US2364809A - Typewriting machine - Google Patents

Description

Dec. 12, 1944.

M. w. NEWBERRY' TYPEWRITING MACHINE Filed Dc. 31, 1942 6 sheets-sheet 1 INVENTOR gag: lll/Vewetg K De 12, 1944. M. w. .NEWBERRY 2 364,809

TYPEWRITING MACHINE Filed DEG. 31, 1942 6 Sheets-Sheet 2 RELEASE MARGIN SET LEFT morn TAB. sT P SET MARGIN CLEAR 4M W ewetty Dec. 12, 1944. M. wjNEwBERRY TYPEWRITING MACHINE 6 Sheets-Sheet 3 Filed Dec. 31, 1942 Qlw Dec. 12 1944. M w N Y 2,364,809

TYPEWRITING MACHINE Filed Dec. 31, 1942 s Sheets-Sheet 4 ATTORNEY Dec. 12, 1944. M. w. NEWBERRY TYPEWRITING MACHINE Filed Dec. 31, 1942 6 Sheets-Sheet 5 @wwww INVENTOR J WWW/6222 Dec. 12, 1944. I w N Y v 2,364,809

TYPEWRITING MACHINE Filed Dec. 31, 1942 6 Sheets-Sheet 6 I NVENT OR Meaj hl/Vewezzy ATTORNEY Patented Dec. 12, 1944 UNITED. STATES PATENT OFFICE TYPEWRITING MACHINE Meigs W. Newberry, South Windsor, Conn., as-

signor to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Application December 31, 1942, Serial'No. 470,880 18 Claims. (01. 197 -63) This invention relates to carriage stop mechanisms for typewriting machines, and has reference more particularly to a combined margin gaging and tabulating mechanism having keysettable stops.

One of the objects of the invention is to provide an improved carriage stop'mechanism having provision for both margin gaging and tabulating and employing only a single series of keysettable stops adaptable to gage the typing line margins and define the tabulating columns.

In providing a carriage stop mechanism in typewriters, adapted for both margin gaging and tabulating and employing only a single series of key-settable stops, the principal problem arising is that of devising a mechanism which will distinguish between stops set for gaging the margins and stops set to define tabulating points, as well as distinguishing between the left and right margin stops. In certain mechanisms heretofore proposed, this difliculty has been obviated by employing non-uniform or diiIerently shaped stops for defining, respectively, the left andright margins, of which the patent to Dobson, No. 2,196,790 is typical. Other mechanisms have answered this problem by setting the stops which, in such instance, are uniform, to three difierent positions to define, respectively, the left and right margins and the tabulatingpoints, of which the Austrian patent to Reiszer, No. 96,175 is an example. Still further mechanisms have been proposed in which the stops are set to corresponding positions to define each of the margins, and are set to a difierent position or extent of projection to define the tabulating points, as shown in the patent to Demmel, No. 2,247,014. These proposed mecha- Y nisms have, among others, the objections of the higher cost of manufacture in providing difier ently shaped or difl'erently settable stops, and

present invention is to provide a combined margin-gaging and tabulating mechanism in which only a single series of key-settable stops is employed and in which the stops are identical and .are set to corresponding efiective positions aligned with each other, that is, each of the stops is set to the same position with respect to its support whether set for defining the typingline margins or the tabulating points.-

Another object is to provide a carriage-stop mechanism including a series of uniform, settable stop members which, when efiectively set for any function, assume corresponding positions coextensive with each other, which mechanism will cause arrest of the carriage at one marginal point defined by certain set stop members, only while the carriage is moving in one direction, and will cause carriage arrest at another marginal point defined by other set members, only when the carriage is moving in the opposite direction, although one or more additional stop members may be set to define a number of tabulating points as well.

More specifically, an object is to provide a margin-counterstop mechanism for cooperation with the effectively set stop blades, all of which are arranged at letter-space intervals in a single series and assume. identical positions when set, which mechanism will allow a single set .stop

blade to pass without interrupting carriage travel but will arrest the carriage upon passage of a pair of blades set at a certain relation to each other.

A further object is to provide a margin-gaging mechanism including a single series of identical letter-spaced blades settable to corresponding positions, including counterstop means adapted to arrest carriage travel in one direction, only upon coaction therewith of a pair of stops set at a certain space relation, and adapted to arrest the carriagewhen moved in the opposite direction, only upon coaction therewith of a pair of blades of a certain, diiierent space relation.

A further object is to provide carriagearrest-' ing means, including a single series of settable ring only at the respective positions assumed by the carriage when the individual stops were set. Another object is to provide,,in a carriage-stop mechanism of this character, an improved means for setting the stop members of the series' in various combinations 'to function respectively as stops of three different purposes, the set stops} being distinguished from each other by being made up of either one or a pair of said members and further by having the pairsof members at difierent spacings, the setting means including only three stop-actuators and mechanism for operating these actuators in different combinaaway to facilita'telllustration;

tions to accomplish each of the three settin operations by actuating an appropriate key.

A further object is to provide, in a mechanism of the character indicated using a single series of stops settable to identical positions for any of the three functions, an improved line-end signal or bell-ringing mechanism which is actuated so close to an adjacent set stop that the two stops, if so set, would simulate a margin stop and wouldrthus operate to arrest the carriage at that point as though it were a selected margin instead of a tabulating point.

Other objects will hereinafter appear. In each of the two embodiments of the invention illustrated, a series of settable stop blades are arranged at letter-space intervals on the carriage and when set assume corresponding positions in alignment. The stop blades are set either singly to define a tabulating stop or in pairs to define each of the margin stops. The

two blades of the pair for one margin are differently spaced from each other than are the two blades of the pair for the other margin; Margin counterstop means is provided which includes sensing devices capable of distinguishing the various set stops one from the other according to their intended function. That is, the margin counterstop means operates in such manner 5 that, although all of the set stops come into coaction therewith, the tabulator stops will be allowed to pass by without interrupting carriage movement and one of the margin stops will be arrested during travel of the carriage in one direction, and the other margin stop will be arrested during carriage travel in the opposite di-- rection. The margin counterstop means is arranged to allow each margin stop to move past it in the direction opposite that in which the stop normally moves in'arresting the carriage, without interrupting carriage travel. This action takes place after margin release, while the carriage is being restored towithin the normal range of typing; the invention having provision for margin release which, when operated, allows the carriage to be moved beyond either margin point. A line-docking mechanism is provided to disable the? typing instrumentalities when the carriage assumesa certain letter feed position as definedby the line-end margin stop, this mechanism being ,actuatable only by said stop. The

novel line-e'hdsiEflfll-that is provided is so arranged thaifoifl the 'line-end-margin stop will lineend.

