US1397166A

US1397166A - holden

Info

Publication number: US1397166A
Authority: US
Priority date: 1920-05-20
Publication date: 1921-11-15
Anticipated expiration: 1938-11-15
Also published as: GB166775A

Description

4 SHEETS-SHEET I.

Patented Nov. 15,1921.

`1. B. HOLDEN. TYPEWRITING MACHINE.-

APPLICATION FILED MAK. 2| 1920.

WITNEESEE 7%; M

. www5 1. B. HOLDEN.

TYPEwRm-Ne mAcHmna.

APPLICATION FILED MAR. 2. 1920. v`

Patented'Nov. 15, 1921.

4 SHEETS-SHEET 2.

INVENTUR H|5 ATTURNEY J. B. HOLDEN.

IYPEWIIITING MACHINE. APPLICATION FILED MAR. 2, I920.

' Patented Nov. 15, 1921.

4 SHEETS-SNEP! 3.

T 555:@ III/ENTER NES j V2M l @IMK (f3/4 HIS ATIIIIINEY l. B. HOLDEN.

TYPEWRITING MACHINE.

APPLICATION HLED Mmm, 1920.

Patented Nov. 15, 1921.-

4 SHEETS-SHEET 4.

WITNEEEEE 7 M h INVENTR /frC-Pw ZM H15 ATTURNEY UNITED STATES PATENT OFFICE.

JOSEPH B. HOLDEN, 0F UTICAfNEW YORK, ASSIGNOR TO REMINGTON TYPEWRITER COMPANY, OF ILION, NEW YORK, A; CORPORATION 0F NEW YORK.

'rYrEWRITING-MAGHINE.

Specification of Letters Patent.

Patented Nov. 15, 1921.

Application led March 2, 1920. SeriaLNo. 362,675.

To ZZ Lo/tom t may concern.'

Be it known that I, JOSEPH B. HOLDEN, citizenof the United States, and resident of of Utica, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Typewriting- Machines, of which the following is a speciication.

My invention relates to typewriting machines and it has for its principal obj ect to provide various improvements in the ribbon feed and reverse mechanism of such machines.

I have shown my invention embodied in a portable typewriter and some of its features are especially designed for use in machines of that class but other of said featuresare adapted or can readily be adapted to the larger standard typewriters, and other machines that print with an ink ribbon.

My invention includes novelV ribbon vibrator mechanism capable of being adjusted for diHerent extents of throw of the vibrator to write in different colors, novel ribbon feed mechanism, and certain details of the ribbon mechanism. The claims of this case are directed to the vibrator mechanism, other features of the ribbon mechanism being claimed in divisional applications.

To the above and other ends my invention consists in certain features of construction and combinations and arrangements of parts all of which will be fully set forth herein and particularly pointed out in the claims.

One embodiment of my invention is illustrated in the accompanying drawings, in which-g Figure l is a front to rear vertical sectional view partly on the line i12- x of Fig. 4 of a portable typewriter having my invention embodied therein, only so much of the machine being shown as is necessary to a full understanding of the invention.

Fig. 2 is a view on an enlarged scale of certain parts of the ribbon feed mechanism, the same being shown in section through the main feed shaft.

Fig. 3 is an enlarged perspective view of the parts shown in Fig. 2. y

Fig. 4 is a front elevation of the rear part of the machine including a considerable part of my improvements, parts of the machine being shown in section on the line y--y of Fig. 1.

Figs. 5 and 6 are enlarged sectional views through the middle of one of the ribbon spools and some of the associated parts. In Fig. 6 a certain spool retaining device is shown in normal position and in Fig. 5 said device is shown in released position.

Fig. 7 is a plan view with parts in section on the line a-z of Fig. 1.V

Fig. 8 is a fragmentary plan view of a portion of the vibrator movement, the parts being shown by full lines in position for writing by the upper stripe of the ribbon and in broken lines in position for writing by the lower stripe of the ribbon.

Fig. 9 is a perspective view of part of the mechanism shown in Fig. 8.

Fig. 10 is a greatly enlarged view, in side elevation and with parts in section and illustrates the mechanism for giving the differential throw of the ribbon vibrator. In this View the part-s are shown in the position they occupy at the end of the down stroke of a key, when the mechanism is set to write from the lower or red stripe of the ribbon.

