US851142A - Type-writing machine. - Google Patents

Description

PATENTED APR. 23, 1907.

B. C. STICKNEY. TYPE WRITING MACHINE. IPPLIOATION FILED 00T.31. 1906.

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BURNHAM o. sT1oxNEY,`OE ELIZABETH, NEW JERSEY, AssieNOR To UNDERWOOD TYPEWRITER COMPANY, OE NEW YORK, N. Y., A CORPORATION OE NEW JERSEY.

TYPE-wRlTlNe MACHINE.

Specification of Letters Patent.

Patented April 23,-190'7.

Application filed October 31, 1906. Serial No. 341,476.

To all .whom it may concern: Y

Be it known that I, BURNHAM C. STICK- NE Y, a citizen of the United States, residing in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Type- Writing Machines, of which the following is a specification.

'lhis invention relates to that class of typewriting machines in which two ribbons are employed, either of which may be caused to vibrate to cover and uncover the printing point at the type strokes.

T e principal object of the invention is to provide simple, inexpensive and reliable means for enabling either ribbon to vibrate, so that either its upper edge or lower edge may overlie the printing point. Each ribbon may be provided with two color bands, whereby the operator is enabled to make a selection from four colors; or one of the ribbons may be of one color and may be economically used along both top and bottom edges.

In car ying out my invention, I preferably employ bipartite universal bar connected to the ribbon vibrators; or in other words two universal bars one for each vibrator and both controlled by the type keys. This feature of the invention is also applicable to machines in "which each ribbon has only vone color, and'is not adjustable to bring different widthwise portions thereof into use. Said 'universal bars I mount upon a single frame which -is -adjustable to different positions to bring either universal bar into use and simultaneously silence the other. Provision is also made for enabling either universal bar to be iven different strokes by the type keys for nnparting'different strokes to the ribbon vibrators. Provisi/on is further made for silencing both universal bars at willV to enable the printing of stencils, in doing which, the types should not strike through a ribbon. I preferably connect to each universal bar, means acting directly upon its associated ribbon-spools or spoolshafts, for winding itsribbon back andforth; and wheneither universal bar is silenced, its ribbon neither vibrates nor winds. I provide a single finger-piece connected to the frame on which the universal bars are mounted, together with yielding means for adjusting the Enger-piece in different positions. It is preferably adjustable to five positions, one for silencing both universal bars, and the remaining four for enabling either one or the other of the' universal bars to impart diHerent strokes to its associated vibrator. Other objects and advantages Will hereinafter appear.

In the accompanying drawings, Figure 1 is a sectional elevation from front to rear of a front-strike writing machine embodying my improvements; and Fig. 2 is a plan of the ribbon mechanism.

Types 1 mounted upon type bars 2 strike rearwardly against thefront side of a platen 3, the type bars being mounted in the usual manner upon a. segmental fulcrum rod 4, and operated in any usual manner, as for instance by links 5 and levers 6 bearing at their forward ends keys 7. The ribbons through which the types strike are superposed or arranged one behind the other, the front ribbon 8 being wound upon a pair of spools 9, 10, one at each side of the printin point, and the rear ribbon 11 being mounte upon a pair of spools 12, 13, between which the spools ofthe first pair are located. The front ribbon 8 is Athreaded through a vibrator 14 which stands up from the forward end -of a lever 15 fulcrumed at 16 upon the framework and having an arm 17 in rear of its fulcrum connected by a pendent link 18 to a universal bar 19. Said universal bar extends horizontally across the machine beneath the key lever 6, and is mounted upon the rear ends of a pair of arms 20, whichextend rearwardly from a rockshaft 21, which is provided with a spring 22 to hold the universal bar up, or to return it t o normal position after depression by the key levers. Said link 18 is attached at its lower end vto a crank 23, which is iixed upon the rock shaft 21 about `midway between the ends of the latter. Each of the key levers has a projection 24, to engage said universal bar 19, to force down the universal bar and lift the vibrator 14 while the key is moving the type bar to the platen. Said shaft 21 has pendent cranks 25 to reciprocate a pair of pawls 26 adapted to engage ratchet wheels 27 fixed-upon shafts 28, to which the spools 9 and 10 are fixed, whereby the ribbon 8 may be wound as well as vibrated by the universal bar 19. '1

