US1053065A - Type-writing machine. - Google Patents

Description

J. A. RONCHETTI.

TYPE WRITING MACHINE.

APPLICATION FILED APR. 27. 1908.

Patented Feb. 11, 1913.

Fig. 5

Inventor:

UNITED STATES PATENT ()FFICE.

SIGNMENTS, TO THE .NTOI SELESS TYPEWRITER COMPANY, OF MIDDLETOWN, CON- NECTICUT, ACORPORATION OF -CONNE( J"IICUT.

' 'rzrn wm'rms MACHINE.

Specification of Letters Patent.' 'Patnted Feb, 1 1 1913.

Application filed April 27, 1908: Serial No. 429,448.

-Toa ll who'hz, "it may concern:

'- Be'it known that I, J ossrn A. RoNc-HETTI,

al subject of the King of Italy, residing at.

Wooiisocket, in the. county of Providence and State of- Rhode' Island,have invented certain. new and useful Improvements in Type- Writing Machines, of which the following isa full, clear, andexact description, such as will enable others skilled in the art to which it appertains to make and use the same.,

This invention relates to typewriting' ma chines, and one/of the objects thereof is to provide improved means adapted silently to arrest the movements of certain operative parts thereof.

Another object of the invention is to provide improved means of simple construction adapted through a connection with the universal bar, to arrest without concussion or impact the strokes of the key levers when they are depressed to efi'ect printing.

Another object hereof is to provide sime ple and eflicient means forreturning the key levers to their normal positions after depression and for regulating the throw of the key levers. i

A further object of the invention is toprovide guiding means for the universal bar which will prevent a relative slipping move ment between the same and the key levers when the latter are depressed.

Other objects will bein partobvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations "of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, wherein.

is shown one of the various possible embodiments of my invention, Figure I is a front elevationshowing aportion ofa typewriting machine, parts of which are broken away better to illustrate'the construct-ion. Fig. '2

1s a side view thereof, partlyin section, and

Fig. 3 is a front view of one of the link devices employed to effect a silent stoppage of certain moving parts of the typewriting machine. T y

Similar reference characters refer to similar parts throughout the several views of the drawing.

Referring now to thedrawing, 1 indicates I [the front Wall of the frame of. a typewriting machine, and 2 and 3, respectively,the side Y walls thereof. Extending inwardly through the, sidewalls 2 and 3, in the present instance, are a pair of oppositely disposed pins, 4 and 5, which form pivotal supports for a universal rock shaft, 6, which is adapted through suitable connection to actuate the feeding'mechanism or other operatwo parts of a typewriter not herein shown. Rock shaft 6, in the present instance, is provided with an arm 7, between which and a fixed portion of the machine, 8, isinterposed a retractile spring, 9, which holds said rock shaft in normal position and assists" in the returning thereof to such position when the same has been rocked. :Itock'shaft 6 is also provided with a pair of forwardly extending rocker armsor actuating levers, 10 and 11, respectively, one of which extends therefrom at either end,said rockenarms at their forward ends carrying depending links or tension bars 12 and 13, rcspe'ctively','which support, attheir lower ends, the universalbar 14. This universal bar 14, upon which the'key levers 15 rest in the usual manner, is provided with a stiffening rib or truss, 16. Key levers 15, which in the present instance are supported at their rear ends upon the knife edge 17, extend forwardly through'the front portion of the machine and restintermediate their ends upon a cushion or pad of relatively soft,- sound deadening material, 18, carried by the universal bar.

In order to prevent the universal bar It from slipping sidewise with respect to the key levers when the latter are depressed, I provide guiding meanswhereby it willbe compelled to move in an are equal to the are described by those portions of the key levers which are in contact therewith. The guiding means in the present instance constituted by bracket 20 secured by nuz'ms of a screw 21 to the frame of the machine, said bracket being provided with aperture 22, which receives a curved pin 24, \Vllili'l depends from the middle portion of The universal bar. It will be seen that wluni the universal bar is depressed this pin. be

iug guided in the aperture 22 of bracket 20,

."s ta'nce, through. a connection with the rocker arms and '11, from which the universal bar is suspended. This mechanism, in the present instance, is constituted by. two pairs of links, 25, 25 and 26, 26, the links con' stituting each pair being pivotally connecta pai t spaced members. which-straddle arms 10 or 11 as clearly shown in Fig, .3. One end of each pair ofthese pivotally connected links is connected, as at 28,with one Attached .to each pair of links. 25, 25 and 26, 26 at any desired point .thereof, as at 33,

