US739622A - Type-writing machine. - Google Patents

Description

PATENTED 331 1222, 1903'.

B.- a. mommy. TYPE WRITING MAGHIN a APP LIGATION FILED IDES 18, 1901.

N0 MODEL.

4 SHEETS-SHEET 1.

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PATENTED SEPT. 22, 19503.

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Y!" m' H F 0) I grid WITNESSES FWD INVENTEIR @MMM? No. 739,622. PATENTED SEPT. 22, 1903.

B. c. STIGKNEY'.

TYPE WRITING MACHINE. APPLICATION FILBD DBO; 18,1901.

no MODEL 4 SHEETS-SHEET 4.

WITNESSES I NVENTIII R UNITED STATES reamed September 22, 1903.

BURNHAM o. STICKNEY, on ELIZABETH, NEW JERSEY, nssienon TO UNION TYPEWRITER COMPANY, or JERSEY CITY, NEW JERsEY, A CORPORATION on NEW JERSEY.

TYPE-WRlTiNG MACHINE.

srEGIFIGATION forming partof Letters Patent No. 739,622, dated September 22, 1903. Application filed December 18, 1901. Serial No. 86,461- (No model.)

of the city of Elizabeth, county of Union, and

- provide simple means for enabling the touch' State of New Jersey, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification. This invention relates generally to writingmachine type-actions,and particularly tothose i in which type-bars strike the front side of a platen.

The principal object of the invention is to of the keys to be adjusted through a wide range from very light to very heavy, so as to suit difierent operators. I preferably connect the keys to the type-bars by link motions in such a manner that by slightly changing the relative positions of the connecting members the touch of the keys may be made either easier or harder. Although I employ levers for transmitting movement from the keys to the type-bars, still I do not alter the leverage of any lever-that is, I do not change the various positions .of its own working points with relation to one another. I preferably mount said levers upon pivots, securing easy and positive action without possibility of derangement. V

In carrying out my invention in thisinstance I also contrive by means of said connections to lock the type-bars in normal position, so as to prevent their rebound from the typebasket after rapid operation, and I further cushion the key-stroke, so that at all times the initial portion of the stroke is rendered comparatively easy, thus avoiding jar to the finger of the operator, While the key resistance gradually increases during the downstroke, thus gradually absorbing the momentum of the operators' hand and preventing jar thereto at the termination of the stroke, while simul-' taneously speeding the type-bar so that it is caused to deliver a powerful blow upon the platen or the paper thereon, while the first part of the return movement of the type-bar is made at high speed, thereby avoiding liability of clashing with the next operated typebar.

riage 4:, having a platen 5.

ing adjusted so as to give a relatively hard touch to the keys. Fig. 2 is a skeleton view of the type-action shown at l, but showing an adjustment whereby an easy touch of the keys is secured. Fig. 3 is a sectional plan of a universal bar and connections for operating carriage-feed dogs. Fig.4 is a sectional view showing a plan of the key levers. Fig. 5 is a sectional elevation illustrating the necting them to the type-bars.

In the several views similar parts are designated by similar numerals of reference.

The frame of the machine may consist of an open base 1, supporting, 'by means of posts 2, a top plate 3, over which may run a car- Below the platen is mounted in'a segment 6 a series of typebars 7, pivoted upon a curved fulcrum-wire 8 and working in radial slots 6 in the-segment,

the type-bars extending forwardly from the latter and striking upwardly and rearwardly. against the platen. Type-operating keys 9 at the front of the machine are mounted upon 13 operate rearwardly-direeted arms 14 of a series of bell-cranks that are pivoted upon a transverse horizontal fulcrum rod 15, upwardly-directed arms 16 of these bell-cranks being directly connected by forwardly extending links 17 to the type-bars 7. 1

In operation a key 9 is depressed, vibrating the lever 10 and swinging'forwardly the arm 12 thereof, which through the link 13 pulls down thearm 14: of the intermediate bellcrank, thereby vibrating arm 16 of the latter rearwardly and through the link 17 swinging the type-bar up to print. Upon relief of the key from pressure the parts are returned to normal position by a draw spring 18,