IOO

The rear ribbon 11 is threaded through a vibrator 29 upstanding from the front end of a lever 30 pivoted at 31 to the framework, and having a rearwardly extending arm 32, which is connected by an independent link 33 to a crank 34 projecting from a rock-shaft 35 parallel with 21, and having at its ends for-` wardly directed arms 36 supporting av universal bar 37 in rear of the universal bar 19.

A The shaft 35 has a returning spring 37 a; un-

due elevation of the universal bar bei prevented by a stop 38 engaging a shoul er 39 on the lever 30. A similar stop 4() is prolvided to engage a shoulder 41 formed upon nor winds while the forward universal bar 19 is shown in position to be actuated by the keys to both vibrate and wind theforward ribbon 8. For convenience in manipulating the universal bars to silence them and to enable either one to be shifted to different working position, .l mount both upon a frame 48 which comprises a rock shaft 49 j ou'rnaled in the sides 50 of the framework of the machine, and having upon the exterior of said frame-` work an arm 51 provided with a finger-piece 52,' whereby the `frame 48 may be swung backwardl and forwardly. Upon the bottom of saidy a by a spring detent 54 to hold the frame in position for the universal bar 19 to be enga ed by the projection or step 24.

pon swinging the frame 48 forwardly by means of the handle 52 until the detent 54 `engages a notch adjoining the notch 53, the universal bar 19 will be carried forwardly to a position to be engaged by a sto 56 formed on each lever 6 just forwardly of) the step 24, but not projecting so far below the lever, whereby the lever does not engage the' universal bar during the first part of the keyI stroke, so that the movement im arted to the universal bar is lessened, and ence the ribbon vibrator 14 is given only a short up stroke, whereby the upper color band or edge thereof is caused to cover the printing point. It will be understood that when the parts are at the Fig. 1 position, the universal bar 19 and vibrator 14 are given maximum strokes,

' whereby the lower color band or edge of the ribbon 8 is caused to cover the printing point at the type strokes. It will also be understood that when the frame is swung for? wardly to engage the detent 54 with the notch 55 as just explained, the universal bar 37 will still remain out of use or not engafreable by the key levers. Upon returning tthe frame rm is formed a notch 53 engaged f still farther forwardly by the finger-piece 52, so that the detent 54 engages the middle notch 56a, the universal bar 19 is moved entirely away fromthe key lever projections, while the universal bar 37 is not yet brought into position to be operated by the key levers, whereby both universal bars are silenced, and neither ribbon either vibrates or winds at the type strokes. Upon swinging the universalbar frame 48 still farther forward, so that the detent 54 engages the next notch 57 in the arm 51, the rear universal bar 37 is brought into position to be engaged by a rear ste 58 formed upon each key lever, whereby t e universal bar is-given a short stroke at the last portion of each key lever stroke, and the rear ribbon 11'is vibrated up to a position to enable its top portion or color band to cover the printing point; while the universal bar 19 is shifted still farther away from the key lever steps.l Upon shiftin the frame still farther forward until the note 58a is engaged by the detent 54, the universal bar 37 is brought up to be engaged by the step 24 on each key lever, whereby said universal Ibar is given a maximum stroke, and'the ribbon 11 is vibrated u y so that its lower edge or color band covers t e printing point, while the universal bar 19 is shifted still farther away from the key levers. v

