US2225340A - Typewriting and like machine - Google Patents

Description

Dec. 17,1940. H. A. HEINRICH 2,225,340

TYPEWRITING AND LIKE MAcHIhE 5 Sheets-Sheet 1 Filed Nov. 22, 1938 Dec. 17, 1940. H. A. HEINRICH 2,225,340

TYPEWRITING AND LIKE MACHINE Filed Nov. 22, 1938 s Sheets-Sheet 2 Dec. 1940- H. A. HElNRlCH 2,225,340

v TYPEWRITING AND LIKE MACHINE I H 3 Sheets-Sheet 3 Filed Ndv. 22. 1938 carriage is released Patented Dec. 17, 1940 PATENT OFFICE 2,225,340 TYPEWRITING AND LIKE MACHINE Henry A. Heinrich,

to Remington Rand Inc.,

'poration of Delaware Middletown, Conn, assignor Buffalo, N. Y., a cor- Application November 22, 1938, Serial No. 241,838

Claims.

My invention relates to typewriting and like machines, and more particularly to ribbon feeding mechanism for such machines.

In many 'typewriting machines in which the ribbon feed mechanism is driven from the spring drum it has been customary in practice to effect a feed of the ribbon when the carriage receives a free movement in the direction of its feed, either by a tabulating operation or when the and is moved by hand in said direction. This results in comparatively long extents of feed of the ribbon when no impressions are being made and in the uneven use of the ribbon and consequently in relatively heavy impressions at certain points in the writlight imprints at other points Moreover, when the ribbon feed mechanism is employed to feed paper ribbons of the so-called carbon or "l-lectograph type where a single run only of the ribbon is effected, such long extents of feed of the ribbon result in a material waste of the ribbon. It also occasionally occurs that during such long extents of feed of a paper ribbon, the ribbon is torn apart due to the abrupt starting and/or stopping of the carriage.

It is one of the main purposes of the present invention to provide improved and highly effective means for overcoming the above mentioned difliculties by automatically rendering the ribbon feed mechanism inoperative during such free movements of the carriage, whether effected by the tabulator mechanism or by the release and positioning of the carriage manually. A further object of my invention is to provide means under control of the tabulator mechanism and under control of the carriage release mechanism for disengaging the one-way driving connection usually employed to afford feed of the ribbon during the travel of the carriage in a letter feed direction.

A still further object of my invention is to provide means of the character specified above in a machine of the type wherein the carriage release mechanism on the carriage operates to release the carriage by disengaging the feed rack from the feed pinion while the tabulating mechanism operates to release the carriage by disengaging the feed dog from the escapement wheel.

A still further object of my invention is to provide means of the character specified above wh ch may be readily embodied in a typewriting machine of standard construction without modi- Tying, or materially modifying the existing structure, and which is comparatively simple in construction, reliable and highly efficient in use.

To the above and other ends which will hereinafter appear, my invention consists of features of construction, arrangements of parts and ing and relative in the writing.

combinations of devices set forth in the following description and particularly pointed out in the appending claims.

In the accompanying drawings, wherein like reference characters designate corresponding parts with a different view:

Fig. l is a fragmentary transverse sectional view of a portion of a No. Remington Noiseless typewriting machine equipped with the devices of my invention.

Fig. 2 is an enlarged, fragmentary sectional view of a portion of the ribbon feeding mechanism, the view being taken on line 2-4 of Fig. 1 and viewed in the direction of the arrow at said line.

Fig. 3 is an enlarged, fragmentary, transverse sectional view taken on line 3-3 of Fig. 2 and viewed in the direction of the arrow at said line.

Fig. 4 is an enlarged, fragmentary sectional view taken on line 4-4 of Fig. 2 and viewed in the direction of the arrows at said line.

Fig. 5 is an enlarged, fragmentary view of a portion of the escapement mechanism, the view showing certain parts in section and other parts broken away.

I have shown my invention embodied in the present instance in a machine similar for all essential purposes to the standard No. 10 Remington Noiseless machine in which the features of the present invention may be readily incorporated with but few changes in the existing structure. However it is to be understood that my invention is not restricted to embodiment in such machine, but may be employed in various other types of typewriting and like machines wherever found available.

I have shown in the accompanying drawings only so much of the usual construction of the machine as is necessary to arrive at an understanding of my invention in its embodiment therein.

The distinctions of the machine shown herein over the standard No. 10 Remington Noiseless machine will be hereinafter referred to.