caught at one end in the arm 12 and extend- 100 manner of mounting the key-levers and coning back to a rod 19, crossing the basein position to carry the entire set of springs. Normally the link-pivot on the sublever or bell-crank 14 16, the link-pivot 21 on the keylever, and fulcrum 11 of the latter are nearly in line, so that arm 12 and link 13 act as a locking-toggle for detaining the type-bar in normal position, being aided by the spring 18, which tends to maintain the toggle closed or straight, so that the type-bar is prevented from rebounding from the basket, and hence cannot clash with other types, thus permitting the machine to be operated at high speed. Moreover, owing to the toggle relation of link 13 and arm 12 the type bar is started in motion very gradually, so that the resistance of the key at the beginning of the stroke is very little and jar to the finger is avoided. It will be observed that by the time the key has made half a stroke, as at 9, the type-bar has made only about one-third of a stroke, as at 7 Fig. 1, the speed of the type-bar being relatively slow at first-and increasing constantly throughout the stroke, so that at the terminal portion thereof it is moving very fast and delivers a powerful blow. The tendency of the key,.on the contrary, is to move at relatively decreasing speed, and hence to come gradually to rest or to offer graduallyincreasing resistance to the finger, thereby absorbing momentum from the operators hand and avoiding shock to the finger at the termination of the stroke.

The f ulcrum-rod 15 of the sublevers or bellcranks is mounted at its ends upon a pair of arms 22, fixed by hubs 23 upon a transverse horizontal rockshaft 241, from which said arms extend upwardly and rearwardly, said rock-shaft being journaled in ears 25 on the base 1. The arms 22, which are rigid with each other, may swing the fulcrum-rod 15 about the axis 24, and thereby cause the entire set of sublevers 14 16 to change their positions bodily in the machine. Said arms 22 may be adjusted to different positions by means of a worm or screw 26, meshing with a segment of a worm-wheel 2'7, fixed upon the rockshaft 24, said worm being'operated by means of a shaft 28, extending forwardly to the keyboard and provided at its front end with a finger piece or wheel 29, said shaft being journaled near its ends in lugs 30 and 31, the former having a pin at 32 for engaging a groove cut in the shaft 28 to prevent endwise displacement of the latter.

By manipulating the finger-wheel 29 so as to adjust the sublever fulcrum-rod 15 from the position shown in full lines to that indicated by the dotted circle at 15, Fig. 1, the sublevers may be swung or tipped bodily and caused to assume the position shown at 16, Fig; 2, the links 13 being thus brought substantially in line with the arms 12, as at 13. WVhen the links are in this initial position, the operation is substantially the same as already described, except that the type-bar is moved much more slowly from normal position as compared with the speed ofthe key and does not acquire speed so early in the key-stroke, the effect of the change being to render the key-touch softer than when the parts arein the normal position (shown at Fig. l) and better adapted to operators having a light finger-touch. At Fig. 2 the key is shown as'half way depressed at 9 while at 7 the type-bar is shown as having been moved even less than the distance indicated at 7, Fig. 1. Operators who prefer a very soft key-stroke can obtain the same by adjusting the parts to the Fig. 2 position without impairing the rapidity of action of the type-bar or its promptness in responding to the touch, while those who prefer more key resistance can obtain the same by an adjustment to the Fig. 1 position. In either case, as will be understood, both the initial portion and the terminal portion of the key-stroke, are cushioned, and the type-bar is caused to strike hard. It will be understood also that fine intermediate adjustments'may be effected, sothat the machine may be adapted to satisfy every shade of taste on the part of different operators.

The links 17 may be parallel, the intermediate levers 14 16 may workin vertical parallel planes, and the Width of the system of sublevers may be substantially equal to that of the system of levers l2,the latter being preferably also vertical, as seen at Fig. 5. The forwardly-extending portions 10 of the keylevers may fan out from their rear to their forward or key-bearing portions, as seen at Fig. 1. The key-levers may be fulcrumed at different heights in four tiers of hangers 33, secured in'staggering arrangement upon the front face of a transverse bar 351, so as to compensate for the differences in the lengths of the levers 10 due to the arrangement of the keys in four rows or banks, the levers extending to the front bank being mounted upon the lowermost hangers 33, and hence having the longest arms 12, the levers in the next set or bank being fulcrumed upon the next higher that the upright arms 16 of the sublevers are made of graduated heights, the shortestbeing in the middle of the system and the height increasing by progression until the sides of the system are reached, so that the upper ends of said arms may lie directly in rear of their respective type-bars and the links 17 Work in substantially horizontal direction. Since the movement of the type-bars and links 17 is uniform for all the type-bars, the difference in the lengths of the arms 16 necessitates difierent angular vibration of the several sub-' versbeing of substantiallyuniformlength,the

difference in the vibrations thereof may be compensated by making the upper ends of the arms 12 terminate at different heights, sothat said ends lie in an'arc, as seen 'at Fig. 5,1

the arms 12 being highest in the middle of the system and becoming gradually shorter until the sides of the system are reached. The

' links 13 vary. accordingly inlength, and owing to this difierence in the lengths of said links andthe height of the arms 12 the difference in the vibration-angles of the'sublevers is made up and a substantially uniform depthof stroke all overthe keyboard may be se-- cured. r The'forward portions of the key-levers may work in a slotted guide and rest against a pad 36, While the upper ends of the arms 12 may Work in a comb 37-, carried by brackets .38, secured to opposite sides of the base 1.

