US2258769A - Typewriting machine - Google Patents

Description

TYPEWRITING MACHINE Original Filed April 25, 1938 2 Sheets-Sheet l g Q a h VM4M/ w Q ATTORNEYS Oct. 14, 1941. J K|TTE| 2,258,769

TYPEWRIITING MACHINE Original Filed April 25, 1938 2 Sheets-Sheet 2- .24, rut/8'5. 4'\

INVENTOR John JTKl'ffel,

gwym' ATTORNEYS Patented Oct. 14, 1941 TYPEWRITIN G -MACHI NE John JosepnKittel St. Albans ,N: Y., assignorto Royal Typewriten- Gompany, Inc., NewYork, N; Y., a conpprati nnflgewXorkr Original'applicatiom April 25, 1938, Serial No;- 204,235. Diwided -tand this:applicationflctober 19; 1939, SerialaNo:.'3.00,278si' canine-Q (or. 191-151) This application-is a division of myzcoz-pendingi b' lthekeyaleveraor the =spacetgbar; andiacreturn application Serial No. 2.04g235 for improvements. movementifromeleftitoiright. Suchtan escapein Typewriting machines, filed April? 1938i. mentimechanis'mz ishshown; foreexampleginzthe:

The invention relates-to typewritingmachines; Patent Numben 1,212,939; issuedr Januaryi 16; and more particularly to ribbon feeding. meehe: 1917,.ito GeorgesE; Handley anism for typewriting" machines; Mechanism 'Dhe carriage: includes-the usuali endsplatesgl embodying the present'i'nventionis, howevenees and": 2 in. which is journa-led platen 3;. and; pecially adapted for the feeding of" ribbons: or: alsomountedfonzthevcarriagesaretheeusual paper; strips of hecto graph or other kinds-of transfers apron. and: bottom;- feed-3 IOllfilSi (not: shown): for; medium in the use of Which it is-desirable to; m. feeding a master sheet Gbforwardlygandthences present a complete new-orunused 'portionof theupward yiin. front of:the:p laten.e Mountl d-ionlthe transfer medium, at the'printing line, for each: carriaaerisazbail-d including a-rearcrossbanfi new character typed in a line of typing. and: spaced: supporting; arms Ber- 55 connected 1' at" An object of the invention is to -providea their forwardends byrahbar:Thavingjournaled; ribbon feeding mechanism operable iii-response 151thereompressure;rollers fleikforrdirecting usual': to' actuation of a line-spacing lever-in amanner work, sheetsa (when such ar 1 sed): rearward yi to-feeda strip of fresh unused ribbon albng theoverstheyplaten;after theyshave p ssed above-the printing line of the'platen' corresponding subprinting 11118;, Thearms.66i extend from the stantially in length to the length of an average Cmssibar 1 rearwardly over? the: platen and-:are. typed line. 20- pivatally; connectedias at. 9-9tb. the upper ends" Other objects will become apparent from a & "1 f w h; in turn, are pivotallyr reading of the following description, theappended mountediasaat H. on the carriageiendipla i i claims, and the accompanyingdrawings; in (see Figure; 3):; Springs; I-2-interposedghetween, which: 7 the; arms: Biand: thelzcarriage A end'platesyurge the; Figure 1 i a top l '-v ie f a typewriting fifi arms: downwardly: S0: as yieldably to; hold; the; machine with some-parts omitted and showing pressu e rollers 8saga enst-usualzworki h fiifind mechanism embodying my invention applied h tter a ainst'zthesplatem Eormeciainteer lyt thereto;

Figure 2' r fragmentary tOp-p1 an1 e f les'on, whichiaxcombined line; spacinggandicarribbon feeding mechanism shown at the-1efthand riagemeturn; lever. I4: is pivotally; mounted: as: at; end 0f the typewriter carriage Figure 15 and; l51ancl'iisi connectedz torthe platen. 3: in; the usual drawn on an enlarged scale mannen by: means of a link; Iii connected: toa.

Figure 3 is a view insideor-end elevation as; rock arm e. latter; a y gapawl: lib-en viewed when looking in the direction of the; gageablei witlr.avratchet:wheel, lQJZQIlathE platen arro 3 i Figure 1, d drawnonanenl'argedf (seeflFigure 2). Thelever I 4 includesthe usual: 7 a handle. portionz which extends forwardly. so as;

scale;

