US1935436A - Typewriting machine - Google Patents

Description

Nov. 14, 1933. c. w. CRUMRINE TYPEWRITING MACHINE Filed March 18, 1951 2 Sheets-Sheet 1 in Q in whqvfihw m ul [I I @l mwhww INVENTOR I CH STER W. CRUMRINE BY ATTORNEY Nov. 14, 1933. c, w, CRUMRINE TYPEWRITING MACHINE Filed March 18, 1931 2 Sheets-Sheet 2 INVENTOR CH STER W. CRUMRINE T I 3m w ON ATTORN EY Patented Nov. 14, 1933 UNITED STATES PATENT OFFICE TYPEWRITIN G MACHINE Application March 18, 1931. Serial No. 523,515

21 Claims. (01. 197-176) This invention relates to improvements in typewriting machines, and particularly to tabulatlng devices whereby one or more stops are adjustably mounted on the carriage and adapted to engage a stationary stop movable into their path to stop the carriage in one or more desirable positions when the carriage is moved under the action of its spring drum.

The principal object of this invention is to provide a tabulating mechanism which is simple in construction, comprises but few parts and is therefore inexpensive to construct, and in which means are provided for absorbing the force of impact between the stops to reduce the noise caused thereby.

Another object of the invention is to mount the stationary stop in a tabulating mechanism for limited movement in the direction of movement of the carriage against the yielding resistance of a spring on one arm of a resilient U- shaped bracket also yieldable in the direction of the carriage movement.

1 A still further object of the invention is to provide means in a power driven typewriting machine for locking the carriage return devices against actuation when the tabular devices are operative.

To these and other ends, the invention consists in the construction and arrangement of parts that will appear from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claims at the end of the speciflcation.

In the drawings:

Fig. 1 is a fragmentary plan view of the right hand end of the machine showing a part of the machine frame, parts of the carriage and tabulating devices applied thereto and constructed according to one embodiment of the invention;

Fig. 2 is a rear elevation of the same;

Fig'. 3 is a sectional view taken substantially on line 33 of Fig. 2 and looking in the direction of the arrow at said line;

Fig. 4 is a transverse section of power driven devices for actuating the tabulating devices;

Fig. 5 is a view similar to Fig. 1 but showing parts in another position;

Fig. 6 is'a view similar to Fig. 2 but showing parts in another position;

Fig. '7 is a view similar to Fig. 3 but showing parts in another position, and

.Fig. 8 is 'a view similar to Fig. 4 but showing parts in another position.

Referring specifically to the drawings, in

which like reference numerals refer to the same part in all the figures, 1 is a. part of the machine frame on which a carriage comprising an escapement rack 2 and stop bar 3 is movable transversely for letter spacing. One or more tabulating stops 4 are adjustably mounted on the stop bar 3. The carriage is continuously urged to the left, or to the right as seen in the drawings, by means of a spring drum and controlled in such movement by the usual escapement devices, which in the embodiment illustrated comprises a pair of pawls 6 alternately engageable with the teeth of the rack 2.

Mounted on a fixed part of the frame is a U-shaped bracket 8, one arm 9 of which is secured to the frame and the other arm 10 of which has an elongated opening which engages a. stud 11 projecting from a fixed part of the frame. The bracket 8 is constructed of resilient material and the arm 10 has a limited movement on the 7g stud 11 toward and from the arm 9 against the resiliency of the material of which the bracket is constructed.