Thus it will be seen that all parts of the typeaction may work smoothly and freely, particularly since all of the joints are pivotal, While owing to their positive connection an accuracy of action is secured, and one spring, as, 18, for each key may return all of the parts of the type-action to normal position, thus avoiding objections to the use of several returning-springs for each key and each typebar.

or types, and also Without disturbing the relation of said connecting parts to their sup-:

ports, and also the first in such a system to normal position and also cushioning the keystrokes by means of said adjustable connections. f

The paper carriage a may be propelled by suitable means and controlled by spacingdogs 39 and i0, carried by a rocker aland having a returning-spring 42 and mounted upon a rock-shaft 43, journaled in hangers 44, depending from the top plate, FigsJl Upon one end of the rock-shaft mayand 3. be fixed a depending arm 45, to the lower end of which is pivoted the rear end of a bar 46 of aframe, the latter also comprising an opposite short bar or arm 47 and a transverse bar 48, said arms and transverse bar being made of one strip of metal and the arms being pivoted at points near said transverse bar to the lovver ends of a pair of idle links 49, depending from a rock-shaft 50, pivoted in portions 51 of the top plate, said links being fixed upon said shaft, so as to move in unison with the dog-operating arm 45. Uponthe for- I believe that I am the first to produce an, unbroken connection from the key to the tered by shifting aset of connecting parts: bodily Without disconnection from either keys provide for both locking the type-bars in' ward side of the transverse member 48 of the parallel'motion frame 'Isecure by screws 52 a'u'niversal bar 53, curved to follow the typebar system and operable by lugs 54, formed upon the hub portions of the type-bars, so

universal baris driven back, thus vibrating the dog-rockenFig. 1, the dogs and universal bar being returned to normal position by the spring i2 and permitting the carriage to advance one step. The carriage feeding movements may be otherwise controlled by the keys. It will be seen that I combine a set of typebars, a set of keys, a set of devices positively .connecting said keys to said type-bars, and a of said set of keys'and said set of connecting devices Without, however, disconnecting the devices may be regarded as consisting in this instance of the bell-cranks 14 16, taken in connection with the links 13 and 17, said bellcranks being moved bodily, so as to vary their effective relation to the key-levers, but of .course other connections may be used without departing from the spirit of this part of my invention. As will be seen at Fig. 1, the fulcrums of the said bell cranks or sublevers may be shifted away from or toward the loadpoints 21 of the key-levers, so as to increase said sublevers, such purchase of course. being greatest when the fulcrum-rod is most re-' mote from said load-points, as at 15*; By .swingingthe links 13 from the normal position .they are more nearly in'line with the arms 12, the effective relation of the arms 12 and 14 is changed, the former being given a greater purchase upon the latter, so that a greater same extent of movement of thetype-bar,

and the touch is consequently altered.

The parts 10,12,13,14,l6,17, and '7, taken together, constitute a linkage or link-motion between the key 9 and the type 7,and the position of onememberof said link-motion orlinkage in this instance 1% 16-may be changed at will by the finger-piece 29, which is connected to said member, so as to vary the resistance offered by the type to actuation by the key, and other forms of link-motions maybe employed Within the scope of my present improvements. In this instance theload-point .21- of the key-lever 12 moves longitudinally of the type-operating arm 14, to which it is connected by the link 13, and dnrin g the printing stroke approaches the fulcrum 15 of said arm 1%, said link normally lying, in adirection longitudinally of saidjkeylever '12. It will be seen 'thatthe lever 14: 16 may be tipped to different positions, While the typebar and key are stationary. ,7 Avaluable feature included in my improvements is that the purchase, of the keysupo'n the type-bars is automaticallydiminished keys from the type -bars. Such connecting or diminish the purchase of the latter upon that when the latter are swung up to print the finger-piece for varying the relative positions IOC at Fig. 1, to the normal position atFig. 2,where movement of the key is required to effect the during the downstrokes of the keys at all adjustments of the sublevers, since the upright levers 12 and the links 13, directed upward therefrom and crosswise of the arms 14:,in all casesoperate as toggles, giving avery easy start to the type-bars.