It will be understood that when the detent 54 is in either of the last two notches- 57, 58, the pawls 42 are actuated at the keystrokes to turn the ratchets 4.4 to wind the ribbon 11. Any suitable springs 59 may be provided however, for engaging the pawls with the winding ratchets, and they maybe mounted upon a transverse horizontal bar 60 having stops 61 to oppose the springs 59 when the pawls are drawn back out of engagement with the ratchets. Said stops 61 also serve to unship the pawls at either the rio'ht hand or left hand side ofthe machine at ig. 2, so as to -cause the ribbons to wind back and forth upon the spools; the bar 60 having a finger- IOO IOS

piece 62 for convenience in shifting, and any suitable detentas seen diagrammatically at 63 to engage notches 64 formed upon said bar. Eachuniversal bar when in operation always actuates both. its pawls, but either one or the other of its pawls is always .out of action according to the adjustment'y of the bar 60. A

Many variations may be resorted to within the scope of the invention, which is not limited so far as the selection of different colors or variable adjustment of the different ribbons is concerned to the employment of a bipartite univers bar, nor to the described winding mechanism; and portions of my imrovements may be used without others, as

or instance the frame 48 may be employed with only a single universal bar and a single set Ofsteps on the key levers instead of a double set.

LII

The two universal bars may be variously formed and located ando erated within the sco e of the invention, W ich is not limited to t e use of one or both vibrators or universal bars operated directly by the key levers. The usual carriage feeding mechanism may comprise a@ third universal bar 65 connected by links 66 topan arm 67 of a rocker 68 having dogs 69, 70, to co-operate with an escapement rack 71 forming part of a carriage upon which the platen 3 is mounted.

Having thus described my invention, I claim:

1. -In a typewriting machine having types and keys, the combination with a plurality of ribbon vibrators, of a plurality of universal bars operated by thekeys and connected respectively to said vibrators.

2. In a typewriting machine having types and keys, the combination with a plurality of ribbon' vibrators, ot a plurality of universal bars operated by the keys and connected respectively to said vibrators, and means `lor silencing one of said universal bars while another is in operation.

3. In a typewriting machine having types and keys, the combination with two ribbon. vibrators, of two universal bars, one for each of said vibrators, and means for silencing either universal bar and concomitantly rendering the other eiifective.

4. In a typewriting machine having types and keys, the combination with two ribbon vibrators, of two universal bars, one for each of said vibrators, and means for silencing either universal bar and concomitantly rendering the other effective.

5. In a typewriting machine having types and keys, the combination with two ribbon vibrators, of two universal bars, one for each of said vibrators, and means for silencing one universal bar and concomitantly rendering the other effective and for enablingthe eiiective universal bar to impart different throws to its vibrator, to cause dierent widthwise portions of the ribbon to cover the printing point at the type strokes.

6. In a typewriting machine having types and keys, the combination with two ribbon vibrators, of two universal bars, one for each of said vibrators, and means for silencing either universal bar and concomitantly rendering the other effective and for enabling the effective universal bar to impart different throws of its vibrator, to cause different widthwise portions of the ribbon to cover the printing point at the type strokes.

7. In a typewriting machine having types and keys, the combination with two ribbon vibrators, of means for enabling keys to operate either vibrator and for enabling the throw of one of said vibratorsto be varied, to bring different portions of the ribbon over the printing point at the type strokes.

8. In a typewriting machine having types and keys, the combination with two ribbon vibrators, of means for enabling keys to opy crate either vibrator and for enabling the throw of either of said vibrators to be varied, to bring different portions of the ribbon over the printing point at the type strokes.

` 9. In a typewriting machine having types and keys, the combination with two pairs of ribbon spools and two ribbon vibrators, of two universal bars operated by the keys, one for each of said vibrators, spool-winding means controlled by the keys, and means for silencing either of said universal bars and concomitantly rendering the other effective and silencing the winding means associated with the silenced vibrator.

10. In a typewriting machine having types and keys, the combination with two pairs of ribbon spools and two ribbon vibrators, of two universal bars operated by the keys, one for each of said vibrators, twosets of spoolwinding means respectively actuated by said universal bars, and means for silencing either of said universal bars and concomitantly rendering the other eilective.

1 1. In a typewriting machine having types and keys, the combination with two pairs of ribbon spools and two ribbon vibrators, of two universal bars operated by the keys, one for each of said vibrators, two sets of spoolwinding means respectively actuated by said universal bars, means for silencing either of said universal bars and concomitantly rendering the other effective, and a shifting device associated with said winding means, to cause either spool in either air to wind.