Inthedrawings. Figure 1 is: -a 1section al view through the typewriting machine embodying, the invention, taken on a fore-and-aft, vertical plane of the typewriter and showing the carriage stop mechanism in side elevation; illustrating one embodiment which the invention may assume in practice;

Figure'2 is a front elevational view of the carrlage stop mechanism shown in Figure 1, portions of thetypewriter being omitted or broken Figure 3 is an elevational view similar to Figure 2, but loolring at the rear of the machine;

actuate same to sigii'alfl'ie approach of a typing Figure 4 is a fragmentary front elevation taken on a vertical plane just to the rear of the margin counterstop mechanism and showing portions of the stop-restoring mechanism;

Figure 5 is a top plan view of the mechanism taken on a plane just below the typewriter platen and the stop rack;

Figure 6 is a fragmentary perspective-view illustrating a portion of the tabulating mechanism;-

Figure 7 is an exploded perspective view showing the parts constituting the left-hand margin counterstop;

Figure 8 is an enlarged front elevation of the margin counterstop mechanism in the condition assumed during the typing of a line within the margins;

Figure 9 is similar to Figure 8, but shows the mechanism in the operation of barring carriage travel at the left-hand or line-start margin, after returning the carriage to start a new typing line;

Figure 10 shows the operation of the mechanism during return of the carriage to within the line typing range, following margin release from the left-hand margin;

Figure 11 shows the operation nism when a tabulator stop is passing the left margin counterstop and when a left margin stop is passing the right margin counterstop. In this view, travel of the carriage may be presumed to be in either direction; I

Figure 12 is a fragmentary front elevational view similar to Figure 2, but'illustrating a second embodiment of the carriage stop mechanism which the invention may assume in practice;

Figure 13 is a fragmentary sectional view similar to Figure 1, but illustrating the second embodiment of the invention;

Figures 14, 15, and 16 are enlarged front views showing the margin counterstop means of the second embodiment in various phases of operation; Figure 14 showing the arrest of the carriage at the left margin or line-start position: Figure 15 showing the arrest of the carriage at right margin or line-end position of the carriage and Figure 16 showing the travel ofthe left margin stop leftwardly past the counterstop, in the instance of returning the carriage, after margin release, to within the normal line typing range.

Referring to the drawings, and particularly to Figure 1, the typewriting machine, in the two embodiments of the invention illustrated, has a carriage 11 supported on the main frame of the machine for line-typing and return movement by a carriage rail 18 moving on a trackway l9, and a guide rail 20 and cooperating roller. The typewriter may include the usual typing instrumentallties having keys, not shown, for actuating type bars 2| to strike a platen 22 on the carriage. The carriage is actuated in letter-feed direction by the usual spring drum, not shown, under control of an escapement mechanism 23. the wheel 24 of which may be geared to the carriage by a pinion 25 and a carriage rack 26. The

.carriage may. be advanced step -by-step in the mechanisms is suclsthat during each type bar stroke the carriage is advanced one letter space in line-typing direction so that the type characof the mechaters are successively imprinted in a typing line on a work sheet supported On the platen.

A series of stops or blades 34, identical in form, r

that illustrated herein being the arrangementv shown and described in the patent to Helmond N0.-2,l46,821.

In accordance with the invention, the sto blades 34 are set in different combinations according to the purposes for which they are intended, the various stops differing one from the other, either by the number of blades set (one blade for tabulating, two blades for margin gag-- ing) or by the spacin of the two blades of the respective stops from each other (one letter space apart for the left margin, and more than one, preferably three, letter spaces apart for the right margin, or vice versal In cooperation with certain counterstop means, hereinafter described, which include sensing devices to distinguish the various set stops, the single blade stops, having no companion stop blade, will operate only as' tabulator stops: the double stop blade or pair of blades one letter space apart will act only as a left-margin stop, and the pair of stop blades three letter spaces apart will act only as a right-margin or lineend stop. For clarity, the term tabulator st'op hereinafter used signifies a single set stop blade (without a companion blade) and is indicated at 34 in the drawings, and the termslidable members 40, one for each setter. The

upper portion of each member 40 is slidably guided in a plate 4| forming the top of a housing 42 secured to the main frame. Each setting member 40 is flexibly connected at its lower end to an intermediate lever 43 fulcrumed at 44 on a fixed bracket 45, see Figure 5. Each lever 43 has a spring 46 acting thereon to urge the corresponding setter 31, 38, 39 to its inactive or raised position. Individual key levers 41, one for each stop setter, are provided which reach forwardly to the region of the keyboard of the machineand are arranged to individually engage the corresponding levers 43. The arrangement of each train of setting mechanism 41, 43, 40 is such that,

upon pressing any one stop-setting key lever, the corresponding stop setter 31,38, or 39 is moved downwardly to engage and set the appropriate stop blade or-blades 34.

It is desirable to prevent the setting of two tabulator stops 34 as close together as three letter spaces in that two blades 34 set in this relation to each other would act as a line-end stop and would cause arrest of the carriage at a point other than the intended typing line limit. Ac-

cordingly, the invention provides a device, assomargin stop signifies a stop composed of two I blades set to define one of the margins, such as the left margin stop 34 or the right margin stop 34! Stop setting The mechanism for setting the stops is mounted on the main frame, in the embodiments shown. Accord ngly, the selection of a stop bladeor pair of blades to be set for any of the three purposes may be effected by appropriately locating the carriage at whatever letter-feed point it is desired to set the stop. The setting mechanism of the first embodiment shown includes three setters 31, 38, 33, one for each kind or function of stop to be set: these setters including arms extending over the series of stop blades in position to engage and set the blade or blades'aligned therewith. The setter 31. see Figures 2 and 3, is arranged to set the margin stop 34 determining the line-start or left margin and, accordingly. has its blade-engaging portionarranged to engage two adjacent stop blades 34 that are one letter space apart and thus, when set, constitute a left margin stop 34*. The setter 38 is adapted to set only the tabulator stops and, therefore, is arranged to engage only a single stop blade at a time to set it as a tabulator stop 34. The setter 39 provides for setting the right margin stop, for gaging the line end and for actuating the l ne-end signal and line-locking mechanism. -This setter comprises two arms three letter spaces apart and sets two stop blades 34 at a corresponding spacing to constitute a right margin stop 34.

As shown more clearly in Figs. 1 and 5, the setciated with the tabulator stop-setting mechanism, which prevents effective operation of this mechanism unless the blade 34 aligned with the setting arm 38 is at least five letter spaces away from the nearest set blade, whether thisv blade bea margin stop or another tabulator stop. This preventive device includes a feeler 50, see Figures 1 and 3. swingably mounted on a shaft 5| supported on the housin 42, said shaft forming an axis parallel withthe direction of carriage movement and allowing the feeler 50 to swing trans versely thereto. The member 40, carrying the tabulator-setting arm 38, includes a plate 52 in which a cam 53 is provided. A pin 54, projecting from said feeler 50, is arranged to cooperate with said cam.

As shown in Figure 5, the upper edge portion of the feeler 50 has a slot 55 which is in vertical alignment with the setting arm 38 and is amply wide to admit a single stop blade therein. From the slot 55, the feeler extends to each side an extent embracing four stop blades. The arrangement of the pin-and-cam connection 53, 34 is such that each time the tabulator-stop setting arm 33 is moved downwardly the feeler 50 is set, and thus occupies a range of four stop blades to each side of the tabulator stop-setting point defined by the setter 33. If any of the four stop "blades 34 in this range has been set, the feeler 50 comes into engagement with that set blade and its forward swinging is obstructed and thus the effective operation of the setter 33 is prevented. If, however, no set blades are present within the range encompassed by the feeler 53, the latter is free to move forwardly incident to the tabulator stop setting operation, and a tabulator stop is set to effective position, the same projecting into the slot 55 of the feeler.

