US1765061A - Key action for typewriters and other machines - Google Patents

Description

-June 17, 1930.

o. u/ DESHA 1,765,061

' KEY ACTION FOR TYPEWRITERS AND OTHER MACHINES Filed Jan. 27, 1928 2 Sheets-Sheet 1 0. u. DESHA June 17, 1930.

KEY ACTION FOR TYFEWRITERS AND OTHER MACHINES Filed Jan. 27, 1928 2 Sheets-Sheet 2 Patented June 17, 193( titan OBVILLE U. DESHA, on roar mins, coiionano, assicivo'n or oirii-ri'rr'n TO THE IDESHA myiennnx racer iis'ra'rn, or rear oestrus, coiionano KEY ACTION FOB TYPEVTRITEBS AND OTHER MACHINES Application filed January 2?, 1928. Serial No. 249,880.

In regard to certain more specific features thereof, my invention relates to improvements in the associated and coacting parts of a key mechanism of a machine whose actuatv. in means oaerativel connecting the t e e l y a bar and key lever move the type barto the printing point upon depression of the key lever; said connection embodying coacting means reversely breaking the said connection 1 after the printing impact of the type bar for the return of the type bar to its normal position while the key lever is indepressed position, and also including coacting means for restoring said connection to normal operative position upon release of the key lever; this broad object being the subjectinatter of an application filed by me on November 5th, 1923. Serial No. 672,871, upon which Patent 1,643,203 issued Sept. 20, 1927, as a contradistinction vbetween previous devices comprising a detachable connection or gap at some point between the keylever and type bar after the latter has been given the movement necessary to effect the printing and before the key lever I has completed its cycle of movement.

manufacture, convenient and easy to arrange T and assemble compactly, and construct a key 4.0 mechanism as to be but little likely'to get out of orderin usual operation. 1

My invention, accordingly, consists in certain combinations of elements, features of construction, and, arrangement of parts, that.

may readily be incorporated in certain type- Writing machines with only slight modification of the structural features of' said machines as they now exist, exemplified in the construction hereinafter set forth, which will i he more readily understood from an inspection of the accompanying two sheets of drawings and the following specification, the scape of the invention, being indicated in the appending claims.

My invention is especially applicable to the usual hand operating machine, as distinguished from a motor driven machine, and is shown in the present case embodied in a machine similar to the Royal standard type- Writer.

machine of this type, but may be employed wherever found available; I

The applicant has endeavored to disclose and describe the construction of the mechanism and manner of its operation and its use in language comprehensible to those versed or skilled in the art who would make or use the device, sufiicient to satisfy the requisites of this application, without enumerating every obvious object which is cured or ameliorated by his improvement over the present state of the art, the following being a brief description of the several views of the drawings: Fig. I is a sectional elevationof a type. Writingv machine taken longitudinally and" about centrally thereof,.constructed in accordance with my invention and showing elements of one key action only innormal position, and

also showing so much of the usual mechanism of the machine as Is necessary to illustrate how my invention may be embodied therein. Fig. ll, represents a view of the key action It should be understood, however, that the invention is IlOtTGSlDIlCtGCl to use in a similar to Fig. I, the key lever being shown depressed andresponding the type bar. Fig.. IE1 is a key mechanism SlHlllftI to Fig. I, the key lever being shown in a depressed position and the type bar responded to printing position. Fig. IV is alsoa key mechanism similar to Fig. the key lever being shown in a de.-,

pressed position and the type bar returned to its initial position. In this manner the key lever may be held down to its limit of movement and thetype bar will complete its incident of response to effect the printing and move out of engagement with the platen and complete its cycle of movement regardless of whether or not the .rey lever is released, thus relieving the key lever of Work during the 1mpart printing operation.

the corresponding several views and in order to facilitate observance of a clear distinction between this and copending applications, the reference characters also indicate, as far as practical,

55,227 'filed'September 8, 1925 and Serial Nos. 178,083, 178,08. 178,085, rzaose, 178.

087, 178,088 and 178,089 filed March 24, 1927.

