US2384060A - Typewriting machine - Google Patents

Description

Sept. 4, 1945. H. c YAEGER TYPEWRITIN G MACHINE 6 sheets-sheet 1 Filed Dec. 30, 1942 INVENTOR HARRY C. YAEGEP BY [d ATTORN EY I M /76 4 mnw *mllll \Mmmun I Sept. 4, 1945. H. c. YAEGER TYPEWRITING MACHINE Filed Dec. 30, 1942 6 Sheets-Sheet 2 INVENTOR HARRY C. VAEGER BY ATTORNEY Sept. 4, 1945. H. c. YAEGER TYPEWRITING MACHINE Filed Dec. 30, 1942 6 Sheets-Sheet 3 INVE NIY'ORI HARRY C. YAEGER BY'/(,y

ATTORNEY TYPEWRITING MACHINE Filed Dec. '30, 1942 6 Sheets-Sheet 4 V INVENTOR HARRY C YAEGER Sept. 4, 1945. H. c. YA EGER TYPEWRITING MACHINE Filed Dec.- 50, 1942 '6 Sheets-Sheet 5 INVENTOR HARRY C. YAEGER BY )6 ATTORNEY P 1945- H. c. YAEGER 2,384,060

TYPEWRITING MACHINE Filed Dec. 36, 1942 6 She ets-Sheet 6 INVENTOR HARRY C. YAEGER %Wp 7 ATTORNEY Patented Sept. 4, 1945 UNITED STATES PATENT orrica TYPEWRITING MACHINE Harry G. Yaeger, West Hartford, Conn., assignor to Underwood Corporation, a corporation Delaware Application December 30, 1942, Serial No. 470,677

(Cl. 19717'l) 39 Claims.

means for projecting tabulating stops to tabulation controlling positions.

Another object of the invention is to provide a power-actuated tabulating mechanism, particularly suitable for denominational tabulating, embodying eiiicient and simple means whereby the stops, upon projection, remain reliabl projected pending the termination of the tabulating movement as controlled by the projected stop.

A further object of the invention is to provide, in a power-actuated tabulating mechanism having resilient stop-projecting means, positive, simple and efficient, power-actuated retracting means which become effective automatically as the carriage is arrested under the control of the projected tabulator stop.

It is also an object of the invention to provide, in combination with the novel tabulating mechanism herein featured, an 'eflicient and simple palm-key device under control of which one of the group of tabulating stops is efilciently projectable.

It is another object of the invention to provide means whereby the tabulating stops are not liable to obstruct return travel of the carriage when the latter reaches or is stationed in its extreme line-= end position.

A still further object of the invention is to provide, in combination with the present novel tabulating mechanism, certain devices which provide for the automatic retraction of any projected tabulator stop when the carriage reaches a lineend position defined by a margin stop, wherefore the carriage is then unobstructed in its return movement.

Also an object of the invention is to provide a tabulating mechanism in which a relatively great number of tabulator stops are selectively projectable from the keyboard through a greatly reduced number of controlling connections, so that other mechanisms in the machine are more accesible for inspection and repair than would be possible otherwise.

Other objects will be in part obvious, and in part pointed out particularly as the following description of two preferred embodiments of the invention proceeds.

In the accompanying drawings:

Figure 1 is a skeleton front-perspective view of the new tabulating mechanism.

Figure 2 is a right-hand side view of a typewriting machine embodying the tabulating mechanism of the present invention, portions of the machine, especially almost all of a right side wall, having been broken away for more clearly illustrating the invention.

Figure 3 is a fragmentary front elevation, showing a series of denominational tabulator stops and a housing therefor one of the tabulator stops being shown projected and the carriage having been intercepted by this stop.

Figure 4 illustrates in right side elevation, a part of a tripping mechanism shown in Figures 1 and 2, in an operated state suppressing repeat tabulation.

Figure 5 illustrates in right side elevation a mechanism whereby in response to the conclusion of a tabulating run of the carriage a projected tabulator stop is automatically retracted by power, the mechanism being in an operated state.

Figure 6 is also a right side elevation and shows one of a series of tabulator stops spring-moved to projected position under control of one of a series of tabulator keys.

Figure '7 shows the tabulation stripping mechanism of Figure 4 modified to provide for repeat tabulation.

Figure 8 is an exploded diagrammatic frontperspective view illustrating a key controlledpermutation mechanism by means of which the various tabulator stops may be selected for projection;

Figure 9 is a front perspective view showing in separated relation two parts of a comb and bracket structure serving to support and guide certain parts of the tabulating mechanism.

Figure 10 is a front perspective illustrating the supporting structure for the tabulating keys, and separated therefrom, a separable unit including certain parts of the aforesaid permutation device.

Figure 11 is a fragmentary front view in which the carriage is in line-end position and in which, in consequence thereof, a lever has been operated to cause a stop retraction operation in the machine.

Figure 12' is a fragmentary front view showing forth later.

the denominational stops of Figure 3 in their normal positions and showing the carriage in an absolute line end position.

Figure 13 is a side view similar to Figure 2, but depicts a modified form of the invention wherein each tabulator stop is releasable for prousual manufacture, designated in Figure 2-by the reference numeral l5, normally restrains the carriage l2 against advance movement by a spring motor l6, through the medium of a draw band I! which isattached to the carriage rail i3, see Figure 1. Said escapement [5 includes a dog i8 which is normally in carriage movement controlling engagement with an escapement wheel 20, the latter of which, together with a shaft 2| and a pinion 22, is unitarily rotatable in brackets 23 and 24 secured to the general framework of the machine. 25 on the carriage and it will be seen from the aforesaid that the escapement I5 is normally in control of the carriage.

Extending along the rear of the carriage and carried thereby is a rack 26 which supports a series of column-defining tabulator stops 21, preferably key-settable. Underneath these columndefining stops 21 there are arranged in closely,

adjacent relation a plurality of denominational tabulator stops in the form of slidable blades or reeds 30. All the stops 30 are normally positioned asv shown in Figure 2, that is, they are normally out of tabulation controlling range with the column-defining stops 21.