The frame of the present machine includes the usual side plates, the left hand side plate 8 being shown in Fig. 1. These side plates are connected by cross members, such as 9, shown in Figs. 1 and 2, and by rear end plate l0, shown in Fig. 2. The carriage, as shown in Fig. 2, includes the usual platen I plates, such as the right hand end plate I3, which end plates are secured at opposite ends to a main carriage supporting rail ll. Carriage is mounted for longitudinal letter space travel from side to side of the machine on'a case shiftable member or guide rail l5 by crossed antifriction rollers it received in oppositely disposed ways in said guide rail and companion ways in the carriage supporting rail ll.

2 mounted in carriage end The entire .carriageis mounted for substantially vertical case shifting movement by a case shifting rock shaft ll (Figs. 1 and 2) pivotally supported at its opposite ends to the machine frame. The lefthand pivot screw is for the shaft II, as shown in Fig. 1 is carried by an upstanding portion II of the machine frame. The

righthand end of the shaft is supported in a like manner. The rock shaft ll is pivotally connected at spaced intervals with the case shift guide rail II by means of arms I! as shown in Fig. 2. In this fi'gurethe righthand rock shaft arm 22 is shown pivotally connected at 23 to a depending lug 24 on the supporting rail II. The carriage receives a case shift movement by operation of the rock shaft ll through the usual key controlled case shifting mechanism, which has not been shown in the drawings.

The carriage is impelled in a letter feed direction by a spring drum of the usual construction which is shown in detail in Fig.2. The spring drum is a hollow construction formed by a cup shaped member 2| and a disc 2| assembled at opposite sides of a centrally disposed enlarged diameter portion of a spindle 34. The spindle ill is mounted at a still further reduced diameter rear end portion which passes through an opening in a U-shaped bracket II carried by the cross member I in the usual manner. The hollow interior portion of the spring drum houses a spiral spring 32 which is connected at its inner end at 34 to the spindle 30, and the outer end of the spring I2 is connected at 34 to the cup-shaped member 28 of the spring drum. The usual means are provided for adjusting the tension of the spring 32 by turning the spindle 30, which means includes a pivoted anchor escapement member 38 coasting with a tooth wheel ll, fixedly mounted on the spindle II. A nut II is threaded on the rearward end of the spindle 30 for locking at the adjusted position thereof.

A pull band 40 of the usual construction is wound around the spring drum between flanges formed thereon by a ring 4i secured to the sides of the cup shaped member 28 and a similar ring 42 secured at the opposite disc 29. One end of the pull band 4| is secured in. the usual manner to the spring drum and the opposite end is connected at 40" to the right hand carriage end plate IS.

The latter space movement of the carriage under the force of the spring I! is controlled by the usual escapement mechanism which includes a feed rack 45 carried by pivotally mounted brackets, such as the bracket 48 shown in Fig. 2, which is pivotally mounted at 41 to the carriage guide rail l4 in the usual manner. As may be seen in Fig. 1, the feed rack 45 coacts with a feed pinion 43 carried at the upper endof a substantially vertical disposed feed shaft 44. The lower end of the feed shaft 44 is operatively connected in the usual manner to a tooth escapement wheel 44 which is rotatively mounted in a fixed bracket 49 secured at ill to the cross member 9.

The usual feed dog mechanism coacts with the escapement wheel 48 to afford a one-tooth movement thereof during a printing operation of each type action. Referring to Fig. 5, it may be seen horizontal pivotal axis (not shown) and is connectedintheusualmannerforaotuation during theprintingoperationofeaehtypeactiontodis engage the holding doglI fromtheteeth'of the escapement wheel 44: and to move the stepping 6 dog It intothepathiofantooth.

The usual mechanism for releasing the carriage from control of the escapement mechanism to afford a free movement of the carriage in a letter space direction is likewise provided in the present machine. This release mechanism includes the usual carriage release lever mounted at each. end of the carriage, as indicated by the righthand lever II, shown in Fig. 1 and Fig. 2. The lever 48 is pivoted at 40 to the 15 carriage end plate It and is connected by alink II to the companion feed rack bracket 4|. An operation of 16108111888 release lever ll rocks the bracket 4 about the pivot 41 to lift the feed rack 48 out of mesh with the feed pinion 43 and 20 allows the carriage to bemoved freely in either direction. A contractile spring ii is provided between the rearward end of the link ll and a fixed member on the carriage to return the feed rack to normal position.