To avoid damage to the parts of the tabulator stop-setting train, such as would result from a forceful operation of the corresponding key lever when effective operation is blocked by the feeler 50 engaging a stop already set, this mechanism provides a yieldable connection at the point bevte rs 31,38, and 39 are each carried on vertically tween the member 40 and the corresponding intermediate lever 43. At this point, a pin-and-slot connection is provided, a spring 56, Figure 3,.between lever 43 and member Making up the slack in the pin-and-slot connection. The spring 56 is amply strong to'be unyielding during the normal tabulator stop setting, but will yield upon being subjected to excessive force such as may be applied under the condition resulting when the feeler 50, engaging a set'stop blade, prevents the full actuation of the associated key lever.

counterstop means in general stops 34, and is, therefore, not engageable by any of the set stops unless it .is projected into the stop path incident to the tabulatlng operation, as hereinafter described.

, The margin counterstops are each arranged in the stop path, but are not effective to arrest the carriage unless acted upon by an appropriately related pair of stop blades, that is, by t e pair of blades set as at 34 for the left margin, or as at 34', for the right margin. Each margin counterstop is normally ineffective or disabled, and

each includes a device which conditions that counterstop for carriage arrest, only when acted upon by a particular set stop. Therefore, each counterstop will allow'the other set stops to pass by without interrupting carriage travel. For example, the left margin counterstop 51 will bar carriage travel only-when'the margin stop 34 moving rightwardly, comes into cooperationtherewith. Counterstop 51 will, however, allow.

- stop 58will allow the left margin stop 34 and the tabulator stops 34 to pass by, and will arrest the carriage only when acted upon by the right margin stop 34* moving leftward.

Margin counterstops It will be seen in Figure 8 that the left and I right margin counterstops each have substantially the same parts and are similar in construction and operating principle, differing only in certain respects hereinafter indicated. As shown best in Figure '7, each margin counterstop comprises, mainly, two interconnected members 60, 6| which cooperate directly with the respective corresponding margin stops 34 34. The counterstop member 80 acts as a stop dog or pawl and has a tooth 62 with an abrupt shoulder on one side and an inclined face on' the other side. The pawl 60 is pivoted intermediate its ends on a carrier member 63 by a stud 64 and has an angular opening 85 cooperating with a pin 68 on the carrier to limit the'fswin'g of said pawl. The" other counterstop member 6| serves as -a feeler or control member and is pivoted at one end thereof on the carrier 63 by a stud 61. A lug, at the end of pawl 60"opposite the tooth 82 engages a slot 69 intermediate the ends of the feeler iii and forms the interconnection between these members 80, 8|, The'free end of the feeler 8| presents a tooth 10 projecting toward the path of the stops and propath and inclined faces at each side thereof.

The two counterstop carriers 63 are pivotalll mounted on a common support 12 on which a stud 13 for each carrier isengaged in an inclined slot 14 thereon. A spring 15, connected to each carrier 63 belowthe pivot 13, yieldably holds each carrier in its, normal position with the lower end of each carrier engaging a stud 16. This mounting of the carrier 63 allows it to swing, un der certain conditions of operation, to either side of its normal Figure 8 position; that is, taking the left counterstop 51, for example, in one phase of operation the carrier 63 thereof may swing clockwise aboutpivot 13, allowing the members 60, 6|

to move rightwardly, as shown in Figure 9, and, in another phase of operation, the left carrier may swing oppositely, this time about stud 16 and thus allow the members 60, BI to move leftwardly, see Figure, 10. The angle of incline of slot 14 is relatively steep so that during this leftward movement of, members 60, 6|, the carrier 83 is cammed downwardly and therefore said members are caused to recede from the stop path in a sudden descent.

The support 12 is arranged for swinging leftwardly to a limited degree for the purpose of rendering efiective certain line-locking devices hereinafter described, and is also shlftable toward or fromthe stop path so that the margin counterstops 51,, 58 may be retracted from their normally raised positions to institute margin release. The support 12 extends downwardly and is articulated at its lower end to an intermediate lever 18 fulcrumed intermediate its ends at 44 on the bracket 45. A spring 19, Figure 5, tends to swing lever 18 clockwise, as viewed in Figure 2, thus yieldably holding the support 12 in its upper, normal .position. A margin release key lever 80 pivoted-intermediate its ends, has its rear end engaging the'lever 18. Pressing the margin release key lever down at its forward end shifts the support 12 downwardly and thus retracts the counterstops 51, 58 from the stop path to effect margin release.

The-upper portion of the support 12 presents two prongs 82, 83 between which a stud 84 on the plate 4| projects, forming a guide for the up-and-down sliding of said support and limiting its swinging movement. A spring 85, an-

' chored on the bracket 45, urges the support 12 rightwardly and yieldably holds said support in its normal lateral position defined by engagement of prong 82 with the stud 84 The prong 82 provides a stepped portionor shoulder upon which the pawl 60 of the left counterstop 51 may seat when said counterstop is shifted rightwardly, see Figure 9. The prong 83 provides a similar stepped shoulder on which the -pawl of the right counterstop 58 may seat when that counterstop is shifted leftwardly.

Margin gaging 80, BI is permitted as long. as pawl 60 is'clear of yiding a fiat face substantially parallel to said" the stepped shoulder on the corresponding prong 82 or 83, and occurs during the passing of any set stop'over the particular counterstop, except the particular margin stop that is set for carriage-arresting coaction with that counterstop. However, when the spacing of the two blades cincides with the spacing of the counterstop teeth 62, Ill, arrest of the carriage results.

The arrest of the carriage at the line-start or left margin, upon returning the carriage tobegin a new typing line, is demonstrated in Figure 9. It will be observed that the spacing of the tooth 70, of feeler 6| from the tooth 62 of pawl 60 corresponds substantially to the spacing (one letter space) of the two set stop blades forming the left margin stop 34 It may be said that when this spacing of the two counterstop teeth corresponds to the spacing of the pair of set stop blades, that counterstop is sensed or coordinated with that margin stop so as -to effectively coact therewith and thus arrest the carriage. This coaction results from the fact that as the leading stop blade of the pair engages pawl tooth 62, the retraction of the pawl is prevented by the reaction of the feeler 6|, the tooth 10 of which, tending to move upwardly, engages the trailing stop blade of the pair. as the blades of stop 34 engage counterstop 51 the counterstop members 60, 6|

maintain substantially their relative positions shown in Figure 8 and are thus caused to be moved en masse rightwardly as the carriage advances. This limited rightward movement is accommodated by the swinging of the carrier 63 about pivot 13 against the tension of spring I and ceases when the pawl 60 engages and seats on the stepped shoulder of prong 82, as shown in Figure 9. Thus, the pawl 60 is locked against receding from the stop path and the arrest of Stops passing counterstops Where the two blades constituting the margin stop are not at a spacing which corresponds with the spacing of the teeth 82, In of the counterstop, that margin stop will pass by the particular counterstop without interrupting carriage travel. In allowing a stop to pass by, the members 60, 6| of the margin counterstop oscillate in opposite directions and the teeth 62, thereon are accordingly moved up and down alternately. This tumbling action of members 60, BI is demonstrated in Figure 11, where, at the left portion, a tabulator stop 34 is shown passing-the left margin counterstop 51. Assuming'its motion to be rightward, the stop 3 having passed beyond the feeler tooth I0 is now causing the pawl 60 to recede from the stop path. The pawl 60 is free to recede under influence of stop 34 only because there is no companion stop blade to prevent the resultant rise of the feeler tooth 10. Assuming now that its movement is in the opposite or leftward direction, the stop 34 will first cam the pawl 60 downwardv and the fee'ler-Gl will conse-- 51 is substantially like that just described for 'stop 34'; that is, three letter spaces.

any pair of set stops of a lesser spacing, such as the single tabulator stop as in that the individual set blades of stop 34' will coact separately I with the members 60, 6| of the left counterstop 51, each blade coacting therewith the same as though it were a tabulator stop. As aforestated, the teeth 62, 1B of the right counterstop 58 are spaced apart a distance corresponding to the spacing of the stop blades of the right margin Therefore,

' the left margin stop 34 ,-will pass by the right Line locking As the right margin counterstop 58 causes arrest of the carriage, its pawl 60. is moved leftwardly until seated on the shoulder of prong 82,

substantially in the same manner as that shown in Figure 9 for the left margin gaging. Following this, however, additional movement of counterstop 58 takes place as afforded by the leftward shifting of the carrier support 12. The support 12 is shifted leftwardly until prong 83 engages the stud 81, which shifting actuates and renders effective the line-locking mechanism.

