US1469777A

US1469777A - Typewriting machine

Info

Publication number: US1469777A
Application number: US588045A
Authority: US
Inventors: Mansfield C Crawley
Original assignee: ADDOGRAPH CO
Current assignee: ADDOGRAPH Co
Priority date: 1922-09-13
Filing date: 1922-09-13
Publication date: 1923-10-09
Anticipated expiration: 1940-10-09
Also published as: FR559084A; GB224403A

Description

M. C. CRAWLEY I TYPEWRITING MAQHINE Filed Sent 13. 1922 8 ts-sneet 1 1{VVENTOR V c. AIWW? ATTORNEYS 1,469,777 M. C. CRAWLEY TYPEWRITING MACHINE Filed Sent 13 1922 8 Sheets-Sheet 2 Inga/ 01: BY

ATTORNEYS Oct. 9 1923.

M. c. CRAWLEY TYPEWRITING MACHI- IE Fil Sent. '15. 1922 8 Sheets-Sheet s I INVENTR J A TTORNE Ys' M. C. CRAWLEY TYPEWRIT ING MACHINE Filed Sent. 1;. 1922 8 She's INV ,JR BY ZZM-ZwW ATTORNEYS Oct. 9 1923.

M. C. CRAWLEY TYPEWRITING MACHINE File d Sept; 13

I INVENTOR v ATTORNEYS M. C. CRAWLEY TXPEWRITING MACHINE.

Oct. 9 1923. 1,469,777

' Filed Sent. 13. 1922 8 Sheets-Sheet 6 fl llllhllfl llllllmllfihlllilllmllllll'lfl mim Tumm

INVENTOR (T 7% BY. ATTORNEYS Patented 0st. 9, 1923.

-MANSFIELD C. CRAWLEY, OF GROTON, NEW YORK, ASSIGNOR TO ADDOGRAPH COM- PANY, OF LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

'rvrnwnirms MACHINE.

Application filed September 13, 1922. Serial No. 588,045.

To all whom it may concern:

Be it known that I, MANSFIELD C. CRAW- LEY, a citizen of the United States of America, and a resident of Groton, county of Tompkins, and State of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a full and clear specification.

The special object of this invention is to provide key controlled power operated means for actuating the carriage as Well as the platen. The particular embodiment of the invention disclosed herein is especially adapted for use in connection with the power-operated type-bar action disclosed in. my former Patent, No. 1,156,061, dated Oc tober 12 1915, in which a universal typebar-actuator is actuated on its working stroke by means of a spring and a continuously-running power-shaft is employed for retracting the actuator after each working stroke, latching devices being employed to hold the actuator back after it is retracted and key-controlled means being employed for releasing said latch whenever a punting-key or space-key is actuated.

In the drawing- "1 Fig. 1 is a vertical sectional view of a type-Writing machine embodying my invention;'

Fig. 2 is a vertical transverse sectional view looking rearward;

Fig. 3 is a perspective view of certain essential mechanisms, the frame and some of the mechanisms of the machine being omit-ted for purposes of better illustration;

Fig. .4 is a detail front elevation of the essential parts of the carriage-return and line-spacing mechanisms; 7 M

Fig. 5 is a vertical sectional view of the same;

Fig. 6 is a plan view in detail of the devices for locking the printing instrumentalities; A Figs. 7, 8 and 9 are detail views especially intended to illustrate the carriage locking and unlocking devices;

i Fig. 10 is a detail sectional view of the carriage running gearing;

Fig. 11 is a front elevation, partly in vertical section, showing the paragraph-stop setting devices in normal position;

Fig. 12 is a detail front elevation, partly in section, showing more particularly the opnstruction and arrangement of the carriage-stopping devices; I

Fig. 13 is an inverted. plan view, partly broken away, of the front part of the carhand margin stop and the righthand margin stop, respectively,*in action.

Referring to the drawing annexed (8 sheets) by reference-numerals, 20 desighates the fore and-aft reciprocating universal curved type-bar-actuator which is suprted on rock-arms depending from the rock shafts 10 and adapted to be thrown forward by a spring 11 to actuate the typebars through push-couplers 21, a pull-back link 22 and a crankshaft '23 being employed for retracting the actuator against said spring 11. This crank-shaft 23 is journalled in bearings 12 and is provided with a stop-arm 24 which is adapted to engage a spring-held stop -2;5..ciarried by a vertical latch-lever 26 pivoted at 27 in the machine frame, this latch-lever being connected by means of a link 28 to a curved universal release-bar 29 suspended on arms depending from a rock-shaft 13. A ratchet-wheel 30 is fixed on a shaft 31, which is continuously driven by a belt 32 driven by an electric motor 33. Shaft 31 is coaxial with shaft 23 and is journalled' in bearings 14 on the machine frame. The release-bar 29 is adapted to be cammed backwardly by cam surfaces 34 on the push-couplers 21 when said couplers are raised through the medium of the pushbars 35 operated by the printing key-levers 15 of the machine. The rearward movement of the release-bar forces the lever arm of latch-lever 2 6 backw'ardly far enough to release the stop-arm 24 on crank-shaft 23, whereupon the sprin 11 in the actuator mechamsm forces t e type-bar-actuator forwardly to cause a printing operation. At the proper moment, a pawl 36 pivoted on arm 24 is caused to engage in the teeth of ratchet-Wheel 30, to thereby rotate shaft 26 in a direction to retract the type-baractuator and cause it to be again latched in its rearward positiomthe latch-lever 26 having meanwhile been forced forwardly to bring its stop into the path of the arm 26 by means of its actuating spring 37. The foregoing mechanism is fully disclosed in my (so-pending case Serial No. 577,362, filed July 25, 1922, and therefore need not be further described herein The line spacing mechanism disclosed herein is more fully disclosed in my cop'ending application Serial No. 577 ,358, tiled Jul 25, 1622, and 11 will, therefore, but" brie, y describe it herein. This mmhan-ism embodies a driving friction clutchdish 88 attired to the aforesaid continuouslyrunning shaft 31; a driven-friction disk 39 loosely mounwd on said shaft 31 which is in position to be frictionally engaged with the timed member 38; a pivoted resilient lever 4:6 for bringing about said engagement; and angular lever 1-1 for actuating the aforesaid lever 16; and a lreydever 4:2 for actuating the levers t1 and 46 to press clutch disk 39 against clutch disk 68, Atlixed to the clutch-member 39 is a pinion 13, and held in constant engagement with this pinion is a segment 1% which is provided with a pair of depending stop-arms 45 or 'vhich also is connected by a pivotal link 46 to a depending rock-arm 47, this arm t7 being afiixed to one end ot a sheet-metal rock-shaft 18 whose opposite end is provided with an upwardly-extending arm 49 adapted to have constant engagement with a swinging frame 56 mounted on the carriage. The frame 56 carries an upstanding arm 51 which at its upper end is pivotally connected to a line-spacing pawl 52. With this construction, it will be observed that the depression of the line-spacing lever 12 will.

