US2185742A - Typewriting machine - Google Patents

Description

1940- R. G. THOMPSQN 2,185,742

TYPEWRITING imcamE Filed April 1, 1937 2 Sheets-Sheet 1 nun-"MHZ Jun-11mm INVENTOR RUSSELL GJHOMPSON ATTORNEY Jan. 2, 1940. R G, THOMPSON 2,185,742

TYPEWRITING MACHINE Filed April 1. 1931 2 Sheets-Sheet 2 INVENTOR RUSSELL GTHOMPSON BY/{ sg g" TTORNEY Patented Jan. 2, 1940 UNITED STATES TYPEWRITING MACHINE Russell G. Thompson, West Hartford, Conn, as-

signor to Underwood Elliott Fisher Company. New York, N. Y., a corporation of Delaware Application April 1, 1937, Serial No. 134,324

11 Claim.

This invention relates to typewriting and book. keeping-machines and with regard to certain more specific features thereof to denominational tabulator mechanism adapted to be power-actuated in such machines.

In U. S. patents to McLaughlin 956,144 and Helmond 1,858 denominational tabulators are shown in which a row of keys are adapted for selective depression of spring-pressed levers which in turn move denominational reeds or blades at the rear of the machine into-position to engage column or carriage stops set on a carriage rack. Provision is also made for releasing the carriage from its escapement when a key is depressed so that the carriage may be moved by its spring or other motor means until a set stop on the carriage engages a denominational-tabu- Qlator stop which has been moved to stop position.

The present invention employs keys, levers and go reeds or blades of the same general type shown in these patents but provides for the selective movement of the reeds or blades to stop position by power from an electric motor or similar prime mover and also provides for their restoration 5 automatically at the end of the tabulating movement. The invention further provides for the restoration of any set stop by means coming into operation at the line-end or prior to carriage return so that no blade is in position to interfere 30 with the return of the carriage. I

The invention has, therefore, as one of its objects, to provide a simple, inexpensive and reliably operative device for power-actuating a plurality of denominational-tabulator stops.

35 Another object is to provide a simple latching.

mechanism for the stops which permits them to be unlatched by collision of the carriage in its tabulating travel.

Still another object is to provide a reliably 40 operative device for clearing all stops from the return path of the carriage.

Other objects will be in part obvious and in part pointed out particularly as the description of this invention proceeds.

45 In the accompanying drawings wherein is shown one of various possible embodiments of the invention:

- Fig. 1 is a view in side elevation, with side wall broken away in part, of a typewriting machine 50 embodying the invention.

Fig. 2 is a view in perspective showing the denominational-tabulator mechanism shown in Fig. 1.

Fig. 3 is a view in perspective of a part of the 55 escapement control.

Fig. 4 is a view in perspective of a part of the clearing device for the denominational-tabulator s ops.

Fig. 5 is a view in perspective of the operating mechanism for the tabulator stop clearing device 5 shown in Fig. 4.

Referring now more in detail to the drawings, a typewriting machine frame is indicated generally at made up of left and right side walls 2| and 22 connected at the rear by a plate 23 and 10 at the front by the usual front bar, not shown, and-an anchor bar 24. About midway between the front and rear of the machine the two side walls are connected by a backbone 25 and cross bars 26 and 21. A comb-slotted plate 29 is con- 15 nected at one end to-a rib 30 projecting inwardly from the side wall 2| near the front of the machine and has its other end connected to a similar rib extending inwardly from the side wall 22.

As shown clearly in Fig. 2 of the drawings, a go plurality of key levers 3| are positioned for guidance in slots 32 in the plate 29. One of these levers 33 is for the purpose of setting the desired column or carriage stops as will be more fully described later, and another one of the g5 levers 34 has as its purpose the clearing of any set column or carriage stops as will be described later. The other levers 35 are the various denominational key levers having keys 36 and these levers are suitably bent at the rear of the comb 30 plate 29 so that beyond the plate they are grouped substantially at the center of the machine in slots 31 in a flange 38 of the backbone 25. A fulcrum pin 40 passes through the flange of the backbone and through all of the levers 33, 34 and 35. The 35 comb plate 29 has a short rearwardly extending flange 4| provided with flngers 42 to which are attached ends of individual pull strings 43, the opposite ends of which are attached to hooks 44 formed on the levers 33, 34 and 35. These springs 4g serve to hold the key levers normally up in the comb slots 32 with their hook portions 44 hearing against a resilient stop member 45 suitably secured to the rear of comb plate 29 in position to present the engaging part of resilient member 45 45 suitably below the top of the comb slots. It will be understood that the various character keylevers of the typewriter are also pivoted by pin 40 in flange 38 of the backbone. Some of these key levers are indicated in Fig. 2 at 46 as between 50 the grouped denominational-tabulator levers and others are arranged in the backbone on opposite sides of the group.