This mechanism is shown best in Figures 1 and 5 and includes a locking lever 86 pivoted at 81 and having its rear end portion enga ed in a slot 88 of theshiftable support 12. The for ward end of lever 86 terminates adjacent a lug 89 on the universal bar 21, being normallyfree of said lug to permit unencumbered vibration of the universal bar incident to the normal typing. When, however, the support 12 is shifted leftwardly incident to arresting the carriage at the typing line end, the lever 86 is thereby swung to locking position in which its forward end I abuts the lug 89 and obstructs vibration of the universal bar 21. Thus, the swing of the type bars is limited so that they will not strike the platen, and the type actions are thereby locked against effective operation.

Margin release operation When it is desired to type beyond either margin, release of the carriage for movement beyond the selected margin may be had by operating key lever to retract the margin counterstops 51, 58, as aforedescribed. Whenmargin release is required, the carriage is already at the margin beyond which typing is desired and, therefore, the corresponding counterstop 57 or 58 is at its carraige arrest position, held there by the engaged margin stop, againstthe tension of spring 15 (also against spring 85, in the instance of the right margin). Just before release from the left margin, the mechanism is in the condition-shown in Figure 9.. Operation of the margin release key lever 89 causes the support 12 to be pulled down and thereby retracts the margin counterstop from the stop path. As soon as tooth 62 of the effective counterstop is clear of the engaged margin stop blade, the entire counterstop will swing bodily to one side of stop 34 under the tension of spring 15, and will assume its inactive,-leftward position. Because of this immediate displacement of the-counterstop, key lever 80 may be released without first moving the carriage to the new position to avoid re-engagement of the stop 34 as has been the required practice with previous machines in releasing from the left margin.

Release of the carriage from the right margin, or line-end limit, operates in substantially the same manner except that the immediate return of the counterstop 58 to its rightward, inactive position involves the action of spring 85 as well as spring I5. That is, spring 85 causes the support I2 to be restored from its leftwardly displaced position and, in so doing, releases the machine from its line-locked condition by swinging lock lever 86 clear of the lug 99, Figure 5.

Line-end signal .ures 2 and 3, the line-end signal mechanism includes the usual bell 9I and a striker lever 92 both mounted on the main frame. The striker lever is pivoted at 93 on a bracket 94 and engages a limiting lug 95 which stops the lever 92 at a position in which its striking end is just clear of the bell. A spring 96, acting on lever 92 between the lug 95 and pivot 93, yieldably holds said lever in said inactive position. A slot in the lever 92 at pivot 93 allows the striking end of said lever to whip against the bell when said lever is released after being cocked preparatory to signalling the approach of the line end.

The upper portion of the striker lever 92 pivotally carries a tripper arm 91 which is yieldably held by a spring 98 in an upright position defined by a lug 99 on said arm engaging lever 92. Arm 9! swingably carries a tripper dog I which is adapted to distinguish the line-end stop 30 from the others and thus cause actuation of the striker-lever only when acted upon by said line-end stop, allowing the other stops 34 and M to pass by without operating the signal mechanism. This action is obtained by providing the dog I00 with two high points or teeth IOI at opposite sides of the dog pivot, each tooth having inclined faces receding oppositely from the high point. When the tripper dog I00 is in Y the level position shown, the teeth IOI thereof each project into the stop path a corresponding distance, but the valley or low point between the teeth is below said path. The dog I00 is sensed or coordinated with the margin stop 30* in that the teeth IOI of said dog are spaced one from the other a distance coinciding "with or substantially equal to the spacing of the two tooth which is blocked against being raised by The invention, however, provides an imengagement with the rresponding stop blade.

withlthe two blades':,, stop 34' thus engaged with the-tripperdog. I00, the carriage continues its letter-"feed .mcvemenhleftward as viewed in Figure 2, andfthe bell striker lever 92 is thus swung about its pivo ;93,'5during which arm 91 is maintained in its right position on the striker lever, by lug 99. Movement of the care riage'continues until the stop 34* rides oil the tripper dog I00, whence. lever 92 is released to strike the bell 9|. Whemthe stop 34 goes back.

over the bell ringing mechanism, moving rightwardly as viewed in Figurig, the two stop blades engage-the teeth of the dog in the same manner, but do'not operatelever 92 in that arm 91 is arranged to yield rightwardly. swinging about its pivot against the; tension of spring 98. As soon as stop 34 has-imoved a sufficient distance past the signal mechanism, the dog I00 is released and arm 91 resumes its upright condition. 25

The left margin stop 3 4 will pass by the signal mechanism withoiitl operating same, because the spacing of its-stop ,blades is lessthan the spacing of the dog teeth ;I 0I and will therefore engage only one'of saidj teeth at a time, causing the dog I00 to' merelygrock about its pivot as each of the dog teeth issuccessively engaged. The line start stop 34 thus pass by the line-end signal dog I00 in either direction of the carriage travel without {actuating the signal ,mechanism. The tabulator stops w will coact with the dog I-00 in substantially the same manner, engaging the teeth IOI successively and merely rockin the dog Without actuating the mechanism. In that no two tabulator stops may .be set closer than five letter spaces apart, two adjacent tabulator stops34 will coact with the signal dog I 00 individually.

'Tabulating mechanism By selective operation of the mechanism shown in Figure 6, the tabulator counterstop 59 maybe caused to function either as the counterstop in the tabulating operation, or may be operated either. to individually restore the tabulator stops El i or collectively restore them during a .run of the carriage. As shown in Figure 4, counterstop 59 is slidable up and down in the top plate 4| and at its upper end provides a face I03 parallel to the direction of carriage travel and an inclined cam.face I04. The face I03 serves in restoring the stops 34' individually, and the cam face I04 operates to restore said stops successively during a return run of the carriage.

when counterstop 59 is operated to serve in the tabulating operation, same is projected into the stop path by actuation of'a tabulator key lever I05 which also releases the carriage for a tabulating run under influence of its spring. Lever I05 is fixed on a; shaft I06 which is rotatably supported as shown in Figure 5 and has an upwardly reaching arm I 01 secured thereon which, as shown in Figure 1, is arranged to coact with the escapement mechanism 23, in the well-known manner, to free the escapement wheel 24, as by releasing the holding dog of said mechanism, and thus releases the carriage to a tabulating run. o Lever I05 is operatively connected to the tabulator counterstop 59 by an arm IIO, Figure 6,

which is articulated to said lever by a pivot III and a yieldable connection II2. This connection includes a dog 3 on lever I05, which engages 9. lug oi-arm IIO. A spring Illtensions arm,

H so as to hold the lug thereof against dog' H3, said spring also tending to restore lever I to inactive position. The connection H2 'is so arranged that it remains rigid when lever I05 is operated for tabulating, the swing of said lever during the depressing of its key being thus transmitted to arm H0. Said arm engages an oil'- set H5 at the lower part of counterstop 59 and forms a yieldable device H6 thereat including a spring I" interposed between arm IIO and offset H5. The connection H6 may yield when, in instituting a tabulating operation, the counterstop 59 is projected up under a set tabulator stop; the yielding avoiding restoration of that stop. The yielding at connection H6 allows the tabu ator key lever I05 to be fully actuated, so that same may institute a tabulatin run although counterstop 59 is not fully raised. The counterstop will, however, be urged upwardly by spring II'I until the engaged stop 34 will have moved beyond the counterstop, whence the latter 'will snap up into the stop path in readiness to intercept the next approaching stop 34.

