US1994647A - Typewriting machine - Google Patents

Description

D N o M L E H F w TYPE-WRITING MACHINE Filed Oct. 24, 1931 3 Sheets-Sheet l March 19, 1935. W' F. HELMQND ,9

TYPEWRITING MACHINE Filed Oct; 24, 1931 3 Sheets-Sheet 2 plete typed lines above the printing line.

Patented Mar. 1%, 1W3

signor to Underwood Elliott lFisher Company,

New York, N. Y., a corporation of Delaware Application October 24, 1931, Serial No. 570,845

27 Claims.

This invention relates mainly to front-inserting and aligning paper-sheets around.- a typewriter-platen.

A cross-plate is mounted in front of the platen, and is displaceable below or above the printing line, to occupy a plurality of working positions.

The plate when lowered below the typing line is automatically moved away from the platen, to serve as a front-insertion paper-chute. When the plate is raised just above the printing line, it is automatically moved close to the platen, to function as a sheet-aligner. The plate may then be moved still further above the printing line, and will move automatically away from the platen, to free the sheet for line-feeding movements, and to guide said sheet over the rear of the platen, and also to co-operate with the lower feed-rolls to hold the sheet taut at the printing line.

In this manner the paper-deflector may act as a front-inserting chute, as an aligning bar, and as a paper holding. and guiding means.

The plate is in the form of a narrow strip, but is suficiently wide to act as a front chute in cooperation with the regular paper-chute at the introductory side of the platen; yet whenmoved to its paper-guiding position, it will not obscure the typing line, nor the previously typed lines.

The paper-table which forms the outer wall of the outer sheet inserting passage may be extended in front of the platen, and above the printing line by means of a tiltable and swingable frontfeed paper-deflector.

This front-feed paper-deflector is in the nature of a front blade which extends the full length of the platen. It is pivoted on the front cross-memher of a swingable bail. l'he bail may be swung down in order to bring said blade to a position below the printing line, in whichit shields the ribhon-vibrator and the type-guide of the machine, and forms a very wide flaring mouth for facilitating the insertion of a work-sheet or a pack of sheets, bottom first, downwardly into the outer throat.

The bail can be then swung up to an intermediate point, where the lower edge of the blade will serve as an accurate full-length writing-line gage for adjusting the work-sheets. The bail can finally be swung further up to normal position, far above the printing line, in order to be fully out of the paths of the types, and to uncover com- The device holds the work-sheet snugly close to the upper front part of the platen.

Another feature of the invention is to provide interchangeable noise-deadening stops for adjustably limiting the upward stroke of said bail, in order to accommodate the front-insertion device to the different heights of the heading of the work-sheet.

Another feature is to provide a releasable spring-detent to hold the bail fast in each of its three operating positions.

The inside of the inner feed-line or paperinserting threat is formed by the periphery of the platen and the outside by a row of curved springflngers adjustable along a rod of square section with cylindrical end-trunnions journaled in the end plates of the platen-frame. The free curved ends of the fingers are yieldingly pressed against the bottom of the platen.

Auxiliary feed-rolls grip the record-sheet and are provided with guiding means to deflect the work-sheet out of their grip.

A connection is provided between the frontinsertion device and the usual lower feed-rollrelease mechanism, such that the lower feed-rolls will be automatically restored in their operative position when the bail of the front-insertion device is swung up from its intermediate aligning position into its typing position.

The front paper-deflector may be tilted by hand about the rod of its carrying bail so as to remove the lower edge of the blade away from the platen in order to facilitate the insertion of the recordsheet at the front of the platen.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a of an Underwood typewriting machine having the invention applied thereto, with parts broken away for clearness.

Figure 2 is a front view, partly in section, showing the mounting of the deflector-guide cam on the right-hand carriage-end frame.

Figure 3 is a cross-sectional view showing the deflector in aligning position and the holding detent moved to its ineffective position.

Figure 4 is a cross-sectional view of said carriage showing the deflector in normal position to permit printing.

, Figures 5 and 6 are cross-sectional views showing the front deflector in its inserting and aligning positions respectively.

Figure '7 is a fragmentary cross-sectional view showing how the front deflector is manually held for facilitating the insertion of the record-sheet.

Figure 8 is a plan view of the parts shown in Figure 1.

Figure 9 is a plan view showing the mounting perspective view of the carriage of the paper-guiding fingers forming the inner paper-table on the end-plates of the platenframe of the machine.

A record-sheet 10 together with its carbonsheet 11 are inserted down from the rear of a platen 13 over a row of spring-fingers 14 until gripped by a row of front lower feed-rolls 15, while holding the left edges of said two sheets 10, 11, in abutting relation with a lateral gage 16.

