US1624068A - Typewriting machine - Google Patents

Description

Aprll 12, 1927. H' L PITMAN TYPEWRITING MACHINE Filed April 18. 1923 3 Sheets-Sheet l Mf- Wy y April 12, 1927.

H. L. PITMAN TYPEWRITING MACHINE Filed April 18. 1925 3 Sheets-Sheet 2 April 12, 1927.4 H. L PITMAN TYPEwRlTING MACHINE 3 sheets-sheet s Filed April 18, 1923 Patented Apr.

UNITED, STATES PATENT oFFicE.

HENRY- L.' PITMAN, OF WESTFIELD, NEW JERSEY, ASSIGNOR T0 UNDERWOOD TYPE- WRITER COMPANY, 0F NEW YO RK, N. Y., A CORPORATION 0F DELAWARE.

TYPEWRITING MACHINE.

Application filed April 18, 1923. Serial No. 632,836.

The invention relates to typewriting machines in connection with which a motor is employed for driving the carriage. More particularly, the invention is concerned with the use of an electric motor for automatically returning the carriage, and with makeand-break connections and motor-circuit for the motor-drive The invention has also special reference to the motor and transmission-gear supports and assemblages.

Ordinarily a pi on the carriage, and-break connect niotoi` and certain ing are usually l nion, in mesh with a rack is driven through makeions from the motor. The of the transmission-gearocated behind the main frame of the-machine, and the transmission-gearing, a clutch-member clutch-member on so located, usually comprises for co-operation with a the shaft of the pinion which meshes with the rack; so that, `by rearward and forward movement of the latter clutch-member on its shaft,'the same may be made to engage and clutch-member on the rear gearing from the of this motor to disengage the transmissionto make and break the connections the carriage. A machine class, ;hoWever, commonly has' a tabulator-stop frame along which tabulatorstops are adjustab le to selected column-positions; and this frame normally liesbetween the transmission-gearing, above referred to,

and the rack on the gearing; with the continuity of the carriage, driven by such result that heretofore the tabulator-stop frame has been broken to permit movement across the ysame of the clutch-memb and movement of a tabulator-stop from oneI to the other end of the stop-frame has there- -by been rendered impossible,

feature ofv the present invention is a novel and simple construction and mounting of tlie shiftable clutch-device, such that mutilation of the tabulator-stop frame, to allow for thel shift, -is unnecessary, and such that no .tabulator movement to any position on the stop-frame.,

-stop is` prevented from Hei-etofore both the motor and the vtransmission-gearing (the latter in a casing containing a lubricant) have been mounted 0n the typewriting ,being suitably nectible from. one mission-gearing. desirable tlius'to e machine; the motor shaft aligned with, but disconof the shafts of the trans- It may not always be ncumber the machine with er above mentioned,

the motor and special attachments therefor. With the motor clear of the machine, the latter is more easily carried, different machines and motors are rendered more readily interchangeable for repairs, and less departure from the standard manual carriagereturn machine is involved than where the motor is lsecured directly to the machine. It is not always important that the automatic carriage-return be employed, and at such times the motor, if on the machine, is only an unnecessary adjunct. I

An object of the present invention is th provision of means whereby the motor may be supported independently of the machine; and the motor, the transmission gear-casing, motor circuit-connectionI box and other elements be handled as independent units, readily assembled in 'their combination 4With each other and with the elements in the machine which they control or are controlled by.

A feature of the invention is a mounting for the motor such that' adjustment of the same for effecting alignment of the motor-l shaftwith the element which it is to drive, may be readily had. In the preferred form of the invention, hereinafter described, a casing fixed to they transmission-gearing with which the'motorshaft is aligned by angular adjustment of the motor around a bolt which supports the same from a table behind the machine. This adjustability of the motor may also 4be utilized to permit the motor toV be moved back as a. unit with the gear-casing in 'disconnecting the gears therein from the carriage and in disconnecting the gear-casing from the machine frame; whereupon the gear-casing may be moved laterally with respect to the motor to disconnect the gears in the casing from the motor-shaft. The motor. is also removable alone, wheneverV desired, without disturbing the gear casing by disconnecting the motor from its support, whereupon the motor may be moved laterally with respect to the gear casing to disconnect the motor-shaft from the gears of the gear casing. For assembling, these movements'may be made in the reverse direction. The tilting of the motor about its pivotal support, Qi' theremoval of the motor or transmission gear, or both, from the machine, affords unrestricted access to the and individually replaced,

machine frame containsl other parts at the rear of escapement 'and repair, adjustment or other the machine for pur oses.

ere the motor drive is for ya machine of the so-called continuous-billing class, the base-plate which supports the carbon-carrier table, over which the web is led to the platen, may conveniently be employed as a support for the motor independent of and behind the main frame of the machine. The carboncarrier table also in such cases co-operates with the brackets upon which it is supported above the baseplate to constitute a substantial protective enclosure for the motor and transmission gear casing.

Other features and advantages will hereina-rter appear.

