US2196790A - Typewriting machine - Google Patents

Description

April 9, 1940.

w A. nosscN 2,196,790

TYPEWRITING. MACHINE I Filed Nov. 22, 1955 8 Sheefs-Sheet 1 ATTORN E April 9, 1940.

w. A. DOB SON TYPEWRITING MACHINE Filed Nov. 22,. 1935 8 Sheets-Sheet 2 ii n...

QATTQRN April 9, 1940; w, DQBSQN 2,196,790

TYPEWRITING MACHINE Filed Nov. 22,1955 8 Sheets-Sheet s INVENTOR wx/ ATTORN April 1940- w. A. DOBS'ON 2,196,790

TYPEWRITING MACHINE Filed Nofi- 22, 1955 a Sheets-Sheet 4 Fl id. w

iNvENToR I ATTORNEY 9, 1940. w, DQBSQN 1 2,196,790

' "TYPEWRITING MACHINE Filed Nov. '22, 1935 INVENTOR I ATTORNEY;

p 9, 1940- w. A. DOBSQN 2,196,790

TYPEWRITING MACHINE Filed Nov. 22 1935 I 8 She eis-Sheet 6 Ap 1940- w. A. bo soN 2,196,790

TYPEWRITING MACHINE Filed Nov. 22,. 1935 8 Sheets-Sheet 7 INVENTOR AW QRNE? p 1940- w. A. DIOBSON 2,196,790

TYPEWRITING MACHINE Filed Nov. 22, 1935 8 Sheets-Sheet B INVENTQR wa m ' By I; 1

ATTORNEY Patented Apr. 9, 1940 UNITED STATES PATENT orrlcs 2,196,790 -TYPEWRI-TING MACHINE William A. Dobson, Wethersfield, Conn., assignor to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Application November 22, 1935, Serial No. 51,097 25 Claims. (Cl. 19763) This invention relates to a combined margin and tabulator mechanism, and is shown .em-

bodied in an Underwood portable typewriting machine.

Stops of novel construction are employed for both margin controlling and tabulating.

The novel stop, when in one position, engages a margin counter-stop which may be provided at the center of the machine to limit the movement of the carriage in both directions, thus controlling the writing line-length.

Upon being displaced to another position, the novel combination stop engages a tabulator counter-stop. The use of the novel stop is thus alternative.

There is effected a substantial reduction in the number of parts and a saving in weight and cost over the application of separate margin and tabulator stop mechanism, especially to portable machine.

It is thus possible to obtain the advantages of both ordinary margin-regulating and columnar or tabulator work.

A conventional braking mechanism can be applied to the carriage of the machine to further reduce the strains on the light machine-framework.

discretion of the operator.

A rack pivotally mounted on the ends of the stop-shaft laterally letter-spaces the stops, and may also be utilized as a control guide in restoring the stops to their inoperative positions.

A margin-stop-set key and a tabulator-stopset key may set in motion a novel mechanism for rotating the selected combined stops to their margin or tabulating positions. The stops preferably engage a pair of marginal counter-stops, limiting the carriage movement in both directions.

A tabulator counter-stop may also be incorporated to engage the combination stops in their tabulating control position, when a tabulator key on the keyboard is depressed by the operator.

The mechanism will rotate the stops to either the margin or tabulating position, regardless of whether the carriage is in its normal or uppercase position.

Alternative types of novel combination stops are disclosed to accomplish this purpose.

Ina

preferred construction, the stops are pivoted on a cylindrical shaft mounted on the carriage of the machine. Depressing a margin-stop-set key provided on the keyboard of the machine, actuates a system of levers and control arms, which rotate the selected pivoted combination stop about the shaft until a portion of the bottom of the combination stop is in the range of one of a pair of margin counter-stops preferably attached to a lever mounted on the frame of the machine.

At the start of the writing line, one of the combination stops on the left side of the machine, angularly displaced into its margin-control position, as previously described, engages the right margin counter-stop, arresting the movement of the carriage and determining the left margin position of thewriting line on the worksheet. The left combination stop in its margincontrol position is so constructed as to by-pass the left counter-stop during the rightward movement of the carriage. When the carriage is letter-fed to the finish of a writing line, one of the right combination stops, rotated to its margin-control position by depressing the marginstop-set lever, as previously described, engages the left counter-stop, which is preferably either forwardly or rearwardly displaced from the right counter-stop, thus arresting the letter-feeding movement of the carriage and determining the finish of the writing line. At the end of the writing line the keys are locked in a known manner, the margin counter-stop lever cooperating in actuating the key-locking device. During the letter-feeding movement of the carriage, the right combination stop in its margin-control position is preferably arranged by novel means to by-pass the right counter-stop.

By depressing a tabulator-stop-set key attached to a lever, which may be operatively connected to the margin-stop-set lever, previously described, the selected combination stop, determined by the position of the carriage at thetime, is displaced through a small angle about the stopmounting shaft, so that the bottom of the stop is in the range of a tabulator counter-stop. When a tabulator-key on the keyboard is depressed, the tabulator counter-stop is moved into the path of the combination stop in its tabulatorcontrol position. The carriage-feed rack may be released in the usual manner, when a tabulatorkey is depressed, the carriage being rapidly pulled in the letter-feed direction by a conventional spring-motor, until the selected combination stop in its tabulator-control position engages the tabulator counter-stop, arresting the movement of the carriage to determine a tabulating position of a writing line.

A novel stop-rack may be pivotally mounted on the cylindrical shaft, to laterally space and guide the combination stops in some of their various positions. A. series of spring detents may beprovided to retain the stops in their margin or tabulator control positions, said detents being preferably mounted on the rear of the stop-rack.

The stop-control levers may be arranged to displace the stops into their operative positions, regardless of whether the carriage is in its normal or shifted position, by a novel mechanism consisting of a vertical stop-control lever which may be slidably and pivotally mounted on a shaft, pivotally. mounted on the shift-frame at one end, with theopposite end pivotally attached to the fixed machine frame, said lever remaining vertical. When the carriage is shifted the top of the stop-control lever is thus enabled to engage andangularly displace the combination stopin the same manner as when the carriage is in its normal position.

A stop-restorer lever or key may also be provided for rotating the stops into the range of a novel cam or other type of stop-restoring mechanism to rotate the stops to their inoperative positions, out of range of both the tabulator and margin counter-stops when the carriage is moved in the letter-feed direction by releasing the carriage-feed rack from the escapement mechanism by known means. The above stoprack may cooperate in this stop-restoring operation.

In an optional construction, a novel stop-rack, with a series of slots cut vertically, across the center of. the rack, and letter-spaced along its effective length, and a series of notches, in line with said slots, cut across the top and bottom of the rack, may be fixedly attached to the carriage. A series of novel combination stops of the sliding or optional type may be inserted in these slots in the stop-rack, with anovel longitudinal retainer or other suitable device slidably fitted within the rack to retain the combination stops in their respective slots in the rack and to limit the vertical movement of the stops in one direction. The stops may be slotted to provide a spring detent at one side, to frictionally hold the stop within its slot in the rack in some of its operative positions. A shoulder or other suitable means may also be provided on the stop to limit its vertical movement in one direction, the aforementioned longitudinal retainer limiting its vertical movement in the opposite direction.

The stop-control keys are similar to those previously described. When the margin-stop-set key is depressed, it actuates a novel stop-control slide through a system of levers, said slide 'de pressing the selected combination stop within a slot in the rack to the margin-control position where it may engage the corresponding margin counter-stop at the center of the frame, to limit the lateral movement of. the carriage in its respective direction and control the length and position of the writing line as previously described.

