US2209279A - Typewriting machine - Google Patents

Description

L. c. MYERS T YPEWRITING MACHINE July 23, 1940;

vim mm G w; R Ya o m f ma 0 Patented July 23, 1940 TYPBWRITING MACHINE Lewis Cary Myers, Freeport, N. Y., assignor to Royal Typewriter Company, Inc., New York, N. Y., a corporation of New York Application June 3, 1938, Serial No. 211,671

This invention relates to typewriting machines, and more particularly to stop mechanism for typewriter carriages.

It is customary to provide typewriting machines with cooperating stops carried by the main frame and carriage respectively for arresting or limiting movement of the carriage in the direction of letter spacing movements. Generally staed, such stops are provided for limiting the normal overall letter spacing travel of the carriage for fixing the margins; and also may be provided for arresting the carriage automatically at predetermined points during tabulating operations. In accordance with the present invention, mechanism is provided for conveniently and quickly setting or adjusting one or more of the cooperating stop elements so as to fix the point or points of the carriage travel at which the stops become effective for arresting or limiting movement of the carriage. Mechanism embodying the invention is particularlysuited for setting the margin stops.

An object of the invention is to provide improved mechanism for setting or positioning typewriter carriage-arresting stops.

Another object is to provide mechanism of the character stated which is arranged to be operated independently of the movement of other parts of the typewriter, such as the escapement mechanism.

A further object is to provide mechanism mounted entirely on a typewriter main frame independently of and normally out of contact with the carriage and arranged to cooperate with carriage-mounted margin stop elements for effecting their adjustment relative to the carriage when the carriage is moved in the line of letter spacing movement.

Another object is to provide margin stop setting mechanism arranged to displace a line lock lever or the like from the line of letterspacing movement of a carriage-mounted margin stop element at the time the stop element is released for adjustment along its support on the carriage.

Other objects will become apparent from a reading of the following description, the appended claims, and the accompanying drawings, in which:

Figure 1 is a view partly in vertical section and partly in elevation showing mechanism embodying the invention applied to a Royal Standard typewriter, some standard parts being omitted from the drawing in order to show more clearly the mechanism embodying the invention. The parts shown are in their normal or state-of-rest positions;

Figure 2 is a detail view of some of the parts shown in Figure 1 drawn on an enlarged scale,

with some parts shown in vertical section and some in elevation, and parts of the stop setting mechanism being shown in their operating position;

Figure 3 is a detail view in front. elevation showing a key cap for a margin stop .setting mechanism; a

Figure 4 is a transverse vertical sectional view,

somewhat diagrammatic, taken on the irregular line 4-4 of Figure 1;

Figure 5 is a view in top plan of a margin stop rod and associated parts;

Figure 6 is a partial front elevation with some parts shown in section and with certain parts of the mechanism embodying the invention shown in operating positions;

Figure '7 is a fragmentary view, partly infront elevation and partly in section, showing a movable margin stop engaging an end limit screw;

Figure 8 is a perspective view of a bracket; and

Figure 9 is a fragmentary front elevational view of a modified arrangement of margin stop setting finger pieces.

Mechanism constructed and arranged to operate in accordance with the invention may be embodied in typewriting machines of various kinds, and it is for the purposes of illustration that one form of mechanism embodying the invention is shown as applied to a Royal Standard typewriter. The typewriter shown includes the usual main frame A, carriage B, platen C, combearings I, mounts a carriage bearing rail 8 extending between and connecting carriage end plates 9 and Ill.

The carriage B is urged to the left .in letter space direction by a spring motor (not shown) of a known kind, and is controlled by escapement mechanism supported on the frame 5. The escapement mechanism also may be of a known kind, and only so much of it is shown in the drawings as is necessary to an understanding of the present invention. As shown, the escapement mechanism includes an escapement wheel II and an escapement pinion l2 journaled on the frame 5, the pinion l2 being arranged to mesh with a toothed escapement rack ll carried by a bar 14 mounted on the carriage by means (not shown) permitting the bar and rack l3 to be raised out of engagement with the pinion for rendering the escapement mechanism ineffective.