The "Tab-set lever 33 has an extension 41 rearwardly beyond the fulcrum pin 40. This extension is joined by a connector 48 to a lever 49 pivoted on the cross bar 21 at 50 and extending parallel to the bar. An opposite end 5| of this lever is connected by a link 52 to one end of a lever 53 pivoted on a shaft 54 which is journaled in arms 55 projecting forwardly from the rear plate 23 of the machine. The other end of lever 53 enters a slot 56 in the lower end of a magazine 51 which latter is suitably secured to the frame of the machine in an aperture 58 in back plate 23.

The slot 56 of magazine 51 also receives the lower end 60 of an angle member 6| which rises in the magazine, turns forwardly andterminates in an enlarged end 62 positioned in a slot 63 of a universal plate 64 the construction and operation of which will be described later. The function of the universal plate 64 insofar as the angle member 6I is concerned is merely to provide a guide for the upper end of the member 6| in an upward and forward direction of movement. A pin 65 passes across the magazine and is suitably secured therein. The angle member 6| has cam slot 66 through which pin 65 passes. The enlarged end 62 of member 6| is pivotally connected at 61 to a bail-shaped member 68 shown in Figs. 1 and 2 of the drawings by dot-and-dash lines. Thisbail-shaped member comprises an arm 10 extending from pivot connection 61 to a pivotal bearing on a shaft 1| which latter extends across the magazine and is suitably journaled in ears one of which is shown at 12 in Fig. 2. The arm 10 passes suitably beyond its journal on the shaft 1 I, then turns and extends parallel with the shaft and emerges, at the other side of the magazine, with a setting finger 13 .having at this point another pivotal mounting on shaft 1 I.

The angle member 6| having its lower end above the end of the lever 53 in slot 56 is adapted to be elevated whenever the Tab-set lever 33 is depressed. Its elevation is permitted by cam slot 66 and forward movement must necessarily take place owing to the connection with ballshaped member 68 pivoted on shaft 1 I. Elevation of the member 6|, therefore, rocks the bailshaped member 68 and moves the setting finger 13 rearwardly. Thus any one of a multiplicity of carriage or column stops which is in line with the setting finger may be moved rearwardly in a stop-carrying bar 8| extending lengthwise of the carriage. The bar is secured in arms 82 at opposite ends of the carriage.

A conventional typewriter is indicated in Fig. 1 at 83 having a carriage rail 84 mounted on antifriction rollers 85 in a track 86 which in turn is pivotally supported upon a balancing or caserhift frame 81 permitting case-shifting movements of the carriage. The carriage is equipped with a rack 88 which is in fixed relation with its rail 84 and the teeth of which engage a pinion 90 at the upper end of a shaft 9|. The latter is supported for rotation in a bracket 92 secured to the forward side of carriage track 86. A centertie 93 is considered for the purpose of this case as a frame part although adapted for slight fore and aft adjustment on the frame and the center tie is apertured at 94 to receive the shaft 9| which has a lower bearing in a bracket arm 95. A carriage escapement wheel 96 is fixed on the lower end of shaft 9| and is under control of dogs 91 and 98 mounted on a rocker frame I00 adapted to be rocked on the pivots IOI and I02 (see Fig. 3) to alternately engage the dogs 91 and 98 with teeth I03 of the escapement wheel 96.

The carriage 83 is under the usual tension for operating in a letter-feed direction either by the conventional spring motor and tape connection or by other motor means. The letter-feeding movement of the carriage is controlled by the rocking of frame I00 and the dogs are disengaged from the escapement wheel 96 for tabulating operation, all as will be particularly described later herein.