When the counterstop 59 is used to individually restore the stops 34, same must-be projected forcefully, without yield, so as to overcome the resistance of the stop detent. To accomplish this, a second key lever I20 is provided, which is fulcrumed'interinediate its ends on the shaft I06 to swing independently of said shaft.

- The rear arm of lever I2 0 provides a slot in which the lower portion of counterstop 59 is disposed, said counterstopalso having a slot I2I through which the arm of lever I20 projects, thus forming a fiexibleand sliding connection between these members. A spring I22 restores lever I20 to quiescent position, assumed when said lever engages a limiting stud I23.

To restore all of the stops34 key lever I20 is operated and the carriage is released from letter-feed control by the usual means, it being assumed that the carriage is at the line-end or leftward limit. Manual pressure is maintained on key lever I20 and the carriage is manually moved rightwardly to the extent defined by the margin-gaging mechanism. During this carriage travel, each tabulator stop 34 rides up the for up-and-down sliding in the plate 4| and extends downwardly, being flexibly connected at its lower end to an intermediate lever I21, the opposite end of which is engaged by a sub-lever I28 pivoted at I29, see Figure 5. -A key'lever I30, having a margin-stop restoring key at its forward end, has its rear end fulcrumed at I3I it is clear of pin I35 on the restoring membercam face I04 on counterstop 59 and is thus restored to ineifective position in the stop rack. The restoring of the margin stops will not occur, in that travel of the carriage is limited to the range between said margins by coaction of the margin counterstops.

It willnow be seen that the key levers I05 and I20 and the associated parts, comprise means by which the member 59 may be operated to function either as a tabulator counterstop or a tabulator stop restorer. When operating the 'key lever I 20 for restoring a stop, the member 59 is projected into the stop path forcefully.

During this operation, key lever I05 remains stationary in thatthe connection II 2 yields to allow arm H0 to swin upwardly with member 59. Whenkey lever I05 is operated, key lever I20 remains stationary in that the provision of slot I2I allows member 59 to be raised without transmitting motion to lever I20.

Restoring margin stops member I26 for restoring the right margin stops 34'. The member I25 is guided at its upper end on the main frame. Intermediate the ends of lever I28, a pin- I32 is provided which engages in a slot of key lever I30. This train of levers .is so organized that upon depressing the key of lever I30, lever I28 is swung downwardly about its pivot I29 and causes the intermediate lever I21 to swing counterclockwise, as viewed in Figure 2, and thus raise the restorin member I25. It will be noted that the member I25 has a width at its upper end ample to engage only the two closely spaced blades of the stop 34 and is positioned directly below the point at which the stop 34 comes .to rest in gaging the lefthand margin. Upon operating key lever I30 with the carriage at the left-hand margin position, stop 34 will be restored to ineffective position.

The restoring member I25 serves also to actuate the member I 26, through a device which is normally inefiective but is rendered effective only when the carriage is arrested at line-end position; that is, only when the margin counterstop 58 and support I2 have been shifted rightwardly, as viewed in Figure 3, incident to gaging a right margin. As shown best in Figure 3, the counterstop supporting member 12 has a pivot I34 engaging in a slot of member I26, by which said member is arranged for pivotal and endwise movement on the support 12. The restoring member I25 has an arm carrying a pin I35 pro- J'ecting into the plane of member I26 which has a notch I36 at its lower end into which said pin may seat. A spring I37 pulls the restoring member I26 downward and yieldably resists swinging of said member, maintaining it normally in the inefiective position shown in Figure 3, at which I25. Thus, member I25 may beoperated to restore the stop 34 without actnatingmember I 26.

-When, however, the carriage at line-end position and the counterstop supporting member I2 has accordingly been shifted rightwardly, as

viewed in Figure 3, this shifting, translated through pivot I34 to member I26, causes same .to rotate slightly and thus assume the position shown in Figure 4, in which notch I36 is disposed in the path of pin I35. Under this condition, when the margin-stop restoring lever I30 is operated, the consequent raising of member I 25 will also raise member I 26 and thereby restore the two blades constituting the right margin stop 34 As soon as said stop is restored and the corresponding counterstop 58 is consequently released, the support I2 resumes its normal position. The resultant return or member I26 to the Figure 3 position renders the device I35,

I36 again ineffective.

Relative arrangement of stop setters and counterstops face I03 of counterstop 59. This arrangement is desirable in prder that, after the tabulating operation, the stop 34? is brought to rest at the exact letter-feed point at which said stop was set. After being arrested by engagement with the right side edge of counterstop 59 following a tabulating run of the carriage, and after the 34 will come to rest directly over the restoring face I03 of the counterstop,-which position coincides with that at which the stop was set.

In the embodiment of the invention first described, the left andright margin counterstops 51, 58 are spaced from each other in the direction of carriage travel a minimum distance sufficient to accommodate the associated parts arranged therebetween; particularly the supporting member 12 with its prongs 82, 83. As previously described, these margin counterstops each move through a limited distance from their inactive positions before becoming effective to arrest the carriage; that is, in actual carriagearresting position, the corresponding margin stops 34 34 are somewhat beyond their inactive positions at which they first engage their counterstops. Accordingly, the two margin stop setters 31, 39 are each arranged to set the corresponding margin stop' at the position in the range of carriage travel at which that stop will have been arrested in gaging that margin, Second embodiment of the invention Reference is now made to Figures 12 to 16,

inclusive, for a description of the modified form or second embodiment which the invention may assume in practice.