The combination stops on the right side of the rack are preferably slotted to by-pass the right counter-stop while in the margin-control position, duringthe letter-feeding movement of the carriage. The stops on the left side of the rack may be cut out or slotted to by-pass the left counter-stop when the carriage is moved-in the opposite direction. The right margin counterstop may be displaced either forwardly or rearwardly of the left margin counter-stop in order to enable it to engage the selected left combination stop in its margin-control position without interfering with the operationof the right combination stops.

Depressing a tabulator-stop-set key causes the stop-control slide to slide the selected combination stop downwardly in the rack through approximately half the distance required for margin-stop operation, into the tabulator-control position. When the tabulator key on the keyboard is depressed, as previously described, a novel type of tabulator counter-stop bracket, pivotally mounted on a shaft attached to the frame, may be rotated into its operative position, with a tabulator counter-stop finger, attached to said bracket in the path of the combination stops in their tabulator-control position, to arrest the movement of the carriage and determine an intermediate or tabulating position thereof.

A stop-restoring key on the keyboard is preferably provided to actuate a novel stop-restoring lever which may engage the bottom of the stops in either their margin or tabulator control positions, and, while the carriage is rapidly moved in the letter-feed direction as previously described, raise the stops within the slots in the rack to their inoperative positions out of range of both the tabulator and margin counter-stops.

Known types of line-end key-lock, line-end key-release and line-end signal may be utilized,

the combination stops in their margin-control positions and the margin counter-stop lever respectively co-operating in the control thereof. The conventional type of spring-motor driven carriage, carriage escapement, carriage-feed rack and rack release, as well as carriage-braking mechanism, may also be incorporated in the machine in the usual manner.

The entire construction of this unique device is light, compact, can be applied to a portable machine without altering its general construction, and is so simple in its operation that an operator of ordinary skill can utilize it to its full advantage, thus saving time in performing typewritten work requiring indentations cr columns of various kinds.

A modified type of combination stop may be incorporated, inwhich the stop is slidably fitted in a rack fixed to the carriage-end plates. A unique mechanism may also be provided for sliding these stops into one of several operating positions for engagement with either a margin or a tabulating counter-stop by depressing the appropriate control key on the keyboard. A stoprestorer key actuating a series of novel stoprestorer instrumentalities may also be utilized .to restore the stops to their normal or inoperative position, out of range of the margin and tabulator counter-stops.

A mechanism for locking the keys at the end of a writing line by the contact of the selected combination stop in its margin-control position with the corresponding margin counter-stop, as well as means for releasing said keys upon the disengagement of. said stop from said counter stop, may also be incorporated, the counter-stopsupporting lever co-operating in the actuation of said mechanism.

The usual line-end signal is preferably given when the carriage approaches the end of its writing line, the selected combination stop in its margin-control position actuating said lineend signal instrumentalities. A margin-release mechanism actuated either by a margin-release button at the front of the machine, or a key in the keyboard, may be incorporated to disengage the selected combination stop in. its margincontrol position by either throwing the margin counter-stop out of engagement with the combination stop, or by utilizing other suitable means, to extend the writing line beyond the established margin position.

Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a rear perspective view of a portable typewriting machine, showing a'preferred type of combined marginal and tabulating stops, said stops being pivotally mounted upon the shaft, and also indicating the margin and tabulator set keys, the stop actuating mechanism, and the counter-stops and the stop-restoring mechanism.

Figure 2 is a partial perspective view of the machine of Figure 1, showing the carriage-escapement-release mechanism.

Figure 3 is a perspective view of a portion of the shift-frame and carriage of the machine, showing the carriage-brake mechanism.

Figure 4-is a cross-section through the machine of Figure 1, showing the margin and tabulator stop set keys, the margin and tabulator stop actuating mechanism, and the pivoted combination margin and tabulator stops in their various operative positions, as well as the margin and tabulator counter-stops, in their relative positions with relation to the platen of the machine.

Figure 5 is a rear elevation of the machine of Figure 1, showing the stop-rack, the stopmounting shaft, with the stops pivotally mounted thereon, also the margin, and tabulator counter-stops, and the line-end signal mechanism.

Figure 5 is a fragmentary perspective view of the disassembled stop-control levers of Figure 5, showing the method of mounting the levers on the shaft.

Figure 6 is a rear perspective view of the stop rack of Figure 1, showing the pivoted combination margin and tabulator stops in various operating positions, together with the stop-restoring mechanism.

Figure I is a perspective of the escapement universal bar, showing a portion of the line-end key-lock mechanism;

Figure 8 is a cross-section of a portion of the machine of Figure 4, showing the position of the stop-control lever, with the carriage shifted to the upper-case position.

Figure 9 is a detailed cross-section of a portion of the machine, indicating the margin and tabulator'stop set keys in the tabulator-stopsetting position, and showing the pivoted combination stops, the stop-control mechanism and the tabulator-counter-stop in the tabulating position. t

Figure 10 indicates the mechanism of Figure 9 with the keys and stops set in the margincontrol position, showing the method of engagement of the margin-counter-stops with the pivoted combination stop.

Figure 11 is a partial cross-section of the machine, showing the stop-restoring lever in its operative position with the cam in operation, re-

storing the pivoted stops to their normal positions.

Figure 12 is a view similar to that of Figure 1, indicating a modified type of combined margin and tabulator stops in their various operative positions as well as the margin and tabulator stop set keys, and the stop-restoring key, with I their respective actuating mechanisms.

Figure 13 represents a partial plan view of the -machine-frame of Figure 12, indicating the method of mounting the stop-control slide.

Figure 14 is a rear elevation of the machine of Figure 12, showing the sliding type of com- ,bined margin and tabulator stops in their various operative positions, also the margin and ,tabulator counter-stops, and the line-end signal mechanism.

Figure 15 is a fragmentary perspective view of the carriage, indicating the method of mounting the tabulator-counter-stop for engaging the sliding combination stops in their tabulating position.

Figure 16 is a partial cross-section through the carriage of Figure 14, showing a sliding combination margin and tabulator stop in its tabulating position, and the method of its engagement with the tabulator-counter-stop.

Figure 17 is a partial cross-section through the machine of Figure 12, indicating the sliding 'type of combination stop in its normal or inoperative position, in relation to the margin and tabulator counter-stops, as well as the stopcontrol mechanism. V

Figure 18 is a fragmentary elevation of the machine of Figure 12, showing the stop-control mechanism and the sliding type of combination stop in the'tabulating position.

Figure 19 is a view similar to Figure 18, showing the stop-restoring mechanism in its operative position.

Figure 20 is a perspective view of the rack of the machine of Figure 12, showing the left and right hand combination stops in various positions, together with the margin-counter-stops and the tabulator-counter-stop for engaging said combination stops.

Figure 21 is a perspective view of the righthand margin-stop of Figure 20, indicating the stop-locating detent and the clearance slot for by-passing the right-hand counter-stop.

Figure 22 is a view similar to Figure 21, of the machine by the co-operating pairs of runways.

32, 33, anti-friction elements 34 being interposed between the carriage and frame runways. A revoluble platen 35 is journaled in the carriageend plates 36 and 31.

In a preferred embodiment of this invention, a channel-shaped stop rack 38, Figure 6, may be mounted by means of flanges 39 formed at its ends on a shaft 40, extending between the carriage-end plates 36 and 31, behind the platen 35, as indicated-in Figures 1 and 6. A pair of screws 41, threaded into the ends of the shaft 40, preferably secure the shaft and stop rack to the carriage-end plates. A collar 42 at each end of shaft is interposed between end plates 35 and 31 and the flanges 39 of the stop rack so as to laterally locate said stop rack.

and tabulator stops 43 and 44 may be pivotally mounted on the shaft 40, and slidably fitted into a series of letter-spaced slots 38 out along the effective working length of the bottom of the stop rack. Each set of stops occupies half the length of therun of the carriage. The stops of the lefthand set, designated by the number 43, areused for margin gaging when returning the carriage to a new line writing position. The right hand stops, designated by the number 44, are for gaging the right-hand margin when the carriage is running in letter-feed direction. The right-hand stops, also co-operate with end of line signal and key-locking devices as later described. Both sets of stops are also used for tabulating, the position into which a combination stop is set determining its use as a margin gaging or tabulating stop.