These two sheets 10, 11 are fed up around the front of the platen 13 by revolving the platen through. its shaft 96 and right platen-knob 17, while through a finger-piece 18 (Figure 7), a front deflector 19 is tilted about its bail 20 and held against the action of a spring 21 until the tops of the two sheets 10 and 11 have passed through the relatively large gap thus created between the platen 13'and the lower edge 22 of said deflector. The sheets 10, 11 are guided up into said gap by the usual wing-scale 23. The fingerpiece 18 is then released and spring 21' restores the deflector 19 to its initial position, Figure 4. In this position the side arms 25 of said bail bear against a pair of noise-deadening stops 26. The record-sheet is fed under a bail 28 carrying auxiliary feed-rolls 24, which are moved away from the platen, as seen in Figure 7, by tilting to the rear a release handle 27 before inserting the and 11. A leaf-spring 29 is provided to hold the said ball 28 fast in its lifted or released position as shown .in Figure 7. At each side of the bail 28 said spring 29 co-operates therefore with flat portions 30, provided in collars 31, securedto the pivots 32 of the bail 28 by means of set-screws 33. After the leading portions of the sheets have passed under the rolls 24, the latter are returned to normal effective position and may be laterally adjusted along the rod of the bail 28 in position with respect to the sides of the record-sheet 10. In this position they are yieldingly held pressed against the sheets by the springs 29 co-operating now with the rear edges of other flat portions 34 of'the collars 31 (Figure 4), and the record-sheet is fed either of the platen-knobs 17.

Preparatory to the front insertion of another work-sheet 35, as for example a bill-form, the typing on which is transferred, by means of the carbon-sheet 11, to the record sheet 10, the operator depresses the feed-roll-release lever 36 pivoted at 37 to the right end-plate 38 of the platenframe to move the lower feed-rolls 15 away from the platen.

A rear paper-table 39,-which is operatively connected to said rolls 15, is slidably mounted on a support 40 at the rear of the platen 13 by means of a slot-and-guide connection 41, 42, so that its lower part or apron 43 may follow this release movement.

The feed-roll-release mechanism comprises a rod 44, secured at its ends by the end-plates 38 and serving as a fulcrum for levers 45 which swing on said rod 44. The two outer levers 45 are pivoted by means of collar-screws 46 to ears 47 projecting at both sides from the apron 43 of the paper-table 39, while a rod 48 carrying the feedrolls 15 is seated in the slots 49, provided in the two inner levers 45. The levers 45 may be retained laterally on the rod 44 by collars 44a.

Springs 50, acting on the upper ends of said levers 45, urge the feed-rolls 15 towards the platen l3, and also urge the paper-table and its lower apron 43 to assume the Figure 4 position.

The levers 45 presentalong their lower arms flat portions 51 co-operating with cam-notches 53 formed in a cam-shaft 52, joumaled in brackets 54, secured to the rod 44 by means of set-screws 55.

This cam-shaft 52 is bent at its right-hand end so as to form a crank-arm 56, connected by a link 57 to a stud 58 flxed to a crank-arm 36a of the release-lever 36.

The lower feed-rolls 15 and the apron 43 being thus released to the Figure 5 position by depressing the release-lever 36, a relatively very wide throat 59 is formed under the platen between the guide-fingers 14 and the paper-table 39 for the insertion of the work-sheet 35, Figure 5.

In order to prolong said throat at the front of the platen beyond the front edge of the apron 43 and to form a large mouth or entrance therein near the printing line for the work-sheet 35, the operator lowers the ball 20 from its normal uppermost position (Figure 4) to its sheet inserting or lowermost position, shown in Figure 5, by depressing a key 60 flxed on said bail 20. the downward movement of the bail 20, the deflector 19 is slightly swung about the rod of said bail against the action of the springs 21 by two cam-members 61 co-operating with a pair of camfollowers 62 mounted on the side edges of the deflector 19 in alignment with the lower edge 22 thereof.

These cam-followers consist of small slotted cylinders fastened on projections 63 formed at the ends of said lower edge 22. The free ends of the springs 21 press upon the front side of said projections, thereby holding said cam-followers 62 constantly and yieldingly pressed against said cam-members 61. The lower ends of these cammembers 61 are turned forwardly at 64, so as to form two notches or stops 65 determining the end of the downward stroke of the bail 20. When the cam-followers 62 rest in said notches 65, the edge 22 is held at a distance away from the platenperiphery (Figure 5), so as to provide a relatively large passage for the work-sheet 35 from said front mouth into said throat 59.