; is a retractile-spring, 34,.the opposite end of said spring being attached to a support 35, threadeduupon an adjustingscrew '36-,

which extendsthrough a lug 37 formed upon a fixed portion of th'e'machine frame. These .s'prings'norm'ally hold the: links ,25,"25 and 26, -26"'in flexed position, "asshown in. Fig. 2 and resist a movement thereof, which I would teIidfto-straighten thenyas when the universal bar moved downwar'd by adepression ofa ny of the .keylevers' In ;order; to prevent anoverthrow of the links '25, 25 and26, 26, when-they are straightened, as by a depression of the.uni-' versal bar, adjustable -.abutments are provided, as at 40, with {which the links engage whenthey are moved into alinement. These adjustable abutments are preferably Qprovidedfwith cushions, such as shown at 4 1.

Having thus describedthe construction 01E- this embodimeht of my 1nvention,-the op;- eration thereofwhich. should be largely obvious, is substantially "as follows:It will be seen that when thekey levers are (16 pressed, thereby causinga downward movement of the universal bar, the-- rocker arms IO'a'nd 11 respectively will be swung down ward through their connection with links 12 and 13, and that this operation will cause the double links 25, 25 and 26, 26" which have been held in flexed position by means of spring 34 to straighten. When these sets of double links have straightened, as when the links of eachset move into alinement,

.the universal bar wilLhavereached its limit of movement in a downward direction. The

parts accordingly will have been arrested without impact or concussion, and therefore noiselessly. During the above operav tion the spring 34 interposes a yielding resistance to the s traighte ning of the connected links, and said spring also assists in the returning of the parts to their normal position, shown in Fig. 2 of the drawings. During the depression of the universal bar, the same has been guided by means of the pin 24 which works in the aperture of *bracket'20, as has been above described. It ed 'togetheras at 27. Tiro -lowermost or floating .linkof each pair. is constituted by will accordinglybeseen that. I haveprovided a mechanism well adapted to attain,

among others, all the ends and objects above enumerated, in a simple yet etficient manner. Themovements of the universalbar and associated partsare arrested without any impact or concussion and the mechanism employed to arrest such movementsis also adapted to assist in the return of'the parts to their normal positions. The throw of the key levers may be conveniently and accurately regulated by an adjustment of the supports for the double links. The

mechanism employed for guiding'the' universal bar operates to eliminate friction betweenthe same and thekey levers and the touch is therefore made easier.

- While I have shown my invention applied to a universal bar of-a typewriting machine, it is obvious that the sameis not limited to such employment, but that'it is well adapted to be-associated with equal facility with other moving parts of type- Writing machines. As many changes could be madein the above construction 'andmany 'jappareutly widely, differentiem'bodiments' of this invention could be ma d e without departing from the scope thereof, it is intended that all .matter contained in the above, description or shown in the accompanying drawings shall be interpreted as illustrative and not in a' limitingsense. It isalso to be under- 8.100(1 that the language used in the followi: g..claim's is intended tocover all of the generic and specific features of the invention herein described and all statements of the scope of. the invention which, as a matter of language, might-be said to fall therebetvveen.

Having described my invention, what I claim as new and desire to secure by Letters Patent is I 1. In a typewriting machine, in combination with a movable part and independent.

means for advancing the same, a stop for said movable part comprising a plurality of normally flexed pivotally connected members extending betweena fixed portion of the machine and said movable member. 2. In a typewriting machine, the combination with a movable part thereof, of a flexed members pivotally connected to each' other and similarly connected with a fixed portion of the machine and with the movable part and means connected, with said movable member-for advancing the same.