In order to set the combination stops in the margin-control position, a margin-set key 45 is depressed, a column 48 upon which said key is mounted moving'downwardly to the position indicated in Figure 10. A key-lever 41, pivotally connected to the column 46 by a screw 48, is angularly displaced about a pivot 49 to the position indicated in Figure 10, a shoulder 58 at the bottom of said column 48 resting against a shelf 5| on the base of the machine. A link 52, connected to the upper arm 53 of the key lever 41 displaces a lever 54 at the rear of the machine leftwardly on a shaft 55 journaled in a boss 58 and a bracket 51. A stop-control lever 58, mounted on the opposite end of the shaft 55; as indicated in Figure 5, is angularly displaced rearwardly to the position indicated in Figure 10, the top 59 of the lever 58 rotating the combination stop 44 about the shaft 40 to the margin-control position indicated in Figure 10.

To set the selected combination stops in the tabulator-control position, a tabulator-set key 68 is depressed when the carriage reaches the desired position in its lateral movement, angularly displacing the key-lever 41 about the pivot 49 to the position indicated in Figure 9, the angular displacement being considerably less than that shown in Figure 10 for margin-control operation. As previously described, the angular displacement of the lever 41 rotates the lever 54, thus rotating shaft 55 and moving the stop-control lever 58 rearwardly. The top 59 'of the stopcontrol lever engages a tip 8| at the bottom of the combination stop 48, rotating said stop about the shaft 40 into the tabulating position indicated in Figure 9. The angular displacement of the .combination stop from its normal position into its tabulating position, Figure 9, is substantially less than that of rotating it into its margin-control position, Figure 10. As indicated in Figure 9, the angular travel of the key-lever 41, pivotally attached by the screw 48 to the margin-set column 46, is limited by the contact of the extension 82 at the baseof the column 48 with the shelf 5| at the base of the machine.

Upon releasing the tabulator or margin stop set key, a spring 63, Figure 10, attached to the key-lever 41, returns said lever, and the keys 45 and 50 to their normal positions, another spring 15, linking lever 41 with the column 45, controlling the angular movement of the margin-set column.

The stop-control shaft 55 is normally mounted in angular relation to the axis of the platen, as indicated in Figure 5. The outer end of the shaft, loosely journaled in the boss 58 formed in the rear plate 85 of the machine frame, is fitted by means of a milled end 61 (Figure 5') into a correspondingly shaped slot 88 at the upper end 84 of shift-frame 3| of the machine.

of the lever 54 and riveted at 89 over said lever or fastened by other suitable means to form a permanent attachment. The opposite end of the shaft 55, substantially at the center of the machine, preferably has two parallel milled flats 18 6 slidably fitted into a correspondingly shaped slot 1| at the bottom of the stop-control lever 58, in such a manner that the lever 58 may retain its vertical position perpendicular to the platen of the machine regardless of the angular position of the shaft 55. Adjoining said stop-control lever, the shaft 55 is journaled in the bracket 51 attached to a plate 65, attached to the rear plate When the carriage is shifted upward by depressing the usual shift-key 13, Figure 4, the bracket 51 displaces the end of shaft 55 through the angle a to the position indicated by a dotted center line in Figure 5. The shifted position of the carriage is illustrated in Figure 8. The rotation of the combination stops 43 and 44 to the tabulating or margin control positions, indicated in Figures 9 and 10 respectively, is accomplished by the stop-control lever 58 in the manner previously described, regardless of whether the carriage is in its normal or upper-case position, as the lever 58 retains its vertical position with its upper end 58 engaging the tips 6! and 14 of the stops regardless of ,the position of the carriage.

A margin-counter-stop lever 15, Figures-1 and 6, formed with two margin-counter-stops 11 and 18 which co-operate with the previously mentioned combination stops to establish the right and left margins respectively, may be pivotally and slidably attached, by means of the screw and 35 higher than constant face 8| of counter-stop 18.-

To start the writing line, the carriage is moved rightward until a shoulder 82 at the bottom of the left combination stop 43 in its margin-control position, as previously described, engages the contact face 8| of the right counter-stop 18. As indicated in Figures 6 and 10, clearance is provided at the front of the combination stop 43 to by-pass the left counter-stop 11. The contact ofthe left combination stop 48 with the face 8| of the right. counter-stop 18 arrests the rightward movement of the carriage and determines the position of the beginning of the writing line.

The combination stops 44 on the right half of the rack are undercut as indicated in Figure 10,

to clear the right counter-stop 18 when the carriage is moved leftward. When the writing line is completed, a shoulder 88 of the right marginstop 44 engages the contact face 88 of the left counter-stop 11, limiting the leftward movement of the carriage and the writing line length.

The stops and 44 after being angularly displaced to any of the operative positions indicated in Figures 9 and 10 are retained in said positions by a series of letter-spaced spring-detents 84, either individually attached or formed by slotting a spring strip mounted onthe rear of the rear wall 88 of the stop-rack 38 by any suitable retaining instrumentalities as shown in Figure 5. The spring-detent84 is formed to engage a notch 81 near the top of the combination stop, retaining the stop in the margincontrol position, Figure 10, or the tabulatorcontrol position, Figure 9.

With the selected combination stop located in the tabulating position, as previously described, a tabulator-key 88, Figure 1, is depressed when a tabulating position of the writing line is desired, angularly displacing the tabulator-key lever 89 about a pivot 90 attached to the frame of the -machine. The angular displacement of the tabulator-key lever 89 rotates a bell-crank 9| about a pivot 92 at the bottom of the rear plate 65 of the frame by means of a link 93.

A link 94, attached to the free arm of the bellcrank 9|, rotates a bail 95, Figure 1, about 'a pair of pivots 96 on the rear plate 65 of the frame by means of an arm 91, attached to or integral with the lower arm'98 of the bail 95. The contact face I00 of the tabulator-counterstop lever I 0|, pivotally mounted on the shiftframe by a screw I02, is raised into the path of the combination stop by the leftward movement of the vertical arm I03 of the bail against an extension I04 at the lower end of the tabulatorcounter-stop lever IOI.

The leftward motion of the bail 95, through the intermediary of the bail finger IIO engaging an arm I I I of a bracket II2 pivoted to the carriageshift frame as by screw H3, and a tie-rod 99, Figure l. linking bracket II2 with a bell-crank I32, Figure 2, pivotally mounted to the shiftframe as at I32 rotates said bell-crank I32 rightwardly, so that a roll I32 freely mounted on a stud I32 fixed on the free end of bellcrank I32, will shift the carriage-feed rack I09 out of mesh with an escapement pinion I39 by swinging ears I31 outturned at the ends-of said impact of the contact of a combination stop 43 or 44 in tabulating position with the face I00 of the tabulator counter-stop lever IOI, the speed of the carriage travel is always kept under suitable control by automatically braking the pulling action of the spring motor I proportionately to its power. This'is accomplished by means of a releasable braking pad I06 of leather or other suitable material co-operating, when the tabulator-key 88 is depressed, with an incline or ramp I01 formed under the base-plate I08 of the carriage, as indicated in Figure 8.

The braking pad I06 is also actuated by th previously described action of the bail 95 and bracket II2.