put the friction clutch into action and thus swing the lower end of the depending lever' 41-7 forwardly throu h the medium of the segment a l and the ink 46; this will, as is obvious, cause a line-spacing action of the platen through the rotation of the line-space ratchet-wheel 16 by pawl 52. A spring 53 returns the parts to-normal position as soon as the operator frees the clutch by releasing the key-lever d2. The opposite face of the fixed or driving clutch disk 38 is utilized for actuating the ease-shift mechanism. For this purpose, 1 provide another loose disk 54: similar to the disk 39 and hav ng aflixed to it a pinion 55 in constant engagement with a segment 56 similar to segment 44. A resilient clutchactuating lever 57 is provided which lever is formed of resilient metal and adapted to be actuated by an angle-l ver 58 through the medium of a shift key-lever 59 to press the disk 5% against disk 38.

When the shift key-lever 59 is depressed,

neearvr the clutch-members 5d and68 will be frictionally engaged, and, through the medium of pinion 55 and its meshing segment 56, a case-shift action will take place, said segment operating a crank mechanism 17 through a link 18 to lift the platen supporting shift frame 19, as more fully shown and described in my copending application Serial No. 577,357, filed July 25, 1922, said shift frame moving up and down in the rectangular frame 119 of the platen car riage and partaking of the transverse movement of the carriage along the

guide rails

120 and 90 on the machine frame 121.

The carriage is provided with a rack-bar 60 which extends the length of travel of the carriage and is in constant engagement with a pinion 61 affixed to the upper end of a vertical shaft 62 journalled in a bearing 122 on the machine frame and whose lower end carries a bevel-pinion 63. Meshing with this bevel-pinion 63 are two bevel-gears 64-65 loosely mounted on the aforesaid drivingshaft 31. Fixed to the outer faces of gears 6d and 65 are conoidal clutch members 123. Friction clutch disks 66 are affixed to the shaft 31 in sufficiently close roximity to the outer faces of members 123 to ensure a triotional driving engagement between the companion clutch members when

gears

64 and 65 are pressed slightly outwardly without (lo-meshing from pinion 63. A pair of resilient levers 67-68 are pivoted at 124 on the machine frame below the gears and they have their forked upper ends, respectively,

positioned to engage the inner'faces of the respective gears 64-65, so that when the depending resilient end of either lever 67--68 is swung inwardly, the loose clutch member 123 fixed to the loose gear engaged by the-lever will be frictionally engaged with its companion driving clutch member 66 and be thereby rotated. With this simple mechits end at 125 on the frame and adapted to be swung upwardly by the rear-end of the advance-key-lever 70 to cause the inner end of the sub-lever to press inwardly against the lower end of clutch lever 68. The inner end of the lever 69 is curved outwardly upon itself to provide an outwardly-downwardly facing cam edge 71 for a purpose hereinafter described. For actuating the carriagereturn clutch-lever 67, I provide a,.,transverse sub-lever 72 pivoted at 126 on the machine frame and whose outer end is adapted to be swung upwardly by either the keylever 7 3 or the key-lever 113, said sub-lever transverse sub-lever 69 pivoted intermediate 72 being provided with' an arm 72 for operating clutch lever-I67 and an inwardly-extending arm 74 adapted to depress an arm 75 extending inwardly from the aforesaid line-space sub-lever 41, whereby when either of the key-levers 7 3 and 113 is actuated to return the carriage, there will be a simultaneous operation of. the line-spacing mechanism, as shown in Fig. 4.

The letter-feed movement of the carriage is accomplished through the same pinion (61) which is employed to give the carriage a running movement. This letter-feed mechanism is fully disclosed in my co-pending application Serial No. 588,046, filed September 13', 1922. It consists generally of a star-wheel 7 5' aflixed to the shaft 62 and adapted to he stepped around by means of a pair of pawls 76- 7 to advance the carriage in letter-feed direction through pinion 61 and rack 60. Thepawls are adapted to be reciprocated I through the medium .of the movement (if the type-bar-actuator 20, pivotal links 78 being employed for connecting the pawl-carrying arms 127 tothe actuator to swing said arms about the axis of shaft 62. It is sufiicient in this case to state simply that normally pawl 77 is out of engagement with the feed star-wheel, while the companion pawl 76 normally engages in one of the notches of the wheel (as shown in Fig. 9) and thereby serves to lock the carriage against movement in either direction. it will be understood that the letter-feeding of the carriage is not accomplished through the power driving gears 636465, but solely through the action of the type-baractuator and the connected mechanism above briefly described. During letter-feed of the carriage, both the drive-gears 64-65, altho in mesh with the bevel-pinion 63, are out of driving connection with their respective clutch members 66, thereby leaving the pinion-shaft 62 free to be rotated by the letterfeed. Briefly, the carriage is fed one-half letter-space by pawl 76 on the forward stroke of the actuator 20 which pulls forward by a hook 128 a lever 129, this lever being pivoted on the actuator at one end and links 78 being pivoted at their forward ends to the other end of this lever 129. Lever 129 is caused to move rearward on the return stroke of the actuator by the stiff spring 130 to cause pawl 77 to feed the carriage another one-half letter space. A plate or shield 131 controls the action of the pawls on the wheel 75.

' It will be obvious that whenever the carriage is given a running movement in either direction, it is essential that the locking pawl 76 be disengaged from the star-wheel to permit the star-wheel to rotate with the shaft 62. For this purpose, I pivot on the shaft 62 a short escapement-release lever 79 in position to have one of its arms engage pawl 76 and its other arm to be engaged by the upper arm of a vertical lever 80 pivoted at 132 on the machine frame, the lower end of said lever 80 having a laterally-bent lug 81 adapted to be engaged by the aforesaid cam edge 71 on lever 69 when lever 69 is act'uated by the advance-key lever 70. In this way, it will be observed that when the advance-key is actuated, as shown in Figs. 7 and 8, to give the carriage a running movement toward the left, or in letter-feed direction, the

levers

80 and 79 will cam the pawl 76 out of engagement with the starwheel 7 5 and hold it out so long as the advance-key on key-lever'70 is held depressed by the operator. By mechanism hereinafter described this carriage-locking pawl 76 will also be unlocked when the combined carriage-return and line-space key-lever 7 3 or the combined paragraph-stop control, carriage return, and line-space key-lever 113 is actuated, .to thereby permit the carriage to be returned by a running movement toward the right.