For the purpose of restoring the column stops 80, which have been set into stop position by operation of the "Tab-set key and the finger 13 the Tab-clear key lever 34 is provided. Depression of the Tab-clear" key raises the rear end of lever 34 which is joined by a connector I04 to one end of a lever I05, which is pivoted by a stud on bar 21 in the same manner as the lever 49 of the Tab-set mechanism. The other end of lever. I05 connects with a lever I06 pivoted on shaft 54 and having its opposite end in one of the slots 56 in the lower end of magazine 51. This slot is at the extreme left of the magazine, as viewed in Fig. 2, and it receives the lower end of a reed or blade I 01 which extends upwardly in the magazine and is guided in one of a plurality of slots I08 cut in a cross bar I09 extending across the upper mouth of the magazine and suitably secured thereto.

At the top of the magazine a plate I I0 is secured at an inclination upwardly and forwardly from the rear of the magazine. This plate is provided with a plurality of slots III cut parallel to the face of the plate and therefore extending at an upward angle from the rear of the magazine. The reed or blade I01 has at its lower end a slot similar to the inclined slot 66 in angle member 6| and its upper end is inclined to fit one of the slots III in plate N0 of the magazine.

Thus it will be seen that raising of the rear end of lever I06 by depression of the Tab-clear key will elevate the reed I01 in the magazine and its inclined top end plus its pin and cam slot connection will cause it to be urged forwardly. The upper end of this reed is provided with a lateral extension having a cam face I I2 receding toward the left of the machine and when the reed is set into stop position, as described, a return of the carriage by hand or by power from its carriage return position at the right of the machine will cause the cam face II2 to engage all of the set carriage stops 80 in its travel and return them forwardly to normal positions of disengagement.

The described means of setting the carriage stops and the clearing of the same by the manual depression of keys are not claimed in themselves as any part of the present invention except as these mechanisms enter into combination with the devices which will now be described to carry out in completeness the function of a denominational tabulator for a power-driven machine.

In the preferred form of this invention shown in the accompanying drawings and described herein, a constantly rotating prime mover or driving member is shown. It is not intended to limit the invention as to its power operation to a constantly operating or rotating prime mover as it is conceivable that the invention in many of its broader aspects is applicable to a motor means which may be intermittently energized or brought into operation by the depression of any of the denominational-tabulator keys or some other key or switch, or possibly automatically energized or coupled upon the completion or during the progress of some other operation of the machine. In the form shown the prime mover is a rotating toothed shaft I20 constantly driven from a source of power such as an electric motor (not shown). Teeth In of this rotating shaft are adapted to engage teeth I22 of a pawl I23 pivotally connected at I24 to a vertically movable driven member I25. This driven member is provided with a slot I26 at its upper and through which a pin I21 passes, and this pin may pass entirely across the machine in a rearwardly extending flange I of the backbone 25. The pin may serve as a guide or fulcrum for a multiplicity of similar driven members or actuators for..the power operation of the type-bars, the carriagereturn, case-shift, back-spacer and any other function that it is desired to form by power. To this end the flange I28 of the backbone is combslotted and each actuator, as is the case with actuator I25, is guided in one of the slots. The actuator or driven member I extends downwardly in the rear of a lower flange I30 of backbone 25 and a plate I3I secured to the under side of the flange and has a diagonal leg I32 forwardly extending and provided with a hook I33. This hook is connected by a spring I34 to the plate I3I which tends to hold the member I25 forwardly away from the drive roller, as shown clearly in Fig. 1 of the drawings.

When, however, the member I25 is swung rearwardly around the pin I21, teeth I22 of pawl I23 are engaged by the teeth of the roller I20 and the assembly of actuator and pawl is moved downwardly, slot I26 riding along pin I21. A notch I35 in the upper part of the driven member receives the rounded end II5 of an arm II6 which has its other end II1 secured to the end of shaft 54. Thus the shaft 54 is rocked in the direction of the arrow (Fig. 2) and carries with it spaced arms I I9 and I I9 suitably secured to the shaft. The ends of these spaced arms are connected by a rod I29.