As indicated in Figure 3, a spring I I4 and a link H5 connect the free end of the bracket II 2 to toggle links H6, H1. The lower link II6 of the toggle is pivoted on a stud II8 fixed to the rear plate 64 of shift-frame 3I, while its upper link H1 is pivoted on a pin II9 to the free endof an arm I20, pivotally mounted on saidshift-frame plate at I2I and carrying the braking pad I06.

counter-stop lever II" and the frame, withdraws the counter-stop contact face I00 from the path of the combination stops in their tabulating position. A spring I23, Figure 3, connecting the lower link II6 of the toggle to the plate 64, restores the link II6 to its normal position, releasing the brake-pad I06 from engagement with the ramp member I21 attached to the usual plate I28 which serves, by co-operating with a bar I28 mounted between the carriage-end plates, to prevent a rearward displacement of the carriage during the operation of the machine. All of the heads I29 of the previously set stops 43 and 44 are thus brought within the range of a cam I30 mounted substantially at the center of the rear of the machine on the plate I28. It is obvious that when the stop-rack 38 is turned to the Figure 11 position,'for stop restoration, it depresses said member I21 to turn the margin counter-stop lever 16, to thereby suppress the margin counter-stops 11, 18 to prevent the latter from interfering with said stop restoration; said member I21 engaging the flange 2I2 of said counter-stop lever 16.

Depressing a carriage-feed rack-control lever I35, Figure 4, pivotally mounted on theplatenshaft I36, angularly displaces a lug I31 attached to one of the carriage-rack ears I31, said lug slidably fitted in a yoke I38 at the bottom of said lever I35, thus raising the carriage-feed rack I09 out of engagement with the escapementpinion I39, the lug I31 rotating the rack about pivots I40. Upon releasing the carriage-feed rack, or letter-feeding the carriage normally, the spring motor I 05 draws the carriage leftwardly, the heads I29 of the stops being brought successively into contact with the cam I 30, restoring the stops to an inoperative position, indicated in Figure 4. With the heads. I29 of thefstops' in contact with the rear vertical wall 86 of the rack, the combination stops 43 and 44 are out of range of the contact faces SI and 80, respectively, of the margin counter-stops, as indicated in Figure 4, with the tips 6! and 14 of the stops outof range of the tabulator counter-stop contact face I00. A spring I4I, Figure 4, attached to the upper arm of the lever I35 restores said lever to its normal position, throwing the rack I09 into engagement with the escapement pinion I39 when the lever I35 is released, resuming normal letterfeeding of the carriage.

When lever I24 is released by'the operator, a torsional spring, I3I, Figure 6, carried on the collar 42, one end I33 of said spring being attached to the carriage-end plate 31 with the opposite end I34 of the spring attached to the lever I24, rotates the lever and the attached stop rack to their normal positions, indicated in Figthese levers with slidably contacting fingers I24- and I35 as indicated by dotted lines inFigure 4.

In the type-action fragmentarily indicated in Figure 4, depressing a character key I42 displaces a key-lever. I43 about a pivot I44 on an extension of the frame. A link I45 connecting the key-lever to a bell-crank I46 rotates said bell-crank through a small angle about a pivot I41, drawing the typecontrol rack I48, connected to the free end of said bell-crank, forwardly, thereby moving the typehead I50 toward the platen 35 about a pivot II by means of a gear-sector I52 at the hub end of the type-bar I53, said gear-sector meshing with the teeth I54 of the rack I48. A lever I55 pivoted to the upper end of the type-bar I53 may be connected to a momentum-accumulator mechanism, asdescribed in detail in Patent No. 1,908,140, issued to G. G. Going, May 9, 1933, to complete the movement of the type-carrier in approaching its writing position at the platen.

ating the carriage-escapement mechanism, is operated by the type-bars I53. A projection I51 at the heel of the type-bar I53 engages the top of arms I58 rearwardly displace the cross-bar I62 of a bracket I63, the vertical arms I64 of said bracket being pivotally attached at I65 to the bracket-arms I60. The rear face I66 of an escapement-dog-control bracket I61 pivotally attached to a lug I68 of the bracket I63 is displaced rearwardly against a stud I10, Figure 4, moving the escapement-dog I1I rearwardly into engagement with the escapement-wheel I12 to letterfeed the carriage, by known means utilized on the Underwood Portable typewriter. The face I66 of bracket I61 may be adjusted relatively to stud I by such means as a set-screw I69.

After the key I42 is released, the projection I51 at the heel of the type-bar releases the universal bar I56, and a spring I13, attached to the vertical arm I64 of the bracket I63, angularl'y displaces said bracket forwardly about the pivot I 65 until the vertical arm reaches the pin I6I, thus drawing the escapement-dog-control bracket I61 forwardly into its normal position, indicated in Figure 4, with the bracket face I66 out of engagement with the stud I10 attached to the escapement-dog I1I, permitting the rear escapement-dog I14 to engage the escapement-wheel I12 and in co-operation with carriage rack I09 and the spring motor I05 to letter-feed the carriage in the usual manner, as the typing operation proceeds.

Regardless of which one of the right combination stops 44 is selected for determining the right-hand margin, it is desirable that the usual signal be given as the carriage reaches a point the customary distance from the end of the writing line.v During the letter-feeding travel of the carriage, the tip 14 of the selected right combination stop 44 in the margin position engages a finger I15, Figure 5, pivotally attached to a striker-lever I16 in such manner as to permit only a rightward rotation of finger I15. Lever I18 is pivotally mounted on a screw I11, the opposite end of said lever terminating in a striker I18. When the stop, in its leftward travel, displaces the finger I15, the striker I18 is raised from a bell I80 at the right side of the rear of the machine, with which hell it is normally in contact, said striker-lever also normally resting against a pin I8I mounted in the bracket I82. As the stop 44 releases the finger I15, a torsional spring I83, connected to the striker-lever I16 A universal bar I56, Figures 4 and 7, for actu- I the frame.

and the bracket I82 at the pivot I11, depresses the striker-lever, swinging the striker against the bell and sounding the line-end signal.

In order that the line-end key-lock and keyrelease may function at the end of a line, regardless of the position of the right combination stop 44 adjusted for right margin-control operation, the counter-stop lever 16 is preferably arranged to co-operate in key-locking and keyreleasing, when the selected right margin-stop 4 engages the contact face 80 of the left counterstop. As the carriage continues in its leftward travel, the right combination stop 44 in its margin-control position moves the counter-stop lever 16 leftward by reason of the previously described slot and screw mounting of lever 16. A yoke I85, Figure 1, at the left end of the counter-stop lever engages the upper arm I 86 of a lever I81 pivotally mounted on the shift-frame plate 64 by a screw I88. The lower end of the lever I81 rotates a finger I89 through a small angle about a pivot-screw I90 attached to an extension of The angular displacement of the finger moves a link I 9I, pivotally connected to the rear of said finger by a pin I92, to the left.

The opposite end of the link I9I, Figure 7, connected by pin I93 to a universal bar locking lever I94, rotates said locking lever about a pivot I95, the front end I96 of said lever being pressed under a tongue I91 at the bottom of the universal bar I56 into the position indicated by dotted lines in Figure 7. The front end I 96 of the lever I 94 in engaging the tongue of the universal bar locks said universal bar in its upper position, restraining the projection I51 of the type-bar I53 from depressing the universal bar I56, thus preventing the type-carriers I50 from reaching the platen and thereby blocking the type-keys. 7

When the carriage is again moved to the right, to start a new writing line, the combination stop 44 releases the contact face 80 of the left counterstop. A spring I98, Figure 6, attached to a vertical arm 200 of the counter-stop lever 16, withdraws said lever rightwardly, the slot 19* permitting the lever to slide over the screw 19 to the normal position indicated in Figures 1 and 5, the yoke I85 releasing the upper end of the lever I81. A spring 20I attached to the rear end of the universal bar locking lever I94 willthen rctate said lever about thepivot I95 to the position indicated in Figure '7. The front end I96 of the lever I94 is thus brought out of engagement with the tongue I91 at the bottom of the universal bar I56, allowing the universal bar to be depressed and permitting the type-carrier I58 to reach the platen when a type-key is depressed.

