US876309A - Ribbon mechanism for type-writers. - Google Patents

Description

P. X. WAGNER. RIBBON MECHANISM FOR TYPE WRITERS.

APPLICATION FILED MAY 18. 1905.

PATENTED JAN. '7, 1908.

4 SHEETS-SHEET 1.

awuenk c No. 876,309. PATENTED JAN. 7, 1908,. P; X. WAGNER.

RIBBON MECHANISM FOR TYPE WRITERS. APPLICATION FILED MAY 18. 1905.

4 SHEETS-SHEET 2.

' No- 876,309( PATENTED JAN. '7, 1908.

F. X. WAGNER.

RIBBON MECHANISM FOR TYPE WRITERS. APPLICATION-FILED MAY 18. 1905.

4 sums-8311M a.

PATENTED, JAN. '2. 1908.

V F. X. WAGNER. RIBBON MECHANISM FOR TYPE WRITERS;

,APPLICIATION FILED MAY 18, 1906.

4 SHEETS-SHEET '4.

-72 2. 14 fi anon 91.30

25 Fig. 3 v is a. sectional 50-pivot 11.

UNITED STATES PATENT OFFICE.

FRANZ X. -WAGNER, OF NEW YORK, N. 'Y.,

ASSIGNOR -TO UNDERWOOD- TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEWJERSEY.

RIBBON MECHANISM FOR TYPE-WRITERS.

Specification of Letters Patent.

Patented .1 an. 7, 1908.

Original application filed November. '12. 1904:. Serial No. 282.413. Divided and this application filed May 18. 1905. Serial No. 260.984.

To all whom it may concern; I

Be it known that I, FRANZ'X. WAGNER, .a citizen of 'the United States, resident of the borough of the Bronx, city, 'county, .and State of New York, have invented certain new and useful Improvements in Ribbon Mechanism for following is a spec' cation.

My invention relates to typewriters and e-Writers, ofwhich the has for its object to improve the ribbon meehanisniof such machmes. The inven-. tion will be fullydescribed hereinafter and the features of novelty will be pointed out in the appended claims. The

to be had to the, accompany-'- ingi drawings in which. V

. igure 1 1s a sectional elevation of a typewriting machine embodying my im rovements; Fig. is anelevation of s'uc ma-. .chine from the left side with arts insection;

Ian 0 the ribbon reverse mechanism on t e line 3*3 of Fig. 1;

v 4 is a rear elevation taken as indicated by the arrows 4 in Fig. 3 Fig-Sis a section .on line 5-5 of'Fig. 4;-Fig. 6 is a section on line 66 of Fig. 4; Fig. 71s a s'ection on-line I 7 -7 of Fig. 3 and Fig. 8 is a detail rear view of certain arts of the ribbon mechanism.

In the rawin s,the keys 1, are mounted on levers2, whi'c are fulcrumed at 3, preferablyirfsuch a manner as to. be easily removable; .Each'key lever by means of a in arid-slot connection 4 o 'e'rates an elbow ever 5, fulcrumed at 6. he elbowlevers are preferably/removable from their fulcrum, bein normally held'by a locking bar' pivot "11, carriedby the segment 12, and

preferabl the type bar is held-Lin place by means 0 .a latch '13,'j' jwhich the spring 14 tends to throwinto a osition in which it closes the 0 em'ngfor t e insertion of the he handle of the latch is indicated at 13*. Each key lever is provided with a toe 2 adapted to engage auniversal" bar 15 which extends transversely of the machine, and has at each end a-lug ivotally 66 connected at 15 with'a-suspende link 16:

fulcrumed on the machine at 16. A bar 17 extends .rearwardly. from the center of the universal bar 15 and is seouredat its rear endto a cross bar 18 fulcrumed on the.

frame at 18. The bar 17 carries an escapemen't pawl 19, which normally arrests a tooth of the escapement wheel 20 mounted on the shaft 21. The bar 17 is further provided with a projection'22 in engagement with the stop pawl 23, fulcrul'ned on the frame of the machine at 24,- and: pulled against the sspring 25. s the universal bar 15 is moved rearward the awl 19 is disengaged from the escapement w eel 20 and the stop pawl 23 is swung, into the path of said wheel 20, this projection 22 by an adjustable operation permitting the esca ement wheel irecti 20 to rotate in the on o the arrow in Fig. 3'. The operation is reversed as the umversalbar again moves forwarda'to the position shown in Fig. 1, partly under the influence of the spring 25 but chiefly under the influence of the carriage ropelling spring.