In the accompanying drawings,

Figure 1 is a view, in side elevation, of the machine and associated mechanisms, taken on the line 1-1 of Figure 2.

Figure 2 is a view. in rear elevation, of the machine and associatedmechanisms.

Figure 3 is a view, in side elevation, showingthe connections to the carriage-escapement mechanism and tabulator-stop frame.

Figure 4 is a view, in rear elevation, of the transmission-'gear-case, partly cross-sectional.

Figure 5 is a view, in cross-section, on the line 5-5 of Figure 4.

Figure 6 is a View, in cross-section, ou the line 6-6 of Figure 4 with certain of the parts removed.

A platen l0 is rotatably mounted in a carriage 11, which is supported on a front rail 12 and a rear rail 13 for movement in letterfeed and return directions on the main :trame of the machine. The movement of the platen-carriage in letter-feed direction is eftected by a strap 14, connected at one end`to the carriage and at the other end to the usual spring-drum 15; the movement being controlled by suitable escapement mechanism comprising a rack 16 connected to the carriage to move therewith` a pinion 17 meshing with the rack and having a one-way connection, through a pawl, not shown, with an escapenientwheel 19, and fixed and loose dogs 20 and 21, respectively, 2o-operating with the escapement-wheel and operated by a universal bar 22 in the path of the type-bars 23. The rack 16 is supported on arms 24, pivoted at 25 to the sides of the carriage. These arms are adapted to be swung up to lift the rack out of engagement with thepinion 17, and thereby to release the carriage from the control of the esca ement mechanism so that the carriage' may e thrown by the spring drum fromv one to another column or tabulating position determined by stops. 1tVhen, by reason of gravity drop, the rack 16 is in engagement with the pinion 17,'it rides upon and is supported by rneansot a roller 26, carried on a lever 27 pivoted at 28 to the escapement-frame member 29. A stop-screw 30, threaded into an ear 31 on the lever 27, by abutment with a shoulder 32 on the frame-member 29, determines the normal position of they lever and rack-supporting roller 26. When the lever 27 is swung around its pivot 28, to lift the roller 26, the rack 16 is disengaged, as above mentioned, from the pinion 17.

The lever 27 is conveniently operated, to release the rack, by means of a finger 33, which is secured to a cross-piece 34 of a tabulator-stop frame 35; so that, when the tabulator-stop frame is swung in counterclockwise direction, around a pivot 3 6, by means of a link 37, connected to the tabulatonkey lever, not shown, the finger 33, by engagement with and depression of the ltail-piece 38 of the lever 27, swings the latter in a di# rection to throw the rack up out 'of engagenient with the pinion 17.

The link 37 is pivotally connected at 39 to I a tabulator-stop frame shown as of the type found in the Underwood machine. Rigidly connected to the cross-bar 34 of this frame, at each end thereof, is an arm 40, the upper ends of which are connected by a bar 4l. The face 42 ot' thebar 41 is graduated to present a letter-space scale; and a rack 43 is formed on the under side of this bar. Pivoted on, and slidably adjustable along, a rod 44, carried by the arms 40, `are the' tabulator-stops 45. There may be any desired number of these tabulator-stops. Three such stops are shown to the right of the center-ot' Figure 2, and one to the lett of the center of Figure 2; Figure 2 being a rear view of the machine. Each tabulator-stop is in the form of a blade, the upper edge 46 ot' which is adapted to co-operate with the teeth of the. rack 43. By means of a finger-piece 47, unitaryv therewith, the stop may be rocked backward on the rod'44 to be disengaged from the rack 43; whereupon, also by means of the linger-piece 47, the stopxmay be slid along the rod 44 to its desired column or tabulating position indicated by registration of a pointer 48 on the stop with the graduations of 'the scale 42. Thereupon the stop' is swung angularly forward to cause the blade to enter between the teeth of the rack, and,

by the latter, held against longitudinalv movement on the rod 44. Suitable means,

not shown, are provided for holdingthe stop against angular dlsplacement `from the rack 43.

`With the several stops in selected position on the talmlator-frame. thelalter may be swung, by m'eans of the tabulator-ln)v and link 37, from the Figure 3 position to a position in which the stops lie in the path of a fixed stop 50 on the carriage l1. It. at this time, the carriage is released to the action of the spring-drum, the fixed stop 50, after a predetermined throw of the carriage, will piesent case, this link 53 Upon release of the tabulator-key, the tabulator-stop frame, whether by the gravity ac.

tion of the rack 16 acting through the levcr 27, or by other means not shown, will return to Figure 3 position. By subsequent operations o'f the tabulator-key, the carriage is stepped progressively to the positions determined by the tabulatorfstops.