Figure; 1 a,- se ti l vie -t k th qi to be positionedwithineasy reach off thezopere 4' 4 of Figure 2; ator.. Ribbonspools20-e2fl1arezshown mounted witlithejendplateJ is.;a;latera11yeextendingshelfr Figure 5 is an inverted section takenthe 011113116 main: frame in. the usual manner; a re:-

line 55 of Figure'4 and drawn on; areduced 4-9; V r i le': inking. ribbon. 21! beingadapted: to be scale with respect to Figure-4;and unwound'lfrom: one off the spools 2'0; andii wounds Figure 6 is a fragmentary'end elevationlook p other; as S' y-- ing in the direction of'the'a-rrow-6 in Figure l;

The drawings showone embodiment of the scribediismotlclaimed' per se asconstituting-the i ti as applied t a Royalistandard*type--ip1BSBniZ invention,- itbeing'understood;thatthe writing machine, but it isto-be'understood that;- invention comprises partszto behereinafter de-e mechanism embodying th i e ti scribed: and combinations of such parts with. applied to other typewriting-machinesi- The machine showninthe 1 drawings include's chine construction; a eady des ibed.

The typewriting: machine as; thuss far; dee;

eachmthen and-with the known: typewriting ma.-

a-stationary main frame and a carriagegen 5Q Although: the invention is not necessarily re, 7

erallydesignated B mounted-on the-main-fram stricted; to the use of ribbon; feed) mechanism, for reciprocatory movements in the usualman adapted m mounted 0 01 pp d to; yp

ner, viz an intermittent or step-by-step move-- writing; machinesz of. standard. on known con-Q ment from right to left which is effected bwa struction ituis desirable n any: cases toapply motor-and an escapement-mechanism actuated thei feedimechanisml to suchzmachines, and for end of the carriage, and the hectograph or other transfer medium ribbon 22 is arranged tobe fed from the roll along the printingline of the platen in a manner to be described. In order to protect the master sheet andto prevent it from being marred by the ribbon 22,-a'pair of spaced' guards 23 is adjustably mounted on the bail 34. The spring 35 tends to move the line spacing lever 4 in a clockwise direction as viewed in Figures 1 and 2. A stop 38, which extends upwardly from the plate 34, is engageable by the line spacing lever M for limiting the movement thereof under the urge of the spring 35.

Cooperating with the shelf l3 for mounting the feeding mechanism is an extension bracket forming a lower shelf 39 secured to the carriage end plate I as at 40-40. A shaft 4| extends through an aperture 42 in the shelf |3 and through an aperture 43 in the lower shelf 39. The shaft is formed adjacent its upper end portion with an enlargement 44, and immediately bar 1, being held in adjusted position on thebar by means of screws 24, as-more fully explained 3 in the copending application of George F. Hand'- ley, Serial Number 170,451. 1 The ribbon supply means D includes a mount ing bracket comprising. a vertically disposed plate 25 supported on the carriage end plate 2 by means of arms 26-26, and a ribbon-carrying spool 21 journaled on a stud 28 fixed to the bracket plate 25. A. nut 29. has" threaded.en-' gagement with the stud 28 and is adapted ad justably to press the spool 21 against 'a. frictional washer 38 for varying the resistance of the spool to rotation, and hence for varying the tension of the ribbon22.

In the form shown, the spool 21 is mounted in a vertical plane so as to reduce the over-all length of the carriage, and, in order to position the ribbon 22 properly along the printing line of the platen, it must be twisted partially. To this end there is provided a twisting and guiding means comprising a roller 3| rotatable about a horizontal axis and a guide member 32 which ispositioned in a vertical plane but which is inclined at an angle of substantially forty-five degrees to the horizontal. The ribbon 22 is led from the spool 21 underneath the roller 3| and. thence over the guide member 32, and after leaving the guide member 32 the'ribbon passes between fin-. gers 33 which maintain the ribbon properly positioned along the printing line of the platen.

The treated surface of theribbon 22 is disposed upwardly as it passes under. the guide member 3|. transfer medium off the ribbon, the guide member 3| preferably is mounted for free: rotation, and thereby any harmful rubbing of the treated surface of the ribbon is avoided.

The feeding means generallydesignatedE is mounted at the end of the carriageoppositelthat at which the ribbon supply means .is' supported. Some of the parts of the feeding means are.

plate 34 is, in the present construction; sup-l ported on top of the'shelf |3.' This, arrangement facilitates mounting of the ribbon feeding parts compactly under the shelf |3.1 A spring 35.