.3. In a .typewriting machine, the combination'with a movable part, of a device for arresting themovementthereof without producinglnoise comprising a pair of links pivotcdto'gether and adapted normally .to lie in a flexed position, one of said links being connected-with a relatively fixed support and'the otlier with the movable part, and means connected with said movable member for actuating the samewhereby said stop device is actuated. i i

4. In atypewriting machine, the combination with a -movable part thereof, of means for silently arresting a movement of the movable part comprising a pair of pivotally connected links one of which is pivotally attaehedto a relatively fixed support and the other thereof to said movable part, said links normally lying flexed and arresting a movement of said part when straightened, and'independent means for transmitting-motion to said movable member foractuating the same. v

5. In a typewriting machine, the combination with a movable part thereof, of means fdradvancing said movable part, independ- "ent means for silently arresting a' movement of the movable part comprising a pair of pivotally connected links, one of which is pivotally'at'tachedto a relatively fixed sup 4 port and theothe'r to said movable part, said links normally lying in flexed position and arresting'a movement 'of said movable part when straightened, and means which yieldingly resists aistraightening of said links.

6. In a typewrit ingmachine, the combination with a. movable part thereof, of means for advancing saidmpvable part, independent'means for silently arresting a movement of said movable part comprising a pair of pivotally connected elements, one of which is connected with the movable part, a fixed support for the other of said elements, and spring means for flexing said pivotally connected elements, said'elements being adapted to straighten when said movable part is actuated, whereby the-movement of the latter will be arrested.

7. In a typewriting machine, the combination with a movable part thereof, of means for advancing said movable part, independent means for silently arresting a movement thereof comprising a pair of pivotally connected elements, one of which is pivotally connected with said movable part, an adjustable support for the other of said elemenls, and spring}, means for normally urging said elements in flexed positions, said elements being adapted to straighten when said movable part is actuated, whereb movement of the same will be arresteti the 8, In a typewriting machine, the combination with a movable part thereof, of means for advancing-said movable part, independ- .ent means for silently arresting. a movement thereof comprising apair of pivotally connected elements, one of which is" connected with the movable part, an adjustablesupport to which the otherof said-elements is pivotally connected-,cand spring means for normally urging said pivotally connected elements to flexed positions and for yieldingly resisting such, movementthereof as wouldtend to straighten them.

9. In a typewriting machine, the combination with the universal bar and the key levers whichrest thereon, and-means for arresting a movement; of the universal bar when the sameis depressed by-one of the key levers, comprising a pair of pivotally, connected links, one of which is connected with the universal bar andthe other with a relatively fixed portion of the framing of the machine, and springmeans for urging said links to flexed positions, said links being adapted to straighten when the universal bar is depressed whereby the movement thereof will be"yieldingly resisted and ultim'ately effected. j V

10. In a typewritingmachineQthe cQmbination with the universal bar and the key levers which rest thereu'poniof, means for arresting a movement-of the universal-bar when'the same is depressed by one of the key levers, comprisinga pair of pivotally connected members, one of which is connected with the universal: bar andf'th other with a relatively fixed support and spring means connected with said members near their point of fiexure adapted to'iirge said members to flexed positions and to yieldin gly resist a straightening movement thereof when the universal bar is depressed 'i'vhereb the movement thereof will be arrested. 5

11. In a typewriting machine, the combination with auniversal rock shaft, arms extending from said rockfshaft, a universal bar suspended upon links which depend from said arms, and the key levers which rest upon said universal bar, of means for arresting the movements of said above mentioned parts comprising a plurality of pivotal-ly connected members one of "which is attached to one of said arms, a relatively fixed support to which the other of said members is pivotally connected, and a spring connected with said members "near their point of flexure and "adapted to urge the same to flexed positions.

12. In a typmvriting machine, the combination with the universal rock shaft, rocker arms extending from said shaft, hangers depending from said arms, a universal bar I suspended tupoiiiysaid f and the key I levers' Which luni'versal bar, of, means jfori arrestln a above mentionedparts I I prising'jtwo pairs of pivotally connected}- one of the links of each pairbein'gy votally c'onnected with oneof .isaid- 1,rocker{'arms, relatively fixed supports to whichtlieaother link of each pair is-pivotallyfibnnecteglifand a spring connected "to each pair of 'links'near its point of 'flexure adapted to resist-a niovement of-said links -which"*would tend to straightenthem as when the universal bar is depressed byone of the key levers.