The blades or reeds 30 are made of thin stock and are guided for vertical movement in open slots 3| provided in a bracket or comb plate 32, see Figures 2, 3, and 9, another bracket 33 being superposed upon the bracket 32 and a bar portion 34 thereon closing up the front ends of the slots. Both the brackets 32 and 33 are secured to the under side of a rear wall 35 of a housing 36 wherein the stop reeds 30 are accommodated. At their upper ends, the reeds protrude through a rectangular opening 31 provided in a top-plate 38 constituting part of the housing 36. The upper ends of the reeds 30 fit slidably between front and rear edges of the top-plate at the opening 31 and the latter is of suflicient length to give The said pinion 22 meshes a rack the upper ends of the stop reeds capacity for some movement in parallel to the direction of the carriage travel, for a purpose which will be stated later. Each reed or blade 30 has riveted or otherwise secured to its left side a thin spacer plate 39 and the reed and spacer plate assemblies are normally compacted against each other rightwardly against an edge of the top-plate at one end of the opening 31, in a manner to be set The thickness of each reed together with its spacer plate equals a letter-feed space.

Associated with each stop reed 30 and attached to rearwardly reaching branches 40 thereof are contractile springs 4| which urge the stop reeds 30 upwardly, thereby to project their upper ends into tabulation controlling range with the column stops 21. However, in order that a desired stop tional blocking mechanism for the reeds 36, generally designated by the reference character 43, must be selectively operated.

Primarily the bail 42 serves to retract the stop reeds 30 whenever a tabulation is being concluded and, preferably, for reasons to be pointed out later, is releasably detained in its lowered position following its stop-retracting movement. As best seen in Figure l, the bail comprises a straight bar portion 44 which overlies ledges 46 integral with the lower ends of the reeds 30, and two side arms 48 which reach forwardly from the bar portion 44. At the front the ball 42 is stiffened by a rod 41, and together therewith pivots on a rod 48 carried by and extending intermediate the side walls 43 of the housing 36. A pitman 50 articulated at opposite ends to the rod 41 and to an arm 5! fastened on a transverse shaft 62, oppositely connects the latter with the ball. The shaft 62 is rockable within the framework of the machine and at its right end has fastened thereto a pendent arm 63 of which a bent-off tongue 54 normally bears against the rear end of a fore-and-aft extending latch lever 55, the arm 53 being urged forwardly under the tension of a spring 66 exerting always an upward pull on the ball 42. See Figures 1 and 2. The said latch lever 56 is pivoted intermediate its ends at 61 to a bracket plate 68 having front and rear ends oppositely located in slots provided respectively in pivot rod supporting members 63 and 60 of the machine, the respective rods 68 and 69 of which serve to anchor the bracket 63 securely to said members. Upon depression of any one of a series of denominational tabulator keys 65, in amanner to be set forth in detail later, the latch lever 55 is rocked counterclockwise from the Figure 2 to the Figure 6 position, the tongue 54 being thereby freed for forward movement, thereby allowing the bail 42 to rock, wherefore all the reeds 30 are free to rise in so far as the bail is concerned. However, the aforesaid stop blocking mechanism 43, under selective control of the depressed tabulator keys 65 is then effective to block all but the desired reed 30 against projection, the result being that only the desired reed will become projected. The said blocking mechanism 43 comprises horizontally disposed slides 6|, 62, 63, and 64 arranged behind each other, all overlying the said rearward branches 4!) of the stop reeds and each having a, set of differently disposed notches 61, whereby, upon operation of different ones or different combinations of these slides, diiferent individual stop reeds are free to rise to tabulation controlling positions, it being understood that a reed in order to rise must be free to enter a notch 61 in every one of the slides. In the arrangement illustrated in Figure 8, the various denominational reeds 30 from left to right, beginning with the leftmost one, that is, the one of the lowest denominational order, are free to rise upon the respective operations of the slides, iii, 62, 63, 64, 6| and 62, 6| and E3, 65 and 64, 62 and 63, 62 and 64, and 63 and 63. The notched slides underlie the bracket plate 32, and flanges 68, bent downwardly at spaced locations from the plates 32 and 33, provide rear and bottom guides for the slides. The reeds 30 serve to retain the slides at the front and for reducing the frictional contact between the notched slides, the latter have protuberances it which are instrumental to provide large clearance areas therebetween. At their right ends, each slide 6!, 62, 63, 64, has two vertically opposite extensions II, and to one of which on each stop there is attached a spring 12 for restoring its associated members 88, the various ears being formed by transversely slotting an elongate top-ridge of the cross member 88, and the bell cranks 14being guided for vertical operation between the said ears. Each bell crank 14 includes an upwardly reaching arm 11 disposed behind a series of superposed elongate plate members 8|, 82, 88, and

84, all extending along the rear of the array of tabulator keys and all being movable in horizontal planes. As best seen in Figures 1 and 10, each of said plates 8|, 82, 88, and 84 is restrained for bodily movement fore and aft by two levers 85 arranged end to end intermediate a rectangular, elongate clearing 88 of the associated plate. The levers 85, where meeting end to end, have toothed connections 81, and the other ends of the levers have toothed connections 88 with their associated plates at the ends of the said clearings88. The said levers 85 are pivotally carried upon a narrow transverse shelf 98 by means of shoulder screws 8|, spacing washers 92 being provided on said screws intermediate the levers and 'also intermediate the lowermost levers and the shelf.

Each of said plates has secured thereto, by spot welding or otherwise, at the underside, at the region of the toothed connections 88, a leaf 83; and as is evident from Figures 1 and 10, the leverends thereat overlie the leaves 93 thereby to keep the plates permanently linked to the levers 85.

' It may be noted here that all the levers 85 are identical in form and that their spacing'leaves 88 may be interposed between the toothed connections 81 of the respective pairs of levers, each of the leaves 88 preferably being spot welded or otherwise bound to one of the pairs of levers 85. See Figure 10. The shelf 98, together with the said plates and the levers 85, comprises a unit 84, see Figure 10, which is fastened by means of nuts 85 and pendent studs 96 on the shelf 98, to a plurality of mounting lugs .91 which are integral with the cross member 88. Taking note of the various notches I88, provided along the rear edges of the plates 8|, 82, 83, and 84 (see Figure 8), it will be seen that different ones or different combinations of these plates are adapted for bodily forward displacement by the individual bell crank arms 11 of the tabulator keys 85. The arrangement of the notches is such that the operation of the plates 8|, 82, 83, 84, 8| and 82, 8| and 83, 8| and 84, 82 and 83, 82 and 84, and 88 and 84 is effected respectively, under control of the various tabulator keys 85, beginning with the lowest and ending with the highest denominational order. The four plates 8| 82, 83, and 84 are respectively connected to the four reed the other ends being attached to the several bell cranks I88 which, as seen in Figure 3, are pivoted upon a stud II4 reaching downwardly from the bracket 88. At their front ends, see Figure 10, the casings I81 extend into and are anchored by screws III in an upright boss I I2 of the shelf 84, while the rear ends, see Figure 3, are similarly anchored in a block II8 fast on a downwardly bent branch I" of the bracket 88. The said cables are thin and flexible; and since they are fewer in number than the tabulator keys, they are easily accommodated in the machine embodying a great number of tabulator keys. Furthermore, the cables may be conveniently shifted for access to other mechanisms. In the embodiment of the invention shown, the cables lie close to the right side wall of the machine and thus leave the center of the machine free for accommodating the typing mechanism, not shown.