When it is desired to extend the writing line beyond the established right-hand margin, a margin-release button 202, Figure 4, is pressed, and a tie-rod 203, extending from said button and pivotally connected at its rear end 204 to the bottom of a bell-crank 205, rotates said bellcrank about a pivot screw 206 througha small angle.

The upper arm 201, Figure 5, of the bell-crank 205 rotates the left end of the counter-stop lever 16 about the screw 19 until the upper face 208 of the counter-stop lever is arrested by contacting a shoulder 2| 0 at the top oithe vertical lever I81. The angular displacement of the counterstop lever 16 is sumcient to withdraw the constop 44 in the margin-control position. The

- writing can thus be continued beyond the cstablished margin position.

Upon releasing the margin-release button 202, Figure 4. a torsional spring 2, interposed between the upper arm 201 of the bell-crank and the shift-frame of the machine at the screw 208, rotates said bell-crank about the screw 286, depressing the horizontal arm 281 out of engagement with the free end of the counter-stop lever 16. The spring I98, connecting the vertical arm 20!! of the counter-stop lever to the bracket I82 mounted on the rear frame, withdraws sa d counter-stop lever 15 to its normal position indicated in Figures 1 and 5, with the counter-stop contact faces 8| and 88 in the respective paths of the combination stops 43 and 44 located in the margin-control position, thus restoring the originally established margin positions.

To limit the angular movement of the counterstop lever 16 about the pivot-screw 19, a flange 212, Figure 5. extending from the lower edge of the counter-stop lever, may be formed thereon for co-operation with a slot M3 in the plate 55 attached to the shift-frame 3| of the machine. When the counter-stops on the lever 18 are displaced upwardly, the top of the flange 2I2 may, if the angular movement of the lever is carried far enough, engage the upper edge of the slot 2l3, thus arresting the upward movement of the counter-stop side of the lever. In the downward movement of the counter-stops, the lower edge of the flange 2l2 contacts the lower edge of the slot 2|3, thus limiting the angular move- In incorporating a modified form of combination margin and tabulator stop, as indicated in Figures 12 and 14, a stop-rack 220 may be attached to the carriage-end plates 22l and 22h, by screws 222 or other suitable means, in a position similar to that previously indicated with reference to stop-rack 38.

Two types of combination stops, a right-hand stop 223, shown in detail in Figure 21. and a left-hand stop 224, shown in Figure 22, may be slidably inserted into letter-spaced slots 230, 23l out along the effective length of the rack, the width of said slots being substantially equal to the width of the stops. The right-hand stops 223 are preferably located on the right half of the rack 22!) with the left-hand stops 224 located on the left half of the rack.

The contour of the left combination stop 224 is substantially the same as that of the right combination stop 223, with the exception of a slot 225 out at the bottom of the right combination stop 223. to by-pass the right counter-stop 226, Figure 20, during the letter-feeding movement of the carriage, and the notch 221, out in the rear corner, near the bottom of the left combination stop 224, to clear the left counter-stop 228, during the rightward movement of the carnage.

The rack 220 consists essentially of a rectangular or other suitably shaped tube. A series of letter-spaced slots 23!! are cut through the top of the tube with a corresponding set of slots 23l cut through the bottom of the tube in 'line with said upper notches. These notches. extend transversely of the tube, each notch having parallel sides and extending entirely across the widthv of the rack. Suflicient uncut metal is left between the notches to join the sides 232 and 233 firmly to preserve the rigidity of the tube. The top slot 230, the companion bottom slot 23! combination stops 223 and 224, to limit the upward .movement of said stops. Each combination stop may be detained in any of its operative positions by means of a spring-detent finger 2, formed at the front of the stop as the result of cutting the longitudinal slot 240 close to the front edge of said stop. A pair of projections 242 and 243 are preferably formed on one side of the finger 24l to engage the adjacent wall of the slot 230 in the rack, restraining the movement of the stop in the rack. The finger 24! is generally bent slightly leftward, Figures 21 and 22, this inclination, together with the spring action of the finger and the projections 242 and 243, acting as a detent in holding the stop in its various operative positions.

The margin-control position of the combination stops, as 223, shown in Figure 20, is determined by a shoulder 244 formed near the top of the rear end of the stop which engages the bottom of the upper notch 230 of the rack. The inoperative position of the combination stops, illustrated in Figure 17, is determined by the contact of the bottom 245 of the slot 240 in the combination stop with the bottom face 246 of the stop-retainer 238.

In order to set any of the modified combination stops 223 or 224 in the margin-control position, the carriage having previously been moved to the desired position by the operator, 9. marginstop-set key 241, Figure is depressed, a margin-set lever 248, upon which said key is mount- 254 of the lever 248, engage the upper edges of a pair of projecting and vertically extending arms 255 and 255 extending from an adjoining tabulator-set lever 251. The vertical column 254 of the margin-set lever 248 is guided in its longitudinal movement by the co-operation of the side of the tabulator-stop lever 251 and the vertical extensions of arms 255'and 256 extending from said tabulator-stop-set lever.

When the tops of the slots 252 and 253 engage the upper edges of the projections 255 and 256. the tabulator-stop-set lever 251 is angularly displaced downwardly about a pivot-pin 260, attached to the side 26f of the frame. A tie-bar 282, pivoted at its front end to the lower rear end of the tabulator-set lever 251, by a screw 263, moves a bracket 264, attached to or integral with the rear end of said tie-bar, 'rea'rwardly, rotating a bell-crank 265, one arm of said bellcrank being pivoted to the bracket 254, by means of a slot 265 in the top of said bracket, said slot engaging ascrew 2611,, attached to said bell-crank arm. The bell-crank 265 is rotated clockwise about a pivot-screw 268, attached to the rear' 212 of a stop-control lever 213, angularly displaces the bottom of said lever leftwardly about stud 214, attached by means of a post 219to the rear plate of the shift-frame. As indicated in Figure 18, a heel 215 of the horizontal arm 216 of the stop-control lever 213 engages the top of the lower flange 211 of a stop-control slide 218, depressing said slide. A finger 280, depending from the upper flange 28| of the stop-control slide, engages the top of the selected- combination stop 223 or 224, depressing said stop until the shoulder 244, Figure 20, rests upon the bot-' tom of the upper notch 230 in the rack. The selected stops are thus located in the margincontrol positions indicated at A and B in Figure 14.

To set a selected combination stop for tabulator operation, a tabulator-stop-set key 282, Figure 12, is depressed, when the carriage reaches the desired position, angularly displacing the tabulator-stop-set lever 251 about the pivot 260. A horizontal projecting; arm 283, extending from said lever, engages a slot 284 out in an extension 285 of the frame of the machine, the sides of said slot 284 acting as a guide for the arm 283 during the downward movement of the lever 251. The angular displacement of the lever 251 by the tabulator-stop-set key is considerably less than that effected by depressing the margin-stop-set key, it being obvious that the extent of said displacement is determined by the arm 250 striking the front of the key-lever comb-plate. It will also be obvious that said projecting arm 283 of the stop-set lever 251 may co-operate to gage the larger displacement of said lever 251 for mar-.

gin-stop setting. As previously described, the heel 215 at the free end of the horizontal arm 216 of the stop-control lever 213 engages the top of the lower flange 211 of the stop-control slide 218, depressing said slide, the finger 280' at the top of the slide moving the selected combination stop 223 to the tabulating position C in- 1 dicated by solid lines in Figure l8. It will thus be apparent that the downward movement 'of the stop from its normal position, to its tabulatorcontrol position, is substantially one-half of that previously indicated for margin-control operation, although these positions may be varied considerably, depending upon the requirements of the design of, the machine. v

Asindicated in Figure 13, the stop-control slide 218-is guided in itslongitudinal movement by a pair of guide- plates 286 and 281, attached by screws or other suitable means to the rear plate I28 of the frame of the machine. The inner edges 288 of the guide-plates are beveled, as indicated in Figure 13, with corresponding bevels on the sides 289 of the slide 218, to guide and retain the slide in its longitudinal movement.

