US1765326A - Key action for typewriters and other machines - Google Patents

Description

June 17, 1930.

0. u. DESHA KEY ACTION FOR TYPEWRITERS AND OTHER IACHI NES Filed Jan. 27, 1928 2 Sheets-Sheet 1 2 P 7//r//////// I June 17, 1930. o. u. DESHA 1,765,326

KEY ACTION FOR TYPEWRITERS AND OTHER MACHINES Filed Jan. 27, 1928 2 Sheets-Sheet 2 Patented June 17,1930 7 s ear rice ORVILLE U. DESI-IA, F FORT COLLINS, CULOEADO, ASSIGNOR OF ONE-FIFTH TO THE DESI-IA TYPELEX TRUST ESTATE, 0F FORT COLLINS, COLORADO Application filed January 27, 1928. Serial No. 249,878.

' In regard to certain more specific features thereof, my invention relates to improve ments in the associated and coasting parts of a key action and mechanism, comprising coacting means alternatively interlocking and disinterlocking the interpositioned parts connecting the type bar and key lever-the coacting incident of operatively interlocking the intermediate mechanism moving the type bar toprinting point upon depression of the key lever and an alternative disinterlocle ing of said means returning the type bar to normal position While the key lever is in depressed position; also including coacting means for restoring said disinterlocked elements to normal operative interlocked position upon release of the key lever, as a contradistinction between previous devices comprising actuating means at all times operative connectin the type bar a'nd key lever to move, the type bar to printing point upon depression of the key lever and means actuat ing said connection to return the type bar to normal position after the printing impac While the key lever is in depressed position, the latter broad ob ect being the subject matter ot'an application filed by me November th, 1923, Serial No. 672,871, uponwhich Patent 1,65%,203 issued Sept. 20, 1927. "lhe applicant also endeavors to point out a clear distinction between this and his 7 copend'ing applications Serial No. 55,227 filed September 8, 1925 and Serial Nos. 178,883, We s-i, 178,085, 178,088, 178,087, 178,088 and 178,089 filed March l, 192T. i I i i Among the objects of the present inven-v tion the applicant has endeavored": First, to improve the enacting parts between the key lever and type bar which vVlllPl'OVlClfi, an'iong other features, a keyacti which will be eilicient in use, rapid,'1"eliabie and silent in operatiomand which shall have a light touch for operating the type bars, and reduce the liability or the type to collide or pile when operated at high speed. Second To providea key mechan sm of the abov'echara'eter having few parts simple in construction Whicl'i will becheap to n'ianutaeture, conveni'ent and easy to arranger'and assemble compactly, and construct a key mechanism as to be but little likely to get out of order in usual operation. My invention, accord in Qly, consists in certain combinations of elements, features of construction, and arrangement of part-s, that may readily be incorporated in certain typewriting machines with only slight modification of the structural features of said machines as they now exist, exemplified inthe construction hereinafter set forth, which Will be more readily understood from an inspection of the accompanying two sheets of drawings and the following specilication, the scope of the invention being indicated in the appending claims.

Myinvention 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 typewriter. ,It should be understood,however,

that the invention is notrestricted to use ina machine of this type, butmay be employed Wherever found available. I

Theapphcant 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 whowould make or use the device, sui'licient to satisfy the requisite of this application, Without enumerating every obvious object and advantage, or pointing out all the diiiiculties and troubles wvliicli' are 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: I lea sectional elevation of a typevvritingmachine 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. Ill, represents a View of the key action similar to Fig. I, the key lever being shown depressed and responding the type 'Fig. II, is'a greatly enlarged sectional View of the reversel breakineroller tri 3 con lin hereinaf er describfid. Fig In is a key mech' anism similarto Fig. I, the key lever being shown in a depressed position and the type bar responding to printing position.