The tabulator keys 85 are limitedlyoperable to equal extents and, referring particularly to Figures 1, 8, and 10, it is evident that the plates 8|, 82, 83, and 84, due to their differing locations, from the pivot wire 15, are operated to different extents, the lowermost plate 8| receiving the smallest motion. On the other hand, it will be seen that the uppermost bell crank I85 operates upon its associated slide 84 nearest to the pivot stud H4, and that the progressivel lower bell cranks I85 operate upon their respectively associated slides at progressively more distant points. The entire arrangement is such that the differing motions received by the plates 8|, 82, 83, and 84,

' and transmitted by the wires I88, are translated blocking slides 6|, s2, 83, and 84 by Bowden wire into slide motions of equal magnitude.

The aforesaid springs 12 acting upon the slides 8|, 82, 88, and 84 tend also to return the plates 8|, 82, 88, and 84 to normal positions, and are assisted in this by a spring member 8 secured to the front edge of the shelf 84 and having oppositely branching leaves bearing upon the several plates. Contractile springs attached to the bell cranks I4 serve to restore the tabulator keys 85, and it will be perceived from Figure 10 that the upper ends of these springs are attached to a common anchorage rod I2| lying in a groove I22 of the shelf 84, clearances I23 for the springs being provided in the shelf.

Reviewing the connections between the keys 85 and the blocking slides 8|, 82, 88, and 84, it will be seen that the tabulator reeds 38 of the various denominational orders are free to rise upon depression of tabulator keys of corresponding orders.

As has been previously stated, the latch lever 55 is rocked counterclockwise to the Figure 6 position when any one of the tabulator keys is onerated and to this end a, lever I24, pivoted upon the aforesaid rod 15 and located between two ears I25, is operable by any of the plates 8|, 82, 83,

and 84; and when so operated, acts upon an arm any reed that is permitted to rise by the slides- GI, 82, 83, and 84.

The bail has an arm I21 having an articulation with a lever I28 which is pivotally carried on the framework of the machine and which is adapted to throw the escapement dog I8 clear of the escapement wheel 28 upon upward movement of the bail 42. The carriage is thus released to the influence of the spring motor I6 when any one of the tabulator keys 65 is depressed, and will consequently advance leftwardly until one of the carriage-borne tabulator stops 21 is intercepted by the projected tabulator reed 30.

At this point, it should be remembered that the reeds are normally crowded against the right end of the opening 31 and are capable of some leftward displacement. Thus, since operation of any tabulator key causes the carriage to be drawn leftwardly by the motor I6, it follows that any projected stop reed, together with whatever reeds are leftward thereof will .be displaced leftwardly by the engaging carriage-bornestop 21. Bearing rightwardly against the leftmost reed 30 is an upright arm I30 of a three-armed pivoted member I3I which receives a counterclockwise motion whenever any of the projected reeds is displaced leftwardly, and it is responsive to receipt of this motion that the projected reed is caused to be retracted automatically by power.

.As shown in Figure 3, said displacement of the reeds 30 is adjustably limited by a screw I29, the object being to effect the arrest of the carriage in positions wherein the letter feed mechanism is adapted to assume definite control. According to the embodiment of the invention shown, said power retraction is effected through a power mechanism comprising a continuously motordriven fluted shaft I 32 whereto an actuator I33 bearing a toothed element I34 is adapted to be transitorily connected in order that a reed-retracting motion be transmitted to the said ball 42.

The said actuator I33 is pivotally connected at its front end on a pendent arm I35 which is swingable fore and aft on a pivot rod I36 provided upon a cross member I31 of the machine, the cross member having a slot I38 to accommodate and guide the arm. As seen in Figure 2, the actuator is normally raised clear of said fluted shaft I32 against an angular bar MI by a spring I42 which is anchored to the bar and so disposed as to urge the actuator also rearwardly. Normally, as seen in Figure 2, the said pendent arm I35 bottoms in the slot I38. The said motion of the three-armed member I3I received incidental to the displacement of the projected reed, is transmitted over a link I43, a pivoted lever I44, another link I45, a pivoted bail I46, another lever I41, and a hook-shaped member I48, to the said actuator I33, in a manner to draw the toothed element I34 thereon into engagement with said fluted shaft I32, the result being that the said fiutedshaft I32, after first imparting a limited pivotal movement to the toothed element I 34, will bodily displace the latter and the actuator forwardly. This brings about the restoration of the ball 42 through the intermediary of a short link I5I and an arm I52, the latter of which.

may be integral with the arm 53 and fast therewith on the shaft 52. The mechanism just described provides for the restoration of the reeds in a reliable and positive manner and it will be observed that no delicate and costly mechanism is employed to maintain the reeds projected during .the tabulations.

Obviously the pivotal lost motion of the toothed element I34 on the actuator link I33 delays the power retraction of the projected reed or blade 30,so that some time passes between the displacement of the projected tabulator reed and the actual retraction thereof effected by operation of the bail 42. it is to be understood that the retraction of the reed is effected only after said reed or bladehas intercepted the carriage in its tabulating run.

As is evident from Figure 5, the arm 53 is restored a little beyond the normal position shown in Figure 2, at which time the toothed element I34 is forced upwardly out of driving engagement with the fluted roll through engagement of a downwardly reachin actuator projection I53 by a tooth of thefiuted shaft. As the toothed element is forced clear, the said actuator spring I42 will lift and return the actuator to normal position, a pin-and-slot connection I54 being provided intermediate the actuator and the link I5I to allow such restoration independently of the arm.53, and, therefore, the ball 42. As the bail 42 is restored, the arm 53 moves rearwardly; and either the said latch lever 55 or a secondary latch I55, or both successively, will detain the arm 53 until another depression of the tabulator key is effected. If the operator releases the tabulator key before the power restoration of the ball is effected, the rearend of the latch lever 55 will descend in front of the tongue 54 on the arm 53 and thereby will hold the ball against upward movement. On the other hand, in the event the operator should maintain the tabulator key depressed, the said secondary latch III) yielding, as shown in Figure 6.

