US1425293A - Typewriting machine - Google Patents

Description

J. A. B. SMlTH.

TYPEWRITING MACHINE.

APPLICATION FILED NOV; 18, 19I8 J. A. B. SMITH.

TYPEWRITING MACHINE.

APPLICATION FILED NOVl18, I9l8.

Patented Aug. 8, 1922..

2 SHEETSSHEET 2- lib tnnran snares enranronama,

JESSE A. B. SMITH, F STAMFORD, (KEDN'N'EC'JIZIIICTPI, ASSIGNOB T0 UNDERWOOD 'TFYJPIEI- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYIPEWRITING MACHINE.

Specificationof Letters Patent.

Patented Ange, 1922,

Application filed November 18, 1918. Serial No. 262,939;

To all whom it concern: p Be it known that I, Jnssn A. B. SMITH,

a citizen of the United States, residing in Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

is displaceable upwardly after the comple tion of the typing of each form on the web,

I to permitthe plies of web to be. straightened,

so that the carbon sheets which interleave the plies may be retracted for fresh use. The typed form is then severed from the web.

lin some cases, it is desired toretain in the machine a condensed record sheet, to receive carbon impressions of a succession of bills or forms that are typed upon the main webs; the vforms being usually severed from the web one by one after being typed. The object of this invention is to improve the means for controlling the record sheet, which usually lies next to the platen, being advanced with the web plies during linefeeding operations, but remaining stationary during the pulling forward of t e .web preparatory to tearing ofi the typed form therefrom.

According to the resent improvements, the platen is automatically'rotated one, two, or three line-spaces, during the upward displacement'of the platen for permitting the webs to be straightened out. Since this platen-displacing operation occurs once'for every form that is typed upon the web, it results that the record sheet, which remains in contact with the platen, is automatically advanced thereby, independently of the plies of web, once for every form that is severed from the web. The record sheet is held against "the platen by special feed-rolls, which remain effective as the platen rises, to

'- insure the advance of the record sheet with the platen at thistime.

each end of the platen, to run upon the side margins of the record sheet, which for this purpose, may be made wider than the plies of web. These rolls may be placed at the front of the platen, so as to bite the record sheet nearly at the printing line, so that about all of the record sheet may be used,

avoiding the necessity of providing excessive blank margins at either top or bottom thereof. v v

Another feature of this invention is an improvement in the manner of mounting such rolls. They are carried upon the forward ends of arms which extend forwardly from a horizontal rod which extends along theback of the carriage and is mounted thereon. These arms may slide along-the rod to accommodate sheets of diderent widths. Moreover, these special rolls may be released from the platen Whenever desired, this being accomplished by means of a key mounted upon the carriage and connected to release the roll-carrying arms wherever they, are adjusted along therod.

, h-ile the platen is displaced, a connection between the ordinary line-space wheel and therevoluble platen is maintained by a tram of gearing, such a train being shown in said Wernery and Smith patent. According to the present invention, the line-spacmg wheels are driven automatically during the rise of the platen and thereby revolve the same; and the usual s ring detent, ridmg over the teeth of the ine-space ratchet wheel, serves to hold the platen at theposition to which it is rotated by thevlin'e-space mechanism. The line-space mechanism of the Underwood machine usually comprises a slide which carries a pawl, and said engages the line-space ratchet wheel w enever the slide is pushed backwardly, this usually being accomplished by a lever or handle. In carrying out the present improvements, the platen frame is provided with an arm which engages said slide or a pin thereon, and drives the slide rearwardly for efiecting the line-spacemove ment.

awl 4 Said driving arm, which is connected to v the platen frame, may be so proportioned as to effect a complete driving stroke of said pawl-carrying slide, the same as done by the usually manually-operated lever, and

hence the line-spacing pawl may remain normally out of engagement with the ratchet wheel, as before, and the usual line-space regulator may be employed which controls the duration of the engagement of the drivan Underwood typewriting machine illustrating the class disclosed in said \Vernery and Smith patent, and showing my improvements in one form, some of the parts being in normal positions.