It will be noted that in this lowermost position, the deflector 19 forms opposite the printing line a smooth, unobstructed surface which covers the wing-scale 23 and guides the work-sheet 35 over the front edge of the apron 43, thus preventing, dm'ing the insertion of said work-sheet 35, any

A detent or pawl 68 holds the bail 20 fast in this lowermost position against upward movement or vibration, through an outwardly-projecting stud 69 carried by the right arm 25 of the bail 20 engaging in a lower notch 70 of said detent 68.

Before inserting the work-sheet 35 downwardly in front of the platen 13, the operator adjusts a side-gage 71 in a position along the tubular top part 72 of the deflector 19, so that it will mark the correct position of the right edge of said sheet 35 .with respect to'the right edge of the record-sheet 10. Even if the work-sheet 35 is very long, its lower part may be inserted into the throat 59 as far as desired towards the rear of the machine without interfering with the record-sheet 10.

During the front-insertion of the work-sheet 35, the record-sheet 10 is held in its typing position, above the printing line, by the auxiliary ea er? top feed-rolls 24 and around the bottom of the platen 13 by the free ends of the rear guidefingers 14.

When the work-sheet 35 has been entered in the throat 59 by means of the fully lowered deflector 19, the operator, holding said work-sheet 35 against the side-gage '71, swings the bail 20 back as indicated by the arrow in Figure 6 until the stud 69 engages an upper notch 73 of the detent 68. The profile of the carp-members 61 presents a substantially flat portion 74 so designed that during this upward movement of the deflector 19, its lower edge 22 is brought toward the platen close to the record-sheet 11 by the action of the springs 21, thereby pressing the work-sheet 35 toward the platen near the printing line.

The operator may then use the straight lower edge 22 of the deflector 19 as a full-length writing-line gage and adjust the work-sheet 35 in vertical and horizontal position with respect thereto.

Assuming that the record-sheet 10 is already line-spaced, the work-sheet 35 will be in correct registration therewith when the top edge of its previously written line coincides with the visible lower edge 22 of the deflector 19 and will be in correct position to receive the tyS$f88 on the type-bars 90.

The right arm 25 of the bail 20 carries a second outwardly-projecting stud '76, which is brought by this upward movement of the bail 20 closely under a rear arm 77 ofan idle lever 78, the front arm '79 of which is ofiset at 80, so as to rest freely on an inner projection 81 of the stud 53 which connects the link 57 tothe feed roll-releas'e' crank-lever 36.

When the operator wants to speed her work, the deflector may be manually held in the sheetinserting position, of Figure and after the sheet is front-inserted, the deflector may be moved to work-sheet-truing position i without using the detent 68. For this purpose the operator shifts to the rear, by pushing with her right hand a knob 82, a floating lever 83 pivoted at 84 to the upper end of said detent 68, thereby swinging said latter to the inoperative or idle position shown in Figure 3. With the detent 68 thus inoperative, the deflector 19 is held by the operator at about the Figure 6 position while the work-sheet is trued. The detent 68 is held in this position by the floating lever 83, a notch or hooked portion 85 of which is hooked on a stud or collar-screw 86, carrying the noise-deadening stop 26. By lifting the knob 82, said detent 68 may be restored to its operative position.

When the work-sheet 35 has been aligned the operator swings the bail 20 further up far above the printing line until it reaches its uppermost position (Figure 4), in whichit is stopped by the two noise-deadening stops 26, which in the Figure 4 position abut the upper edge of the arms 25. By means of a ramp 95, formed at the upper part of the detent 68 and abutting the stud 69, untoward movement or vibration of the bail 20 is prevented when the deflector 19 is moved from the Figure 6 to the Figure 4 position, the stud 76, carried by the right arm 25, swings the idle lever 78 about its pivot 87, so that its frontarm l9 through contact with the stud 58 depresses the link 57 of the feed-roll-release mechanism, and thereby restores the lower feed-rolls 15 to their operative position. I

The lower part of the work-sheet 35 is thus clamped together with the record-sheet and the interleaved carbon-sheet 11 between the platen 13 and the feed-rolls under the printing line, while its upper part is held rearwardly by the edge 22 of the deflector 19, thereby holding the sheet close to the platen at the printing line.

To prevent the upper edge of the work-sheet 35 from being rolled under the auxiliary feedrolls 24 when line-spacing, each roll 24 is provided with a front shoe or deflector 91 designed so as to direct said edge up along the front face of said shoe and away frqm the feed-rolls. These shoes are keyed on the rod of the bail 28 by means of tongues 92 which may slide in a groove 93 provided along said rod.

