US842814A - Ribbon-vibrating movement for type-writers. - Google Patents

Description

No. 842,814. PATENTED JAN. 29, 1907.

r G. SG-HERER & J. LINDBURG.

RIBBON VIBRATING MOVEMENT FOR TYPE WRITERS.

APPLICATION FILED AUG'. 11, 1906.

machine, in which we have modifie UNITED STATES PATENT oEEIoE.

ILBERT SCHERER AND JOSEPH LINDBURG, OF DENVER, COLORADO, ASSIGNORS TO THE UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK.

; RIBBON-VIBRATIN G MOVEMENT FOR TYPE-WRITERS.

Specification of Letters Patent.

Application filed August 11, 1906. Serial No- 630,124.

and J OSEPH LINDBURG, citizens of the United States of America, residing at-Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvemerits in Ribbon-Vibrating Movements for Type-Writers, of which the following is a specification.

This invention relates to ribbon-vibrating mechanisms of typ e-writing machines and its object is to provide simple and .improved means for causing different widthwise portions of a ribbon to'cover the printingoint,

especially when the ribbon is provide with two color-bands and it is'desired to write either one color or the other at will. I

Another object is to provide simple means for silencing the ribbon-vibrating mechanism so that the typesmay strike off the ribbon when it is desired to make stencils.

We illustrate our invention as applied to an Underwood front-strike ty e-writin d the ususfi ribbon-vibrating lever and provided it with two wrists, either of which may engage an actuating-arm provided upon the usual universal-bar frame. These wrists are at differand either may be brought into use While the other one is silenced, thereby altermg the throw of the lever and ribbon, the wrists being connected by a yoke and bein movable in axial direction independently 0 both the lever and the actuator. Afingerpiece is provided at the front of the machine and-con nected to said yoke to control the shifting of the wrists or pins, and the latter are so constructed that when the finger-piece is in a inidwayposition neitherwrist engages the ac-.

tuator, so thatthe ribbon fails to vibrate at the type-strokes, thus enabling the types to strike off the ribbon. In said. machine the and lower-case etters, and the ribbon-vibrating lever shifts therewith, and our im rove-.

ments includemeans for accommo atiugsuch shifting-movementof the lever.

In the accompanying drawings, Figure 1 is a rear perspective elevation,.partly in section,

- of the ribbon-vibrating mechanism of an Underwood'type-writing machine provided with band of the ribbon into use.

tional frontelevation of'a forked ribbon-vi- Patented. Jan. 29, 1907.

Fig. 2 is a secbrating lever and an actuator with the upper wrist connecting'the lever to the actuator and the lower wrist silenced, this being the position of the parts seen'at Fig. 1. Fig; 3 is a view similar to F silenced and the lower .wrist brought into action, whereby the extent of vibration of the lever is increased and the lower color-band on the ribbon is brought into use. Fig. 4 is-a view similar to Figs. 2 and 3 showingbo-th wrists silenced, so that the ribbon remains ig. 2, but showing the upperwrist motionless'below the printing-point during theo eration of the types. Fig. 5 is a'sectiona side elevation showing the parts in normal o'sitions. Fig. 6' is a view similar, to Fig. 5, t e types printing through theupper color-band of the. ribbon. Fig. 7 is a view similar to Fig. 6, but showing the types printing through the lower color-band of the ribbon. .Fig. 8 is a view similar to Fig.7, but showing the types striking off the ribbon; Fig. 9 is a plan of a forked ribbon vibratory lever. Fig. 10 is a plan of a yoke carrying a plurality of wrists. 1

Ty e-bars 1 mounted upon a fulerum rod- 2 an carrying lower-case and upper-case types 3 4, strikeithrough a'ribbon 5 against t e front side of a platen 6. The type-bar hubs are guided in slots .7, formed in 'a segment 8, and upon the latter is secured a typebar9. Heels 10 on the .ty e-bars press rearwardly a curved universai bar 11, which is fixed upon a frame or table 12. U on the -ciprocates backwardly and; forwardly with the frame 12 at the type-strokes and causes the ribbon 5 to vibrate up and down to cover and uncover the printing-pointl 1 Said ribbon-islmounted on an upright carrier 14.- and attached to a lever 15, the latter being vibrated by saidcaotuator 13. Said lever-1s .fulcrumed at 1.6 upoma bracket 17, which extends back from aplaten shift-rail 18, upon which runs aro'll 19 of the platen-frame. I The rail and platefi-dshift up and down in the usual way} to egfialfiheither set of types 3 or 4 to print. .3 The lever stride the ac iiator 13. Upper or lower pins or wrists 2,1 and 22 pass through bosses. or

our imlprovements and showingtthe parts in heads 23 24, formedone above the other norma position, the ribbon-s'hi ing mechanism being adjusted to bring the upper colorupon said forks. 'lhesbpins or wristszl 22,.

