US1886845A

US1886845A - Typewriting machine

Info

Publication number: US1886845A
Application number: US405307A
Authority: US
Inventors: Burnham C Stickney
Original assignee: Underwood Elliott Fisher Co
Current assignee: Underwood Elliott Fisher Co
Priority date: 1929-11-07
Filing date: 1929-11-07
Publication date: 1932-11-08
Anticipated expiration: 1949-11-08

Description

maa as Nov. 8, 1932.

' B. c. STICKNEY TYPEWRITING MACHINE 3 SheetsSheet 1 Filed Nov. 7, 1929 Nov. 8, 1932. B. c. STICKNEY TYPEWRITING MACHINE Filed Nov. 7, 1929 3 Sheets-Sheet 2 r w m V m 3 B. c. STICKNEY 1,886,845

TYPEWRITING MACHINE Filed Nov, 7, 1929 5 sheets-sheet 3 drives the platen,

' Patented Nov. 8, 1932 UNITED PATENT orricsi .BURNHAM o. sT'IoKnEY, 0F HILLSIDE, NEW JERSEY; ASSIGNOR. T0 UEDEEWOOD ELLIOTT FISHER cor/mama, on NEW YORK, it. an ooaronacrron' or DELAWARE rYPEwE-rrrivq MACHINE Application filed November 7, .Seriai Ito. 405,307.

This invention relates to line-spacing mechanism of typewriting machines of the class in which minute variations of the line-space movement can be produced, and inwhich a line-space regulator can also be adjusted for spacin the required number of linespace units at each stroke of the lever which returns the typewriter-carriage.

One of the main features of the invention is to effect the desired movements of the lever to the revoluble platen.

The line-space mechanism is shown mounted upon a carriage which shlfts up and down, as in the well-known Underwood nolsel'ess typewrlting machine. 7

Upon the platen-axle 1s fixed a bevel gear and meshing therewith 1s a small bevel pinion that is fixed upon a vertical mam arbor, the

latter having a thumb-wheel at its top;

Meshing with the pinion is a large gear that Also fixed upon the main arbor is a ratchet-wheel having a great multitude of very fine teeth. To secure a suiticient number of teeth, the ratchet-wheel may have great diameter, say 25 per cent. greater than the diameter of the platen; the proportions and connections being such that the pe ripheral travel of said ratchet-wheel is several times that of the platen.- 1

concentrically with the ratchet-Wheel is mounted a pivoted driving arm, which carries A fea ture of the invention resides in pivoting the p a pawl to drive said ratchet-wheel.

line-space lever directly upon said arm. This or an equivalent connection avoids the L necessity of employing several gears, and

lightens the task of operating the line-space handle or lever, which extends forwardly from said arm.

. Said pivoted line-space lever is moreover slidably fulcrumed between its ends upon a stationary pin or stud, which may be mounted in front of said vertical arbor.- Said pawl bearing arm is a lever of the third class, having pivoted thereto between its ends'the rear end of said line-space lever. This pivotal point may be. in the rear of said vertical arbor;

and it is'practicable to swing said arm, together with said 'ratch'et wheel, through about 120' degrees at a full stroke tithe linespace lever. 4 v i The ratchetnvheel being of great diameter, and its teeth having minute pitch, it"result's that a multitude of the fine teeth are included Within a stroke of 120 degrees of the ratchet wheel, which is an advantage in that it makes it feasible to secure a practically universal variation in the measu'r'ement'of the line space unit. This adjustment of the: unit is effected by setting the aforesaid lines'paoe lever fulcrum forward or backward; the linespace lever being longitudinally slotted to accommodate the adjustment of its fulcrum.

When its fulcrum is at the forward position,

the line space lever effects a maximum stroke of the'platen; WVhen the fulcrum is at the rear position, a minimum stroke is imparted to the platen; The fulcrum-pin may be set to any intermediate position, and thus secure proportionate variation in the rotation of the platen for a given extent of'stroke of the linespac'e lever. i

An advantage is that said fulcrum pin is stationary, being rigidly mounted upon the typevvriter-carriage, and being readily adjusted upon said carriage, and aflording reliability, cheapness and simplicity over prior methods of effecting universal variations inthe measurement of the line-space unit;

The driving stroke of the lever is arrested by the engagement of the pawl with a fixed stop, which co-operates with the pawl to lock the ratchet-wheel and platen against overthrow.

In its return movement, the line space lever is arrested by a novel regulator-train, which may be set for one-half, one, one and onefourth, one and one-half, two, two and one half or three line-space units; The length of each line-space unit is determined the setting of said fulcrum of the line sp'a'ce lever.

Said regulator possesses features of novel'- ty, being itself in the form of a lever-train,

which may be somewhat similar to and seiner dent with the line spa'ce lever-train; The

regulator-lever and the line-space lever have 166 platen, and also leaving the ratchet-wheel free to be revolved idly with the platen when the latter is occasionally rotated, either by means of said vertical arbor and its thumb wheel, or by means of the finger wheels fixed upon projecting ends of the platen-axle.

Said regulator-lever has a movable locating tooth, to engage properly-spaced notches which form a row upon the edge of a table or plate which is mounted upon the carriage. The regulator-lever also has a lug which limits the return stroke of the line-space lever. The two levers can. if desired be swung together in either direction about their fixed fulcrum, when it is desired to alter the setting of theline-space regulator-lever. This swinging movement of both levers has no tendency to rotate the ratchet-wheel and platen, since the pawl or ratchet remains disengaged at this time, from theratchet-wheel.

Owing mainly to the coincidence of the line-space regulator-lever with the line-space lever, and to the coincidence of the pivoted interceptor-arm with the pawl-carrying drive arm, like movements of the line-spacelever train and the regulator-lever train produce corresponding effects. Therefore, by swinging the regulator-lever to'any desired point, and setting it there, the length of the stroke of the line-space lever may readily be predetermined, The regulator-lever is longi tudinally slotted like the line-space lever; and when the fulcrum is adjusted along one slot itis adjusted to just the same extent along the other slot, so that subsequent adjustment 0f theregulator-lever to location fora given number of line-spaces, controls the subsequent motion of the line-space lever for driving the platen tothe extent desired.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a sectional plan of a linespacing mechanism, showing the present improvements applied to the Underwood noiseless typwriting machine; the parts being in normal positions, and adjusted for three line-spaces, the line-space unit of measurement being adjusted at the maximum.

Figure 1 is a plan of the table and th regulator pin.

lever.

- Figure 7 is a sectional end elevation of the noiseless typewriter-carriage andthe linespacing mechanism, showing the adjustment for approximate maximum line-space-unit measurement. 7

I Figure 8 is a sectional front elevation of the'same.

' Figure 9 is a sectional elevation of the carriage, showing the framing of the linespacing mechanism, and also the forward end of the line-space regulating train.

Figure 10 is a sectional front elevation, showing the mounting of the fixed stud which is adjustable for universallyvarying the-line-space-unit measurement. 7

A carriage-returning and line-spacing handle 10 projects forwardly from a table 11, forming part of a bracket, which is secured upon the left-hand end plate 12 of the carriage 18 of an Underwood noiseless typewriting machine; a platen 14 being j ournaled in said carriage by means of an axle 15 having at each end a hand-wheel 16.

Said handle may be in the form of a lever of the first order, which turns about a vertical stationary fulcrum-pin 17. At its rear end said lever 10 is articulated at 18 to a lever 19 that carries at its outer end a pawl 20. At its end the pawl-lever 19 is pivoted concentrically with a vertical rotary main shaft 21. Fixed upon said main .shaft is a wheel 22 of great diameter, having ratchet-teeth 23. c It will be seen that as the carriage-returning lever lOis driven from left to right at Figure 1, its rear end swings about the fulcrum 17 from right to left, carrying lever 19 in the same direction, together with the pawl 20, which at this time ,is meshing with the ratchet-teeth 23. Thus the wheel is revolved, together with a bevel pinion 24 that is also fixed upon. said vertical main shaft 21; said pinion meshing with a large bevel gear 25, which is fixed upon the platen-axle 15, thereby line-spacing the platen 14.