The typewriting machine partially shown in the drawings is similar to and as far as my invention is concerned may be identical with the one shown and described in the patent to A. W. Smith, No. 1,342,513, dated June 8, 1920, but as far as most of the features are concerned the details of construction of the machine can be varied and in fact some of the features of my invention are applicable to ink` ribbon mechianisms generally. Y

The main frame of the machine shown in the drawings comprises sheet metal side plates 1 rigidly connected together by several frame members. of a front comb plate 2 also of sheet metal and having a series of slots cut both along its upper edge and along its lower edge. `Said plate is fastened by means of screws 3 to lugs 4 bent inward from the side plates 1. Near to the back of the machine said side plates are connected by a casting designated generally by the numeral 5 and comprising among other things a-type bar lsegment 6 and a sublever segment 7 these segments being integral parts of the casting, which casting at its ends extends to and is rigidly secured to each ofthe side plates 1.

One of these consists' secured to the side plates 1 by screws 13, Fig. 4.

rThe type action of this machine includesv top strike type bars 14, Fig. 1, pivoted on a wire 15 supported by the segment 6, which segment is radially slotted to accommodate said type bars. Each of the type bars 14 has on the heel thereof gear teeth meshing with suitable gear teeth on a sublever 16, all of said sublevers working in radial slots of the segment 7 to which they are pivoted on a curved wire 17. Each of the sublevers 16 has a restoring spring 18 and each of said sublevers is connected at its forward end by a link 2O with another sublever 21. The sublevers 21 are mostly levers of the third order each mounted in one of the slots in the upper edge of the comb plate 2 where said sublevers are retained in place by a guard plate 22 constituting part of the casing of the machine. Each of the sublevers 21 is connected by a depending link 23 with a key lever 24 having a printing key 25 on its forward end. The key levers 24 are pivoted at their rear ends in a comb plate 26 having a wire 27 supported thereby to retain the key levers in place. 'The comb plate 26 is stationary; the supports are not shown in the drawings, but it is preferably supported from the casting 5.

The machine has a collapsing feature ac cording to which the type bars 14 can be dropped down from the upstanding position shown in Fig. 1 to a substantially horizontal position. This feature is fully set forth in the patent to A. W. Smith above referred to and it includes a type rest 28 mounted on a segmental support 30 which support can be elevated to the position shown inFig. 1 or can be moved downward into the depressed central part of the top plate 10, allowing the type bars tol drop back into said depressed part of the top plate to make the machine more compact.

The platen 31 is situated in rear of the type bar segment 6 and the type bars are adapted to strike down upon the top of said platen. Each of said type bars carries two types and the platen 31 is made shiftable to print from either type. This platen is mounted on a carriage 32 supported by ball.

bearing balls 33, said balls running` in grooved rails 34 which rails are mounted on brackets 35 constituting part of a case shift frame capable of being shifted toward the rear of the machine from the position shown' in order to print the upper case characters.

The case shift frame includes side bars 36, one mounted just inside each of the side platesl. These plates or bars 36 terminate at their forward ends just in rear of the comb plate '2*where each of them is pivoted at 37 to an arm 38 rigidly secured to a transverse rock shaft 40 journaled at its ends in the side vplates 1. rlhe construction is such that the forward ends of the shift frame are supported by the shaft 40l and said frame can be shifted by rocking said shaft which will insure thaty the two sides of it move alike. The bars 36 extend rearward nearly to the back of the machine and at their rear ends each of them has a downward extension from which a horizontal bracket 41 is bent inward as shown in Figs. 1, 4 and 7. As best shown in Fig. 4 each of said bars 36 has also an upward extension Vbent inward to form a bracket or a shelf 42 on which one of the ribbon spools and associated devices are mounted. This shelf is almost entirely hidden in Fig. 1. The two side bars 36 are connected together at their rear ends by a sheet metal cross bar 43, Fig. 4, which at its ends lies on the brackets 41 to which it is secured by screws 44. The brackets 35 to which the carriage rails 34 are directly secured, consist of right and left-hand rearward extensions of this bar 43.