which-are mounted at difierentfiiiistances" formed with forks 20 to be-- 90 latteris ,."erected an actuator 13, w 'ch reconnected by a yoke 25, so as to slide endwhichever pin 21' or 22 is in enga ement with wise or axially together in bearings 26 27 in said heads or bosses.

may be slidden in and out to engage either pin with an upwardly-extending slot 28 forked in the arm 13. As will be seen by comparison of Figs. 2 and 3. the movement of one pin into engagement with one slot is ac companied by the movement of the other pin out of such engagement, whereby it is silenced. I

The shifting of the yoke and pins may be effected by a finger-piece or handle 29, mounted at the .front'of the machine upon a rearwardly-extending rock-shaft 30, the lat. ter having its rear end in an upwardly-ex tending slotted arm 31 to engage a grooved collar 32, fixed upon the end of a transverse rock-shaft 33. The latter extends from the side to the middle portion of. the type-writing machine, being suitably journaled, as upon brackets 34 35, and at its inner end isprovided with an arm 36, which extends rearwardly in a direction about parallel with the direction of movement of the actuator 13, and passes loosely through an eye 37 provided in the yoke '25. By means of the handle 29, acting through the arm 31, the rockshaft and its arm 36 may be drawn transversely or in the direction of the axes of the pins 21 22, thereby shifting said pins to bring either one into action and. simultaneously silence the other. The arm 36 is stationary during the reciprocations of thelactuator 13,

the yoke slipping idly back and forth along said arm.

A yielding finger 38 is adapted to engage notches formed upon the collar 39, fixed upon the rock-shaft 33 to yieldingly detain the latter where it may be shifted, and stops 40 and 41 may be provided to limit the swinging movements of the handle 29. The latter may be swung to a midway position, so that the yielding detent 38 may occupy a notch-42 midway of the other notches on the collar 39, and at this time the pins or wrists 21 22 will occupy a midway position, as seen at Fig. 4, at

. which time both are out of engagement with.

the actuator 13, so that the'reciprocations of the latter have no effect upon the ribbon, and hence the types may strike off from the ribbon, as at Fig. 8.

When the platen 6 and the platen shiftrail LS are shifted up to enable the types 4 to print, tlie'bracket 17 and the lever 15 rise,

therewith, together with the yoke 25,. and

the slot .28 rides up in said sli e, which is made of sufiicientheight for the purpose.

The arm 36 turns about the axis 33 to accommodate npward movement of the yoke 25,

and owing to -nits loose connection with the The bearings are of sufficient length to retain both pins at all 1 times so that the yoke cannot become accidentally unshipped. The yoke and pins;

l eye 37 permits free movement of the yoke at the platen-shifting operation and during the writing of capital letters.

Having thus described our invention, we claim lever, wrists connected to said lever at difl ferent distances from the fulcrum thereof, an i actuator for said lever, and means for shifting 5 said wrists independently of the lever to engage eitherwrist with said actuator, and concomitantly disengage the other wrist from said actuator. j

'2. The combination of a ribbon-vibrating lever, an actuator, wrists mounted at difl'erent distances from the lever-fulcrum, and means for shifting said wrist axially inde pendently of both said lever and said actuator for bringing either wrist into action, and concomitantly silencing the other wrist.

The combination of a reciprocating actuator, a ribbon-vibrating lever having forks best-riding said actuator, wrists mounted at different distances from the fulcrum of the ally independently of both said actuator and said leverfor bringing either wrist into action, and'conconiitantly silencing'the other wrist.

4. The combination of a reciprocating ac tuator having'a slot, a ribbon-vibrating lever having forks bestriding said actuator, wrists mounted upon said lever at different dis- .tances from its fulcrum, and means for shiftone to enter said slot, and the other one to withdraw from said slot.

5. The combination of a ribbon-vibrating lever, wrists connected to said lever at different distances from the fulcrum thereof, a yoke connecting said wrists, and a reciprocating actuator for said lever; said yoke being shiftable to ,move said wrists axially into and out of engagement with said actuator.