I55, which maybe pivotally carried on the lever 55, will be in a position to prevent forward movement of the arm 53. A spring I56 is attached to the latch I55 in a manner to urge its latching end upwardly against the latching lever 55 and to exert simultaneously a restoring influence on the latter. Normally, as seen in Figures 1 and 2, the extreme rear end of the secondary latch I55 lies underneath the tongue 54 and permits the latter to swing forwardly upon tabulator key operation, the latch I55 being If, upon restoration of the bail 42, a tabulator key should still be held depressed, the said secondary latch I55 will be in the Figure 4 position and will prevent repeat tabulation, it being necessary to first release the depressed tabulator key to allow escapement of the tongue 54 from the secondary dog I55 on to the rear end of the lever 55. When the bail 42 is held under control of either of the latches, the rearward branches 40 of the reeds are clear of the bottom edges of the slides 6|, 62, 63, and 64 so that the latter are freely movable under control of the tabulator keys and so that the restoration of the tabulator keys need not be effected before the conclusion of the tabulating run, that is, before the power restoration of the bail. concomitantly with the restoration of the bail, the carriage is restored to the control of the escapement by the return of the lever I28 to normal position.

In certain classes of work, it is frequently desired to skip columns; and to expedite the work, the secondary latch I55 may be eliminated and the spring I 58 directly connected to the latch lever 55, as illustrated in Figure 7. If this is done the column-defining stops 21 will successively intercept the carriage in cooperation with the selected tabulator reed, the selected reed being automatically withdrawn and reprojected in response to each engagement of the reed by a stop 21, providing, of course, that the operated tabulator key is maintained depressed. In other words, the carriage will continue to move from column to column as long as the latch lever 55 is held in operated position by the tabulator key.

The three-armed member I3I is normally positioned So that its pendent arm I51 is in engagement with an adjustable abutment I88, the latter of which is so adjusted that the upwardly branching arm I36 does not press the reeds together tightly, but merely crowds them loosely against th right end of the opening 31, the effect being that the reeds are freely projectable by their springs which, preferably, are very light. If, therefore, a reed in being projected collides head on with a set column stop 21, no damage will ensue even though the stop 21 may be of a r dly supported kind. On the other hand, a settable stop, for example of the kind shown in the patent to Helmond No. 2,278,010, dated March 31, 1942, will not become unset. Under the circumstances just described, the projection of the reed follows after a slight movement of the carriage.

Describing now more in detail the operating train between the three-armed member I3I and the actuator I33, it will be noted from Figures 2 and 3, that the member I 3i is pivotally carried on the rear wall 38 of the housing 33, and that the link I43 is guided near its upper end in an open slot III of the plate 32, the open side of the slot being closed by the bar 34 of the plate 33. The ball I48 is pivotally carried on the shaft 32 and its right end has a pin-and-slot connection I62 with the leved I41. The entire mechanism, I3I and I43 to I48, inclusive, is under the influence of a spring I63 which pulls upwardly on the lever I41 in front of the pivot rod 66 whereon said lever is pivoted. It should be understood that following the retraction of a reed 38, the lever I41 and its associatedv operating train are restored by said spring I63 and that the reeds 38 consequently again become crowded rightwardly. The bracket plate 58 and said lever I41 are in close adjacency and the latter is restricted against overthrow in either direction by two stop ears I84 projecting from the said bracket.

The hook-ended element I48 has a pin and slot connection I65 with the supporting lever I41, and is urged by a spring I66 forwardly and downwardly to occupy normally the position illustrated in Figures 1 and 2, a lug I61 on the element I48 being cooperative with the lever to limit forward motion f the hook-end of the element I48 and being posed normally over a projecting ledge I68 of the actuator I 33.

Directing particular attention to Figures 1 and 2, it will be seenthat the latch lever 55 is also operable under control of a tabulator key "I, wh ch is disposed for conven'ent operation at the right end of the keyboard in front of type keys indicated at I12 (see Figure 1) by the palm of the operators hand. This key comprises a lever including an upright arm I13 which is operative upon a pivoted member I14 overlying the extreme r ght end of the arm I28. Both the palm tabulator key "I as well as said member I14 ar pivoted upon the right side wall of the machine and a spring I15 associated with said member serves to restore both said member and said key to their normal p s tions. as determined by the en"agement of t e lever a a nst a boss I16 on the ri ht s de wa l '0 of the machine. The operation of the palm key I1I is limited in a manner not shown. From the fore oi g it is evident that operation of the palm ey I1I causes the operat on of the latch lever 55 and, consequently, the release of the ba l 42 for upward d splacement. as illustrated n Fi ure 6 in connection w th a tabulat r key 65.

,The slides GI, 62, 63, and 64 are then in sole control-over the reeds, inasmuch as the operation of the palm key In has no connection with said slides and leaves them undisturbed in their i of the slides; wherefore, upon each depression of the palm key, only the said leftmost reed is free to rise to tabulation-controlling position. Of course, the slides, if desired, may be notched opposite any other reed instead of the leftmost one, in which case at the operation of the .palm key I1I such other reed would become projected. The above-described palm key tabulating mechanism may be omitted entirely from the machine, and the leftmost notch on the slide 6I narrowed to block the reed normally but to release it upon depression of the leftmost tabulator key 85. Tabulating operatons effected under control of the pahn key are terminated in the same manner as those effected under control of the regular tabulator keys 65. such termination, of course, involving always the automatic retraction of the Prolected reed.

Typewriting machine carriages are usually prov ded with left and right margin stops I11, I 18, respectively, which cooperate with frame-supported counterstop means to restrict typewriting between desired margins. The counterstop means in the present machine comprises a lever I8I which is swingable about a pivot stud I82 to a limited degree as defined by the aperture I83 n the top plate of the housing 36. The lever I8I may constitute a part of a power-carriage-return controlling mechanism of which a portion is indicated by the reference character I84 and which is fully disclosed in the patent to Helmond No.

2,262,676, dated November 11, 1941, and need' here not be described. A spring I85 urges the lever I8I rightwardly to normally occupy the positi on indicated in dot-and-dash lines in Figure 11. At the approach of the line-end, the margin stop I18 engages and displaces the upper end of the lever I8I causing the lever to move to the full-line position of the same figure. The movement thus 1 imparted to the lever I8I is utilized to bring about 'an operation of the actuator I33 to assure that no tabulator reed be in a projected posit on when the line end is reached, and thereby to render the carriage returnable without interference. Ob-

viously, if a tabulating run is foreshortened under control of the line-end margin stop I13, there ensues no tabulation-terminating displacement of the projected reed, and consequently no retraction of such reed as a result of such displacement. For bringing about the operation of the actuator I33, 9. rightwardly extending arm I86 of the lever I8I underlies the rear end of the lever I41 and operates the latter incidental to the carriage reaching the line-endposition as defined by the margin stop I18. See Figure 11. This brings about a transitory connection of the actuator I33 with the fluted shaft I32, resulting in a power retraction of the projected reed. In view of the fact the carriage may remain in line-end position for some time. it follows that the lever I8I may also emain operated. However, repeat operation of the actuator I33 is frustrated since the actuator ed e I68 returns along a line above the hook face of the member I48. the latter becoming slightly displaced rearwardly against the tension of said s ring I66. It is thus evident that the member I48 will only bring about another operation of the actuator I33 by a new actuation of the lever I8I.

