US1864594A - Typewriter - Google Patents

Description

Jun@ 28, 1932T o'. A. HoKANsoN ET AL TYPEWRITER Filed Jan. 4. 1929 5 Sheets-Sheet l june 28, 1932..v o, HOKANSQN ET AL ,86,594

TYPEWRITER 'Filed Jan. 4. 1929 3 sheets-sneu 2 Y lu;

O. A, HOKANSON ET AL TYPEWRITER 3 Sheets-Sheet 3 Filed Jan. 4. 1929 lll. In

' Patented -June 28, 1932 UNITED STATE-s PATENT GFF-ICE l TTO A. HOKAJISISON AND JAMES F. XC, OF'WOODSTOCLIIJJN-OIS, .ASSIGNORS T0 ,WOODBTOCK TYPEWRITEB, COIPANY,.0F WOODSTCX,

. .ILLINoIs ILLINoIs, .a conoaarIoN or 'rYrEwnrrEa i Application ined January 4,- 1929. serial no. 330,201.

This invention relates to typewriter mechanism in which the impression ribbon 4is 'moved to a positiongover the printing pointv at the platen -at each stroke of a type bar, and one of the objects of the invention is the provision of new and improved means by which thethrow of the ribbon may be varied and brought to rest inthe desired positions with accuracy and without overthrow. f

Y lo' Another object of thel invention is the pro? .4 vision of means for varying the setting of More particularly it is the object of theA present invention to provide improved-and eilicient mechanism for throwing the ribbon to different color positions without overthrow so that when one color'of ribbon, lsuch as black, is to be used, none of the other color, .such as'red, will appear on .the typewritin produced. Y Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claims.

In the accompanying drawingsv Fig. 1 is a sectional elevation of a typewriter embodying our invention and adapted to electrically operated type bar mechanism; Fig. 2 is a rear elevation of the line finder and ribbon carrier, together with the stop mechanism for limiting the throw of the ribbon vibrator;

Fig. 3 is a fragmentary view showing a side elevation of a portion of the structure -shown in Fig. 2;

Fig. 4 is' a sectional elevation of a portion of a typewriter illustrating our invention apthe impression of the =t plied to-manually operated type bar mechfrom the lfront of the machine instead of from -the' rear thereof as in Fig. 2.

In typewriters having-a front keyboard it -isycustomary to provide ribbon vibrator mechanism actuated b the type bars. for moving the ribbon over t e printing point to receive at the time` the type strikes the platen, the-"ribbon being withdrawn downward after' each impression to permit easy visibility of the matter typewritten. It is common to employ a two colorv ribbon, such as black and red, and to provide means for shifting either horizontal `zone'v cf the ribbon of one color or the otherover the printing pgint offt e platen so that the writing may in eithe one of the two colors, as desired. It is also desirable to pre- .vent the ribbon from being moved upwardly at all when atype bar is operated so that the; A ribbon will not-be'moved to the printing point and so that stencils may be cut 'The present invention provides or the accomplishment of all of these results in connection with manually operated typewriters, as well as in connection with electrically operated typewriters, with the assurance that there willnot be any overlapping ofthe colv ors in the' horizontal zones of the' ribbon 16 havin type vbars 17 pivoted thereto is supporte on the frame 15. An arcuate universal bar 18j lies in the pathof the type bars 17 i and is operated thereby in 'the manner similar to that shown in Patent No. 1,27 6,118,

, granted August'QO, 1918. Upon the opera- `tion of an type bar 17 on the pivot 19 the universal ar 18 is thrustrearwardlyfto bythe type.

0 era-te the escapement mechanism in aweillmown manner.

At the upper back'portion-of'the frame i of the typewriter is mounted a' rock shaft f 2o. This rock shaft 2 0 carries a forwardly extending arm 21 and infront of the arm 2-1 so as to move up' and down with the latter when `the shaft 2O is rocked, is a platen carriage shift rail 22 extending across the machine frame.

-A carriage frame 23 ismounted between.'

the' rails`24 and 25 which are fixed to the fra-me of the machine. A platen carriage 26 is mounted on links 27, 28 which permit the vertical movement of the platen 29 for Case shift. A roller 30 runs on the rail 22 by means of which the platen is lifted when the I its upper position.

vrock shaft 20 is oscillated by the shift key.

