US1679845A - Typewriting machine - Google Patents

Description

Aug 7, V

J. WALDHEIM TYPEWRITING MACHINE FiledAug. 16, 1924 iii did

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This invention relates to improvements in such class of typewriting machines as the standard Underwood typewriting machine, wherein provision is made for positioning upon the platen thereof two or more worlrsheets, one of which may be a checlr, and the other a memorandum or record-sheet de signed to receive duplicate typed impressions of certain entries made on the checlt.

in such machines it is usual to provide, in addition to the main ribbon which vibrates across the printing line of the platen, an auxiliary ribbon which is typed upon simultaneously with the main ribbon, and whlch serves to reproduce typed impressions upon a diderent work-sheet than that typed upon through the medium of the main ribbon. This auxiliary ribbon is ordinarily interleaved between the foregoing work-sheets in some previous devices, spring fingers were employed to apply slight pressure yieldably against the auxiliary inlnrihbon to hold it snugly against the platen at the printing line thereof, these fingers engaging the front of the ribbon. In such devices also, yieldable or spring supports were provided at theend plates of the platen-frame for the purpose of holding under tension a length of a ribbon-shield to overlie the auxiliary ink-ribbon.

The present invention provides means for feeding a ribbon-shield longitudinally with the ribbon to assure that fresh portions of this shield will be advanced simultaneously with the auxiliary ink-ribbon, At the same time, the auxiliary ribbon itself is disposed over the spring fingers which are usually provided for the purpose of engaging the marginal portions of the work-sheet to press the same against the platen, instead of being positioned as heretofore under these fingers where it was likely to smudge the work-- iheet when raised away from the printing ine.

Une feature of the present invention is to provide a simple, inexpensive, and highly cfl icient device, for maintaining in proper overlapping relationship with the auxiliary ribbon a ribbonshield positioned in front thereof, and performing the function of preventing the outer work-sheet, which is typed upon by the main ribbon on one side, from receiving oflset typed impressions on its other side through the medium of the aux iliary ribbon positioned thereadjacent. The

present invention aims to rovide mechanism for winding both the anti iary ribbon and its shield from one spool onto another, thereby always maintaining the auriliary ribbon and its shield in properly fed relation relatively to the printing line of the machine.

A further feature of the present invention is to provide means for preventing the analliary ribbon from being drawn down below the printing line by the WOl'lt-Sll@tlll$ as the platen is being reversely rotated, as occurs when the work-sheets are being retracted on the paper-shelf1 The means provided to perform this function co-operate with the spring fingers provided for clamping down the worksheets onto the platen, which fingers may be temporarily raised when it is desired to remove or arrange the worlrsheets relatively to the platen,

The present invention finds embodiment particularly in a machine having auniliary ribbon mechanism, such as is disclosed in the application of Jesse it. Ti. @mith, Serial No, 680,1t5 l, tiled December 1%, i923, or similar types of machines. Tn connection with such a machine, the auriliary ribbon is mounted upon a frame, which is elevated, in one position, so as to dispose the auxiliary ribbon above the printing line of the machine, and is depressed, in another position, so as to be located directly at the printing line, Tn the same machine, provision is made during the depression of the device carrying the ribbon for actuating the ribbon spools, which feed along fresh surfaces of the auxiliary ribbon. The present invention, in so far as it is edective to simultaneously feed the auriliary ribbon and its ribbon-shield, is mounted upon a swinging de vice carrying the ribbon spools and the paper-fingers, having ribbon-guards forming a part thereof,

Uther features and advantages will hereinafter appear.

Tn the accompanying drawings,

Figure l is a front elevation, partly in section, of a typewriting machine carriage showing my invention applied thereto.

Figure 2 is a transverse sectional eleva tion taken on line 9t-Q of Figure 1, through the carriage and the platen,

Figure 3 is a transverse sectional elevation taken on line 33 of Figure T.

Figure l is a fragmentary perspective view of the platen and the carriage, showing ill till

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ltili a paper-finger and a ribbon in operative position thereupon.

