US1493398A - Typewriting machine - Google Patents

Description

a May 6 1924. 1,493,398

J. A. B. SMITH TYPEWRITING MACHINE Filed Dec. 4, 1919 F|'e.-2.- B FIGJ.

ATT/RNEY.

Patented May 6, 1924.

UNITED s'r rns I I v eases A mi a JESSE A. .B. SMITH, OF STAMFORD, CONNECTICUT, ASSIGNOR T UNDERWOOD TYPE- WRITER COMIANY, OLE NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE'WRITING MACHINE.

Application filed December 4, 1919 Serial No. 342,496.

To all whom it may concevm Be it known that I, JESSE 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.

This invention 'relates to stencil-cutting, and is herein disclosed as applied to the cutting by the Underwood typewriting machine of suc wax and other stencils as are used in addressing, duplicating and other machines for reproducing typewritten work. It has been customar hitherto to out such stencils by actuating t e types in the usual way after removing the ribbon through which the types print, or after silencing the usual ribhon-vibrator. By thus eliminating the ribbon, the cutting of the stencil is made far more certain and the cut stencil is far clearer. Such stencils are, however, difficult to cut because of the fact that without the ink-ribbon the typed impression upon the stencil is practically colorless, thus making it difficult for the typist to follow the types in their operation and correct any errors.

According to the present invention, the types of the ordinary ribbon-printing typewriter may be inked before striking the stenoil, thus concomitantly cutting the stencil and imprinting upon the stencil a colored impression, even though theribbon'is silenced. This colored impression renders it easy for the typist to follow the typed impression upon the stencil-sheet and thus correct any errors.

The stencil-sheet,hitherto spoken of, may be only a single sheet, such as is commonly used in addressin machines, or may be a compound sheet w ich includes not only the stencil-sheet proper, but also the covering sheet adapted to assist in cutting the stencil. In cutting a wax stencil, for example, a covering sheet is frequently placed in front of the stencil-sheet proper, and serves toextract the waxfrom the stencil when removed at the end of the stencil-cutting operation.

This covering sheet may thus show an inked v versal bar 16, carrymg 1t rearwardlyon liZS impression which is readily readable.

In cutting and printing the stencil, according to the present. invention, in the type-bar typewritingmachine like the Underwood, I providev an auxiliary inking device in the form of a roller, which each type strikes before it reaches the printing point.

The type is preferably allowedto have a free path to travel at a high speed immediately' before striking the stencil-sheet, after the inking of the type has taken place,

to insure a complete and clear impression of the type upon thesheet. The inking roller forinking thetypes in the stencil operation is silenceable and for this purpose maybe removably attached to the ordinary Underwood typewriting. machine, so that the machine may be used for ordinary typewriting" when the ribbon-vibrator is actuating in the usual way. When stenciling is being, effected, the inking roller or other devices may be attached to the machine, and the usual handle for silencing the ribbon-vibrator'may" be made effective, with the result that'the ribbon will not be lifted to the printing point. 7

Other features and advantages will here-' inafter appear.

In the accompanying drawings,

Figure l is a sectional side view, largely diagrammatic, of anUnderwood typewritas applied thereto.

so mg mach1ne,show1ng the present invention Figure 2 is a face view of atype, showing its comparatively sharp face.

Figure 3 is a fragmentary perspective view of the parts seen in Figure 1.; t

Figure 4' is a fragmentary front view ofa modification of Figure 1.'

F'gure -5 is a fragmentary "front view of the parts, seen in Figure 4.

Figure 6 is a fragmentary a wax stencilsheet. Figure 7 is a fragmentary stencil'address-car In the Underwood typewriting machine, the key-actuated type-bars lOswing up-. wardly and rearwardly' to. cause: upper and front v view of "lower-case types 11 and 12 to strike upon the' work-sheet 13 passed around the platen 14. The types are of the knife-edge variety,

. to make clear impressions through the ink ribbon. In the normal writing operation,

front View of a when any type-bar l0 approaches the platen 14a hee'l'15 of the type-bar strikes the unirocker17. As the universal bar thus moves rearwardly, it actuates the usual dogs '18 I also actuates the ribbon-vibrator 20, which is pivoted upon the shift-frame by a pivot pin 21. To actuate the Vibrator, the unlversal bar 16 carries the actuator 22, which is adapted to engage one or the other of two pins 23 or 24 upon the upper extension 25 of the vibrator 20. The pins 23 and 24 are set at different distances from the pivot point 21, so that the pin 24 gives a small throw to the vibrator, while pin 23 gives a comparatively large throw, with the result that the pin 23 lifts the ribbon 26 high enough to bring the lower stripe 27 of the ribbon between the type 11 or 12 and the worksheet 13. To lift the ribbon this way, the

ribbon is threaded through the usual carplaten to uppercase position when desired.