The pawl-lever 19 is a lever of the third order, and is employed for the purpose of multiplying the movement of the pawl 20, as compared with the movement. of the driving pivot 18. The parts are so arranged that this movement-multiplying lever 19 can swing, together with the ratchet-wheel 22,

through an arc of about 120 degrees, at a maximum stroke of the line-space lever 10.

Since the ratchet-wheel 22 may be made of Figure 2 is a plan of a line-space adjusting.

great diameter, as compared with the platen,

say 50 to the inch, if desired, or even a finer pitch, substantially accurate spacing of the platen is reliably secured, since a variation si nificant variation in the line-s aacin of o p a:

the work-sheet.

This result is secured without the need of i; x using movement multiplying gearing, as

heretofore, between the line space-handle and the driving pinion-axle or arbor 21. Thus there may be secured simplicity of structure and operatioinand cheapening and lightness of parts, and compactness of the entire linespace mechanism. The means for preventing overthrow of the ratchet-wheel 22 and the platen, and also the means for automatically releasing the pawl from the ratchetwheel after every stroke, will presently be de scribed.

In order to secure universal variation in the measurement of the line-space unit, the fulcrum-pin 17 is made adjustable to diii'er-ent positions lengthwise ofthe line-space lever 10, to shorten either arm thereof while lengthening the other arm. The lever is provided with a longitudinal slot 26, to accommodate such adjustment of the fulcrum-pin 17, and a maximum variation of 100 per cent or more, in the measurement of the line-space unit, may be secured by adj ustin the fulcrunrpin 17 from its extreme rearward position to its extreme forward position.

The fulcrum-pin 17 may be set either at its extreme forward position, to give a maximum measurement of line-space unit, or at its extreme rear position to give a minimum measurement, or at any position intermediate said limits; and it is always rigidly retained by the friction-tongue 36.

The direction of adjustment of the fulcrum-pin 17 is along the line-space lever slot 26 when the latter is seen at the extreme righthand end of its working stroke. The lever at this time is arrested by means of a stop 27, which is in the path of the spacing pawl 20, see Figure l; the head of the pawl being beveled at 28, and the stop 27 being given a corresponding inclination, for the purpose of locking the pawl into the teeth of the ratchetwheel, so that the latter cannot be overthrown by reason of the momentum of the platen geared thereto.

There is therefore an invariable stopping position for the drive stroke of the line-space lever, i. e., its position when the locking of the pawl prevents the overthrow of the platen.

The fulcruinpin 17 is supported for adj ustment by means of a slide 29, which underlies the top 30 of the table 11, and is provided with a finger-piece 31 that extends up through a slot 32 and the table-top, for convenience in forcing the slide forwardly or backwardly.

The slide may be confined against the tabletop by means of a stationary supporting guide bracket or plate 33, having its side edges turned up to form opposite parallel ways or guides 34 for the slide 29. The latter may have an incision 35,providing aspring-tongue 36, bearin against a guide 34, and aifording sufficient friction to retain the slide 29 firmly wherever it is adjusted. Said supporting and guiding plate 33 is staked, riveted or otherwise secured to the top of the table, as at 37.

The slide 29 and the guide 33 are arranged diagonally, extending in the same direction as the slot 26 in the line-space lever when seen at the end of its driving stroke, as at Figure 4:. The fulcrum-pin 17 may therefore be adjusted forwardly or backwardly by means of the finger-piece-31 thereon, while the lever 10 re mains in the Figure 4 position, and without vibrating the lever. The object in providing for the adjustment of the fulcrum-pin in this diagonal direction, is to insure that'no' matter what the length of driving stroke of the lever 10 may be, it will always be arrested, together with the spacing pawl, the ratchet-wheel and the platen, by means of the overthrow-stop 27, whose position remains fixed. In other words, the stroke of the line-space lever is variable in a number of ways; but in all of its strokes, of whatever length, it comes to the same stopping position, with the pawl against said stop 27.

It will thus be seen that by pivoting or connecting the driving member of the line,- space lever to a movement-multiplying arm, the latter carrying the multiple-tooth linespace pawl, and by forming the ratchet-wheel with a great multiplicity of finely-pitched teeth and giving it a maximum stroke of say 120 degrees, and by having the fulcrum-pin 17 stationary and firmlv supported upon a slide for universal adjustment, a very simple driving train is provided between the linespacing fingenpiece 39 and the short geartrain which forms the movement-reducing element between the line-space wheel and the platen, so that the desired result may be obtained without using more than two gears, with a simple, light, inexpensive, compact train going from the line-space finger-piece 39 to said gears.

When it is desired to efiect an adjustment of the line-space lever fulcrum-pin 17 by means of the finger-piece 31, the line-space lever may, if desired, be swung to Figure 4 position, with the axis of the slot 26 coincident with the diagonal path of adj ustment of the fulcrum-pin 17, Figure 1; where-' by adjustment of the fulcrum-pin to any sired point may be effected without the need of stirring the line-space lever from the ure 4 position. When, however, the linespace lever is in normal position, Figure 1, its slot 26 lies at anangle relatively to its position at Figure 1. If the fulcrum-pin 17 is forced rearwardly by means of its finger-piece or head 31, when lever 10 is in Figure 1 position, its direction of adjustment being determined by the slide 29 and the fixed guides 34, it will'result that the linespace lever will be forced to vibrate idly towards the left at its rear end, together with pawl-arm 19. A shoulder 40 on the forward part of said lever normally presses agains a stop 41. I

The rearward adjustment of the fulcrumpin 17 shortens the rear arm of the lever 10 and lengthens the forward arm, so that ample regulation can be secured by means of a relatively short travel of said fulcrum-pin, thus conducing to efiiciency as well as compactness and lightness of mechanism.

To the lower end of the fulcrum-pin 17 may be swiveled a guide-block 42, having side grooves 43 to fit over the edges of slot 26 in the line-space lever 10, to afford stability and minimize wear. At its forward end the lever-slot 26 may have an enlargenent 44, permitting the guide-block 42 to be inserted or removed, and facilitating the assemblage of the lever and fulcrum-pm. The guide-block 42 and the lever are supported by a collar 45 that is secured upon the lower end of fulcrum-pin 17.' The latter at its upper end is threaded into finger-piece 31, which has the form of a nut, to draw the fulcrum-pin upwardly and thereby cause a collar 46 to press up against the-b0 tom of the slide 29. Said collar fits over a reduced upper shank-portion 47 of the fulcrum-pin. 17.

Upon the latter is placed a collar orwasher 48, resting upon the shoulder of the pin l7, and drawn up thereby against the collar 46, which has also a shoulder. The finger-nut 31 it will be seen is threaded upon the shank 47 of the pin. Said finger-piece 31 extends up through diagonal slot 32 in the table-top 30. The supporting plate 33 may have corresponding diagonal slot 49 to accommodate the travel of the collar 46. The mounting of the adjustable fulcrum-pin dire *t-ly upon a stationary element, insures rigidity of the pin, and contributes to accuracy of operation, while the adjustment of the pin is simplified and improved. The table-top 30 may be provided with an index at 50 and scale 51, for use in adjusting the pin along the slot 32.

From the foregoing it will be seen that the platen may be line-spaced repeatedly by operating the carriage-returning lever 10, since the latter imparts to the line-space wheel 22 repeated rotations through a much greater angle than the vibration of the linespace-lever; the movement of said line-space wheel being transmitted through vertical arbor 21, pinion 24, gear 25 and axle 15 to the platen; the drive stroke of the line-space lever being arrested by the overthrow-stop 27 and its return stroke being arrested by the stop 41. Owing to the fineness of the pitch of the teeth 23, the possible error in the stroke of the wheel is made very slight, and this tolerance is further reduced by the co-operation of the small pinion 24 and the large gear 25, the latter being preferbly of greater diameter than the platen. At any time the fulcrum-pin 17 may be set forwardly or backwardly by the finger-piece 31, thus affording a variation in the rotation of the line-space wheel and platen for the same stroke of the lever. The latter is returned to normal position by a prin 52, bearing againt a lever-pin 53, the other end of the spring 52 hearing at 54 against the flange or side of the table 11. The lever 10 at its rear portion is curved or formed into a goose-neck at 55 to clear the vertical main arbor 21, etc.