I, the key lever being shown in a depressed 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 the type bar will complete its incident of response to effect the printing and move out, of engagementwith the platen and con plete its. cycle of movement regardless of whether or not the k y lever is released, thus relieving the key lever of work during the impact printing operation.

lowing detailed description sets inc I forth the best mode in which the applicant has contemplated applying the invention. lit is understood, of course, that for the sake of clearness and to avoid complication of drawings, elements of the complete machine already known'to the art, constituting no part of the present invention, and statements of mere obvious facts, are omitted. In the ac companying drawings similar reference characters indicate corresponding parts in the 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, the corresponding parts in the several views of my copending applications. referred to above. n the embodiment in Fig. I, more in detail, in which one form of type action is shown as applied to a typew 'i'ting machine to which it is particularly adapted, 1 indie tes the typewriter frame1indicating the front and 1 the rear. 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 carriage mechanism forms no part of the presentinvention, specific disclosure and description thereof is omitted, asits broad function is well known. 5 indicates one of a series of type bars being radially arranged in a curved row about the same center and are movable about their fulcrum pivot rod 9 on atype bar segment 10, Fig. Lfroin a horizontal or forwardly extending radial position E as the type 7 forms the arc of vibration G and'is brought iinst the front face of plateno to a common printing point A, to an upright radial position as shown by radius F. 12 indicates one of a series of key levers carrying atthe frontend linger key 13, the rear end pivoted at 14 to bar l in the rear of the machine. and is kept normally in 1ts elevated position by the usualspring 15 supported by bar 15, at normal rest the keylever bearing against the underside of the buffer bar 30 abovethe key lever 12. The key lever 12 is formed with any upward curved arm 16 convened hackwardly 16 and concaved'forwardly in the forward concavity thereof provid- Fig. IV is also a key mechanism similar to Fig;

ing an operative plane, forwardly of said armthe key lever, limiting the downward move-- ment of the latter. 18 indicates one of a series of rearwardly disposed vibratory levers corresponding in number with the type bars 6 and key levers 12. Forward ends of the vibratory levers l8 pivoted at 19 suppor ed by a bar 20, Fig. 1, extending across the machine near the front of the latter. 21 indicates a forward pull link, rear end thereof operatively connecting the type bar 6 at 6 and the forward end operatively connecting the vibratory lever 18 at 18. 21 is a fixed stop collar near the center of the forward pull link 21, and 21 is a spring support fixed near the rear end of said pull link 21. Said stop collar 21 and support 21 being preferably integral with said pull link. 22 indi cates a depending trip lever operatively connecting the vibratory lever-'18 at 25 intermediately the ends of the latter, and extends downwardly, and operates radially in a plane above the key lever. 24: indicates a trip roller bob carried by the lower end of the depending trip lever 22 operating within the forward concave plane provided by the upward curved key lever arm 16, said trip roller bob communicating and operatively interlocking with. the roller grip 26. carried by said key lever arm 16. It is necessary that depending trip lever 22be of such length and of such form as to permit the normal position of the roller grip 26 to operate between the pivotal connection 25 and trip roller bob 2st that said trip roller bob 24 may cross and recross a reversely breaking line 5 J drawn from pivot 25 diametrically through roller grip 26, thereby permitting the elements of'said re: versely breaking roller trip coupling to be interlocked, Fig. l, moving the type bar 6 to printing point upondepression of the key lever and said parts trip out of interlocked position, Figs. ll, HI and IV, I while the type bar returns to normal position; the characteristic form of the depending trip lever 22 being preferably convened forwardly and the upper part beingstraight. The

roller grip 26 is spoolshaped comprising a roller head and roller head 26 on either side of the dependingtripjlever 22. F 11.

One of the roller heads, 26 provides a hol-' low cylinder hub 26 forming the pivotal" roller bob 24 is identical to that of the roller grip 26, F 1g, Il except that it is'preferable therefore is mixtilineal, the lower part;

that the trip roller bob 24 be relatively smaller diametrically than the roller grip 26, the difference in diametrical size enables the small trip roller bob 24, to more readily move to the rear of the aXle 26 of the roller grip 26, thereby enabling the latter to more firmly grip the trip roller bob 24 in operative interlocked position, as shown in Fig. I. 27 is a pull wire spring, the forward end thereof supported by the slidable sleeve 28. the rear end supported by a fiZ-IBCl support 21 This spring is hereinafter described as a return spring. The return spring 27 moves bodily with the actuating parts intermediately of the type bar and vibratory lever, the,