The shift key, not shown, has connection with f Depending.from the arm 21 is a bracket 31 to the lower end of which is pivoted a link 32 extending upwardly and at an angle and pivoted at l33 to the bell crank 34 which is connectedto the line finder 35. The bell crank 34 is pivoted at 36 to the bracket arm 37 that' is secured rigidly to the typewriter frame. The line finder is suitably guided to move vertically in front of the machine frame member 38 and back to the segment 16.' The line finder tension spring 39 is connected between the lower end of. the line finder and the bracket 40 which is fixed to the frame 38. This spring 39 is for the purpose of holding the upper edge of the line finder in yielding engagement with the platen.

Also depending from the arm 2l, as shown in Fig. 1, is another bracket arm 42 to which is pivoted at 43 the ribbon vibrator 44 which has a pin`.` and slot connection at 45 to the lower end of the ribbon holder 46 which is' guided in a frame fixed to the segment 16 in a plane in front of the planeof the line finder.

The Weight of the platenand the parts associated therewith act on the roller 30 and thence on the rail 22 to hold the arm 21 in its lower position and. therefore also the line finder and the ribbon vibrator, as shown in full. line in F ig. 1. When the shift key is depressed and the guide rail 22 elevated by rocking the shaft 20 the ribbon vibrator 44- .and the ribbon holder 46'will be elevated because of the forward movement of the bracket arm' 42. It should be understood, however, that the ribbon vibrator bail 44 is pivoted at 43 to the bracket arm 42 and not fixed thereto for reasons which will be hereinafter explained. Also, when the shift key is depressed and the guide rail 22 elevated the arm 31 will be moved forward or toward the keyboard of the typwriter which will result in movement of the adjustable link 32 forward and the movement of the bell crank 34 on the pivot v36 so as to elevate the line finder 'i in accordance with' the shifting of the platen to its upper position. While the line nder always ocupiesa fixed .relativeposition with the platen according to itsadJustment, the ribbon :vibraton operates independently .of

'lthel'ine linderandis shiftable to various posi- .'.tions according to whether one color or another. of the ribbonis desired for'the typelwriting to beaccomplished, or whether the typewriterribbonis to.' beuheld'out of the 'l In order that the' upper movement of the ribbon may always be arrested or stopped at the same definite position relative to the printingline, the `stop plate 47' (Fig. 2) is path .ofn the` type so" that' stencilin'g may be mounted on'the support for the line iinder so asto move up `and down with thelatter.

`This support comprises a plate 48 having arms 49 extending upwardly therefrom. i The line'lin'der 35 has an upper-.horizontal edge 50 for indicating the line position and is provided with an opening 51 for receiving the type bars. An inverted U-shaped portion 5'2 bridges the upper part of the opening 51 to assist in holding the paper inl position at the printing point.

The stop plate 47 is mounted to slide in a direction parallel to the line finder edge 50 and is permitted to have such sliding movement by reason of the pin and slot connections at 53, 53. The stop plate 47 is provided with. two horizontal stop edges 54 and 55 at different elevations, as shown in Fig. 2, so as toaarrest the ribbon either for black or` for -re `Mounted on the under side of thel frontof the top plate 15, as shown in Fig. 1, is a ribbonl shift lever bracket 56 to which is pivoted at '57 a bell crank 58 having at its outer end the ribbon shift lever knob 59. By moving the knob 59 over the arcuate surface of the bracket 56 the ribbon shift lever may be set l to indicate either red, black, or stenciling.

Movement ofA the ribbon shift lever 58 moves the ribbon shift link 60 which is connected to the bracket arm 61 on the rock shaft 62, as shown in Fig. 3. The rock shaft 62 is mounted in a bracket 63 which is rigidly Secured to the rear frame 15 of the typewriter. Also rigidly secured to the rock shaft 62 so as to move therewith is a bracket arm 64, as shown in Fig. 3, tothe upper end of which is pivoted at 65 a link 66. The other end of the link 66 is pivoted at 67 to the bell crank 68, the other arm of which/has an upstanding pin 69 which is engaged/by the slotted exi tension 70 which is secured to the stop plate 47. Fig. 3 shows in elevation the connections foroperating the stop plate 47, whereas vations.