' ln the embodiment in'Fig. l, more in detail in which oneform of type action is shown as applied to typewriting machine to which it is particularly adapted, 1 indicates the typewriter frame-l indicating the front and 1 the rear. 7 5 indicates a common platen mounted as usual to travel longitudinally across the rear upper portion of the machine upon a carriage mechanism. As the carri e mechanism forms no part of the present 1n' vention, specific disclosure and description thereof is omitted as its broad function 15 well known. 6-1nd1cates one of a series of type bars being radially arranged in a curved:

row about the same center and are movable about their fulcrum plvotrod 9 on a type bar segment 10, I, from a horizontal or forwardly extending radial position E as the type 7 forms the arc of vibration G. and is broughtagainst the front face of platen 5 to a common printing point A. to an upright radial position as shown by radius F. 12 in-f dicates one of a series of key levers carrying at the front end finger key 13, the rear end pivoted at 14 to bar 14 in the rear of the machine, and is kept normally in its elevated position by the usual spring 15 supported by saidbar I l at normal rest the key lever bearing against the underside 15 of the buffer bar for the keylever 12. 17 indicates a key lever arrestor-comprising a bar extending across the machine supporting a series of buffer springs 17 a corresponding in num her with the key levers 12. Each buffer spring 17 is coiled about a buffer pin 17 with a cap head communicating with the underedge of the key lever, limiting the downward movement of the latter. The extension of the buffer spring 17* is adjustable by set' rod 14 beside its key lever. The upper end of the vibratory lever 18 is pivoted at 19 to parts in the several views of my copending applications, Serial No/ the rear end of accelerating linkage com prising a plunger link 20 and a sleeved link 21 with a. slidable oint at 21 and operatively connecting the type bar 6 at (3. 22 indicates an accelerating spring coiled about the circumference of the plunger link 20, front end thereof communicating with the rear end of the sleeved link 21 and the rear end of said spring 22 is arrested by a fixed collar 2O carried by said plunger link 20. A reversely breaking actuating linkage open atively connecting the key lever 12 and vibratory lever, comprise an actuating lever 23, fulcrum trip lever 2 i'and a roller trip 25. The actuating lever 23 is pivoted at 23 supported by bar 26. extending acrossthe machine above the key lever 12 and beneath the-fulcrum trip lever the forward arm 23 provider. by said actuating lever 23. operatively connects the key lever 12 at 28 by a pin and slot connection; The fulcrum trip lever 24 ispivoted at 24 to the upward enl of the actuating lever 23 and is provided with depending trip arm 2 1 communicat ing with a fulcrum trip bur 28 Fig. ll. provided by the forward ,e of theactuat" ing lever 23 reversely breaking the trip elements after printing impact of the type bar 6 for returning the latter to normal position of rest on cushion 11 while the key lever is held in depressed position as shown in IV. The rear portion of the fulcrum trip lever 241- is provided with eye-let 24 which eyelet engages the angular vibratory lever 18. The roller trip 25 comprises a wheel rotatably about iiXed axle forming the end of said eyelet of the ba :ward portion of the fulcrum trip lever 2a. The angular vibra tory lever 18 is provided with a saddle backed seat 18? limiting the downward movement of roller trip '25 and also is provided with an interlocking hump 18 operatively interlocking the roller trip'25 with said angular vibratory lever for moving the type bar to printing point upon depression of the keV lever. The a tuating lever 23 is provided with a return bur 23 at its rear edge communicating with said depending trip arm 24" of the trip lever 24 for restoring the trip lever and roller trip 25 to normal operative position within the saddle-backed seat 18 upon release of tl e k lever as shown in Fig. l. 27 indicates a vertically disposed return spring for returning the angular vibratory lever 18 and plunger link 20 to normal position of rest against a buffer bar said bar extending across the machine in the rear of the latter, limiting the backward movement of the angular'vibratory lever 18. The new mechanical structure, combination of parts and operation thereof are the lmportant factors of the invention in providing the desired function of the key action, a further description of the operative prim ciple therefore, follows: I

incident of response, E to A, of the type bar a :The key lever 12 is described as having two incidents of operation before completing its operative cycle, namely; the incident of'depression and the incident of release. The incident of depression is disclosed by the movement of the key lever 12 from radius B to radius C, and the incident of release is disclosed. by the movement of the key lever back from radius C to radius B. The type bar 6 is described as having two incidents of opera tion before completing its operative cycle, namely; incident of response and incident of recoil. The incident of response of the type bar 6 is disclosed by the movement of the type bar from its initial rest radius E to printing point A, at radius'F, forming arc G" from pivot 9. The incident of recoil of type bar 6 is disclosed by its movement frointhe printing point A back to normal rest E thereby completing its operative cycle. These incidents of operation are, of course, common in nonreversely breaking type bar actions in so far as the incident of response, E to A, of the type bar 6 occurs simultaneously with the incident of depression, B'toC, of the key lever 12, and the incident of recoil, A to E, of the type bar occurs simultaneously with the incident of release, C to B, of the key lever. In other words, the operative cycle of the type bar and that of the key lever are simultaneous in a nonreversely breaking con nection, but the broad function inherent to the present key action relative to the correlation of incidents of operation of'the key lever with that of the type bar is in providing the operative expedient by which loot-h the and the incident of recoil, A to E, occur during the one incident of depression, B to C,