13; In a typewriting machine, the combination with the universal-barv adapted to support the key levers and movable means upon which said universal bar is suspended,

of means for silently'arrest-ing the move nected with a relatively fixed support, a,

spring connected'to the links of each set near their pointrot-p flexure adapted yieldingly to resist a straightening ofsaid links when th universal-bar is depressed byone of the key levers to return said universal bar to its normal position when the key lever is released 7 'i 14. In a typewriting machine, the combination with the universal Qba'r, vtheqkey le vers which rest upon said-bar and-the means from which said universal bar isxsuspended, of means for arresting the movement of; the above mentioned parts when the universal bar is depressed by one of the key levers,-

comprising a pair of pivotally connected members,'one of which is'connected with the support of the universal bar and the other with a relatively fixed support connected with the frameof the machine, a spring connected with said pivotally lconnected members and adapted to urge the same to flexed positions and to resist a straightening-movement of said membersfwhen the universal bar is depressed, ean'si for adjusting the "support for said members, and

means for varying the tension of said spring,

15 In a typewriting machine, the combination with the universal bar, the key levers which rest thereupon and a movable support from which saiduniversal bar is suspended,

of means for yieldinglyresisting depression of the universal bar when one of the keylevers is actuated and for silently arresting the movement thereof at the end of the stroke of the key lever, co mprising a system of .pivotally connected links adapted normally to lie ina condition of flexure, a

spring connectedfwith said system and adapted to urge thesame to flexure, oneend ements of said 16. In a typewriting machine, the combination with a movable part, of means for arresting a movement thereof comprisinga pair of pivotally connected links one of which is attached to said movablepart and the other to a relatively fixed support, means for urging said links to positions of flexure and for resisting a straightening movement thereof, and means coacting with the links for preventing said links from overthrowing .when straightening.

- 17. In a typewriting machine, the combination with the universal bar, thekey levers which rest thereupon and a universal ro'ck shaft having arms upon which said universal bar is supported, of means for arresting the downward movements 'of said universal bar when the key levers are depressed comprising a double link, one end of which'is pivotallyconnected ,with each of said arms, an adjustable support to which the other end of said double is pivotally connected, an adjustable spring for urging'-said link to a condition of flexure and yieldinglyresisting a straightening movement thereof, means for adjusting said support, means for adjusting the tension of. said spring, and an adjustable'mea-ns. for preventing, said link from overthrowing when the same is straightened. v 1

18. In a typewritingmachine, the combination with the universal rock-shaft having. arms thereon and a universal bar suspended therefrom, key levers which rest upon the universal bar, .of means for compelling a movement of the universal bar when same is depressed by one of the key levers in the same are that those portions of the key levers which rest in engagement with the universal bar move when they are depressed.

19. Ina typewriting machine, the combination with asuspended universal bar upon which the key levers rest, and means indc pendent, of-the suspending means for guidingsaid universal bar and for compelling it to move in the same are when depressed by the key levers as the portion ofthe key levers in contact therewith.

20. In a typewriting machine, the combination with the universal bar and the key levers whichqest thereupon, of a universal rock shaft, supporting means connected therewith for said universal bar, and guides for the universal bar which compel the same to-move in the same are as that de scribed by those portions of the key levers in contact therewith when said universal bar is depressed by the key levers.

- through' the;aperturelof said bracket, said -framing-of the machine andthe other supnation with the universal bar and the key meow aL-ln'n ty ewriting machine, the combil nationwith tie universal bar.and;the key. levers -which rest thereon, of an apertured bracket extendingafrom' ai fixed portion of the machine, and a cnrved member depend-.. ing :tromzsmd universal bar and extendingmemberlo )erating to-. guide the; universal barJ hent esame is-depressed..- 22. In 'a typewriting machine, the .COmbk nation with'a pivotally ans ended universal bar-and .the-keyJlevers whic i rest'thereupon,- of means for guiding the universal bar and causing it. to move in an are'when depressed, comprising coactingmemhers, one of which is supportedfupon'the fixed portion ofthe ported upon said universal bar;

23. In-a typcwriting machine, the combilevers which rest thereupon, of means for guiding the universal bar and causing the same to move in the arc of a circle when the same isdeprcssed comprising an aperturedmemher extending from a-fixed portion of the frame of the machine centrally 'of the universal bar and beneath the same, and a curved member depending from Sttl(l universal bar and moving in the apertureof said fixed member when the universal har depressed whereby the latter is guided.