It will be noticed that in the upper normal typing position of the bail (Figure 4), the lower edge 22 of the deflector 19 is located sufficient- 1y far above the printing line to leave along the full length of the platen a front open space 94 giving complete visibility above the printing line. To remove the work-sheet 35 from the machine after typing, the operator merely depresses the feed-roll-release lever 36 and withdraws the sheet by pulling it up past the auxiliary feedrolls 24 and the thus lowered front deflector 19, the latter being lowered to the Figure 6 position by the lever 78 which is caused to swing when the release-lever is depressed. During this release of the bottom feed-rolls, the record-sheet 10, with its carbon-sheet 11, is still held fast and operatively connected to the platen by the clamping action of the spring-fingers 14 and of the auxiliary rolls 24.

If desired, the key 60 may be operated simultaneously with the feed-roll-release lever to position the deflector to sheet-inserting position, so

that after removal of the work-sheet-35, the deflector 19 lies in the inserting position shown in Figure 5, and is ready for the insertion of a new work-sheet upon the sloping chute formed by the upper side of the deflector.

The spring-fingers 14 have flexible lower free ends 97 which conform generally to the curvature of the platen while their upper portions go progressively away from the platen, so as to form a wide rear open or flaring mouth for the rear-in- 'sertion of the record-sheet 10.

: Said spring-fingers 14 are adjustable along arod' 98 of square section and provided at both ends with cylindrical trunnions 99 journaled in the end-plates 38 of the platen-frame. The right .trunnion 99 projects beyond its bearing 100 in the right end-plate 38 and presents a flat portion 101 in this projection 102, which is kept at an angle with respect to the free end of a leaf-spring 103, tending to hold the free curved ends 97 of the fingers 14 yieldingly pressed against the bottom of the platen, independently of their own flexibility. This leaf-spring 103 is formed as seen in Figure 1 and is adjustably fastened at the back of the platen-frame to an outwardly-projecting flange, 104 of the right-end-plate 38 by means of the two bolts 105, the adjustmentbeing made possible by two slots 106, provided in the spring 103. Lateral displacement of the rod 98 is prevented by means of a headed screw 10'? (Figure 9) cooperating at the left end of the rod with a shoulder 108 thereof.

The side arms of the front deflector-bail 20 are pivoted at the back of the platen-frame about headed collar-screws 109 on a pair of sidebrackets 110, fastened by means of screws 111 on the upper flanged edge 112 of the end-plates 38. Two compensating springs 113 have one end 114 hooked under the side arms 25 and the opposite end 115 anchored in holes 116 of the bracket 116, so as to balance the weight of the deflector 19, the bail 20 and the key 60. To the right hole 116 is also anchored a second spring 117 tending to pull downward the floating lever 83. The two holes 116 are provided in oblique ears 118 of downwardly projecting flanges 120 of the brackets 110. The noise-deadening stops 26 may be interchanged by removing screws 119 and stops of diiferent diameters may be mounted on the studs 86 in order to adjust the distance between the lower edge 22 of the deflector 19 and the printing line in the uppermost position of the bail 20. The studs 86 are screwed in the downwardly-projecting flange 120 of brackets 110. 4

The upper feed-roll bail 28 is a one-piece rod reduced at 121 to facilitate-the bending at right angles of the side-arms of the bail, after assembly on said rod of the feed-rolls 24. The free ends of said side-arms are slidably mounted at 122 in the pivots 32 in order to adjust the length of said side-arms and hence the position of the auxiliary rolls 24 on the platen 13. A pair of setscrews 123 serve to hold the bail 28" in its adjusted position.

The flat springs 29 of the bail 28 are adjustably mounted on the brackets 110 by means of slots 124 and screws 125'.

Each cam-member 61 is fixed to the corresponding end-plates 38 by means of a screw 126 and a bolt 127, two shims 128 being mounted on said screw and said bolt between the member 61 and end-plate 38 and a collar-nut 129 being mounted on the threaded end of the bolt 127. Thus each cam-member is clamped between one nut 129 and one shim 128 (Figure 7) The detent 68 is pivotally mounted on the right collar-nut 129. A spring 130, anchored in a hole 131 of an ear 132 of the right flange 120, pulls' the lower end of the detent 68 towards the rear, thereby holding the ramp 95 or either of the notches 70 or 73 pressed against the stud 69.

The position of the upper notch 73 and of the ramp 95 with respect to the pivot 129 of the detent may be readily adjusted by opening more or less an opening or slot 133, i. e., by bending a neckpart 134 of said detent.

Openings 135 are provided in the flanges 120 of the brackets 110 to allow the endwise insertion of the square rod 98 (Figure 9).