In addition to unlocking the letter-feed Whenever the carriage is given a running movement, it is desirable also that the printing instrumentalities be locked against actuation, this being particularly desirable in a machine where, as in the present instance, the printing mechanism is designed to be put into action by as lighta touch as is feasible. For this purpose, I employ a lockingbar 82 slidably guided on the frame, to move horizontally, at a point where, when it is moved to the' right, it will lie in front of the latch-lever 26 at a point above its pivot 27 and thus lock the latch-lever against actuation by the universal release-bar 29. The locking bar 82 is held in place and guided on the frame by pin-and-slot'connections 83, and is provided with a pair of lugs 84 which are so positioned as to engage'opposite edges of the upper end of the before-described lever 80, so that when the upper end of said lever 80 is swung to the right by means of the advance-key lever 70 and sub-lever 69, the bar 82 will be pushed into locking position and beheld there while the advance key is held down, i. e.. until the advance movement of the carriage is completed. It is desirable also to bring about this locking operation whenever the carriage is manually run back or forth; I accomplish this by attaching to the depending line-spacer rockarm 47 a link-bar 85 whose rear end is provided with a cam-edge 86 adapted to impinge against an upstanding lug 87 on the bar 82, thehrrangement being such that when the link-bar 85 is pulled forward, the locking-bar 82 will be cammed into locking position, as shown in Fig. 6. This movement to the right of the bar 82 by the link 85 performs another function as hereinbefore described, to wit, actuation of the car.-

riage-unlocking lever 79 through lever 89, to thus release the carriage from the letter feed or escapement devices. Link-bar 85 is this 1 provide a finger-piece or manual carriage-release key 88 on the rearwardprojerting end of the pawl, which finger-piece may. of course, be employed also for pulling back the arm 51 simultaneously with the throwing out of the line-space pawl. In this connection, it will be understood that the arm 49 has constant interlocked connection 134 with the line-spacing rail 89, which extends the full length of travel of the carriage, so that the release of the carriagelock and the actuation of the lock bar 82 may be accomplished at any point in the travel of the carriage; and it will be understood also that the forward swinging of the lever 47 by key 88 produces merely an idle operation of the segment 1 i and its associated pinion 4-3 and loose clutch-member 39.

It will be observed also that by attaching the link 85 to a member (preferably lever 47) of the line-spacing mechanism, 1 provide thereby for unlocking the letter-feed and locking the type-bar-actuator through the medium of the line-space mechanism whenever the carriage-return lever 73 or the paragraph-key-lever 113 is actuated, since, it will be remembered, actuation of either one of these levers automatically and simultaneously puts into operation the powerdriven line-spacing mechanism through the medium of the

lever arms

74, 75.

For stopping the running of the carriage in its advance movements as wellas in its return movements, ll employ the following devices: I attach to the underside of the front guide rail 90'for the platen carriage 119, which rail is fixed on the machine frame parallel with and adjacent to a scale plate 91 on the front transverse member of the carriage, afiat spring 92 preferably composed of two leaves, the left-end of this spring being rigidly anchored to the guide rail at 135 and the right-end being free to flex away from the bottom side of the rail. Mounted on the front face of the rail 90 is a rocking-bar 93, this rocking bar being secured to the rail midway the travel of the carriage by means of a pivot 94 anchored in the front face of the rail. This bar-like member 93 has its nder edge resting upon or closely adjacent to the upper side of the spring 92 adjacent the free end of said meager spring, so that when the bar is rocked on its pivot 94, one horizontal arm. or the other thereof will be swung downwardly to thus causethespring to be flexed downward against its normal tendency to lie fiat against the under face of rail 90. The arm of this rocking member which extends toward the free end of the spring 92 is longer than the other arm, to compensate for the fact that it engages the spring at a more distant point from the fixed end thereof than is engaged by the other arm, whereby the leverage exerted to flex the spring is approximately the same whichever way the rocking member is rocked. This rock-bar 93 is provided, at a point coincident with its pivoted point, with an upstanding arm 95 which is adapted, through a tappet or centrally located arresting device 107 (hereinafter described), to receive the thrust of the ll greatly reduce noise and vibration of the a machine parts. 'llhus cushioning the carriage is, of course, desirable only when the carriage is given a running movement to its stopping point, since, when the carriage is fed for letter-spacing, its feed or escapement means will effectively, control its movement.

The carriage-return or left-hand marginregulating stop 96 comprises a main flat sheet metal body-portion provided at one end with a forwardly extending lug 136 to which is pivoted at 137 a bell-crank locking and adjusting lever 98 having its short for wardl extending arm connected by a spring 138 wlth a forwardly extending stop-lug 99 at the opposite end of the flat body portion of the stop adapted for engagement with the part 107 of the aforesaid t-appet 107 on the buffer rocker 9395. The transversely ex tending long arm. of lever 98 is provided with a vertical arm or finger-piece 190 which extends up through a slot 139 formed in the front cross member of carriage 119 parallel with and adjacent the upper edge of scale plate 91. lhe arm 100 is bent downwardly and forwardly and formed into a pointer 101 which lies adjacent to the graduations on adapted to engage in notches in the forward edge of a transverse bar 97 rigidly supported under the front cross member of carriage 119 and spaced therefrom by suspending means 140, said bar being parallel with slot 139. The carriage-advance arresting stop 102 is constructed similarly to the returnstop 96, except that its stop-lug 103 is constructed and positioned during letter-feed to impinge and ride upon the stepped upper edge of a pivoted lever 104, for the purposes set forth in my co-pending application Serial No. 592,525, filed October 25, 1922.

When the carriage is given a runnin movement in advance direction, the stepped lever 104 is pushed down out of the way by the lower end of stop lug 103 to thereby permit stop-lug 103 to directly strike the part 107 of the stopping tappet 107, to thereby bring the cushioning spring 92 into action and arrest the carriage 119.