The usual tabulator mechanism provided in the present machine also includes a means for controlling the escapement mechanism to aflord a free run of the carriage in a letterspace direction for tabulating purposes. The tabulator mechanism includes the usual tabulator key or bar at the keyboard of the machine and supported on the forward end of levers pivotally mounted intermediate of the machine but the showing of which has been omitted from the 85 drawings. It is. to be understood however, that such tabulator key, etc.. is or may be of the usual construction and is arranged to afl'ord an upward movement of a rearwardiy extending tabulator arm ll attached upon a depression of the 40 tabulating her. As may be seen in Fig. 2, the rear end of the arm I! engages the lower end of an upwardly extending link ti which is guided at its lower end portion by a guide comb I, and is connected at its upper end, at 4|. to a tabu- 45 later stop member I! which is pivotally mounted at III in the usual tabulator frame. The carriage is or may be provided with the usual column stop constructicm which includes a bar I! slotted at letter space intervals and mounted beneath a transverse bar I4 which is attached at 15 to each of the carriage end plates II. A tabulator stop It is provided in each of the slots of the bar 13, which stops are arranged in the usual manner to be moved rearwardly to an effective 55 position by a keyset tabulator stop mechanism, which has not been shown. Thus. the upper forward end of the tabulator stop member 44 may be operated to a forward position by a depression of the tabulator bar to coact with a column so stop 16 which has been moved to its rearward effective position and arrestmovement of the. carriage in a letter space direction. In order to afford a movement of the carriage in a letter space direction upon a depression of 65 the tabulator bar, the usual mechanism is provided for disengagingthe holding dog 52 from the teeth of the escapement wheel 48. Thus, as may be seen in Fig. 2, this tabulator release mechanism includes an upwardly extending arm ll 70 pivotally mounted at I! on a bracket II which is attached to the frame cross member I, at 50.

. The arm is provided with a rearward extenport of said spindle.

2.22aa4o 3 seen in Fig. 5, the upper portion of the arm I8 coacts with the tail portion of the holding dog 52. Therefore at each operation of the tabulator mechanism, the upward movement of the link 66 rocks the arm 18 above its pivot 19 which in turn effects a pivotal movement of theholding dog 52 about its pivot 54 against the force of a spring 82. Thus, the engaging end of the dog 52 is withdrawn from the teeth of the escapement wheel 48 and the carriage is permitted to move in a letter space direction under the force of the. spring 32.

The parts of the machine thus far described may be the same in every respect to those provided in the standard No. 10 Remington Noiseless machine.

In the No. 10 Remington Noiseless machine, means are provided for feeding the ribbon longitudinally during a movement of the carriage in a letter space direction. The specific ribbon feed mechanism embodied in such machine includes intermediate driving connection between the ribbon spools and the spring drum together with a one-way clutch arranged to-tinn the active ribbon spool only during a rotation of the spring drum in a direction affording movement of the carriage in a letter feed direction, and which enables the carriage to be returned without turning the spool.

Before describing this one-way clutch mechanism in detail, the other parts of the present ribbon feed mechanism will be described with reference to Fig. 2. A shaft 90 is mounted in axial alignment with the spindle 30 of the spring drum, which. shaft is mounted .in bearings in a forward extension M :of the U-shaped bearing member 3|, the member 9| being secured at 92 to the cross member 9 of the machine frame. The rear end of the shaft 90 enters a bearing opening 93 in the forward enlarged portion of the spindle 30 to thereby contribute to the sup- Referring to Fig. 1, it may be seen that the forward end of the shaft 90 carries a comparatively large gear 95 which meshes with a smaller gear 96 fixed to a short shaft 91. The shaft 91 is rotatively mountedin parallel relation to the shaft 90 by a bearing provided in the cross member 9 of the machine frame. The forward end of the shaft 91 carries a crown gear 98 fixed thereto, which crown gear meshes with a pinion gear 99 fixed on a transverse by extending .reversing shaft I00. The shaft I extends through a bearing opening in each of the side plates 8, and each outer end portion thereof carries a small bevel gear, such as the bevel gear I02 shown in Fig. 1.