Figure 5 is a diagrammatic end view of a platen, showing the main and auxiliary ribbons located at the printing line, and also showing the ribbon-shieldin operative position.

Figure 6 is a view similar to Figure 4, but shows a modification where the paper-finger and the ribbon-guard are formed in a single piece. I

Figure 7 is a front View of the right-hand ribbon spool, arranged to separate the ribbon from the shield by providing a separate spool for each.

Figure 8 is a detail view showing a pair of interlocking ribbon spools.

Referring to the drawings, which are merely illustrative of the present invention, 10 designates the main ribbon mounted in a ribbon-carrier 11, which vibrates the ribbon to cover the printing line of the platen 12, said platen having a knob 12 by which it can be rotated in either direction. The typebars 13 carry type-surfaces 14, which impinge upon the main ribbon 10 in the usual manner. 15 designates the platen-axle, 15" the platen-frame, and 16 the usual paper feed-rolls.

An auxiliary ribbon 17 extends longitudina-lly of the platen along the printing line thereof, and is arranged to have its opposite ends project beyond the ends of the platen, where the ribbon ends are trained upon spools 18 operatively journaled in brackets 19 secured upon the carriage, the base plates 20 of said brackets being secured upon the carriage frame by fasteners 21.

22 designates a rock-shaft having its ends rotatably journaled in the brackets 19. The end plates of the platen-frame are designated 23, and the ends of the auxiliary ribbon 17 after leaving the s ools 18 pass over idle rollers 24 operative y mountedupon guide-plates 26 stationed adjacent the ends of the platen and formed with oppositel and diagonally inclined slots througi which the auxiliary ribbon 17 is threaded whereby the path of the ribbon is changed from a vertical to a horizontal direction of travel, so that the intermediate stretch of this ribbon between spools is disposed to travel horizontally along the printing line of the platen.

27 designates a spool shaft engaging in the hub cap 28, being detained in the latter bymeans of the screws 32 tapped into the hub cap 28, spring pressure being applied against the sides of the spools 18 by the usual spring-brakes 29 held in position by knurled knob 30. 31 designates a ratchetwheel which is secured to'rotate with each of the spools 18. The end plates 36 are held fast on a bushing mounted upon the rockshaft 22. A hub (not shown) encircles the bushing 35, being secured to shaft 22. A bell-crank lever-handle 39 has the arm 40 which terminates in a finger-piece 41. This lever-handle 39 is fast on a bushing (not shown), which also encircles the bushing 35. A spring 42 is arranged to restore the leverhandle 39 to a normal position aften it has been actuated in a manner hereinafter explained. This spring is secured at one end upon a pin 43, which is fixed on the lever handle 39, and is secured also on one of the end plates 36 by a pin designated 43. The pin 43 works in a segmental slot 44 formed upon the lever-handle39. A hub 46 is sooured to bushing 35 by screws 37, and carries a crank-arm 38 having a cam of such a construction that it has an upper cam recess 47 and a lower cam recess 48. 49 designates a detent roll working in either of said recesses 47 or 48 accordingly as the leverhandle is lifted or depressed. So far mechanism has been described which is covered in the above-mentioned application of Jesse A. B. Smith, Serial No. 680,154, and forms no part of the present invention. The ratchetwheel 31 of one of the spools is actuated by means of feed-pawls v and 56 operatively engaged by the lever-handle 39, which, through suitable transmission mechanism, including the sleeve 35, serves to transmit motion to other feed-pawls (not shown) that exert a reverse feeding movement upon the ratchet-wheel mounted upon the other spool, at the opposite end of the platen, whereby the feeding direction of the auxiliary ribbon may be reversed. Such a ribbon-feeding and ribbon-reversing mechanism is shown in the pending application of A. G. F. Kurowski, filed February 5, 1924, Serial No. 690,705.