When the driven member I25 is picked up by the roller I20 and moved downwardly this movement continues until a cam edge I engages a rounded head of an adjustable knock-off screw I4I secured in cross bar 26. Further continued downward movement causes the driven member I25 to be urged forwardly until pawl I23 is disengaged from the roller whereupon spring I34 restores the driven member to its normal position shown clearly in Fig. 1 of the drawings. Thus the rod I29 is oscillated each time the pawl I23 is engaged with roller I20. The mechanism just described is a common actuator for all of the denominational-tabulator stop-blades. These stop-blades, indicated at I42, are in the preferred form shown ten in number and of similar configuration to the reed or blade I01 except that they do not have the lateral extensions I I2. Each has its lower end in one of the slots 56 at the bottom of the magazine 51 and its-upper end in one of the slots III of the plate IIO. Each reed or blade I 42 has a slot corresponding to the slot 66 of angle member 6|, so that as any blade or reed I42 is lifted from the bottom it will rise and move forwardly in the magazine into a position to intercept any set carriage stop 80. For raising the blades I42 a series of levers I 43 are grouped centrally of the machine between levers 53 and I06 and the levers I43 are individually pivotally mounted on shaft 54. Each lever I43 has its forward end pivotally connected with a swingable coupler in the form of an arm I44 having a hook on its lower end as indicated at I45. Each arm I44 is held normally with its hook I45 out of engagement with the rod or bar I29, by a connector I46 extending from one arm of a bell-crank-lever I41. These levers are mounted in a comb-slotted flange I31 of cross bar 21 on a pivot pin I30 passing through the flange. The other arm of each lever I41 is joined by a connector I40 respectively with one end I49 of each denominational-tabulator-stop key-lever 35. As heretofore described, each of the latter have their key-ends held upwardly against stops by springs 43, and thus, through the connections just described, the arms I44 are normally held rearwardly to an extentpermitting oscillation of rod I29 without engaging any of the hooks I45. When any one of the denominational-stop-lever keys is depressed its connected bellcrank-lever I41 is rocked to swing its particular connected coupler arm I44 forwardly. and position the hook I45 thereof below bar I29. If the bar is then oscillated it will move the selected coupler I44 downwardly rocking its connected lever I43 on shaft 54 thus elevating the rear end of the lever and elevating the blade I42 positioned in the same slot 56 in the magazine. Depression of a particular den0minational-tabulator-stop keylever 35 not only moves a particular coupler I44 into coupling relation with the actuating mecha nism including the rod I29, but also by means of hook 44 rocks a universal bar I50 which is common to all the levers 35 and institutes the operation of the actuating mechanism, as will now be described.

The universal bar I50 underlies all the hooks 44 of levers 35. It is fixed 6n a shaft I5I journaled in the opposite side walls of the machine. At the right side of'the machine the shaft has a fixed arm I52 which is connected by a link I53 with a dog-carrying lever I54 having one end pivoted on pin 40. The lever I54 is suitably guided in one of the slots 31 in the backbone and its range of motion is limited by upper and lower stops I55 and I56 respectively, which stops extend between the side walls of the machine and also serve to limit the range of motion for the various type-bar selecting levers of the machine. The lever I54 is guided in a slot I51 in the stop member I55.

Lever I54 has a lower rearwardly extending arm I59 at the rear end of which is pivotally mounted at I60 a dog I6I, a nose I62 of which is normally held slightly out of engagement with driven member I25 by means of a spring I59 connecting the lever to an anchor plate I63 on cross bar 24. The dog I6I is normally held in a substantially horizontal position by a spring I64 connecting a forward end I65 of the dog with a lug I66 formed on the arm I58 of lever I54. This spring causes the nose I62 of the dog to rest upon a small coil spring I61 which extends through the comb-slotted portion of the backbone 25 and serves as a cushioning stop. From the foregoing it will be obvious that depression of any key-lever 35 will swing the universal bar I50 and rock lever I54 around pivot pin 40 carrying arm I 58 of the lever rearwardly and engaging the nose I62 of dog I6I with the driven member I25 which will then be rocked about pivot pin I21 until teeth I22 of pawl I23 are engaged with teeth I2I of roller I20. The driven member or actuator I25 will be moved down by the roller until throw-off screw I4I engages with cam face I40 which disengages the teeth and allows spring I34 to return thedriven member upwardly. If the key of lever 35 is held depressed a shoulder I10 on driven member I25 will engage the nose I62 of the dog in the returning movement. The dog is free to rotate on pivot I60 and will assume an inclined position with its nose I62 held on shoulder I10 until such time as the pressure on the key-lever is released and spring I59 isallowed to return lever I54 to original position. When this happens the dog I6I will ride oil! of the shoulder I10 and spring I64 will return it to horizontal position with its nose against the spring I61.