The pawl-lever 19 may be provided with a hub 56, which is pivoted upon a general shaft or bearing-post or stem 57, which is dropped from the table-top 30, and is made hollow to serve as a bearing for the vertical arbor 21, line-space wheel 22 and pinion 24. The hub of the pawl-lever 19 rests upon a shoulder 58 that may be formed upon the lower portion of said shaft, and the latter is drawn upwardly by a fastening nut 59, which is threaded upon the upper endof the post that extends up through a hole in the tabletop 30. A collar 60 is confined between the table-top and a shoulder 61 on the shaft, and this collar enables the screw 59 to force the shaft firmly up to a seat, so that its rigidity during the operation of the machine is assured.

The pawl-lever 19 is confined loosely between the shoulder 58 and the collar 60. The pawl-arm 19 overlies the ratchet-wheel 22, and the pawl 20 is pivoted at 62 to the under side of said arm 19.

It will be seen that by a simple swing of the lever 10 to the right about fulcrum 17, the lever 19 is turned about the general hearing post 57, thus carrying the pawl 20 and the ratchet-wheel 22, together with vertical shaft 21 and pinion 24, whereby the gear 25 and the platen-axle are rotated. The number of parts is thus minimized, action is direct, and efiiciency and accuracy are secured,

as well as compactness, simplicity, cheapness, and ready applicability to existing machines; the invention not being limited to the aforesaid Underwood noiseless machine. The variability of the relative'lengths of the arms of lever 10 gives ample scopeof universal variation of the measurement of the linespace unit. The results are gained by means of positively moving parts, avoiding liability of erroneous action which would be apt to arise if frictional driving had to be depended upon. 7

It will be understood that the normal poition of the pawl-arm 19 is different for connecting the pawl 20 from the linespace 2 cept and release the pawl.

wheel 22, thereby to permit independent rotation of the platen either forwardly or back- Wardly, by means of one of the hand-wheels 16 or by means of a thumb-wheel 63. The latter it will be seen is fixed upon the projecting top of the vertical line-space-wheel shaft 21; and it will be understood the platen rotates at the same angular speed as 16 but at much less angular speed than 63, whereby fine adjusment of the work-sheet is afiorded at any time by means of 63, in view of the normal disconnection of pawl 20 from line-- space wheel 22.

It is desired to secure accuracy of stroke of the line-space wheel at the line-spacing operation, and for this reason the multipletooth pawl 20 must come accurately into automatic mesh with the ratchet-wheel at the beginning of the drive stroke of lever 10. This engagement of the pawl is effected by its returning spring 64, under the control of a cam 65, which normally restrains the pawl by means of a pin 66 that is provided upon pawl-arm 67. This cam, it will be understood, lies in the path of the pin 66, to be struck thereby at the conclusion of the return stroke of the line-spacing train, whereby the pawl is cammed out of mesh with the ratchet-wheel 22, Figure 1. One of the features of the invention is the provision of means whereby this release of the pawl, and its re-engagement with the wheel, are properly timed, throughout all of the variations in the measurement of the line-space unit which are secured by different adjustments of the fulcrum-pin 17 This is accomplished without depending upon uncertainly-operating friction devices for controlling the engaging and disengaging movements of the pawl 20. This positive action is secured by simple means, inasmuch as the adjustment of the line-space lever fulcrum-pin 17 is also made effective to adjust the position of the pawlreleasing cam 65. This result is secured by providing a earn-train, and in many respects this cam-train is coincident with the linespace lever train, see Figure 1.

The pawl-controlling cam-train includes an arm or lever 68 which is fulcrumed upon the same general shaft or hearing post as the pawl-arm 19, so that it may swing around said shaft to any desired position to inter- Said arm 68 is articulated at 69 to a forwardly-extending lever 70, having a goose-neck portion 71 and a longitudinal slot 72, so that said lever mainly resemblesin plan and displacement the line- 1 space lever 10; the pivot 69 being coincident with 18, the lever bearing. 73 being concentrio with the shaft 57, the lever having goose-neck 71 and the slot 7 2 of the lever being fitted to the same fulcrum-pin 17 that is used for the line-space lever 10.

When the pin 17 is adjusted along the linespace lever, it is simultaneously adjusted along the cam-lever 70, and to the same extent. The effect is the same upon both trains. If the parts are in the Figure 1 position during such adjustment, both the line-space lever and the cam-lever will be swung to the left to the same extent; and the same will be true of the cam-lever 68 and the pawl-lever 19, as well as the pivots 18 and 69. Rearward adjustment of the pin 17 will therefore effect a reduction in the driving stroke of the pawllever 19, thereby to reduce the stroke of the ratchet-wheel, while the cam 65 swings to a correspondingposition toward the left, so that thereafter the pawl may sooner be withdrawn automatically from the ratchet-wheel, but with exactness of timing; and it is also re-engaged to the ratchet with exact timing upon the starting of the succeeding line-spacing stroke. 7

It will be seenthatan advantage is gained in using a line-spacing lever which is pivoted at its driving point to a movement-multiplying pawl-lever, inasmuch as the pawl-releasing device may be located bymeans of the same device 17 which varies the extent of stroke of the levers 10 and 19. The adjustment of cam 65 is automatic and exact, simply efi'ected, and dependable. J t is a feature of the invention that universal variation is obtainable in the extent of stroke of the pawlarm 19, and a concomitant resetting of the pawl-controlling cam 65 to anexactly corresponding extent; and since theadjustment of 65 is mechanically effected without attention of the operator to'said cam, the operator needs only to adjust the single pin 17. 7

The coincidentlevers 10' and 70 may be compactly placed facewise, one above the other, in the machine, Figure 7, the vertical fulcrum-pin 17 being common to the levers, passing through both. Coincident with 18 is pivot 69, connecting-arm 68 tothe bail which includes the rear end of lever 70,- said bail having arm 74 which has a bearing 7 3 thatis coincident with the bearing 75 of bail-arm 68. Said

arms

74 and 68 it will be seen may be formed as a bail in one piece, with an intervening vertical web-plate 76 the arm 74 overlying 68, see Figure 6. The lower bail-arm 68 may rest upon a flange 77 that is formed upon the bottom of bearing 57; and hub or bearing 75 may be fitted upon said bearing 57 for rocking motion. The upper bail-arm 74 may be fitted at 7 3 upon a cylindrical portion of shoulder 61 that is formed on the collar 60. This bail-

structure

74, 76, 68 may therefore be confined between 77 and 60 for pivotal motion, to permit adjustment of the cam 65.

v provided for effectinguniversal variation in to l tions.

the measurement of the line-spacing unit, the strokes of the line-space lever being positively limited in both directions for all adjustments, and the line-space pawl being automatically released from the line-space wheel and automatically re-engaged therewith, with exactness of timing in correspondence with any adjustment. The last is effected by merely slipping the finger-piece 31 along the slot 82. The parts are firmly supported throughout, and reliability of action is secured for any desired adjustment.

The table 11 may comprise a top plate 30 and a depending flange, and may overlie the ieversystem and the line-space wheel. Said table may extend from the left from a verti- -cal.bracket in the form of a plate 7 8 that is secured byrscrews 79 upon the left-hand carriage-end 12 of said noiseless machine; said "end having a'bearing 81 for the platen-axle.

An auxiliary vertical bracket 82 may be se cured by screws 83 to the left-hand end of the carriage 13 in said machine, and may rise "at the left of the gear 25 and have a bearing "for the platen-axle 15. It may also be provided witha bent-out flange 84, to form a bearing for the lower end of the vertical main shaft 21. This bracket 82 may, at its top, be bent to the left'to form a plate 85 having atits left-hand end the bent-up beveled stop 27. A brace 86 may also be extended up from 85 and secured by screws 87 to the flange at the left-hand side of the table. The improvement may be manufactured and supplied as'a unit for attachment to noiseless machines.