The bars 36 aresupported at their rear ends in the following manner Each of the brackets 41 has bent off therefrom an ear 45, Fig. 1, which at its rear end is pivoted at 46 to an upstanding link 47 which in turn is pivoted at 48 to a rearward extension of one of the side plates 1. Restoring springs 50 for the shift frame are connected with parts of these brackets 35. Somewhat toward the front of the machine each of the side bars 36 has a device 51 secured thereto with which cooperate certain stops (not shown) for limiting the motion of the shift frame. A

A universal bar 52 underlying all of the key levers 24 is carried at its ends by levers 53 each pivoted at 54 to one of the bars 36 of the shift frame, so that this universal bar partakes of the shifting motion of said frame. Tn the vicinity of the pivot 54 the two arms 53 are connected by a cross bar 55 which of course partakes of the oscillating motion of the universal bar when the latter is operated by the key levers. 1n the present instance the ribbon mechanism is operated yfrom this cross bar 55 as will hereinafter appear. The universal bar is provided with any suitable restoring springs 49.

A shaft 56, Figs. 1, 4 and 7 is located just in front of the platen 31 and said shaft is mounted on pivot screws 57 supported by brackets 56 bent up from the same piece of metal as the cross bar 43 of the shift frame. This shaft at its middle carries the escapement feed dogs for controlling the feed of the carriage but to avoid'confusion inthe drawings neither said feed dogs nor the rack with which they coperate is shown herein. The shaft 56 at each end thereof carries a forwardly and downwardly inclined arm which is operated by a pin 60 carried by the rear end of the lever arm 53 of the universal bar frame, but these arms have also been omitted from the drawings to avoid confusion. The construction thus far described is or may be substantially the same as that disclosed in the patent to A. W. Smith, hereinbefore referred to.

The ribbon spools 61 are alike and are of ordinary construction except that the lower flange of each has any suitable number of lugs 62 struck down therefrom out of the metal of the flange for coperation with the driving mechanism, as will hereinafter appear. The two flanges are connected by a. drum 63 on which the ribbon 64 is wound. Each spool is mounted on a vertical post 65 having a flange 66 on which the spool rests, said flange as here shown being enlarged into a nut 67. The post is interiorly threaded and is screwed down onto the screw threaded end 68 of another post 70, Fig. 6, which post is mounted on one of the brackets 42 of the shift frame to which it is riveted at 71. Below the screw threaded part 68 the post 70 has a bearing part 72 on which is journaled a beveled gear wheel 73 having a pin 74 projecting upward therefrom to such an extent as to coperate with the lugs 62 of the ribbon spool, so that if the wheel 73 be turned the spool will turn with it. The nut part 67 of the post 65 serves as a retaining nut for the wheel 73. The spools 6l can be readily removed from the machine by merely lifting them ofil from their posts 65.

I have provided a novel retaining device to prevent accidental displacement of the spools. The post 65 is drilled or bored out from its lower end but the hole does not eX- tend entirely through it but terminates at 75. The upper end of the post is diametrically slotted as indicated in the drawings, the slot communicating with the round opening or hole in the post and a retaining device 76 is inserted into the slot and eX- tends on down into the enlarged round hole. The retaining device 76 is made of flat stock and it includes a lug or nose 77 which normally extends out over the top of the ribbon spool 6l as shown in Fig. 6 and prevents said spool from accidental displacement from the post. Said retaining device also includes a part 78 shaped to constitute a handle. The retaining device 7 6 has riveted to its lower end a washer 80 and a spring 81 is coiled about the part 76 and is compressed bet-Ween said washer and the upper wall 75 of the round hole. The movement of the device 76 under the pressure of the spring 81 is limited by a lug consisting of a pin 82 inserted in said device above the top of the post and normally resting on a lower flat part 83 of said top.

The top of the post has an elevated part or lug 84 and when the device 76 is pushed back from the position shown in Fig. 6 to the position shown in Fig. 5 saidpin rides on the elevation 8e. In this position of the parts the spool can be lifted off without obstruction. When the retaining device is in its normal position shown in Fig. 6 the shoulder between the two parts 83 andY 84- of the top of the post prevents accidental displacement of the retaining device. It will be perceived that this device is effective in preventing any accidental displacement of the spool but that it can be instant-ly moved out of the way by merely pressing it toward the rear to the Fig. 5 position so that the device is extremely convenient for its purpose.