Downward movement of the ribbon vibrator is limited by the lever 1,11 striking4 against the adjustable abutment screw 124, as shown in Fi 1, because as hereinafter more fully described, the bail 44 is connected by the link 114. to the lever 111 which isfpiv'oted at 112 to the bracket 122 rigidly connected to the frame of the machine. The initial position of the ribbon vibrator may therefore be accurately adjusted by means of the abutment screw 124: It should be understood that the pin 74 which is fixed to the segment 16 projects into the slot 75 of the downward extension 76 of the ribbon holder- 46 for the purpose of acting as a vertical guide for the ribbon holder 46. As shown in Fig. 1, the

.frame 37, as shown in Fig.2. Tfhere is therefore a positive movement of both the line finder land the ribbon vibrator up and down in accordance withthe up and down case shifting. The stop plate 47 being mounted on the line finder 29 by reason ofthe pin and slot connections at 53, 53 moves up and down with the line finder", but the stop plate extension 70 remains connected to the upstanding pin 69 on the bell crank 68, the height of the pin 69 being suilicient to always retainconnection between the bell crank 68 and the stop plate 47 for the various heights of the latter.

It should be particularly understood that i it is desirable to maintain a proper relation of the ribbon with the platen both when the platen is in its lower position and when it is in its upper, position. It is for this reason that the stop plate 47 moves up and down with the line finder so that the stop plate, as

' well as the line finder, may. always be in the same' relative position to the platen. The ribbon-vibrator will then be stopped in its .upward movement in its desired* position relative to theplaten whetherthe case shifting movement has been eiectedor not.

Referring to Fig'. 1 *showing a power ratchet roller' 77 of an electric typewriter, it

" will be seen that when the key lever 7 Sis de lever 81 will be brought into engagement with vthe power roller 7 and then be disengaged therefrom 'by striking the abutment 82. While the operating lever 81 is in engagement with the ower roller 77 a. forward pull Will be exertedJ 82 with the sub-lever 83, the lower end of which is connected at 84 to the machine frame 85 and the upperdend of which has a pin and on the pivoted connection'at slot connection at 86 with the type bar 17 lower portion of the typewriter frame and is provided with a restoring spring 93, as

shown in Fig. 1.

The arms 89 are connected to a rock shaft 94, the ends of which are pivoted as illustrat- At the central rtion ofthe rock shaft 94 is an upstanding racket arm 95, the upper end of which has a screw and slot connection' at 96S with the bell crank lever 97. This bell crank .lever 97 is pivoted at 98 to the lower portion of the arm 95. A spring 99 is con' nected between the upper'end of the lever 97 and the pin 100 attached to the frame 101 of a typewriting machine. The screw and slot connection 96` is for the pur ose of adjusting the position of the bell crank 97 on the pivot 98 relative to the arm 95, but when in adjus'ted position the bell crank 97 is rigidly connected to the arm and moves therewith and this arm 95 is in turn rigidly connected to the rock sha-ft 94 so as to move in unison with the arm 89. It will thus be seen that when the actuating lever 81 is thrust forward by the power roller 77 the hook lever 87 by engaging the bar ed at 90 in Fig. 1 to the ma'ehine frame 91.

88 moves the arm 89 forward on the pivot 90 which is pivoted at 107 to the lower end of the crank arm 108,v the latter being rigidly connected to the rock shaft '62. By referring tov Fig. 3,;it .will be seen that thefrock :shaft'62 also carries the cranks 61 and 64. Conseat 102 to the lower end of the link pivoted at 105 the link 106,'the rear end of p quently' when th shift lever 58'is moved up or down the link 60 willrock theshaft 62 and Y therefore not only position the stop plate 47 but also swing the link 103 forwardly or `rearwardly on the pivot 102 to position the upper end portion 109 which isy provided with a slot of a special configuration or contour to co-" operate 'withthejpin 110 which extends laterally from one arirofthe bell crank 111 which4 b5on. By moving the knob 59 to its position Y is pivoted at 112 to the machine frame 101. The rear arm of the bell crank 111 is pivoted at 113 to the link 114, theI forward end'of which has a pivotal connection at 115 to the ribbon vibrator bail 44.