Spring-paper-clamps or guides are provided for holding the work-sheets A and B fast upon the platen. These spring-clamps consist of fingers 57 having bearings 58 in which are journaled feed-rolls 70. The shaft 60 extends longitudinally above the platen 12 upon which are mounted a pair of U- shaped bearing members 61, each being similar in construction. The U-shapcd bearing members 61 are formed with the legs 62 held against longitudinal movement upon the shaft 60 by means of the collars 3 and 64 held fast on the shaft by screws 65. 66 designates a coil spring engaging the shaft 60 having one end secured fixedly on an adjustable collar 67. 68 designates an arm formed as a continuation of one of the legs 62 of each of the bearing members 61. and is limited in the extent of movement impressed upon it by the spring 66 by means of the head 69 formed upon one of the screws 65, so that the pressure of the spring is caused to react upon the fingers 57 and cause the worksheets to hug the platen, especially at the printing line of the machine.

U-shaped yokes or arms 71 serve as a lli ltl

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nvents means for axially supporting the ends oil the shalt or rod 60 relatively to the spools l8, and have bearing ends 72 aligned with the shaft 60 and journaled within brackets 73 carried by the platen-trams whereby both shall and yolres may be rocked as a unit. The lingers 57 are secured upon the braclrets 59 by means of itasteners 'Zl, and the braclrets 59 are secured in turn by lasteners ll upon the ll-shaped bearing members bl.

The present invention in so tar as it is associated in function with the fingers 5'? consists of hooked-shaped members 75 mounted upon the lower extremities of the lingers 57., and secured by fasteners 75", so as to provide u 3wardly-extending guard arms to projecting parallel to the lingers til in the same curved plane therewith and laterally thereol and termed concave-convex or curved in conformity with the contour of the platen. ln Figure ti the lower portion oi? the finger 5'? is bent baclr upon itseljt, as at W, producing at this point a loop, the ex tension or which talres the term or an up wardly-extending guard arm 78 in longitudinal alignment with the linger 5?. ln either term of these hooked-shaped members it will be readily seen that the auxiliary ribbon ll is supported by these hooked-shaped members, between the two ribbon spools, as shown. in Figure against displacement relative to printn' line, when the platen is reversely rotated, especially when the stretch of ribbon in tront ot the platen is long, as, tor example, in a long-carriage machine. lln this manner the hoolredshaped members provide under supports :tor the auxiliary ribbon l7, and also serve to support a non-inlring web or shield 79, about to be described.

lnmultiple-ribbon machines there is a tendency or the outermost work-sheet to receive otl'set typed impressions trom the auxiliary ribbon, interposed between the worlesheets. To prevent this offsetting from the auxiliary ribbon, a web or shield 79 is provided in the present invention, which is arranged and po sitioned as shown, particularly in ll igure l,

' where the shield is supported so as to prolid till

ject coextensively inlength and in longitw dinal alignment with the auxiliary inlo ribbon 17, so that, when the type-bars 13 pert'orm their typing by means oil the main ribbon 10 upon the outer worlosheet A, the impact oil the typefaces ll upon the aux-- iliary ribbon 17 will reproduce these typed impressions simultaneously upon the other worlosheet B held against the platen, the shield 79 between the worlr-sheets preventing offsetting oil the auxiliary ribbon to the baclr surtace oil the work-sheet A, as would be the case it the shield were not present.

lln the present invention it is proposed to teed the shield and inking ribbon at the same time and in common, on and oil spools,

which wind up the ends ot" the ribbon and shield. llhis may be accomplished in Va rious ways.

In Figure l the same spools l8 serve as unitary means tor feeding and taking up the opposite ends of the ribbon and shield. llt has already been stated that the inlr-ribbon 17 and web l9, after they pass through the diagonal slots 25 inthe guide-plates 26, are changed in direction trom a horizontal to a vertical plane, and then passed over the idle rollers 24; in overlapping relation, so that both stretches oil ribbon and web are wound or unwound overlappingly upon or oil lrom the spools l8, and so that the intermediate stretches ot the ribbon and shield -web located at the printing line will be maintained in a horizontal position, be ing assisted thereby by the holders or llOOlCGCl- SlliljJE-dl guard members 75.