It will be obvious from the foregoing that whichever one of the denomination-tabulatingstop levers is depressed a corresponding coupler arm I44 will be moved into position for the actuation of the particular lever I43 to which the coupler arm I44 is pivoted and following this a movement of the universal bar by the same movement of the key-lever 35 couples up the actuating mechanism to oscillate bar I29 and rock the selected one of the group of levers I43 to elevate its associated blade I42. 1

To hold the blade in elevated position a simple latching mechanism is provided which includes a shoulder I80 provided by notching the right side of each blade I42 as indicated clearly at I8I in Fig. 4 of the drawings. Between the slots I08 of bar I09 which extends across the mouth of magazine 51 are teeth I82 resulting from the slotting operation. As the blades I42 are elevated and moved forwardly notch I8I comes into matching position with one of the teeth I82 on bar I09 and means are provided for giving the blade a slight lateral movement at this time to snap the shoulder I80 over the tooth I82 sufficiently to hold the blade I42 elevated even though the actuator mechanism has been oscillated to its return position.

The slight lateral movement to effect latching may be from either or both of the following described means. Each blade I42 has a forwardly extending arm I83 to which is connected a return spring I84 the lower end of which is secured to an anchor clip I85 around a pin I86 that passes from one side of the magazine to the other side in ears I81. The forward ends of arms I 83 underlie the universal plate 64 and this plate is itself held in down position, as shown in Fig. 1, against the ends of the arms I83 by a spring I88.

The springs I84 may be connected from the arms I83 to the clip I81 on a slight diagonal to give a bias to the blades I42 tending to urge the shoulder I80 over the tooth I82, but more particularly the action depends upon positioning the slotted plate I09 so that the grooves or slots I08 are slightly out of line with the upper and lower slots III and 56 of the magazine. By this means the long thin reeds I 42 may be slightly flexed so that their inherent resilience is depended upon in large part to cause them to snap the shoulder I80 over tooth I82 and latch the reed.

When any denominational-tabulator stopblade is elevated its arm I83 rotates the universal plate 64 in a clockwise direction, as viewed in Fig. 1, carrying with it an arm I90 secured to the under or rear side of the universal plate. This arm is pivotally connected at I9I with a downwardly extending link I92 which rides at its lower end on pin 65 and which carries a stud I93 positioned in a slot I94 of an arm I95 pivoted on the frame at I96. Downward movement of the link I92 occasioned by rotative movement of universal plate 64 swings the arm I95 downwardly or clockwise as viewed in Fig. 1 around its pivot I96 and against the action of a return spring I91. The arm I95 has an ear I98 which bears against a tall 200 of dog 91 of the escapement mechanism. The dog is rocked by the arm I96 against the opposition of a return spring 20I to release its tooth from the escapement wheel 98, and to hold it released so long as the blade I42 remains elevated in latched position as described. This, of course, frees the carriage to the action of its motor for a tabulating run until one of the carriage stops 80 collides with the particular denominational-tabulator stop which has been latched in stop position. The force of the collision is sufficient to release the blade from its shouldered engagement with tooth I82 whereupon the blade is instantly returned downwardly by its spring I84. As the blade moves downwardly, universal plate 64 follows under the action of its spring I88, lifting link I92, swinging arm I95 in the opposite direction assisted by spring I91, which releases dog 91 to the action of its return spring 20I and restores the dog to its control of the escapement wheel. Thus the carriage is stopped in deilred position and the denominational-tabulator stop is removed from the path of the carriage stops.

To avoid the possibility of interference with the return of the carriage by reason of some one or more of the denominational-tabulator stopblades having been actuated after the last carriage stop has passed the magazine 51, an angle member 205 is arranged over the bar I09 and held in position by a keeper 206 fastened to the bar by a screw 201. The angle member 205 is suitably cut away as indicated at 208 to permit of its free lengthwise movement. The right hand end of the angle member 205, as viewed in Fig. 2 of the drawings, is provided with an ear I12 and a rod I13 projecting from the ear. This rod has a loose guide bearing in a bracket I14 projecting forwardly from the back plate 23 and toward its outer end the shaft I13 is secured in an angle member 2I0 which is loosely pivoted on an arm 2| I which is in turn fixed on a shaft 2 I2 suitably journaled in flanges in the back plate 23. The shaft 2 I2 is rocked by an arm 2 I 3 which is adapted to be moved slightly under control of the carriage as it approaches its line-end. In the event that a power-driven carriage-return mechanism is used this arm may also be rocked at or about the time that the carriage commences its return movement. Whichever actuating means is used the rocking of shaft 2I2 will be translated into a lengthwise movement of rod I13 and angle member 205. Teeth 2I5 of member 205 are normally positioned over teeth I82 of bar I09 so that any set denominational-tabulator stop lies between adjacent teeth 2I5. Movement of angle member 205, therefore, dislodges any set blades I42 from their shouldered engagement with teeth I82 allowing return springs I 84 to retract them from stop position.