tension of said spring being dormant or inoperative allows momentum to accelerate the movement of the type bar to prinitng point unrestrained by the tension of said spring upon relatively light depression strokeof the key lever, the latter being also relieved of energizing said spring while operating the type bar. 28 is an actuating thrust rod, the rear end thereof is pivoted at 28 to a slidable sleeve 28 28 carried by the forward pull link 21, and the forward end of said actuating thrust rod 28 is pivoted at 28 to the depending trip lever 22 intermediately the ends of the latter? The slidable sleeve is formed with an aperture or space between the two slidable parts 28 and 28 exposing a part of said forward pull link between said slid able parts with an integral connection 28 connecting the slidable parts 28 and 28 beneath the exposed part of said forward pull link. The stop collar 21 is fixed on said forward pull link between the slidable parts 28 and 28 of said sleeve, the slidable parts 28 and 28 of said sleeve alternately communicating with said fixed collar within said aperture.

It is important that perfect operative alignment of the enacting treads of the respective trip roller bob 24 and roller'grip 26" be maintained, therefore, 29,.Fig. III, indicates a toothed guide. extending across the front part of the machine comprising a series of horizontally disposed teeth 29 corresponding in number with the vertically disposed teeth 29*.

The lower part 22 of the depending trip lever operates between two of said. horizontally disposed teeth, and the key lever 12 operating between the two corresponding vertically disposed teeth. This toothed guide, therefore, at all times effects perfect operative alignment of the coacting treads of the respective trip roller bob 2% and roller grip 26. 30 is a return buffer bar supported within the lower angle of the toothed guide 29 preadjustable by a screw 30 in a slot 30 at either end of the toothed guide; said buffer bar being preferably an intricate part of the key lever stop 30*. The rear face of the buffer bar 30 is provided with a noise absorbing cushion deadening the impact percussion when struck by the front edge of the lower part 22 of the depending trip lever 22 limiting the forward movement of the latter, the

function of the buffer bar hereinafter being more fully described.

The new mechanical structure, combination of parts and operation thereof are the important factors of the invention in providin g the desired function of the key action, a further description of the operative principle, therefore, follows:

Thekey 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 in cident of depression is disclosed by the movement of the key lever 12 from radius B to radius C, and the incident of release is dis closed by the movement of the key lever 12 back from radius C to radius B. bar 6 is described as having two incidents of operation, before completing its operative cycle, namely: the incidentof response and incident of recoil. The incident of response of the type bar 6 is disclosedliy the movement of the type bar from its initial rest radius E to printing}; point A, at radius F, formingarc G from pivot 9. The incident of recoil of type barb is disclosed by its movement from the 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 to C, 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 connection, but the broad function inherent to the present key action relative to thecorrelation of incidents of operation of the key lever with that of the type bar is in providing the operative expedient by which both the incident of response,'E to A, of the type bar and the incident of recoil, A to E, occur during the one incidentof depression, 13 to C, of the key The type i lever, the type bar completing its'operative In this case it will be observed that the oper alive cycle of the vibratory lever 18 and that of the forward pull link 21 are simultaneous with the operative cycle of the type bar, and

the operative cycle of the depending trip position while the key lever is in depressed position the detail mechanism of said coacting roller trip later described as disclosed in Fig. 11*. Upon a rapid operation of the key lever, the alternative disengagement of the elements of the reversely breaking roller trip coupling 24: and 26 permits momentum 'to carry the type bar 6 from its normal position E relatively faster than its corre'sponding key lever allowing the type bar 6 to complete its incident of response, E to F and return from F to E by the time the key .lever completes its incident of depression B to C and stopped by the key lever rest 17. In other words the recoil impact of the type bar at the type bar rest 11 is substantially simultaneous with the impact of the key lever at 17, the type bar completing its cycle of movement while the key levers cycle, of movement is only half complete. In order to accelerate the rapid response and recoil of the type bar by overcoming gravity, the weight 01" the intermediate mechanism is utilized to counterbalance the weight of the type bar by prearranging the point of disconnection as nearthe key lever as possible.