Figure 2 is a sectional side, elevation ofthe carriage of said Underwood machine, showing parts in normal positions.

Figure 3 1s a fragmentary view to illustrate the manner of releasing the rolls.

which hold the record sheet upon the platen of the typwriting machine.

Figure 4 is a view showing the platen near the final stage of its upward displace-' ment, and illustrating the manner in which the line-spacing rotating movement of the platen is begun at this stage. I Figure 5 is a view showing the parts seen 1n Figure 2, but illustrating the upward displacement of the platen as completed, and the line-space operation also as completed. A I

The plies of web 10 are led in at the rear of the machine, and passed forwardly over a traveling slide 11 which has blades 12 to carry sheets 13. of carbon in between the plies of web, and which may slide forwardly with the plies, and also be slid rearwardly, independently of the plies, to feed the carbons to fresh positions rela tively to the webs. The plies with the in-- terleaved carbons pass downwardly around the revoluble platen 14 and between the same and the usual releasable bottom 'feed rolls 15, and then upwardly in front of the platen to a position to receive the impression of the types 16.

A separate sheet 17 is placed next to the platen and is faced with a special carbon sheet-18 which may be carriedby said slide, the special sheet receivin the carbon impressions of a succession 0 forms which are typed and then torn ofi fromthe web plies.

After the completion of the typing of a form, the platen is raised or displaced upwardly, to permit the plies to be straightened out preparatory to sliding back the carbon-carrier, Figure 5; The platen for thesepurpos'es is mounted upon a swingployed and while they may be" otherwise placed, it is preferred to place them upon.

ing frame 19, which is hinged at 20 to a main platen frame or carnage 21, so that the platen may be swung upwardly.

Connection between the platen and the usual line-space wheel 22 and platen-rotat ing knob 23 is maintained by means of a train of gearing comprising gears 24,253,

one rigidly connected to the line-space wheel, and the other rigidly connected to the platen 14, said gears both meshing with a broad pinion 26, which is mounted upon the main platen frame concentrically with the'hinge 20,'so that connection between the line-space wheel and the platen is always maintained. I

Upon the swingin platen frame .19- is fixed, atone end, a riving arm or tappet 27, which at the upward swinging of the platen engages a'pin 28 which projects from. a line-spacing slide 29 usually provided upon the Underwood typewriter.

means, said slide is given, a full rearward stroke, the same as it recelves from the By this manually-operated lever 30. Said slide is 5 operable either by said driving arm or said operating lever. Upon said slide 29 is the" usual pawl 31 for engaging the teeth of the line-space wheel 22. Other devices, are

usually found upon this portion of said Underwood machine, including. a stop to prevent overthrow of the pawl, and means to regulate the extent to which the linespace wheel is rotated by the pawl, said regulating means includin the handle 32, which is usually adjustab e to three tions for single, double and triple 'inespacing. The extent of the movement of the slide' 29 is the same for all three positions of the line-space regulator .32, and hence the extent to which the platen is automatically rotated at the elevation thereof ma be determined by the adjustment 0 this re ulator 32; the slide 29 being given a-ful stroke in every instance.

When the latch 33 is released that usually holds down the platen swinging frame 19,

and said frame is swung up, an independent regulatable rotation of. theplaten is automatically eflected. When the platen is dropped back to printing position,'the linespaoing slide 29 is returned by its usual spring 34, and the parts resume normal positions with the latch 33 resuming its function of holding down the frame 19.

This automatic, line-feeding of the platen serves to advance the record sheet 17 indeplaten pendently of the webs 10, the'side borders of said'record sheetbeing held against the platen b means of special rolls 35, which escape tli e plies'ofweb 10, and grip the record sheet 17 at points. near the print- ,ingvtine, avoiding waste of paper..

ile other kinds of rolls 35 may be em-' the forward ends of arms 36, which ex- 1 ,aaaaee tend forwardly over the top of the platen and are carried upon a horizontal rod 37 which extends above the platen and is supported in ears 38 provided 'upon a paper' .of record sheets, or different positions of tate the -platen at the the same lengthwise of the platen. To permit the rolls to be released from the platen, the arms at the rear ends are pivoted at 40 upon mounts 41 which slide upon the rod 37 and are splined thereto. Sprlngs 4:2 connect the arms with the mounts, so that the rolls may always bear as firmly as required a ainst the platen.