The pivots 32 of the bail 28 are journaled in two pairs'of upwardly-projecting flanges 136 of the brackets 110 while the collars 31 are disposed between said flanges.

Variations may be resorted to within the scope ofthe invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. A front-strike typewriting machine comprising a revoluble platen, means forming with said platen an inner unobstructed paper-inserting throat or feed-line extending over the full length of said platen and having a rear flaring mouth for rear-insertion, means forming an outer unobstructed paper-inserting throat or feed-line formed around said inner feed-line over the full length of the platen and having a front lip below the printing line, a device for guiding a front-inserted sheet over said lip, and means mounting and controlling said device so that it is shiftable to a cast-01f position above the printing line, to an eifective position for sheet-insertion, and to an intermediate position to serve as a sheet-aligning gage, said device being mounted to swing to its three positions about an axis behind the platen.

2. A typewriting machine comprising, in combination, a revoluble platen, a rear inner paperguide for rear-insertion, a rear outer releasable paper-table having a lower apron under the platen, prolonged toward the front of the platen for the front-insertion of a work-sheet, and a tiltable and swingable front-feed paper-deflector for guiding said work-sheet between the platen and apron, said deflector being mounted to swing bodily up and down in front of said platen about an axis behind the platen and being also tiltable from and toward said platen.

3. A typewriting machine comprising, in combination, a revoluble platen, a frame therefor having two end plates, 2. swingable bail having a front rod and side arms pivoted to said end plates at the back portion of said frame, and a frontfeed paper-deflector tiltably mounted on said rod.-

4. A typewriting machine comprising, in combination, a platen-frame with two end plates, a revoluble platen journaled in said end plates, a swingable bail having a front rod extending over the full length of said platen, and two side arms extending along the sides of said platen to the rear of said platen-frame where they are pivoted to said end plates, a blade with a rolled top pivotally mounted on said rod, and spring-means urging the lower edge of said blade towards said platen.

5. A typewriting machine comprising, in combination, a frame, a carriage mounted to reciprocate on said frame, a shiftable platen-frame with two end plates on said carriage, a revoluble platen journaled in said end plates, a ribbonvibrator and a type-guideymounted on said carriage in front of said platen, type-bars, with upper and lower types, swingably mounted in said first-mentioned frame, a blade forming a front-feed paper-deflector, and a swingable bail pivotally mounted at the rear of said platenframe, which may be swung down so as to bring said blade to a position below the printing line in which it covers said ribbon-vibrator and said type-guide and forms a wide flaring mouth facilitating the downward insertion of a worksheet in front of said platen, which may be then swung up to an intermediate position where the lower edge of said blade will serve as an accurate full-length writing line gage for adjusting said work-sheet thereto and which may be finally swung further up far above the printing line in order to be fully out of the path of said types.

6. A typewriting machine oomprising,'in combination, a platen-frame withtwo end plates, a

revoluble platen journaled in said end plates, a swingable bail having a front rod extending over the full length of said platen, and two side arms extending along the sides of said platen to the rear of said platen-frame where they are pivoted to said end plates, a blade with a rolled top pivotally mounted on said rod, a pair of cam-followers carried on the sides of said blade in alignment with the lower edge thereof, two cam-members co-operating with said cam-followers, and spring-means holding said cam-followers pressed against said cam-members.

7. A typewriting machine comprising, in combination, a platen-frame with two end plates, a revoluble platen journaled in said end plates, a swingable bail having a front rod extending over the full length of said platen, and two side arms extending along the sides of said platen to the rear of said platen-frame where they are top pivotally mounted on said rod, a pair of camfollowers carried on the sides of said blade in alignment with the lower edge thereof, two cammembers co-operating with said cam-followers, spring-means holding said cam-followers pressed against said cam-members, and means determining three different operating positions of said swingable bail, these cam-members being firmly fixed to said end plates and having a profile designed so as to adjust with great accuracy the relativeposition of the lower edge of said blade with respect to the periphery of the platen in each of these three operating positions of said bail and also to serve as a stop for limiting the downward stroke of said bail.

8. A typewriting machine comprising, in combination, a platen-frame with two end plates, a

revoluble platen journaled in said end plates, a

swingable bail having a front. rod extending over the full length of said platen, and two side arms extending along the sides of said platen to the rear of said platen-frame where they are pivoted to said end plates, a blade with a rolled top pivotally mounted on said rod, and acting as a front-feed paper-deflector for facilitating the front insertion of a work-sheet, as a full-length writing-line gage for adjusting said work-sheet thereto or as a paper-guide for holding said work-sheet snugly close to the upper front part of the platen, and interchangeable noise-deadening stops for adjustably limiting the upward stroke of said bail so as to accommodate the position of said blade during typing to different heights of the heading of saidwork-sheet.