A stop lever 12 has an elongated opening therein, whereby it is pivoted on a stud l3 projecting 39 from the arm 10. By this arrangement, the lever 12 has a pivotal movement in a vertical plane on the stud 13 and also a limited sliding movement against the resiliency of a spring 14 which connects the lever with the fixed stud 11. 35 The lever 12 is loosely pivoted on the stud so that it may have a limited pivotal movement thereon about a vertical axis, but is always retained in a vertical plane. To this end, a T earing plate 15 is arranged on the stud 13 in contact with the rear side of the lever 12 so that the lever is arranged between the bearing plate and the arm 10 of the bracket 8. The left end of the plate 15 is cut away adjacent the lever to form an inclined surface 16, and the right end of the arm 10 is also cut away adjacent the lever to form an inclined surface 17 substantially parallel with the surface 16. This arrangement permits limited pivotal movement of the lever 12 in a horizontal plane from the position shown in Fig. 1 to that shown in Fig. 5. Since the lever is confined between the vertical walls of the arm 10 and plate 15, it'is restrained against pivotal movement about a horizontal axis arranged at right angles to the pivot 13. From the arm 10, the lever 12 inclines rearwardly and to the right, asseen in the drawings, and terminates in a downwardly projecting portion 18 provided with an elongated opening 19, for a purpose presently explained. It willbe noted that 1 2 the arm 10 on which thelever 12 is mounted is longer than the arm 9 and that the lever is mounted on the-arm adjacent its end, by which construction the bracket is more yielding under the action of the lever than would otherwise be the case.

The left hand end of the lever 12, as seen in the drawings, is provided with a stop 20 which normally lies in the path of the usual margin or line stops well known in the art but not shown herein, since they form no part of the present invention. A stationary tabulating stop 21 is also provided on the lever 12, which is normally out of the path of the tabulating stop 4. Key controlled means are provided for swinging the lever 12 independently in two planes arranged substantially at right angles to each other. To this end, the slot 19 is engaged by a forwardly projecting lug 22 on the upper end of an arm 23 pivotally mounted on an arm 24 of a bell crank lever pivoted on a. bracket 25 secured to the frame of the machine. The other arm 26 of the bell crank lever is operatively connected by means of a link 27 with the usual margin release key, depression of which is efiective to raise the arm 23 to swing the lever 12 in a counterclockwise direction, as seen in the drawings, to move the stationary stop 20 out of the path of the carriage margin stops to permit writing a longer line. A coiled spring 28 connects the arm 23 with a rearwardly projecting portion of the bracket 25 and operates to retain the arm in its normal position with its lower end in engagement with a stop 29 projecting from the bracket 25. The stop 29 may be made adjustable, as indicated in the drawings, to vary the normal position of the arm 23 and lever 12 engaged thereby. The usual tabulator key, not shown, is also operatively connected to the arm 23 by means of a link 30 pivotally-connected to the arm at a point intermediate its pivot and the lug 22.

Depression of the tabular key is operative to swing the arm 23 and with it the right hand end of the lever 12, as seen in the drawings, forwardly from the position shown in Fig. 1 to that shown in Fig. 5. The lever 12 swings in a horizontal plane on the pivotv 13 and its left hand end swings rearwardly to move or project the stop 21 into the path of the stop 4 on the carriage. The lever 12 engages a vertical ear 31 on pawl release lever 31, which lever has another ear 31 which is arranged to engage the escapement devices or pawls 6 and swing them out of engagement with the carriage rack when the lever 12 is moved to project its tabular stop 21 into the path of the carriage stop or from the Fig. 1 to the Fig. 5 position of the drawings. It will be noted that when the tabular key is actuated to move the tabular stops into cooperative relation, the escapement devices are simultaneously released from the carriage, permitting the carriage to move freely to the right as seen in the drawings, until the stop 4 engages the stationary tabular stop 21 on the lever 12. As the carriage moves under the action of its spring it acquires considerable momentum, causing the stop 4 to strike the stop 21 with considerable force, causing noise and vibration. By mounting the lever 12 in the manner described, it is permitted to yield a limited distance with the carriage against the resiliency of the spring 14 until its elongated opening engages the pivot 13 when further reaction is absorbed by the resiliency of the bracket 8 and the can'iage gradually comes to rest substantially without noise or shock.