12 lock the arm 14, so that the latter cannot be operated by the type-bar, and that at all adjustments of the sublevers not only is the type-bar thus locked, but also the purchase of the key upon the type-bar is automatically diminished during the printing stroke, While the types when receding from the printing point move at high speed as compared with tion independently of said key and said type,

and thereby cause variation in the resistance of the key to the finger-touch.

2. In a'type-Writing machine, the combination with a set of type-bars and a set of keys, of a set of levers operated by said keys, a set of devices positively connecting said levers to said type-bars, and means for varying the relative positions of said set of levers and said set of connecting devices to vary the resistance offered to the actuation of the keys.

In a type-Writing machine, the combination with a series of type-bars and a series of keys, of a set of levers operated by said keys, aset of devices connecting said levers to said type-bars, and means for adjusting said set of devices to different positions While connected to said type-bars and to said key-levers to vary the resistance offered to the actuation of thekeys.

4. In a type-writing machine, the combination with a series of type-bars and a series of keys, of a set of levers operated by said keys, a set of levers connecting said key-levers to said type-bars, and means for adjusting one of said sets of levers bodily to different positions so as to vary its effective relation to the other set of levers and thus vary the resistance offered to the actuation of the keys.

5. In a type-Writing machine, the combination with a series of type-bars and a series of keys, of a set of levers operated by said keys, a set of sublevers connected to said key-operated levers and to said type-bars, and means for shifting said sublevers bodily so as to vary their effective relation-to said key-operated levers and thus vary the resistance offered to the actuation of the keys.

6. In a type-writing machine, the combination with a series of type-bars and a series of keys, of a set of levers operated by said keys,

It will also be'noted that in normal position the link 13 and arm wag-62:2

a set of sublevers connected to said key-open ated levers and to'said type-bars, and means for shifting the fulcrums of said sublevers toward and away from the load-points of said key-operated levers to vary the resistance offered tothe actuation of the keys.

7. In a type-writing machine, the combination with a series of type-bars and a series of keys, of a set of levers operated by'said keys, a set of sublevers, a set of links directly connecting said sublevers to said type-bars, and means for shiftingone set of said levers bodily with reference to the other set to vary the resistance offered to the actuation of the keys.

S. In a type-Writing machine, the combination with a series of type-bars and a series of keys, of a set of levers operated by said keys,

a set of sublevers, a set of links directly connecting said sublevers to said key-levers, a

set of links directlyconnecting said sublevers to said type-bars, and means for shifting said sublevers bodily With reference to the load-points of said key-levers to vary the resistance offered to the actuation of the keys.

9. In a type-Writing machine, the combination of a set of types, a set of type-operating lever-arms operatively, connected thereto, a

set of key-operated levers positively connected to said lever-arms, and means for varying the relative positions of said set of leverarms and said set of levers, so as to change their effective relation, and vary the resistance offered to the actuation of the key-operated levers. 10. In a type-Writing machine, the combination of a set of types, a set of type-operating lever-arms operatively connected thereto, a set of key-operated levers, aset of links connecting said lever arms to said levers, and means for varying the relative positions of said set of lever-arms and said set of levers so as to swing said set of links and change the effective relation of said arms to said levers, in order to vary the resistance offered to the actuation of the key-operated levers.

11. Ina type-Writing machine, the combination of a key, a type, a link-motion connecting said key to said type, and means for changing the position of a member of said link-motion at'will so as to vary the resistance of the key to the finger-touch.

12. In a type-writing machine, the combination of a key-lever, a type-bar, a sublever having an arm so mounted that the loadpoint of said key-lever moves longitudinally of said arm, a link connecting said key-lever to said arm, and means for moving said sublever bodily to different positions relatively to said key-lever.

13. In a type-Writing machine, the combination of a key-lever, a type -bar, a sublever connected to said type-bar, and so mounted that the load-point of said key-lever moves during the printing-stroke longitudinally of an arm of said sublever and approaches the fulcrum thereof, a link connecting said loadpoint to said sublever, said link normally lying in a direction longitudinal of that "portion of said key-lever to Which the line is connected, and means for moving said subl'ever bodily to different positions independently of said key-lever.