A further description et-the key action follows: Dotted line M M, indicates the correlative relationship of the elements otth'e reversely breaking roller trip coupling during process of operation, namely. dotted line M M, Fig. I, shows where the actuating thrust rod 28 by means of spring 27 holds the depending trip lever 22 normally in operative interlocked position with the key lever arm 16. In normal position the trip roller bob 24, at the lower end of the depending trip lever 22, is interlocked behind a reversely breaking line J J drawn through the upper border pivot 25 of the actuating plane thence downward diametrically through the roller grip 26. At this stage of operation it will be seen that the roller grip 26 carried by the key lever arm 16 is within the backward concavity of the depending trip lever 22. This position operatively interlocks the elements 24 and 26 of said reversely breaking roller trip coupling effecting response of the type bar 6 upon depression of the key lever. Dotted line M M, Fig. ll, shows where the actuating thrust rod 28 by means of its supfixed collar .21, has diverted the downward movement of the depending trip lever 22 forwardly and has thereby moved the trip roller bob 24 forwardly across and in front of the rcversely breaking line J J, the elements otthe reversely breaking roller trip coupling assuming this position about the time the type balm; responds to about one-halt oil its incident of re rouse, as shownby Ea in Fig. ll the momentum of th type b r completirigthe incident or .sponse of the latter to printing point a, as shown in Fig. Ill- At this stage of operation it will be seen thatthe roller grip is without the backward concavity of the depending trip lever The ctlon of the coacting' lever roller trip ments .Zand 26 from their normal position Fig. l. to the position shown Fig. H is unitary i. e. these elements each revolves on its axis in unison as it they formed a link instead of taeir treads rolling togethentheir pivotal movement minimizinnfriction and lessening wear. Dotted line M M, Fig. Ill

shows where he actuating thrust rod 28 has J J, the treads of the roller .1 being disengaged or disconnected. Dotted lino M Mpl ig. IV, shows .where the actuating thrust rod 28 has diverted t downward moven'ient ot the 'de pending trip lever 2 forwardly and moving the trip rol. bob 24.- forwardly and upward ly in front of the r 'erscly breaking line J J, permitting the type bar 6 to recoil while the key. lever remains in depressed position In a reversely braking key action it is desirable that means he provided whereby the key lever may have a relatively short depression stroke for actuati a full response stroke of the type lit to printing point. Inherent to the present reversely breaking tey action the type bar being unrest ained by the absence of a l' silk conne key lever. m n ntuin carries the type bar 6 to theprinting point A with efiicacious i1npression upon arelatively short depre: ion stroke of the ke lever a contradistinction between the rigid or link connection between the key lever and type bar of llOlQl'QX QlSQlY breaking keys. '5 his operative expedient is accomplished inns case by the ahfernative disenga ement of t re elements of said reversely breaking roller trip coupling in the following manner: Ey e .erring toFigs. I and II, it will be seen that the normal operative position of the treads ot the coacting roller trip elements '7 'wardly away from the reverselv ion between it and the operation the key lever has reached the limit of its depression strokc,.the' latter being stopped by the key lever arrestor 17, and the momentum of the type bar continues the movement of the latter to printing point. The type bar (3, of the present invention therefore, may be operated with about onefourth of an inch to three-eights an inch stroke of finger key 13 contrasted with the usual iive-eights of an inch inherent to a non-reversely breaking key action. I

Inherent to the common noiseless key mechanism, the printing operation is formed by pressure incontradistinction to impact; and the time actually used in making impression by pressure is usually relatively longer than that required by the impact of a type with its movement accelerated by momentum. The generic structure of the present keymechanism, therefore, is similar to that which forms the printing operation by impact, however, the applicant endeavors to provide a type action in this case which may coordinate inherent rapidity of operation with inherent silence of impression. In other words, coordinate the inhe out qualities of a noiseless key action with the inherent qualities of a rapidity characterized by efficacious impact.