This embodiment also has the series of identical stop blades 34 arranged on the rack 35 for setting to an effective position, the set blades being in alignment with each other along the carriage. Also, the set stops are distinguished one from the others, according to the purposes for which they are intended, by being set in different combinations or permutations;' that is, a single stop blade is set to function as a tabulator stop 34, in any desired number, two stop blades a certain letter-spacing apart represent a left margin stop 34 and two stop blades a different letter-spacing apart represent the right margin stop 34. the right margin stop 34 has its blades only one letter space apart and the left margin stop 34 has its blades two letter spaces apart; a slight variation from the arrangement chosen in 'the first form. v

It may be here noted that to modify the mechanism ofeither embodiment so as to employ a different prescribed position-relation of the stop blades of the respective margin stops, or to vary the order in which the several different stops may be set up on the carriage, is largely a matter In this second form, however,

Margin-counterstop means of second form The margin-counterstop means of the second inventive form includes a toothed wheel I40 gular spacing of the tooth sets, so that when the wheel comes to rest, the teeth thereof always assume a corresponding orientation, with one of the tooth sets uppermost. To control the degree of intermittent rotation, a detent device is provided, having a four-sided cam I42 arranged to rotate in fixed relation with the wheel I40. A detent roller I43 .is carried on an arm I44 pivoted at I45 on the support I lI, a spring I46 acting on said arm to press the roller I43 into det'enting coaction with the cam I42. The arm I44 also carries a pin I41 arranged to function as a check dog in cooperation with cam I42 so as to augment the action of roller I43 in preventing overthrow of the toothed wheel I40. As Y the cam is rotated by'the coaction of a stop with the toothed wheel, the resultant movement of the roller I43 causes the check dog I41 to closely follow the contour of the cam as same is rotated. v

The supporting member MI is so mounted that the toothed wheel I40 may shift laterally in either direction of carriage travel a limited distance, incident to arresting the carriage, or may be retracted from the path of the stops to effect margin release. This mounting of support I4I comprises a bracket I48 secured to a stationary part of the typewriter and providing a pivot I49 for a lever I50 articulated by a' pin-and-slot connection I5I to the lower end. of the support I4I. A stud I52 on bracket I48 acts both as a rest and a pivot for support I, and a spring I53 pulls on said support to yieldably hold same against the stud I52 and with the. lower end-of the support at the rightmost limit afforded by the connection I5I. wardly by coaction of the stops therewith, the support I4I swings about the pivotal connection -I5I, and when shifted rightwardly said support swings on stud I52 as its lower end shifts at connection I5I; the shifting in either direction being against the force of spring I53. The lever I50 forms part of the margin release mechanism which also includes akey lever,-not shown, and

of arbitrary selection and are variances well within the scope of the invention.

The primary difference in this form from the embodiment first described resides in the organization of the counterstop means that has to do with the margin gaging. In thatthe margincounterstop means of this form operates to arby which the wheel I40 is retracted to a position wherein its teeth are out of the stop path.

Each set of teeth on wheel I40 includes a stop-intercepting tooth I55 and two sensing members together forming a tooth I56, the latter having. two oppositely inclined, angular faces I51, I50, see Figures 14 and/1'5; The detent I42, I43 brings the-wheel I, to rest with one of the interceptor teeth projecting upwardly into the path of the stops. The spacing of each I of the faces I51, I58 from the adjacent stop- -engagin g face of the tooth I55 determines the manner in which the wheel I40 coacfs with a particular stop engaging same; that is, this spacdetermines whether the stop will be arrested or allowed to pass by. Accordingly,

When the wheel I40 is shifted left-' the tooth face I! is spaced from the left face or the interceptor tooth I55 a distance substan-' tially equal to the spacing of the two blades constituting the left margin stop 34 see Fig. 14.

Similarly, the face I58.is spaced from the right face of the interceptor tooth I55 an amount aptooth I55 are at a level just below the bottom ends of the set stops, clearing the stops so as to allow the leading blade of the corresponding margin stop to pass over it and engage the interceptor tooth I55.

C'oactz'on of stops with margin counterstop means As afore-indicated, the toothed wheel I40 is yieldably held in a medial lateral position by spring I53 and the associated mounting, and maintains this position during thepassing by of the various stops, which passing causes the wheel to be rotated, see Figure 16. However, when acted upon by one of the margin stops moving in a certain direction, the registry of the stop blades with the wheel teeth I55, I56 prevents rotation of said wheel. Although interception of the stop by tooth I55 tends to turn wheel I40, and this tendency presses tooth I56 upwardly against the trailing stop blade, tending to restore that blade to ineffective position, the stop-detent resists restoring the blade and this resistance, plus the force of the wheel detent I42, I43, holds the wheel I40 nonrotative. Turning of the Wheel being thus prevented, said wheel propriate one of two shoulders I59 of a top plate I60 on the housing 42. Said shoulders are shaped to receive the wheel tooth I56 was to limit this shifting and also to positively prevent rotation of the wheel I40. The limits of wheel shifting, defined by shoulders I59, are determined with the intent of arresting the stops 34 and 34 at certain prescribed relative positions,

as hereinafter further explained. When the toothed wheel I40 is shifted laterally and engages the corresponding shoulder I59, it is thus locked against turning and arrest of the carriage results, see Figures 14 and 15.

It will now be seen'that the margin stop 34 travelling rightwardly will cause the arrest of the carriage at the selected left margin or line start; likewise, travel of the stop 34 leftwardly will arrest the carriage at the selected right margin or line end. The tabulator stop 34, how ever, coming into engagement with the counterstop wheel I40, will not cause arrest of the carriage, whether moving in one direction or the stop presents only one set stop blade. During-its travel past the wheel I40, the stop 34 engages the interceptor tooth I 55 and causes said wheel to rotate against the action of the detent I42, I43.

Wheel I40 continues to turn under influence of the travelling stop until said stop rides clear, at

which time the detent ca'm I42 will have turned to a position wherein its high point is past roller I43 and thus will complete, rotation of the wheel, bringing same to rest in a position with the next succeeding interceptor tooth I56 projecting into the stop path. A similar action occurs asthe carriage is moved into the'range between the .is caused to be carriedalong bodily with the moving stop, until the wheel engages the appoints A and B, respectively. The tabulator stop other, but will be allowed to pass by in that this three-blade zone.

margins following margin release beyond either margin. This action, occurring during the leftward, return travel of the left margin stop 34?, is illustrated in Figure 16. In that the spacing of the blades of this stop is greater than the distance between the right face of tooth I55 and the face I58 of the tooth I56, these stop blades will be out of registry with said teeth and wheel I40 will therefore be permitted to rotate, thus allowing stop 34 to pass by. Similarly, following release to beyond the right margin, during the rightward return of stop 34, said stop will pass by the wheel I40 as the latter is turned. The two blades of this stop, being only one letter space apart, will react with the teeth I55, I56 at that side of the counterstop wheel in the same manner as does the single-blade stop 34*.

Stop-setting mechanism of modified form are indicated in the several front, views by A, B, I and C, progressing from left to right.

It may be here noted that the two limits of shift of wheel I40, defined by the shoulders I59 are determined with the view to causing arrest of either margin stop within that zone, with each of he stop blades at a certain one of said letter-feed points. That is, in the instance of the left margin stop 34, Figure 14, the leftmost blade will'be at point A and the other blade will be at point C, and, in the instance of the right margin stop 34, Figure 15, the two blades will be arrested at 34", after interception by the tabulating counterstop I03 (see Figure 4 of the first form), will come to rest at the point A. Note that in any of the three instances one of the blades of the arrested stop is at the point A.