24. In a typewriting machine. in combination with a ivot'ally suspended universal l ar and a key ever in contact therewith for actuating the same. means for guiding the universal bar along the path taken by the point of contact between the universal bar and the key lever.

25. In a typewriting machine, in combination, a frame, a relatively fixed part mounted upon said frame. a movable member, a )lnralit'v ol' pivotallv connected links norma l v lying in flexed position between said relatively fixed part and said lnovahle member; and a screw coniu-cted at one end to the frame, and so attached at its other end to said' relatively fixed part as to be effective as a tension-member to prevent a displacement of said list-d part when said plvotally connected links are being straightcued.

26. in a t v wwr iting machine. in combinatron, a frame. an actuating lever having a pivotal connection thcrc\\'itl|,,u ke v-lever. a tension-bar operativelv connected at one end to said key-lever an at the other end to said actuating lever, a movable part. and an interveningfloating link pivotally connected at dill'vrrut points to said actuating lever and said movable part. the pivot point between said actuating lever and said floating link adapted to move relatively away from the' )Ullll of operative connection hetween Stilt tension her and said he) lever as the key lever is depressed.

I 27. In" a typewriting machine, in combination a frame, an actuating lever having a pivotal connection therewith, a key-lever pivoted to the frame, a tension-bar opera tivelyconnected at one-end to said key-' lever and at'the other end to actuating lever, a movable art, and an'intervening floating link pivpta ly'connected at different points toeaid -actu'atin' lever and said movable art, thefixed 'pivotal points of said kevever and said actuating lever being on the same side of said tension-bar.'-

'28." In 'a typewriting machine, in combination,"n.' frame, an actuating lever having a pivotal'connection therewith. a key-lever. a tension-bar o eratively connected at one end to said keyever and at the other end to actuatine lever, a movable part. an interven ing floating link forming one partof atoggle pivotally connected .at ditlerent points to said actuating lever and said m'r vable-part, and a spring connected therewith for breaking the toggle.

29. In a typewriting machine, in combination, a frame, an actuating lever having a pivotal connection therewith, a key-lever, a tension har operatively connected at one end to saidhev-lever and at the other. end to said actuating-lever. a movable part, an intervening floating link pivotally connected at diti'ercnt points to said actnatiig lever and said movable part, and a spring connectedto said tloatingiink for restoring'the parts to normal position.

- 30. In. a typewriting machine. in combination. a frame, an actuating lever having a pivotal connection therewith. a key-lever. a tension-bar operativcly connected at one end to said key-lever and pivotally connected at its other end with said actuating lever". a movable part. a floating link pivotally connected at ditlercnt points to said actuating lever and said movable part. and means for adjusting the normal position of one of said parts relatively to another. the pivot point between said actuating lever and said tension-bar adapted to move continually away lrom said adjusting means when said keylcver is depressed.

31. In a typewriting machine. in combination. a frame. an actuating lever having a pivotal connection therewith. a key-lever, a tension-liar operativelv connected at. one end to said low-lever and at. the other end to said actuating lever. a movable part, an iritorvening floating link pivolally connected at dillerent points to said actuating lever and said movable part. and a spring at,- tached at one end lo suitl floating link and movahly supported at the other end.

32. in a typewriti 7: machine. in combination. a frame, an aetuatin lever having a pivotalconnection therewith, n key-lever, a tension-bar operatively connected at one end to said key-lever and at the other end to actuating lever.

33. In a type'writing machine,'in combination, a relatively 1 fixed support-ya lifloating link, a link-pivoted mead support and also pivotedat'itsjlower'ixtremity to' -said floating-link,- 'saidlinks {forming a normally l'flexed'f 'toggle, a spring connected to said 1 floating link at a point distant from the con- 13* and a connection whereby upon depressing said finger lever said normally flexed tog will be straightened.

nection between said links, a finger lever,

34:. In a typewriting machine, in combination, a relatively fixed portion, a universal bar, a, key-lever adapted to rest on said universal bar, a plurality of pivotally conn cted members forming a toggle between said relativelyfixed portion and said universal bar adapted to be extended into a substantially straight line, when said keylever is depressed, and means for silently arresting the key-lever at the end of its upward movement.