14. In a type-Writing machine, the combination of a set of type-bars, a set of key-levers,

a set of links pivoted to the load-points of said levers and operatively connected to the H type-bars and enabling the key-levers to opcrate said type-bars, and means for varying the relative positions of said set of levers and said set'of links in such a manner as to alter the resistance of the keysto the touch,

15. In atype-Writing machine, the combination of a set of type-bars, a set of key-levers, a set of links pivoted to the load-points of said levers and operatively connected to the V type-bars and enabling thekey-levers to operatesaid type-bars, and means for varying the position of said set of links While said set of levers remains stationary in order to vary the resistance offered to the actuation of the key-levers. k I

16. In a type-Writingmachine, the combination of a type-bar, a key-lever, an intermediate lever, a device upon which said intermediate lever is fulcrumed, and means for adjusting said fulcrum device and intermediate le- "ver hile said type-bar andkey-lever remain stationary; p

117. In a type-writin g machine,the combination of a type-bar, a key-lever, an intermediate lever, a fulcrum upon which said intermediate lever is pivoted, and means for adjusting said fulcrum toward and away from the load-point of said key-lever to vary the resistance offered to the actuation of the key-lever. 4O

18. In a typeriting machine, the combination of a type-bar, a key-lever, an intermediate lever, a link connecting said key-lever to said intermediate IBVGLR fulcrum for said intermediate lever, and means for'moying said fulcrum toward and away irom the load-point of said key-lever to varythe resistance oflfered to the actuation of said key-lever. I

19. In a type-Writin g machine, the combination of a type-bar, a key-lever, an intermediate lever, and means for moving said intermediate lever bodily to difierent initial positions in a manner to vary the purchase of the key-lever upon the type-bar.

20. In atype-writin g machine,the combina tion of a key, a type-bar, alever, a fulcrum for said lever, and means for adjusting said 'fulcrum and said lever simultaneously so as to vary the purchase of said key upon said type-bar.

21. In a type-Writing machine, the combina-- tion of a type-bar, a key, a lever connected to both said type-bar and said key, and means for tipping the lever to different positions while the typebar and key are stationary.

22. In a type-Writing machine, the combinano of a type-bar, a key, a connecting device,

and means for adjusting said connecting device bodily to diiferent normalpositiousso as to vary the purchase of said key upon said type-bar. g v

23. In a type-Writing machine, the combination with a series of type-bars and a series of keys, of means for connecting the keys to the type-bars so thatthe purchase of the keys said set of connecting devices.

24. In a type-Writin g machine,the combination with a series of type-bars and a series of keys, of a set of levers operated by said keys; a set of devices positively connecting said levers to said keys; and means for adjusting said set of connecting devices to differentpositions; said connecting devices being op'erative at all such adjustments to antomatically diminish the purchase of the keys upon the type-bars during the downstrokes of the keys; and saidadjusting means being effective for varying the resistance of the keys to the touch. s

25. In a type-writing machine, the combination with a type-bar and a key of means for automatically diminishing the purchase of the key upon the typebar during the printing stroke of the latter; said means including a connection which is mounted for bodily movement independently of said key and saidtype-bar, and said bodily movement being effective to vary the resistance of the key to the finger-touch.

26. In a type vvriting machine,the combina tionwith a series of type-bars and a series of keys, of a set oflevers operated by said keys; a set of levers for connecting said keyleve rs to said type-bars; said sets of levers being positively connected, and being mounted in such a manner that the purchase of the keys upon the type-bars is automatically di- -m inished during the dovvfnstrokes of the keys; and means for adjusting one of said sets of levers bodily to different positions so as to vary its operative relation to'theother set of levers.

27. In a type-Writing machine,the combination with a series of type-bars and a series of keys, of a set of levers operated by said keys; a set of sublevers connected by links to said key-levers and operating jsaid typebars; said key-levers together with said links forming a set of toggles; and means for shifting said set of suhlevers bodily so as to, vary the normal positions of said -links. X

28. In atype-Writing machine, the combination of a set of type-operating lever-afrmsra set of key-operated levers; a set of links connecting said lever arms toisaid levers; said levers being so mounted that their loadpoints move longitudinally of said arms; and means for varying the relative positions of said set of arms and said set of levers.

29. In a type-writing machine,the combina tion with a series of rearwardly-striking typebars of a series of upright levers; keys for operating said levers; a series of bell-cranks having upright arms connected to said typebars and connected by their other arms to said upright key-operated levers by means of a series of links, each link normally standing longitudinally of its key-lever and crosswise of its bell-crank arm; and means for shifting said bell-cranks.

30. In a type-Writing machine,the combination of a series of rearwardly-striking typebars; a series of keys; a series of levers ex- 7 tending rearwardly from said keys and fulcrumed at their rear portions; upwardlyextending arms upon said key-levers; links extending upwardly from said arms; bell-cranks having rearWardly-extending arms to which said links are attached, and also having upwardly-directed arms; links extending for- Wardly from said upwardly directed bellcrank: arms to said type'bars; and means for shifting said bell-cranks independently of said keys and said type-bars.