At its upper end the s aft 21 is provi ed with a loose pinion 26 engaging a rack 27 on the carriage 28. Thispinionis connected to turn with the shaft in the feed direction, by means of a disk 21 rigid on the shaft 21 and v s ring 'ressed pawl 21 carried by said disk. his al owe the carriage to be moved by hand in a direction contrary to the feed movement without turning the shaft 21.

direction asithe shaft-during the feed. movement, by a'spring-pressed pawl 29 secured to a disk 29 rigid with thesh'aft 21.

and 2l except that the pawls 21 and 29 face in opposite'directions and thus act op-- positely. The pinion 29 meshes with 3 a toothed. wheel 30, rigidly connected with a bevel wheel 31 engaging another bevel wheel 3-2 upon a sleeve 33 surrounding a shaft 34 extending transversely of the machine. All arm 35 (Figs. 3 and 4) )rojected from the frame ofthe machine hoids the-bevel wheel '32 against longitudinal movement, and in These parts correspond-to those designated by 21 pinion 29 is loosely mounted on the shaft 21, and is normally drivenin the same Near its 38 on shafts 39. It will be understood from Figs. 3 and 4 that only one of the sets of v receives a rearward and u ward movement,'

wheels 37, 38 is in mesh at a time. Each shaft 39 is in drivingconnection'by means of bevel gearing 40, 41, with the shaft 42 of one of the ribbon spools 43, contained in the holders 44. These spools and holders may be of the usual construction. the ribbon 45 on,

its way from one spool to the other assing through a ribboniguide 46 disposed a jacent to the printing point. 'Thisribbon guide at each operation of a key ever, by means-of a lever 47 (Fig. 1), having a in and slot connection' with the bar 17 and lcrumed at 48.

g The upper end of this lever has a pin and slot connection with an elbow lever 49'fulcrumed I at 50 and carrying the ribbon guide 46 the swinging of this lever is limited by a screw 51, extending through a slot 499.. Thus, each time the escapement is operated to .ad: vance the carriage in its step by step feed movement, the ribbon feed just described will also be actuated, through the medium of the mechanism just described. \This fulcrum 48 ma be raised or lowered to vary the throw 0 the lever 49 and held in such adjusted position by means ofthe set screw 48*. In order to adjust the guide 46 so that it will always reach the normal or printing position, notwithstanding the difierence in the throw of the lever 49 due to the adjustment of the pivot 48, the said guide 46 is pro-' vided with a slot which cooperates with the screw 46. The said guide 46 is thus adjustable up or down on the elbowlever 49. By

having the fulcrum 48 adjustable, different -widths of ribbon may be used; that is, if a wide ribbon 'is used, it is desirable in order to with collars 34 which are adapte use all parts of said ribbon to raise the lower partthereof a greater distance than if a liarrower ribbon is usedl By adjusting the pivot/1'8, this extra throw can be secured.

his adjustment is also valuable where a large number of copies are written at, the

same time, for by l wering the pivot 48, the

distance between t e platen surface and the .initi'al position of the guide 46 can be increased to make wayfor the large number of sheets and thus prevent smudging. In order that the direction of the ribbon feed may be reversed when the ribbon 45 is almost entirely unwound from one of the 4 spools-43, the following mechanism is provided (Figs. '1, '2, 3 and 4) The shaft 34 is provided adjacent'to the bevel pinions 37 to be enengaged by-forked push fingers 52 mounted I toward each other.

on shafts 53 and under the influence of springs 54 which tend to throw said fingers The fingers 52 arenor mally held stationary, ready to be thrown inward by the respective springs 54, by means of latches 55 projected into the paths of arms 56 secured to shafts 53. These latches are frame in either position of the shaft 34.

' metal loop or projection of such a size that it cannot pass through the guides 61. When this loop engages the -said guide, the guide will be swung aside so as to bring the corre-v sponding latch 55 away from-the arm 56. This will release the shaft 53 and cause the spring 54 and push finger 52' to shift the shaft 34 so that its opposite end Will'come intodriving connection with the respective bevel wheel 38, thus reversing the direction of the ribbon movement. The push fingers 52-are brought back to their'original (set) position in any suitable manner, for instance,by the carriage shift mechanism, asfully described hereinafter. Fig. 3 shows the position ofthe parts immediately after the shaft 34has been shifted to the right and before the arm 56 on the. left-hand side has been reset by the operation of the carriage shift. p v In order to prevent any accidental movement of the reversing shaft 34 I may locate, a

spring pressed ball 62 in one of the bearings 36 (Figs. 4' and 5) to engage one or the other of two, grooves 34 in the shaft 34 according to the position .of saidshaft;

As statedhereinbefore the carriage slntt mechanism may be employed for the purpose of setting the ribbon reverse mechamsm.