This operative expedient is accomplished by,

the buffer bar 30 arresting the forwardly diverted movement of the depending trip lever 22 and in turn stopping the forward thrust of the actuating thrust rod 28 and the actuating thrust rod 28 stopping the forward movement of the slidable sleeve 28 which in. turn communicates with the forward end of the lined stop collar 21 preventing further actuating movement of the forward pull link 21. The actuating movement of the intermediate elements may be limited by the buffer bar 30 set to arrest the forwardly diverted movement of the depending trip lever 22 just before the type 7 strikes the platen at printing point A, the inherent resiliency of the buffer bar 30 thus absorb the momentum of the type bar, permitting the latter to complete its sector of movement with coordinate rapidity and silent impression, disclosing the first function of said buffer bar.

The applicant also endeavors to provide 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. It will be'seen that the energy manifested by the tension strain under" which the intermediate mechanism between the type bar and key lever is subjected to incident of response, disclosing the second function of the buffer bar 30.

However, where there is no connecting means to retard the recoil of the type bar, and its recoil is further accelerated by the second function of the bu tier bar 30, described above, the excessive recoil percussion of the type bar with the cushion rest 11 is also inherent to a reversely breaking roller trip coupling. The applicant, therefore, endeavors, in this case, to provide a key action whereby 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: By referring to II, it will be seen that while the key lever 12 remains depressed, the recoil of the type bar relieves the tension strain upon the intermediate parts occasioned by the buffer bar 30 absorbing the mon'ientum of the type bar, permits the depending trip lever 22 to again partially recoil carrying with it the trip roller bob back in treadle contact with the roller grip 26, and retards the depending trip lever 22 at its forwardly divertic position. in turn the actuating thrust rod 28, by means of the slidable sleeve 28?28 retards the forwardend of spring 27, and tire type bar 6 continues to recoil, Fig. IV, it in turn continues topull the link 21 baclrwardly, and, by means of the fixed spring su port 21 carried by said forward pull link, the recoilof the, type bar expandsor energizes said spring 27. It this process of energizing the splin 27 which counterbalances the mayor p:

energy of the type bar 6, thereby neutraliz-' ing the recoil percussion of the type bar contacting with the cushion rest 11, disclosing the first function of return spring 27. o

By referring to Fig. IV, it'will be seen that while the key lever is held depressed the coacting treads of the trip roller bob 2% and the roller grip 26 are disinterlocked yet are in a communicative position and the rear slidable part 28 of the slidable sleeve is in communication with the stop collar 21*, this position prearranged to also absorb the ex cessive recoil percussion of the type bar 6 occasioned by its contact with the cushion rest 11. p

it is equally important that reliable and rapid means be provided for restoring the elements 2% and 26 of the reversely breaking roller trip coupling to normal operative position upon release of the hey lever. This is accomplished by the second function of the return spring 27 in the following manner: it will be noted, in Fig. IV, that the recoil of the type bar 6 to normal position, by means of the forward pull link 21 and fixed support 21 moving backwardly, has expanded or energized the return spring 27 and the fixed stop collar 21 carried by the forward pull link 21 has moved backwardly away 't of the recoiling from the slidable sleeve 28, and upon release of the key lever 12, as shown in Fig. l, the energy of return spring 27 moves the slidablo sleeve 28 backwardly against the fixed collar 21 and simultaneously the actuating thrust rod 28 pulls the depending trip lever 22 backward arrdagain interlocking the trip roller bob 2% with the roller grip behind the reversely breaking line J J. it will be seen that should the key lever be released before the type bar has recoiled, the return spring 27 would still effect the interlocked posit on of the element." 24 and 26 the reversely breaking coupling and no matter how successively rapid the key lever may be operated the return spring 2? restores the alternatively disinterlocked elements to normal operative interlocked position equally as rapid.