The ribbon. feed mechanism includes a drive shaft 85 having thereon two bevel pinions 86 for driving the bevel gears 7 3 alternatively. The shaft 85 is journaled in the posts 70 as shown in Fig. 6, and it can be shifted endwise to move one of the pinions 86 out of engagement with its gear 73 and the other pinion 86 into engagement with its gear7 to reverse the direction of ribbon feed. In the present instance this reverse is effected manually, no automatic reversing means being shown, lthough it is obvious that such automatic means can be provided if desired. The shaft 85 projects slightly beyond the casing 8 at both ends where it is equipped with milled heads 87 by a manipulation of which the shaft can be shifted to reverse the feed and also the shaft can be turned in order to` wind the ribbon manually onto one of the spools.

I have shown an exceedingly simple detent device to retain the shaft in either of its two positions. As shown in Figs. l and 7 said shaft has two grooves 88 turned therein and said grooves are connected by a rounded bulging part of the shaft. A wire loop 90 is secured at its ends to one of the brackets 42 by being inserted through holes in said bracket and bent into close cont-act with the upper and lower surfaces of the bracket as shown in Fig. 4l, and the end of said loop is pressed upward by the resilience of the wire into one of the grooves'88. The shaft cannot slide endwise without springing this wire downward over the bulge in the shaft, but the shaft can be pushed endwise bythe application of a little force. The extreme simplicity, cheapness and lightness of this retaining device are advantageous and especially so in a portable typewriter.

The shaft 85 is driven step by step by the oscillations of the universal bar 52. A ratchet wheel 91. Figs. l, 2 and 3, is secured upon the reduced end of a hub 92 which hub is mounted on the shaft 85 to which it is rigidly connected as by a pin 93. The hub device 92 has a flange 94 and on a ste Vof said hub between said .flange and the w eel 91 there is ournaled an oscillatory device 95, which hangs down at an inclination toward the front of the machine and has a slot 96 therein. A sheet metal pawl 97 is pivoted to the device 95 on a screw 98 and is pressed by a spring 100 into engagementl with the teeth of the ratchet wheel 91. This pawl as here shown comprises two ears 101 which are journaled on the pivot screw 98 and a third ear 102 to which the spring 100 is connected at one end, the other end of said spring being connected to a pin 103. The construction is such that if the device 95 be oscillated back and forth the pawl 97 will intermittently turn the ratchet wheel 91 .in the direction of the arrows in Figs. 1 and3, that is to say. toward the rear of the machine at its top. This pawl and ratchet combination is thus permanently mounted on the shaft 85 not far from the middle of the machine. By mountingv the operating device 95 on the shaft itself the pawl 97 is caused to engage the ratchet wheel 91 correctly even though the shaft may spring a little. It will be perceived that this pawl and ratchet combination is shifted to the right and left a short distance when the shaft 85 is shifted to reverse the feed.

The actuating device 95 is operated by a pin 104 projecting transversely from an arm 105 which arm as shown in Figs. 1 and 7 is secured by two screws 106 to the cross bar 55 of the universal bar frame. The pin 104 is made long enough so that it remains in the slot 96 in both positions of the shaft 85. In the present instance the arm 105 is bent at a right angle at 107 to bring the sheet metal of which the arm is made into two planes, the upper part of the arm being in a vertical plane and the lower part in a transverse plane so that it can lie flat on the bar 55. Backward rotation of the ratchet wheel 91 may be prevented by any suitable retaining pawl. In the present instance a pawl 108 made of sheet metal has ears 110 bent back therefrom and pivoted on the escapement shaft 56 where it is retained in place lengthwise of said shaft by means of a rcollar 111, Fig. 7, situated between the two ears 110 and secured to the shaft by a set screw 112. It will be noted that the engaging end of the pawl 108 is made wide enough to allow for the longitudinal shifting of the ratchet wheel 91 with the shaft 85. As shown in Figs. 1 and 7 the frame plate 1 as well as the casing 8 has a notch 113 for the accommodation of the end parts of the shaft 85, this notch opening toward the rear and allowing for the shifting motion of said shaft front and rear in the case shifting operation.