Suitable tabulating mechanism also may be provided, and some parts only of a known kind of tabulating mechanism are shown. The tabulatingmechanism is shown as comprising a bracket l5secured to the rear wall of the main frame A and serving to mount a center stop and tabulating finger mechanism such as that disclosed in the patent to Myers 2,007,611, granted July 9, 1935. Briefly stated, this mechanism includes a center stop finger l8 pivotally mounted as at l1 on the bracket l5, and a tabulating carriage stop. finger I8 pivotally mounted as at IS on the bracket l5. One end of an adjustable link 30 is pivotally connected to the center stop lever 18 as at 2|, and the other end of the link 28 is pivotally connected to the tabulating finger l8 as at 22. A column stop frame 23 is supported between the carriage end plates 9 and I0, and serves to mount a plurality of column stops 24, only one of which is shown. 1 p

A toothed margin stop bar 25 extends between and is secured to the carriage end plates 9 and M by means of screws 28, the distance between adjacent teeth on the rod being equal to one letter space. step movement of the carriage. Margin stop elements generally designated F and F are mounted for adjustment along the bar 25, these stop elements being adapted to cooperate with the center stop l8 and other parts for limiting the overall movement of the carriage in the line of letter spacing in both directions for fixing the margins on the typed sheet.

The stop element F cooperates with other elements to be described for fixing the right hand margin, and therefore will be referred to as the right hand margin stop. This element comprises an inverted U-shaped member 21 retained for sliding movements on the stop bar 25 by means of two shouldered screws 28 passing through the downwardly extending legs of the member 21 and under the stop bar. For releasably locking the right hand margin stop F in adjusted position longitudinally of the bar 25, a latch 29, provided with mounting ears 38, .is pivoted as at 3| to the U-shaped member 21 and is formed with a nose 32 adapted to enter the spaces between adjacent teeth on the bar 25. A spring 33 urges the latch nose downwardly into the spaces between adjacent teeth. In accordance with the invention, the latch nose is formed-with a laterally extending or projecting portion 34 adapted-to be engaged by means, which will be described later,

for disengaging the latch from .thebar 25 to permit longitudinal adjustment of the right stop element F. The U-shaped member 21 is provided with a block-like extension 35 projecting toward the right hand carriage end plate l0 and being adapted to engage an adjustable limiting screw 38 on the end plate for limiting the adlusting movement of the margin stop element F toward the right. An abutment screw 31 has threaded engagement with the U-shaped mem'-- ber 21 and is adapted to cooperatewith the center stop I 8 for limiting movement ofthe carriage toward the left and thereby fixing the right hand margin of the typed sheet..

In accordance with the present invention, means are provided for releasing the latch 29 to permit adjustment of the stop element F along the bar 25. Although the abutment screw 31 of the margin stop element F cooperates with the center stop lever 18 for arresting movement of center stop lever 18, and is urged by a spring not shown) to the position shown in Figures 4. 5, and 6, in which the upper end of the line lock lever is spaced slightly from the adjacent face of the center stop lever Hi. When the carriage approaches the end of its travel toward the left,v

the abutment screw 31 on the stop element F engages the upper end of the line lock lever and moves it to the left, which, through mechanism not shown herein, prevents effective operation of the type bars and space'bar mechanism in a known manner, for example, as explained in the Patent to Hess No. 1,085,382, granted January 2'7, 1914. Engagement of the adjusting screw 31 with the line lock lever and abutting of the latter against the center stop lever l8 will arrest movement -of the carriage to fix the right hand margins As is explained hereinafter, the positioning of the stop 'F on the bar 25 is efi'ected byfirst moving the carriage to the'left until the abutment screw 31 engages the line lock lever 38, then releasing the latch 29, and then moving the carriage while holding the stop F against movement until the stop is positioned relatively to the bar in its desired location. The adjusting movement of the carriage may be effected either by raising the escapement rack I3 to free the carriage or by operating the space bar to effect step-by-step movement of the carriage; but, in order to move the carriage by operating the space bar, the line lock mechanism must be released. For this reason means are provided for swinging the center stop and linelock lever from their forward or operative positions rearwardly to their inoperative positions, displacing them from the line of movement of the stop element F simultaneously with lifting of the latch 29.