The aforesaid arrangement of coincidently mounted line-spacing and space-measuring trains is of advantage not only for its capacity for minutely varying the measurement of the line-space unit, but also because of an added feature that the trains may be made to do further duty in regulating the gross line spacing stroke of lever 10. It is desired in such regulation, that the platen shall be rotated at each stroke for either single, double or triple line-spacing; and preferably also for half-line-spacing and also one 7 and a quarter, one and a half and two and a half line-spaces for each stroke. This adj ustment involves simply setting the lever 70 edgewise to corresponding stations or loca- Said lever has a locating tooth 88 adaptedto seat in any one of a range of notches 89 cut in the bottom edge of the front flange 90 of the table; said flange having a beveled reading face 91 having thereon designations 92 for the gross line-space regulation. It will be seen that Wherever the regulator-lever is set, its stop 41 will serve to arrest the shoulder of the line-space lever 10, and determine for how many line-space units the platen shall be rotated at each stroke, rega'rdless of the measurement of the line-space unit that is determined by the adjustment of the fulcrum-pin 17. When setting the regulator-lever 70, it will be seen that the multiple-tooth pawl 20 will be maintained out of engagement with the ratchet-wheel, because the releasing cam is adjusted together with said lever 70, owing to the pivoting of the cam-arm to the lever. The lever may be swung to the right as far as it is desired, from the Figure 4 position, without imparting any rotation to the platen, which is a desideratum. If desired the line-space lever 10 may be held in its Figure 4 position during the resettings of the regulator 70, although, if required, the two

levers

10 and 70 may be swung together to either left or right during such adjustment, and in no case will the pawl 20' be engaged, or the platen rotated. 7

The tooth 88 may project forwardly from a leaf 93 that may be pivoted upon pins 9 1 projecting from the sides of the regulatorlever 70; and a spring 95 may hold the tooth 88 up in any notch, A finger-piece 96 may be carried by the tooth. oaidleaf may be guided between flanges 97 turned down at the, sides of the forward end of lever 70. A detachable stop 98 may be provided upon the lever 70 to lock the latch leaf 93 against rearward dis-placement; said leaf having notches 99 whereby it is detachably pivoted upon the opposite pins 9%.

In the diagram at Figure 5, 89 represents the line of space-regulating notches. Fulllines A represent the normal positions of the line-spacing levers when the machine is adjusted for three lme-spaces of maxnnumunit measurement; this corresponding to Figure 1. Three-unit spacing may be obtained forany measurement of unit, and fulllines B represent the normal position of the line-space levers when the fulcrum-pin 17 has been adjusted backwardly to provide a minimum measurement of the line-space unit,

lever 10 is indicated at D. But from every starting position A, B and C, the lever swings to one final position E.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others; as, for examples, the gross line-space regulatortrain can be employed for full and fractional line spacin even if no adjustmentof the fulcrum-pin 17 is provided, and in some cases the returnstop 41 need not be adjustable, and may be omitted from the regulator-train.

Having thus described my invention, I claim:

1. In a line-spacing mechanism, the combination of a line-spacing wheel, a line-space lever having a fulcrum, a movement-multiplying arm to which is pivoted said line-space lever, the latter having a driving clutch for said line-space wheel, said clutcharm being pivoted to turn about the axis of the linesp'ace wheel, and adjustable means co-operative with said fulcrum for varying the lever age of the line-space lever upon the clutcharm.

2. In a line-spacing mechanism, the combination of a line-spacing ratchet-wheel having a multitude of teeth of minute pitch, a line-space lever having a fulcrum which is stationary at the line-spacing operation, a

movement-multiplying arm pivoted to said line-space lever and having a driving pawl for said line-space wheel, said pawl-arm being pivoted to turn about the axis of the line space wheel and having a maximum stroke of about 120 degrees, and means for adjusting said fulcrum.

3. In a line-spacing mechanism, the combination of a line-spacing ratchet-wheel having a multitude of teeth of minute pitch, a line-space lever, a movement-multiplying arm connected to said line-space lever and having a driving pawl for said line-space wheel, said line-space lever vibrating upon an axis which is parallel with the axis of the line-space wheel, said pawl-arm being pivoted to turn about the axis of the line-space wheel, said line-space lever having a fulcrum, and means aifording an adjustment of said fulcrum, the latter being stationary during the line-spacing operation.

l. In a line-spacing mechanism, the combination of a line-spacing ratchet-wheel, a line-space lever of the first order and having a fulcrum which is stationary during the line-spacing operation, a movement-multiplying arm connected to said line-space lever and having a driving clutch for said linespace wheel, said clutch-arm being directly pivoted to the end of said line-space lever, the latter vibrating upon an axis which is parallel with the axis of the line-space wheel, said clutch-arm being pivoted to turn about the axis of the line-space wheel, adjustable Vmeans for varying the leverage of the linespace lever upon the clutch-arm, and means affording an adjustment of said fulcrum, the axis of the line-space Wheel being between the fulcrum of the line-space lever and the point of connection of the latter to the pawl-lever.

In a line-spacing mechanism, the co1nbination of a line-spacing Wheel, a line-space lever having a fulcrum, a movement-multiplying arm to wnich is pivoted said linespace lever, the latter having a driving clutch for said line-space Wheel, said clutch-arm being pivoted to turn about the axis of the line-space wheel, adjustable means co-operative with said fulcrum for varying the leverage of the line-space lever upon the clutcharm, an arbor upon which said line-space wheel is secured, a small bevel pinion also fixed relatively to said arbor, a large gear meshing with said pinion, and a revoluble work-sheet carrier driven by said large gear.

6. In a line-spacing mechanism, thecombination of a line-spacing wheel, a line-spacelever having a fulcrum, a movement-multiplying arm to which is pivoted said linespace lever, the latter having a driving clutch for said line-space wheel, said clutch-arm being pivoted to turn about the axis of the l nespace wheel, adjustable means co-perative with said fulcrum for varying the leverage of the line-space lever upon the clutcharm, an arbor upon which said line-space wheel is secured, a small bevel pinion upon said arbor, a large gear meshing with said pinion, a revoluble platen driven by said large gear, and a thumb-wheel upon said line-space-wheel arbor.

"Z. In a line-spacing mechanism, the combination of a line-spacing wheel, a line-space lover, a movement-multiplying arm connected to said line-space lever, and having a normally released self-closing driving clutch for said line-space wheel, said line-space lever having a fulcrum and also having two arms, means 'aifording an adjustment of said fulcrum along the lever to change the relative length of the two lever arms, the fulcrum being stationary during the line-spacing operation, an arbor for said line-space wheel, a pinion upon said arbor, a gear meshing with said pinion, a platen driven by said large gear, and a thumb-Wheel upon said arbor. I

8. In a line-spacing mechanism, the combination of a line-spacing ratchet-wheel having a multitude of teeth of minute pitch, a line-space lever, a movoment-multiplying arm connected to said line-space lever and having a driving pawl for said line-space wheel, said line-space lever vibrating upon an axis which is parallel with the axis of the line-space wheel, said pawl-arm being pivoted to turn about the axis of the line-space wheel, said line-space lever having a fulcrum, means alfording an adjustment of said lit) fulcrum, the latter being stationary during the line-spacing operation, an arbor upon which said line-space wheel is secured, a small bevel pinion also fixed relatively to said arbor, a large gear meshing with said pinion,

being stationary during the line-spacing operation, and separate independently settable means for determining the number of units of space through which said lever line-spaces the work-sheet at each operation,

10. The combination of a line-space wheel, line-space lever having a minutely-variable fulcrum which is stationary during the linespacing operation, a pawl for said wheel, driving means connecting said lever to said pawl, means settable independently of said fulcrum for determining the number of units of space through which said lever line-spaces the work-sheet, and a stationary stop for arresting said pawl and preventing overthrow of the line-space wheel, the adjustment of said fulcrum being in a direction such that at all adjustments thereof said line-space lever is arrested by said stationary stop.

11. The combination of a line-space wheel, a. line-space lever having a minutely-variable fulcrum which is stationary during the linespacing operation, a pawl for said wheel, driving means connecting said lever to said p wl, means settable independently of said fulcrum for determining the number of units of space through which said lever line-spaces the work-sheet, and a stationary stop for arresting said pawl and preventing overthrow of the line-space wheel, said lever having a longitudinal slot along which said fulcrum-pin is adjustable, and said slot being so formed that when the lever is arrested by said step, the direction of its said slot is coincident with the direction of adjustment of said fulcrum-pin.

12. The combination of a line-space wheel, a line-space lever having two arms, a clutch for said wheel, means connecting said lever to said clutch, a fulcrum for said lever which is stationary during the line-spacing operation, a slide upon which said fulcrum is rigidly fixed, said slide and fulcrum being movable along the lever to change the relative length of the two lever-arms, means for guiding said slide, and a finger-piece for operating the slide.