As seen in Figure 11, the pivot stud is located in a substantially vertical slot I81 of the lever .I8I, and the spring I85 is so disposed that the lever I8I pivots normally about the lower end of the slot. When it is desired to type beyond the margin defined by the line-end stop I18, the lever I8I is lowered by operation of a marginrelease mechanism which may include a forked arm I88 associated with a pin I8I below the pivot stud I82. The margin-release mechanism is fully shown in the said patent to Helmond and includes'a margin-release key, not shown, in the present drawings, which, when operated, lowers the said lever I8I below the margin stop I18 through the medium of said forked arm I88. Thus, it is possible to move or tabulate the carriage beyond the position defined by the lineend margin stop, as far as the absolute traveling limit of the carriage. In any case the carriage must be free for returning it the absolute lineend limit is reached. To this end, as seen in Figure 12, a permanent stop I82 is provided at the right end of the 'row of tabulator stops 2! and presents in the line-end limit position of the carriage, a rounded cam edge I93 in the pro- Jecting path of the reed 38 of the lowest denominational order, so that-if the units of cents key 85 or the palm key III is operated, the said reed, in being projected, will be cammed leftwardly and will cause a power operation of the actuator I38 and consequently a reed-retracting motion of the ball 52. Should the operator, in this absolute line-end position, operate any of the other tabulator keys 55, the ball 62 will be freed and the proper slide or slides operated, but all the reeds will be blocked against projection by a rightward extension I94 of the stop I92. The said stop extension I94 maintains the said reeds 3t low enough so that the slides SI, 52, 63, and 66 can return freely to their normal positions upon the release of the operated tabulator key. Therefore, it will be seen that if any one or more tabulator keys are operated with the carriage in absolute line-end position, the carriage will be nevertheless free for return movement substantially as though no tabulator key had been operated. Of course, the operator may operate a tabulator key while the carriage is in a position a few letter-feed spaces leftward of the absolute line-end; and in such event, the resultingly projected reed will be displaced leftwardly by its encounter with the stop I92 during the travel of the carriage in the same manner as outlined in connection with the column-defining stops 2?,

and the projected reed will be automatically withdrawn.

It is desirable to suppress typing, carriage return and other operations, while tabulating operations are in progress; and to this end, the latch lever 55 has a nose I95 which enters between two of a series of shiftable elements I96 whenever any of the tabulator keys 65, III are operated. The said series of elements are movably disposed between two abutments, not shown, and the said nose I95, when moved between the said two elements, crowds the elements oppositely and thereby locks the type keys, as also the carriagereturn tripping mechanism, against operation, in a manner well known in the art but not shown. By virtue of the lever ,55 remaining operated throughout the tabulation, the said-nose I95 remains between the said elements throughout the tabulating operation, independently of the release of the tabulator key. On the other hand, the operation of any type key, or the tripping of the carriage-retum mechanism crowds the elements I88 directly associated with said nose I95 so that the reeds 38 are then unprojectable.

In Figure 13, there is-shown a modified controlling mechanism for the reeds 80, which mechanism may be preferable to the permutational controlling mechanism hereinbefore described, particularly when only a few tabulator keys are employed or when the machine to which the in vention is applied, provides ample room for accommodation of a full complement of individual controlling connections from the tabulator keys to the projectable stops or reeds 30. In Figure 13,

I suchparts, which function and are substantially the same as hereinbefore described, are designated by the same reference characters as have hereinbefore been assigned to them. Instead of the aforesaid permutational mechanism, there is provided a set of tabulator key levers I91, one for each reed 30, which levers may be pivoted on a common frame-supported pivot rod I98 at some distance below the reeds. Each lever has rising from the saidpivot rod an upright arm 2M ending in a hook 202 overlying one of the ledges 45 of the reeds 30. The ledges 45 are nor-' mally in contact with the ball 42 but are slightly spaced from the said hook ends 202. Individual springs 203 resiliently maintain the said key 1evers I97 in their normal positions wherein their forward portions are in contact with a stop plate 2%. Each of the key levers I 91 has a nose 205 overlying a pivoted bail 205, the latter of which may have said latch lever integrally formed therewith at one end. The unitary structure comprising the lever 55 and the bail 206 is resiliently maintained in the illustrated normal position by the aforementioned spring I56. Upon operation of any one of the tabulator key levers I91, the said ball 206 and associated lever 55 become actuated with the result that the arm 53 is freed for forward movement, wherefore the ball is consequently freed for upward movement. concomitantly, as the bail 42 is freed, the operated key lever hook 282 moves forwardly of the ledge 45 of the associated reed so that this reed will become spring projected. Upward displacement of the ball 32 causes the release of the escapement in the manner previously described, and a tabulating run of the carriage ensues which becomes terminated responsive to the engagement of a column stop with the projected reed, the reed being then automatically retracted by an automatically instigated power restoration of the bail $2, in the same manner as hereinbefore described. I

In both embodiments of the invention shown, the bail 32 is normally in latched position and the reeds 30 bear resiliently upwardly against the ball, but have some clearance with the lower edge of the notched control slides 6|, 82, 63, and 6 thereby to allow free reed selecting movement of the latter. Although such construction is desirable, it is obviously not an essential part of the invention and the bail need not be latched normally to hold the reeds.

In Figure 1 the tabulator key of the lowest denominational order is at the left and the other oi the keys in the order desired and by correspondingly re-iocating the notches I" in the plates ll, 82, 83, and 8|.

The invention has been described herein with reference to the details of construction shown but is capable of embodiment in diil'erent forms and certain features thereof are susceptible for use without others. Furthermore, although the invention has been described in association with a particular form of a typewrlting machine, it is applicable to other typewriting machines; such as, for example, to flat-platen machines wherein tabulator keys are usually supported on a carriage supporting the typing mechanism.