31. In a type-Writing machine, a series of keys and a series of type-bars; devices connecting the keys to the type-bars and effective to lock the type-bars in normal position, so

that each type-bar is unlocked and operated by its key; said connecting devices including aset of levers operated by said keys; and also including devices intermediate said levers and said type bars; in combination with means for varying the positions of said intermediate devices bodily independently of said keys and type-bars, so as to vary the purchase of the keys upon the type-bars.

32. In a type-Writing machine,the combination With a series of keys and a series of typebars of a series of levers operated by said ,keys; a series of sublevers connected to said type-bars; devices connecting said levers to said sublevers and effective to lock said sublevers and type-bars in normal position; and means for shifting said sublevers bodily independently of said type-bars and said keylevers.

33. In a type-writing machine, a series of keys; a series of type-bars; devices connecting the keys to the type-bars and locking the latter in normal position, so that each typebar is unlocked and operated by its key; said connecting devices including a set of levers operated by said keys and also including devices intermediate said levers and said typebars; in combination with means for varying the positions of said intermediate devices bodily independently of said keys and typebars, so as to vary the purchase of the keys upon the type-bars; said connecting devices between the keys and type-bars being effective at all such adjustments to diminish automatically thepurchase of the keys upon the type-bars during the printing strokes.

34. In a type-Writin g machine, the combination with a series of keys and a series of typebars of a series of levers operated by said keys; a series of sublevers connected to said type-bars; devices connecting said levers to said sublevers and effective to lock said sublevers and said type-barsin normal position; and means for shifting said sublevers bodily independently of said type-bars and keylevers; said key-levers, sublevers and their connecting devices being so mounted that at all adjustments of said sublevers the purchase of the keys upon the type-bars is automatically diminished during the printing strokes.

35. In a type-Writing machine,the combination With a series of type-bars and a series of keys of means for varying at Will the purchase of all of said keys simultaneously upon said type-bars said means including a series of levers connected to the type-bars and keys, a rod Whereon said levers are pivoted, and a device for adjusting said rod and said levers.

36. In a type-Writing machine,the combination of a series of type-bars; va series of keylevers; a series of sublevers; a rod Whereon said subley ers are fulcrumed links connecting said sublevers to said key-levers; links connecting said sublevers to said type-bars; and means for moving said rod and sublevers to different positions independently of said key-levers and said type-bars.

37. In a type-Writing machine, the combination of a series of type-bars; a series of keys; a series of levers connected to said keys and type-bars; a rod upon Which said levers are pivoted; a movable device Whereon said rod is mounted; and a Worm or screw for effecting adjustment ,of said movable device, said fulcrum-rod and said levers independently of said type-bars.

38. In a type-writing'machine, the combination of a series of type-bars; a series of keyoperated levers; a series of sublevers; a rod Whereon one of said series of levers is mounted; arms Whereon said rod is carried; and

.means for rocking said arms so as to shift .said rod and the levers thereon, and thus vary .the resistance offered to the actuation of said key-operated levers.

39. In a front-strike writing-machine, the combination of a series of rearWardly-striking type-bars; a series of key-levers; a series of sublevers; a series of links connecting said key-levers to said sublevers; a series of links connecting said sublevers to said type-bars;

a rod Whereon said sublevers are mounted;

rocker-arms Whereon said rod is carried; and means for adjusting said rocker-arms and rod so as to vary the position of said sublevers, and thus vary the resistance offered to the actuation of said key-levers.

40. In a front-strike writing-machine, the

combination of a series of rearWardly-striking type-bars; a series of key-levers; a series of ICC sublevers; a series of links connecting said key-levers to said sublevers; a series of links connecting said sublevers to said type-bars; a rod whereon said sublevers are mounted; rocker-arms whereon said rod is carried; a shaft whereon said arms are mounted; a worm-wheel connected to said rocker-arms; a Worm engaging said Worm-wheel; and a finger-piece for turning said worm.