13. The combination of a line-space wheel, aline-space lever, a clutch for said wheel, a fulcrum for said lever which is stationary during the line-spacin operation, a slide upon which said fulcrum is rigidly fixed, means ior guiding said slide, a finger-piece for operating the slide, means for retaining said slide where adjusted; said fulcrum projecting from said slide to co-operate with said line-space lever, and an arm to operate said clutch, said arm directly pivoted to said lever and also mounted to swing about the axis of said line-space wheel.

14. The combination of a line-space wheel, a line-space lever, a clutch for said wheel, a fulcrum for said lever which is stationary during the line-spacing operation, aslide upon which said fulcrum is rigidly fixed, means for guiding said slide, a finger-piece for operating the slide, means for retaining said slide where adjusted; said fulcrum projecting from said slide to co-operate with said line-space lever, an arm to operate said clutch, said arm directly pivoted to said lever and also mounted to swing about the axis of said line-space wheel, and an overthrowpreventing stop engageable by said clutch, said lever having a fulcrum-slotwhich is parallel with said slide-guide when the lever is arrested by said stop.

15. The combination of a line-space wheel having a great multitude of teeth of minute pitch, a line-space lever having two, arms, a pawl for said wheel, driving means connecting said lever to said pawl, a fulcrum for said lever which is stationary during the line-spacing of the platen, a slide upon which said fulcrum is rigidly fixed, said slide and fulcrum being movable along the lever to change the relative length of the two leverarms, means for guiding said slide, a fingerpiece for operating the same, means for retaining said slide where adjusted, separate means adjustable independently of said fulcrum for determining the number of units of space through which said lever line-spaces the work-sheet at each operation, and a stop for arresting said pawl and preventing overthrow, the direction of adjustment of said slide being such that at all adjustments thereof said line-space lever is arrested by said stop.

16. The combination of a line-space wheel, a line-spacing train including a line-space lever, a wheel-driving clutch, a driver for said clutch, said driver connected to said lever,'a line-space-regulator train which is mainly a doubling of said line-spacing train and includes a regulatordever coincidently fulcrumed with said line-space lever and having connected thereto a regulator-arm whose pivoting and lever-connection are co incident with those of said driver, said regulating arm having means for releasing said clutch from said wheel, a device common to both levers for varying their leverage, a linespace-regulating set of stations, means to detain said regulatordever selectively at different stations, and a clutch-locking stop to arrest said line-space lever at the same position for driving strokes of varying lengths.

17. The combination 'with a line-space wheel, of a line-spacing drive-train, a linespace-regulator train for said line-spacing train and including a regulator-lever having pivoted thereto a regulator-arm, the latter pivoted concentrically with said wheel and having means for controlling the connection I of said drive-train with said wheel, and a 1 device for minutely varying the leverage of said regulator-lever.

18. The combination with a line-space wheel, of a line-spacing drive-train, a linepace-regulator train for said line-spacing train and including a regulator-lever having pivoted thereto a regulator-arm, the latter pivot-ed concentrically with said wheel and having means for controlling the connection of said drive-train with said wheel, a device for minutely varying the leverage of said regulator-lever, means, to detain said regulator-lever selectively at difierent set stations, and an overthrow preventing stop to arrest said driving train at the same position for driving strokes of all extents.

19. The combination of a line-space wheel having a multitude of minute teeth, a linespacing train including a line-space lever, a wheel-driving pawl, and a driving arm for said pawl, said driving arm pivoted to said lever and also pivoted to turn about the axis of said wheel, a line-space-regula'tor train which is mainly a doubling of said line-spacing train andincludes a regulator-lever coin- K; cidently fulcrumed with said line-space lever and having pivoted thereto a regulatorarm which is coincidently mounted and pivoted with respect to said pawl-arm, said regulating arm having means for releasing said pawl from said wheel, a single device for adjusting the fulcrums of both levers, a rack, and means to detain said regulator-lever selectively at different points in said rack.

20. The combination of a line-space wheel 'havin a multitude of minute teeth, a linespacing train includin a line-space lever, 21'

wheel-driving pawl, and a driving arm for said pawl, said driving arm plvoted to said lever, and also pivoted to turn about the axis of said wheel, a line-space-regulator train which is mainly a doubling of said line-spacing train and includes a regulator-lever coincidently fulcrumed with said line-space lever and having pivoted thereto a regulator-arin wl 'ch is coincidently mounted and pivoted with resp ct to said pawl-arm, said regulating arm having means for releasing said pawl from said wheel, a single device for ad- 7 justing the fulcrums of. both levers, a rack, means to detam said regulator-lever selecstop to arrest said line-space lever at the same position for driving strokes of varying extents.

21. The combination with a line-space wheel, of a driving train therefor, including a line-space lever, an arm pivoted thereto, a clutch operated by said arm for driving said line-space wheel, a stop to arrest the driving stroke of the line-space lever, a line-spaceregulating train effective upon the return movement of said line-space lever, said regulating train including a lever and means pivoted thereto to release said clutch from said wheel, said releasing means forming mainly a double of said clutch-arm, the pivot which connects said line-space lever to said clutch-carrying arm being coincident with the pivot that connects the regulating lever with the clutch-releasing means, said clutch-arm being co-incidently mounted with said releasing means, and means including a system of stations for selectively positioning said linespace-regulating train for various full linespacing movements and also various fractional line-spacing movements.

22. The combination with a line-space wheel having teeth, of a driving train therefor, including a line-space lever, an arm pive oted thereto, a pawl operated by said arm for driving said line-space wheel, an overthrowpreventing stop to engage said pawl and ar rest the driving stroke of the line-space lever, a line-space-regulating train effective at the return movement of said line-space lever, said regulating train having means to release said pawl from said wheel, said releasing means forming mainly a double of said pawl-arm, the pivot which connects said line-space lever to said pawl-arm being coincident with the pivot that connects the regulating leverwith the pawl-releasing means, said pawl-arm being coincidently mounted with said releasing means, and means including a system of stations for selectively positioning said line'- space-regulating train for various'full linespacing movements and also various fractional line-spacing movements. 7

23. The combination with a line-space wheel, of a driving train therefor,.including a line-space lever, an arm pivoted thereto, a clutch operated by said arm for driving said line-space wheel, a stop to arrest the driving stroke of the line-space lever, .a line-spacemeans, and a locating rackto co-operate with said regulator-lever to retain it selectively at predetermined full-space and fractionalspace locations, said regulator-lever and said line-space lever having a common adjustable fulcrum, and said clutclrarm and said releasing means being mounted concentrically with said line-space wheel.

24. The combination with a line-space wheel, of a driving train therefor, including a line-space lever, an arm pivoted thereto, a clutch operated by said arm for driving said line-space wheel, a stop to arrest the driving stroke of the line-space lever, a line-spaceregulating train effective upon the return movement of said line-space lever, said regulating train including a lever and means piv oted thereto to release saidclutch from said wheel, said releasing means forming mainly a double of said clutch-arm, the pivot which connects said line-space lever to said clutcharm being coincident with the pivot that connects the regulating lever with the clutchreleasing means, said clutch-arm being coincidently mounted with said releasing means, a locating rack to co-operate with said regulator-lever to retain it selectively at predetermined locations, said regulator-lever and said line-space lever having a common adjustable fulcrum, said clutch-arm and said releasing means being mounted concentrically with said line-space wheel, an arbor for said linespace wheel, and a fixedshaft within which said arbor is journaled, said clutch-arm and ;releasing means being pivoted upon said shaft.

25. In a line-spacing mechanism for a typowriting machine having a revoluble platen, the combination of a line-space lever having two arms, a movement-multiplying arm to which said line-space lever is pivoted, a pawl driven by said movement-multiplying arm, a fine-toothed line-space wheel engageable by said pawl, the connection being such that said pawl-arm, together with said line-space Wheel, is vibrated through. a far greater angular extent than said line-space lever, movement-reducing gearing between said linespace wheel and said revoluble platen, and means for adjusting thefulcrum of the linespace lever longitudinally of said lever, to change the relative length of the two leverarms. 7

26. In a line-space mechanism for a typewriting machine, the combination of a linespace wheel, a line-spacing train including both a lever and a movement-multiplying arm pivoted thereto, the arm being mounted to rotate coaxially with said line-space wheel, a clutch operated by said arm, a line-spaceregulating train forming mainly a double of said line-spacing train and'including a lever and a releasing device for said clutch, and means for varying-the leverage of said linespace lever upon said movement-multiplying arm and concomitantly varying the leverage of said regulating lever upon said releasing device, said regulating lever being adjustable.