Fig. shows the operating mechanism for the arm 2I3 by which the arm is rocked slightly by a conventional margin stop 220 on the typewriter carriage. The arm 2I3 is connected at its free end by link 22I to another arm 222 pivoted at 223 to another arm 224 fixed on a shaft 225 journaled in flanges on the rear wall 23. The link 22I has a stop lug 226 against which the margin stop 220 strikes in the movement of the carriage to line end position. This moves the arm 2I3 and rocks shaft 2I2 to move rod I13 and dislodge blades I42 as above described.

From the foregoing description of the construction and mode of operation of the invention it will be apparent that the operator of the machine may set any number of column or carriage stops by passing the carriage across the machine and operating the Tab-set" key lever at desired points and that subsequently the operator may select any denominational-tabulator stop for power operation by depressing any key 36 of keylevers 35. This throws in a coupling unit corresponding to the particular key actuated thus selecting it for power actuation by an actuating mechanism set in operation by the same depression movement of the same key. Once a particular denominationalatabulator key-lever is depressed the operation of the machine is automatic. The selected denominational-tabulator stop is elevated and automatically latched, the escapement is disconnected, freeing the carriage to the force of its motor, and upon collision of the carriage stop with the particular denominational-tabulator stop which has been set the latteris unlatched and returned to original position and the carriage is simultaneously again brought under the control of its escapement.

Ordinary letter spacing escapement is effected by movement of a universal bar 2l0 which reciprocates a rod 2H for rocking the dog frame I on its pivots IM and I02. In the preferred form of the invention shown in the drawings the univ'ersal bar 2 I6 is actuated by any of a plurality of actuators on the general order of driven member I25 all'of which are arranged in a row across the machine and pivotally mounted on pin I21, and each of which is adapted for movement into engagement with the roller I20 by the various character key levers or space bar lever of the machine which carry dogs corresponding to dog l6l.

What is claimed is:

1. In a machine of the character described, a frame, a motor-driven escapement-controlled carriage movable across the frame, a magazine in said frame, a group of denominational-tabulator stops normally held in said magazine out of carriage-stopping position, settable stops on the carriage, actuators respectively for the denominational-tabulator stops, coupling means for selectively coupling said actuators to a power-operated device, a plurality of denominational-stop key-levers spring held in position in the frame, means connecting said key-levers respectively to said coupling means, a universal bar movable by said key-levers, a power-driven member mounted for movement by said universal bar, a powerdrive element adapted to be engaged by said driven member in said movement, means connecting said driven member to an actuator for a denominational-tabulator stop through a selected coupling to thereby move the stop to operative position; the foregoing being so arranged that movement of a key lever first eifects the selective coupling and then causes said engagement of the driven member to .move the coupled stop, and means for disengaging the driven member when the stop arrives at operative position.

2. In a machine of the character described, a frame, a motor-driven escapement-controlled carriage movable across the frame, a magazine in said frame, a group of denominational-tabulator stops normally held in said magazine out of carriagestopping position, settable stops on the carriage, actuators respectively for the denominational-tabulator stops, coupling means for se lectively coupling said actuators to a poweroperated device, a plurality of denominationalstop key-levers spring held in position in the frame, means connecting said key-levers respectively to said coupling means, a universal bar movable by said key-levers, a power-driven member mounted for movement by said universal bar,

a power-drive element adapted to be engaged by said driven member, means connecting said driven member to an actuator for a denominamoved into latching position and releasable by lateral pressure on the stop.

3. In a machine of the character described,-

a frame, a motor-driven escapement-controlled carriage movable across the frame, a magazine in said frame, a group of denominational-tabulator stops normally held in said magazine out of carriage-stopping position, settable stops on the carriage, actuators respectively for the denominational-tabulator stops, coupling means for selectively coupling said actuators to a power-operated device, a plurality of denominational-stop key-levers'spring held in position in the frame, means connecting said key-levers respectively to said coupling means, a universal bar movable by said key-levers, a power-driven member mounted for movement by said universal bar, a power-drive element adapted to be engaged by said driven member, means connecting said driven member to an actuator for a denominational-tabulator stop through a selected coupling to thereby move the stop to operative position and to release the stop as it arrives at said position, means for latching the stop in moved position comprising a shoulder spring-moved into latching position and releasable by lateral pressure on the stop; and means for restoring any moved stops when the-carriage is at line-end or about to return.