Upon releasing the tabulator-stop-set key, a spring 290, Figure 12, connecting the tie-bar 262 to a pin 29l, inserted in the frame-side 261, withdraws said tie-bar forwardly, raising the tabulator-stop-set lever 251 and the tabulator-stop-set key to their normal positions. A normally contracted extensible spring 292, connecting the top of the tabulator-stop-set lever 251 to the lower arm 250 of the margin-stop-set lever 248, raises said margin-stop-set lever to its normal position on said lever 251 when the margin-stop-set key is released. It will be obvious that said marginstop-set lever 248 may simply be hung on said ure 14, by a spring 293, the upper end of which is attached to the fixed stud 214, Figures 12 and 18, with the lower end slidably attached to a shouldered screw or stud 294 inserted near the bottom of the vertical arm 2-95 of the stop-control lever 213. When the bottom of the arm 295 of the lever 213 is displaced leftwardly by the movement of the margin or tabulator-stop-set keys, the spring 293 is distorted, in a similar direction as indicated in Figure 18. Upon releasing the stop-set keys, the spring 293 tends to resume its normal vertical position, returning the lever 213 to its normal position, indicated in Figure 14.

A torsional spring 299 carried around a screw 309 in the horizontal arm 216 of the stop-con- 'trol lever 213, and having one end inserted in or otherwise engaging the flange 211 of stopcontrol slide 218, retains the slide in contact with the heel 215 of the stop-control lever. The slide 218 is thus brought into its normal position simultaneously with lever 213.

In a manner similar to that previously described with reference to the pivoted type of combination stop, a margin-counter-stop lever 296, formed with two margin-counter-staps, a left counter-stop 228 and a right counter-stop 226, may be pivotally and slidably mounted on the outer end of stud 214 by means of a screw 269 and a slot 269, Figure 14. The left counter-' stop 228 is located slightly rearwardly of the right counter-stop 226, and the contact faces 298 and 291 of the respective counter-stops are of substantially the same height.

To start a writing-line, the carriage is moved rightwardly until a projection 300, Figure 20, at the bottom of the left combination stop 224, in its margin-control position. B, Figure 14, engages the contact face 291 of the right counter-stop 226, arresting the movement of the carriage and determining the left margin position. As indicated in Figure 20, the notch 221 out in the lower rear corner of the left combination stop 224 permits said stop to by-pass the left counter-stop 228 during the rightward movement of the carriage. Similarly, as indicated in Figure 21, a slot 225 is vcut at the bottom of the right combination stop 223 to clear the right counter-stop 226 when the carriage is letter-fed.

Upon completion of the writing-line, an extension 30l at the bottom of the rear edge of the right combination stop 223 engages the. contact face 298 of the left counter-stop 228, limiting the letter-feed movement of the carriage an determining the writing-line length.

With a selected combination stop, as 223, Figure 14,- in its tabulator-control position, as previously described, a tabulator key 302, Figure 12, is depressed, when a tabulating position of a writing line is desired, rotating a tabul'ator-key lever 303, upon which said tabulator key is mounted, about a pivot-rod 304 extending longitudinally across the frame. The lower arm 305 at the rear of the tabulator-key lever, pivotally connected to a tie-bar 306, by a screw 301, moves said tie-bar, rotating a bail 308, pivotally mounted by a pair of screws'309, inserted in the rear of the frame, counterclockwise of Figure 12, by means of an arm 3! extending from the rear end of the tie-bar 306, and pivotally attached to a lowerarm 3 of the bail 308 by a screw 3l2. A finger M3 on the upper arm of the bail engages a depending arm 3I4 of a tabulator-counter-stopcontrol lever 315, Figure '15, drawing said lever rightwardly over apair of screws 346 threaded into the rear plate of the shift-frame, said screws area-rec siidably supporting the lever 3l5 by means of a pair of slots 3!! cut in a horizontal arm 3I8 of said lever. When the lever 3I5 is drawn rightwardly, a diagonal slot 320, out in a bracket 32I at the free end of the counter-stop lever 3i 5,

near the center of the machine, engages a finger 322, depending from a tabulator-counter-stop bracket 323. The tabulator-counter-stop bracket 323, pivotally mounted, by means of its bracketside-arms 323, on a pin 3225, supported by a bracket 323, attached to the rear of the shiftframe, is angularly displaced upwardly into the operative position indicated by solid lines in Figure 16 by the camming action of the finger 322 and the slot 328. The release of the carriagev the tabulator-stop position of the writing line.

When the tabulator-key 362 is released. a spring 339, Figure 15, attached to the bracket 32! of the tabulator-counter-stop lever 3i 5, withdraws said lever leftwardly until the vertical arm 3i 1 depending from the right end of the counterstop lever engages a pin 33l mounted in the shift-frame. The leftward movement of the diagonal slot 320 against the finger 322 causes the counter-stop bracket to move to the position indicated by dotted lines in Figure 16, with the counter-stop finger 328 out of range of any of the combination stops 223 and 223 in the tabulating position. i

The braking action of the carriage, to reduce the jarring impact of the contact of the combination stops with the tabulator-counter-stoo finger, functions in a manner similar tothat previously described, when the tabulator-key is depressed. The vertical arm '3I4, Figure 12, of the tabulator-counter stop leverin its rightward movement engages the lower extension arm III at the bottom of the bracket II2, thus actuating the brake-control mechanism, as previously described.

In order to restore the combination stops 223 and 224 to their normal or inoperative positions, a stop-restorer key 332 at the right side of the machine is depressed, angularly displacing a stop-restorer lever 333 upon which said key is mounted rearwardly about a pivot 329 attached to the right frame side-member. A tie-bar 334 at the bottom of the machine is moved rearwardly by a screw 33!, pivotally connecting the forward end of the tie-bar 334 with the bottom of the stop-restorer lever 333. As the lever 333 is displaced rearwardly, the edge of a slot 333 in the rear end 331 of the tie-bar 334 engages a screw 333 threaded into an arm of a bell-crank 339, rotating said bell-crank about a pivot-screw 340 inserted in the bottom of the frame. The freearm 3 of the bell-crank 339 connected by a link 342 .to the lower flange 212 of the stopcontrol lever 213 angularly displaces said lever rightwardly about the stud 214, raising the horlzontal arm 216 of the lever 213 to ,the position indicated in Figure 19, with a toe 344 of the stopcontrol lever in the upper or stop-restoring posi:

tion.

When the carriage is letter-fed in the normal previously described. I I

places the finger I leftwardly, the angular manner, or the previously described rack-control lever 935 is depressed releasing the carriage-feed rack and allowing the operator to freely move the carriage, the bottoms of the stops 223 and 224 which had been in operative position are brought successively into contact with the toe 346 of the stop-control lever 213 which, by a camming action, slides the stops upwardly in the rack into the inoperative position D, Figure 19, with the stops out of range of the margin counter-stop contact-faces and the tabulator-stop contactfinger.

The torsional spring 239, previously mentioned, retains the stop-control slide against the heel 215 of the stop-control lever when the free end of the arm 21% is raised to any of the upper positions indicated by dotted lines in Figure 18. The finger 280 of the stop-control slide 218 is thus thrown idly out of engagement with the top of the combination stops, when the lever 213 is in its stop-restoring position, as indicated in Figure 19.