of the key lever, the type bar completing its operative cycle while the operat1ve cycle ofthe key lever is only half complete. it may be observed that the cycle of movement of the element interpositioned between the key lever and the type bar relative to cycle of movement of the key lever determines. the

novel action of certain specific elements aside from their novelty of form and other novel coacting cycle of movement substantially coincident or simultaneous with the operative.

features which they might embody. In this case the sleeved link 21 comprising one of the elements of the accelerating linkage has a cycle of the type barQ The actuating lever 23, fulcrum trip lever 24 and roller trip lever12. The vibratory lever 18, the plunger link 20 operated by said vibratory lever, and the accelerating spring 22 carried by said plunger link have a c'oacting cycle of movement independent of the cycle of movement of the type bar: or the cycle of movement'of the key lever.

The operative expedient of the present key action is accomplished in this case by a reverselybreaking actuating linkage connect -w, in a system of accelerating linkage connecting the type bar and key lever moving the type to printing point upon depression of the key lever, and reversely breaking said actuating linkage alternatively disinterlockingn" said actuating linkage returning the type bar to normalposition while the key lever is in depressed position. Upon depression of the key lever the upward end of the actuating lever 23 moves forwardly carrying with iii-i7 the horizontally disposed fulcrum trip lever 2a with longitudinal movement the operative relation of the roller trip 25 within the saddie-backed seat 18 provided by the angular vibratory lever 18 aided by the interlocking? hump 18 operatively interlocks the roller trip 25 with said angular vibratory lever moving the latter forwardly thereby actuating the accelerating linkage forwardly; and upon a quick depression stroke of the 'key lever the energy of gravity through the weight of the type bar compresses or energizes the accelerating spring 22'providing a resilient or light touch at the beginning of depression of the key lever and as momentum T of the key lever increases the energy stored up in said accelerating spring reacts upon the type bar through the slidable link 21 and moves the former toward the printing point. Bythetime the type bar has ar ived at 26 5 point onarc G to about radius Ea, Fig. 11, the depending trip arm 24 of the fulcrum trip lever communicates with the. forward fulcrum trip bur 23 provided by the-actuating lever 23 and diverts the forward movement x Y of the fulcrum trip lever 24 vib ratorily upward about its pivot 24* thereby tripping the roller trip 25 out of operatively interlocked relation with the angular vibratory lever 18,

as shown in Fig. Ill, and the accelerated-e momentum affected by the accelerating linkage continually moves the type bar from radius Ea to printing point A, radius F, while the angular vibratory lever 18, plunger link 20 and accelerating spring 22 return 5021 normal position completing their cycle of movement before the cycle of movement of the type bar or the cycle of movement of the key. lever has been completed.

In reversely breaking key action it is desirable that means be provided whereby the key lGVEI may havea relatively short depression str lie for actuating a full response stroke of the type bar to printing point. This operative expedient is accomplished in this case 1' in the following manner: Figsl and lV,dis close that the normal operative position of the forward end of the plunger link 20 extends througn and forwardly beyond the sleeved portion of link 21 and remains in this position G to about radiusEa as shown in Fig. If,

and Fig. III, discloses that the momentum of the type bar continues the movement of the latter to printing point further sliding the sleeve-d link forwardly on said plunger link 20 thereby operatively elongating the accelcrating linkage betwen the type bar and the vibratory lever 18. The disclosed means of operatively elongating the accelerating linkage connecting the type bar and angular vi bratory therefore operates the type bar 6 with about one-fourth of an inch to three-eighths of an inch stroke of finger key 13 contrasted withrthe usual ive-eighths of an inch inherent to a nonreversely breaking key action. 7 r