27. The combination of a line-space wheel, a line-spacing train which includes both a lever and a movement-multiplying arm to which the lever is directly pivoted, said arm mounted to rotate coaxially with said linespace wheel, a clutch for connecting said arm to said wheel, a line-space-regulating train forming mainly adouble of said line-spacing train and including a lever, said levers having coincident adjustable fulcrums, said regulating train including a clutch-releasing arm pivoted to said regulating lever coincidently with the pivot of said clutch-arm to the linespace lever, a system of stations, and means for detaining said regulating arm at any station.

28. The combination with a line-space wheel, of a line-space handle in the form of a lever of the first order, a support having mounted thereon for adjustment a fulcrumpin for said lever, a movement-multiplying clutch-arm to which said lever is directly pivoted, said clutch-arm being in the form 01 a lever of the third order and being pivoted concentrically with a said line-space Wheel, and effective to drive the latter, and

.movement-reducing gearing'for connecting said line-space Wheel to an element to be linespaced. 7

29. The combination with a line-space wheel, of a line-space handle in the form of a lever of the first order, a support having mounted thereon for adjustment a fulcrumpin for said lever, a movement-multiplying clutch-arm to which said lever is directly pivoted, said clutch-arm being in the form of a lever of the third order and being pivoted concentrically with said line-space wheel, and effective to drive the latter, movement-reducing gearing for connecting said line-space wheel to an element to be line-spaced, said line-space Wheel being movable by said clutchlever through about 120 degrees at maximum stroke, and a thumb-wheel mounted on said movement-reducing gearing.

30. In a line-spacing mechanism, the combination of a line-spacing wheel, a line-space lever having a fulcrum, a movement-multiplying arm to which is pivoted said line-space lever, the latter having a driving clutch for said line-space wheel, said fulcrum-pin being made adjustable to different positions lengthwise of the line-space lever, the lever having a slot for the fulcrum-pin, a slide upon which said fulcrum-pin is fixed, and means for guiding said slide, the latter being provided with a fingerrpiece.

31. In a line-spacing mechanism, the combination of a line-spacing wheel, a line-space lever having a fulcrum, a movement-multiplying arm to which is pivoted said linespace lever, the latter having a driving clutch for said line-space wheel, said fulcrum-pin being made adjustable to different positions lengthwise of the line-space lever, the lever having a slot for the fulcrum-pin, a slide upon which said fulcrum-pin is fixed, means for guiding said slide, the latter being provided with a finger-piece, and independent means, including a rack and a member adjustable along said rack, for selectively determining the length of stroke of the linespace lever without disturbing the adjustment of said fulcrum-pin.

32. The combination of a line-space wheel, a line-spacing train including a line-space lever, a wheel-driving clutch, and a driver for said clutch, said driver connected to said lever, a line-space-regulator train which is mainly a doubling of said linespacing train and includes a regulator-lever coincidently fulcrumed with said line-space lever and having connected thereto a regulator-arm whose pivoting and lever-connection are coincident with those of said driver, said regulating arm I having means for releasing said clutch from said wheel, a fulcrum-pin, common to both levers, being made adjustable to different positions lengthwise of the levers, each lever having a slot for the fulcrum-pin, and a slide upon which said fulcrum-pin is fixed, said slide being provided with a finger-piece and with guiding means, and being stationary during the line-spacing operation.

33. In a line-spacing mechanism, the combination of a line-spacing wheel, a line-space lever having a fulcrum, a movement-multiplying arm to which is pivoted said line-space lever, the latter having a driving clutch for said line-space wheel, a stop for arresting the line-space lever and wheel, and constructed to maintain engagement of the clutch with the wheel, a table above said wheel and lever, a slide having a fulcrum-pin for said lever, a guide being provided upon said table for said fulcrum-pin slide, and means to maintain s id slide where it is adjustechsaid lever having a fulcrum pin slot and said guide eXtend ing in the same direction as the slot in the line-space lever when it is at the end of its driving stroke.

3%. In a line-spacing mechanism, the combination of a line-spacing wheel, a line-space leverhaving a fulcrum, a movement-multiplying arm to which is pivoted said line-space lever, the latter having a driving clutch for i said line-space wheel, a stop for arresting the line-space lever and wheel, and constructed to maintam engagement of the clutch with the wheel, atable overlying said wheel and lever, a slide having a fulcrum-pin for said lever, a support and guide for. said slide fastened upon said table, said lever having a slot, guiding means forsaid slide extending in the same direction as the slot in the line space lever when at the end ofits driving stroke, a guide-block provided upon said fulcrum pin and fitted to the slot in said lever,

stroke of the line-space lever, a line-spaceregulating train effective upon the return movement of said line-space lever, said regulating train including a lever and means pivoted thereto to release said clutch from said wheel, said releasing means forming mainly a double of said clutch-arm, the pivot which connects said line-space lever to said clutcharm being coincident with the pivot that connects the regulating lever with the clutchreleasing means, said clutch-arm being coincidently mounted with said releasing means, a fulcrum-pin common to said levers, a slide from which said fulcrum-pin projects, and a guide for said fulcrunrpin slide, each of the levers being longitudinally slotted for said pin, said guide extending in the same di rection as the slot in the line-space lever when the latter is at the end of its driving stroke.

36. In a line-spacing mechanism, the combination of a line-spacing wheel, a train'of' driving devices therefor, including a lever, said lever having a supportlng member which is fixed relatively to the framework during the line-spacing operation, said supporting member being adjustable relatively to said lever, to afford variation in the measurement in the line-spacing unit, and independentlyadjustable means for use in determining the number of units to be included in the linespace operation.

37. The combination of a line-space wheel, a line-space lever, an adjustable fulcrum forv said lever, a movement-multiplying and clutching device for connectlng said lever to the line-space wheel, a clutch-locking stopfor arresting the drive-stroke of the lever, an adjustable stop for the return stroke of the lever, and clutch-releasing means adjustable simultaneously with said stop andito a corresponding extent.

38. The combination of a line-spacing Wheel, a train of driving devices therefor, in-

cluding a lever, said train having a supporting member which is fixed relatively to the framework during theline-spacing operation, said supporting member being adjustable to afford variation in the measurement in the line-spacing unit, and said supporting member having a fulcrum for said lever, a movement-multiplying and clutching device being provided for connecting said lever to the linespace wheel, a clutch-locking stop for arrestint lid

ing the drive stroke of the lever, an adjustable stop for the return stroke of the lever, adjustable clutch-releasing means, and inde pendently-adjustable means for use in determining the number of units to be included in the line-space operation.

39. The combination of a member to be line-spaced, a line-space wheel, a pawl, a pawl-arm, a driver, a table, an arbor upon which said line-space wheel is fixed, a fixed shaftor bearing-post through which said arbor extends, said pawl-arm having a hub whereby it is pivoted to saidshaft, means securing said shaft to the bottom of said table, a pinion fixed upon said arbor, a gear meshing with said pinion and driving said member, said shaft having a shoulder upon which rests the hub of saidpawl-arm,afastening nut threaded upon the upper end of said shaft to draw it up against said table, and a collar confined between the table-top and the shaft to enable the nut to force the shaft firmly up to its seat, said arbor extending up through the table and provided thereover with a thumb-wheel.

40. In a line-spacing mechanism, the combination with a line-space wheel, of a driving train therefor including a lever, a movementmultiplying arm driven thereby, a clutch actuated by said arm, said clutch being normally disengaged from said wheel and provided with means for automatically clutching the arm to the wheel upon the starting of said lever in motion, a clutch-locking stop to limit the line-spacing stroke of the lever, an adjustable arm having a clutch-releaser, and a regulating lever connected to said clutch-releasing arm, said clutch-releaser effective to keep the clutch released throughout all adjustments of said adjustable arm, whereby the arm may be selectively set without disturbing said line-space wheel.