The tabular devices may be actuated by power driven means of the well known type employed in the machine illustrated, and comprising a continuously rotated roller 32 adapted to be engaged by a cam 33 controlled by the tabular key. The cam 33 is revolubly mounted in one arm of a bell crank lever 34 adjacent the periphery of the roller 32. The other arm of the bell crank lever is operatively connected with the link 30 by means comprising the link 35. Rotation of the cam in contact with the roller 32 swings the bell crank to actuate the tabular devices. normally retained out of engagement with the roller 32 and at rest by means of a stop 36 which engages a lug 37 on one end of a lever 38 pivoted on the bell crank and having a lug 39 at its other end which is engaged by a key controlled arm 40. When the arm 40 is actuated, the lug 37 is moved out of the path of the stop 36 and a spring-pressed arm 41 on the bell crank 34 engages a lug 42 on the cam and turns it into engagement with the roller 32. The interengagement of the stops 36 and 37 again stops the cam in the Fig. 4 position after a complete rotation.

To prevent the necessity of holding down the tabular key until the carriage hits the tabular stop, means are provided for locking the stop lever 12 in the Fig. 5 position when actuated by the key controlled devices until its stop is engaged by a carriage stop 4, and since the escapement devices are disengaged by the lever 12, the carriage is free to move until the lever 12 returns to its normal position shown in Fig. 1. Said means comprises a latch in the form of a dog 45 having two arms 46 and 47, and resiliently urged in a counterclockwise direction, as seen in the drawings, by a spring 48. The dog 45 is pivoted on the frame and the arm 46 normally projects rearwardly and engages the left hand side of a lug 49 projecting downwardly from the lever 12. When the tabulating key is operated, the left hand end of the lever with the lug 49 swings rearwardly and the arm 46 under the action of the spring 48 swings in front of the lever and retains it in the position to which it has been moved or the position shown in Fig. 5. The arm 47 of the dog engages a stop 50 on the frame when the dog moves under the action of its spring and retains it in the position shown in Fig. 5 with its arm 46 in engagement with the front face of the lug 49. From an inspection of Fig. 5, it will be noted that the dog 45 engages the lug 49 adjacent its left hand edge, so that a limited movement of the lever 12 to the right is sufiicient to move the lug from the arm 46 and permit the lever 12 to return to normal position under the action of its spring. Due to the speed of the moving carriage and its sudden stop, there is liability of the carriage rebounding from the stationary stop and means are provided for locking the carriage against rebound. To this end, an extension 51 projects to the left from the lever 12 and engages the rear face of a post or lug 52 projecting upwardly from an arm 53 pivoted at 54 on a fixed part of the frame. Also mounted on the lever 12 and extending to the left therefrom is a leaf spring 55 which resiliently engages the front side of the lug 52. The arm 53 extends rearwardly to the right from its pivot as seen in the drawings, and terminates at its free end at a point closely adjacent the stationary tabular stop 21. Adjacent its free end the arm 53 has a cam surface 56 inclined rearwardly and to the right. When the lever 12 is moved to the Fig. 5 position by the power actuated devices to move The cam 33 is V the stop 21 into the path of the carriage stop 4, the extension 51 moves away from the lug 52 on the arm and the spring 55 moves against the lug and swings the arm rearwardly into the path of the stop 4 and against a stationary stop 57. As the carriage moves to the right, the stop 4 engages the cam surface 56 on the arm 53 and moves it forwardly against the tension of the spring 55, as it moves into engagement with the stop 21, and the springj55 again swings the arm rearwardly into the path of the stop 4 but to the left of the stop and prevents rebound. When the stop 4 engages the stop 21, the lever 12 moves to the right against the resiliency of the spring 14 and bracket 8 a distance sufiicient to disengage the dog 45 from its lug 49 and permits the spring 14 to operate'to return the lever to' its normal position and with it the arm 53 engaged by its extension 51.