For this 'urpose thelifting bars 63 are providedwit hooks 64, pivoted at 64 adapted to. engage the ends of the arms 56. Each hook 64 is connected with a spring 64 thev upper end of which slides in the guide 64 v on the frame of the machine. Thus, when the lifting bar 63 is in its lower position, the

spring holds the hook in the projecting posi tion shown in Fig. 2, but as, the lifting-bar rises, the hook will be swung-Eon its pivot in the direction of the arrow 'to' fifially'clear the arm 56 after the latch 55has been set. Thus when the carriage is shifted to its up er position by de ressing either of the shift keys 65, one of w 'ch is located at each side of the machine, the hooks 64 will engage and raise the arms 56 unless these arms should happen to be already in their upper or set position.

The latches 55 or the portion of the arms 56 engaging them are of course beveled as shown in Fig. 7, or otherwise so constructed that the latchwill be swung aside when the arm 56 is raised from its lower to its upper position. v

In order that either one of the ribbon spools 43 may be rotated by hand, I provide a handle 34 on the shaft34, as shown in Fig. 4, said handle being clear of the machine Various modifications may be made without departing from the nature of my invention.

What I claim as new and desire to secure by Letters Patent is:

1. In a typewriter or like machine, a ribbonreverse mechanism comprising a longitudinally shifting shaft having gears for driving one ribbon spool or the other, collars rigidly carried by said shaft between the gears, and rigid shifting fingers arranged between each of the-collars and eachof the gears and adapted to directly engage the'collars.

2. In a typewriter or like machine, a ribbon reverse mechanism comprising a longitudinally shifting drive shaft having gears for driving one ribbon spool or the other, springrigidly carried by said shaft and rigid shifting fingers each adapted to directly engage one of said collars.

4. In a typewriter, or like machine, a ribbon reverse mechanism comprising a longitudinally shifting shaft having means for driving one ribbon spool or the other, springpressed push fingers, pivoted adjacent to the ends of said shaft, arms mounted to turn together with said push fingers, latches normally in the paths of said arms, connections from said latches to the ribbon to swing them aside when the ribbon is nearly unwound from the corresponding ribbon spool, and means arranged to engage said arms for setting the push fingers ready foroperation. 4 5. In -a typewriter, or like machine, a ribbon reversing mechanism com rising a longitudinally shifting drive sha t adapted to drive one ribbon spool or the other, springpressed push fingers for shifting said shaft, an'armconnected with each of said fingers, mechanism connected with the carriage shift key for engaging said arms and bringing the push fin ers to their set position, and latches arranger to hold said arms and adapted to be swung away-from them by the ribbon when the ribbon nears its end.

6. Ina typewriter, or like machine, a universal bar operated by the keys, a lever extending upwardly and arranged to be swung by the movement of said universal bar, an elbow lever operated by said swinging lever and a ribbon guide secured rigidly to said elbow lever.

7. In a typewriter, or like machine, a rib bon reversing mechanism comprising a longitudinally shifting drive shaft adapted to drive one ribbon spool or the other, springpressed push fingers for shifting said shaft, an arm connected with each of said fingers, lifting bars connected withthe carriage shift key, devices mounted on said lifting bars for engaging said arms to to their set position, and latches arranged to hold said arms and adapted to be swung away from them by the ribbon when the ribbon nears the end.

8. In a typewriter, or like machine, a ribbon reversing mechanism comprising a longitudinally shifting drive shaft adapted to drive one ribbon spool or the other, springpressed push fingers for shifting said shaft, an arm connected with each of said fingers, lifting bars connected with the carriage shift key, devices mounted on said lifting bars for engaging said arms to bring the push fingers to their set position, means for moving said devices out of the path of said arms after said fingers have been set, and latches arranged to hold said arms and adapted to be swung away from them by the ribbon when the ribbon nears its end.

9. In a typewriter or like machine, a swinging ribbon guide arranged adjacent to the printing point, a universal bar arranged to be operated by the keys, a connecting lever for transmitting the motion of the universal barto the ribbon guide, the ivot of said connecting lever being adjustab e in the direction of the levers length forthe purpose of varying the throw of the ribbon guide.

10. In a typewriter or like machine, a universal bar operated by the keys, a lever ex-- tending upwardly and arranged to be swung by the movement of said universal bar, an

elbow lever operated by said swinging lover,- a ribbon guide secured rigidly to said elbow lever, and means for permitting the adjustment of said ribbon guide on said elbow lever.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

FR-AN; X. WAGNER.

Witnesses:

JonN Lorna, JOHN A. ImnLnNBEcK.

Images