For re easing the rolls 35, there is provided a special release key 43 upon the end of an arm 4A, which is mounted upon a horizontal rock-shaft 45 which extends along the paper shelf 39 and is mounted in the cars .38. Upon this shaft 45 are splined releasing formed that the roll-carrying arms will be locked in released positions, as at Figure 3, by the arm at which is arrested by a stop 43 on the ear 38. Upon lfting the key, the springs 42 will restore the rolls 35 to engagement with the platen-14;. The releasing cams 46. are forked at 47 to'engage the arms 36, soas to be carried along there by when the arms are adjusted along the rod 37, and hence the release key 43 will serve to release the rolls wherever the arms are adjusted along the platen.

Variations may be resorted to within the scope of the invention, and portions of the im rovements may be used withoutothers. aving thus described my invention, 1 claim:

1. The f combination with a revoluble platen, of line-spacing mechanism therefor, mechanism for displacing the platen from printing position, and means operable by said displacing mechanism for l ne-spacing the platen.

2. The combination with a revoluble platen displaceable from printing position, of re ulatable line-spacing mechanism connecte operation. y

3. In a typewritingmachine, the combination with a revoluble platen'and line-spacing mechanism therefor, of a displaceable frame in which said platen is mounted for movement into and out of printingposition, and means connected to said frame" to operate said line-spacing mechanism to roisplacement of the frame. V

t. In a typewritin machine, the combination with a revolu le platen and a displacement relatively to to operate at the platen-displacing placeable frame in which it is mounted, of a main frame upon which said displaceable frame is mounted, line-spacing mechanism upon the main frame, a train of gearing between said line-spacing mechanism and the platen, and means connected to the displaceable frame for operating said. line-spacing mechanism at the displacement of the platen.

5. In a typewriting machine, the combination with a revoluble platen and a displaceable frame in which it is mounted, of

' a main frame upon which said displaceable frame is mounted, line-spacing mechanism upon the main frame, a train of gearing between said line-spacing mechanism and the platen, and an arm or tappet upon said displaceable frame to engage a part of the line-spacing mechanism upon the main frame to operate the same.

.6. The combination with a frame, of a line-spacing mechanism mounted thereon, a revoluble platen displaceably mounted upon said frame for movement into and out of printing position, means connecting said platen permanently to said line-spacing mechanism, and means effective at the platen-displacing mechanism for operating said line-spacing mechanism.

7. The combination with a frame, of a line-spacing mechanism mounted thereon, a revoluble platen displaceably mounted upon said frame for movemeht into and out of printing position, means connecting said platen permanently to said line-spacing mechanism, means eflective at the platen-displacing mechanism for operating said line-spacing mechanism, and a manually operable device upon said frame for oplelrating said line-spacing mechanism at W1 8. The combination of a line-space wheel, 7

a driving pawl therefor, a part to drive said pawl, a revoluble; platen mounted for dissaid line-space wheel, a train of gearing to maintain connection between the line-space wheel and platen, and means effective at the displacement of the platen for operating said part to turn the line-space wheel and platen.

9. The combination of a line-space wheel, a driving, pawl therefor, a part to drive said pawl, a revoluble platen mounted for displacement relatively to said linespace wheel, a train of gearing to maintain connection between the line-space wheel and platen, means effective at the displacement of the platen for operating said part to turn the line-space wheel and platen, and a line-space lever to operate said art.

10. The combination ofaline-spacew eel, a drivin pawl therefor, apart to drive said .paw, a revoluble platen mounted for displacement relatively to said line-space wheel, a train of gearing to maintain connection between the line-space wheel and platen, means'effective at the displacement of the platen for operating said part to turn the line-space wheel and platen, and regulatable means for varying the extent of rotation imparted to the platen at the up ward displacement thereof.