In the machine illustrated, the carriage is returned or moved to the left, as seen in the drawings, to begin a new line of writing by key controlled power driven devices, means comprising the lever 60 being provided for rendering the power driven devices inoperative before the carriage margin stop fully engages the stationary stop 20 to arrest the carriage. The lever 60 is mounted on a fixed part of the machine and projects upwardly therefrom to the front of the lever 12 and adjacent thereto. At its upper end it has a leftwardly projecting arm 61 provided with a bracket or stop 62 which extends forwardly, then upwardly therefrom, and at its upper end has a forwardly and downwardly projecting portion 63, see Fig. 3, which is arranged immediately beneath a bracket 64 projecting forwardly and downwardly from the lever 12. Normally the stop 62 is out of contact with the bracket 64 but moves into engagement therewith when the arm 61 is elevated to the position shown in Fig. 3 by the actuation of the carriage return devices. Serious injury to the parts would result if the tabulating devices were actuated when the carriage return devices are operating; however, the member 63 engages the member 64, as shown in Fig. 3, and the tabulating devices, if operated at this time, would swing the lever 60 to render the carriage return devices inoperative. Injury to the parts might also result from an actuation of the carriage return devices when the tabulating devices are operating, and the interengaging or interlocking devices 63 and 64 are also operative to lock the carriage return devices against actuation when the tabulating devices are operating. By comparing Figs. 3 and '7, it will be noted that the bracket 64 moves rearwardly with the stop 21 when the lever 12 is actuated by the tabular devices and engages the bracket 62 and looks the lever 60 in depressed position. Since the lever 60 is elevated or turned in a clockwise direction when the carriage return devices are moved into operation, said devices are inoperative when the lever is thus locked in depressed position by the bracket 64. Since the carriage return devices are fully described in a copending application Serial No. 523,480, filed of even date herewith by Russell G. Thompson and myself, further detailed description thereof is deemed unnecessary here.

Briefly the operation is as follows: When the tabulating key is depressed, the left end of the lever 12 is swung rearwardly to move its stop 21 into the path of the carriage stop 4, and simultaneously withdrawing the pawls 6 from the rack 2 so that the carriage is free to move to the stop 4 as the stop moves therefrom into engagement with the stop 21. When the stop 4 engages the stop 21, the latter yields with the lever 12 against the tension of the spring 14 until the end of its slot is reached, and further momentum of the carriage is absorbed by the resiliency of the bracket 8. gradually comes to rest without excessive shock, noise or rebound.

Although only one embodiment of the invention is shown and described herein, it will be understood that this application is intended to cover such changes or modifications as come within the spirit of the invention or scope of the following claims.

I claim:

1. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, escapement devices for controlling the movement of the carriage, a tabulating stop on the carriage, a stop lever pivotally mounted on the frame and having a limited sliding movement thereon in the direction of the carriage movement, resilient means for retaining said lever at one limit of its sliding movement, a tabulating stop on said lever normally out of the path of said carriage stop, key controlled means for swinging said lever to project its stop into the path of the carriage stop, and means controlled by said lever for releasing the escapement devices from the carriage, the arrangement being such that when the carriage stop engages the stop on the lever the latter slides bodily with the carriage against the action of said resilient means.

2. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, escapement devices for controlling the movement of the carriage, a tabulating stop on the carriage, a resilient bracket on the frame, a stop lever pivotally mounted on said bracket, a tabulating stop on said lever normally out of the path of said carriage stop, key controlled means for swinging said lever to project its stop into the path of the carriage stop, and means controlled by said lever for releasing the escapement devices, the arrangement being such that when the carriage stop engages the stop on the lever the latter moves bodily with the carriage against the resiliency of the bracket.

3. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, escapement devices for controlling the movement of the carriage, a tabulating stop on the carriage, a resilient bracket on the frame, a stop lever pivotally mounted on said bracket and having a limited sliding movement thereon in the direction of the movement of the carriage, resilient means for retaining said lever at one limit of its sliding movement, a tabulating stop on said lever normally out of the path of said carriage stop, key controlled means for swinging said lever to project its stop into the path of the carriage stop, and means controlled by said lever for releasing the escapement devices, the arrangement being such that when the carriage By this arrangement, the carriage stop engages the stop on the lever the latter slides bodily with the carriage to the limit of its movement on the bracket and then against the resiliency of the bracket.

4. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, escapement devices for controlling the movement of the carriage, a tabulating stop on the carriage, a two-armed resilient bracket secured by one of its arms to the frame, a stop lever pivoted on its other arm, a tabular stop on said lever normally out of the path of said carriage stop, key controlled means for swinging said lever to project its stop into the path of the carriage stop, and means controlled by said lever for releasing the escapement devices, the arrangement being such that when the carriage stop engages the stop on the lever the latter yields in the direction of the movement of the carriage against the resiliency of the bracket.

5. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, escapement devices for controlling the movement of the carriage, a tabulating stop on the carriage, a two-armed resilient bracket secured by one of its arms to the frame, a stop lever pivotally carried on its other arm, a tabular stop on said lever normally out of the path of said carriage stop, key controlled means for swinging said lever to project its stop into the path of the carriage stop, means controlled by said lever for releasing the escapement devices, the arrangement being such that when the carriage stop engages the stop on the lever the latter yields in the direction of the movement of the carriage against the resiliency of the bracket, and means for limiting the yielding movement of the bracket.

6. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, escapement devices for controlling the movement of the carriage, a tabulating stop on the carriage, a resilient U-shaped bracket secured by one of its arms to the frame, a stop lever pivotally mounted on its other arm, a tabular stop on said lever normally out of the path of said carriage stop, key controlled means for swinging said lever to project its stop into the path of the carriage stop, and means controlled by said lever for releasing the escapement devices, the arrangement being such that when the carriage stop engages the stop on the lever, the latter yields in the direction of the movement of the carriage against the resiliency of the bracket.

7. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, escapement devices for controlling the movement of the carriage, a tabulating stop on the carriage, a resilient U-shaped bracket having arms of unequal length secured by its shorter arm to the frame, a stop lever pivotally mounted on the longer arm of said bracket, a tabular stop on said lever normally out of the path of the carriage stop, key controlled means for swinging the lever to move its stop into the path of the carriage stop, and means controlled by said lever for releasing the escapement devices, the arrangement being such that when the carriage stop engages the stop on the lever,

the latter yields in the direction of the movement of the carriage against the resiliency oi the bracket.

8. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, interengageable stops on said carriage and frame, a resilient U-shaped bracket, and a lever pivoted on said bracket and on which one of said stops is carried.

9. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, interengageable stops on said carriage and frame, and a resilient U-shaped bracket having arms of unequal length and a lever, on which one of said stops is carried pivoted on the longer of said arms.

10. The combination with a frame and a carriage movable thereon, means for moving the carriage for letter spacing, a stop lever arranged in the direction of the carriage movement pivoted on the frame and having a limited sliding movement thereon in a direction longitudinally thereof, a stop on the carriage, a stop on said lever normally out of the path of said carriage stop, key controlled means for swinging the lever on its pivot to project its stop into the path of the carriage stop, and means cooperating with said lever for retaining its stop in projected position, the arrangement being such that the retaining means is disengaged from the lever when its stop is engaged by the carriage stop to slide the lever on its pivot.

11. In a typewriting machine, the combinaof a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stop on the carriage, a stop lever pivotally mounted on the frame and having limited sliding movement on its pivot in the direction of the carriage movement, a stop on said lever normally out of the path of said carriage stop, key controlled means for swinging the lever on its pivot to project its stop into the path of the carriage stop, and a pivoted dog automatically movable into locking engagement with the lever when the latter is actuated by said key controlled means and automatically disengaged from the lever when its stop is engaged by the carriage stop to slide the lever on its pivot.

12. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stop on the carriage, a stop lever arranged substantially in the direction of the carriage movement and pivotally mounted on the frame and having limited sliding movement on its pivot, a stop on said lever normally out of the path of said carriage stop, resilient means for normally retaining said lever at one limit of its sliding movement, key controlled means for swinging the lever on its pivot to project its stop into the path of the carriage stop, and a pivoted dog resiliently movable into locking engagement with the lever when the latter is actuated by said key controlled means and automatically disengaged from said lever when its stop is engaged by the carriage stop and it yields against the action of said resilient means.

13. The combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stop on the carriage, a horizontally arranged stop lever pivoted on the frame to swing about a vertical axis, a stop on said lever normally out of the path of the carriage stop but movable into said path, a movable member normally out of the path of the carriage stop but movable into its path, a resilient extension at one end of said lever engageable with a portion of said movable member for moving said movable member into the path of the carriage stop when the lever is operated to move its stop into the path of .the carriage stop, and means for operating saidlever.