The slotted head 109 at the upper. end of the link 103 has in reality threeslots 116, 117 and 118.. The ribbon stop shift lever 58 ma occupy three different positions correspon ing to the slots 116, 117 and 118 and the movement of the knob 59 to the three different positions will set the slots 116, 117 and 118 correspondingly. For instance, the knob 59 may be set for typewriting 0n the red zoney ofthe ribbon and the shaft 62 rocked to move the lever 103 forwardly to its forward limit, thus placing the slot 116 over the pin 110. By lacing the knob 59 in its mid-position the shaft v62 may be rocked soas to move the slot 117 to the position shown in full lines in Figs. 1 and 4 for the stenciling position of the ribfor typewriting on the black zone of the ribbon the slot 118 may b e moved to its rear pof sition over the pin 110 so as to permit a limit'- ed movement of the latter. In other words, simultaneously with the shifting of the stop plate 47 by operating the knob 59, the lever v 103 may be moved arcuatel on its pivot 102 so as to vary the position o the slots 116, 117

Yand 118 relative to the pin 110. Y

It' can readily be seen that when the type- .writer key 78 is operated to eiect forward movement of the arm 89 and downward movement of the link 103 if the slot 117 is over the pin 110, as shown in full lines in Fig. 1, the

i downward movement of the lever 103 will not be suflicient to engage the pin 110 and therefore no movementof the bell crank 111 will take place on the rock shaft 107 andconsequently the link 114 will not be moved fQrward andthe ribbon vibrator 46 will not be moved upwardly, but will remain in its lower position so that stenciling may be done. This is true also for case shifting because of the bracket arm connections 42 and 31 with the arm 21, as shown in Fig. 1. That is, although the ribbon vibrator moves up and down during case shifting, there will be no movement of the ribbon vibrator relativel to the laten after the latter has been shifte Therefbre the small letters will be stenciled whenthe platen is in its lower osition and capital letters will be stenciled w en the platen is in its other position, because in neither position can the ribbon vibrator be operated because the slot 117 is so long as to prevent downward movementof thelink 103 from engaging thepin 110. l Y

If `the red zone on the ribbon is on the lower half of the ribbon it will be desired to move the ribbon upwardly to a maximum extent and the knob 59 should therefore be moved s o that the slot 116 will be moved over the nin 110. This is done by rotating the down the pin 110 will'be immediately shaft 62 in a' clockwise direction, as illuswhen the arm 2l is moved up or down the i ribbon vibrator is maintained in the .same relative position to the platen and therefore the movement of ribbon vibrator eiected by the downward movement of thelinkv 103 is an added movement-of the ribbon to its position either in lower case or upper case.

It will also be seen that when the knob 59 is -moved up torock the shaft. 62 in a clockwise direction to bring the slot 116 over the pin 110the link 66 will be pulled to the right, as viewed in Fig. 3, and as shown` in Fig.5, this results in a pulling out of the s'top extension 70, that is, the stop plate 47 will pulled to the left, as viewed in Fig. 2, thereby bringing the stop edge 47 vinto the path of the p1n-7 3 -which is shown in Figs. 1 and 2.

The stop pin 73 is connected to the ribbon vibrator lto -move up and down therewith. In electric typewriters where kthe operation is very quick when the-` type bars are actuated, it is particularly desirable to have the stop ribbon. The ribbon ishould stop as to properly print the whole type each time it is struck 'and the red should not overlap theu black. l.

- It should be particularly noted that both in the manual'operation and in the electrical operation, the upper edge of the slot 116 will edges 54 and 55 prevent overthrow of the. i

engage the pin so as tosta'rt the upward movement ofthe ribbon holder just as soon as the type bar is begun to be operated so as to assure movement of the lower or red zone y red.

When lit is desired to lprint through the black zone of the typewriter ribbon the knob 59 mayxbe moved to its lowermost limit to rock the shaft 62 in an anti-clockwi'se-direction, thus pulling the upper end of the link S1103 toward the right to bring the slot 118 over the pin 110.4 Then when the type bar is operated ther'lnk 103 will have a certain downward lost motion before the upper edge of the slot 118 engages the pin 110 to move the crank 111'on its pivot 112 and thereby eect forward movement of the link 114 and the swinging upwardly of the ribbon vibrator bail 44 on its pivot 4 3. The ribbon vibrator will therefore be movedupwardly partially so as to bring the upper black zone of the ribbon into proper position relative to the platen. This is true both as to the upper .case and lower case, because whatever the '-in Fi 3 will be moved in an anti-clockwise directlon and therefore the link 66 will be pushed toward the left which, as shown in Fig. 5, will efect a pushing-in of the eiiten sion 70 `so'as to move the stop edge 55 toward the right, as viewed in kFig. 2. The' stop edge 55 will therefore be brought over the top of the pin 73 so as to limit the upward throw of the ribbon vibrator. t should be particularly understood that the stop edges 54 and 55 arearranged to be so located as not toprevent the full movement l of the ribbon that is desired by the setting orpositioning of the slots 116 and 118, but these stop edges are in position to prevent any excess movement beyond the' desired throwof the ribbon so that notwithstanding the very rapid 4operation of electric typewriters the ribbon will not be thrown up-'v wardly any farther than is desired.