, The stop-setting mechanism provides three setting members I6I', I 62, I63, see Figure 12, the upper end of each of which presents a setting finger arranged to engage, respectively, the three stop blades that may be at the points A, B, and C. As shown in Figure 13, the setting member I6I extends-only part way downand has a stud I64 secured thereto which projects through a slot provided in each of the other setting members I62 and I63. The setting mechanism further includes an actuating member I also having a slot through which the stud I64 projects. The members I62, I63, and I65 each has anintermediate lever I66 individually connected to it, thethree levers I 66 being pivoted intermediate their ends, at I49 on the bracket I43. A key lever,

not shown, is provided to actuateeach interme-' diate lever. The arrangement of the train of levers for each member I02, I63, and I65 may be similar to that of the setting mechanism shown in the first form. A spring I61, Figure 12, yieldably holds the setting member m, and with it the actuating member I65, in the inactive or pulled down by operating its key lever, the stud I64 moves with it and thus pulls the setting member I H down. The stud I64 moves in the slots in members I62 and I63, and, therefore, these members are not actuated, but are held inactive by their springs. Thus, onty the setting member I6I is pulled down and only the blade at the let-. ter-feed point A is set, this single blade becoming a tabulator stop 34, It willbe further seen that a one of the members 162, I63 is actuated, the stop blade at the corresponding point, either'at B or at C, will be set. Actuation of either member I62 or I63, however, operating through stud I64, also pulls down member I6 I. It follows then that when member I62 is operated, a blade at point B will be set and, simultaneously, a blade will be set at point A; the two blades forming- "the stop 34'. It also follows that as member I63' is operated, a blade at point C is set and, simultaneously, a blade is set at point'A; the two blades forming the stop 34 Prior to each setting operaaoasoo vention in its entirety, that is, including right and left margin-gaging, tabulating, margin release with automatic restoration, stop-setting,

and stop-restoring mechanisms. It is to be understood, however, that certain of the mechanisms may be used in various combinations, omitting others, as may be desired. For example, an embodiment may provide for only margin aging at the two line-ends, and may exclude the tabulating devices; or it may combine the tabulating mechanism .with margin gaging for only the line-start or right margin, etc. .Further, while it is desirable to set the stops by a key-controlled mechanism operable from the keyboard of the typewriter, other means of setting the stops may be employed.

0f the two set blades constituting either margin stop, the first blade serves primarily as the margin gage, and the second or companion blade ation, of-course, the carriage is moved to the letter-feed position at which theparticular stop is to be set. t

As S wn in re i3,rthe"'tabulator setting mechanism of the modified form may include the preventive device -54 by which the setting of a tabulator stop 34 is prevented unless the stop blade 34, which is aligned with the setting member I6 I, is a certain number of letter spaces (more than three) away from the nearest set blade. The slot of the feeler 60, in this form. is in vertical alignment with the setting member I6I. 'I'he-feeler 50 is arranged to be swung into the region where the stops are set, by the coaction of the cam slot 53 with the pin 54 on said feeler. In this form, however, the plate 52 having the cam slot. forms part of the actuating member I66, which member is operated only when setting a tabulator stop 34. The operation of setting members I62 or I63, which cause the simultaneous actuation of setting member I6I, will not operate the preventive device in that member I66 the settings of the marremains inactive during gin stop blades.

Line lacking In this modification, the line locking mechanism maybe substantially the sameas in the first form, the locking lever 66 being arranged for actuation by the shiftable support III. when the toothed wheel I46 is shifted leftwardly tothe position shown in Figure 15, incident to gaging the right marginor line-end limit, the corresponding shifting of support Ill causes le-' ver 66 to lock the typewriter against operation.

\ Conclusion It will now be seen that the invention provides a carriage stop. mechanism adapted for both margin gaging and tabulating, in which only a single series of identical stop blades are used in which the blades, iwhen set for any of the'several functions, assume corresponding positions on the rack, in alignment with each other lengthwise or the." carriage. -'Ihis desideratum, aiIording use of a single stop rack 01' simple, light weight and durable construction, is made possible by the provision of the margin counterstop devices, the sensing means of which, although spirit'or the scope of the invention writer is that which identifies or characterizes the stop, firstly as a margin stop and secondly as either a leftor a right-hand margin-stop. That is, by its presence with th gaging blade, and also by its position-relation thereto, the second stop blade makes of the conibined blades a particular margin stop. Although it is preferable, for apparent reasons, to have that second or identitying stop blade on the same rack as the first blade, it is within the'scope oi the invention to arrange these two diflerently functioning elements on separate racks or supports,- if desired. Accordingly, the invention may be modified in these and other ways, and may be embodied in various other forms, without departing from its as defined in the appended claims. What is claimed is: 1. ,In a typewriter having two elements, one a frame and the other a carriage movable on the frame: mechanism providing for selection of carriag'e locations for effecting certain typewriter functions such as gaging margins, line-end signalling, line locking and tabulating; said mechanism comprising a-plurality of members on one of said elements, each adapted for setting to an spacing between the set members of respective groups; and means on the other said element, acting in response to coactionof one member group only, to effect. a certain one oi. the typections. '2. In a typewriter having two elements, one a frame and the other a carriage movable on the' frame; mechanism providing for selection of carriage locations for eflecting certain typewriter functions such as gaging margins, line-end sig- 1 nalling, line locking and tabulating; said mechanism comprising a plurality of members on being acted upon by all the set stops, are coordinated or sensed for carriage-'arrestingcoaction with only certain set stops moving in a certain direction.

i The embodiments herein shown present the inone of said .elements, each adapted for setting to an effective position, to present distinctive groups 01' set members i'or individually eflecting certain -ones oi the typewriter functions, the

groups being distinguished one from the others either by the number of set' members in the respective groups or by the spacing between the set members oirespective groups; and normally disabled means to effect a certain one of the a typewriter functions said means being arranged on the other said element for engagement by the eflectively set members and including a device, rendered effective by only one group or the set asagaoe members, to condition said means for operation. f

3. In a typewriter having two elements, one a framev and the other a carriage movable on the frame; mechanism providing for selection of carriage locations for eflecting certain typewriter functions such as determining the line-start, columnal and line-end positions of typing; said mechanism comprising a series of blades arranged at regular intervals on one of said elements and settable to corresponding eflective positions in alignment with each other, the setting of any of said blades in separate groups consisting of pairs of blades of one or another spacing between the blades or consisting of a single blade, affording distinction of the eflective set blades according to their intended, respective functions; and normally disabled means arranged on the other of said elements in the path of the eflective set blades, to efiect a certain one of the typewriter functions incident to carriage travel; said means including a device operable only by one of the groups of set blades, to condition said means for operation. I 1

4. In a typewriter having two elements, one a .frame and the other a carriage movable on the frame; mechanism providing for selection of cariage locations for eflecting certain typewriter functions such as determining the line-start, and

1 line-end positions of typing; said mechanism to carriage movement; said means including a pair of members cooperative with the eifective set blades and arranged for movement alternately into and out of the path of the'set blades, the

members of said pair having a spacing therebetween corresponding substantially to the spacing between the blades of the group by which said means is operable 5. In a typewriter having two elements, one a frame and the other a carriage movable on the frame; a combined margin-gaging and tabulating mechanism, including a plurality of members on one of said elements, settable to eiIective positions for cooperation with counterstop means,

- *any single set one of said members being adapted to define a tabulating point and any two set ones of said members set'in a certain position-relation being adapted to define a marginal limit; and normally disabled counterstop means on the other said element, arranged in the path of the set members and including a device, operable by the two members set in the certain position-relation, to condition the counterstop means to bar carriage travel only at the marginal limit.

6. In a typewriter having two elements, one a frame and the other a carriage movable on the frame, a margin-gaging mechanism, including a pluralityof settable members on one of said elements settable to eifective positions for cooperation with counterstop means, two of said memand normally disabled counterstop means on the other said element, including devices to condition the counterstop means to bar carriage travel in one direction or the other, depending on which two of the set members cooperates with the counterstop means.