Referringnow to the operating mechanism for releasing the latch 29 and for retracting or displacing the center stop lever and line lock lever from the line of movement of the stop F, a lifting finger device 39 is mounted for vertical sliding movements by means of a shouldered screw 48 having threaded engagement with the lifting finger and extending through a slot 4| in a mounting or guide plate 42 secured to the escapement frame 5 by means of screws 43. The finger 39 is formed at its upper end with a slot or notch 44 extending transversely to the direction oi movement of the carriage in letter space direction, and shaped and disposed to engage and interlock with the extension 34 on the latch nose 32 when the abutment screw 31 is in engagement with the line lock lever 38 and the latter is pressed against the center stop lever l8, thus coupling the wall I of the main frame. ,An arm 49 of the lever 41 is received by the bifurcated end 50-01.! a threearmed lever 5i pivotally mounted as at 52 on the end wall 3 of the mainframe. Another arm 53 of the three-armed lever-is pivotally connected as at 54 to a push link-or bar 55 which extends forwardly and passes through and beyond an opening 58 in the front wall or main frame cover aaoaaro 4, being provided at its outer end with a finger cap or actuating key 51. Preferably, the push link 55 is formed with an offset or vertically extending portion 58 adapted to abut against the inner face of the front wall or cover 4 to limit forward movement of the push link 55, andconsequently to limit movement of the three-armed lever 5|, the lever 41, and the lifting link 39 under the urge of a spring 58 connected between a stud 88 on the. lever 41 and an ear 6! on the main frame. It is apparent that, by pushing the link 55 rearwardly, the three-armed lever 5| will be rocked in a clockwise direction as viewed in Figure 1, the lever 41 will be rocked ina clockwise direction as viewed in Figure 4, and the lifting finger 88 will be raised.

Normally the lifting finger is entirely out of engagement and is free from contact with the latch 28 and all other carriage mounted parts. Thus during normal operation of the typewriter there can be no wear of the margin stop setting mechanism.

As previously explained, it is desirable to retract the center stop l8 and line lock lever 38 when the lifting finger 88 is raised to disengage the latch 29 from the margin stop rod 25. For

accomplishing this, one end of a link 82 is pivextension 12 on the center stop lever IS. The

arrangement is such that, when the push link 55 is moved to the right and the three-armed lever 5| rocked in a clockwise direction as viewed in Figure 1, the link 62 will move to the left until the right hand end of the slot 65 engages the pin 65 and effects rocking of the arm 51 toward the left so as to exert a pull on the link 18, thereby rocking the center stop lever 56 about its pivot l1, and displacing the center stop lever and the line lock lever 38 from the line of movement of the right margin stop F.

In operation, when it is desired to set the right margin stop F, the carriage is moved to the left until the abutment screw 31 engages the line lock lever 38 and the latter is pressed against the center stop lever IS. The key 51 is then pushed rearwardly, thereby simultaneously raising the lifting finger 39 to effect interlocking engagement of the slot 44 with the projection 34 on the latch and displacing the center stop lever l6 and line lock lever 38 from the line of movement of the abutment screw 31 of the stop F. The carriage will then be moved, either by manually operating the usual carriage release lever (not shown) to release the escapement rack l3 from the escapement pinion l2 and moving the carriage to the desired position by hand; or by operating'the space bar (not shown), until the pointer P on the type bar guide E points directly to the division on the scale D at which the right margin is desired to be fixed. Pressure on the'key 51 is then removed so as to permit the spring 59 to lower the lifting finger 38, thereby permitting the latch nose 32 to enter a tooth interspaoe directly below it. Due to the fact that, upon retraction or rearward displacement of the center stop lever l5 and line lock lever 38 out of contact with the adjusting screw 31, the upper end of the line lock lever will be moved to the right away from the center stop lever by the usual line lock lever spring (not shown), the center stoplever and-the line lock lever may, upon release of the key 51, move inwardly until the front edge of the line lock lever engages the rear side of the adjusting screw 81, preventing the center stop lever and line lock lever from returning to their normal positions. Consequently, after the nose of the latch on the right margin stop F has been set in the proper tooth interspace, it is necessary to move the carriage to the right to permit the center stop lever and line lock lever to swing forwardly into their normal positions. When theseoperations have been performed in the manner described, the right margin stop element F will be set so as to flx accurately the right margin at the point desired.