manually operatedl typewriters, as shown in Fig. 4. The key lever 78 may be connected as shown at 119 to the sub-lever 83 which is pivoted at 84 to the machine frame 85. The rear end of thekey lever may be pivoted at 92 tothe machineframe 91 and be provided with a restoring spring 93. At 90 is pivoted to the machine frame 91 a rock shaft 94 which is secured to a bell crank 95- having a lateral clockwise direction. Pivoted at 98 to the bell crank 95 is another bell crank97 whichhas is the position for stenciling.

a screw and slot adjusting connection at 96.

`When the lever 78 is depressed to engage the extension 120 the bell crank 95will by reason of its connection at 96 and 98 act against the spring 99 to move down the forward extending arm of the bell crank 97 which forward extending arm is pivotedfat 102 to the lower end of the link 103.

Downward movement of the link 103 being thus secured by depressing manuall any one of the key levers 78, the ribbon vi rater may be operated to either the position represented by the slot 116 or the position represented by the slotl 118, or when the slotv 117'is over the pin 110 the ribbon will not be y moved upwardlywhich, as" above explained,

It should beunderstood that during the operation of the ribbon vibrator there is no lost motion between the bell crank leverv 97 and the crank arm 95, the slot 96 being for the purpose of affording adjustment of the bell crank lever 97 relative to the crank arm 95. After such adjustment is made the set screw 121 is tightened to hold the crank arm 97 rigidly connected to the arm 95 to move' therewith. Therefore when the arm 89 moves, the rock shaft 94 and the bell crank 97 move therewith, being rigidly connected to the arm 89. In other words, since the armv 89, rock shaft 94, arm 95 and bell crank 97 are rigidly connected together, forward movement of the universal bar 88 will immediately` impart downward movement t0 the pivot 102 and therefore to the link 103.

`A retracting spring 122 is connected between the crank arm 111 and the bracket 123 which is connected rigidly to the machine frame. An 'adjustable abutment or stop screw 124 is mounted on the bracket 123 in position to engage the rear upper 'ed e of the rear arm of the bell crank 111 to a just the ribbon to its initial position. The stop screw 124 may be held in adjusted position by means of the nut 125. The spring 122 therefore actsas' a restoring spring for the ribbon vibrator so thatimmediatel after the type of the actuating members 81 on the bar 88 k Will ermit the s rin ,122 to return th rib- Our improvements are also applicable to P P g e bon vibrator to its lower position. .The spring 99` also acts upon therelease of the bar 88 to restore the lever89 to its initial position. When this occurs the in 110 will be engaged by the -bottom edge of) the slot in the'slctted head 109, thereby limiting the upward movement of the link 103 and the rearward movement of the arm`89,

It should be .understood that the part designated 88 is in reality a universal bar in that it extends between bracket arms 89 atthe sides of the machine frame so that all of the actuating members 81, one for each of the key levers 78, may hook over the universal bar 88 by means of the extensions 87. In the form shown in Fig. 4, the part designated 120 is a universal bar extending between the brackets 95 at the sides of the machine frame so that depression of any of the key levers 78 will move down the universal bar 120.

In the application of Otto A. Hokanson,

Serial No. 738,982, iled'September 22, 1924,

.now Patent No. 1,691,063, granted November soci'ating with the line finder and ri bon vibrator simpler more eiicient mechanism for operating the ribbon vibrator to properly Ihas struck the platen the re ease of the pull so also the s ring position it for different color zon'es of the ribbon and for stenciling, when the printing is being done in upper case and when it is being done in lower case, both in an electrically operated typewriter and in a manually operated typewriter.

Obviously those skilled in the art may make various changes inthe details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claims hereto appended and we wish therefore not to be restricted to the precise construction herein disclosed.