Another way of accomplishing the same result, in so tar as it is desired to feed along both stretches of ribbon and web the printing line oi the machine, is illustrated in Figures '2 and 'llhis term may be do sirable, because in some instances it r- 'uitc possible that the hilt oil the inking-ribbon might be absorbed by the shield-web when. both the inking-ribbon and the web are wound one over the other on the same spool. Again, due to the varying diameters of the rolls of shield-web and inlr-ribbon engaging the spools l8, there will be slight ditlerences in the lengths ot ribbon and shield-web ted along to the detriment of the web which would be unduly stretched and. might tear. While it might be possible to wax the shieldweb, which may be either paper or fabric, to prevent absorption or the inlr, etc., a better way is to provide a double spool con sisting or two spools $0 and 81 provided with drums 89, and 83 operatively fixed upon the spool shafts (not shown). The ratchetwheel as may be fixedly secured upon one of these double spools and the drums 8% and 83 ma I have their adjacent flanges secured together by dowels or fasteners til, as shown in ll igure 2%. ln place ot the guideplates 26, each having a single diagonal slot 25, shown in Figure l, a guidoplate 85 is constructed, so as to be provided with two parallel diagonal slots, designated respectively 86 and 87, both extending in the same direction and being disposed respectively in a plane with the spools 80 and ill. This permits the overlapping horizontal stretches olthe two ribbons l7 and 79 to be threaded through each of the two slots 86 and 87, so as to be changed in direction from a horirental to a vertical path of movement, so that the vertical stretches 17 and 79 ot the respective ribbon and web 17 and 79 may be wound upon their respective spools 80 and 8t. 7

lit will, ot course, be undestood that by llll llti

' be roc tact with the work-sheets held upon the platen after first disengaging the auxiliary ribbon and shield-web therefrom, or the ribbon and web may be raised above the printing line by means of the handle-bar 39 engaged through its finger-piece 41, in a manner well understood in the art. The sheet A may be a check which is typed upon for the purpose of making certain entries on one or more lines thereof, which entries are reproduced through the auxiliary ribbon upon the memorandum or recordsheet B. Now if there is any entry made on the check that it is not desired to reproduce for recording purposes on the recordsheet B in the form of a daily or monthly statement, the swinging frame consisting of the end-plates 36 is raised so as to position the roller 49 in the appropriate cam recesses 47 or 48 made to receive the same, so as to locate the swinging framein lifted position, and thus cause the ribbon and web 17 and 79 to be held out of printing-line position. When the check is typed upon the next line no reproduction of typed impressions will be made upon the record-sheet B. Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, 1 claim:

1. in a typewriting machine, the combination with a rotatable platen and a length of auxiliary typewriter-ribbon disposed lengthwise 0 said platen at the printing line thereof, of two adjustably mounted paper-guides! each guide including a bodyportion disposed to press against the platen and pass under said ribbonyr and an upwardly-extending finger positioned a short distance laterally therefrom, said finger being disposed over said ribbon for holding it closely against said platen between said guides, both said body-portion and said finger curvinrr in conformity with the contour of the platen.

2. In a typewriting machine, the combination with a rotatable platen and a length of auxiliary ribbon disposed lengthwise of said platen at the printing line thereof, of two laterally adjustable paper-guides, each guide including a finger arranged -parallel thereto for holding the portion of said ribbon intermediate said fingers closely against said platen and for supporting the ribbon against being moved downwardly below the typing position, said guides being arranged between said ribbon and the platen, to bear directly against the work on the platen,

3, In a typewriting machine, the combination withca carriage, a platen, a rod parallel to said platen and revolubly mounted on sand carriage, and a length of ribbon disposed lengthwise of said platen at the printing line thereof, of two paper-guides mounted on said rod having their free ends disposed under said ribbon, and ribbonsupporting fingers fastened to said guides and disposed over said ribbon for holding it closely against said platen, intermediate the guides, said fingers being also arranged for preventing said ribbon from being moved downwardly "from typing position when said platen is reversely rotated, said guides being arranged between said ribbon and the platen, to bear directly against the work on the platen.