12. In a typewriting macliine having types and keys, the combination with two pairs of ribbon spools and two ribbon vibrators, of two universal bars operated by the keys, one for each of said vibrators, two sets oi spoolwinding means respectively actuated b said universal bars, means for silencing eit. er of said universalbars and concomitantly rendering the other effective, and a shifting device associated with said winding means, to cause either spool in either pair to wind, said shifting device controlled by a single ringer-piece.

13. In a typewriting machine having types and keys, the combination with two ribbon vibrators, of two universal bars, one for each'. of said vibrators, a single finger-piece, and means controlled by said iinger-piece for concomitantly silencing either universal bar and rendering the other effective.

14. In a typewriting machine having types and keys, the combination with two ribbon vibrators, of two universal bars,.one for each of said vibrators, a vsingle fingerpiece connected to means for concomitantly silencing one universal bar and rendering the other efective and for enabling the eective universal bar to impart diiierent throws of its vibrator, to cause different widthwise portions of the ribbon to cover the printing p'oint at the type strokes, and means for sebrators connected to said universal bars,

said keys operating stepped-members which actuate said universal bars, and the latter being each shiftable to position for, engaging with different ste pcd-members to vary .the throw of its assoclated ribbon vibrator.

17. In atypewrit'ing machine having a series of type bars, a series of key-operated levers connected to the type bars, the combination of a swinging frame, two universal bars hung upon said frame and movable,

thereby into and out of position to -be engaged by stepped-projections uponl saidl levers, a finger-piece for swinging said frame, means for detaining said frame in different positions, and ribbon vibrators respectively connected to said universal bars.

18. In a typewriting machine having tylpes and keys, the combination with-a plura ity of ribbon vibrators, of means for enabling the keys to throw either of said vibrators different distances to bring different widthwise portions of the ribbon over the printingvpomt at the type strokes.

19. Ina t pewriting machine havingt es and keys, the combination with a lura ity of ribbon vibrators, of a plurality o universal bars operable by the keys and respectively connected to said vibrators, and

means for either silencing one of said vibra-' tors and concomitantly rendering the other effective, or silencing both of said vibrators, at will. l

20. In a typewriting machine having tylpes and keys, the combination `with a lura ity o f ribbon vibrators, of a plurality o universal 4bars operated by the keys and respectively connected to said vibrators, and means for either silencing both of said universal bars or for silencing one of said universal bars and for concomitantly renderingl the other effectivel 21. In a typewriting machine having types and keys', the combination with two ribbon vibrators, of two universal bars, one for each of said vibrators, and a single device common to said universal bars and comprising means for either silencing either universal bar and concomitantl rendering the other effective, or silencing lioth universal bars concomitantly.

l '22. In a typewriting machine having types and keys, t e combination with two ribbon vibrators, of two universal bars, one for each of said vibrators, an adjustable linger piece having means for concomitantly silencing either universal bar and rendering the other effective, and also for silencing both universal bars concomitantly, and means for detaining said finger piece in different positions to which it is adjusted.

23. In a typewriting machine having types and keys, the combination with two ribbon vibrators, of two universal bars, one for each of said vibrators, and means adjustable to .different ositions for either concomitantly silencing oth universal bars or for silencing one universal bar and concomitantl rendering the other eflectiveand for,v enaliling the effective universal kbar to impart different throws to its vibrator, to rcause different widthwise portions of the ribbon to cover the printing point at the type strokes.

24. In a typewriting machine having types and.keys, the combination with two ribbon vibrators, of means for enabling keys to o erate either vibrator and for enabling t e throw of one of said vibrators to be varied, to bring different portions ofthe ribbon over the printing point at the type strokes, and for sllencing both vibrators at will.

25. Ina typewriting machine having types and keys, the combination with two ribbon vibrators, of means for enabling keys to o erate either vibrator and for enabling t e throw of either of said vibrators to be varied, to bring different portions ofthe ribbon over the printing point at the type strokes, and for sllencing bothvibrators at will.