The rightward rotation of the vertical arm of the stop-control lever 213, actuated by depressing the stop-restorer key 332, draws the link 213 rightwardly, displacing the bell-crank 2B5 counterclockwise of Figure 12. The screw 261 in the free end of the bell-crank 235 is moved forwardly along the slot 266 provided in the upper face of the bracket 26% at the rear end of the tie-bar 232, thus preventing the forward motion of the screw 251 from being transmitted to the tie-bar, and allowing the stoprestorer key to be depressed without interfering with the margin or tabulator stop set lever.

The slot 336 is provided at the rear end of the tie-bar 33 A at the right side of the machine for a similar purpose; Depressing the margin-stop-set key 2&1 or the tabulator-stop-set key 282 at the left-side of the machine displaces the links 219 and 362 and the lower flange 212 of the stopcontrol lever 213 leftwardly, as previously described, rotating the bell-crank 339 clockwise. The screw 338 at the free end of the bell-crank 339 slides forward in the slot 336, thus preventing the transmission of the motion of the margin and tabulator control levers to the stop-restorer lever.

When the stop-restorer key 332 is released, a spring 331, one end of which is attached to the rear of the tie-bar 334, the forward end being connected by a pin348 to the right side of the machine-frame, withdraws said tie-bar forwardly, raising the stop-restorer lever and stop-restorer key to their normal positions.

The line-end-signal device functions in a manner similar to that previously described, the striker I13, bell I30 and finger I15 being the lid same as those utilized with the pivoted type of combination stop. During the letter-feeding movement of the. carriage, the bottom of the selected right combination stop 223, in its marally mounted on the screw I11, the opposite end of said lever terminating in the striker I18, as

When the stop 223 dismovement of the striker-lever I13 raises the striker I13, in opposition to the spring I83, from the bell "II with which it is normally lightly in I30. As the stop releases the finger. I15, the

torsional spring I83, interposed between the striker-lever I16 and the bracket 353 at the pivotscrew I11, brings the striker sharply against the bell, as previously described.

The type-action, 'the universal bar and universal bar control mechanism, the line-end keylock, and key-release and the margin-release mechanisms are similar to those previously described with reference to the pivoted type of combination stops.

The right combination stop 223 in its margincontrol position, as previously described, engages the contact face 298, Figure 14, of the left margin counter-stop 228 a few letter-spaces before the extreme end of the line. As the carriage continues to move leftwardly in letter-space steps, the counter-stop lever 29B is moved leftwardly, the previously mentioned screw and slot mounting of lever 296 permitting such movement. The leftward movement of the counter-stop lever 296 angularly displaces the vertical lever I81 and, through the instrumentalities previously described, locks the keys through the agency of the universal bar.

When the carriage is displaced rightwardly, to begin anew writing line, the right combination stop 223, in its margin-control position A, disengages contact face 298 of the left margin counter-stop. The spring I98 linking the vertical arm 354 of the counter-stop lever to the bracket 353, attached to the rearof the frame, withdraws said lever rightwardly to the normal position indicated in Figures 12 and 14, the previously mentioned yoke I85 at the left end of the counterstop lever releasing the upper end of the vertical lever I81. The universal bar is thus released, as previously described, permitting the normal typebar action.

It will be understood that the margin-release button 202 and its associated-mechanism, previously described in connection with the pivoted type of combination stops may be used in this construction also, as the key action and locking mechanisms are identical in each case. It will also be understood that the functions of the combination stops are independent of whether the typing operation is carried on in upper or lower case position because of the association of the' working parts with the case-shift frame.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim: 1. In a typewriting machine, the combination with a carriage, and a shaft mounted on said carriage, of a plurality of combination margin-and tabulating stops individually rotatable on said 'shaft to different operative positions, means, in-

cluding selectively operable keys, for setting said stops individually to their operative positions for controlling the tabulator-positions and the opposite marginal positions of said carriage, counterstops operatively engaging said rotatable stops in their opposite margin-control positions, respectively, for arresting the opposite marginal movements of said carriage, and a tabulator counterstop.

2. In a typewriting machine, the combination with a springpropelled carriage and a letterspacing mechanism for said carriage, of a plurality of stops, mounted on the carriage at letterspace intervals, for controlling the opposite marginal and the tabulating positions of said'carriage, each stop being settable individually either to a position for arresting the carriage marmounted on said carriage, a stop-rack pivotally mounted on said shaft, a plurality of adjustable stops pivotally mounted on said shaft, and guided by said rack, said stops being individually rotatable on said shaft to different settings for controlling the margin and tabulating positions of said carriage, and counter-stops operatively engaging said stops in their margin and tabulating positions, respectively, for arresting said carriage in said margin and tabulating positions, said rack being rotatable on said shaft for rotating the stops into position to co-operate with a stop restoring device.

4. In a typewriting machine having a laterally slidable carriage, a shaft mounted on said carriage, a stop-rack, a plurality of combination margin and tabulator stops spaced laterally from one another by said rack, and pivotally mounted on said shaft, a mechanism for angularly displacing said combination stops about said shaft, into their operative positions, said stops having detenting connections to said rack for yieldably holding said positions, and counter-stop means operatively engaging said combination stops for controlling the margin and tabulator locations of said carriage.

5. In a typewriting machine having a frame, the combination with a laterally slidable carriage on said frame, of a plurality of combination stops mounted on said carriage so as to be settable individually to different postures for controlling the margin and tabulating positions of said carriage, counter-stop-means for engaging said combination stops, including right and left marginal counter-stops laterally separated by a gap, and a stop-setter actuatable t'o set said stops and disposed on said frame to set any individual combination stop when the latter is registered with said gap by means of said carriage.

6. In a typewriting machine having a letterfeeding and tabulating carriage, the combination of a plurality of combination stops mounted on said carriage so as to be settable individually to different operative positions for controlling the margin and tabulating positions of said carriage, right and left counter-stops and a tabulating counter-stop for engaging saidcombination stops respectively as margin stops and tabulating stops depending on the setting of said combination stops, a margin-stop-setting key, a tabulatingstop-setting key, a stop-setter, mechanism cooperative with said keys for actuating said stopsetter differently for setting any combination stop, from a neutral position, into one or another of its operative positions, the combination stop that is set depending on the position of the carriage, and means for retaining said stops in their several positions.

7. In a typewriting machine, the combination with a frame and a laterally slidable carriage, of a cylindrical shaft attached to said carriage, a plurality of combination stops pivotally mounted on said shaft, for controlling the margin and tabulating positions of said carriage, a stop-rack pivotally mounted on said shaft for laterally spacing said combination stops, a mechanism angularly displacing said stops into their operative positions, counter-stops operatively engaging said stops for arresting the lateral movements of said carriage at its margin and tabulating positions, and instrumentalities mounted on the plurality of combination stops pivotally mounted on said shaft, for controlling the lateral movement of said carriage, counter-stop means therefor, a mechanism angularly displacing said stops into their margin and tabulator control positions, counter-stops operatively engaging said stops for arresting the lateral movement of said carriage, an instrumentality for restoring said combination stops to their inoperative positions, and means rotating said combination stops about said shaft into engagement with said restoring instrumentality.

9. In a typewriting machine having a laterally movable carriage, a shaft attached to said carriage, a stop-rack pivotally mounted on said shaft, a, plurality of combination stops pivotally mounted on said shaft to be rotatable about the latter to different settings for controlling the margin and tabulating positions of said carriage, and a series of letter-spaced slots cut in said rack, laterally locating said combination stops, said rack being rotatable on said shaft to rotate the stops into position to co-operate with a stop restoring device.

10. In a typewriting machine, the combination with a main frame, a case shiftable-frame, a platen-carriage supported on said shift-frame, a complement of stops mounted on said carriage, and selectively settable for predetermining different margin and tabulating positions of said carriage, counter-stop-means for said stops, a setter for said stops, arranged to shift with said shiftframe, a key-mechanism, for said setter, on said main frame, and connecting means arranged to enable said key-mechanism to actuate said setter whether said shift-frame is in its normal or shifted position.