41. In a line-spacing mechanism, the combination with a line-space wheel having fine .teeth, of a driving train therefor including a lever, a movement-multiplying arm driven thereby, a pawl actuated by said arm, said pawl being normally disengaged from said wheel and provided with means for automatically clutching the arm to the wheel upon the starting ofsaid lever in motion, a pawl-locking stop to limit the line-spacing stroke of the lever, an adjustable arm having a pawl-releaser, and a regulating lever coni nected to said pawl-releasing arm, said regu lating lever having a stop for said line-space lever to arrest its return stroke, said pawlreleaser connected to move together with said stop to keep the pawl released throughout all adjustments of said regulating train, whereby the regulating train may be selectively set without operating said line-space wheel.

42. In a line-spacing mechanism, the combination of a line-spacing wheel, a line-space lever having a fulcrum, a movement-multlplying arm to which is pivoted said line-space lever, said arm having a driving clutch for said line-space wheel, said clutch-arm being pivoted to turn about the axis of the linespace wheel, and adjustable means co-opera tive with said fulcrum for varying the leverage of the line-space lever upon the clutcharm, said clutch having a projection, and a releasing cam in the path thereof, said cam being settable to regulate the length of the line-spacing movement.

43. The combination of a line-space wheel, a line-spacing train including a line-space lever, a wheel-driving clutch, and a driver for said clutch, said driver connected to said lever, a line-space-regulator train which is mainly a doubling of said line-spacing train and includes a regulator-lever coincidently fulcrumed with said line-space lever and having connected thereto a regulator-arm whose pivoting and lever-connection are coincident with those of said driver, said regulating arm having means for releasing said clutch from said wheel, said line-space lever having an adjustable fulcrum, means where by the adjustment of said line-space-lever fulcrum is made effective to adjust the position of the clutch-releaser, said regulatortrain. being adjustable to different set stations, and means whereby the selective setting of said regulator-train is also made effective to adjust the position of said clutchreleasing means.

44:. In a line-spacing mechanism, the com bination with a line-space wheel and a driving train having a normally-released clutch for engaging the wheel, of a regulating train having an adjustable stop for the line-spacing train and having a clutch-releasing cam adjustable simultaneously with said stop, a system of set stations, means for detaining said stop at any one of the set stations, and adjustable means efiective alike upon said driving train and said regulating train for effecting minute variations in the measurement of the line-spacing unit, said line-spacing train and said regulating train being substantially coincident and superposed one upon the other to operate upon a common adjustable fulcrum-pin, and also including members mounted upon a common fixed shaft which is coincident with the axis of the linespace wheel.

45. In a line-spacing mechanism, the combination with a line-space wheel and a driving train having a normally-released clutch for engaging the wheel, of a regulating train having an adjustable stop for the line-spacing train and having a clutch-releasing cam adjustable simultaneously with said stop, a system of set stations, means for detaining said stop at any one of the set sta} tions, and adjustable means effective alike upon said driving train and said regulating train for efi'ecting minute variations in the measurement of the line-spacing unit, said line-spacing train and said regulating train being substantially coincident and superposed one upon the other to operate upon a common adjustable fulcrum-pin, and also in= eluding members mounted upon a common fixed shaft which is coincident with the axis of the line-space wheel, the line-spacing train including a lever operating upon said fulcrum-pin and also including a clutch-arm mounted upon said fixed shaft and pivoted to said line-space lever, said regulating train also including a lever also mounted upon said fulcrum and also including a releasing arm pivoted to said regulating lever co-incidently with the pivoting of said clutch-arm to the line-space lever.

a6. In a line-spacing mechanism, the combination with a line-space wheel, of a driving train having a clutch to cooperate with said wheel, a regulating train for variably limiting the extent of line-space movement, said regulating train including an adjustable clutch-releaser, and adjustable means effective upon both trains for varying the extent of both the wheel-movement and the movement of the power-end of the driving train, and simultaneously and automatically effective to vary to corresponding extent the adjustment of the clutch-releaser, and means for selectively positioning the regulating train at any one of a series of permanently located stations.

l7. The combination of a line-space wheel, a line-spacing train including a line-space lever, a wheel-driving'clutch, a driver for said clutch, said driver connected to said lever, a line-space-regulat r train which is mainly a doubling ofsaid linespacing train and includes a regulator-lever coincidently fulcrumed with said line-space lever and having connected thereto a regulator-arm whose pivoting and lever-connection are coincident with those of said driver, said regulating arm having means for releasing said clutch from said wheel, a fulcrum-pin, common to both levers, being made adjustable to difierent positions lengthwise of the levers, each lever having a slot for the fulcrum-pin, and a slide upon which said fulcrum-pin is fixed, said slide being provided with a fingenpiece and with guiding means, and being stationary during the line-spacing operation, the linespace lever and the regulating lever being placed facewise one over the other, the common fulcrum-pin for said slotted levers being vertical and passing through both slots, said releasing arm in the form of a bail-member, a fixed shaft, said line-space wheel having an arbor in said shaft, said bail having upper and lower bearings upon said shaft, the upper member'of said bail being pivoted to said regulating lever, and the lower member of said bail being the clutc'lrreleasing element, said levers being disposed between the upper and lower members of said bail, said bail resting upon a flange that is formed upon the lower part of the fixed shaft, and a shoulder provided upon saio fixed shaft upon which said upper bail-arm is fitted.

48. The combination of a line-space wheel, a pawl-arm, a driver, a table, an arbor upon which said line-space wheel is fixed, a fixed shaft or bearing-post through whichsaid arbor extends, said pawl-arm having a hub whereby it is pivoted to said shaft, means securing said shaft to the bottom of said table, a'pinion fixed upon said arbor, a gear meshing with said pinion and driving the linespacing element of the machine, said shaft having a shoulder upon which rests the hub of said pawl-arm, a fastening nut threaded upon the upper end of saidshaft to draw it up against said table, a collar confined between the table-top and the shaft to enable the nut to force the shaft firmly up to its seat, said arbor extending up through the table and provided thereover with a thumbwheel, said table overlying the line-spacing lever system and line-space wheel, a bracket for supporting said plate upon the carriage of a typewriting machine, said bracket having a bearing for the platen-axle, and an auxiliary bracket also secured to the 'end of the typewriter-carriage and having a bearing in proximity to said gear for the platen-axle, and also having a portion to form a bearing for the lower ends of the vertical wheelarbor, said bracket bent to form a clutchlocking stop, said bracket also having a brace attached to the left-hand border of the table.

49. The combination of a line-space wheel, a pawl, a pawl-arm, a driver, a table,-an arbor upon which said line-space wheel is fixed, a fixed shaft or bearing-post through which said arbor extends, said pawl-arm having a hub whereby it is pivoted to said shaft, a pinion fixed upon said arbor, a gear mesh-. ing with said pinion and driving the linespacing element of the machine, said shaft having a shoulder upon which rests the hub of said pawl-arm, a fastening nut threaded upon the upper end of said shaft to draw it up against said table, a. collar confined between the table-top and the shaft to enable the nut to force the shaft firmly up to its seat, said arbor extendingup through the table and provided thereover with a thumb-wheel, and means for affording regulation of the gross line-space stroke of the driver for either single, double or triple line-spacing, and also for fractional line-spacing, including a regulator-lever and means for setting the same selectively to different locations, said regulator having a locating tooth, and said ma chine provided with a range of notches to be selectively engaged by said tooth, said notches cut in the border of said table, said regulator-lever having a stop to terminate the return stroke of the line-space driver, said regulating means including a clutch-releaser which is adjusted together with the regulating stop-lever, said regulating stop-lever being movable to any position while maintaining the clutch in released position, and being swingable together with said driver to either left or right during the setting of the regulator, without rotating the line-space wheel.

50. The combination of a line-space wheel, a pawl, a pawl-arm, a driver, a table, an arbor upon which said line-space wheel is fixed, a fixed shaft or bearing-post through which said arbor extends, said pawl-arm having a rub whereby it is pivoted to said shaft, means securing said shaft to the bottom of said table, a pinion fixed upon said arbor, a gear meshing with said pinion and driving the line-spacing element of the machine, a lever for regulating said pawl-arm and having a leaf mounted thereon, and provided with a tooth to engage notches in said table, a spring for said leaf and tooth, and a finger-piece for said regulating lever.