Having thus fully disclosed an embodiment of our invention, what we desire to secure by Letters Patent of the United States 1s:

1. In a typewriter, in combination with the frame of the machine a ribbon vibrator, a universal bar, a lever a apted to be moved by the-movement of the said universal bar, a relatively long link ada ted to be pivoted in one end of said. lever, sa1d link having an inverted T-shaped. slot in its upper end and having a laterally projecting arm substantially intermediate its length, aleyer pivoted at one end to said arm, a second lever pivoted to the opposite end of said lever, said vsecond lever being pivotally mounted on a .rock

shaft, a platen-shifting member, a substantially cradle-shaped lever pivotally carried on said platen-shifting member, a bell crank lever pivotally mounted on the frame of the machine and having one arm thereof carrying a pin lying in the inverted T-shaped slot of the link, the other arm ofthe bell crank lever being pivotally mounted to an additional lever, said additional lever being pivotally mounted in turn to the cradle-shaped lever, and 'a ribbon vibrator connected to the cradle-shaped lever.

2. In a typwriter, in combination with the machine frame, a key lever having its rear end pivoted to the frame, a sub-lever foroperatin the type bar, said sub-lever being pivote to the frame, a restoring spring -mounted on the frame and beneath the rear end of the key lever, a rock shaft pivoted to the frame, a lever pivoted to the rock shaft, a bell crank pivotally mounted on said lever and havin an adjustable connection therewith, a lin pivoted to said bellcrank, said link having an inverted T-shaped slot at its upper end, a laten-shifting member, a ribbon vibrator ever pivotally carried by the platen-shifting member, .a ribbon vibrator connected to said ribbon vibrator lever, an upper bell crank ivotally mounted on the frameof the inac ine and havin an arm carrying a pin lyin in the slot o the link, the second arm of t e upper bell crank hav- 4ing a lever pivoted thereto, said lever being and for shifting the rock shaft, whereby to,

actuate the link.

3. In an electric typewriter, the combination with a power roller, of a key lever, an actuating member, means operatedby said key lever for connecting said actuating member to said power roller, a type bar, a sublever connected to said actuating member and to said type b ar, a hooked extension for said actuating member, a universal bar engaged by said hooked extension, a ribbon vibrator, and means conected between said universal bar and said ribbon vibrator for operating the latter.

4. In a typwriter, in combination with the machine frame, a key lever having its rear end pivoted to the frame, a sub lever conbrator lever pivotally carriedthereon, a rib- A' bon vibrator connected to said ribbon vibrator lever, a third bell crank pivotally connected to the machine, one arm of said third bell crank having a pin lying in the slot of said link, and the other arm of said third bell crank having a lever pivoted thereto, said lever being pivotally connected to the ribbon vibrator lever.`

5. In a typewriter, the combination with a key lever, of a type bar, a sub-lever con'- nected to said type bar for actuating the same, an actuating member connected to said sub-lever, a power shaft, means for con'necting said actuating member to said ower shaft upon the depression of sai key lever, a hooked extension on said actuating member, a universal bar engaged by said hooked .extension when said sublever actuates said type bar, a ribbon vibrator, and means connected between said universal bar and said ribbon vibrator for operatin the latter in unison with the operation of t e type bar.

6. In a typewriter, the combination with bar, mechanism for oplever, a hooked extension from said operating means, a universal bar engaged by said hooked extension, a bell crank pivoted to the frame of the machine and having one arm supporting said universal bar, a ribbon vibrator, and means connected to said bell crank for operating said ribbon vibrator. y

8. ln a typewriter, the combination with a constantly rotating power shaft, of a key lever, an actuating member, means operated by said key lever for connecting said actuating member to said power shaft, a type bar, a sub-leverv connected to said actuating meinber and to said type bar, an extension for said actuating member, a ribbon vibrator, and means connected between said extension and said ribbon vibrator for operating the latter.

9. In a typewriter, the combination with a key lever, of a type bar, mechanism for operating the type bar upon depression of the key lever, an extension from said operating mechanism, a universal bar engaged by said extension, a ribbon vibrator, and means comprising an oscillating actuating member connected to said universal bar for operating said ribbon vibrator.

10. In a typewriter, the combination With a key lever, of a type bar, means for operating said type bar upon depression of said key lever, an extension from said operating means, a universal bar engaged by said eX- tension, a bell crank pivoted to the frame of the machine and having means for supporting said universal bar, a ribbon vibrator, and means connected to said bell crank for operating said ribbon vibrator.

In testimony whereof we have signed our names to this speciiication on this 31st day of December, A. D. 1928.

OTTO A. HOKANSON. JAMES F. KOCA.

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