11. In a t'ypewriting machine having a laterally slidable carriage, a hollow rack mounted on said carriage, a series of equally-spaced notches cut transversely through the top of said rack, a corresponding series of notches cut transversely through the bottom of said rack in line with said upper notches, said notches co-operating to form a series of vertical slot's through said rack, a plurality of combination stops individually slidable in said slots from a neutral position to a margin position or to a tabulating position, for controlling the margin and tabulating positions of said carriage, counter-stop mechanism having a cooperative alignment with the margin positioned combination stops but having normally no cooperative alignment with the tabulating-positioned combination stops, and a tabulating'key operable to bring the tabulating-positioned combination stops and the counter-stop mechanism into cooperative alignment.

12.v In a typewriting machine having a laterally slidable carriage, a rack, a series of letter-spaced slots in said rack, a plurality of plate-like combination stops slidably fitted and difierently po- Ill sitionable in said slots for controlling the margin and tabulating positions of said carriage, and counter-stops therefor, each of said combination stops having one of its ends jogged to form relatively offset margin and tabulating stop lugs engageable with said counter-stops.

13. The combination with a laterally reciprocable typing-machine carriage, of a letterspaced series of combination stops mounted on said carriage so as to be settable individually from a neutral position to one or another of different operative positions, to'establish margin stations, or intermediate tabulating stations of the carriage, two, right and left, margin counter-stops for engaging respectively opposite sides of said combination stops in their operative positions, said counter-stops being oifset transversely of the carriage path, a tabulating counter-stop, and an actuatable stop-setting device, efiective at a plane between said margin counter-stops, whereby, upon initially placing the carriage at a desired right or left margin station, or at a desiredintermediate tabulating station, said stopsetting device is effective, upon actuation thereof, to set the appropriate combination stop to one or another of its said operative positions to establish such right or left margin station or intermediate tabulating station.

1 4. The invention as defined in claim l3, inclusive of a mechanical stop-restoring device common to all the combination stops and actuatable at will to effect restoration of any combination stop, fromeither its marginal position or from its tabulating position, to a neutral position.

15. The combination ,with a laterally movable typing-machine carriage, a carriage-movementlimiting stop-device thereon, settable from a neutral position to an operative position, a counterstop to engage said stop-device, and restoring mechanism conditionable and effective, through lateral movement of the carriage, to'restore said stop-device to neutral position, of an operative connection between said restoring mechanism and counter-stop effective to disable said counter-stop while said restoring mechanism is conditioned for restoring said stop device.

16. The combination with a typing-machine carriage, and a letterspaced series of stops therefor, each'stop settable individually from a neu-, tral position to .a marginal position or to a tabulating position, of a stop setter engageable with one or another stop, depending on the letter space position of the carriage, said stop-setter being operable differently for setting said stopv to either the marginal pr tabulating position, a selectively-operable key-mechanism, including a margin-set key and a tabulator-set key, for operating said stop-setter differently, and counterstop means for said steps including a counterstop normally effective to engage the margin-positioned stops.

17. In a margin-stop mechanism for a typingmachine carriage, a system of letter-spaced stops individually settable from an idle position to an operative position, said system being divided into two sub-sets of stops, one sub-set being for left-hand margins and the other sub-set being 7 for right-hand margins, a key-operated device 4 adapted to set the stops in either sub-set to operativeposition by displacement'of substantiallythe same extent from said idle position, the stops from the stop-lug of any stop set to operative spaced combination stops mounted on said carriage so as to be settable individually from a neutral position to a position to serve as 2. margin stop or to another position to serve as a tabulating stop, counter-stop means for said stops and including a margin counter-stop normally effective to engage the margin-positioned stops, a stop-setter engageable with any one of said stops depending on the position of said carriage, said stop-setter being movable to different positions to eifect the setting of said stop to its different positions, a margin-set key, a tabulatorset key, and means effective through the operation of one or the other of said setting keys to correspondingly move said stop-setter to one or the other of its different stop setting positions.

19. In a typewriting machine, the combination with a main frame, a case shiftable frame there on, and a laterally slidable carriage on said case shiftable frame, of a plurality of combination stops mounted on said carriage and individually movable to different positions, for controlling the margin and tabulating positions of said carriage, counter-stops therefor, a slidable stop-setter mounted on said main frame for controlling the movement of said combination stops, and a member on said case shiftable frame operable for controlling the movement of said stop-setter on'said frame for locating said stops in their margin and tabulating control positions, said stop-setter being operatively connected to said member so as to case-shift with said member.

20. In a typewriting machine, the combination with a letter-feeding carriage, of a rack on said carriage, a system of key-settable stops mounted on said carriage and disposed at letter-space intervals by said rack, said system of stops being substantially coextensive with the length of the carriage run, a stop-setter, a stop-setting key operatively connected to said stop-setter to set said stops individually to tabulating positions, said system of stops being divided into right-hand and left-hand .sub-sets, amargin-key operatively connected to said stop-setter for setting said stops in said sub-sets from normal to margin-controlling positions, a counter-stop movable to position to engage the stops that are set to tabulating position, a counter-stop to engage any marginally 'set stop in one sub-set of stops to control the right-hand margin on a work-sheet, and a counter-stop to engage any marginally set stop in the other sub-set, for controlling the margin at the left-hand border of the work Sheet. 1

21'. In a typewriting machine having a main frame, a shift-frame, a platen-carriage supported on said shift-frame, a plurality of selectively settable combination stops, mounted in letter spaced array on said carriage for controlling the margin and tabulating positions of said carriage, counterstops to coact with said combination stops, a setter, for said combination stops, mounted to shift with said shift-frame, an actuator for said setter mounted on said main frame, and an ophand margin-control positions, the left margin stops being oifset, transversely of the carriage path, from the right margin stops in the set positions of the stops and a pair of counter-stops, one counter-stop being individual to the left subset, and the other counter-stop being individual to the right sub-set, for limiting the opposite marginal'movements of said carriage, said counter-stops being oflset transversely of the carriage path.

23. In a typewriting machine, the combination with a letter-feeding carriage, of a rack mounted on said carriage, a series of longitudinally letterspaced slots cut insaid rack, and a system of keysettable combination stops slidably fitted in the slots in said rack, each stop individually movable in its slot to different. positions for controlling a marginal or a tabulating position of said carriag'e, counter-stop means, including right and left margin counter-stops, for engaging said combination stops, and a stop-setter differently operable selectively in respect to said different positions for setting a stop fora margin or for tabulating, said carriage being placeable relatively to said stop-setter for selecting the stop preparatory to setting the latter, said stop-setter working in a plane between said margin counterstops.

24. A key settable margin and tabulating stop mechanism for a typing machine carriage, including, in combination, n. series of combination stops mounted at letter-space intervals for individual settings, from an idle position to a margin position or. a tabulating position, a marginset key, a tabulator set key, a single stop-setter, means enabling said keys to actuate said stopsetter differently for margin setting or tabulator setting of a stop, and counter-stop means for engaging said stops for margin or tabulating arrest of the carriage, said counter-stop means including a counter-stop normally effective to engage the margin-positioned combination stops.

25. In a margin and tabulating stop-setting mechanism for a typing carriage, a series of combination margin-and-tabulating stops, means supporting said stops at letter-space intervals for individual stop-setting movements, transversely of the carriage, from an idle position to a margin position or to a tabulating position, said stop-setting movements being substantially in the same direction but of different extents from said idle'position, a stop-setter, means, including selectively operable keys, for moving said stop-setter diiferently to set said stops to said margin or tabulating position, and counter-stop means for engaging said stops in their set positions, said counter-stop means including a counter-stop normally effective to engage the marginpositioned combination stops.

WILLIAM A. DOBSON.

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