I have shown a pressure plate 114, Figs. 4 and 7 adjacent to each ribbon spool and spring pressed against the ribbon. This plate can be variously constructed and mounted. As here shown it is pivoted on a pivot screw 115 screwed into the upper end of a post 116 which post rises from a bracket 117 secured as by screws 118 to the bracket 42 of the shift frame. A. spring 120 coiled about the post 116 presses the plate 114 against the ribbon. This pressure plate is herein employed for the same purpose as similar devices in other machines.

A ribbon vibrator 121 guides the ribbon in its course from one spool to the other. Said vibrator consists of a piece of sheet metal suitably cut out and formed at its rear end to guide the ribbon and lying beneath a flat bracket 122 which serves as support and guide for the vibrator. Said vibrator has tongues or branches 123 projecting from yits sides and bent first upward and thence inward to embrace the straight edges of the bracket 122, the construction being such that the vibrator slides freely on said bracket. The bracket 122 slopes somewhat upward and vtoward the rear and said bracket is secured by screws 124 to the rear face of the type bar segment 6, which constitutes part of the stationary casting 5. A link 125 is at its upper end pivoted to the vibrator on a pin 126 and at its lower forward end it is pivoted on a pin 127 to a lever arm 128 constituting part of a frame which is pivoted at 130 to a. bracket 131. Said bracket 131 is part of a fix-ture 132, which fixture is secured by screws at 133 to the under side of the cross bar 43 of the shift frame. The construction is such that the lever arm 128 and the vibrator are shifted front and back with the shift frame and the platen which is ca-rried thereby. The lever of which the arm 128 is a part, is made of sheet metal and in addition to the arm or branch 128 it includes another arm or branch 134; the two

branches

128 and 134 being connected by a yoke 135, Fig. 9. This entire lever frame is made of a single piece of sheet metal, the branches 128 and134 being bent up into vertical planes from the yoke 135 and both of said arms are pivoted on the ends of the pivot pin 130 which as shown in Fig. 8 is an elongated pin supported by the rolled-up lower edge of the bracket 131. The

parts

128 and 134 may be considered as two branches of a lever arm which extends approximately horizontally forward from the pivot 130 and the arm or branch 128 is prolonged upward to its pivotal connection with the link 125 as shown. Said arm 128 has a slot 136 near the forward end of its horizontal part, and the arm 134 is bifurcated at its forward end having two

fingers

137 and 138, leaving an open-ended slot between. A wire connector 140 passes through the slot 136 and between the

fingers

137 and 138 and is prolonged toward the right as shown in Fig. 8 until it reaches nearly the right-hand side of the machine where it is bent to form a rearwardly directed section 141 and it is thence towarc the right to forin anot ier transverse section 142. Said section 142 passes loosely through a hole in a bracket 143 depending from the` righthan( brackct41 of the case shift fraaie. ifiis whole wire shifts front and rear with the shift frame yas do also ofcourse the lever arm 128 and all of its asscciated devices. Between the

arms

128 and 134 the wire 140 is bent toward the rear at an inclination producing aninclined section 144 and thence directly toward the left, producing a transverse section145 which passes through the slot 136 andwhich is off-set rearward from the main section 140. ,The lever arm 128 has a bracket 146 bent off from its lower edge toward the left and thence upward, the upstanding part of said bracket terminating in two tines or fingers between which the section 145 of the wire 140 passes. The construction is such that the wire can be adjusted front and rear by bending or twisting this bracket 146. The

lever

128, 134 is operated throu h the instrumentality of the wire 140 and this adjustment regulates the leverage of said wire on said lever.

An arm 148 consists of a piece of sheet metal secured by screws 150 to the upper face of the cross bar 55 of the universal bar frame. This arm extends rearwardly from the bar 55 and it has a part. 151 thereof bent up into a vertical plane and extending between the two

branches

128 and 134 and this vertical part 151 of the lever arm 148 has in it ahorizontal slot 152 inwhich the wire connector 14() lies. When a key is depressed and rocks the universal bar 52 the arm 148 is rocked upward, carrying the wire 140 with it and rockingthe pivoted

frame

128, 134 upward with theresult that the upper end ofthe arm 128 and with it the ribbon vibrator are moved toward the'. rear of the machine to carry the ribbon over the printing point. In this operation the wire 140 rocks upward at its left-hand end about its point of connection with the bracket 143 as a sort of pivot, the pivotalaction however being slight because the wire is rather long in a right and left-hand direction.