35. In a typewriting machine, in combination, arelatively fixed portion, a universal bar, a plurality of serially disposed pivotally connected members adapted to assume extended position but normally lying in flexed position and constituting a toggle interposed between said relatively fixed portion and said universal bar, and resilient means connected with one of the said serially disposed members adapted to hold the same inflexed osition.

36. In a typewriting machine, in combination, a frame, an actuating lever having a pivotal connection therewith, a member attached theneto, a movable part, an intervening floating link pivotally connected at different points to said actuating lever and said movable part, and a spring connected at one end with said floating link and at the other to said member for returning said parts to normal position.

37. In a typewriting machine, in combination, a relatively fixed portion, a universal bar, aplurality of pivotally connected portions normally lying in flexed position interposed between said relatively fixed portion and said universal bar, resilient means connected with one of said portions adapted to hold the same in flexed position, and

means for adjusting the tension of said rcsilient means.

38. In a. typewritjng machine, in combination fa. mlat.ivcly fixed portion, a univer sal bar 'withkey-levers for actuating the same, a rplinality of intermediate pivotallv connecte portions normally lying in flexed attached to said position, and. resilient means adapted-to aid in returning said pivotally connected portion an'd said universal bar to normal positioniwh'en movedtherefrom by said keylevers'.

39. In atypewriting machine, in combination, a relatively fixed portion, a universal bar, a member pivotally connected with said relatively fixed portion, a second member connected with said first member adapted to form a toggle therewith, means connecting the end of the second member with said universal bar, and resilient means for normally holding the toggle formed by said members in flexed position.

40. In a typeu'riting machine, in combination, a relatively fixed portion, a universal bar, a link pivotally connected with said. relatively fixed portion, a second link connected with said first link adapted to form a toggle therewith, means connecting the end of the second link with said universal bar, resilient means for normally holding the toggle formed by said links in flexed position, and means for adjusting said resilient means.

41. In a typewriting machine, in combination, a relatively fixed portioma universal bar, a link pivotally connected with said relatively fixed portion, a second link connected with said first link adapted to form a toggle therewith, means connecting the end of the second link with said universal bar, resilient means for normally holding the toggle formed by said links in flexed position, means for adjusting the tension of said resilient means, and separate resilient means adapted to aid in the return of said universal bar to normal pisition.

42. In a typewriting machine, the combination with a movable part, of means for silently arresting and limiting the movement of said movable part comprisingv a pair of pi otally connected members, one of which is connected to said movable-part and the other to a relatively fixed part of the machine, and means associated with one of said pivotal points of connection for adjusting the length of travel of said movable part.

43. In a typewriting machine, thecombination with a movable part. of means for silently arresting and ,limiting the movement of said movable part comprising a pair of pivotally connected members, one of which is connected to said movable part and the other adjustablv connected to a relatively fixed part of the machine. and spring means extending between one of said pivotally connected members and said movable part adapted to aid in rcturningsaid parts to normal position.

1!. In a typcwriting machine, in combination. a relatively fixed portion, a movable ilwmla-r. a toggle interposed between said fixed f; member}. and "said {movable -member "member-o ilepression fofzsaid lcey lcvero "nation,

n a ftypefivritingi machine,'- in 'combi member ditl'erentipointsfto saidjactuatingllcver;and 'saidfmovable partp a-sprmg connected \\'llll "saidjzfloating ,link: at one end and to said 15.

memberjatithei-"otheryfor. returning" said arts to normal 'positiongand means for adjustingthehormal. position of one of said parts relatively to another.

- 46.-In atypewriting machine, in combination, a frame,'an actuating leverhaving a pivotal Connection therewitlna key-lcver,

a tension-bar'o rativelv .connected atone end'to said'keyever andpivotally connectedntdts other'end with said actuating'lever,'-a movable part, a. floating link pivotally -eonnected at. different 'points to said actuatiiw'lcver and said movable part, means for adjusting the normal position of one of -said parts relatively to another, and spring means attached to said floating llnk adapted to aid in returning the parts to normal position.