The transverse shaft I00 in the present machine may be shifted longitudinally to bring either one or the other of the two bevelled gears I02 into meshed relationship with a companion bevel gear mounted at the lower end of associated vertical ribbon spool shaft I04. Thus, at theposition of the shaft I00 shown in Fig. 1, the bevel gear I02 meshes with a larger bevelled gear I03 fixed to the lower end of a vertical shaft I04 rotatively mounted in a U-shaped bracket I05 secured at I08 to a side plate 8. The upper end of each of the spool shafts I04 carries a ribbon spool, which, as may be seen in Fig. 1, includes a lower flange I08 and an upper removable flange I09 carrying a finger piece 0-. The ribbon H2 in the present instance is wound around a removable core (not shown) mountedbetween the flanges I08 and I09 to turn theredrive shaft 90.

with. The ribbon "2 extends from one spool to the other transversely of the machine and passes through a ribbon vibrator II3 which may be of the usual construction'adapted toeleva'te the ribbon in front of the printing point at each operation of a type action A housing II4 may be attached at II5 to each side plate 8 .of the machine to enclose the projecting end of the shaft I00 and the lower portion of the vertical shaft I04.

The specific mechanism shown in Fig. l is particularly adapted to the feeding of a carbon paper ribbon, wherein it is desirable to carry a large supply of the ribbon on either of the two spools, and wherein it is desirable to effect an extent of longitudinal feed movement of the ribbon which slightly exceeds a normal letter space distance. However, the devices of' the present invention may equally well be applied to the specific ribbon feeding mechanism adapted to feed a ribbon of the conventional fabric construction wherein a lesser extent of longitudinal feed movement is ordinarily effected and a smaller supply of such ribbon is provided on either of the two spools. Such a construction for fee-ding a fabric ribbon is ordinarily provided in the standard No. 10 Remington Noiseless machine wherein spool shafts, such as the shaft I04 in Fig. 1, are located within the side plates 8, and the pinion gear 99 is driven directly by a crown gear mounted at the forward end of the shaft 90. An automatic ribbon reversing mechanism has not been shown in the present drawing, but such mechanism may of course be provided if desired.

As previously mentioned, the intermediate driving connections between the spring drum and the ribbon spools includes a one-way clutch, and in the present instance, this one-way clutch is a pawl and ratchet mechanism employed to operatively connect the spring drum with the This clutch construction is shown particularly in Fig. 2 andFig. 4, wherein it will be seen that a collar I20 having a tooth portion I2I at the rear end thereof is secured by a screw I22 to the rear portion of the shaft 90 adjacent the spring drum. As will be seen in Fig. 4, the ratchet teeth I2I coact with clutch pawls I23 and I24 which are pivotally mounted at I25 and I26 respectively on the front surface of the spring drum member 28. Each of the pawls I23 and I24 is provided with an inwardly extending lug near its pivotal support, which lug enters an associated end of a coiled expansion spring I21. A portion of the spring I21 enters an opening I28 in the spring drum member 28.

The free end of each of the pawls I23 and I24 is shaped to enter an interdental space of the teeth I2I and is normally held in such positionby the force of the spring I21. This construction operates to drive the shaft 90 in a clockwise direction as viewed in Fig. 4, by a rotation' of the spring drum in a clockwise direction. This clockwise direction of rotation of the spring drum occurs during the movement of the carriage in the direction of the feed. However, during a return direction of'movement of the carriage, the spring drum rotates in a counterclockwise direction, and the pawls I23 and are cammed outwardly by the teeth t0 ratchet thereover without driving the shaft 90.

A holding means is provided for preventing a reverse direction of.rotation of the shaft 90 which is shown particularly in Fig. 2 and Fig. 3.

pivotally mounted at I35 and I35 respectively on.

a stationary bracket I31. I The bracket I31 is provided with an opening receiving the shaft 35. and the bracket may be secured to the bearing block 3|, at I33.u The holding pawls I33 and I34 are generally similar to the clutchpawls I23 and I24, and may be spring pressed intheir normal position to coact with the ratchet teeth I3I by a spring I33, a portion of which spring enters an opening I45 provided in the bracket I31. The free engaging ends of the pawls I33 and I34 coact with the ratchet teeth I3I in the usual manner to prevent counter-clockwise ro tation of the shaft 35 as viewed in Fig. 3, but to aiiord clockwise movement thereof.

A means is provided in accordance with the present invention for preventing unnecessary and undesirable feeding of the ribbon such as ordinarily occurs during carriage movements afforded by a depressionof the carriage release key or an operation of the tabulating mechanism. This result is accomplished in the present instance by means under control of the carriage release key .53 and the tabulator mechanism for disengaging the two pawls I23 and I24 from their normal cooperative relation with the ratchet teeth I2I and thereby disconnecting the spring drum from the ribbon spooldrive shaft 55.