On 'reaching the left-hand margin-stop, connections are set which cause the carriage to be-automatically returned by means of a motor 51. By means shown in patent to F. A. Hart, No. 1,238,908, dated September 4, 1917 (see particularly Figure 6 thereof), the left-hand margin-stop desired letter-scale position on a rack numbered as 52 in Figure-1 of the drawings of thepresent case, so that, when a dog or detent on the carriage reaches the left-hand margin-stop, such rack will bedepressed to actuate a link 53 connected thereto. In the is shown as pivotally` connected at 54 to the rack so' as to have a downward thrust wheat-he 'carriage reaches the margin-stop. The lower end' of the link 53 is pivotally connected at 55 to the forward end of a rocker 56, pivoted at 57 on the main frame 58 ofthe machine. The rear end of' the rocker underlies a pin 59 on a link 60. A spring 61 connected at one end tothe link 60, and at its other end latter, by engagement with the pin 59, lifts' to the main frame 58, pulls downward and rearward upon the link. The link 60, near its forward end, is, however, recessed in its under edge at 62 toengage a comb-plate 63 and normally to be held by the latter' against the action of .the spring 61. lVhen the link 53 is depressed to actuate` the rocker 56, the

the link free of the comb-plate and releases the link .to rearward movement by the spring 61. At its rear end the link connects with an arm 64 fast on a rock-shaft 65; so thatrearward movement of the link 60 will cause rearwarl swing of an arm.66 also fast to the shaft 65. The arm ,66 connects at 67 -to.

a slide 68, and a spring 69 connects an ear `70 on theslide 68 and an ear 71 on a second slide 72, to cause rearward movementfof the slide 724 upon sufficient tension of the spring 69 after. release of the link 60. The slide`- 72 operates a switch, not shown, in abonneetion-box 73, to close the circuit of the motor 51. The wires from the connection-box to.

the motor are indicatedat 74. 'Ehe box 73 is secured by screws 73* tothe. frame-.piece 58' of the machine.

motor to the carriage is,as follows. The motor-shaft 75 (see Fig'- ures 2 and 4.) is loosely set into a sleeve 7,6 integral with a shaft 77, to which a worm 78 is made Vfast by means' of a pin 79. The connection between the motor-shaft 75 and The drive from the sleeve 7 6,-and the looseness of the pin80 in may be set at any- .for the latter.

the`worm-shaft 77 is by means of a cross-pin cross cut or cuts 81 in the end of the sleeve 76. The 'looseness of the shaft 75 in the the cross-cut 81, is to assure a driving connection between the twoshafts even though the alignment of the two may not be perfect. The worm-shaft 77 i's journaled in a block 82 forming part of a gear-casing, supported, in a manner presently to be described, behind the typewriting machine. A chamber 83 in the `casing-block 82 contains the worm 78 and also a bushing or bearing-piece 84 for the worm-shaft- 77 the bearing-piece 84 be- S0 ing adjustable within the chamber 83 by means of' a set-screw 85 see Figures 4 and 5), threaded through the lock 82 and bearing against the bearing-piece. The-end 86 of the shaft 77 has' its bearing in a countersink 87 forming an extension of the chamber k83. A ball 88 receives the end thrust of the shaft 77 andserves yas a frictionless end-bearing The shaft 77 and worm 78 are prevented from longitudinal displacement in the otherl direction by abutment of the worm with the cud of the adjusted bearing-block The 'worm 78 meshes with a gear 89, keyed at 90 to a hub 91, journaled for rotation in the casing-block 82. The Casin"- block is countersunk at 92 to receive bus ings 93 and 94, the inner peripheries of which are oppositely tapered to form -one part of a runway for ballfbarings 95; the 100 other part of the runway being provided by an exterior `peripheral groove 96 in the hub tained, and, for'this purpose,is. closed b a Y plate 102. The plate 102 is setl on shoul ers 115 i.

103 .on the block 82, and is secured to the .latter byscrews 104. f A finger-piece 105,

secured vto the plate-102, serves as a means for positioning and ,removing the same.

' The shaft 101 of its axis to make and 'break the'dr'ive from the motor tothe oarriageby bringing together or'disconnecting the clutch- members 99 and 98. The forward endof the shaft I (see Figures 1 and 2) 'has bearing ina 125 bracket 106, offset from and secured by" screws 107 to'another bracket 108, which latter is, in turn, secured'by screws 109'to one of the rear posts of-'th'e typewriting machine. The bracket 108 also-serves asa supl30 is movable longitudinally 120 l purpose, a pair of bolts or posts 110 are provided. rlhese posts have reduced ends 111 to provide shoulders for setting the posts against the rear face of the bracket 108; and these reduced ends arethreaded' into the bracket 108. As shown in Figure 6, the rear ends of the posts 110 are shouldered at 112 to be set against the rear face of the casingblock 82 and to provide reduced portions 113 set into countersinks 114 in the block 82. Headed screws 115 and 116` are passed through holes 117 and 118, respectively, in the gear casing or block 82 in the rear of the latter and thread into the' ends of the posts 110. The holes 117 and 118 .are enlarged in the form. of countersinks to receive the screw heads and to provide shoulders 119 against which the heads may bear, so that, when the screws are tightened, the ends of the posts 110 will be drawn and held against their seats in the casing block 82.