Hence, in order to prevent rubbing of the Accordingly a combined carriage returnis connected at one end to the line spacing lever as at 35, and is connected at' its other end :to

a. downwardly projecting part 31 of. the :plate above this enlargement with another. and smaller enlargement which abuts against the bottom face of. the shelf I3. A spacing sleeve 46 having an'ecc'entric portion 46 is mounted on the shaft 4| above the plate I3, and is adapted to be clamped against the plate by means of a nut 41 on the extreme upper end .of the shaft 4|.w The sleeve 45 may; beirotated about the shaft 4| to cause the eccentric portion 46 to cooperate as a stop with the line spacing lever 14 at selected different positions in order to adjust the extent.

of movement .of the line spacing lever required for proper cooperation with the link IS, the rock arm l1, the pawl. l8, and the ratchet I9. In order to effect an adjustmentof the; eccentric portion 46, the nut '41 is loosenedand-the sleeve 46 is turned, a fter which the nut is drawn up so as both tojlockthe eccentric 46 in adjusted position and at' the same'time to an,- chor the shaft 4| securelyto the shelf'l3.

A toothed or'serratedfeediroll 48 is mounted,

for rotation on the shaft 4| belowtheshaft enlargement 44 and; meshes with a feed roll49i which is journaled-on a headed pintle- 50 secured to an adjustable mount: or plate 5| carried by the .shelf l3 on the lower side thereof. The ribbon 22 is trained between and gripped by the rolls 48 and 49, and is fed by rotation-of the rolls in'a manner later-to bedescribed.

In order to facilitate placement of the ribbon between the rolls, the plate 5|, and hence-the pintle 50 and roller 49, are-mounted 'for movements towards and away-from'the fixedaxisroll 48. The plate 5| is mounted for both slid ing and pivotal movements with respect to the axis of the gear 48. As shown, the plate 5| is formed with an elongated slot' 52 which receives the enlargement 45 of the shaft 4|; The enlargement 44 of the shaft, however, overlaps the slot 52 so as to maintain the'inner end of the plate 5| against the lower side of the shelf |3. -The front edge 53 of the shelf I3 is slotted as at 54 and receives for sliding movements the outer end portion of the plate 5|, thereby maintaining the plate snugly against the bottomsurface of the shelf l3. Aspring 55 is connected at one end to a stud 56 on the plate 34, and is connected at its other end to a-stud 51, the reduced-lower end of which has threaded connection with the plate 5|. An eccentric 58 is held in place by the stud 51; and is positioned to engage the 'adja-' ing 'theribbon between them. In order to-lock accep ed the plate in its retracted position; the plateisformed with a notch- 69 "adapted to; cooperate with a notched: edge 6 l on -an extension fl of -the carriage end*platel-.' 1 I In operation, the feed roll ltd-is: rotated? during line spacing movement: of: the: platem andi drives the i dlerfeed-r0114 9-=-with' which ittmesli'es; the two cooperating t'o feed the ribbon 22 along the-print ing line l of the platen; T he means -fon eilecti'ng this rotary movement of the rolll48f-constitutes' an important feature of theinventiem l The feed 'rolls: 46 and 49 arearranged' 'to be operated whent-he carria ge retum lever l4lis -actuated to move the carriage'to =tlieright aftnthe typing of a line has been completed. 'I'hecarriage retu'rnlever l'4is formed 'with a rearwardly projecting arm or extension 63, the extreme rear end of which is T-shaped, and serves to mount a gear segment 64 which is secured as at 65 to the arm 63 of the carriage return lever, the pitch circle of the segment having its center coincident with the axis of rocking of the lever 14. The segment 64 is arranged to mesh with a small pinion 66 mounted on a pintle 61 supported by a bracket 68 secured to the shelf l3. A disc 69 is secured to the pinion 66 so as to rotate in unison therewith about the pintle 61. A driving pawl 10 is pivotally mounted on the disc 69 as at 1 I, and is arranged to engage the teeth of a ratchet 12 which is brazed to a large gear wheel 13 rotatable about the pintle 61. The arrangement is such that, when the pinion 66 and disc 69 are rotated in a counterclockwise direction as viewed in Figures 1 and 2, the gear 13 will be driven in th same direction through the medium of the pawl 10 and the ratchet wheel 12. The gear 13 is in constant mesh with the feed roll 48, so that the counterclockwise movement of the gear 13 will drive the feed rolls 48 and 49 in a direction to effect feeding of th ribbon or strip 22. In order to prevent rotation of the gear wheel T3 in the reverse direction, a check pawl 14 is pivotally mounted as at 15 on the shelf 39.

In operation, and assuming that the typing of a line has just been completed, the line spacing lever [4 will be actuated in the usual manner to effect line spacing movement of the platen 3 and also to return the carriage to its right hand position preparatory to typing a new line. This will result in rocking of the line spacing lever in a counterclockwise direction about the pivot l5, whereby the pinion 96 will be driven in a counterclockwise direction by the gear segment 64 so as to drive the feed rolls 48 and 49 through the medium of the disc 69, th pawl 10, the ratchet 12, and the gear wheel 13. The oscillatory segment 64 and other gears are so proportioned as to provide speed multiplying gearing between the line spacing lever and the feed roll 48, whereby operation of the line spacing lever effects a plurality of revolutions of the feed roll. The relative pitch diameters of the gear segment 64, the pinion 66, the gear wheel 13, and the feed roll 48 are such that this operation will result in the feeding of a relatively long strip of ribbon 22 corresponding substantially in length to the length of an average typed line so as to present a fresh portion of transfer medium ribbon along the line of typing before the start of each new line.