The specific means shown in the accompanying drawings for obtaining this result includes a throw-out or disconnect member or collar I 45 mounted around the collars I and I33. An opening I45 is provided in the collar I45 which permits access to the screws I22 and I32 inorder to assemble the parts on the shaft 53. The throw-out member or collar I45 is arranged for longitudinal sliding movement on the collars I25 and I35, and the rear end portion, of the collar I45 is bevelled at I45 to form a circular cam surface coacting, with pins I41 and I43 (see Fig. 4) extending forwardly from the free ends of the pawls I23 and I24 respectively. Thus, when the collar I45 is moved rearwardly from its illustrated position in Fig. 2, along the axis of the shaft 55, the bevelled rearwardend I45- of the collar coacts with the rounded front ends of the pins I41 and l45to force the free engaging ends of the pawls I 23 and I24 out of the path of the ratchet teeth I2I, thereby disengaging the spring drum from the shaft 35. The spring I21 acting on the pawls I23 and I 24 exerts a suflicient inward force on the pins I41 and I43 to normally hold the collar I45 in its forward position shown in Fig. 2.

In accordance with my present invention a rearward movement of the collar I45 to disconnect the spring drum from the shaft 93 may be effected in one instance upon a release of the carriage by operating either of the carriage release keys 58. The mechanism for aflording this I result includes a plate member I55 (Fig. 2) having laterally extending ear portions I50 which enter openings in spaced upwardly extending arms of a bracket member I5i which is attached at I52 to the front face of the case shift guide rail IS. The plate member I5II is thus pivotally supported in front of the feed rack 45, and a laterally offset portion I50 of the plate member overlies the feed rack,-as shown in Fig. 2.

An arm I52 depends from the plate member I55, and the lower end of the arm is pivotally connected to the forward end of a link or push rod I54. A threaded rearward portion of the push rod I54 is provided with a sleeve I55 which is held thereon bynuts I53 and washers I51.

as may be seen in Fig.3,the sleeve I55 on the the lower end portion on a headed pin secured to the bracket I31. The opening in the lower end of the arm I55 which receives the body portion of the pin III is sub nciently largeto-afi'ord a fore and aft pivotal movement of the arm I53, and an opening III is provided in the arm I53 which receives the head of the screw-|33 employed to mount the bracket I31, thereby maintainingrthe arm I55 in its upright position. I

As shown in Fig. 2 1m edge of the arm I53 passes in front of a flange I45 at the front end of the collar I45, and accordingly 1 rearward pivotal movement of the arm I55. about the pin I53 will effect a rearward movement of the collar I 45 to disconnect the spring drain from the shaft 55. It maybe seen that the washers I51 provide an operative connection between the push rod I54 and I53 after the lost motion between said washers and arm has been taken up. Thus, whenthe feed rack 45 is rocked about the pivot 41 by anoperation of the carriage release key. the plate member I55 is rocked upwardly to effect a rearward movement of the lower end of the arm I52 and effect a rearward pivotal movement of the arm I53 through the push rod I54 to disconnect the spring drum from the drive shaft 5|.Therefore there will be no feed. of the ribbon riage at this time.

It will be noted that the plate member I55 is mounted tion of the parts connected thereby at either-case shift position of thecarriage.

In accordance with the present invention a rearward release movement of the collar I45 may also be effected in another instance upon the release of the carriage by operatingthe tabulator mechanism. The mechanismfor aflording 'this result includes atransverse bar I55 pivotally mounted at I55 to a fixed bracket I51 shown in Fig. 1. Thebracket I51 may be retained at I53 upon the guide comb 51 so that the inter mediate portion of the bar I55 overlies the rearward end of the arm 3I- which is operated upwardly by an operation of the tabulator actuatme link 55. h

The free end of the bar. I55 is curved upwardly, as shown in Fig.8, so that the extreme upper end thereof is positioned in front of the flange I45 of the collar I45. A wedge shaped cam member I15 is securedto this upper end portion of the bar I55 to coact with the bevelled front edge portion of the flange I45". A contractile spring I12 extends between the intermediate por-'- tion of the bar I55 and a fixed member I13 of the machine frame to return said bar to and resiliently hold it in a normal position, Thus, upon an operation of the tabulator mechanism to release the carriage for free movement in a letter space direction, the bar I65 is operated upwardly about its pivot I66 simultaneously with the arm 8| which operates to release the holding dog of the escapement mechanism, as previously described. Referring to Fig. 2, it may be seen that this upward movement of the free end of the arm I65 operates through the cam member III) on the bevelled edge I45 of the collar I45 to effect a rearward movement thereof and thereby disconnect the spring drum from the shaft 90. So, therefore, there is no feed of the ribbon during the tabulating operation.