`When the clutch- members 99 and 98 are brought together by a rearward movement of the shaft 101, the drive from the shaft 101 to the carriage is effected through a rear 120 which is fast to the shaft 101 and which meshes with a rack 121. The vrack 121 is supported on guides 122 carried by brackets 123 on the carriage 11. The guides 122 are received in slotsv 124 formed in the rack, the slots being of sufficient length to permit limited movement of the rack relatively to the carriage. Headed screws 125,- engaging the rear face of the rack and attached to the guides 122, retain the rack in position4 on the guides. When movement of the rackby the motor is initiated, vthe rack moves relatively to the carriage until the guides 122 engage the ends of the slots 124 in the rack, after which `the rack and carriage move in unison. During the period when the rack moving relatively to the carriage, the platen is automatically line-spaced. The manual line-spacing mechanism may be that common to the Underwood standard ty ewriter, and comprises a slide 126, operable by a line-space lever, .not shown, and carrying apawl, not shown, for turning the ratchet-wheel on the platen-shaft. To effect automatic 'line-spacing of the platen through the initial movement of the rack 121 relative to the carriage, connections are provided from the rack 121 tothe slide 126.

Theserconnections comprise a pin 127 depending from the slide 126 and loosely fitted in a fork in the end of an arm4128 fast to a vertical rock-shaft 129 suitably journaled in brackets 123 `and 130 on the carriage. Fast to the lower end of `the shaft 129 is. an arm 131 loosely set inaniche 132 in the lower edge of .the rack 121. When, therefore, the rack receives its initial movement above mentioned, it rocksthe arm 131, shaft 129 and arm 128 tothrow the pawl-carryingline-space slide 126. At the time the guides 122l have reached the end ofthe slots 124, line-spacing has been effected, and thereafter on further movement of the rack 121 by the gear 120 return movement of the carriage is effected. a

rllhe clutch- members 98 and 99 are normally separated, as shown in Figure ,5, but are brought together by the same movement of the link 60 which closes the motor-circuit. For this purpose, theishaft has a third arm 133 fast thereto, connecting with a link 134, in turn connected to an arm 135 fast to a rock-shaft 136 journaled in the bracket 106. Also fast to the shaft 136 is an arm 137 terminating in a ball 138 which is set between flanges 139 and 140 on asleeve 141 fast vto the gear-shaft 101. When, therefore, the link 60 is thrown rearward by the spring 61 to rockthe shaft 65, the link 134 is drawn forward and the arm 137 swung rearward with the shaft 101 to throw the clutch-member 99 to the clutch-member 98. This operation may take place before the spring connection between the slides 68 and 72 has operated to close the motor-circuit. When the carriage reaches the right-hand margin stop, certain connections are operated to throw the shaft 101 forward to disconnect clutch-member 99 from clutchmember 98. These connections may consist, in part, of certain mechanism, shown in Figure 4 of the aforesaid patent to Hart, whereby a shaft therein numbered as 42 and numbered in Figure 1 of the present application as 142 is partially rotated to swing forwa an arm 143 fast thereto. The arm 143 connects with the forward end of a link- 144, the rear end of which connects with another link or slide 145 guided by means of a pin-andj slot connection 146 on the main frame. The

link 145 connects with a third arm` 147 on the shaft 136; so that, when the right-hand margin stop acts to draw forward the links 144 and 145, the shaft 136 will be turned to cause the arm 137 thereon to draw forward the shaft 101 a distance-sucient to separate the clutch- members 99 and 98.

llt will be noted that the gearv120, which drives the rack 121 for automatic return of the carriage, is of a width sufcient to'permit it to remain in mesh with the rack 121 vwhatever the shifted position of the shaft 101. It will also be noted (see Figure 1) that the required rearward movement of the shaft 101, in connecting the-clutch-niembers, is insufficient to cause the gear to strike or to be obstructed by the' cross-piece34 of the tabulator-stop frame. The lower ed e of the cross-piece 34 ma however, f-

slightly cut` away, as is 'indicated at 148 in 1 Figure 1, to accommodategthe shaft 101 by reason of the fact that' the contiguous planeaU of the shaft 101 and cross-piece 34 intersect j and overlap each other. The cut 148 rel through openings in the duces the cross-sectional area of the crosspece 34, but does not, however, interfere with the continuity of the cross-piece 34 and rod 44 of the tabulator-stop frame;and,

f since no break in that cont-inuity is required C to the carriage of the typewriter to move therewith in letter feed and return directions, and a bracket 151 is provided at each side of the machine to support a rear rail, not shown, on which the rear of the table 149 may rest and ride with the typewriter carriage above the motor 51 and gear casing block 82. 1n addition, to its other purposes the table 149 (zo-operates with the brackets 151 in substantially enclosing the motor and gear casing 'at the rear of the inachine to prevent interference with the work. In Figure 1, one of the brackets 151 is shown as carried by a base-plate or table 152, which is extended forward as a support also for the typewriting machine. The table 152 may be a rectangular channel bar skeleton having side channel bars 153, front and rear channel bar cross-pieces, not shown, and an intermediate channel cross-bar piece 154. Feet 155 of the typewriter may pass channel-bar structure. The in ermediate channel bar crosspiece 154 may be turned rearward, intermediate the sides of the table 152 to forma U, the rearward cross reach of which U is indicated in cross-section at 156 in Figure 1. This rear reach 156 is employed as a support for the motor, so that the machine it- Self may be relieved of the weight of the motor and of all devices for connecting the motor thereto, and so that the motor and machine may be handled independently of each other. F or supporting the motor on the cross-piece156, posts 157 are provided.