. 11. In a typewriting machine, the combination with a revoluble platen, of linespacing mechanism therefor, mechanism for displacing the platen from printing position, means operable by said displacing mechanism for line-spacing the platen, and pressure devices bearing upon the platen to hold a work-sheetthereon while the platen is'being displaced and line-spaced, thereby to line-feed said work-sheet.

12. In a typewriting machine, the combination with a revoluble platen displaceable from printing position, of pressure devices bearing upon the platen at. the printing position only andreleasable therefrom by the displacement, of the platen to re' lease a work-sheet held thereby, other pressure devices bearing upon the platen adjacent to its ends to engage the marins of a wider work-sheet thereon. during and after the displacement of the platen, line-spacing mechanism connected to operate at the platen-displacing operation for thereby line-feeding said wider work-sheet, and a manually-operable device for operating said line-spacing mechanism at will.

13. In a typewriting machine, in combination, a revoluble platen, line-spacing mechanism therefor, a displaceable frame in which said platen is mounted for movement into and out of printing position, means connecting aid platen permanently to said linespacing mechanism, means connected to said frame to operate said line-spacing mechanism to rotate the platen. at the displacement of the frame, and pressure devices carried by said frame to hold a Work-sheet on the platen during .and after the displacement of the platen.

14;. In a typewriting machine, the combination with a revoluble platen and a displaceable frame in which it is mounted, of a main frame upon which said displaceable frame is mounted, line-spacing mechanism upon the main frame, means connecting said platen permanently to saidline-spacing mechanism, means connected to the displaceable frame for operating said line-spacing mechanism at the displacement of the platen, a manually-operable device upon said main frame for operating said, linespacing mechanism at will, a set of feedrolls carried by said main framefor pressing work-sheets against the platen at the printing position and away from-iiwhich said platen is displaceable, and another set of feed-rollers carried by said displaceable frame to co-operate with the platen during and after its displacementfor pressing the side margins of a wider work-sheet against the platen. r 15. In 'a typewriting machine, the combination with a revoluble platen and feedrolls to run on the bottom thereof, of linespacing mechanism therefor, work-controlling mechanism including means for displacing the platen upwardly from printing position away from said rolls, and means operable by said displacing means for line-spacing the platen, said work-controlling mechanism also comprising a paper shelf at the delivery side of the platen and displaceable therewith, a rod displaceable with the platen and extending along the upper portion of said paper shelf, and arms supported by and adjustable along said rod and extending forwardly and downwardly over said paper,

shelf and displaceable with said platen, and having means to press a work-sheet against the platen to co-operate therewith to feed ,the work-sheet while the platen is being line-spaced during the time that it is out of cooperation with the bottom feed-rolls;

16. In a typewriting machine, the combination with a revoluble platen and feedrolls to run on the bottom thereof, of linespacing mechanism therefor, work-control ling mechanism including means for displacing the platen upwardly from printing position away from said rolls, and means operable by said displacing means for line-spacing the platen, said work-controlling mechanism also comprising a paper shelf at the delivery side of the platen and displaceable thegghcwith, and arms adjustable along the pla'en and extending over said paper shelf and displaceable with said platen, and having means to press a work-sheet against the platen to co-operate therewith to feedthe work-sheet while the platen is being linespaced during the time that it is out of cooperation with the bottom feed-rolls.

17. In a typewriting machine, the combination with a revoluble platen and feedrolls to run on the bottom thereof, of line spacing mechanism to actuate the platen, mechanism for displacing the platen upwardly from printing position and away from said feed-rolls, means operable by said displacing mechanism for line-spacing the platen, and. means displaceable with said platen for pressing a work-sheet against the platen to cooperate therewith to feed the work-sheet while the platen is being linespaced during the time that it is out of cooperation with the bottom feed-rolls.