Finally it will be seen that the present invention provides a simple and practical type action which will be rapid and etiieient in use, accomplishing, among others, all of the objects and advantages above set forth, therefore the operation and method of use of a type action of this character is believed to be perfectly clear from the above description, a reiteration thereof is believed to be unnecessary. As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made 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 limiting sense, and variations may be resorted to within the scope of the invention, and portions of the improvement may be used without others.-

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a key action for typewriter and other n'iarhines, type bar, a. rearwardly disposed vibratory lever pivotedly supported by a bar extending across the front of the machine, means opcratively connecting the type bar and vibratory lever, a depending trip lever actuating said vibratory lever, a :ey lever, an upward curved arm intermediate the ends of the key lever forming an integral part of t 1e latter and said arm convexed backwardly and concaved forwardly, a reversely breaking roller trip coupling comprising a trip roller bob supported by the depending trip lever, and a roller grip supported by the key lever arm, the forward concavity of said arm providing an operative plane forwardly thereof and above the key lever for the operation of said trip roller bob for operatively interlocking the elements of said roller trip coupling moving the type bar to printing point upon depression of the key lever, means disinterlocking said coupling and simultaneously re turning the vibratory lever, type bar and immediate connection to normal operative posi tion while the key lever is, held depressed, means restoring said disinterlocked elements to normal operative interlocked position upon release of the key lever.

2. In a key action for typewriting machine, a type bar, a key lever, a rearwardly disposed vibratory lever, the forward ends thereof pivotedly supported by a bar extending across the machine near the front of the latter, the operative cycle of said vibratory lever being simultaneous with the operative cycle of the type bar, means operatively connecting the type bar and vibratory lever comprising a forward pull link, a reversely breaking roller trip coupling operatively interlocking the depending trip lever and key lever moving the type bar to printing point upon depression of the key lever, a slidable sleeve carried by said forward pull link, an actuating thrust rod operatively connecting said sleeve and depending trip lever reversely breaking said roller trip mechanism after printing impact of the type bar for returning the vibratory lever, forward pull link and type bar to normal operative position while the key lever is in depressed position, means restoring said disinterlocked elements to normal operative interlocked position upon release of the key lever.

in a ty 'iewriting machine, atype bar, a key lever providing an integral arm curved upwardly and forwardly, a rearwardly disposed vibratory lever in front of the-machine, a trip lever operatively depending fron'isaid vibratory lever, a reversely breaking roller trip coupling operatively interlocking the depending trip lever and key lever arm, a forward pull link connecting the type bar and vibratory lev 1' moving the type bar to printing point upondepression of the key lever, an actuating thrust rod supported at its forward end by the depending trip lever intermediately th ends of the latter, a fixed stop collar near the center of the forward pull link, a slidable sleeve carried by said forward pull link reverse-1y breaking said roller trip coupling for returning the vibratory lever, forward pull link and type bar to normal operative position while the key lever is in depressed position, means restoring said disinte locked elements to normal operative interlocked position opon release,

of the key lever.

i. In a key action, a type bar, a key lever formed with an upward arm, a vibratory lever rearwardly disposed, a forward pull link operatively connecting the type bar and vibratory lever, a d pending trip lever actuatinn said vibratory lover, a reversely breaking roller trip coupling moving the type bar to printing point upon depression of the key lever, a slidable sleeve carried by said forward pull link comprising two slida-ble parts with an aperture between said slidable parts, an integral sleeve bar connecting the slidable parts of said sleeve, an actuating thrust rod connecting the integral sleeve bar and depending trip lever, a fixed stop collar carried by said forward pull link between the slidable parts of said sleeve, the forward slidable part of said sleeve communicating with-said fixed collar within said aperture diverting the downward movement of the depending trip lever forwardly reversely breaking said roller trip coupling after printing impact forreturning the type baivto normal position while the key lever is in depressed position, the rearslidable part of said sleeve communicating with said fixed stop collar withinsaid aperture absorbing the excessive recoil percussion of the type bar occasioned by its contact with its normal cushion rest, means restoring said revers'ely breaking roller trip coupling to normal operative interlocked position upon release of the key lever. a v 1 l r in a type key action and mechanism, a key lever formed with an upward arm supporting a roller grip, a rearwardly disposed vibratory lever, means operatively connecting the type bar and vibratory lever, a depending trip lever operatively connected at its upper end to said vibratory lever intermediately theends of the latter extending downwardly and operating ina plane above the key lever, said depending trip lever being min ilineal in form, the upper part being straight and the lower part convened forwardly, the lower end thereof supporting a trip roller bob operatively interlocking with said roller grip moving the type bar to printing point upon depression of the key lever, means divertingthe downward movement-of said trip lever forwardly reversely breaking said roller trip coupling after printing impact of the type bar for returning the vibratory lever and type bar to'norma'l position while key 7 lever is in depressed position, means restoring said disinterlocked elements to normal operative interlockedposition upon release of the key lever. v,