26.. In a typewriting -machine having types and keys, the combination with two pairs of ribbon spools and two ribbon vibrators, of two universal bars operated by the keys, one for leach of said vibrators, spool-winding means controlled by the keys, and means for concomitantly silencing either of said universal barsand rendering the other eHective, and

Y vfor silencing the winding means associated with the silenced vibrator, and for concomitantly silencing both the winding means and the vibrators.

27. In a type writing machine having types and keys, the combination with two pairs of ribbon spools and two ribbon vibrators, of two universal bars operated by the keys, one for each of said vibrators, spool-windinfr means directly actuated by said universal bars, and means for concomitantly silencing either of said universal bars and rendering the other effective, and for concomitantly silencing both universal bars, at will.

28. In atypewriting machine having types and keys, the combination with two ribbon vibrators, of two universal bars, one for each of said vibrators, a single adjustable fingerpiece, means controlled by said finger-piece IOO IIO

for eitherv concomitantly silencing either universal bar and rendering the other effectand keys, the combination of a lshiftable frame, two universal bars mounted upon saidv frame and each shiftable thereby into and out' of ppsition for operation, and ribbon vibrators respectively connected to said universal bars; said frame movable to dierent positions for silencing both universal bars and for bringing either into use while the other is silenced.

30. In a typewriting machine having types and keys, the combination of a shiftable frame, two universal bars mounted upon said frame 4and shiftable thereby into and out of position for operation, and ribbon vibrators respectively connected to said uni- `versal bars, said keys operating stepped members which actuate said unlversal bars,

and the latter being each shiftable to posivtion for engaging with different stepped members to vary the throw of its associated ribbon vibrator, and said universal bars be- 'ing also shiftable to positions where both clearsaid stepped members at the same time. s

3l. Ina typewritingl machine having arse-` ries of type bars, a series of key-operated levers connected to the t pe bars, the combination 4of a swinging ame', two universalbars hung upon said frame andl movable thereby into and out of position to be engaged neither or either by stepped-projections upon said levers, a finger-piece for swin ing-said frame, means for detaining said ame in dierent positions, and ribbon vibrators connected to said universal bar.l

32. In a typewriting machine having types 'and keys, the combination with a plurality of ribbon vibrators, of means for` enabling the keys to throw either of said vibrators different distances to bring differentgwidthwise portiolns of the ribbon over the printing oint at the type strokes, and for silencing iioth vibrators.

33. In a typewriting machine having types and key, means for enabling the keys to vibrate anyone of four bands of ribbon over the printing point at the type strokes, or for silencing the ribbon-vibrating mechanism.

ewriting machine, the combiuniversal lb ar, means for shifting said universal bar to positions-,to engage different sets of steps to be vibrated dierent distances at the type strokes, and a vibrator connected to the said universal bar.

35. In a typewriting machine comprising a type-operatlng mechanism, the combination with means for enabling the type-operating mechanism to vibrate a plurality of ribbons to cover the printing point, of means for enabling the operator to silence one ribbon and cause the type-operating mechanism to vibrate the other ribbon to bring different widthwise portions thereof over the printing point.

36. In a typewriting machine comprising a type-operating mechanism,.the combination with means for enabling the type-operating mechanism to vibrate a plurality of ribbons to cover the printing point, of means for enabling the operator to silence either ribbon and cause the type-operating mechanism to vibrate the other ribbon to bring diiiierent widthwise portions thereof over the printing point. i

37. In a typewriting machine having a platen and a type-operating mechanism, the combination of two pairs of ribbon spools, means betweenthe spools for guiding the ribbons in superposed relation, means for windin either spool of either pair, and means Ior enabling the type-operating mechanism to cause the ribbon on either pair of spools to vibrate variably at the type strokes, to cause different widthwise portions of the ribbon to cover the printing point.