9. A typewriting machine comprising, in combination, a platen-frame with two end plates, a revoluble platen journaled in said end plates, a swingable bail having a front rod extending over the full length of said platen, and two side arms extending along the sides of said platen to the rear of said platen-frame where they are pivoted to said end plates, a blade pivotally mounted on said rod so as to be tiltable toward and from said platen, a pair of cam-followers carried on the sides of said blade, two cam-members co-operating with said cam-followers, spring-means holding said cam-followers pressed against said cammembers, said cam-members determining a plurality of operating positions of said swingable bail, and spring-detent means co-operating' to yieldably hold said bail against untoward displacement in each of said three operating positions.

10. A typewriting machine comprising, in combination, a revoluble platen, two superposed paper-feed lines, an inner one formed by paperguiding means and by releasable bottom and top feed-rolls, said guiding means extending around the bottom of the platen and clearing the bottomfeed-rolls, and an outer feed-line formed by a releasable rear paper-table operatively connected to said bottom feed-rolls, and having an apron curved around the platen under said paperguiding means, and deflecting means carried by said top feed-rolls, said deflecting means being arranged at an angle with the platen-surface to guide a sheet, feeding from the outer feed-line, over the top feed-rolls.

11. A typewriting machine comprising, in combination, a platen-frame with ends, a platen journaled in said ends, a pair of brackets fastened to said ends, two swingable bails, the side arms of which are pivoted to said brackets at the rear of said platen, and the cross-rods of which extend in front of the platen, a tiltable front paperfeed deflector pivotally mounted on the crossrod of one of said balls, and top feed-rolls adjustable on the other of said cross-rods.

12. A typewriting machine comprising, in combination, a platen-frame with end plates, 2. platen journaled in said end plates, a pair of brackets fastened to said end plates, two swingable bails, the side arms of which are pivoted to said brackets at the rear of said platen, and the cross-rods of which extend in front of the platen, a tiltable front paper-feed deflector pivotally mounted on the cross-rod of one of said bails, and top feedrolls adustable on the other of said cross-rods, the side arms of the top feed-roll bail being slidably mounted in their pivots, and fastening means being provided to fix'them in an adjusted position in order to permit a precise adjustment of the position of saidfeed-rolls on the top of the platen.

13. A typewriting machine comprising, in combination, a revoluble platen, a frame therefor provided with two end plates, flanged edges on top of said end plates, two brackets secured on said edges and presenting each a pair of upturned ears and af downturned flange projecting down against the inner sides of said end plates, pivots or trunnions journaled in said ears, wedgemembers angularly adjustable on said pivots between said ears, leaf-spring fixed on said brackets and co-operating with either side of said wedge-members, a one-piece swingable bail adjustably mounted in said trunnions, set-screws to fix said bail in adjusted position, and top feed-rolls adjustable along the cross-rod of said bail and yieldingly kept pressed against the top of said platen by the action of said leaf-springs in operative position of said bail as then only the rear edges of the operative sides or faces of said wedge-members bear against the free ends of said springs.

14. A typewriting machine comprising, in combination, a revoluble platen, a frame therefor provided with two end plates, flanged edges on top of said end plates, two brackets secured on said edges and presenting each a pair of upturned ears and a downturned flange projecting down against the inner side of said end plates, a swingable bail pivoted to said downturned flanges at the rear of the platen, a removable front-feed paper-deflector pivotally mounted on the crossbar of said bail, interchangeable noise-deadening stops mounted on studs secured to said downturned flanges, and compensating springs mounted on. the pivots of said bail to balance the weight of said deflector and of said cross-bar.

15. A typewriting machine comprising, in combination, a revoluble platen, a frame therefor provided with two end plates, flanged edges on top of said end plates, two brackets secured on said edges and presenting each a pair of upturned ears and a downturned flange projecting down against the inner side of said end plates, a swingable arm pivoted to said downturned flanges at the rear of the platen and forming part of a swingable bail carrying a tiltable front-feed paper-deflector, a stud carried by said arm, an idle lever pivoted to said downturned flanges and having the free end of its rear arm arranged in the path of said stud, and a feed-roll releasemechanism having a stud arranged in the path of the free end' of the front arm of said lever.