The typewriter shown also includes tabulating mechanism including a tabulating lever 18 provided with a finger cap or tabulator key I4 and being fulcrumed as at 68 on the main frame. The lever 13. is urged upwardly by a spring 15 connected between the lever and astud 16 on a part. 11 of the frame, the upward movement of the lever being limited by engagement with a fixed stop or rest 18. Means controlled by the .key 14 for transmitting motion from the key to the escapement mechanism for releasing the latter includes an arm 19 formed integrally with the lever 18 and being provided with a projection 80 extending behind the rear edge of the rock arm 5'1. The arrangement is such that, by depressing the lever 18, the projection 88 on the I arm 18 will swing the rock arm 51 to the left, thereby pulling on the link 18 and swinging the lower extension 12 of the center stop leverinto engagement with an arm 88 on a rack-lifting lever 8| pivotally mounted as at 82 on the escapement frame 5, the lever 8| having an arm 88 arranged to engage the bar It and to lift the rack l8 and. disengage it from the escapement pinion l2, thereby freeing the escapement mechanism. The movement of the center stop lever l5 thus effected .will, through the adjustable link 28, effect tabulating movement of the tabulating finger 18 in the manner described in the patent to Myers, No. 2,007,611, referred to above. When the parts are in their normal or state-of-rest positions as shown in Figure 1, the pin 56 on the rock arm 51 is disposed to the right of the midpoint of the slot 65. The distance between the pin and the left hand end of the slot 55, when the parts are in their state-of-rest positions, is such that operation of the tabulating key '13 will not move the pin 66 all the way to the left hand end of the slot 55, and consequently operation of the tabulating key I3 will not move the-link 62 and will not operate the latch nose lifting mechanism associated therewith. Furthermore, since there is some lost motion between the pin 66 and the right hand end of the slot 55, operation of the push rod 55 for releasing the latch on the right stop F will effect movement of the rock arm 61 only suflicient to retract the center stop lever'and line lock lever in the manner previously described, and will not swing the lower extension 12 of the center stop lever far enough to the left to effect disengagement of the rack 1 ing finger are inclined or cammed as at 84 and 8! Thus, if the lifting finger is in raised position and the latch nose projection 34 moves into engagement with "either of the cam'med or inclined edges 84 or 85, the latch nose will be cammed upwardly by the inclined or cammed edge, thereby releasing the latch from the margin stop bar and preventing damage to the lifting finger.

A pull link 88 shown as connected to the rock arm 81 may be extended forwardly and connected to a finger-operable device (not shownl'for effecting the well known .margin release" of the carriage. This element, however, will have no effect upon the functioning of the margin stop setting mechanism of the invention.

The left margin stop F is similar to the right margin stop I" and the mechanism for setting or adjusting the position of the stop F is similar to that for adjusting the right margin stop I, described above. The only exception is that, in the mechanism for operating the lifting finger for the left hand margin stop F, a two-armed lever having arms corresponding to the arms 53 and 50 of the lever 5| is provided, and no element corresponding to the push link 62 is employed.

This is due tothe fact that the left hand margin; stop engages directly with the center stop leverv l6, it being therefore unnecessary to retract or ,the stops are designated by similar reference characters, with theexception that the reference characters designating parts of the stop F" and its associated operating mechanism are primed.