4. In a machine of the-character described, a frame, a motor-driven escapement-controlled carriage movable across the frame, a magazine in said frame, a group of denominational-tabulator stops normally held in said magazine out of carriage-stopping position, settable stops on the carriage, actuators respectively for the denominational-tabulator stops, coupling means for selectively coupling said actuators to a power-actuated device, a plurality of denominational-stop key-levers spring held in position in the frame, means connecting said key-levers respectively to said coupling means, a universal bar movable by said key-levers, a power-driven member mounted for movement by said universal ban-a power-driven element adapted to be engaged by said driven member, means connecting said driven member to an actuator for a denominational-tabulator stop through a selected coupling to thereby movethe'stop to operative position, means under control of. the power-driven member for disabling the escapement control, means for rendering the driven member ineffective .to move the stop when it arrives at operative position and a latch for assuming control of the stop at that position.

5. A tabulator-stop mechanism comprising a magazine and a blade mounted for sliding movement in the magazine, said blade having a shoulder adapted to spring into latching position over a magazine part when moved to stop position, means for moving said blade to stop position, and means for unlatching the blade.

6. A tabulator-stop mechanism comprising a magazine and a blade slidably mounted in the magazine, said blade having a shoulder adapted to spring into latching position over a magazine part when moved to carriage-stopping position, means for moving said blade to carriagestopping position, and means including a stop on the carriage ior unlatching the blade.

7. A tabulator-stop mechanism comprising a blade, means for slidably mounting said blade, means for moving said blade to a carriage-stopping position, a latch mechanism comprising a part in fixed relation to said mounting means. and means for laterally .urging the blade, when moved to carriage-stopping position, into shouldered engagement with said part.

8. A tabulator-stop mechanism comprising a blade, means for slidably mounting said blade, means ior moving said blade to a carriage-stopping position, a latch mechanism comprising a part in fixed relation to said mounting means, means for laterally urging the blade, when moved to carriage-stopping position, into shouldered engagement with said part, and carriage-operated means for engaging said blade in an opposite lateral direction for unlatching the blade.

9. A denominational tabulator mechanism comprising a frame, a group of selectively movable blades in said frame each having a shoulder adapted to spring into latching position with said frame when a blade is moved to carriagestopping position, means for moving .said blade selectively to carriage-stopping position wherein the selected blade is adapted for release from said shouldered engagement by impact of the carriage, and a line-endrelease device embracing all or the blades so as to be eil'ective to release the shouldered stops when the carriage. reaches the end oi a line of travel and before return.

10. In a typewriter having a movable paper carriage, a denominational-tabulator mechanism comprising a group of selectively movable stops, key levers for selectively adapting said stops for power actuation, power means for moving any adapted stop to stop position, means for latching the stops in stop position and permitting release of a stop as the paper carriage banks against it in letter-feeding direction, and another stop-releasing device automaticallyoperative to insure release of all oi the stops from the latching means prior to return of the paper carriage. l

11. In a typewriter having a movable paper carriage, a denominational-tabulator mechanism comprising a group of selectively movable stops, key levers for selectively adapting said stops for power actuation, power means for moving any adapted stop to stop position, a latching device comprising a plurality of shoulders and means for urging the moved stops over said shoulders and holding them there until the carriage banks against them, and means operative at the line end of carriage movement to positively dislodge the stops from said shoulders.

RUSSELL G. THOMPSON.

CERTIFICATE OF comcwion. Patent No. 2, 85,7 2. I January 2, 191,9.

RUSSELL e. momrson. It is hereby certified that error appears in the printed specification of the above'numbered patent requiring correction as follows: Page 5, second coluxm, line 55, claim' 1;, for "power-driven" read power-drive; and that the said Letters Petent should be read with this correction therein that the same may conform to the record of the case in the Patent Office;

Signed and sealed this 50th any of January, A. 1). 191m.

Henry Van Arsdale Acting Commissioner of Patents.

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