The slidable elongation with its alternatively shortening of the accelerating linkage provides a key action wherein the incident of recoil of the type bar is relatively quicker than the incident of its response in order that the type are G may be cleared as rapidly as possible when several keys are being manipulated in rapid succession there being no means obstructing the recoil of the type bar after printing impact the printing percussion aided by gravity returns the type bar with eflicacious recoil momentum. However, when there is no connecting means to retard the recoil of the type bar, the excessive rec-oil percussion oi the type bar with the cushion rest .11 is also inherent to a reversely breaking actuating coupling. The applicant, therefore, endeavors, in this case, to provide a key action wherein the recoil of the type bar is absorbed by means which substantially neutralizes the recoil percussion of the type bar with the cushion rest 11 in the following manner Fig. l discloses that the relative normal position of accelerating spring 22 and slidable portion or" the sleeved link 21 are communicative and the spring has reached its limit of expansionwhen the momentum of the type bar has slidden sleeved. link 21 away from said spring 22. The spring 22 however, being long enough to function as a butler spring con- ;tacts with the sleeved link 21 and absorbs recoil momentum of the type bar neutralizing the excessive recoil percussion of the latter with said type cushion rest 11.

It is equally important that reliable and rapid be provided for restoring the elements 24 and 25 oi? the reversely breaking acttz 1g linkage to normal operative position upon release of the key lever, this being accomplished by the depending trip arm 24 provided by the fulcrum trip lever 24: communicating with the backward return our 23 provided by the actuating lever 23, actuating the rear end or" the fulcrum trip lever 24 downwardly thereby restoring the roller trip 25 and angular vibratory lever 18 to normal operative interlocked position.

In a reversely breaking key action when operating a certain type bar in rapid succession, as when printingdoub-le lettersin-a word, it is desirable that the reversely breaking connectionbetween the key lever and type bar reversely break and in turn operatively interlock before the type bar has re turned to its normal. position in order that when the key-13 is depressed part way down in rapid succession, the type bar will move to printing point A and only partly return on are G to about radius Ea Fig. I, and alternatively impact and recoil within the radii of FEe. This operative expedient is accomplished by the angular vibratory lever 18 having a coacting cycle of movement with the pl nger link 20 and accelerating spring 22. substantially independent 01 the cycle, of the movement of the type bar or key lever. The relative instant of operation of the actuating elements is predetermined or, timed in order that the roller trip 25 may be tripped out of the saddle-backed seat 18 about the time the type bar 6 responds to radius Ea,

Fig. 11, and while the type bar 6 continues to move under the influence oi momentum from radius Ea to radius F the vibratory lever 18, V

plunger link 20, and accelerating spring 22 return to normal position of rest as shown by Ell before the type bar 6 has reached the printing point A; hence the key lever may e released immediately after the type bar v has reached point on are G to about radius 1a again interlock the trip elements 18 and 5 a out the time the type has reached the "-ri ting point and begins to recoil, and while he type bar returns from radius F to radius Ea the key lever 12 may again be moving from radius B to radius G and the depression nergy of the key lever again overcoming the recoil energy of the type bar on the return of the'latter to about radius EaFig. 11. At this stage of operation the accelerating spring 22 absorbs the opposing forces or the depression of the key lever and recoil oi": the type bar again responds the latter from Ea toF with ehicacious impact. Inherent to a reversely breaking key action when the elements reversely break before the key lever has reached the limit of its downward movement the latter has a tendencyto drop effecting an uneven touch during the depression oi the key lever, This eXigency versely break, thereby effecting a uniform depression movement of the keylever.

madc in Finally, it Will be seen that the present invention provides a simple and practical type action which will be rapid and etlicient in use, accomplishing, among others, all of the objects ar-cl ad abov set forth, therefore 1 the above descripthereof is believed to be h [is I changes could be above construction and many apparently Widely different embodiments of this invention could be made Without departing-from the scope thQl" l is intended that all matter contained in the above description, or shown in the, accon'ipanying drawings, shall be interpreted as illustrative and not in a limiting sense, and variations may be re sorted to Within the scope of the invention, and portions of the improvement may be used Without others. I "Having described my invention, What I claim as new and desire to secure by Letters llatentis:

' "1. In a typewriter key action, a type bar, a key lever, a pivot .rodfor therear end of said key lever, an angular vibratory level loosely mounted on said key leverpivot rod beside its key lever, an accelerating linkage operatively connecting the type bar and vibratory lever, a reversely breaking actuating connection operatively connecting the key lever and vibratory lever moving the type bar to printing point upon depression ot the key lever, means reversely breaking said connection after printing impact of the typebar for returning the type bar to normal position While the key lever is in depressed position.