I -47. In a typeivriting machine, in combination. a frame, an actuating lever having a pivotal connection therewith, a key-lever. a tension-bar o e'rativel to said kcyever an piv0tall --connei:ted at its other end with said actuating lever,

a movable part. a' floating link pivotally,

eonnccted at. different points to said actuating lever and'said movable part, and means vfor ndjnstinp the normal position of one of said parts relatively to another. the distance between .the. pivot point connecting .said actuating-lever and said floating link and the point of operative connection of said tension bar and'lvey lever heing adapted to increase as said kev'lever is depres ed. I

'48. In a typewriting'machine, in'eombination. a frame, an actuating lever having a pivotal connection therewith, av kev-levcr pivoted tqitlte frame, a tension-l ar operatively connected at one end to said kev-lever and pivotally connected at its other end with .saidiu'tintting lever. a movable. part, a floating link pivotally connected at different points tosaid aetuat-inglever and said movable part. and means for adjusting the normal position of one of said parts relatively to another, the fixed pivotal foints of saidkey-lever and said actuating ever being on' the same'side of 'said-tension-bar.'.

"49. In a tiypcwriting machine, in'combination, a frame, an actuating lever. having a pivotal eonn'ectiontherewitb, a pivoted keypivotal connected at one end -lcvcr,-a tension-bar intermediate and opera- -.tiv'ely:connccted with said ,two levers, a -n'1ovahle part, afioating linkpii'otallyconnectcd at one point to saidmovable-part and at anothcr': poinbto said 'actuating leyer, 70

' justing'thenorma'lrelattonbeconnected to said floating link-for" restoring the parts to normal"position ,'thc fixed pivot -pointsfoffsaid first mentioned levers bemg ofl'th'e sameside"ofisaid tension-bar; 5

50.;In a'typcwritin'g nnichinc. in combination a frame, an actuating lever having a connection therewith, a key-lever, a tension-bar 0 rativelv connected at one end so to said ke iii/er and at the other end to actuating ever, a movable part, an intervening floating link ivotally connected at different. points to said actuating lever and said movable part, and'a spring forrcturns5 ing said parts 'to normal position, the distance between the pivot point connecting said actuating lever and said floating link and the point-of oierative connection of said'tension bar and l ey lever being ada )l((l to increase as said key lever is depressor.

51. In a typewriting machine. in combination,-a frame, an actuating lever having a pivotal connection therewith. a key-lever. a tension-bar operatively connected at one-end 9a to said key-lever and pivotally connected at its other end with said aetuatin; lever. a

.inovable part. 'a' floating link pivotally connected at'difierent pointstosaid actuating lever and said m vable part, a spring for returning said parts to normal position, and means for adjusting the normal position of one of said parts relatively to another. the. distan e between the pivot point connecting saidactnating lever and said floating link 1 6 and the oint of operative connection ofsaid tension ar and key lever being ada )tcd to increase as said key lever is depresset 52. In atypewriting machine; in combination. a fixed frame-portion provided with 1 a threadedaperture, a threaded shank adapted to serve as a'tension member having one end in said aperture and havingits other, end extending away from said frame pottion and terminating at a distance there from; a link-support connected with the outer end o! Mlld threaded shank and adapted lo he aojnsmbly, distanced from said frame-portion upon rotating said threaded shank. a lock device etl'eetive to maintain the adiustnlent of the link support, a'link pivoted to said link support, and normally extending downwnrdlvtoward the rear of the base of the machine and adapted to swing intoa position in a iproximate parallelism ,with said threaded-shank tension member, a floating link pivotally connected to the extremity of the aforesaid link, said links forming a normally flexed toggle, a

vening between said finger lever andsaid toggle whereby upon depressing said finger lever the normally flexed toggle will be straightened into approximate parallelism with said threaded shaft, a contractile spring connected to said floating link at a point below and distant from the connection between said links and adapted to return the links forming the toggle to normally' (.0 flexed (position after having been actuated by sai finger lever, and a movable part pivotally connected to one end of said float- Copies 0! this ptentmav be obtained for ing link and extending therefrom horizontally toward the rear of the machine, the movement of which is adapted to be silently and gradually arrested without impact or concussion by said straightening toggle.

In testimony whereof I ailix my signa- 'tu re, in the presence of two witnesses.

JOSEPH A. RONCHETTI.

Witnesses:

ARTHUR J. B. HUnsoN, RoiLrN E. BALLOT).

fiv e cents each, by addressing the Commissioner of Patents, Washington, D. C.

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