The foregoing carriage-arresting stop devices serve to arrest the carriage at the extreme ends of its predetermined transverse,

movement. It is desirable at times to arrest the return movement of the carriage at a point short of that for which the left-hand margin stop 96 is adjusted, as, for instance, where it is desired to arrest the return of the carriage in position to start a new paragraph. For this purpose, I provide another adjustable stop 105 on the rack-bar 97 this paragraph stop being constructed similarl to the other stops hereinbefore describe except that its stop-lug 106 is in a plane sufliciently lower than the stop-lug 99 on the return-stop 96 to permit it to normally pass under the part 107 of the stop-tappet 107.

Tappet 107 is vertically slidable on arm 95,

the screw 94 passing through a slot 142 in the ta-ppet and said arm 95 having its reduced upper end extending through an aperture 143 in part 107 otthe tappet. When the tappet is lowered sli htly, part 107 will lie in the path of the a oresaid paragraphstop lug 106 and receive the thrust of the stopping 'movement thereof and transmit that thrust to the arm 95 of the thrust-receiving rocker. This stop-tappet is adapted to be lowered into operative position by means ofthe aforesaid lever 104, which lever supports this stop-tappet in its up position by means of a lug 108, the lever 104 being normally held up by a spring hereinafter described. The lever 104 is pivoted to the rail ,90 at 144 near the left side of the machine frame 121 and extends to a point near the opposite side of the frame, its free r end 109 being bent so as to lie underneath the top of the main frame- Loosely engaged under said free end 109 of l'ever 104 is the forward end of a vertically swinging lever 110 pivoted on'the frame at 145, and pivotally connected to this lever110 at 146, is a depending link 111 to the lower end of which is connected the upper end of a rod-link 112,

whose lower end ispivotallyconnected to the paragraph-key lever 113. When the-key on the paragraph-key lever 113 is depressedthe free end of the stepped lever 104 will be pulled down a ainst' the the action of a'coilspring 114 an remain down only so long as the paragraph-key is held depressed. Spring 114 connects link 111 with the machine frame and normally holds said link and levers 110 and 104 up so as to hold the gravity tappet'107 up. It will thusbe seen that by depressing the key on the paragraphkey lever 113, the paragraph stop-lug 106, when the carriage is iven a running movement in return direction, will strike against the tappet 107 and thus stop the carria e, with a cushioning efiect, at the point set or a new paragraph. I By arrangin this paragraph-kc 113to engage subever 72, it

v will be 0 served'that its operation will rem der the paragraph-stop effective and also put into action at the same time the carriage-return mechanism and the line-spacing mechanism, it being remembered that the operation of the line-spacing mechanism in this manner brings about not only a locking of the printing instrumentalities but also unlocking of the carria feedr It will be observed'a so that if as usual, 1

the paragraph is tobe started with a capital letter, the platen-shift-key-lever 59 maybe operated at the same time key-lever 113 is operated, to thereby bring about simultaneously a fourfold preparatory operation of the machine, i. e., carriage-return, paragraph-stop,line-spacing, and case-shift, the construction being such that all these operations are performed by power taken from a single continuously-running power-shaft.

With regard to the stop-tappet 107, it will be observed that it normally rests upon the upper edge of the lever 104 and that it falls with said lever by avity when said lever is lowered. A. suitab e spring, however, may be employed for ensuring prompt downward movement of the tappet when the lever 104 falls. .This stop-tappet 107 is desirably formed of a piece of sheet-metal whose upper end is bent rearwardly and then upwardly and provided with the hole 143 up through which the upper reduced 7 end of the thrust-lug 95 passes, this reduced and together with pivot 94 serving to guide the tappet in its vertical movement. 11 its normal osition, as stated, the upper angular portion 107 of the'stop-tappet 107 is in horizontal alinement with the stop-lug 9.9 on stop 96 and out of alinement with para graph-stop-lug 106, so that said paragraph stop lug 106 will pass underneath the rearwardly bent part of the tappet, without striking the same and. to the rear of the thrustlug 95, until the tappet is lowered by the paragraph-key. The stops 96, 102 and 105 are each provided with a channel front flange147 and a channel rear flange 148 for slidably supporting and guiding the stops on bar 97. Each ,of said stops is adjustable along :the bar by pulling forward on fingerpiece 100 until nose 141 leaves the notch engaged thereby and abuts gagalnst a stop shoulder 149 on the stop, whereupon the finger-piece is moved along slot .139 unt l pointer 101 is at the desired position and 1S then released. I

machine of this character where the-case-p shift actions, the line-spacing actions, and the carriage-running actions are completed at different times and before the operator releases the key. In this way, all jars and.

injurious jamming strains on the power mechanism are eliminated, and this result is materially promoted by making the depending portions of the clutch-actuating le vers 4:0, 57, 68, 67 slightly resilient and also, of course, by providing the usual stop for the key-leverswhich actuate said clutch-levers, these key-lever stops serving to prevent any excess of pressure being put on the slip clutches. In this connection, it will be observed that the carriage-running gears 64:, 65 are in constant mesh with the driven-gear 63 and that, therefore, these driven-

gears

64, 65 will receive an idle rotation during letter-feeding. By thus arranging the

gears

64, 65 to have constant mesh with the drivengear 63, it will be observed that T avoid the trouble that might ensue by meshing and demeshing the gears with each operation. The

gears

64, 65 are held in constant mesh with the driven-gear 63 by so positioning the driving members 66- of the clutches that there is insuliicient space to permit the

gears

64, 65 to be disengaged from the driven-gear 63 even when the clutch members 123 held to said gears are pressed closely in engagement with said clutch-members 66. It will be understood also that when the clutch associated with either one of these

gears

64 or 65 is in clutched relation the other one of said gears receives an idle rotation. To en sure a delicate and yet sufiicient frictional engagement, I make the metallic loose clutch members 123 in. the form of conoidal cups to adapt said members to engage the conical peripheries of their companion clutch-disks 66, these clutch-disks 66 being desirably made of fiber. The loose clutch disks 69 and 54 of the line-spacing and case-shift clutches, respectively, are similarly formed, and the intermediate duplex cone clutch-member 38 is likewise desirably made of fiber material. These frietion-

disks

39 and 54 and 123 are desirably radially slotted at 118, to

thereby provide scraping edges which work age lightly on the conical periphery of the fiber disks to thereby keep the same scraped cleanof oil and dust, and thus ensure an efi'ective operation of the clutches even after long usage of the machine.