Thus, the lifting finger 39' of the mechanism'for setting the stop F corresponds to the lifting finger 39 for setting the right hand stop F, the lever 41' corresponds to the lever 41, and so on.

Movement of the carriage for adjustably positioning the stop F on the bar may be effected either by disengaging the rack l3 from the escapement pinion l2 and positioning the carriage by hand, or by operating the back space lever (not shown) In the modification shown in Figure 9, the finger cap 51 is omitted, and the push link 5 is terminated in a rounded end 86, the lettering Margin Set R. being applied on the front wall orcover 4 of the main frame. Similarly, the left hand margin set .push rod corresponding to the push rod 55 of'the right hand margin set mechanism terminates in a rounded end 88', and the words Margin Set L. are applied adjacent the end 88' and on the main frame front wall or cover 4.

The mechanism'di-s'closed herein embodies the invention in a practical and its present preferred form, but it will be understood that various changes may be made without departing from the invention as defined in the claims.

I claim:

1. In a typewriting machine, a frame; a car-.- riage mounted on the frame for letter-spacing movements; a toothed stop bar on said carriage; a stop on said frame; a cooperating stop mounted on and for sliding adjustment movement along said bar; a latch mounted on said bar-mounted stop for movement relatively thereto and engageable with selected teeth of said bar and having a portion projecting laterally beyond a side face of the bar; and a latch-operating element mounted normally out of contact with said bar and latch but adapted for movement into engagement with said latch projecting portion for disengaging the latch from the toothed bar without moving the a portion projecting laterally beyond a side face of the bar; and a latch-operating element mounted on said frame independently of the carriage and out of contact with said bar and being adapted to move into engagement with said latch projecting portion for disengaging the latch from the toothed bar without moving the bar-mounted stop, the latch-engaging portion of said operating element being provided with means adapted to interlock with said latch projecting portion for maintaining the latch and bar-mounted stop' against movement relative to the frame in the direction of letter-spacing movement of the carriage.

3. In a typewriting machine, a frame; a carriage mounted on the frame for letter-spacing movements; a toothed stop bar on and at the rear of said carriage; a stop on said frame; a cooperating stop mounted on and for sliding adjustment movement longitudinally on said bar;

,a latch mounted on said bar-mounted stop for movement relatively thereto and engageab e with selected teeth of said bar and having a portion projecting laterally beyond a side face of the bar; and a latch-operating element mounted on the frame for movement into engagement with said latch projecting portion for disengaging the latch from the toothed bar without moving the barmounted stop; a finger piece mounted on and at the front of said frame independently of the carriage and accessible to the operator; and means mounted on said frame independently of the carriage and connecting said finger piece to said latch operating element;

4. In a typewriting machine, a frame; a carriage mounted on the frame for letter-spacing movements; a toothed stop bar on said carriage; a stop mounted on and for sliding adjustment movement along said bar; a latch mounted on said bar-mounted stop for movement relatively thereto and engageable with selected teeth of said bar and having a portion projecting laterally beyond a side face of the bar and a latch-operating element mounted out of contact with said bar and carriage parts and being adapted for movement into engagement with-said latch projecting portion for disengaging the latch from'the toothed barwithout moving the bar-mounted stop, said element being formed with a slot extending transversely to the direction of letterreceive the latch projecting portion in interlocking engagement therewith for holding the latch and bar-mounted stop against movement rela- I spacing movement of the carriage and adapted to ing movement of the carriage.

5. In a typewriting machine, a frame; a carriage mounted on the frame for letter-spacing movements; a stop bar on said carriage and having teeth along its upper face; a stop on said frame; a cooperating stop mounted on and for sliding adjustment movement along said bar; a latch mounted on said bar-mounted stop for movement relatively thereto and having a nose engageable with selected teeth of said bar; and a latch operating finger mounted on, the frame for upward movement for engagement of a portion thereof with said latch nose for lifting the latter of! said bar without moving the barmounted stop, a portion of ,said finger being adapted to be coupled to the latch for retaining the latch and bar-mounted stop against movement relative to the frame in the direction of letter-spacing movements of the carriage, and said finger having a cam edge disposed in a vertical plane parallel to the line of carriage travel and extending upwardly and inwardly toward the latch-nose-engaging portion of the finger.