18. In a typewriting machine, the combination with a revoluble platen and feedrolls to run on the bottom thereof, of mecha nism for line-spacing the platen, and workcontrolling mechanism including means for displacing the platen upwardly from printa mechanism, a paper shelf at the delivery side ing position and. away from said feedrolls and for actuating said line-spacing of the platen and displaceable therewith, a rod displaceable with and extending along the upper portion-of said paper she f, arms supported upon and adjustable along said rod and extending downwardly over said paper shelf, and having means for pressing the margins of a wide work-sheet against the platen during and after its displacement, to co-operate therewith to feed the work-sheet while the platen is being linespaced during the time it is out of co-operation with the bottom feed-rolls, a second rod substantially parallel to the first and displaceable therewith, a release-key connected to said second rod, cams splined to said second rod for releasing said arms and means connecting said cams to said arms to be adjustable therewith.

19. In a typewriting machine, the combina= tion with a revoluble platen and feed-rolls to run on the bottom thereof, of line-spacing mechanism to actuate the platen, mechanism for displacing the platen upwardly from printing position and away from said feed-rolls,-means operable by said displacing mechanism for line-spacing the platen, and arms displaceable with said platen and having means to engage only the side margins of a work-sheet, to press it against the platen to. co-operate therewith to feed the work-sheet while the platen is being linespaced during the time that it is out of cooperation with the bottom feed rolls.

20. In a typewriting machine, in combination, a revoluble platen, feed-rolls to run on the bottom thereof, line-spacing mechanism for the platen, a displaceable frame in which said platen is mounted for movement into and out of printing position, means connected to said frame to operate said line-spacing mechanism to rotate the platen at the displacement of the frame, a paper shelf mounted on said frame at the delivery side of the platen, a rod carried by said frame and extending along the upper end of said paper shelf, and arms supported on and adjustable along said rod and extending downwardly over said paper shelf and having means to press a work-sheet against the platen to co-operate therewith to feed the work-sheet while the platen is being displaced during the time it is out. of co-operation with the bottom feed-rolls.

21.- In a typewriting machine, in combinaand out of printing position, means connected to said frame to operate said linespacing mechanism to rotate the platen at the displacement of the frame, a paper shelf mounted on said frame at the delivery side of the platen, a rod carried by said frame at the rear of the paper shelf, mounts slidable along said rod and splined thereto, and spring-pressed arms pivoted upon said mounts and extending forwardly over said paper shelf and carrying at their forward en s feed-rolls to run upon the platen, to co-operate' therewith to feed a work-sheet while the laten is being line-spaced during the time t at it is out of co-operation with the bottom feed-rolls.

22. In a ty ewriting machine, in combination, a revolu 'le platen, feed-rolls to run on the bottom of the platen, line-spacing mechanism for the platen, a displaceable frame in which said platen is mounted for movement into and out of printing position, means connected to said frame to operate said line-spacing mechanism to rotate the mounts slidable along said rod and splined thereto, spring-pressed arms pivoted upon said mounts and extending forwardly over said paper shelf and carrying at their forward ends feed-rolls to run upon the platen, to co-operate therewith to feed a worksheet while the platen is being displaced during the time it. is out of co-operation with'the bottom feed-rolls, and means to release said arms concurrently from the platen and mechanically lock them in released position.

23. In a-typewriting machine, in combination, a revoluble platen, feed-rolls to run on the bottom of the platen, line-spacing mechanism for the platen, a displaceable frame in which said platen is mounted for movement into and out of printing position, means connected to said frame to operate said line-spacing mechanism to rotate the platen at the displacement of the frame,-

a paper shelf mounted on said frame at the delivery side of the platen, a rod carried by said frameat the rear of the paper shelf, mounts slidable along said rod and splined thereto, spring-pressed arms pivoted upon said mounts and extending forwardly over said paper shelf and carrying at their forward ends feed-rolls to run upon the platen, to co-ope'rat'e therewith to feed a worksheet while the platen is being displaced and the platen and bottom feed-rolls are separated, a second rod substantially parallel to the first and displaceable therewith, a release ke connected to said second rod, cams line tosaid second rod for releasing said arms, and means connecting said cams to said arms to be adjustable therewith. 24, In a typewritlng machine, the combito over said paper shelf and carrying at their nation with a revoluble platen and a displaceable frame in which it is mounted, of