The scope of the invention is as indicated in the following claims:

1. In a typewriter having a plurality of tabulating stops individually projectable for differentially arresting a carriage in ensuing tabulating runs; spring means adapted to project said stops, and means to render said stops restored and to detain them selectively releasable for projection by said spring means, said rendering means ineluding a normally inefiective power device, common to all said stops, being responsive to the tabulating arrest of the carriage by any projected stop to retract any such stop.

2. In a typewriting machine having a carriage member movable on a frame member, a tabulating mechanism com-prising, stop means on one of said members, a stop on the other member projectable into tabulation terminating range with said stop means, means constantly urging projection of said stop, an operable element, and means normally blocking said stop against movement into said range, responsive to the operation of said element to allow projection of said stop, and responsive to tabulation terminating engagement of said stop means with said stop to render the latter retracted.

dividual projection into. tabulation controlling range with said stop means, means urging projection of all said stops, means for. selectively controlling projection and for eflecting retraction of said stops, selectively conditionable to free any desired stop for projection by said urging means, sa d controlling means including power means common to all said stops and responsive to tabulation terminating engagement of any projected stop with said stop means, to retract any projected stop.

4. In a typewriter having a plurality of tabulating stops individually projectable for differentially arresting a carriage in ensuing'tabulating runs, spring means adapted to project said stops, normally inefiectively conditioned means for imparting tabulating motion to the carriage, and means to render said stops restored and to detain them selectively releasable for projection by said spring means, said rendering means including, key-responsive means to release said stops selectively to the influence of said spring means and to render said imparting means concomitantly eifective, and means responsive to the termination cf the tabulation under control of any projected stop to render said imparting means inefiective and concomitantly to retract the projected stop.

5. In a machine having a carriage adapted to execute tabulating runs, a plurality of tabulating stops selectively projectable for variably controlling the extents of the tabulating runs, and means to project and retract said stops, comprising, means urging projection of every one of said stops, means normally blocking all said stops against projection, but being selectively conditionable to unblock any one of said stops for projection by said urging means, normally inefiective power means universal to all said stops for retracting them, and means to call said power means automatically into operation in consequence of the carriage approaching the end of the tabulating run.

6. In a machine having a carriage adapted to execute tabulating runs, a plurality of tabulator stops individually projectable for variably controlling the extents of the tabulating runs, means urging projection of said stops, means ,universal to said stops and movable from and to a normal position respectively to allow projection and to efiect retraction of said stops, blocking means for said stops selectively operable to block all but a desired one of said stops against projection, and power means responsive to the selective operation of said blocking means to move said universal means from said normal position, and effective automatically in consequence of the carriage approaching the end of its tabulating run to move said universal means to said normal position, whereby responsive to the selective operation of said blocking means a selected stop will be projected by said urging means and whereby any so projected stop is automatically power-retracted at the end of the tabulating run of the carriage.

7. In a machine having a carriage adapted to execute tabulating runs, a plurality of tabulator stops selectively projectable for variably limiting tabulating runs, means urging projection of said stops, keys, means, normally blocking said stops against projection, selectively conditionable by operation of said keys to unblock desired stops for projection by said urging means, means universal to said stops movable from one to another position to retract said stops, power means, means automatically operative in consequence of the carriage approaching the end of its tabulatirig run, to cause said power means to move said universal means from said one to said other position, and

means to hold said universal means in said other position at least pending the restoration of said keys.

8. In a machine having a plurality of tabulator stops individually projectable for carriage arresting operations, means urging projection of said stops. parts individu-al'to said stops for normally blocking them against projection, means associated with said parts for operating them selectively to nonblocking position for projection by said urging means, means universal tosaid stops movable from one to another position to retract said stops, motor operable means responsive to the interception of the carriage by any projected stop to move said universal means from said one to said other position, and means to hold said universal means in saidother position at least pending the restoration of said keys.

9. In a machine having a carriage adapted to execute tabulating runs, a tabulator stop projectable for limiting tabulating runs, and normally ineffective means adapted to propel the carriage for tabulating; spring means tending to project said stop, means operable to and from a normal position respectively to eii'ect retraction of said stop, and to allow projection of said stop by said spring means, means operable to and from normal position to render said propelling means respectively ineffective and effective, a key, and means for power operating both said operable means conjointly from their normal positions to their operated positions in response to the operation of said key, and from their operated to their normal positions automatically in consequence of the carriage approaching the end of the tabulating run.

10. In a typewriting machine having a carriage member adapted to execute tabulating runs on a frame member, the combination with a stop element on one of said members, of a plurality'of denominational stops on said other member, individually projectable into tabulation controlling range with said stop element, and upon projection being slightly displaceable by engagement with said stop element during an ensuing tabulating run of the carriage, means acted upon when any denominational stop is displaced, and a power device common to all said stops and responsive to the said last means when acted upon, to retract automaticall any projected denominational stop.

11. In a ,typewriting machine having a carriage member adapted to execute tabulating runs on a frame member, the combination with a stop element on one of said members, of a tabulator stop on the other member projectable into tabulation controlling range with said stop element, and upon projection being slightly displaceable by engagement with said stop element during an ensuing tabulating run of the carriage, an electric motor, means acted upon by said tabulator stop becoming displaced, and means responsive to the said last means when acted upon, to cause retraction of the tabulator stop by the power of said motor.

12. In a machine having a carriage member adapted to execute tabulating runs'on a frame member, the combination with stop means on one of said members, of a stop on the other member projectable into tabulation limiting range with said stop means, power means including a constantly driven power device and actuator means transitorily connectable with said power device, to bring about the retraction of said stop,

and means to effect automatically a transitory connection of said actuator means with said power device in consequence of the carriage member approaching the end of its tabulating run.

13. In a machine having a carriag member adapted to execute tabulating runs on a frame member, the combination with a stop element on one of said members, of a tabulator stop on the other member projectable into tabulation limiting range with said stop element and upon projection being slightly displaceable by engagement with said stop element during an ensuing tabulating run of the carriage, power means including a constantly driven power device and actuator means connectable transitorily with said constantly driven power device, to bring about the retraction of said tabulator stop, and means acted upon by said tabulator stop becoming displaced to connect transitorily said actuator means with said constantly driven power device.

14. In a machine having a carriage adapted to execute tabulating runs, a stop projectable to cause interception of the carriage for terminating tabulating runs, means urging projection of said stop, operable means, means normally blocking said stop against projection and conditionable by operation of said operable means to allow projection of said stop, motor drive means conditionable for power-retracting said stop, and automatically operative means to condition said motor drive means for power-retracting said stop in consequence of the carriage apstops and responsive to the said element when it is acted on to cause automatic retraction of any projected stop by the power of said motor.