6. In a key action and mechanism, a type bar, a key lever with an, upward angular arm intermediate of its ends, a rearwardly disposed vibratory lever, a-forward pull link operatively connecting the type bar and vibratory lever, a depending trip lever operating said vibratory lever, a trip roller bob pivoted to the lowerend of the depending trip lever, a roller grip carried by said key lever arm spool shaped with roller, heads on either side of the depending trip lever, one of the rollerheads providing a hollow cylinderhub forming a pivotal axle operating in 'a hole at the upper end of the key lever arm and the other roller head providing a cylinder pin tightly shrunk in said cylinder hollow hub, said roller grip operating within the backward concavity of the de pending trip lever, operatively interlocking the elements of said roller trip coupling, moving the vib 'atory lever downwardly and the forward pull link forwardly thereby moving the type bar to printing point upon depression of the key lever, a slidable sleeve carried by said forward pull link communicating with a fixed collar on said pull link, an actuating thrust rod carried by said sleeve and depending trip lever diverting the clownward movement of said depending trip lever forwardly and swinging said trip roller bob forwardly and upwardly said roller grip movin out of the backward concavity 0f the depending trip lever rcverselydisinterlocking the elements of said roller trip coupling for returning the vibratory lever, forward pull link and type bar to normal operative position while the key lever is in depressed position, means restoring said disinterlocked elements to normal interlocked position upon release of the key lever;

7. In a key action, a type bar, a key lever, arearwardlyl disposed vibratory lever, means operatively connecting the type bar and vi bratory lever, a depending trip lever operating the vibratory lever, a trip roller bob carried by the lower end of the depending trip lever spool shaped with roller heads on either side of the depending trip lever, one of the roller heads providinga hollow cylinder hub forming the pivotal axle operating in a hole at the lower end of the depending trip lever and the other roller head providing a cylinder pin tightly shrunk in said hollow cylinder hub, said rollerbob operating within the forward concaved plane provided by the upward curved key lever arm,communicating with and operatively interlocking with said roller grip behind a reversely breaking line drawn through the diametrical roller grip constituting a coupling for moving the type bar to printing point upon depression of the key lever, means reversely breaking said roller trip coupling after printing impact of the type bar for returnin the type bar to normal posit-ion While the key lever is in depressed position, means restoring said disi-nterlocked elements to normaloperative interlocked position upon release of the key lever.

8. In a type key action, a key lever having an upward curved arm, a key lever rest under said key lever, a type bar, a vibratory lever, means opera-tively connecting the-vibratory lever and key-lever comprising a depending trip lever actuating said vibratory lever,a

reversely breaking roller trip coupling comprising a relatively lar 'e roller grip carried by the key leverarm and a relatively small trip roller bob carried by the depending trip lever with their treads communicatively in terlocked, the difference in diametrical sise of said coacting elements enabling them to more firmly engage in operative interlocked posi verting' the downward movement or i pending trip lever and trip roller bob fortion for moving the type bar to printing point up n depress'ni of the key lever, means diverting the movement of said depending trip over forwardly, disinterlooking the coacting treads of the roller trip coupling, permitting the momentum of the type bar to carry the latter to prii ting point with a relatively short depression stroke of the key lever limited by a key lever rest means restoring coacting treads of the elements 01" the reversely breaking roller trip coupling to normally operative interlocked position upon release of the key lever. V