" 2. In a typewriter key action, a type bar,

a key lever, a pivotal rod for the rear end of said key lever, an angular vibratorylever loosely mounted on saldkey lever pivotal rod beside its key lever, an acceleratinglinkage operatively connecting the type bar and vibratory lever, a reversely breaking actuating connection operatively connecting the key lever and vibratorylever moving the type bar to printing point upon depression of the key lever,means reverse'ly breaking said connection after printing impact of the type bar tor returning the type bar to normal position While the key lever is in 'depressed position,

means. restoring said reversely breaking actuating connection to normal operative position upon release of the key lever.

3. In a type key action, a type bar, a key lever, a pivot rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said key lever pivot rod beside its key lever, an accelerating linkage operatively connecting the type bar and vibratory lever, a reversely breaking actuating connection comprising an actuating lever, a fulcrum trip lever and a roller trip operatively connecting the key lever and vibratory lever .I: method oi use of a moving the. type bar to printing point upon depression of the key lever, means reversely breaking said connection after printing impact of the type bar for returning the type l to normal po ition while key lever is pos ion.

y action, a type bar, a key 'J lever, a pivotal rodfor therear end of sa1d key lever, an angular vibratory lever loosely mounted on said key lever pivotal rod beside its key lever, an accelerating linkage operalively connecting the type bar and vibratory level, a reversely breaking actuating conned tion comprising an actuating lever, a fulcrum trip lever and a roller trip, operatively connecting the key lever and vibratory lever moving the type bar to printingpoint upon depression of the key lever, means reversely breaking said connection after printing impact of the type bar for returning the type bar to normal position While the key lever is in depressed position, means restoring said reversely breaking actuating connection to normal operative position upon release of the key lever.

5. In a type key action, a type bar, a key lever, a pivotal rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said key lever pivotal rod beside its key lever, an accelerating linkage comprising a plunger link, a sleeved link includ ing an accelerating spring about the circumference of said plunger link operatively connecting the type bar and vibratory lever, a reversely breaking actuating connection operatively connecting the key lever and vibratory lever moving the type bar to printing point upon depression' ot the key lever, means reversely breaking, said connection after printing impact of the type bar for returning the type bar to normal position While the key lever is in depressed position.

6. In a typewriter key action, a type bar, a key lever, a pivotal rod for the rear end of said key lever,an:a'ngular vibratory lever loosely mounted on said key leverpivot rod beside its key lever, an accelerating linkage comprising a plunger link, a sleeved link .in-' cluding an accelerating spring coiled about the circumference of said plunger link operatively connecting the type bar and vibratory lever, a reversely breaking actuating connectioncomprising an actuating lever, a fulcrumtrip lever and a roller trip operatively connectin g the key lever and vibratory lever moving the type bar to printing point upon depression of the key lever, means reversely breaking said connection after print ing impact of the type bar for returning the type bar to normal position While the key lever is in depressed position.

'4'. In a typewriting machine, a type bar, a

key lever, a pivotal rod for the rear end of i beside its key lever, an accelerating linkage comprising a plunger link, a sleeved link 1ncluding an accelerating spring coiled about the circumference of said plunger link operatively connecting the type bar and vibratory lever, a reversely breaking actuating connection comprising an actuating lever, a fulcrum trip lever and roller trip operatively connecting the key lever and vibratory lever moving the type bar to printing point upon depression of the key lever, means reversely breaking said actuating connection after printing impact of the type bar, for returning the type bar to normal position While the key lever is in depressed position,-means restoring said reversely breaking actuating connection to normal operative position upon release of the key lever.

8. In a typewriting machine, a type bar, a key lever, a pivotal rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said key lever pivotal rod beside its key lever, anaccelerating linkage comprising a plunger link, a sleeved link in cludingan accelerating spring coiled'about the circumference of said plunger link operatively connecting the type bar and vibratory lever, a reversely breaking actuating connection operatively connecting the key lever and vibratory lever moving the type bar to printing point upon depression of the key lever means reversely breaking said connection; after printing impact ofthe type bar for returning the type bar to normal position while the key lever is in depressed position, means restoring said reversely breaking actuating connection to normal operative position upon release of the key lever.