16. The combination with a typewriter, having a carriage member movable on a frame member, of a tabulating mechanism, comprising, a series of denominational tabulator stops, including one of lowest denominational order, abutting each other and supported on one of said members so that they are individually projectable into tabulation stopping range with said other member, and also so that the tabulation stopping engagement of any stop with said other member results in a displacement of the said lowest order stop on its supporting member, in a direction parallel to the carriage, means to project said stops selectively and to retract them automatically following tabulation terminating engagement, including power means common to all said stops and responsive to the said displacement of said lowest-order stop to retract any projected stop.

17. In a typewriting machine having a carriage member. adapted for tabulating movement upon a frame member, the combination with stop means on one of said members, of a plurality of denominational stop blades supported on the other member and selectively operable to project stopping ends thereon into tabulation con-trolling range with said stop means, means for so swingably mounting said blades that their stopping ends are movable substantially in parallel to the direction of carriage'movement, said blades normally abutting each other near their stopping ends and said mountin means including spaced abutment means wherebetween said blades are restricted to swing limite-dly, means resiliently crowding said blades in such direction against said abutment means so that any projected blade is capable of receiving a limited swinging movement through tabulation terminating engagement with said stop means, and so that said crowding means is adapted to be acted upon by all said blades, and means responsive to said crowding means being acted upon, to retract any projected blade.

18. In a machine having a carriage member adapted to traverse a frame member, the combination with stop means on one of said members, ofa plurality of denominational stop elements on the other member disposed substantially in planes extending transversely to the carriage and movable to project stopping ends thereon into tabulation controlling range with said stop means, means for so mounting said elements as to render them displaceable at said stopping'ends by tabulation stopping engagement with said stop means, about locations distant from said stopping ends, means for resiliently urging individual projection of said stops, means associated with said stop elements in the region or the said locations to control selectively projection of said stops by said urging means, andmeans to retract any projected stop in response to its displacement by tabulation stopping engagement with said stop means. I

19. In a typewriting machine having a carrlage member adapted for tabulating movement on a frame member, the combination with a stop element on one of said members, of a plurality of tabulator stops on said other member individually projectable thereon into tabulation controlling range with said stop element, means rendering said tabulator stops projectable to positions from which they are displaceable through engagement with said stop element during tabulating movement of the carriage, said rendering means including means resiliently opposing said stops against displacement, means acted upon when any of said tabulator stops is being displaced, and means common to all said stops and responsive to the said last means beingnacted upon, to retract automatically any projected tabulator stop.

20. In a typewritin-g machine having a carriage member adapted for letter-feeding and tabulating movement on a frame member, the combination with a stop element on one of said members, of a plurality of tabulator stops on said other member individually projectable into tabulation controlling range with said stop element, means constantly tending to impart tabulating movement to said carriage, letter-feeding means normally in control of the carriage, means to release said carriage from the control of said letter-feeding means concomitantly with the projection of any one of said tabulator stops, wherefore said carriage tabulates when any tabulator stop is projected, means for so mounting said tabulator stops that any one upon projection is yieldingly displaoeable by engagement with said stop element as they cooperate to intercept the carriage, means acted upon when any of said tabulator stops is displaced, and means common to all said tabulator stops and responsiv to the said last means when acted upon, to retract automatically any projected tabulator stop and to restore said carriage to the control of said letter-feeding means.

21. In a typewriter having a plurality of tabulating stops individually projectable for arresting a carriage in ensuing tabulating runs; spring means adapted to project said stops, key-operable means selectively operable to block all but desired ones of said stops against projection, a member common to all said stops, movable to a certain position to retract said stops, means for releasably detaining said member automatically whenever moved to the said position. said detaining means being responsive to each operation of said keyoperable means to free said member, whereby said stops become selectively projected upon operation of said key-o erable means, and means responsive to the conclusion of each tabulating run, to power-move said member to the said position.

22. In a typewriting machine having 'a plurality of tabulating stops individuallv projectable for arresting the carriage in ensuing tabulating runs; spring means adapted to project said stops,

operative connection between said conditionable means and said latch means to release the latter upon conditioning of the conditionable means, whereby said stops are selectively spring projectable, a rotary drive element, actuator means adapted by transitory engagement with said drive element to impart a stop-retracting movement to said member, and means responsive to the completion of each tabulating run to transitorily engage said actuator means with said element.

23. In a typewriting machine having a carriage member movable on a frame member, the combination with stop means on one 01' said members, of a pluralit of tabulating stops mounted on the other member for individual projection into tabulation terminating range with said stop means, means constantly urging projection of said stops, means movable oppositely respectively, to allow projection of said stops and to retract said stops, means to hold said movable means upon stop retracting movement, means selectively conditionable to block all but desired stops against projection, means operable to condition said last means selectively and concomitantly to release said holding means, said movable means being then freed and a desired stop becoming then projected,

said actuator mechanism for transitory stop-retracting operation by said power member.

24. In a typ-ewriting machine having a carriage member movable on a frame member, the combination with stop means on one of said members, of a plurality of tabulating stops mounted on the other member for individual projection into tabulation terminating range with said stop means, means urging projection of said stops, means movable from one to another position to retract said stops and conversely movable to free said stops for projection, normally idle power means for moving said movable means to said other position, means to hold said movable means in said other position upon movement thereto, said holding means being operable to free said movable means, but adapted tohold it again when it is subsequently again moved to said other position, means selectively conditionable to block all but desired stops against projection, means operable to condition said last means selectively and concomitantly to operate said holding means, said movable means being then freed and a desired stop becoming then projected by said urging means, and means responsive to tabulation terminating engagement of any projected stop with said stop means, to cause said power means to be effective to effect stop retraction.

25. In a typewritin machine, the combination with a carriage tabulating mechanism comprising, a tabulator stop, key responsive means to project said stop to tabulation controlling position, an electric motor, and means connectable with said motor to power-retract said stop, of means to connect said connectable means with said motor responsive to the carriage reaching a certain line-end defining position, thereby to cause automatic power-retraction of said stop.

26. In a machine having a carriage member adapted to execute tabulating runs on a frame member, the combination with stop means on one of said members, of a plurality of denominational stop elements on the other member disposed substantially in planes extending transversely to the carriage and movable-to project stopping ends thereon into tabulation limiting'range with said stop means, means for so mounting said denominational stop elements as to render them' displaceable at their stopping ends by tabulation limiting engagement with said stop means, about locations distant from said stopping ends, and power means including a constantly driven power device and actuator means connectable transitorily with saidconstantly drivenpower device through displacement of said stopping ends, to bring about a retracting movement for any stop element having its stopping end projected.