In order to shift the actuator 22 to enable it to engage either pin 23 or 24, there is provided a rock-shaft 34 carrying a rock-arm 35 connected by a link 36 to the actuator in the customary manner, one form of which is shown in the patent to Frank A. Cook, No. 926,050, dated June 22, 1909. V

The structure is such that the actuator 22 always moves backward and forward with the universal bar, but is shiftable laterally thereon to engage either of the pins 23 or 24. To rock the rock shaft 34, there is provided a double key, having ends 37 and 38, which serves to rock the shaft 34, the ends usually being colored to indicate the color of the ribbon stripe they make effective.

In addition to actuating the ribbon-carrier 28, the universal bar 16 may vibrate idly so that the carrier 28 fails to rise, with the result that the type 11 or 12 strikes directly upon the worksheet 13 for the purpose of cutting a stencil. For this purpose the machine is provided with a ribbon-silencing handle 39 as described in said patent, and adapted to engage the pin 40 to hold the shaft 34 at the stcnciling position, in which position, as set forth in said patent, the actuator 22 is clear of both pins 23 and 24 and therefore the carrier 28 fails to rise when the type-bar 10 rises, and accordingly the ribbon 26 is notlifted to the printing point.

To enable the type 11 or 12 to be inked, inorder to both out and print a stencil, although the ribbon 26 does not rise to the printing point, I provide an auxiliary inking device in the form of a roller 41, Figure 1. This roller may be of suitable material, light enough to swing easily when the types strike it, such as is shown in the patent to George R. Cornwall, No. 614,090, dated November 15, 1898. The roller, shown herein, is built up of enough such rollers to make it wide enough to ink the type of any one of the type-bars actuated, including the wing type-bars, as it approachesithe platen. The roller 41 is journaled upon the light shaft 42, forming, with arms 43, a bail, which is pivoted by the swinging arms 43 to a U-bar 44, forming a supporting bail, so that the roller 41 returns to its normal position by gravity This supporting bar or bail 44 has turneddown ends 45' forming fixed extensions adapted to fit into sockets 46 in the segment 47 in which the type-bars 10 are journaled. The U-bar 44 is spread enough at its outer or closed end, so that all the type-bars 10 in printing swing inside of it and reach the usual type-guide 48 with the strokeunobstructed, except for the interposed suspended swinging inking roller 41. The roller 41.

swings freely on its arms 43, which are pivot: ed to the side arms of the U-bar 44 far enough behind the U bottom 49 to allow the typebar in descending to swing it out of the way. The bail bottom 49, however, is placed near enough the arms 43 to prevent any excessive throw of the roller 41. The U-bar 44 extends slightly upwardly at the front, as shown in Figure 1.

The arms 43 are arrested after the typebar passes the roller by the usual front rail 50. The inking roller may be shifted from the position in which it is effective to ink the types, and in the construction shown the U-bar 44 is readily removable, so that the machine can be restored for ordinary writing, after the stenciling operation, by removing the U- bar 44 and setting the silencing handle 39 to an idle position, and depressing, if necessary, the desired key- end 37 or 38. The usual detent 51 for the rock shaft 34 serves to hold the actuator 22 in one or the other of its effective positions.

It will be observed that the roller 41, in its suspended effective position, is about tangent to the line of movement of the lower-case type, it being found that the type is well inked by the roller when the swinging of the type-bar swings the roller rearwardly, so that it rolls over the whole surface of the upper and lower-case types 11 and 12.

It will be noted that the freely suspended inking roller 41 is normally located in the path of the type at a point substantially midway between the type at rest in normal position and the printing point on the platen. This inking roller, in the construction shown in the drawings, is shown as spaced somewhat farther from the printing point on the platen 14 in the arcof movement of the types 11' and 12 than it is from these types in their normal positions of rest.- By reason of this construction, the,

type-bar and type may accumulate sufii ci-ent momentum after the inking of the type to be effective to cut a clear stencil which will receive a printed impression from the inked type.

Instead of'the roller 41 there may be usedv shifting operation. The bar 56 is pivoted to swing up and down by an upturned end 57, approximately at the height of the roller 52, upon an upstanding bracket 58, fast to the frame 59 'of'the typewriting machine. To swing, the bar 56 at the case-shifting operation, the bar is bent inwardly behind the type-guide 48 and then downwardly and rearwardly to one side of the vibrator 20, and is made'fast by a bracket 60 to the shift-rail 32. The roller 52 is adapted to be swung by the actuated type-bar rearwardly and to the right ona substantially vertical pivot 61 on which the frame 53 is journaled; The roller is automatically returned to the Figure 4 or Figure 5 position in the'path of'the next type-bar by a'spring 62, which is anchored "to the bar 56 and draws on a lever 63 pivoted on the bracket 55 at 64,- and pivotally connected by a link 65 to an extension 66 of the frame '53, the connection being made'by a pin 67 Thus, the roller 52, aftereffectually inking the types just before they print, swings out of the way.