16. A typewriting machine comprising, in combination, a platen-frame with two end plates, a revoluble platen journaled in said end plates, a releasable downwardly and forwardly inclined paper-table shiftably mounted on the back portion of said platen-frame behind said platen, said table having a lower portion curved in conformity with the platen, said table being shiftable in the direction of its inclination so that its curved portion may be shifted to and from the platen, rear spring-paper-fingers supported between said end plates and permanently bearing on said platen, a bail pivoted between said end plates to swing about an axis behind the platen, stops for said bail mounted on said end plates, 2. second bail pivoted between said end plates to also swing about an axis behind the platen, top feedrolls adjustable on the cross-rod of said lastmentioned bail, a front-feed paper-deflector pivotally mounted for tilting on the cross-rod of the first-mentioned bail, and releasable bottom feed-rolls operatively connected with said papertable and with said deflector-bail.

17. A typewriting machine comprising, in combination, a platen-frame with two end plates having a flanged top edge, a revoluble platen, a row of rear paper-fingers, a releasable papertable, releasable bottom fed-rolls, a front paperfeed deflector, releasable top feed-rolls, and on the right-hand end plate a bracket with two upturned ears and one downturned flange secured to the flanged top edge of said end plate, three superposed studs fixed to said end plate near the front part of said platen, three studs fixed to said downturned flange at the rear of said platen, a trunnion journaled in said two ears, an arm adjustable in said trunnion, and forming part of a swingable bail carrying said top feed-rolls, a wedge-member adjustably mounted on said trunnion between said ears, a leaf-spring adjustably fixed on said flanged top edge and co-operating with both sides or faces of said wedge-member, a second leaf-spring adjustably fixed at the back of said flanged top edge, for controlling said rear paper-fingers, an interchangeable noise-deadening stop mounted on one of said last-mentioned three studs, an arm pivoted on another of said three studs and forming part of a swingable bail carrying said front deflector, two studs fastened to said last-mentioned arm, an idle lever mounted on the last of said three studs and having a rear arm in the path of the lower stud carried by said bail-arm, a feed-roll-release crank-lever mounted on the upper first-mentioned stud, a link pivoted to said crank-lever having its pivot in the path of the front arm of said idle lever, a detent pivoted on the lower first-mentioned stud, a spring connecting the lower end of said detent to said downturned flange, a ramp and two notches formed, on said detent and cooperating with the upper stud carried by said bail-arm, a lever floating on the stud carrying the noise-deadening stop, a pivot connecting the front end of said floating lever to the upper end of said detent, a spring connecting the rear end of said floating lever to said downturned flange, a cam-member clamped on said lower firstmentioned stud and fastened on the intermediary first-mentioned stud, a cam-follower carried by said front deflector and co-operating with said cam-member, and a spring urging said camfollower against said cam-member.

18. In a front-strike typewriting machine, the combination with a revoluble platen and a platenframe, of a bail having side arms pivoted to the platen-frame at a point behind the platen, said bail including a pendent front-insertion flap at the front of the platen, and tiltably pivoted between said side arms, spring-means holding said bail up against a stop in the platen-frame to normally keep the flap above the printing line, said bail being lowerable to bring said flap to sheet-inserting position, a cam carried by the platen-frame anico-operating with the end of said flap, and a spring-device pressing said flap against said cam, said cam being formed to keep the lower edge of the flap predetermined distances from the platen at the upper and lower positions of the bail.

19. In a front-strike typewriting machine, the combination with a revoluble platen and a platenframe, of a bail having side arms pivoted to the platen-frame at a point behind the platen, said bail including a pendent front-insertion flap at the front of the platen, and tfltably pivoted between said side arms, spring-means holding said bail up against a stop in the platen-frame to normally keep the flap above the printing line, said bail being lowerable to bring said flap to sheetinserting position, a cam carried by the platenframe and co-operating with the end of said flap, and a spring-device pressing said flap against said cam, said cam being formed to keep the lower edge of the flap predetermined distances from the platen at the upper and lower positions of the bail, said cam also including a stop, limiting the downward movement of the bail to sheet-inserting position.

20. In a front-strike typewriting machine, the combination with a revoluble platen and a platenframe, of a bail having side arms pivoted to the platen-frame at a point behind the platen, said bail including a pendent front-insertion flap at the front of the platen, and tiltably pivoted between said side arms, spring-means holding said bail up against a stop in the platen-frame to normally keep the flap above the printing line, said bail being lowerable to bring said flap to sheet-inserting position, a cam carried by the platen-frame and co-operating with the end of said flap, a spring-device pressing said flap against ,said cam, said cam being formed to keep the lower edge of the flap predetermined distances from the platen at the upper and lower positions of the bail, and a spring-pressed detent-arm engaging said bail to hold the same in its lowermost position.