As it is under certain conditions desirable that the carriage should be returned or partly returned without line-spacing the platen, I provide a key-lever 150 adjacent the key-lever 7 3for this purpose. Said keylever 150 engages under the outwardly ex-.

lever 67, and is also provided with an arm 153 having a cam edge 154'adapted to ride over the lug 81 at the lower end of lever to actuate the carriage-release lever 79 andthe type-bar-actuator lock 82. It will thus be seen that key-lever 150 operates the carriage-return clutch, the escapement-release, and the lock for the printing mechanism,but does not operate the line-space mechanism as sub-lever 151 has no arm corresponding with arm 74 pf sub-lever 72.

A spring 155 connecting release lever 79' with a fixed part on the machine frame serves to restore said lever, the slide 82, and lever 80 to normal position after all operations of said parts in the several "ways hereinbefore described. A spring 156 connecting the

clutch levers

67 and 68 serves to yieldably hold said levers in normal release position, and this spring 156 and spring 155,-

above described, serve 'to assistthe weight of the long outwardly extending arms of the transverse sub-levers 69, "72and 151 to promptly restore the sub-levers to normal position whens the key-levers are released.

A pawlv controller 157 pivoted on the ca-rriage at 158 serves to hold the pawl 52 normally out of the ratchet 16, said pawl riding up over the laterally bent upper end of the controller 157 as it returns to its normal forward position, shown in Figs. 1 and 2.

en the pawl is pulled rearwardly it drops into the ratchet. When the controller is in its forward position, shown, the pawl will rotate'the ratchet two-tooth spaces before striking stop 159 on the carriage. The controller is adjustable rearwardly about its pivot to a point where it will hold pawl 52 out ofthe ratchet until it moves back far enough to drop into the first ratchet tooth forward of stop 159, thus causing a singlespace rotation of the platen.

The escapement mechanism may be 'reversed or adjusted to feed the carriage in the return direction, toward the right, by

Whenthe key on this lever is depressed the lever pushes up a link 161, which rocks a plate 162, pivoted at 163 on the-frame, in a direction to push alink 164'toward the left. Link 164 is connected at its inner end to the rearwardlyextending arm of cam plate 131. Movement of the parts just described is limited by a stop pin 165 engaging in a slot in plate 162. The reversing means is restored by a spring 166 when the back space key is released. The actuator 20 may be tripped to feed the carriage, when key lever 160 is actuated, by operation of' any of the type keys, or it may be tripped by the space bar as shown in Serial No. 588,046, filed September 13, 1922, above referred-to.

In this case I make no claims for the caseshift mechanism separately, as that mecha-- nism is specifically covered in my co-pending application Serial No. 577,357, filed July 25, 1922. In this case I make no clalms for the line-spacer separately, as that mechanism is specifically covered in my co-pending application Serial No. 577,358, filed July 25, 1922. In this case I make no claims for the type-bar action, as that.mechanism is specifically covered in my co-pending application Serial No. 577,362, filed July 25, 1922.

In this case I make no claims for the carriage-feeding mechanism, as that mechanism is specifically covered in my co-pending application Serial No. 588,046, filed September 13, 1922. i

What I claim is: 1. In a typewriting'machine, a continuously-driven power-shaft, key-controlled means for operating the line-spacing mechanism of the machine from said shaft embodying a slip-clutch adapted to be put into action and held in action by the key, anda carriage-returning mechanism adapted to be put into action by the same key simultaneously with the line-spacing mechanism and also embodying a slip-clutch adapted to be put into action and held in action by the 2. In a typewritin'g machine, a continuously-djtiven powejg shaft, key-controlled means for operatingthe line-spacing mechanism of the machine from said shaft embodying a friction-clutch and a resilient lever for puttingthe same into action and holding it in actlon, and key-controlled carriage-returning mechanism operable from the same key and embod ing a resilient lever and a friction slip-clutch actuated thereby. I

.3. In a typewriting machine, the combination of a carriage, key-controlled powerdriven means operable from a continuously running power-shaft for running said carriage toward the right-hand side of the machine, and power-driven platen rotating mechanism operable independently from the same power-shaft simultaneously with and through the same key that controls the carriage running means.

4. In a typewriting machine the combination of a carriage, a rack thereon, a carriage drive shaft, a pinion on said shaft engaging said rack, a continuously operating main shaft, key-actuated means for connecting the main shaft to the carriage drive shaft to move the carriage in one direction, line-spacing means operable from said main shaft, means whereby the said key will opera-te said line-spacing mechanism to cause it to operate simultaneously with the carriage moving means, and an independent key Y for independently operating the line-spacing mechanism.

5. In a. typewriting machine, the combination of a carriage, a continuously-runningpower-shaft, key-controlled power means operable' from said shaft for giving a running movement to said carriage toward the righthand side of the machine to thus return the same to starting position, independent platen-rotating mechanism operable from the same power shaft to rotate the platen one line-spacing step and operable through the same key that controls the carriage-moving means, and an independent key-for inde-. pendently operating the line-spacing mechanism.

I 6. In a typewriting machine, a frame, a platencarriage, an adjustable margin stop on the carriage, an adjustable paragraph stop on the carriage, a cooperating tappet centrally located on the frame normally in the path'of the margin stop and out of the path of movement of the paragraph stop,-

power means for returning the carriage, and a single ke for moving said tappet into the path 0 said paragraph stop and putting the carriage-returning means into action.

7. In a typewriting machine, a frame. a platen carriage movable transversely of the frame, an adjustable paragraph-stop on the carriage, a cooperating tappet on the frame normally held up out of the path of said stop, and key-actuated means for lowering said tappet into-the path of said stop, said tappet being slidingly mounted upon a thrust ug. 1

8. In a typewriting machine, a frame, a platen carriage movable transversely of the frame, power means for giving the carriage a return running movement, a paragraph stop on the carriage, a paragraph-tappet on the frame normally out of the path of said stop, and key-controlled means for shifting said tappet into the path of the paragraph-stop and also putting into action said carriage-running means,'said tappet being slidingly mounted on a vertical! cushioned thrust lug.

9. Tn a typewriti'ngmachi'ne, a frame, a platen carriage movabletransversely of the frame, a paragraph-stop on the carriage, a cooperating tappet on. the frame, a carriagcsreturn mechanism, a line-spacing mechanism, a case-shifting mechanism all of said mechanisms being capable of operating simultaneously, and key means for putting said mechanisms into action andshifting said tappet into the path of the paragraphstop.