38. In a typewriting machine having a type-operating mechanism, the combinatlon of two pairs of spools, of means for winding either spool of either pair, while the spools in the other pair remain stationary, and means for enabling the type-operating mechanism to cause the ribbon upon either pair of spools to vibrate during the type strokes, to cover and uncover the printing point; said vibrating means including a art adjustable to enable one ribbon to be vi rated variably by the type-operating mechanism, to cause different widthwise portions of the ribbon to cover the printing point. i s

39. In a typewriting machine provided with types and a platen, the combination of two palrs of spools, means for winding the ribbon back and forth upon either pair 'of spools, while thespools in the other pair remain stationary, and means for causing the ribbon upon the active spools to vibrate different distances at the type strokes, at the will ofthe operator, to cause different widthwise portions of the ribbon to cover the printin point. l

40. n a typewriting machine, the combination with two pairs of spools, of a spool winding mechanism, a shifting rlevice for IOO connecting either pair of spools to said Windin mechanism, and means connected to said `shifting device for causing to cover the printi spools 1n the ot connecting either pair of spools to said winding mechanism, and means operable simultaneously with said shifting device, for causing to cover an`d uncover the printing point at the type strokes different widthwise portions of that ribbon which carried by the spools which are connected to the winding mechanism.

'co-operation between said winders and either pair of spools, adjustable means ior variably actuating the vibrator which is associated with the spools with which the winders co-operate, and means for reversing 'the direction of rotation of said winders.

43. In a typewriting machine, the combi- .nation with two pairs of ribbon spools,`of ac tuating means for winding said spools, means movable independently of said spools :for operatively connecting said pairs oi' spools alternately to the actuating means, and means for causing either ribbon to vibrate variably at the type strokes to cause differont widthwise portions thereof to cover the printing point.

44. In a front strike writing machine, the combinationl with two pairs of ribbon spools placed edge to edge, of means for winding either spool ci' either pair, and means for causing the ribbon upon either pair of spools to move diderent distances to cause different widthwise portions thereof to cover the printin point.

45.- In a front strike writing machine, the combination with a pieten, of two pairs of ribbon spools mounted in front of the pieten, one pair between the spoois of the other pair, means for Winding either spool 'of either pair, and means ior causing different Widthwise portions of the ribbon upon either pair of spools to cover and luncover the printing point.

46. in a typewriting machine, the combination with two pairs of spools, of means for winding either spool of either pair while the spools 1n the other pair remain stationary, and means for causing diderent widthwise portions of the ribbon ,upon one pair of 'spools to vcover the printing point, and for rendering said ribbon inedective and causing the other ribbon to cover the printingpoint.

47. In a typewriting machine, the combination with two pairs of spools, of means for winding either spool of either pair while the er pair remain stationary,

and means for causing diiierent widthwise seni/as portions of the ribbon upon either pair of spools to cover the printing point during the type strokes, at will. i

48. In a typewriting machine, thefcombination with a platen and types mounted to strike upon the front side thereof, of two pairs of spools mounted edge to edge in front` of the platen, one pair between the spools of the other pair, means for causin the ribbon upon either pair to vibrate varia ly to cause diierent widthwise portions thereof to cover and uncover the printing point during the type strokes, and means for winding the ribbon back and forth upon eitner pair of spools while the spools in the other pair remainstationary. l

49. In a typewriting machine, the combination with two pairs of spools, of a spoolwinding mechanism, means for causing either pair of spools to be operated by said winding mechanism while the other pai-r remains stationary; and means for causing the ribbon upon either pair of spools to move different distances to cause different widthwise porfl tions thereof to cover the printing point.

450. in a typewriting machine, the combin ationfwith two pairs of spools, of a spoolwinding mechanism, a shifting device for connecting either pair of spools to said windingmechanism, and means connected to said shifting device for causing to cover the printing point diderent wid-thwise portions of that ribbon which is carried by the spools which are connected to the Winding mechanism.

51. In a typewriting machine, the combination with two pairs of spools, of a spool winding mechanism, a shifting device for connecting either pair of spools to said windv ing mechanism, and means operable simultaneously with said shifting device, for causing to cover the printing point at the type strokes different widthwise portions of that ribbon which is carried by the spools which are connected to the winding mechanism.