These posts have reduced lower ends 158, which are threaded through the cross-piece 156, and have reduced upper ends 159. which provide shoulders 160 to support a bracket 161, and onto which nuts 162 are threaded to holdthe bracket 161 on its seat. Suitable spacing means are also preferably provided for adjusting the height of the motorshaft 75 relatively to the worm-gear transmission-sleeve 76. For this purpose one or more shims or washers 175 may be interposed between the lower ends of the posts 157 and the upper surface of the cross-piece 156 the reduced diameter threaded portions l 158 passing 'through the washers 175 and J oeing screwed down onto the cross-piece 156. The bracket 161 has integral therewith a block 163 through which a bolt 164 is passed.

The motor-casing has a pair of depending ears 65, one at each side thereof, and which overlie the ends of the block 163. The ears 165 are perforated to permit assage therethrough of the bolt 164, and t e end of the bolt is threaded to receive nuts 166 which areadapted to be turned in against the ears 165. motor-casing may be swung radially about the axis of the the bolt 164. Upon tightening the nuts 166, the motor will be held 1 position.4 y

The angular adjustment of the motor on the bolt or axis 164 provides for movement forward and rearward of the motorshaft 75 for alignment of the same with the worm-shaft 77. This angular movement of the motor is also for the purpose of assembling and disasselnbling the parts. To remove the gear-casing 82, for instance, the screws 115 and 116, which hold the motor against angular displacement,maybe loosened and the motor together with the gear-case swung bark until the shaft 101 is clear of the gear-case. Thereupon the gear-case may be drawn .sidewise to clear the worm-shaft 77 of the motor-drive shaft` 75. The gear-case is then freeof the machine, and the motor may then be removed by lwithdrawing the boltV 164. The motor 51 may be removed without disturbing the transmission gear casing 82 by removing the bolt 164 and moving the motor away from the gear casing 82 to disconnect the motor-drive shaft 75 from the worn1-shaft 77. For assembling the parts, these operations are performed in reverse order. The removal of the motor 51 or gear casing 82, or both, from the machine, or tilting of the motor 51 upon its pivotal support, as above described, permits ready access to be had to the escapement and other parts at the rear of the machine for'purposes of adjustment, repair or otherwise. The

.connection-box 73 is shown as provided with terminal clips 167 for receiving the socket or connection-piece of the line (not shown) through which the power for driving the motor is supplied. p

For effecting automatic return of the carriage at any time, a key 168 is provided. This key is mounted upon one arm 169 of a bell-crank lever, the other arm 170 of which terminates in a nose under a block 171, pivoted at 172, on the shift-link 60. A pin 173 prevents clockwise (Figure 1) movement of the block 171 on its pivot: sol that, when the arm 170 swin s forward against the bfock, the link is lited and freed from the comb-plate to the action of the spring 61. A coil-spring 174 returnsthe bell-crank and key 168 to normal position. In such return When the nuts 166 are loosened, the

upright in its FigureI pivotal support provided by soI lllfi vmachine having a platen-carriage, letter-iced and return directions,

movement, the arm 170 rocks the block 171 counterclockwise on its pivot 172, and is thus enabled itself to return to normal'position.

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

Having thus described my invention, I claim:

1. The combination with a typewriting movable in of carriage feeding mechanism including escapement devices, a motor, a support for the machine, an extension of said support behind the machine, a bracket above said supporting extension, said motor being supportedV on said bracketdirectly at the rear of the escapement devices, driving connections from the motor to the carriage including a shaft, and a horizontal pivotal connection between said motor and said bracket for rendering the motor displaceable downwardly, to give free access to the escapement devices, said motor being disconnectible 'from said driving shaft.

2. The combination Awith a typewriting machine, having a platen-carriage, movable in letter-feed and return directions, of a motor, a support for the machine, `an extension of the support behind the machine.v

osts on the extension, a bracket on the posts or supporting the motor, and driving connections from the motor to the carriage.

3. The combination with a typewriting machine, having la platen-carriage, movable in letter-feed and return directions, of a motor, a common support for the typewriting machine and the motor, means for demountably securing the-motor on its support`V independently of the machine, comprising a brac et on'the support, bosses on the motor, and a removable bolt passing through the bracket and the bosses, and driving connections from the motor tothe carriage.