4:. In a typewriting machine, the combination of a rotatable platen, a pair of spring clamps operatively mounted for holding work-sheets against the platen, means at one end of the platen for raising and lowering said spring clamps together with respect to the printing line of the platen, and means fastened upon said spring clamps at their lower ends for holding an auxiliary ribbon closely against said platen at the prmtmg line.

5. In a typewriting machine, the combination of a rotatable platen, a swinging frame mounted thereover, spring clamps moving with said swinging frame and holding Work-sheets snugly against said platen, means exerting spring pressure upon said spring clamps, an auxiliary ribbon extending longitudinally of said platen, and an arm carried by each of said spring clamps and engaging said auxiliary ribbon for holding the portion thereof between said clamps closely against a worksheet on said platen and also holding said ribbon against movewent with said platen during the reverse rotation of said platen.

6. In a typewriting machine, the combination of a rotatable platen, means for reversely rotating said platen, a rod supported above said platen, paper-fingers pivotally mounted on said rod for movement towards and from the front of said platen, springs on said rod urging said paper-fingers against work-sheets engaging said platen, said paper-fingers being raisable above said platen to release said work-sheets, an arm mounted inwardly from and upon the lower end of each of said paper-fingers and extending upwardly in the printing zone of said platen, and an auxiliary ribbon supported intermediate its ends by said arms, and retained thereby against moving downwardly upon the reverse movement of said platen, and pressed closely against the platen.

7. In a typewriting machine, the combination of a platen, an auxiliary inking-ribbon, paper-guides for directing work-sheets around the platen, and means carried by each paper-guide to support the auxiliary inking-ribbon, including an L-shaped memneraeaa her having "one arm thereof secured to the free end of the guide, and the other arm thereof pointed upwardly parallel with, the uide b 8. A clamp fora typewriting machine in cluding a concavo-conveit body-portion for engaging a typewriter-platen, a work-sheetholding roller mounted on bent-up flanges of said body-portion, means at the upper end of said body-portion for adjustably mounting said clamp on a typewriter-carriage-rod, and a finger-member extending laterally from the lower end of said body-portion a short distance and then upwardly and alongside of said bodyportion to the line of said flanges.

9. In a typewriting machine, the combination with a rotatable platen and an auxiliary ribbon extending longitudinally of said platen at the printing line thereof, of bookshaped members mounted and arranged for supporting the central portion of said ribbon, spools arranged for supporting the op posits ends of said ribbon, means for raising said spools and said hook-shaped members together, to render the ribbon inoperative to the printing line, and means for feeding said ribbon forwardly with respect to said platen while restoring said ribbon to the printing line of said platen.

10. In a typewriting' machine, the combination with a platen, a rod supported above said platen and parallel thereto, an auxiliary ribbon extending lengthwise of saidplaten at the printing line thereof, and a shield overlying said ribbon and being (Bo-extensive therewith, of fingers adjustably mounted on said rod and arranged for holding a worlrsheet on said platen, and for holding portions of said ribbon and said shield in close contact with each. other and against said work-sheet, and for supporting said ribbon and said shield against movement down: wardly out of typing position.

11. ln a typewriting machine, the combination with a carriage, a platen, an auxiliary shielded ribbon extending lengthwise of said platen, spools mounted at the ends of said platen on which the opposite ends of said ribbon are wound, said spools being mounted on frames pivoted on said carriage to be swung upwardly, a guide on each of said spools for holding a stretch of said ribbon at the printing line, and a rod above said platen and parallel thereto and mounted on arms secured to the spool-frames for being' swung upwardly with said spools, of two curved clamps mounted on said rod and en gaging said platen, each of said clamps hav- 1ng a body-portion disposed under said ribbon, and a finger positioned inwardly from, and parallel to, said body-portion and engaging over said ribbon to hold the portion thereof between said fingers in close contact with a worksheet on said platen, the body portion of said clamps and said fingers also serving to raise and hold the central portion of said ribbon away from the printing line when said rod and said spools are swung up wardly together.

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