6. In a typewriting machine, a main frame having front and rear walls; a carriage mounted on the frame for letter-spacing movements; a stop bar mounted on and at the rear of. the carriage, said bar having teeth along its upper edge; a stop on said frame; a cooperating stop mounted on and for sliding adjustment movement along said bar; a latch mounted on said bar-mounted stop for movement relatively thereto and being engageable with selected teeth on said bar; a latch operating finger; means for mounting said finger for vertical sliding movement into engagement with said latch forlifting the latch off the bar without moving the bar-mounted stop; operating means connected to said finger and extending fromthe rear wall of the frame through the front wall thereof; and means including a part on said bar-mounted stop and a portion of said finger for coupling said finger to said bar-mounted stop when said latch is lifted.

7. In a typewriting machine, a main frame having front and rear walls; a carriage mounted on the frame for letter-spacing movements; a stop bar mounted on and at the rear of the car riage, said bar having teeth along its upper edge; a stop on said frame; a cooperating stop mounted on and for sliding adjustment movement along said bar; a latch mounted on said bar-mounted stop for movement relatively thereto and being engageable with selected teeth on said bar; a latch operating finger; means for mountingsaid finger for vertical sliding movement into engagement with said latch for lifting the latch off the bar without moving the bar-mounted stop; means for lifting said finger; spring means urging said finger downwardly; and means including apart on said bar-mounted stop and a portion of said finger for coupling said finger to said bar-mounted stop when said latch is lifted.

8. In a typewriting machine, a frame; a carriage mounted on the frame for letter-spacing movements; a margin stop bar on said carrage; a stop on said frame; a pair of margin stops mounted on and for adjustment along said bar; releasable means mounted on said bar-mounted stops respectively for movements relatively thereto and for maintaining the bar-mounted stops against movement along said bar; and separate actuating means mounted onsaid frame independently of said carriage on opposite sides of the frame-mounted stop and being interlockingly engageable respectively with said releasable means for moving the latter relatively to the associated bar-mounted stop to thereby release the latter for adjustment relatively along said bar and for maintaining the said bar-mounted stop against movement relative to the frame in the direction of letter-spacing movements.

9. In a typewriting machine, a frame; a carriage mounted for letter-spacing movements on the frame; a margin stop bar on the carriage;

a line lock lever movably mounted for limited movement on the frame adjacent said stop bar; a margin stop element mounted on and for adjustment along said bar and being adapted to cooperate with the line-lock lever for limiting movement of the carriage; means for releasably locking said stop element to said bar in adjusted position; an operating member; and connecting means common to the operating member, the locking means and the line-lock lever for releasing the locking means and for displacing the line-lock lever from the line of adjusting move-. ment of the stop element along said bar.

10. In a typewriting machine, a frame; a carriage mounted for letter-spacing movements on the frame; a center stop movably mounted on the frame; a line lock lever mounted for limited movement on the center stop; a carriage escapement mechanism; tabulating mechanism including a tabular stop mounted on the carriage, a tabulating finger mounted on the frame for movement into the path of the carriage-mounted tabular stop, a tabuiator key, and motion-transmitting means controlled thereby for releasing said escapement mechanism and moving said tabulating finger into the path of said carriagemounted tabular stop; a margin stop bar on ,said carriage; a margin stop mounted on and for adjustment along said bar and being adapted to cooperate with the center stop and line lock lever for .limiting -movement of the carriage; means for releasably locking said margin stop in adjusted position on said bar, the center 1 stop and line lock lever being normally in the path of said margin stop and being adapted to be moved out of the path of the margin stop; means connecting said center stop to said tabulating finger for moving the center stop and line lock lever out of the path of the margin stop in response to operation of the tabulator key; and margin stop setting means comprising a device for releasing said releasable locking means and for holding said margin stop against movement relative to the frame, an actuating key connected to said device, and a lostmotion connection between said actuating key and said motion transmitting means effective in response to'operation of said actuating key for moving said center stop and line lock lever out of the path of the margin stop without releasing said escapement mechanism.