10. In a typewriting machine, a frame, a platen carriage movable transversely of the frame in either direction, an adjustable paragraph-stop on the carriage, a margin return-stop on the carriage out ofalinement with said paragraph-stop, tappet means on the frame for engaging either one of saidstops according to its adjustment, and key-' controlled means for adjusting said tappet means to cooperate with either one of said stops, said tappet being mounted to slide vertically on an 'oppositely-tiltable cushioned thrust lug.

11; In a typewriting machine, a frame, a platen carriage movable transversely of the frame in either direction, a paragraph-stop on the carriage, a margin return-stop on the carriage located at a point to the left of the paragraph-stop and out of alinement therewith, tappet means on the frame for coopcrating with either one of said stops and normally set to co-act with the margin stop, ,and key means for setting said tappet means to cooperate with the paragraph stop, said tappet being mounted to slide vertically on an oppositely-tiltab-le cushioned thrust lug.

12. In a typewriting machine, a frame, a platen carriage movable transversely of the frame, a paragraph-stop on the carriage, a margin return-stop, on the carriage to the left of said paragraph-stop and out of alinement therewith, stopping means on the frame for coperating with either one of said stops embodying a cushioned thrust member, "a tappet normally out of alinement with the paragraph-stop, and key means for adjust ing said tappet into the path of said paragraph-stop, said tappet being associated with the thrust member so'as to communicate ,thrust thereto when either stop strikes the carrying a margin stop and also a paraaaearvr graph-stop, a cushioned thrust-lug on the frame, a vertically slidable tappet slidably mounted on said thrust lug, means for normally holding this tappet up out of the path of the paragraph-stop and into the path of the margin-stop, and key means for lower ing said slidable tappet into active position for the paragraph stop.

'14:. lln a typewriting machine, a frame, a carriage movable transversely of the frame, margin-stops on the carriage, a cooperating tappet centrally located on the frame of the machine, an oppositely-tiltable thrust lug carrying said tappet, and spring buffer means for said thrust lug.

15. In a typewriting machine, a frame, a

margin-stops on the carriage, a cooperating tappet centrally located onthe frame of the machine, and spring buffer means for said central tappet embodying a flat spring and two oppositely-projecting arms connected to the tappet.

16. In a typewriting machine, a frame; a carriage movable transversely of the frame, power means for giving the carriage a running movement in either direction, marginstops on the carriage, a central pivoted tappet structure on the frame for receiving the thrust of both of said stops and thus arresting'the carriage, and spring bufi'er means arranged to permit said tappet structure to yield in either direction according to which stop strikes it. a

17, In a typevvriting machine, a frame, a platen carriage movable transversely of the frame, power means for giving the carriage a running movement in either direction margin-stops on the carriage, a central pivoted tappet=means on the frame for receiving the thrustof, either of said stops and thus arresting the carriage, and spring bufi'er means arranged to permit said tappet means to yield in either direction according to which stop strikes it, said bufier means embodying a hat spring and a pair of arms forming part of said tappet-means.

18. In a typewriting machine, a platen carriage, means for feeding the carriage embodyin a pinion shaft carrying a notched feed-whee and a feed dog normally engaging said wheel to thus serve as a carriage- .lock, key-controlled means for giving the carriage a running movement through said pinion shaft, and devices automatically actuated thereby for unlocking the carriage by disengaging said feed dog from its notched wheel. v

19. In a typewritin'g' ma'chine, a platen carriage, key-controlled power-actua'ted means for giving the carriage a' vrunning movement, ower-actuated carriage-feed devices operahle through a. part of said caradage-running means embod inga carriagelock, and means for unlocking the carrie v esa-7w automatically when the carriage-running means are put into action.

20. In a typewriting machine, a platen carriage, reciprocating power-actuated means for actuating the printing instrumentalities, power-actuated means for giving the carriage a running movement, key-controlled devices for putting either of said means into action, and a locking device for the printing instrumentalities automatically actuated into locking engagement with said reciprocating power-actuated means when the carriage-running devices are put into action.

21. In a typewriting machine, the combination of a platen carriage, escapement mechanism for imparting letter-space movements to the carriage, means the carriage from the escape-ment mechanism. a keyboard key for actuating said re= leasing means, power means controlled by said keyboard key for imparting running movements to the carriage, a power line spacing means, and a key on the carriage operatively connected to actuate said releasing means independently of said power carriage-running means and through said linespacing means.

22. In a typevvriting machine, the combi nation of a platen carriage. a platen on the carriage. escapement mechanism for imparting letter-space movements to the carriage. printing means, locking means adapted to lock the printing means out of action, a keyboard having printing keys for controllingthe printing means and a control key for actuating said locking means to lock the printing means, a key on the carriage operatively connected to release the carriage from the escapement mechanism and actuate said locking means. and means under control of said control key in the keyboard for returning the carriage and rotating the platen for line-spacing.

23. In a typewriting machine, the combination of a power-actuated type-carrier-actuator, a platen carria e, a platen on the carriage, escapement mec anism for letter-spacing the carriage. type, a keyboard having keys for controlling the type, a carriage-release key on the carriage, means operable by said carriage release key for releasing the carriage from the. esrapement mechanism for running movement by hand, and means operable by said carriage-release key for locking said actuator and thus preventing printing movements of the type under control of thekeyboard keys when the carriage is released from the eseapement mechanism.

24. In a typewriting machine, the combination of a continuously running powershaft, a platen carriage. a platen on the carriage, letter-spacing mechanism for the carriage, printing means. power-operated means for returning the carriage. power-operated line-spacing means for rotating the platen,

for releasing a key for connecting both of said power-operated means with said continuously running shaft, and a key for connecting only the linespacing mechanlsm with the said shaft.

25. In a typewriting machine, the combination of a continuously running powershatt, a platen carriage, a platen on the carriage, letter-spacing mechanism for the carriage, printing means, power-operated means for returning the carriage, power-operated line-spacing mechanism for rotatin the platen, a key for connecting both 0% said power-operated means with said continuously running shaft, and keys for connecting each of said power-operated means with the continuously running shaft independently of the other.

26. In a typewriting machine, the combination of a platen carriage, a; platen on the carriage, escapement mechanism for letterspacing the carriage normally locking the carriage against movement in either direction,. type-carriers. key-operated carrier-selecting means, intermittently operating power-actuated meanscontrolled by said selecting means for operating seleced typecarriers and said escapement mechanism, means for releasing the carriage from the escapement mechanism for running movement in either direction by hand, and means for automatically locking said power-actuated means against operation when the carriage is released from the escapement.