7. In a typewriter having two elements, one a frame and the other a carriage movable on the frame; a carriage stop mechanismincluding a series of blades arranged at regular intervals on one of said elements and settable to corresponding eifective positions in alignment with each other, two pairs of said blades set to effective po-.

siti-on being adapted to define, respectively, the twomarginal limits of a typing line, the blades of each pair having a certain space interval andthe two intervals differing; and normally disabled counterstop means arranged on the other said element for cooperation with the set blades including means operative by the blades of one pair to condition the counterstop means to bar carriage travel in one direction and means operative by the blades of the other pair to condition the counterstop means to bar carriage travel in the other direction.

1 8. In a typewriter having two elements, one a frame and the other a carriage movable on the frame in'letter-space increments; a carriage stop mechanism including a series of letterspaced blades arranged on one of said elements and settable to corresponding eii'ective positions in alignment with each other, two pairs of said blades that are set and have the blades of each pair separated certain numbers of letter spaces, being adapted to define, respectively the two marginal limits of a typing line, the blades of the two pairs having separations of difierent numbers of letter spaces; and normally disabled counterstop means arranged on the other said element.

for cooperation with the set blades, including means operative by the blades of one pair to condition the counterstop means to bar carriage travel in one direction and means operative by the blades ofthe otherlpair to condition the counterstop means to bar carriage travel in the other direction.

9. In a typewriter having two elements, one a frame and the other a carriage movable on the frame; a combined margin-gaging and tabulating mechanism, including a series of members on one of said elements settable to corresponding eifective positions in alignment with each other lengthwise of the carriage for cooperation with counterstop means, two of-said niembers set at a certain space-relation being adapted to define one margin, another two of said members set at a different space-relation being adapted to define the other margin and any single set one of said members being adapted to define a tabulating point; and normally disabled counterstop means on the other said element, including devices, en-

gageable by the set members, to condition the counterstop means to bar carriage travel in one direction or the. other depending on which pair of set members cooperates with the counterstop means, said counterstop means also including a normally inefiective tabulator counterstop bars set at a certain position-relation being adapted to define one margin and another two of said members set at a different position-relation being adapted to define the other margin,

and manually operable means to render said tab ulator counterstop eiIectlve.

10. In a typewriter having two elements, one

a frame and the other a carriage movable on the frame, and a 1ine-locking device; a margin-gaging mechanism including a series of blades ,ar-

ranged at regular intervals on one of said elements and settable to corresponding effective positions in alignment with each other lengthwise of the carriage, a pair of said blades set with a certain spacing therebetween being adapted to define a typing line start; a second pair of said blades set to effective position with a different spacing therebetween being adapted to represent a typing line-end; and normally disabled counterstop means on the other said element, includingmeans, operative by the pair of blades set at one spacing for defining the line start, to condition the counterstop means to bar carriage travel in one direction, and normally disabled means to operate said line-locking device, including a device operative by the pair of blades set at the different spacing to represent the line-end, to condition said operating means for operation.

11. In a typewriter having two elements, one a frame and the other a carriage movable on the frame, and a line-end signal device; a margin-gaging mechanism including a series of blades arranged at substantially uniform intervals on one of said elements and settable to corresponding effective positions in alignment with each other lengthwise of the carriage, a pair of said blades set with a certain spacing therebetween being adapted to define a typing line start, a second pair of said blades set to effective position with a different spacing therebetween being adapted to represent a typing line 1 end; normally disabled counterstop means on the other said element, including means, operative by the pair of blades set at one spacing for defining the line start, to condition the counterstop means to bar carriage travel in one direction; and normally disabled means to operate said line-end signal device, including a device,

operative by the pair of blades set at the different spacing to represent the line end,.to condition the signal device operating means for operation.

12. In a typewriter having a frame and a carriage movable thereon; a combined margin-stopping and tabulating mechanism including a single series of blades on the carriage settable to corresponding effecting positions in alignment with each other, a left margin stop being formed of two set blades having a certain spacing apart, a right margin stop being formed of two set blades having a different certain spacing apart and tabulator stops being formed of single set blades; left margin counterstop means and right margin counterstop means on the frame, each including a stopping tooth member and a sensing tooth member and connections between said tooth members to cause them to be moved alternately into and out of the path of the set blades and transversely of said path, the spacing between the two tooth members of each counterstop means being substantially the same as the spacing of the two blades of-the corresponding margin stop; means mounting the counterstop means for limited movement bodily with the carriage; and means, effective after limited movement occurs, tolock said tooth membersagainst the transverse movement.

13. In a typewriter having a frame and a carriage movable thereon; a combined margin-stopping and tabulating mechanism including a single series of blades on the carriage settable to corresponding effective positions in alignment with each other, a left margin stop being formed of two set blades having a certain spacing apart, a right margin stop being formed of two set blades having a diflerent certain spacing apart stop to cause the associated two teeth to move alternately into and out of the set blade path, the spacing between the two teeth of each counterstop and its control member being substantially the same as the spacing of the two set blades forming the corresponding margin stop; means mounting each counterstop and its control member for limited movement bodily with thecarriage; and means, effective after the limited movement occurs, to lock the corresponding counterstop against movement from the set blade path.

14. In a typewriter having a frame and a carriage movable thereon; a combined marginstopping and tabulating mechanism including a single series of blades on the carriage settable to corresponding efi'ectivepositions in alignment with each other, a left margin stop being formed of two set blades having a certain spacing apart, a right margin stop being formed of two set blades having a different certain spacing apart and the tabulator stops being formed of single set blades; a wheel on the frame having a plurality of identical sets of teeth, each set including one stopping tooth and two sensing tooth members, one for each margin stop, one sensing tooth member having a spacing from the stopping tooth corresponding to the spacing 'between the blades of one margin stop, the other direction corresponding to that of the movement of the carriage.

15. In a typewriter-having a frame, a motorimpelled, letter-feed controlled carriage and means to release the carriage to motor-impelled travel; a tabulator mechanism includin a series of blades on the carriage individually settable from an ineffective positionto an effective position to define selective tabulating points; a member on the frame adapted to serve selectively either as a tabulating counterstop to arrest the carriage in cooperation with the set blades or as a restorer to return the set blades to ineffective position, said member being normally disposed out of the path of the set blades; means to positively project said member into said path; and means operable by said carriagereleasing means to yieldingly project said member into said path.

16. In a typewriter carriage stop mechanism having a row of uniformly spaced, settable blades, in which mechanism the blades may be set in various combinations to constitute difierent groups, the groups differing in the number of blades set or the spacing between the set blades of thegroup', means toset the blades selectively in any fof the variouseombinations, said means comprising at least three setting members, means, capable of selective operation in single strokes, to actuate said setting members selectively, and connections between said setting members and said actuating means to operate either a certain one, a certain two or another two of said setting members, according to said selective operation.

17. In a typewriter carriage stop mechanism having a row of uniformly spaced settable blades, in which mechanism the blades may be set in various combinations to constitute different on which one oi said keys is operated.

18. In a typewriter carriage control mechanism providing for selection of carriage locations for effecting certain typewriter functions such as determining the line-start, columnal, and line-end positions of typing, and having a row of settable blades arranged at regular intervals, the blades set to efiective position in distinctive groups, one for each typewriter function, defining the desired carriage locations, the groups each consisting of either a single blade or two blades at a certain slight spacing, means to set blades singly and to prevent the setting of a blade as close to an adjacent set blade as the certain slight spacing, said means comprising a, manually operable blade setter, a member having a gaging portion extending from the setter in at least one direction along the row of blades to a length exceeding the certain slight spacing, and means operable by said setter for moving the gaging portion of the member into the path of the set blades. MEIGS W. NEWBERRY.

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