In Fig. 8 of the drawing the wire 140 is shown in full lines set for writing on the `lower or red stripe of the ribbon; or, in

other words, .it is set to give its'greatest throw to the vibrator; and said wire is shown in broken lines set to give a shorter throw to the vibratorv to write by theupper or black stripe of the ribbon. Saidl wire is slid longitudinally toward the left and toward the right to change from one of these 'settings to the other. When the wire is in the position shown in full lines in Fig. 8 it is the rear transverse section 145 thereof that passes through the slot 152 in the lever arm .148 and when the wire is shifted to the make the 148 and nearer to the axis 130 in the former case than in the latter sothat saidarin 148 adapted to impart a greater throw to the is wire in the rst instance than in the second.

`left for a shorter throw it is the forward Any suitable fixed stop can be provided to arrest the vibrator when writing from the lower stripe of the ribbon, but I prefer to fixture 132 at its right-hand end with av forwardly projectingstop yarm 153 which overlies the wire 140 at suchan elevation asto arrest said wire at the correct point for writing from `the lower or 4red justed up and down by bending it.y At' its left-hand end the x'ture 132 has a stop arm 154 projecting forward therefrom, this arm being bent first downward and thence rearward to makea stop for the free end of the wire 140 but in a lower plane than the stop 153, the stop 154 being adaptedto arrest the wire 140 at the correct position for writing from the upper or black stripe ofthe ribbon. This stop also can be adjusted up and down by bending it. Y l y f W'hen the wire 140'is set to impart the greatest throwto the vibrator, 'as shown in full lines in Fig. 8, the end of said wire does not reach to the stop 154 and when the universal bar is operated the `wire moves upward beyond` said stop, being arrested at that time by the right-hand stop 153.

The wire 140 can be shifted to the left or to the right in order to vary the extent'of throw of the ribbon vibrator, by a variety of means. As shown in the drawing, a bell crank 156 is pivoted at 157to fa fixed part of the machine consisting' of a bracket 158 projecting inward from the right-hand side plate 1 as shown in Fig. 4. One arm of said stripe ofthe ribbon. This stop can be adbell crank is bent upward at its endto form.,`

an ear`160 forked to embrace the rearwardly extendingjpart 141 of the wire 140.` The construction is such that when the ease shift key is operated the wire 140V moves bodily front and rear with the. shift frame,'slid ing at this time through the notch in the ear 160 without changing the position of said wire in a right and left-hand direction.` The bell crank `156 is operatedby a wire link 161, Fig. 1,- the front end of which is pivoted'in the lower end of a lever 162 having its upper end formed into a handle 163.. Said lever is pivoted at 164 in a bracket'165 consisting ofa piece of sheet metal. secured to the side plate 1,A the key or finger piece 163 occupying a convenient position at `the right-hand side of the key* board. lThebracket 165 has a shelff166 bent olf therefrom 4and .the lever 162 comes'up through a slot 167 Yin said shelf, said slot Vhaving one wall thereof made with a convex curve as shown in Fig. 7. The lever 162 is put under spring tension toward the left in Fig. 7 so that when moved to one end or the other of said slot 167 the convex wall of the slot acts to retain the lever in its position. Any suitable indices suchfor example as spots of color 168 can be put on the shelf 166 to guide the operator in adjusting the finger piece 163. In the present instance the rear index 168 might consist of a red spot and the forward one of a black Vor blue spot. y

The mode of operation of the differential mechanism between the arm 148 on the oscillator 55 and the lever 128 whichoperates the vibrator, is worthy of some discussion. In Fig. 10 the parts are shown at the end of a rkey depression when set for writing red. It will be understood that the extent of oscillation of the arm 148 is the same whether the connection'is set for red or black, but the extent of oscillation of the lever 128 is different in the two instances. In Fig. 1() it will be noted that the section 145 Vof the wire 140, which is embraced Aby the slot 152 in the arm 148, is pressed upward ata by the lower wall of the said slot 152 and that this'same section of the wirepresses upward at Z) on the upper wall of the slot 136 in the arm 128. The points a and b where the action of the arm 148 is transmitted to the arm 128 are relatively remote from the pivot 54 of the universal bar and relatively near to the pivot 130 of the arm 128 so that said arm is moved upward a greater distance than it would have been had the forward section of the wire been included in the slot 152. It will -be perceived that the'section 145 of the wire is pressed upward by the arm 148 at a, this sectionl presses the arm 128 upward at b, thus rocking the