27. In a typewriting machine, the combination of a platen carriage, a platen on the carriage, escapement mechanism for the carriage normally locking the carriage against movement in either direction, key-controlled power-operated printing means, power-operated means for advancing or returning the carriage with a running movement, means for releasing the carriage from the escapement mechanism for running movement, power-operated line-spacing means for rotating the platen adapted when put ino action to operate said releasing means to release the carriage, a key for putting said second power-operated means into action to return the carriage and for simultaneously putting the line-spacing means into action, and a key for putting said second poweroperated means into action to advance the carriage and for simultaneously actuating the carriage-releasingmeans independently of the line-spacing means.

28. In a typewriting machine, the combination of a platen carriage, a platen on the carriage, escapementmechanism for the carriage normally locking the carriage against movement in either direction, keycontrolled power-operated printing means, power-operated means for advancing or returning the carriage with a running movement, means for releasing the carriage from the escapement mechanism for running type-carriers,

movement, power operated line spacing means for rotating the platen adapted When put into action to operate said releasing means to release the carriage, a key for putting said second power-operated means into.

action to return the carriage and for simultaneousl putting the line-spacing means into action, a key for putting said second power-operated means into action to ad vance the carriage and for simultaneously actuating the carriage-releasing means independently of the line-spacing means, and a carriage-release key on the carriage adapted to operate said carriage-releasing means through the medium of the line-spacing means without rotating the platen.

29. In a typewriting machine, the combination of a platen carriage, a platen on the carriage, printing means, escapement mechanism for letter-spacing the carria e, power-operated means for advancing t e carriage in letterfeed direction With a continuous running movement, means for releasing the carriage from the escapement, means for locking the printing means against operation, and a carriage-advance key controlling said power-operated means and connected to move said locking means to locking position and said releasing means to releasing position when said key is actuated to put the power-operated means into action,

30. In a typewriting machine, the combination of a platen carriage, a platen on the carriage, type-carriers, key-operated carrierselecting means, intermittently operating power-actuated means controlled bythe carrier-selecting means for actuating selected letter-feed mechanism for the carriage controlled by said carrier-actuating means, power-operated line-spacing means for rotating the platen, a lock for said carr ier-actuating means movable tolocking position by the line-spacing means, means for releasing the carriage from the escapement operable by said line-spacing means, and a 1 key on the carriage connected to operate said carriage-releasing means and said lock for the carrier-actuating means through the medium of the line-spacing means without rotating the platen.

31. In a typewriting machine, the combination of a platen carriage, a platen on the carriage, type carriers, key-operated means for selecting said carriers, an intermittently operating power-driven actuator for actuating selected carriers, a lock for said actuator releasable by the carrier-selecting means, means for letter-spacing the carriage, means for imparting running movements to the carriage, and auxiliary locking means for automatically locking the actuator against operation during running movements of the carriage.

32. In a typewriting machine, the combi- Leta??? nation of a platen carriage, a rotatable platen on the carriage, a letterspacing means for the carriage, power-operate means for rotating the platen for line-spacing, power operated means for running the carriage in opposite directions, a carriagereturn key controlling the carriage running means to return the carriage and operatively connected to put the platen-rotating means into action, a carriage-advance key controlling the carriage running means to advance the carriage, said advance key being ineiiective to put the platen-rotating means into action.

33. in a typevvriting machine, the combination of a platen carriage, a rotatable platen on the carriage, a letter -spacing means for the carriage, power-operated means for rotating the platen for line-spacing, power-operated means for running the carriage "in opposite directions, a carriagereturn key controlling the carriage running means to return the carriage and operatively connected to put the platen-rotating means into action, a carriage-advance key controlling the carriage-running means to advance the carriage, said advance key being ineffective to put the platen-rotating means into action, and a line-space key connected to put the platen-rotating means into action independently of the carriage-return key and the carriage-running means.

3%. In a typevvriting machine, the combination of a platen carriage, a rotatable platen on the carriage, key-controlled power-operated line-spacing means for rotating the platen, escapement mechanism for the carriage, and a key on the carriage connected to manually impart a movement to said line-spacing means ineffective to rotate the platen, and means operable by movement of the line-spacing means by said key on the carriage for releasingthe carriage from the escapement mechanism.

35. In a typeWri-ting machine, the com binat-ion of a platen carriage, a rotatable platen on the carriage, power-operated linespacing means for rotating the platen, escapement mechanism normally locking the carriage against both advance and return movements, power-operated means for returning the carriage, a key in keyboard of the machine for putting. said carriage returning means and said line-spacing means into action, means operable by the line-spacing means for releasing the carriage from the escapement upon actuation of said key, and a key on the carriage connected to manually impart movement to saidline-spacing means for actuating the carriage-releasing means and'to render the line-spacing means inefiective on the platen during such manual movement.

36. In a typewriting machine, the combination of a platen mrriage, a rotatable platen on the carriage, line-spacing means or rotating the platen embodying a ratchet wheel connected with the platen and a pawl and operating means therefor on the carriage for rotating said wheel-and-powerdriven means for actuating said operating means, escapement mechanlsm for the carriage, carriage-releasing means operable through said power-driven actuating means and t. 1e pawl-operating means, and a car riag -release key movable with the carriage connected to actuate the pawl-operating means and hold the pawl out of engagement with the ratchet wheel.

37. In a typewriting machine, the combination of a platen carriage, a rotatable platen on the carriage, line-spacing means for rotating the platen embodying a ratchet wheel connected with the platen and a pawl and operating means therefor on the carriage for rotating said wheel and powerdriven means for actuating said operating means, escapement mechanism for'the carriage, carriage-releasing means operable through said power-driven actuating means and the pawl-operating means, and a carriage-release key on the pawl adapted to actuate the pawl-operating means to release the carriage and hold the pawl out of engagement with the ratchet wheel.

38. In a typewriting machine, the combination of a' platen carriage, a rota-table platen on the carriage, escapement mechanism for the carriage normally locking the carriage against both advance and return movements, power-driven means for advancing or returning the carriage with a continuous running movement, advance and return keys controlling the direction of running ofthe carriage by said power-driven means, means for releasing the carriage from the escapement mechanism, power-driven line-spacing means for rotating the platen connected to I actuate said carriage-releasing means and controlled by the carriage-return key, said advance key being connected to actuate the carriage-releasing means independently of the line-spacing means, and a line-space key connected to put the line-spacing means into action independently of the carriagerunning means.