The typed impression in the caseof a wax stencil-sheet will often show clearest on a covering sheet 68, which is often used to overlie the wax stencil-sheet proper 69 and extract the wax from the stencil impression 70. The impression on the sheet 68, being of any desired color, shows clearly to the typist just what has been stenciled. In the case of the stencil address-cards 71, such as are often used in addressing machines, the typed stencil impression is delivered directly upon the stencil-sheet 72; and the fibres which extend across the stencil character, as well as the body of the stencil itself right next to the cut character, show the colored typed impression, thus rendering the stencil easy to read. It has been found that the types cut a better stencil when inked by a roller at the Figure 1 position than by a roller at the Figure 4 or v 5 position, apparently due to the fact that the type-bar momentarily loses some speed when striking a roller, and regains it if toe rest of the stroke is comparatively long.

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 v

1. In combination, a p-laten,-types to strike against the platen, a ribbon-vibrator normally effective to shift a ribbonto printing position each time one of'said types is actuated to strike against the'platem'me'ans to render said ribbon-vibrator ineffective when a stencil is to be cut, and inking means in the paths of the types whereby each type actuated for stencil cutting will be inked.

during its movement toward the printing point so as to impart its ink to the stencil while cutting the same, said inking'means mounted for disablement, to permit use of' said ribbon independently thereof,

2. In combination, a platen, types to strike against the platen, a ribbon-vibrator normally eflective to-shift a ribbon to printing position each time one of said types is actuated to strike against-the platen, means. to render said ribbon-vibrator ineifective when a stencil is to be cut, and inking means whereby each type actuate'd'for stencil cutting willbe inked during its movement toward the printing point so as to ink the stencil while cutting the same, said inking means comprising an inking rollerto ink a type striking the same, and pivoted arms to support said roller in the path of all'of said types to permit the roller to be swung out of the way, said roller being readily re- 'movable. i

3. In a front-strike typewriting machine,

the'combination with a platen", of a segment,

type-bars carrying types and journaled on" the segment, an inking roller for the typebars removably mounted on the segment,

arms upon which said roller is journaled,

and a bail upon which said arms are journaled, said bail comprising fixed extensions adapted to be seated in the segment.

4. In a front-strike typewriting machine, the combination with a platen, of a segment, type-bars carrying-types and journaled on the segment, aninking roller in front of the segment, arms on which it is journaled to be swung against gravity by an actuated type-bar, and extensions of said arms adapted to fit the segment to support the roller.

5. In a front-strike typewriting machine, the combination with a platen, of a segment, type-bars carrying types and journaled on the segment, a U-bar having an enlarged bottom extending forwardly from the segment, an inking roller, arms journaled on the bar and carrying said roller, and means for limiting the throw of the rollerj 6. In a front-striketypewriting machine, the combination with a platen, of a segment, type-bars carrying types and journaled on swinging arms upon which said roller is journaled, and'supporting arms upon which said swinging arms are journaled, said supporting arms being removably mounted on the segment.

7. In a front-strike typewriting machine, the combination with a platen, of a segment, type-bars carrying types and journaled on the segment, an inking roller in front of the segment,'swinging arms on which said roller is journaled to be swung against ravity by the type of an actuated type-bar, and supporting arms upon which said swinging arms are journaled, said supporting arms having extensions for engaging the segment to. support said roller.

8. In a front-strike typewriting machine, the combination with a platen, of a segment, type-bars carrying types and journa'led on the segment, supporting arms extending forwardly from the segment, an inking roller, swinging arms journaled on the supporting arms and carrying said roller to be swung againstgravity by the type of an actuated type-bar, and means for limiting the throw of said roller.

9. In a front-strike typewriting machine, the combination with a platen, of a segment, type-bars carrying types and journaled on the segment, supporting arms extending torwardly from the segment, an inking roller, and swinging arms journaled on the supporting arms and carrying said roller to be swung against gravity by the type of an actuated type-bar.

10. An inking device for a front-strike typewriting machine having normally forwardly-extending type-carrying type-bars swingable upwardly and rearwardly from a normal positionaofrest to the printing point on the platen, said inking device comprising, a bodily displaceable inking roller normally in the path of the types at alpoint substantially midway between the types at rest in normalpositions and the printing point on the platen, said roller being displaceable by g the type of an actuated type-bar as it swings from the normal position to the printing point. i 11. An inking device for a. front-,strik typewriting machine having normally forwardly-extending type-carrying type-bars swingable upwardly and rearwardly from a normal position of rest to the printingpoint on the platen, said inking device comprising a bodily displaceable inking roller normally in the path of the types at a point at least as far from the printing point on the platen as it is fromthetypes at rest in their normal positions, said rollerbeing dis placeable by the type of-an actuated typebar as it swings from the normal position to the printing point.

12. In a typewriter, and in combination, a plurality of type-bars, a universal bar, an inking ribbon normally oscillated by said universal bar to bev interposed between the paper and the type during printing, an inking pad for supplying a special ink, a support therefor, movable to remove the inking

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