51. The combination of a typewriter-element to be line-spaced, a line-space wheel having minute teeth, movement-reducing gearing to enable said line-space wheel to drive said element, a normally released pawl for driving said line-space wheel, an over throw-preventing stop for said pawl, a linespace regulator connected to control said pawl and adjustable to different set stations to predet-ermine the number of line-spacing units composing each stroke, and independently adjustable means co-operating with said pawl for varying the measurement of the line-spacing unit.

52. The combination of a line-space driver, a line-space wheel, a pawl for said wheel, a line-space regulator including a lever having a 'minutely-variable fulcrum, means enabling said regulator-lever to control said pawl, means independently settable for determining the number of units of space through which said driver line-spaces the work-sheet, and a stationary stop for arresting said pawl and preventing overthrow of the line-space wheel, said line-space pawl being arrested by said stationary stop at all adjustments of said fulcrum.

53. The combination of a line-space driver, a line-space wheel, a pawl for said wheel, a line-space regulator including a lever having a minutely-variable fulcrum, means enabling said regulator-lever to control said pawl, means independently settable for determining the number of units of space through which said driver line-spaces the work-sheet, and a stationary stop for arresting said pawl and preventing overthrow of the line-space wheel said line-space pawl, being arrested by said stationary stop at all adjustments of said fulcrum, said lever having a longitudinal slot along which said fulcrum is adjustable, and said slot being soformed that when the lever is arrested by said stop, the direction of its said slot is coincident with the direction of trol said clutch, and adjustable means for releasing the driving clutch from said wheel.

55. The combination with a line-space wheel having minuteteeth, of a line-spacing drive-train, a line-space-regulator lever for said line-spacing train, a regulator-arm connected thereto, said arm pivoted concentrically with said wheel and having means for controlling the connection of said drivetrain with said wheel, a device for minutely varying the leverage of said regulator-lever,

and means to detain said regulator-lever selectively at different set stations.

56. The combination with a line-space wheel having minute teeth, of a line-spacing drive-train, a line-space-regulator lever for said line-spacing train, a regulator-arm connected thereto, said arm pivoted concentrically with said wheel and having means for controlling the connection of said drive-train with said wheel, a device for minutely varying the leverage of said regulator-lever, means to detain said regulator-lever selectively at different set stations, and an overthrow-preventing stop to arrest said driving train at the same position for driving strokes of all extents.

57. In a line-spacingmechanism, the combination of a line-spacing wheel having minute teeth, a lever, a movement-multiplying arm for said lever, the latter having a driving clutch for said line-space wheel, a line-space-regulator lever having a fulcrum, means for adjusting said fulcrum to different positions lengthwise of the regulator-lever, the latter having a slot for the fulcrum,

a slide carrying said fulcrum, means for guldmg said slide, and ad ustable means for releasingthe clutch from sald wheel.

loo

58. In a line-spacing mechanism, the combination of a line-spacing wheel having minute teeth, a line-space lever, a movementmultiplying arm for said line-space lever, the latter having a driving clutch for said linespace wheel, a line-space-regulator lever having a fulcrum, said fulcrum being made adjustable to different positions lengthwise of the lever, the lever having a slot for the fulcrum, a slide carrying said fulcrum, means for guiding said slide, and independent means, including a rack and a member adjustable along said rack, for selectively determining the length of stroke of the linespace lever.

59. The combination of a line-space wheel, a line-space lever, a wheel-driving clutch, and a driver for said clutch, said driver operated by said lever, a regulator-lever, having connected thereto an arm, the latter having means for releasing said clutch from said wheel, said regulating lever having an adjustable fulcrum, means whereby the adjustment of said fulcrum is made effective to vary the eii ective point of the clutch-releaser, said regulator-train being also adjustable to different set stations independently of the adjustment of said fulcrum, and means whereby the selective setting of said regulator train is also made effective to regulate the efiective point or said clutch-releasing means.

.60. In a line-spacing mechanism for a typewriting machine having a revoluble platen, the combination of a line-space lever, a movementanultiplying arm to 'which said line-space lever is connected, a pawl driven by said movement-multiplying arm, a linespace wheel having teeth of minute pitch engageable by said pawl, the connection being such that said pawl, together with said linespace wheel, is vibrated through a far greater angular extent than said line-space lever, movement-reducing gearing between said line-space wheel and said revoluble platen, an adjust-able regulating train having means for controlling the engagement of said pawl with said line-space wheel, said regulating train including a lever and means for adjusting its leverage for eiiiecting minute variations in the length of the line-spacing unit, and a device having a set of stations to which said lever may also be set according to the number of units to be included in the linespacing stroke of the platen.

61. Machine according to claim 60, in which an overthrow stop is co-operative with said pawl at the conclusion of every drive-stroke of the linespace lever.

62. In a line-spacing mechanism for a typewriting machine having a revoluble platen, the combination of a line-space lever, a movement-multiplying arm to which said linespace lever is connected, a pawl driven by said 1noveinent-multiplying arm, a line-space wheel having teeth of minute pitch engageable by said pawl, the connection being such that said pawl, together with said line-space wheel, is vibrated through a far greater angular extent than said line-space lever, movement-reducing gearing between said linespace wheel, and said revoluble platen, an adjustable regulating train having means for controlling the engagement of said pawl with said line-space wheel, said regulating train including a lever, adjustable means co-operative with said regulating lever for varying its that said )awl to ether with saidline-s ace wheel, is vibrated through a far greater an gular extent than said line-space lever,-movement-reducing gearing between said linespace wheel and said revoluble platen, an adjustable regulating trainhaving means for controlling the engagement of said pawl with said line-space wheel, said regulating train including a lever, adjustable meansco-operative with said regulating lever for varying its leverage, said pawl having a projection,

and a releasing cam in the path of said pro-v jection, said cam being settable by said regulating lever to vary the length of the linespacing movement, by a leverage-changing movement of said regulating lever to vary the extent of the line-spacing unit, and being. also settable by a swing of said lever to regulate the number of units included in the line-spacing movement of the platen.

64. The combination of a line-space Wheel provided with an arbor and having a multitude of minute teeth, a line-spacing train including a line-space lever and a wheel-driving pawl, a line-space-regulator train which includes a regulator-lever fulorumed eccentrically of said arbor and having pivoted thereto a regulator-arm, the latter having means for releasing said pawl from said wheel, a device for minutely adjusting the fulcrum of said regulator-lever, a rack, and means to detain said regulator-lever selectively at different points in said rack.

65. The combination of a line-space wheel having a multitude of minute teeth, a linespacing train including a line-space lever and a wheel-driving pawl, a linespace-regulator train which includes a regulator-lever fulcrumed eccentrically of said line-space wheel and having pivoted thereto a regulator-arm, the latter having means for releasing said pawl from said wheel upon the return stroke of the line-space lever, a device for varying the leverage ofsaid regulator-lever, a rack, means to detain said regulator-lever selectively at different points in said rack, and a single stop to arrest said line-space lever at the same position for driving strokes of all extents, said stop eilective to prevent overthrow of said line-space wheel.

66. The combination with a line-space wheel having an arbor, of a line-space lever,

a clutch for enabling it to drive said linespace Wheel, a stop to arrest the driving stroke of the line-space lever, a line-space-regulator train including a lever fulcrumed eccentrical- 1y of the line-space Wheel, and means pivoted to said regulator-lever to release said clutch from said wheel, said releasing means being mounted concentrically with said line-space wheel, a fixed shaft upon which said arbor is journaled, said releasing means being pivoted upon said shaft, a pivot connecting the regulator-lever with said releasing means, and a locating rack to co-operate with said regulator-lever to retain it selectively at predetermined locations, said regulator-lever having an adjustable fulcrum.

67 In a line-space mechanism for a typewriting machine, the combination of a linespace wheel, a line-spacing train including both a lever and a movement-multiplying arm driven thereby, the arm being mounted to rotate coaxially with said line-space wheel, a clutch operated by said arm, a line-spaceregulating train including a lever and a releasing device for said clutch, said releasing device pivoted coaxially with said wheel, and pivoted to said regulating lever, and means for varying the leverage of said regulating lever upon said releasing device, by adjusting the fulcrum of said regulating lever.

BURNHAM C. STICKNEY.