39. In a typewriting machine the combination of a platen carriage, a rotatable platen on the carriage, esc-apement mechanism for the carriage normally locking the carriage against both advance and return movements, power-driven means for advancing or returning the carriage with a continuous running movement, advance and return keys controlling the direction of running of the carriage by said power-driven means, means for releasing the carriage from the escapement mechanism, power-driven line-spacing means for rotating the platen connected to actuate said carriage-releasing means and controlled by the carriage-return key, said advance key being connected to actuate the carriage-releasing means independently of the line-spacing means, a line-space key connected to put the line-spacing means into action independently of the carriage-running means, and a release key movable with the carriage connected to manually operate the line-spacing means to actuate the carriage-releasing means thereby, said release key when actuated adapted to render the line-spacing means inefl'ective to rotate the platen.

40. In a power-operated typewriting machine, the combination of a power shaft, a platen carriage, a platen, printing means, means for imparting running movements to the carriage, a frame shiftable to vary thev relation between the platen and printing means for printing different case characters, means for shifting the frame, key-opertted means for establishing a driving connectlon between said power shaft and the carriage running means, and key-operated means for establishing a driving connection between said power shaft and the frame shifting means, each of said connections emnodying clutch members adapt-ed for relative rotation while held in engagement by the k v-opt-rated means upon compl tion .L the movement of the parts driven thereby.

4:1. In a typewriting machine, the combination of a power-shaft, a platen carriage, carriage-returning means, linespacing means, case-shifting means, separate friction slip clutches forconneeting the carriage-returning means and the line-spacing means and case-shifting means with said power-shaft, and keys for operating said clutches.

42. In a typewriting machine, the combination of a frame, a platen carriage, movable transversely of'the frame, a movble tappet located substantially at the fore and aft center line of the frame for arresting the carriage, power-operated means for returning the carriage, margin and paragraph stop adjustable on the carriage transversely of theframe and adapted to engage said tappet to arrest the carriage, said tappet being normally in position to be engaged by the margin stop and normally out of position to be engaged by the paragraph stop, a key for putting said carriage-returning means into action and moving said tappet into the path of the paragraph stop, and a key for 4 putting said returning means into action without shifting said tappet from normal position. I

43. In a typewriting machine, the combination of a frame, a platen carriage movable transversely of the frame, a movable tappet located substantially at the fore and aft center line of the frame for arresting the carriage, power-operated means for returning the carriage, margin and paragraph tappet to arrest the carriage, said tappetbeing normally in position to be engaged by the margin stop and normally outjof position to be engaged by the'paragraph stop, a key for putting said carriage-returning means into action and moving said tappet into the path of the paragraph stop, a key forputting said returning means into action without shifting said tappet from normal position, a rotatable platen on the carriage, and power-operated line-spacing means for rotating the platen adapted to be put into action by either of said keys.

44. In a typewriting machine, the combination of a frame, a platen carriage movable transversely of the frame, a movable tappet located substantially at the fore and aft center line of the frame for arresting the carriage, power-operated means for returning the carriage, margin and paragraph stops adjustable on-the carriage transversely of the frame and adapted to engage said tappet to arrest the carriage, said tappet being normally in position to be engaged by the margin stop and normally out of position to be engaged by the paragraph stop, a key for putting said carriage-returning means into action and moving said tappet into the path of the paragraph stop, a key for putting said returning, means into action without shifting said tappet from normal position, a rotatable platen on the carriage, power-operated line-spacing means for rotating the platen adapted to be put into action by either of said keys, and a third key for putting said carriage-returning means into action independently of the line-spacing means,- said third key being disconnected from the tappet.

45. In a typewriting machine, the combination of a frame, a platen carriage movable transversely of the frame, margin and paragraph stops adjustable on the carriage transversely of the frame, a central tappet on. the frame having two positions for engaging difi'erent ones of said stops during return of the carriage and adapted to arrest both stops at the longitudinal center line of the machine, means for returning the carriage, and means for positioning said central stop to cooperate with the margin stop or the paragraph stop at will, said tappet being arranged to slide on a yielding verticaL thrust lug.

46. In a typewriting machine, the combination of a frame, a platen carriage on the frame, a platen on the carriage, a rack on the carriage extending transversely of the frame, a shaft on the frame, a pinion fixed on the shaft and meshing with said rack. powerdriven means for rotating said shaft in either direction, an escapement Wheel fixed on said shaft, a pair of dogs for intermittently rotating said Wheel for letter-spacing the carriage, one of said dogs normally locking said Wheel against rotation, type, keys controlling the type, means for actuating the dogs when the type-controlling keys are operated, carriage advance and return keys, means operable by said keys for puttin said power-driven means into action ant controlling the direction of rotation of the shaft, and means for releasing said locking dog from the escapement wheel upon abtuation of either the carriage-advance key or the carriage-return key.

In a typewriting machine, the combination of a main frame, a carriage frame having a front cross member carrying a scale and provided with a slot parallel with said scale, said slot and scale extending 10ngitudinally of the front cross-member, means for guiding the carriage to move transversely of the main frame, a bar having notches along one edge thereof rigidly suspended from the front cross member of the carriage parallel with said slot, a plurality of stops slidable along said bar, a stop on the main frame adapted to be engaged by said slid-able stops to arrest said stops at.

the longitudinal center of the main frame, horizontally swinging latches pivotally held to said slidable stops having noses adapted to engage in the notches in said bar, springs normally holding the latches in looking position, and finger-pieces held to said latches and extending upwardly through the slot in the cross-member. said finger-pieces being movable transversely'and longitudinally of said slot and cooperating with said scale to indicate the positions of the stops.

48. An adjustable stop device for controlling the movement of traveling carriages of typewriting machines, comprising a flat sheet metal body portion having parallel longitudinal flanges formed with inwardly facing channels to receive the opposite edges of a notched stop-supporting bar, an arm extending from one edge of the body adapted to engage a part on the machine frame, a locking lever pivotally held to the body portion to swing in a plane parallel therewith, said lever extending longitudinally of the body outside of one of said longitudinal flanges, a projection carried by said lever adjacent its free end adapted to engage in notches in a bar on which the stop is mounted, a spring normally swinging the lever inwardly to locking position, an upstanding finger-piece carried by thelever, and a pointer formed on said finger-piece adapted to cooperate with a carriage scale.

49. In a typewriting machine, a power driven carriage-returning mechanism, a line-spacing mechanism operable from the same power means, a key-controlled mechanism for putting the linempacing mechanism