4. The combination with a typewriting machine, having a platencarriage, in letter-feed and return directions, ,of a motor, a common support for the typewriting machine andthe motor, means for demountably securing the motor on its support, inde endently of the machine, comprising a brac 'et on the support, bosses on the motor, a removable bolt passing through the bracket and the bosses, and a nut on the bolt adapted to be tightened and loosened with respect to the adjacent boss, to provide forI angular adjustment of the motor around the axis of the bolt, and drivingconnections from the motor to the carriage.

5. The combination with a typewriting machine, having a platen-carriage, movable in letter-feed and return directions, a rack ou the carriage, and a pinion meshing with the rack, of ai motor having a drive-shaft, a transmission-shaft connected to the pinion, and pivotal means for displacing the motor vthe shaft which carries movable in letter-feed and return directions,

driving shaft and of the in the direction of the angularly re-adjusting the position motor to effect a vre-alignment of the motordrive-shaft and transmission-shaft.

6. The combination with a typewriting machine, having a in letter-feed and return directions, a rack on the carriage, and a pinion meshing with the rack, of a motor having a drive-shaft, a transmission-shaft connected to the pinion and to the drive-shaft, and pivotal means for radially adjusting the position of 'the motor in the direction of the transmission shaft to effect displacement or alignment of the motor to the transmission-shaft.

platen-carriage, movable 7. 'The combination` with a ytypewriting machine, having a platen-carriage, movable in letter-feed and return on the carriage, and a pinion meshing with the rack, of a motor having a driveshaft, a transmission-shaft connected to the pinion and releasably connected to the drive-shaft, andpivotal means'for displacing the motor to give access to certain other parts of the machine and then effect the re-alignment of the motor-drive-shaft and transmissionshaft. i

8. Thercombination with a. typewriting machine, having a platen-carriage, movable in letter-feed and return directions, a rack on the carriage, a pinion meshingl with the rack, a drlve-shaft for the pinion, and a clutch-member on the drive-shaft, of a transmission-gearing, a clutch-member on the transmission-gearing, and means for shifting the pinion and one of the clutch-members into position to cause the clutch-members to engage one another.

9. The combination with a typewriting machine, having a platen-carriage, mova ble in letter-feed and return directions, a rack on the carriage, a pinion meshing with the rack, a drive-shaft for the pinion, and a clutch-member on the drive-shaft, of a transmission-gearing, a clutch-member on the transmission-gearing, and means for shifting the shaft which carries the pinion and one of the clutch-members into position to cause the clutch-members to engage one another without disengaging the pinion from the-rack.

10. The combination with a typewriting machine, having a platen-carriage, movable a rack on the carriage, a pinion meshing with thc rack, and a drive-shaft for the pinion, projecting rearward from the machine, and having a clutch-member thereon behind the machine, of a transmission-gearing comprising a clutch-member behind the machine. and means for shifting the shaft rearward and backward to make and break the driving connections bycausing the clutch-members to engage and disengage each other.

11. The combination with la typewriting directions, a rack machine, having a platen-carriage, movable in letter-feed andreturn directions, a rack on the carriage, a pinion meshing with the rack, and a drive-shaft for the pinion projecting rearward from the machine, and having a clutch-member thereon behind the machine, of a transmission-gearing comprising a clutch-member behind the machine, means for shifting the shaft rearward and backward to-make and break the driving connections by causing the clutch-members to engage and disengage each other, a moltor for driving the transmission-gearing. and key-controlled means for concomitantly closing the motor-circuit and effecting the engagement of the clutch-members with each other.

l2. The combination with a typewriting machine, having a platen-carriage, movable in letter-feed and return directions, a rack on the carriage, a pinion meshing with the rack, and a drive-shaft for' the pinion projecting rearward from the machine,` and having` a clutch-member machine, of a'transmission-gearing comprising a clutch-member behind the machine, means for shifting the shaft rearward and backward to make and break the 'driving connections, by causing the clutch-members toengage and disengage each other, a motor for driving the transmission-gearing, and means automatically controlled by a margin-stop, on movement of the carriage, for concomitantly closing the motor-circuit and effecting the engagement of the clutchmembers with each other, for return movement of the carriage.

13. The combination with a typewriting machine, having a platen-carriage, movable in letter-feed and return directions, a rack on the carriage, a pinion meshing with the rack, anda drive-shaft for the pinion pro- Ijecting rearward from the machine, and Ahaving a clutch-member thereon behindthe machine, of a transmission-gearing comprising a clutch-member behind thelnachine, a motor for driving the transmissiongearing, means for concomitantlyclosing the motor-circuit and thrustingthevpinionshaft with the clutch-member thereon rearward,` to bring the clutch-members into engagement with each other, and means automatically controlled by a margin-stop for concomitantly breaking the motor-circuit and drawing forward the pinion-shaft with the clutch-member thereon for disngaging the clutch-members.