52. In a typewriting machine, the combination with two ribbon vibrators and two pairs of ribbon spools for carrying the rib bons threaded through said vibrators, of a finger-piece, and means operable by the iatter for both rendering either vibrator ei'iective and the other -vibrator ineiective and for causing different widthwise portions of the active ribbon to covei the printing point,

at the will of the operator, and also for caus` ing the winding of the ribbon which is 'threaded through the effective vibrator.

53. In a typewriting machine, the combination with means for supporting twov rib?V ITO Iig

ribbons to cover the printing point, of means Y' both ribbonsl simultaneously, or to silence one ribbon and cause the ,type-operating mechanism to vibrate the other ribbon to nation with means for supporting two ribbons of reversible winding means, a lingerpiece, means controlledby said finger-piece fr causing either ribbon to be wound by said winding means while the other ribbon i remains stationary, two vibrators for causing the ribbon to cover and uncover the printing point at the type strokes, and means also controlled by said linger-piece for calling into action the vibrator which `carries the` winding ribbonv and rendering the other vibrator ineective, and for causing diiferent widthwise portions of the active ribbon to cover the printing point, at the will of the operator.

55. In a typewriting machine comprising a'type-operating mechanism, the combination with means for enabling-the type-operating mechanism to vibrate a plurality of for enabling the operator either to silence bring different widthwise portions thereof over the printing point.

56. In a typewriting machine comprising a type-operating mechanism, the combination with means for enabling the type-'operating mechanism to vibrate a plurality of ribbons to cover the printing point, of means for enabling the operator either to silence both ribbons simultaneously or to silence either ribbon andI causevthe type-operating mechanism to vibrate the other ribbon to bring different widthwise portions thereof over the printing point.

57 .A In a typewriting machine provided with types and a platen, the combination of two palrs of spools, means for winding the ribbon back and fort-h upon either pair of spools while the spools in the other pair rel main stationary, and means for causing the ribbon upon the active spools to vibrate diHerent distances at the type strokes, at the will of the operator,-to cause different widthwise portions of the ribbon to cover the printing point; means being provided for silencing simultaneously the winding means and vibrating means of bothribbons.

58. In a typewriting machine, the combination with two pairs of spools, of a spool l Winding mechanism, a shifting device for l disconnecting both pairs simultaneously or connecting either pair of spools to said winding mechanism, and means connected tosaid shifting device for causing to cover the printing point different widthwise portions .of

that ribbon which carried bythe spools which are connected to the winding mechanism, orl for silencing the widthwise movements of both ribbons simultaneously with the disconnection of the winding mechanism from both pairs of spools.

59. In a typewriting machine, the combination with two pairs of ribbon spools, of shiftable means for either silencing both ribbons simultaneously or causing the ribbon on either pair to vibrate to cover and uncover the printing point at the type strokes at will, said shiftable means being also shiftable to cause different widthwise portions of the active ribbon to cover the printing point at the type strokes.

60. Ina typewriting machine, the combination with two pairs of spools, of means for winding either spool of either pair while the spools in the other pair remain stationary, and means for causing different widthwise portions of the ribbon upon one pair of spools to cover the printing point, and for rendering saidribbon ineffective and causing the other ribbon to cover the printing point,

-and for silencing all theribbon-Winding and moving means.

61. In a typewriting machine, the combination with means for supporting two ribbons of reversible winding means, a iingerpiece, shiftable means controlled by said.

finger-piece for causing either ribbon to be wound by saidwinding means while the l other ribbon remains stationary, and two vibrators for causing the ribbon to cover and uncover -the printing point at the types strokes, said shiftable means being provided with means to call into action the vibrator l which carries the winding ribbon and renderingv the other vibrator ineffective, and to cause either -vibrator to move variably at the type strokes, and to silence all the ribbon winding and vibrating mechanisms.

BURNHAM C. STICKNEY. Witnesses K. FRANKFORT, M.l L. MICKENs.

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