11. In a typewriting machine, a frame element; a carriage element mounted for letterspacing movements on the frame; carriage travel limiting means including a stop mounted on one of said elements, a margin stop bar mounted on the other of said elements, a margin stop mounted on and for adjustment along said bar, and

means for releasably locking said margin stop in being actuated thereby; an operating member;

and connecting means common to the operating member, the locking means, and the line-lock device for releasing the locking means and for displacing the-line-lock device from the path of v the can'iage-element-mounted stop.

12. In a typewriting machine, a frame element; a carriage element mounted thereon for letter-spacing and retum' movements; type action and spacing mechanism including a linelock device mounted for movement into operative and inoperative positions; cooperating stops supported on the frame element and carriage element respectively, one of said stops being mounted for adjusting movement relatively along its support; releasable means for locking said adjustably mounted stop in adjusted position. on its support; stop-setting means for actuating said releasable means to 'unlock said adjustablymounted stop to permit its moving relatively along its support; and operating means connected to both said stop-setting means and said linelock device and operable to both move said linelock device to inoperative position and to operate said stop-setting means to unlock said adjustably-mounted stop from its support.-

13. In a typewriting machine, a frame; a carriage mounted on the frame 'for letter-spacing P movements; a margin stop bar on said carriage;

a stop on said frame; a pair of margin stops mounted on and for adjustment along said bar; releasable latches mounted on said bar-mounted stops respectively for movements relatively thereto and engageable with said bar for maintaining the bar-mounted stops against movement along said bar; and separate actuating means mounted on said frame independently of said carriage on opposite sides of the frame-mounted stop and being formed with slots interlockingly engageable respectively with said latches for moving the latter relatively to the associated bar-mounted stop thereby to release said bar-mounted stop for adjustment relatively along said bar and for maintaining the said bar-mounted stop against movement relative to the frame in the direction of letter-spacing movements.

14. In a typewriting machine, a frame; a carriage mounted on the frame for letter-spacing movements; a margin stop bar on said carriage; a stop on said frame; a pair of margin stops mounted on and for adjustment-alongsaid bar;

releasable means mounted on said bar-mounted stops respectively for movements relatively thereto and for maintaining the bar-mounted stops against movement along said bar; separate fingers mounted for selective independent V61? tical sliding movement on said frame independ ently of said carriage on opposite sides ot'the frame-mounted stop and being interlockingly engageable respectively with said releasable means for moving, the latter relatively to the associated bar-mounted stop thereby to release the latterfor adjustment relatively along said bar and for maintaining the said bar-mounted stop against movement relative to the frame in the direction of letter-spacing movements; spring means urging said fingers to positions out of engagement with said releasable means; and manually operable frame-mounted means for moving saidfingers selectively into engagement with the respectively associated releasable means.

15. In a typewriting machine, a frame; a carriage mounted on the frame for letter-spacing movements; a toothed margin stop bar on said carriage; a stop on said frame; a pair of margin stops mounted'on'and for adjustment along said bar; releasable latches mounted on said bar- -mounted stops respectively for movements relatively thereto and engageable with the teeth on said bar for maintaining the bar-mounted stopsagainst movement along said bar;' and separate fingers mounted for selective independent movement on said frame independently of said carriage on opposite sides of the frame-mounted stop and being formed with slots interlockingly engageable respectively with said latches for moving the latter relatively to the associated bar-mounted stop thereby to release said barmounted stop for adjustment relatively along said bar and for maintaining the said barmounted stop against movement relative to the frame in the direction of letter-spacing movements, each of said fingers having an inclined cam edge adapted to release the latch of the associated stop if said latch is moved parallel to the direction of carriage letter-spacing movement into engagement with said finger when the finger is in its operative position.

LEWIS CARY MYERS.

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