a main frame upon which said displaceable frame is mounted, line-spacing mechanism upon the main frame, means connecting-saidplaten permanently to said line-spacing Qmechanism, means connected to the displace-- able frame for operating said line-spacing mechanism to feed the platen at the displacement thereof, a set of feed-rolls car-' 1 ried bysaid main frame for pressing Worksheets including a sheet ,wider than the others against the platen at the printing position and'away, from which said platen is displaceable, a paper shelf mounted upon said displaceable frame at the delivery side of the platen, a rod carried by said displaceable frame and extending along the upper end of said paper shelf, and arms supported on and adjustable along said rod and extending downwardly over said paper shelf and having at their lower ends feed-rolls to turn upon the platen to co-operate with the platen during and after its displacement for ressing the side margins of the wider wor -sheet against the platen, so that the wider work-sheet.-will be fed during 'the displacement of the platen away from the bottom feed-rolls and the release of the wlder worksheet from the latter.

25.. In a typewriting machine, the combination with arevoluble platen and a displaceable frame in which it is mounted, of a main frame upon which said displaceable frame is mounted, line-spacing mechanism upon the main frame permanently connected to said line-spacing mechanism, means connected to the displaceable frame for operatmg said line-spacing mechanism at the displacement of the platen, a set offeed-rolls carried by said main frame for pressing worksheets against'the platen at the printing po-' sition and away from which said platen is displaceable, a paper shelf mounted upon said displaceable frame at the delivery side of the platen, a rod carried by said displaceable frame at the rear-of the papershelf,

mounts slidable along said rod and splined zthiereto, and-spring-pressed arms pivoted upon said mounts and extending forwardly forward ends feed-rolls to run upon the platen to cooperate with the platen during and after its displacement for pressing the side margins of awider work-sheet against the platen, so that the wider work-sheet will be fed by the platen when the latter is linespaced durmgthe displacement thereof away from the feed-rolls on the main. frame.

26'. In-a typewriting machine, the combination with a revoluble platen and. a displaceable frame in which it is'mounted, of a main frame upon which said displaceable frame ismounted, hue-spacing mechanism upon the main frame, means connecting said against line-spaced in its movement, away from sald platen permanently to said line-spacing mechanism, means connected to the displaceable frame for operating said line-spacing mechanism at the displacement of the platen, a set of feed-rolls carried by said main frame for pressing-worksheets against the platen'at the printing position and away from which said platen is displaceable, a paper shelf mounted upon said displaceable frame at the delivery side of the platen, a

rod carried by said displaceable frame at- I the rear of the paper shelf, mounts slidable along said rod-and splined thereto, springpressed armspivoted upon said mounts and extending forwardly over said paper shelf and carrying at ther forward ends feed-rolls to run upon the platen to -co-operate with the platen after its displacement for pressing the side margins of a wider work-sheet the-platen, so that the latter when a set of feed-rolls carried by said main frame for pressing work-sheets against the platen at the printing position and away from which said platenis displaceable, a

paper shelf mounted upon said displaceable,

frame at the delivery side of the platen, a

rod carried by said displaceable frame atthe rear of the paper shelf, mounts slidable rolls to run upon the; platen to co-operate with the platen during and after its displacement for pressing the side margins of a wider-work-sheet against the platen, so that 'the wider work-sheet will be fed by the platen when the latter is line-spaced during its movement away'from the feedgrollson the main frame, a second rod carried by said displaceable frame substantially parallel with the first and displaceable therewith, a

release key connected to said second rod,

cams splined to said second rod for releasing said arms, and means connecting said camsto said arms to be adjustable therewith.