41. In a front-strike writing-machine, the combination of a series of rearwardly striking type bars; a series of bell-cranks; keys. carried by said bell-cranks; a second series of bell-cranks; links connecting the two series of bell-cranks; links connecting said second series of bell-cranks to said type-bars; a rod whereon said second series of bell-cranks is pivoted; and means for swinging said rod and the bell-eranks-thereon. 1

42. In a front-strike writing-machine, the combination of a series of key-bearing bellcranks having arms converging rearwardly from the keyboard and fulcrumed at difierent heights, and also having at their rear portions substantially parallel upright arms substantially parallel links extending upwardly from said upright arms, the latter being of graduated lengths, the arms at the middle of the system being longest and growing shorter by progression toward the sides of the system, and the links being also of graduated lengths, being shortest at the middle of the system and growing longer by progression toward the sides of the system; a second set of substantially parallel bell-cranks having rearwardlyextending arms to-Which said links at their upper ends are pivoted, and also having upwardly-extending arms of graduated lengths,

' the arms at the middle of the system being shortest and becoming gradually longer as the-sides of the-system are approached; sub stantially parallel forwardly-extending links pivoted to said upright arms; a system of rea rwardlystriking type-bars mounted upon a segment; said links being attached at their forward ends to said type-bars; a rod Whereon said second set ofbell-cranks is fulcrumed;

arms supporting said rod at its ends; a rockshaft carrying said arms; and means for rockmg said arms.

43. In atype-writing machine, the combina .tion of a system of type-bars; a system of keybearing bell-cranks comprising rearwardlyextending arms and upwardly-extending arms; devices connecting said upwardly-extending arms to said type-bars and causing the purchase of said arms upon said typebars-to diminish automatically during the printing strokes of the keys; and means for shifting said set of connecting devices so as .to vary the purchase of said arms upon said type-bars.

44. In atype-writing machine,the combination of a system of type-bars; a system of key- ,bearing bell-cranks comprising rearwardlyextending arms and upwardlyextending.

arms; devices connecting said upwardly-extending arms to said type-bars so as vto lock thelatter in normal position; and means for shifting said set of connecting devices so as to vary the purchase of said arms upon. said type-bars.

4-5. In a type-writing-machine, the combination of a system of type-bars; a system of keybearing bell-cranks comprising arms extending rearwardly beneath the type-bars and also upwardly-extending arms; devices, including a set of sublevers, for connecting said upwardly-extending arms to said type-bars so asto lock the latter in normal position and also effective to diminish automatically the purchase of said upwardlyextendingarms upon said type bars during their printing.

strokes and means for shifting said sublevers so as to vary the purchase of said upwardlyextending arms thereon.

46. In a front-strike Writing-machine, the combination of a system of rearwardlyestriking type-bars; a set of keyoperated bellcranks extending rearwardly beneath the type-bars and upwardly at their rear portions; a set of sublevers fulcrumed near the loadpoints of said bell-cranks and having arms extending rearwardly over said load-points; links extending upwardly from said loadpoints to said arms; links connecting saidsub- -levers to said type-bars; and means for efEecting a relative movement of the set of keybearing bell-cranks and the set of sublevers so as to alter the distance between said loadpoints and the fulcrums of said sublevers.

d7, In a-type-writing machine, the combination of a key-bearing bell-crank, atype-bar, asublev'er having an arm so mounted that the load-point of said bell-crank moves longitudinally-of said arm, and a link connecting said load-point to said sublever-arm.

48. In atype-Writing machine, the'combh nation of a key-bearin g bell-crank, a type-bar, a sublever connected tosaid type-bar and so mounted that the load-point of said bell-crank -1noves during the printing stroke longitudinally ofan arm of said sublever and appreaches the fulcrum'thereof, and a link connecting said load-point to said subleverg'said link normally lying in a direction longitudi- 49. In a type-writing machine, the combination with a series of type-bars and a' series of keys, of a set of bell-cranks operated by .said keys; and a set of; subleversconnected by links to said bell-cranks and operating said type-bars said bell-cranks together withsaid links forming a set of toggles, which look the type-bars against rebound when returned to the normal positions. i

50. In a type-Writing machine the combination with a series of rearwardly-striking type bars of a series of upright levers; keys for operating said levers; and a series of bell- .cranks having upright arms connected to said type-bars and connected by their other arms to said upright key-operated levers by means I of a series of links, each link normally stand- .nal of one arm of saidkey-bearing bell-crank.

' I nation of a series of rearwardl y-strikin g typebars; a series of keys; a series of leversextending rearwardly from said keys and fulcrumed at their rear portions; upwardly-extending arms upon said key-levers; links extendln g upwardly from said arms; bell-cranks havin rearwardl -extending arms to which a d c said links are attached, and also having upwardly-directed arms; and links extending forwardly from said upwardly-directed bellcrank arms to said type-bars.