27. In a machine having a carriage member adapted to execute tabulating runs on a frame member, the combination with stop means on one of said members, of a stop on the other member projectable into tabulation limiting range with said stop means, a constantly driven power device, means transitorily connectable with said power device for operation thereby to retract said stop, and means to efiect a transitory connection of said connectable means withsaid power device in consequence of the carriage member approaching the end of each tabulating run, said transitorily connectable means including a lost motion provision to delay retraction of the projected stop until after the carriage has been arrested by cooperation of the projected stop with the stop means.

28. In a machine having a carriage member adapted to be tabulated across a frame member, tabulator stops, representing columns'supported on one of said members, a series of denomination selecting counterstops supported on the other one of said members and projectable individually into tabulation controlling range with said tabulator stops, means to impart tabulating motion to the carriage in response to projection of any counterstop, but effective to restrain the carriage placed counterstop willescape the encounteredtabulator stop in a direction opposite to said displacement, power means, retractor means for said counterstop movable from a normal to an operated position to allow projection of said counterstops and movable to said normal position to retract any projected counterstop, and means to cause said power means to move said retractor means from normal to operated position whenever any one of said keys is operated or is held operated while said retractor is in or arrives in tabulation controlling range with said tabulator stops, means to impart tabulating motion to the carriage in response to projection of any counterstop, and to restrain the carriage against tabulating movement whenever all said counterstops are retracted, means urging individual projection of said counterstops, tabulator keys, means for blocking said counterstops against projection, said blocking means being selectively operable by said keys to render any desired counterstop unblocked, said counterstops being supported on said other member in a manner to be limitedly displaceable by tabulation stopping encounter with any of said tabulator stops and so that upon retraction a displaced counterstop will escape the encountered tabulator stop in a direction opposite to said displacement, means, normally suppressing movement of said retractor means from normal position, under control of said keys, to free said retracting means for movement from normal to operated position whenever any one of said keys is operated or held operated while said retractor is or arrives at normal position, normally ineffective power means, and means to render said power means transitorily effective to move said retractor from operated to normal position responsive to the displacement of any projected counterstop by encounter with any of said tabulator stops, whereby repeat tabulation can be obtained by sustained operation of any of said keys.

30. In a typewriter having a plurality of tabulating stops individually rojectable for arresting a carriage in ensuing tabulating runs; spring means adapted to project said stops, key-operable means for blocking said stops individually releasable for projection by said spring means, power means normally blocking said stops collectively against projection, responsive to said key means to allow any selectively released stop to be projected by said spring means, and responsive to the termination of each tabulating run and also to the movement of the carriage to a line-end-defining position, to retract any projected stop.

31. In a typewriting machine having a, carriage member movable on a frame member, in combination, a tabulating mechanism comprising, stop.

and projecting and retracting means for said stop, said stop being projectable to a position from which it is displaceable on its supporting normal position, and to cause said power means member through tabulation terminating engagement with said stop means, said projecting and retracting means comprising, motor means, means associable with said motor means for operation thereby to retract said stop, and means responsive to displacement of said stop by said stop means to associate said stop retracting means for operation by said motor means, and means for asociating said retracting means and motor means also incidental to movement of the carriage to a line-end position, independently 01' said stop means.

32. In a typewriting machine having a, carriage member movable on a frame member; means to tabulate said carriage member to different positions, comprising, a projectable and retractable tabulating stop on one of said members, and norerable by the other member at the approach of the line end, and means operable through the said displacement of one of the said elements, adapted to render said, power means effective to retract the tabulator stop.

33. In a typewriting machine having a carriage member movable on a frame member, means for tabulating said carriage member to diiferent positions, comprising a tabulating stop on one of said members projectable to and retractable from a tabulating controlling position, transversely to the travel of the carriage, and displaceable on its supporting member in a direction parallel to the travel of the carriage, operable means, and means responsive to said operable means to project said stop, and responsive to said displacement of said stop to retract the latter, another stop on the other one of said members having a cam face so disposed that, when the carriage is in an absolute line-end Position, projection of the said tabulator stop will cause it to be cammed in the said direction, whereby, if the carriage is in said extreme line-end position, the said tabulator stop will be immediately retracted after projection.

34. In a typewriting machine having a plurality of individually projectable carriage-arresting stops; power means adapted to project said stops individually; and means operable to render said power means effective to project said stops, comprising, keys, a group of parallel motion devices, adapted for diiferent permutatorial operation by said keys, and means adapted by said permutatorial operations of said parallel motion devices, to select said stops for operation by said power means.

35. In a typewritin machine having a plurality of individually projectable carriage-arresting stops; spring means tending to project said stops,

and means blocking said stops selectively releasadapted by selective permutatorial actuation to jection by said spring means.

36. In a typewriting machine having a plurality of tabulating stops individually projectable to tabulation controlling positions, means urging projection of said stops, and means for selective- 1y controlling projection of said stops by said urging means and for automatically 'eflecting the retraction of said stops, said last means comprising, a plurality of blocking elements adapted by diflerent permutatorial actuation to block all but a desired stop against projection, and power means automatically responsive to the tabulating arrest of the carriage by any of said stops to retract such stop.

3'7. In a typewriting machine having a plurality of stops individually projectable for arresting a' carriage; spring means tending to project said stops, and means blocking said stops selectively releasable for projection by said spring means, comprising fewer blocking elements than stops, adapted by permutatorial actuation to release said stops selectively to th projecting influence of said spring means, tabulating keys distant from said blocking elements, an encased wire connection for each of the said elements extending to the proximity of the said keys, and a permutating mechanism operable by said keys to actuate the said elements permutatively through the said connections, so that upon operation of each key a different stop will become released for projection by said spring means.

38. In a typewriting machine having a plurality of individually projectable carriage arresting stops, means urging projection of said stops, means blocking said stops selectively releasable for projection by said urging means, comprising, a member movable from and to a normal position, respectively, to allow projection of said stops and to retract said stops, and a series of elements normally blocking all but a particular one of said stops against projection, being adapted by different permutatorial operations thereof to'block allsaid stops except a desired one against projection, means to effect different stop-selecting permutatorial operations of said elements and to concomitantly cause said member to move from its normal position, wherefore a desired stop will individually projectable for arrest of the carriage in difierent positions; power means for projecting said stops individually and for retracting them, means operable to render said power means selectively effective to project any'desired stop, comprising fewer elements than said stops,

' adapted by different permutatorial operations thereof to select any one of said stops for operation by said power means, and means to render said power means automatically eifective in consequence of the carriage approaching the end of its tabulating run, to retract any projected stop.

HARRY C. YAEGER.

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