21. In a front-strike typewriting machine, the combination with a revoluble platen and a platenframe, of a bail having side arms pivoted to the platen-frame at a point behind the platen, said bail including a pendent front-insertion flap at the front of the platen, and tiltably pivoted between said side arms, spring-means holding said bail up against a stop in the platen-frame to normally keep the flap above the printing line, said bail being lowerable to bring said flap to sheetinserting position, a cam carried by the platenframe and co-operating with-the end of said flap,a spring-device pressing said flap against said cam, said cam being formed to keep the lower edge of the flap predetermined distances from the platen at the upper and lower positions of the bail, a spring-pressed detent-arm engaging said bail to hold the same in its lowermost position, and a latch-device for holdingsaid detentarm in inefiective position.

22. In a front-strike typewriting machine, the combination with a revoluble platen and a platenframe, of a bail having side arms pivoted to the platen-frame at a point behind the platen, said bail including a pendent front-insertion flap at the front of the platen, and tiltably pivoted between said side arms, spring-means holding said apogee? bail up against a stopin the platen-frame to normally keep the flap above the printing line, said bail being lowerable to bring said flap. to sheet-inserting position, a cam carried by the platen-frame and co-operating with the end of said flap, and a spring-device pressing said flap against said cam, said cam being formed to keep the lower edge of the flap predetermined distances from the platen at the upper and lower positions of the bail, said cam being further formed to permit the lower edge of the flap to lie close to the platen in an intermediate position of the bail, said edge thereby serving as a sheet-aligning gage.

23. In a front and rear insertion front-strike typewriting machine having a platen and lower feed-rolls, the combination with said platen, of a top feed-roll bearing on said platen, means mounting said top feed-roll so that it may be cast off for positioning a rear-inserted work-sheet thereunder, and a shield standingrin front of said top feed-roll and reaching close to the platensurface to prevent a front-inserted sheet, gripped between the platen and lower feed-rolls from being rolled under the top feed-roll, said shield being arranged so as to be cast off and restored with said top feed-roll.

24. In a front and rear insertion front-strike typewriting machine having a platen and lower feed-rolls, the combination with said platen, of a top feed-roll bearing on said platen, a bail including a cross-rod, said top feed-roll being mounted on said rod so that by swinging said bail, said top feed-roll may be cast oil for positioning a rear-inserted work-sheet thereunder, and a shield-plate standing in front of and reaching close to the platen-surface to prevent a frontinserted sheet, gripped between the platen and lower feed-rolls, from being rolled under the top feed-roll, said plate having at its ends rearward extensions keyed to said cross-rod so that said shield-plate is cast ofi and restored with the top feed-roll.

25. In a front and rear insertion front-strike typewriting machine having a platen and lower feed-rolls, the combination with said platen, of a top feed-roll bearing on said platen, a bail including a cross-rod, said topfeed-roll being mounted on-said rod so that by swinging said bail, said top feed-roll may be cast ofi for positioning' a rear-inserted work-sheet thereunder,

and a shield-plate standing in front of and reaching close to the platen-surface to prevent a frontinserted sheet, gripped between the platen and lower feed-rolls, from being rolled under the top feed-roll, said plate having at its ends rearward extensions keyed to said cross-rod so that said shield-plate is cast ofi and restored with the top feed-roll, said top feed-roll being laterally retained between said rearward extensions of the shield-plate.

26. In a typewriting machine, the combination of a revoluble platen, a platen-frame having at each side a pair of ears' spaced apart in the direction of the platen-axis, a U-shaped bail having a cross-rod carrying a top feed-roll to bear on said platen, pivoting means for said bail joumaled in said ears, the side legs of said bail being secured to said pivoting means, a journal of said pivoting means extending through each pair of ears, a detent-member secured to said journal and disposed between the pair of ears, and a spring-device mounted on said platen-frame and engaging said detent-member, the latter having a formation whereby the bail is held by the spring-device in cast-ofi position and having another formation angularly spaced from the first formation whereby the bail is urged by the spring-device to rotate and thereby press the feed-roll upon the platen, the second formation becoming efiective when the bail has been swung from its cast-ofi position to bring the feed-roll upon the platen.

27. In a front-strike typewriting machine, the combination with a revoluble platen and a platenframe, of a front-insertion flap, means mounting said flap to extend lengthwise of the front of the the connection of said arms to said flap being ar-' ranged to enable the flap to tilt about an axis above and parallel to its lower edge, and a camdevice, operative to tilt the flap about said lastmentioned axis as the fiap is shifted, to automatically place said lower flap-edge a predetermined WILLIAM F. HELMOND.

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