14. The combination with a typewriting machmc, having a platen-carriage, movable in letter-feed and return directions, of atransn'nssion-gear casing containing gearing for driving the carriage, said gearing comprising a pinion, a worm-gear set in a chamber in the casing, in mesh with the pinion, a shaft for the worm, and a hub to which thereon l'iehind the the pinion is keyed; the hub being journaled for rotation in one wall of the casing.

l5. The combination wit-h a typewriting machine, having a platen-carriage, movable in letter-feed and return directions, ofa transmission-gear casing containing gearing for driving the carriage, said gearmg comprising a pinion, a worm-gear ber in the casing, in mesh with the pinion, a shaft for the worm,l and a hub to which `thel pinion is keyed; the hub. being jourtor on its sup ort, to align theshaft thereof set in a chamwith the sha t of one of the gears in the gear-casing; the motor being demountably Vsecured to its support, and the gear-casing being demountably secured to the machine.

17. The combination in a typewriting machine, having a platen-carriage, movable in letter-feedand return directions, a rack on the carriage, a pinion meshing. with the rack, a shaft for the pinion, projecting rearward and having at its rear one member ot a clutch, a bracket in which the shaft is journaled, and means for shifting the shaft, with the clutch-member thereon, rearward,` comprising a rock-shaft, also journaled in said bracket, and having an arm thereon for engagement with the first-mentioned shaft. j

18. The colnbination with, a typewriting machine, having a platen-carriage, movable in letter-feed and return directions, a rack on .the carriage, a pinion meshing with the rack, and a shaft to which thevpinion is made fast, and which projects rearward of the machine, one member of a clutch fast to the shaft near the rear thereof, of a gearcasing demountably secured at the rear of the machine, and containing. gearing comprising a hub in which the end of rthe shaft is journaled, a clutch-member on the hub for engagement with theclutch-member on the shaft, a pinion on the' hub, a worm 'meshing with the pinion on the hub, a shaft for the' worm, and amo-tor having a shaft s et in a hollow in the vworm-shaft, substantially at right angles" to the-frs't-mentioned shaft; the gear-casing being demountably secured to the typewrlting machine, and the motor being adjustable rearward onits support, whereby, with the motor-shaft and wormshaft in engagement,the motor and the gear- *1.30 i

casin may be shifted rearward to disengage the rst-mentioned shaft from the gearcasing, and whereby the gear-casing and the worm-shaft may then be moved laterally to disengage the worin-shaft from the motorshaft.

19. The combination with a typewritingmachine, having a platen-carriage, movable in letter-feed and return directions, a rack on the carriage, a pinion meshing with the rack, and a shaft to which th'epinion is made fast, and which projects rearward of the machine, one member of a clutch fast to the vshaft near the rear thereof, of a gear-casing demountably secured at the rear ofthe machine, and containing gearing comprising a hub in which the endv of the shaft is journaled, a clutch-member on the hub for engagement with the clutch-member on the shaft, a pinion on the hub, a worm meshing Vwith the pinion on the hub, a shaft for thel worm, and a motor having a shaft set in a hollow in the worm-shaft, substantially at right angles to the first-mentioned shaft; the gear-casing being demounl'ably secured to the typewriting machine, and the motor being plvotally mounted on its support, in-y dependently of the machine, for a rearward and forward swing, whereby, with the motor-shaft and worm-shaft in engagement, the motor and the gear-casing may be shifted rearward to disengageA the first-mentioned shaft from the gear-casing, and whereby the gear-casing and the Worm-shaft may then 'be moved laterally to disengage the wormshaft from the motor-shaft.

20. The combination in a typewriting machine, having aplaten-carriage, movable 1n letter-feed and returndirections, a tabulator-stop frame extending the machine, at the rear thereof, tabulatorstops adjustable to selected 'column-positions' along the tabulator-frame, and means for returning the carriage, comprising a rack on the carriage, I frame, a pinion meshing with the rack, a Shaft to which the pinion is' made fast, and

4which projects rearward, uhder the tabulator-stop frame, a clutch-member -on the shaft, to the rear of the tabulator-sto frame, and means for shifting the shaft wit the clutch-member rearward and forward,

Vwithout bringing either the pinion or the clutch-member into Ithe plane of the tabulaxtor-stop frame, thereby permitting the column-stops to be shifted along the tabnlatorstop frame from one to the other side of the rearwardly-projectingr shaft.

21. The combination with a typewriting vmachine having a platen-carriage movable in letter-feed and return directions. of a motor having a drive shaft, a pivotal support for said motor, and transmission gearing mounted adjacent said motor, said transmission gearing including a shaft rei sion gearing from longitudinally of.

'forward of the tabulator-stop' tudinal axis of said motork movably connectible to said motor drive shaft and operatively associable with said carriage, said motor and transmission gearing being tiltable as a unitl about said pivotal support toward the plane of the base of the machine to disconnect said transmissaid carriage.