9. In a type key action, a type bar, a key lever, a pivotal rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said key lever pivotal rod beside its key lever, an accelerating linkage operatively connecting the type bar and vibratory lever, a rearwardly extending arm intermediate of said vibratory lever providing a saddle-backed seat, a reversely breaking actuating connecting comprising an actuating lever, a fulcrum trip lever, and a roller trip operatively connecting the key lever and vibratory lever, an interlocking hump provided by the angular vibratory lever operatively interlocking the roller trip within said saddle-backed seat of the angular vibratory lever moving the type bar to printing point upon depression of the key lever, means tripping th roller trip out of operative interlocked position within said saddle-backed seat reversely breaking said connection after printing impact of the type bar for returning the type bar to normal position while the key lever is in depressed position, means restoring the trip lever and" roller trip to normal operative position within said saddle-backed seat upon release of the key lever.

10. In a typewriting machine, a type bar, a key lever, a. pivot rod for the rear end of said :ey lever, an angular vibratory lever loosely mounted on said key lever pivot rod beside its key lever, a reversely breaking actuating connection operatively connecting the type bar and vibratory lever, an accelerating linkage comprising a plunger link operatively connecting the vibratory lever, an accelerating spring coiled about said plunger link, a fixed collar carried by the plunger link arresting the rear end of said accelerating spring, a sleeved link, the rear portion thereof providing a sleeve slidable about the forward end of said plunger link forming a slidablejoint operatively connecting the plunger link and sleeved link, the rear end of said sleeve communicating with the forward end. of said accelerating spring and the forward end of said sleeved link operatively connecting the type bar moving the type bar to printing point upon depression of the key lever, means reversely breaking said actuating connection after printing impact of the type bar for returning the type bar to normal position while the key lever is in de presse versely breaking actuatin connection to normal operative position upon release of the key lever.

11. In a typewriting machine, a type bar, a key lever, a pivot rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said key lever pivot'rod beside its key. lever, a reversely breaking actuating connection operatively connecting the key lever and vibratory lever, an accelerating linkage comprising a sleeved link, a

plunger link, the forward end thereof slidable through said sleeved link, an accelerat-- ing spring c oiled about said plunger link, a fixed collar carried by said plunger link ar resting the rear end of said spring, the forward end of said spring contacting with the sleeved link accelerating the movement of the type bar to printing point upon depression of the key lever, means reversely breaking said actuating connection after printing impact of the type bar for return ng the type bar to normal position while the key lever is in depressed position, said spring absorbmg the recoil momentum oi. the type bar neuralizing the accessive recoil percussion oi": the latter with said type cushion rest, means restoring said reversely breaking actuating connection to normal operative position upon releaseof the key lever.

12. Ina typewriter machine, a type bar. a key lever, a pivot rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said key lever pivot rod beside its key lever, a reversely breaking actuating connection operatively connecting the key lever'and vibratory lever, an accelerating linkage operatively connecting the type bar" and vibratory lever comprising a slidable link and a plunger link with its rear end connecting to the upper end of the vibratory lever, a shdable Joint connecting the for ward end of the plungerlink with the rear 7 accelerating linkage accelerating the movement of the type bar to printing point upon depression of the key lever, means reversely breaking said actuating connection after printing of the type bar for returning the type bar to normal position while the key lever is in depressed position, means restor ing said reversely breaking actuating con- ;nection to normal operative position upon release of the key lever.

13. In a type key action, a type bar, a key lever, a pivot rod for the rear end of said key I lever, an angular vibratory lever loosely "mounted on said key lever pivot rod beside its key lever, an accelerating linkage operatively connecting the key lever and bivra tory lever, a reversely breaking actuating connection comprising a fulcrum trip lever, -a depending arm provided by said fulcrum trip lever, a roller trip operatively interlocking said vibratory lever, an actuating lever, a bar extending across the machine above the key lever pivotally supporting -:said actuating lever, a forward arm provided by said actuating lever operatively connecting the key lever by a pin andslot connection moving the type bar to print 'ing point upon depression of the key lever, a fulcrum trip bur provided by the fory ard edge of said actuating lever communinting with the fulcrum trip lever arm reversely breaking said actuating connection after printing impactof the type bar for returning the type bar to normal position while the key lever is in depressed position, a,

return bur provided by the rear edge of said actuating lever communicating with the rear edge of the fulcrum trip lever arm restoring said reversely breaking actuating connection to normal operative position upon release of the key lever. V