, 28. In a typewriting machine, the combination with a revoluble platen and a'displaceable frame in which it is mounted, of a main frame upon which said displaceable 'alongisaidrod and splined thereto, springpressed arms pivoted upon said mounts and extending forwardly over said paper shelf and carrying at their. forward ends feedplaten relatively to said frame is mounted to swing forwardly, said main frame havlng a front bar, line-spacing mechanism upon the main frame, means conmeeting said platen permanently to said linespacing mechanism, means connected to the displaceable frame for operating said linespacing mechanism at the displacement of the platen, a set of feed-rolls carried by said main frame for pressing worksheets against the platen in the printing position and away from which said platen is displaceable, a paper shelf mounted upon said displaceable frame at the delivery side of the platen, and arms supported upon said displaceable frame and extending downwardly at the front of said paper shelf in position to clear the front bar of the main frame when the displaceable frame is swung forward to displace the laten, said arms having at their lower ends feed-rolls to turn upon the platen to co-oper ate with the platen during and after its displacement for pressing the side margins of a wider work-sheet against the platen, so that the wider work-sheet will be fed by the laten when the latter is line-spaced during lts movement away from the feed-rolls on the main frame.

29. In a typewriting machine, the combination with a revoluble ptaten, feed-rolls to run on the bottom thereof, and a platenframe, of line-spacing mechanism to actuate the platen, mechanism for displacing the platen-frame and upwardly from printing position and away from said feed-rolls, means operable by said displacing mechanism for line-spacing the platen, and arms adjustable longitudinally of the platen and displaceable with said platen and carrying means to press a worksheet against the platen to co-operate therewith to feed the work-sheet while the platen is being line-spaced during the time that it is out of co-operation with the bottom feedrolls.

30. lln a typew-riting machine, the combination with a revoluble platen, of line-spacing mechanism therefor, mechanism for displacing the platen from printing position, means operable by said displacing mechanism for line-spacing the platen, a paper shelf at the delivery side of the platen and displaceable therewith, and spring-pressed ivoted arms displaceable with and extend-. ing downwardly over said paper shelf and having means at their lower ends for pressing a work-sheet against the platen.

31. In a typewri-ting machine, the combination with a revoluhle platen displaceable.

from printing position, of line-spacing mechanism connected to operate at the platendisplacing operation, pressure devices hearing upon the platen at the printing position only and releasable therefrom at the dislacement of the platen to release a worksheet held therebyfa paper shelf at the delivery side of the platen displaceable therewith, and spring-pressed pivoted arms displaceable with and extendingdownwardly over said paper shelf and having at their lower ends means for pressing the margins of a wider work-sheet against the platen during and after its displacement.

32. In a typewriting machine, in combination, a revoluble platen, line-spacing mech anism therefor, a displaceable frame in which said platen is mounted for movement into and out of printing position, means conmeeting said platen permanently to said linespacing mechanism, means connected to said frame to operate said mechanism to rotate the platen at the displacement of the frame, a paper shelf mounted on said frame at the delivery side of the platen, and springpressed pivoted arms displaceable with and extendingdownward over said paper shelf and having means for pressing a work-sheet against the platen.

33. In a typewriting machine, the combination with a revoluble platen and a displaceable frame in which it is mounted, of a main frame or carriage upon which said displaceable frame is mounted. line-spacing mechanism upon the main frame, means connecting said platen permanently to said line-spacing mechanism, means connected to the displaceable frame for operating said line-spacing mechanism at the displacement of the platen, a set of feed-rolls carried by said main frame for pressing work-sheets against the platen atthe printing position and away from which said platen is displaceable. a paper shelf mounted upon said displaceable frameat the delivery side of the platen. and spring-pressed pivoted arms displaceable with and extending downwardly over said paper shelf and having at their lower ends feed-rolls to turn upon the platen to co-operate with the platen during and after its displacement for pressing the side margins of a wider work-sheet against the platen.

JESSE A. B. SMITH.

Witnesses:

EDITH B. LnBBnr, CATHERINE A. Nnwnrm.

Images