22. The combination 'with a typewriting achine having a, platen-carriage movable in letter-feed and return directions, of a motor having a drive shaft, a pivotal support for said motor, and transmission gear-- ing mounted adjacent said motor, said transmission gearing including a shaft removably connectible to said motor drive shaft and operatively associable with said carriage, said motor and transmission gearing being tiltable as a unit about said pivotal sup ort toward the planey of the base of the mac ine to disconnect said transmission gearing from said carriage, and said transmission gearing and motor being se arable from each other by relative with rawal in the directionl of the longitudinal axis of said motor shaft.

, 23. The combination with a typewriting -machine having a platen-carriage movable iu letter-feed and return directions, of a,

motor having a drive shaft, a common support for said machine and said motor, a pivotal support for said motor above said common support, transmission gearing including a shaft removably connectible.to said motor d riveishaft, and a-second shaft for driving said carriage, said carriage-driving shaft being operatively associable with said asv vll() ing a shaft removably connectible to' said motor drive shaft, and a second shaft for driving said carriage, said carriage-drivin shaft being operatively associable with sai transmission shaft and having a portion extending within the frame of the machine,

4said motor and'transmission gearing being tiltable as-a unit about the pivotal support toward said common support to disconnect said' transmission gearing from said carriage-driving shaft, and said transmission gearing being removable from said motor bywithdrawal in the direction of the longidriveshaft. 2,5. The combination with a typewriting CIV machine having a platen-carriage movable 1n letter-feed and return directions, of a motor having a drive shaft, a pivotal support for said motor at the rear of the machine, the longitudinal axes of said carriage and said motor drive shaft being substantially parallelito each other, transmission gearing mountable on said machine and including a. shaft removably connectible to said motor drive shaft, and a carria edriving shaft operatively associable with said transmission shaft, said carriage-driving shaft having its major portion extending within the machine frame in a direction substantially at right angles to said motor drive shaft and said carriage, said motor and transmission gearing being tiltable as a unit about the pivotal motor support to connect and disconnect said transmission gearing and said carriage-driving shaft.

26. The combination with a typewriting machine having a platen-carriage movable in letter-feed and return directions, of a motor having a drive shaft, a pivotal support for said motor at the rear of the machine, the longitudinal axes ofsaid carrage and said motor drive shaft being substantially parallel to each other, transmission gearing mountable on said machine and including a shaft removably con-nectible to said motor drive shaft, and a carriage-driving shaft operatively associable with said transmission shaft, said carriage-driving shaft havingV its major portion extending within the machine frame in a direction substantially aty right angles to said motor drive shaft and said carriage, said motor and transmission gearing being tiltable as a unit abouty the pivotal Ymotor support to connect and disconnect said transmission gearing and said carriage-driving shaft, and said transmission gearing being conncctible to and disconnectible from said motor by relative movement in the direction o the longitudinal axis of said motor drive s aft. I

2T. The combination with a typewriting machine having a platen-carriage movable in letter-feed and return directions, of'a motor having a drive shaft, a pivotal support for said motor at the rear of the machine, the

longitudinal axes of said carriage and said motor drive .shaft being substantially parallel to cach other, transmission gearing mountable on said machine and including a shaft removably connectible to said motor drive shaft, and a carriage-driving shaft operatively associable with said transmission shaft, said carriage-driving shaft having its 00 major portion extending within the machine frame in a direction substantially at right angles to said motor drive shaft and said carriage,'f+1aid motor and transmission gearing being tiltable as a unit about the pivotal motor support to connect and disconnect said transn'iission gearing/and said carriage-driving shaft, and ysaid motor being tiltable on its pivotal support independently7 of said transmission gearing to permit alignment of said motor shaft and said transmission shaft. Q8. The combination with a typewriting machine having a platen-carriage movable in letter-feed and return directions, of transmission gearing for driving said carriage, said transmission gearing including a clutchmember, and an intermediate shaft operatively connected to said carriage and having a clutch-member, said shaft being shiftable to alternately connect and disconnect said clutch-members to make andbreak the driving connection Without breaking the operative connection between said shaft and said carriage. p

29. The combination With a typewriting machine having a platen-carriage movable in letter=feedy and return directions, of transmission gearingrincluding a casing block, a gear in said block, said gear having a hub which is operatively connectible to said platen-carriage, and a bearing-for said hub, said bearing including a pair of separable bushings housed as a unit within said block and having oppositely inc-lined inner edges 4 jointly forming a ball-race, anda pluralitys of ball-bearings in said race forcentering said hub relatively to the block. t y 30. The 4combination with a typewriting machine having a platen-carriage movable in letter-'feed and return directions, of trans- 100 mission gearing including a `casing b1ock, a gear in said block, said gear having a hubv which is operatively c'onnectible to said platen-carriage, aV bearing for said hub, said bearing including a pair of separable sub- 105 stantially disk-shaped bushings housed as a unit within said block and disposed to center said hub relatively to the block, said hub having a peripheral groovev and'said bushings having oppositely inclined inner edges 110 (zo-operative with said peripheral groove to provided a ball-race, a plurality of ball-bearings in said ball-race, and means for assembling the ball-bearings and then securing said bushings within the housing of said casing block.

HENRY L.'P1TMAN.

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