

20. In a typewriting machine, the combination with a main roll and a central roll opposed to said main roll between which a pack of work-sheets including a wider sheet may be fed, of end rolls to engage the margins of the wider sheet, means to operate said rolls to feed the pack of work-sheets,

- means for withdrawing said central roll from its effective position, means to feed the wider sheet independently of the other work-sheets, and a finger-piece to render said central roll and said end rolls inefl'ective at will.

21. In a typewriting machine, the combination with a main roll and a central roll opposed to said main roll between which'a pack of work-sheets including a wider sheet may be fed, of end rolls to engage the margins of the wider sheet, means to operate said rolls to feed the pack of work-sheets, means for withdrawing said central roll from its effective position, means to feed the wider sheet independently of the other work-sheets, and resilient means between said central roll, and said end rolls to press the latter toward said main roll. Y

22. In a typewriting machine, the combination with a main roll and a central roll opposed to said main roll between which a pack of work-sheets including a wider sheet may be fed, of end rolls to engage the margins of the Wider sheet, means to operate said rolls to feed the pack of work-sheets, means for withdrawing said central roll from its effective position, means to feed the wider sheet independently of the other worksheets, a support for said main roll, supports for said end rolls, and resilient means between the support of the central roll and the support of each end roll, to press the latter toward said main roll.

. 23. In a typewriting machine, the combination with a main roll and a central roll opposed to said main roll, between which a pack of work-sheets including a wider sheet mav be fed, of end rolls to engage the margins of the wider sheet, means to operate said'rolls to feed the pack of work-sheets means for withdrawing said central roli from its effective position, means to feed the wider sheet independently of the other worksheets, a support for said main roll, supports for said end rolls, resilient means between the support of the central roll and the support of each end roll, to press the latter toward said main roll, a finger-pieceto render said central roll ineffective, and means on the support for the central roll to engage the support of each end roll, whereby a further movement of the finger-piece may render the end rolls ineffective.

24. In a typewriting machine, the combination with a main roll and a central roll opposed to said main roll between which a pack of work-sheets including a wider sheet with interleaved carbons may be fed, of end rolls to engage the margins of the wider sheet, a swing-frame to change the position of parts to permit the pack of worksheets to be straightened out prior to shifting the carbons relatively thereto, means to render the central 'roll ineffective when the swingframe is actuated, and means to advance the wider sheet after the central roll. has been rendered ineffective.

25. In a typewriting machine, the combination with a main roll and a central roll opposed to said main roll between which a pack of work-sheets including a wider sheet with interleaved carbons may be fed, of end rolls to engage the margins of the wider sheet, line-spacing mechanism to feed said pack of worksheets, a swing-frame to change the position of parts to permit the pack of work-sheets to be straightened out prior to shifting the carbons relatively thereto, means to render the central roll ineffective when the swing-frame is actuated, and line-spacing mechanism to feed the wider sheet after the central roll has been rendered ineffective.

26. In a typewriting machine, the combination with a main roll and a central roll opposed to said main roll between which a pack of work-sheets including a wider sheet may be fed, of end rolls to engage the margins of the wider sheet, said end rolls having driving connections with said central roll, means to operate said rolls to feed the pack of work-sheets, means for withdrawing said central roll from its effective position without disturbing the driving relation between the central roll and the end rolls, and means to feed the wider sheet by said end rolls after the central roll has been rendered ineffective.

IioHN WALDHEIM.

\Vitnesses:

EDITH B. LIBBEY, JENNIE P. THORNE.

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