When a column selecting tabulator mechanism, or a denominational tabulator mechanism is incorporated in the present machine, there will be provided a plurality of key operating means and a plurality of frame'stops connected thereto by links such as the link 66 shown in the present arrangement. In such a column selecting or denominational tabulating mechanism, it will be clear that the arm BI will be arranged to throw out the holding dog 52 and release the carriage upon an operation of any one of the plurality of tabulator keys, and accordingly the bar I65 of the present mechanism also will be operated to shaft 90 keys.

It will be seen that I have thus provided an improved, highly efficient and reliable means for preventing unnecessary and unwarranted longitudinal feed of the ribbon in a typewriting machine during any free movement of the carriage in a letter space direction, In other words, I have provided an improved means under control of the carriage release keys and the tabulator mechanism for rendering the ribbon feed mechanism inoperative. In the present machine, the release keys mounted on the carriage operate to afford a free movement of the carriage in a letter space direction by releasing the feed rack from the feed pinion, while the tabulator mechanism operates to release the carriage by disengaging the holding dog from the teeth of the escapement wheel, and. accordingly I have provided automatically operating means for rendering the ribbon feed mechanism inoperativawhich means are controlled from each of two separate operating mechanisms of the machine.

A further feature of the present invention which adds to the simplicity of the structure is the utilization of the one-way driving connection or clutch between the spring drum and the ribbon drive shaft as a disconnecting means in the ribbon feeding mechanism. In other words, I have provided means under control of the carriage release keys and the tabulating mechanism for disengaging the usual pawl and ratchet connections employed as a one-way drive or clutch between the spring drum and the ribbon feeding mechanism.

'It will be understood, moreover, that the devices of my present invention may be readily incorporated in existing machines without modifying, or materially modifying, the existing structural features thereof.

Various changes may be made in the construction, and certain features thereof may be omitted, without departing from my in ention as it is defined in the accompanying claims.

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

1. In a typewriting machine, the combination of a carriage having a case shifting movement, carriage releasing means mounted for case shifting movement with the carriage, ribbon feeding mechanism mounted on the frame of the machine, and means controlled by said carriage releasing means for rendering said ribbon feeding mechanism inoperative regardless of the case shifted position of the carriage.

2. In a typewriting machine, the combination of a carriage having both a letter feed movement and a case shifting movement, carriage releasing means mounted on the carriage for movement therewith, ribbon feeding mechanism mounted on the frame of the machine, including a clutch for interrupting the feed of the ribbon, a control member mounted for case shifting movement only with the carriage and operative by said carriage releasing means, and connecting means for operating said clutch by said control member to interrupt the feed of the ribbon regardless of the case shifted position of the control member.

3. In a typewriting machine, the combination of a carriage having both a letter feed movement and a case shifting movement, carriage releasing means mounted on the carriage for movement therewith, mounted on the ing a clutch for ribbon, a control member mounted for case shifting movement only with the carriage and onerative by said carriage releasing means, and connecting means for operating said clutch by said control member to interrupt the feed of the ribbon regardless of the case shifted position of the control member, said connecting means including a link extending transversely of the direction of case shift movement of the carriage.

4. In a typewriting machine, the combination of a carriage having a case shifting movement relative to the frame of themachine, carriage releasing means mounted for case shifting movement with the carriage, ribbon feeding mechanism mounted on the frame of the machine including a clutch for interrupting the feed of the ribbon, and controlling means for said clutch operative by said carriage releasing means to interrupt the feed of the ribbon regardless of the case shifted position of the carriage, said controlling means including a link which is moved by the case shifting movement -of the carriage substantially equal distances each side of a central position wherein it aligns at right angla to the direction of case shifting movement of the-carriage.

5. In a typewriting machine, the combination of a carriage, a spring drum therefor, a ribbon feed shaft mounted in a fixed bearing member, clutch means for at times operatively connecting said ribbon feed shaft to said spring drum, a controlling member for said clutch means mounted for axial movement on said feed shaft, key controlled tabulator mechanism, a pivoted arm operated by said tabulator mechanism, and a wedge-shaped member carried by said pivoted arm and operative between said bearing member for the ribbon feed shaft and said controlling member to move the controlling member axially on the feed shaft and disconnect said clutch means.

v HENRY A. HEINRICH.

ribbon feeding mechanism

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