6. The combination of a ribbon-vibrating lever, wrists connected to said lever at different distances from the fulcrum thereof, a yoke connecting said wrists, a reciprocating actuator for said lever said yoke being shiftable tomove said wrists axially into and out of engagement with said actuator; a part extending in the direction of reciprocation of said actuator, and loosely connected to said yoke, and means including afinger-piece for shifting the said part to move said wrists in axial direction. 1 7. The combination of a ribbon-vibrating lever, a reciprocating actuator, Wrists mount 1. The combination of a ribbon-vibrating lever, and means for shifting the wrist axiing said wrists simultaneously to cause either ed at different distances from the lever-fulcrum and connected by a yoke, and shiftable independently of said lever and actuator, a partlooselyengaging said yoke and extend ing in the direction of movement of said ac tuator, anda finger-piece connected to the said part to move said yoke and wrist in axial direction.

8. In atype-writing machine, the combination with a platen-shifting mechanism, of

a ribbon-vibrating lever shiftable with said mechanism, a reel rocating actuator, wrists yoked'together an mounted at difierentdistancesfrom the fulcrum of said lever and shiftable axially in bearingsprovided upon said lever, a rockshaft having an'arm ex tending in the 'directionof reciprocation of said actuator and loosely connected to said oke, to shift the latter, and also to move 1dly therewith during the platen shifting operation, and a finger-piece having means to shift said rock-shaft endwise.

9. The combination of a ribbon-vibrating lever, wrists connected to said leverlat differ-'- ent distances from the fulcrum thereof, 'areciprocating actuator between said wrists, and means for shifting said wrists axially independently of both the lever and the actuator, and means for detaining said wrist either in such a position that one engages the actuator, oi in such a position that theother engages the actuator, or in such a position that neither engages the actuator.

10. The combination of a reci rocating actuatdr, a ribbon-vibrating ever, wrists mounted at different distances from the ful crum of the lever, and means including a fin geriecei for shifting the wrists axially indepen ently of both-sa1d actuator and said lever, so as to bring eitherone wrist or the other, or. neither of them into action at will.

11. The combination of a reci rocating aetuator having a slot, a' rlbbon-vi rating lever having forks bestridl'ng said actuator, wrists .mounted upon'said lever at different distances from its fulcrum, means for shifting sa1d wrlsts simultaneous to cause-either oneto enter sa1d slot, am the other one to withdraw from said slot, and means for detaining said wrists in a midway osition in i which neither of them engages sai slot.

\ 12. In a'type-writing machine, the combination with a shifting-platen mechanism, of

a ribbon-vibrating lever shiftable with, said" platen, an actuating-arm having a slot ex-- tendinginL-the direction .of the shifting of the platen, wrists mounted at different polnts along the'lever, and means for shifting said wrists at either shift position of the platenshifting mechanism, so as to bring either wrist into actlon, and simultaneously sllence the other wrist. -13. In a type-writmg machine, the combination with a shifting-platen mechanism; of

azribbon-vibrating lever shiftable with said platen, an actuating-arm having a slot extending in the direction of the shifting of the platen, wrists mounted at different points along the lever, and means for shifting said. wrists at either shift'position ofthe platenlatwill. 1

shiftingmechanism, so as to bring either wrist into action, and simultaneously silence the other wrist, or so as to silence both wrists 14. In combination, a mechanism, a finger-piece mountedupon the framework,-a rock-shaft connected to said finger-piece to be moved I .endwise thereby, an arm extendingfromsaid rock -shaft, an actuator reciprocatingin the direction. of said arm, a rlbbon-vibrating lever shiftableup' and down with theplate'n, and means loosely connected to said arm .for'causin'g said actuator to vibrate said lever to different distances atwillJ ,15. In a type-writing machine having type-operating ke s anda' universal barreclprocated'by sai keys,.the combination of an actuator connected to said universal bar and having a slot, 'a If1bb'011 VlbISL1I/1D lever, a

plateniding said wrists for I' clprocated by sai keys, the combination of .an actuator connected to said universal bar, a ribbon-vlbratmg lever, axpalr of wristsfat different distances from the fulcrum of said lever, and means for moving said wristsst multaneously to silence either thereof, and cause the other to connect said lever to said actuator. t

7. In a ty e-writirig machine having type operating eys and a universal bar reciprocated by said keys, the combination wlth a ribbon vibrator or carrier, of shif table means'for'enabling' said universal bar to vibrate said carrier different distances at the t e-strokes, said vibrating means including a ever between the universal bar and the carrier, a pair of'wrists mount-ed at different distances from the fulcrum of saidlever,

movementetransmitting means cooperating with sa1d lever and sa1d wristsyand means for shifting said wrists axially at the same time, to bring elther nto use and silence the other:

In testimonvwhereof we have affixed our signatures 1n presence of twowitnesses.

GILBERT SGHERER. I

JOSEPH LINDBURG.

'Witnesses:

HENRY P. SPENCER? -A. W. EATON.

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