Id. In a key action for a typewriting machine a type bar, a key lever, a pivot rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said key lever pivot rod beside its key lever, an accelerating linkage operatively connecting the type bar and vibratory lever, a reversely breaking actuating connection comprising an actuating lever provided with a fulcrum trip bur and return bur at its forward and rear edges operated by the key lever, a fulcrum trip lever pivotally operated by said actuatinglever, a depending trip arm provided by said fulcrum trip lever, an eyelet provided by the rear portion of the fulcrum trip lever engaging about said angular vibratory lever, a roller trip comprising a wheel rotatable about an axle forming the rear end of said eyelet moving the type bar to printing point upon depression of the key ever, said, fulcruintrip lever arm communicating with the fulcrum trip bur reversely breaking said actuating connection after printing impact of thetype bar for returning the type bar to normal position While the key lever is in depressed position, said fulcrum trip lever an i communicating with the return bur restoring said reversely breaking actuating connection to normal operativeposition upon release of the key lever.

15. In a type key action, a type bar, a key lever, a pivot rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said key lever pivot rod beside its key lever, accelerating linkage operatively connecting the type bar and vibratory lever, a reversely breaking actuating connection operatively connecting the key lever and vi-' bratory lever moving the type bar to printmg point upon depression of the key lever, means reversely breaking said actua g connection after p 'nting impact of the type bar for rethe key levers, a series of set screws corresponding in number with the buffer springs extending partly through said bufi er bar each supporting one of said springs, a loose pin within the coils of said spring, a'stop" head provided bysaid pin predeterminately communicating with the underside of the key lever at the time said reversely breaking actuating connection reversely breaks ab-.

normal operative position'upon release of the 1 key lever; I v

16. In a key action for a typewriting machine, a type bar, a key lever,a pivotrod for the rear end of said'key lever, an angular vibratory lever looseiy mounted on said key lever pivot rod'beside its key lever, areversely breaking actuating connection opera-tively connecting the key lever and vibratory lever, an accelerating linkage operatively connect-- ing the key lever and vibratory lever moving the type bar to printing point upon rela tively short depression stroke of the key le-- ver, moans reversely breaking said actuating connection before printing impact of-theeating with and limiting the backward move-- ment of said vibratory lever, a vertically disposed return spring supported by a bar extending across the rear of the machine, the upper end of. said spring operatively connect ing the vibratory lever for returning the vibratory lever to normal position of rest against said buffer bar before the type bar returns to normal position While the key lever is in depressed position, means restoring said reversely breaking actuating connection to I ment substantially coincident with the operative cycle 01 said type bar; a vibratory lever, a plunger link operated by said vibratory lever and operatively connected to the sleeved link and an accelerating spring carried by said plunger link having a coacting cycle of movement substantially independent of the cycle of movement of the type bar or the cycle of movement of the key lever; a system of reversely breaking actuating linage 'operatively connecting the key lever and vi bratory lever comprising an actuating lever, a fulcrum trip lever and a roller trip having a coacting cycle of movement substantially coincident With the operative cycle of the key lever, 21 coacting half-cycle of movement ofthe actuating lever, fulcrum trip lever, vibratory lever, plunger link, accelerating spring and sleeved link moving the type bar to printing point upon depression of the key lever, means reversely breaking said system of actuating linkage returning said vibratory lever, plunger link and accelerating spring to normal position completing their cycle of movement independently of the cycle of movement of the type bar and returning the type bar to normal position completing its cycle of movement While the key lever is in depressed position; means restoring the actuating lever, fulcrum trip lever and roller trip to normal operative position completing their cycle of movement upon release of the key lever.

18. In a type key action, a type bar, a key lever, a pivot rod for the rear end of said key lever, an angular vibratory lever loosely mounted on said ke V lever pivot rod beside its key lever, a reverse y breaking actuating connection operatively connecting the key lever and ibratory lever, an accelerating'linkage comprising a plunger link, asleeved link including an accelerating spring coiled about the circumference of said plunger link, slidable means connecting the plunger link and slidable sleeve operatively elongating the accelerating linkage actuating a full response stroke ofthe type bar to printing point upon a relatively short depression stroke of the key lever, means rcverse'ly breaking said actuatlng connection after printing impact versely breaking actuating connection to normal operative position upon release of the key lever.

Signed at Fort Gollms, 1n the county of Larimer and State of Colorado, this 24th day of Jan. A. D. 1928. I

ORVILLE U. DESI-IA.

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