The typewriting machine disclosed herein embodies the invention in a preferred form, but it will be understood that various changes may be made in the construction and relative arrangement'? or the parts without departing fror'r-r the ihventiomas defined in the eiaim i m0 :t y r In a typewriting machine; acarriagee' 'a' platen journale'el thereon" fer line spacing movement's; 'a' line-spacing lever pi votally mounted on the carriage;;' a, ribbon feed roll 'journaled-on thecarriage;-- a piniomhavingdriving connection with said feed roll; and a -gear segment mountedforoscillatory rotar y movement togetherwithsaid -lihe -spacing l'evervab'out the pivo't 'o'fisaid- 1ine-spaeirig*lever"and mesliing' with said pini'or-i In a typewriting m-achine, acarriage; aplaten: jpur-naled thereon for-"line spacing movements;- -.a combined line spacing; and carriage return Iever= pivotal mounted-- on the carnag a ribbon feed roll journaled on the carriage; a pinion having driving connection with said feed roll; and a gear segment meshing with said pinion and being connected to the lever for conjoint rotary movement therewith about the pivot of said lever for imparting rotation to the feed roll during line spacing and carriage return movement of the lever, the diameter of the gear segment being relatively large as compared to the diameter of the pinion.

3. In a typewriting machine, a carriage; a carriage return lever pivotally mounted on the carriage and having a handle portion extending forwar-dly of the lever pivot; a ribbon feed roll mounted on the carriage; and speed multiplying gearing interposed between the feed roll and the carriage return lever for imparting a plurality of revolutions to the feed roll in response to pivotal movement of the lever when the latter is operated to effect return movement of the carriage, said gearing including a pinion mounted to rotate on an axis behind the carriag return lever pivot and having driving connection to said feed roll, a gear segment meshing with said pinion, and an arm secured to said carriage return lever and extending rearwardly of the pivot thereof for mounting said segment to move together with said lever behind the lever pivot.

4. In a typewriting machine, a carriage; a carriage return lever pivotally mounted on the carriage and having a handle portion extendin forwardly of the lever pivot; a ribbon feed roll mounted on the carriage; and speed multiplying gearing interposed between the feed roll and the carriage return lever for imparting a plurality of revolutions to the feed roll in response to pivotal movement of the lever when the latter is operated to effect return movement of the carriage, said gearing including a pinion mounted to rotate on an axis behind the carriage return lever pivot and having driving connection to said feed roll, a gear segment meshing with the pinion, an arm secured to said carriage return lever and extending rearwardly of the pivot thereof for mounting said segment to move together with said lever behind the lever pivot, and a oneway drive connection between said pinion and said feed roll.

5. In a typewriting machine, a carriage; a carriage return lever pivotally mounted on the carriage to rock about a vertical axis and havin a handle portion extending forwardly of the lever pivot; a ribbon feed roll mounted on the carriage to rotate about a vertical axis; a pinion mounted on the carriage to rotate about a vertical axis behind the lever axis; driving connections between the pinion and the feed roll; a carriage return lever extension fast with the carriage return lever and projecting rearwardly of the lever axis to rockwith-the lever about its .vertical axis; and'a gear segment fast on the end of said extension remote from and behind said carriage return lever axis and meshing with said pinion, the pitch circle of said gear segment having its center coincident with the carriage return lever axis of rocking.

6. In a typewriting machine including a carriage and a platen journaled thereon for linespacing movements, mechanism for feeding ribbon in such relation to typing operations as to position a fresh unused ribbon portion for typing impressions substantially at all times, said mechanism comprising a combined line-spacing and carriage return lever mounted on the carriage; a ribbon feed 'roll journaled on the carae syeo riage; means'fortraining ribbon along the writing line of the platen and to said feed roll; and speed multiplying gearing interposed between and drivingly connecting the feed roll and the lever forrimparting a plurality of revolutions to theifeed rollvin response to a single movement of the lever when the ,latteruis operated to effect line-spacing movement of the platen and return movement of the carriage, the diameter of the feed roll, the length of the platen, and the ratio of said gearing being so related to each other that said operation of said lever will etfect the feeding of a strip of ribbon corresponding substantlally in length to the length of an average typed line.

. JOHN JOSEPH KITTEL.

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