52. In a front-strike writing-machine, the combination of a series of key-bearing bellcranks having arms converging rearwardly from the keyboard and f u lcrumed at different heights, and also having at their rear portions.

substantially parallel upright arms; substantially parallel links extending upwardly from said upright arms, the latter being .of graduated lengths, the arms at the middle of the system being longest and growing shorter by progression toward the sides of the system, and the links being also of graduated lengths, being shortest at the middle of the system and growing longer by progression toward the sides of the system; a second set of substantially parallel bell-cranks having rearwardlyextending arms to which said links at their upper ends are pivoted, and also having upwardly-extending arms of graduated lengths, the arms at the middle of the system being shortest and becoming longer by progression as the sides of the system are approached; substantially parallel forwardly-extending links pivoted to said upright arms; and a system of rearwardly-striking type-bars mounted upon a segment; said links being attached at their forward ends to said type-bars.

53. In a front-strike writing-machine, the combination of a series of key-bearing bellcranks having arms extending rearwardly from the keyboard and fulcrumed at different heights, and also having at their rearportions upright arms; links extending upwardly from said upright arms, the latter being of graduated lengths, the arms at the middle of the system being longest and growing shorter by progression toward the sides of the system,

and the links being also of graduated lengths, being shortest at the middle of the system and growing longer by progression toward the sides of the system; a second set of bellcranks having rearwardlyextending arms to which said links at their upper ends are pivoted, and also having upwardly-extending arms of graduated lengths, the arms at the middle of the system being shortest and becoming longer by progression as the sides of the system are approached; forwardly-extending links pivoted to said upright arms; and .a system of lGZtlWtlCllY-S'fillklll g type-bars to which the forward ends of said links are connected.

54. In a front-strike writing-machine, the

combination of a series of key-bearing bellcranks having arms of various lengths exing at their rear portions upright arms; links extending upwardly from said upright arms, the latter being of graduated lengths, the arms at the middle of the system being longest and growing shorter by progression towardthe sides of the system, and the links being also of graduated lengths, being shortest at the middle of the system and growing longer by progression toward the sides of the system; a second set of bell-cranks having rearwardlyextending arms to which said links at their upper ends are pivoted, and also having upwardly-extending arms of graduated lengths, the arms at the middle of the system being shortest and becoming longer by progression as the sides of the system are approached; and a system of rearwardly-strikin g type-bars connected to said arms.

55. In a type-writing machine,the combination of a system of type-bars; a system of keybearing bell-cranks comprising rearwardlyextending arms and upwardly extending arms; and devices connecting said upwardlyextending arms to said type-bars so as to lock the latter in normal position; said locking devices including a system of links extending upwardly from said upwardlyextending arms. v

56. In atype-writing machine, the combination of a system of type-bars; a system of keybearing bell-cranks comprising arms extending rearwardly beneath the type-bars and upwardly-extending arms; a set of links extending upwardly from said upwardly-extending arms; and a set of sublevers connecting said links to said type-bars; said links locking said sublevers and type-bars in normal position.

57. In a type-writing machine, the combination of a system of type-bars; a system of keybearing bellcranks fulcrumed at different heights and comprising arms of various lengths extending rearwardly from the keyboard beneath the type-bars and also upwardly-extending arms; a set of links extending upwardly from said upwardly-extending arms; and devices connecting said links to said type-bars; said links locking said typebars in normal position; and a series of returning-springs.

58. In a type-writing machine, the combination of a system of rearwardly-striking typebars; a set of key-operated bell-cranks extending rearwardly beneath the type-bars and upwardly at their rear portions; a set of sublevers fulcrumed near the load-points of said bellcranks and having arms extending rearwardly over said load -points; links extending upwardly from said load points to said arms; and links connecting said sublevers to'said typebars.

59. In a'type-writing machine, the combination of a system of rearwardly-striking typebars a set of key-operated bell-cranks extend- IIO ingrearwardly beneath thetype-ba s and mp wa l' dlyat their rear portions a set of snblew ers fule'rumed. near the load points of said belleranks and having arms extending rearwardly over said load points; a, set of springs connected to one of said bell-crank and subleverj elements g links extendi ng upwardly from said load points to said arms and means for connesting said snbleverslto said type-bar;

60. his type-writingmaehine, the combination of a, system ofrearwafdly-strikingtypebars a set ef keyopemted bell eranks extending rearwardly beneath the type-bars andnpsaid sublevers t0 saidtype-bars.

BURNI-IAM (3. STIOKNEY. Vitnesses:

SLR. OGDEN, MIRIAM TICKNAR.

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