14. The combinationof a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stop on the carriage, a horizontally arranged stop lever'pivoted on the frame to swing about a vertical axis, a stop on said lever normally out of the path of the carriage stop but movable into said path, an arm on the frame normally out of the path of the carriage stop, means for locking the lever in the position in which its stop is projected into the path of the carriage stop, a resilient extension at one end of said lever engageable with said arm for moving said arm and resiliently retaining it in the path of the carriage stop when the lever is operated to project its stop into the path of the carriage stop, and means for operating said lever.

15. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stopon the carriage, a horizontally arranged stop lever pivotally mounted on the frame to swing about a vertical axis, a stop on said lever normally out of the path of said carriage stop, key controlled means for swinging the lever about said vertical axis to move its stop into the path of the carriage stop, an arm pivoted on the frame and normally out of the path of said carriage stop, a resilient spring member securedto and-extending from one end of the stop lever and engageable with said arm to push it into the path of the carriage stop when said lever is actuated by the key controlled means, means for operating said stop lever to move its stop from the path of the carriage stop, anda rigid extension on said stop lever coextensive with and adjacent to the aforementioned resilient spring member and engageable'with said arm to move it in the opposite direction away from the path of the carriage stop when the lever is operated to move its stop away from the path of the carriage stop.

16. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spaca stop on the carriage a horizontally arranged stop lever pivotally mounted on the frame to swing about a vertical axis, a stop on said lever normally out of the path of said carriage stop,

key controlled means for swinging said lever to move its stop into the path of the carriage stop, an arm pivoted on the frame and normally out of the path of said carriage stop, on the stop lever engageable with said arm for swinging the arm into the path of the carriage stop when the stop lever is actuated by said key controlled means, and an extension on the stop lever disposed oppositely to said resilient means and engageable with said arm for returning the arm to normal position when the stop lever moves to normal position.

1'7. In a typewriting machine, the of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stop on the carriage, a horizontally arranged stop lever pivotally mounted on the frame to swing about resilient means into the path of the carriage stop,

combination into the path of the carriage stop, an arm pivoted on the frame and normally out of the path of said carriage stop, a projection on said arm, a resilient extension at one end of said lever engaging said projection for moving the arm into the path of the carriage stop, a rigid extension on said lever movable into engagement with the opposite side of said projection for moving said arm out of the path of the carriage stop, and means for operating said lever.

18. The combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stop on the car iage, a cooperating stop, a horizontally arranged stop lever pivoted to swing about a vertical axis on the frame on which said cooperating stop is mounted, power actuated means for returning the carriage to begin a new line, means for operating said stop lever, and means on the stop lever movable into the path of part of said power actuated means for rendering said power actuated means ineffective when said stop lever is operated.

19. The combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stop on the carriage, a cooperating stop, a horizontally arranged stop lever pivoted to swing about a vertical axis on the frame on which said cooperating stop is mounted, power actuated means for returning the carriage to begin a new line, means for operating said stop lever, a movable device operatively connected with said power actuated means, and in-- terlocking means on said stop lever overlying said movable device for rendering the power actuated means ineffective when said stop lever is operated.

20. The combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a stop on the carriage, a cooperating stop, a horizontally arranged stop lever pivoted to swing about a vertical axis on the frame on which said cooperating stop is mounted, power actuated means for returning the carriage to begin a new line, means for operating said stop lever, a lever operatively connected with said power actuated means and operable to render said power actuated means ineffective, and 1 21. In a typewriting machine, the combination of a frame, a carriage movable thereon, means for moving the carriage for letter spacing, a tabular stop on the carriage, a horizontally arranged stop lever pivoted to swing about a vertical axis on the frame, a stop on said lever normally out of the path of said carriage stop, key controlled means for swinging the lever to project its stop key controlled meansfor returning the carriage to begin a new line, a movable member operatively connected with said last mentioned key controlled means, and means on said stop lever overlying and interensagins with means on the movable member for rendering one of said key controlled means ineifectivewhen the other is operated.

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