whole frame

128, 134, and the prong "138 of the arm 134 presses upwardat c on the long section of the;` wire 140 and presses saidflongsection at-cl against the stop 153. It ywillvthus be seen that in this setting ofthe parts the

rock frame

128, 134

is operatedby the arm128 and is arrested byfthearm 134. `In the other setting of the mechanism, namely, when the wire v140 is moved to the dotted line position of Fig. 8, then itis the longsection of thewire 140 that is in the slot 152 and that is pressed upward by the arm148. This long'section; acts yon the prong137 of the arm 134to rock the frame. The section 145v of. the wire moves `upward until it, isarrested by the stop 154 vrand the `arm 128 moves upwardruntil the lower` wall of the slot 136 therein strikes against .the wire section .145,- thus positively arresting thezmotion ofthe frame. Itwill `be Iseen thatWhen'the parts are in the full line-,position .of Fig. 8 the frame 128,134V is rocked by the left-hand arm 128 thereof being located adjacent said left-hand arm 128. In either setting the connector 140 can rock about its longitudinal axis to a sufficienty extend to take up all lost motion in the various slots, etc., through which it passes. Though the amount of lost motion has been purposely exaggerated in Fig/10, the wireA is'loose; and yet its actlon 1s positive and exact, as will be seen in said figure by tracing the application of pressure at the points marked a, 5, c and al.

The upper wall of the slot 152 in

arm

148, 151, is not absolutely essential, or, in other words, the upper finger ofthe part 151 could be omitted. This finger, or upper wall of the slot is useful, however, and especially as it makes a positive connection between the vibrator and the arm 148 on the returnstroke of the parts. If said finger were omitted, a separate returning spring would have to be provided for the vibrator.

It will be noted that this mechanism is of extreme simplicity and cheapness Vand yet that its action is positive and certain. The

stops 153 and 154 can readily be adjusted `to arrest the vibrator at the right point in each instance. The leverage of the arm 148 on the connecting4 wire can very readily be adjusted to give the desired extent of motion by merely twisting the bracket 146 one way or the other. The proper relation of the arm 148 to the rest of the mechanism'can be regulated by bending said arm. 'Y

Thel vibratory ribbon guide, in addition to guide prongs or fingers 170'and `171 of ordinary construction, has a spring wire loop 172 soldered or otherwise secured to its underside, the two ends of said loop forming fingers 173 that overlie the lower half of the ribbon between prongs 170 to produce ribbon from bulging upward, as ithas atendvency to do, owingto the angle at which'the ribbonpasses through the vibrator.

The means herein described for feeding the ribbon longitudinally and the latch for preventing the ribbon spool from accidentally coming off of its post, are not claimed herein, but are claimed respectively in two divisional applications filed J an. 5,v 1921, Serial Numbers 435,221 and 435,222, the latter Yof which has matured into Patent No. 1,379,408, dated May 24, 1921. l* y Various changes can 'be made in the details vof construction and arrangement without departing from my invention.

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

*1, The combination with a ribbon vipasses, said ear'being adjustable by bending to adjust the wire slightly lengthwise of said rslot to regulatethe leverage between said lever arms.

2. The combination with a ribbon vi brator and a universal bar, of a lever arm connected with said vibrator, a second lever arm connected with said universalbar, a Vwire connecting said arms, the wire connector passing through a slot in one of said lever arms, and an ear on the last mentioned lever arm through which ear said connecting wire passes, said 'ear' being adjustable by bending to adjust the wire slightly lengthwise of said slot to regulate the leverage between said lever arms, and said wire connector being bent into two off-set sections at different distances from the axes of said lever arms and slidable lengthwise to bring one or the other of said sections into use at will and thereby to vary the throw of said vibrator.

3. The combinationy with a ribbon vibrator, and a universal bar, of a lever connected with said vibrator and having one arm thereof made with two branches spaced apart, a wire connector extending through both of said branches and being off-set between said branches, so that said connector passes through one ol?l said branches farther from the axis of the lever than it does through the other, a lever arm connected with said universal bar and lying between said branches and adapted to operate said connector, and means for effecting 'a relative adjustment of said connector and the last recited lever arm to cause said lever arm to cooperate with one section or the other of said connector.

4t. The combination with a ribbon vibrator and a universal bar, of two lever arms, the first connected with said vibrator and the second with said universal bar, a wire connecting said arms and bent .into two off-set sections and slidable lengthwise to bring one or the other of said sections into use to vary the leverage ratio, and a stop for arresting the shorter motion of the vibrator, said stop being so located that when the connector is adjusted longitudinally in the direction to give a short throw to the vibrator said connector comes into cooperative relation to said stop.

5. The combination with a ribbon vibrator and a universal bar, of a lever connected with said vibrator and having one arm thereof made with two branches; a second lever arm connected with said universal bar and lying between said two branches; a wire connector passing through said two branches .and operated by said second lever arm and being off-set between said vbranches and slidable lengthwise to bring one or the other section of the wire into coperation with the second mentioned lever arm,the construction being such that when the wire is in one of its two positions, said second lever' arm acts through said wire on one ot said branches to operate the vibrator and when said wire is in its other position said second lever arm acts through the other of said branches to operate the vibrator; and two stops, one in position to arrest said wire in one adjustment ofthe latter and the other being positioned to arrest said wire in its other adjustment.

6. The combination with a ribbon vibrator and a universalV bar, of a lever connected with said vibrator and having one arm thereof made with two branches spaced apart; a second lever arm connected with said universal bar and lying between said two branches; a wire connector passing through said branches and operated by said second lever arm, said connector `Ypassing through one of said branches remote from and through the other branch nearer to the axis of the rst recited lever and adjustable lengthwise to bring one orthe other of its o-set sections into position to be operated by the second mentioned lever arm; and two stops, one adjacent each of said branches, one of said stops acting to arrest said connector in one of the adjustments of the latter and the other stop acting to arrest said connector in its other adjustment.

7. The combination with a ribbon vibrator and a universal bar, of a lever connected with said vibrator; a lever arm connected with said universal bar; a wire connector extending through said lever and lever arm and having olf-set sections at diierent distances from the axis of said lever; and means for shifting said wire lengthwise, said means comprising a bell crank 156 to which the wire is connected, a link 161 extending to the front oi" the machine, and a hand lever 162, 163 for operating said link.

8. In a typewriting machine, the combination of a platen shittable for upper and lower case; a ribbon vibrator; a lever `for operating said vibrator, said lever mounted on the shift trame and shittable with the platen; a universal bar; a lever arm connected with said universal bar and also shittable with said shift frame; a wire connector between said lever and said lever arm adjustable lengthwise to vary the throw of the ribbon vibrator, said wire connector extending toward the side of the machine and bent to form a section 141 parallel with the direction of the motion of said shift trame and a section 142 parallel with the main body of the wire; a bracket 143 on the shift frame through which said section 142 passes; and a hand operated lever 156 having a slotted ear embracing the section 141 so as to move said wire connector lengthwise and to control it in every position of said shift frame.

9. rlhe combination with aribbon vibrator and a universal bar, of a lever arm connected with said vibrator, a second lever arm connected with said universal bar, and a wire connector between said lever arms, said connector being loosely supported at one end distant from said lever arnis and bent to form two olf-set sections and slidable lengthwise to bring one or the other of said sections into use, to vary the throw of said Vibrator. f

10. The combination with a. ribbon vibrator-and a universal bar, of a lever arm connected with said vibrator, a second lever arm connected with said universal bar, a wire connector between said lever arms, said connector being loosely supported at one end distant from said lever arms and bent to form two oli-set sections and slidable lengthwise to bring one or the other of said sections into use to vary the throw of said vibrator, and a stop adjacent one of said lever Yarnis and in position to arrest the other end of said connector in one of the adjustments of the latter.

Signed at Syracuse, in the county of Onondaga, and State ofNew York, this 24th day of February, A. D. 1920.

JOSEPHv B. HOLDEN.

Witnesses:

VERA E. HOUSE, MERTON C. MGLAUGHLIN.