, 9. In a type key action, a type bar, a lover, a rearwardly disposed vibratory lever pivoted at its forward end, a forward pull linkoperatively coi'inecting the type bar and rear end of the vibr y lever, a reve' y breaking roller trip coupl g operatively interlocking the depending t ip lever and ey lever arm comprising a roller grip and a trip roller bob oper tively i1 rlockedior mov ing' the type bar to the riing point upon depression of the hey lever, an actuatii thrust rod, a slidable sleeve carried by the forward pul linl: t which the rear one. of the thrust rod is pivoted. and the forward end oi said actuating thrust rod be pi" QJil to the depending trip lever into ,odiately the LA ends of the latter diverting the downward movem nt of the degending trip lever for- --a'ardly movi and upwardly inn line drawn roller grip perini While key lever said ricallythro ing' trip lever an l operative osition lever. s

10; In a typcwriting machine, a hey lever having an upwardly exten i v a vibratory lever,1neans operatively C'QA' ing the type bar and vibratory lever,'a lever for actuating the vibratory lever, a versely breaking roller trip co": prising a trip roller 1 bob carried by the delever and a roller grip carried U ever arm 'oporatively ii terloel; ed

for noving the type to printing upon depression of the key lever, me

wardly 'diuinterlochingsaid roller trip elements, a butler bar extendir 1 the inachine in front otsaid dependins" tr' e'noise absorbing cushion provided by the lower face of said buli'erbar connnunicatine With the upper edgeo'f the key leverlm mg it deadbutler bar to arrest thefor ardly diverted rinovement of the depending trio lever ust besaid a effecting operative alig treads of the respective trip roller hob and fore the type bar strikes the printing point, the inherent resiliency of said butler bar absorbing the momentum oi the type bar transmitted throughtiie intermediate mechanism permitting the type bar to complete iaLS sector of movement coordinatin inherent rapidity of operation with inherent silence of impression, means reversely breaking said roller trip mechanism after printing impact of the type bar, the second function of said buil'er bar effecting a relativelyquicker incldent of recoil of the type than its incident of response for returning the vibratory lever and forward pull link to normal operative position while the key lever is in depressed position, means restoring said disinterlocked elements to normal operative interlocked position upon release of the key lever.

ll. In a key action, a type ha a forward pull linh actuaing said type bar, a vibratory lever actuating said forward pull link, a depending trip lever actuating said vibraorylever, a key lever with an integral arm pwardly curved, reversely breaking roller L number with a series of vertically disposed i teeth, the lower part 01 the depending trip lever operating between two of said horizontally disposed teeth and the key lever oper ting bet veen the two corresponding vertically disposed teeth restoring sail depem ingtrip lever to its normal, operative position nment of the coacting roller grip upon release of the hey lever;

12. In a type key action and mechanism, a

type bar, arearwardly disposed vibratory lever, a forward pull llllK operatively con- 'ip coupling comprising a trip roller bob necting' the type bar and vibratory lever, a]

depending trip lever tory lever, a trip roller bob actuating said depending trip lever, a key lever providing an upward curved arm intermediately of its ends, aroller gripcarried by said arm oper- V atively interlockingsaid:trip roller bob movi-V V ing the type bar to'printing point upon depresslon otthe hey lever, means disinterloclz- 111%" said elements permitting; the momentum actuating said vibra-,

of the type bar to move the atter to printing point with relatively shorter depression stroke of the key lever, the type bar completing its cycle of movement to printing point and back to normal position of rest by the action of substantially the first half of the key lever cycle of movement, means restoring the reversely breaking trip roller coupling to normal operative interlocked position of rest by the action of the second half of the key lever cycle of movement.

13. In a key action and mechanism, a type bar held in normal position by a type bar rest, a rearwardly disposed vibratory lever, a forward pull link operatively connecting the type bar and vibratory lever, a depending trip lever actuating said vibratory lever, a key lever providing a key lever arm, a re- Versely breaking trip link coupling comprisin g a trip roller bob supported by the depending trip lever and a roller grip carried by the key lever arm moving the type bar to printing point upon depression of the key lever, a slidable sleeve carried by said forward pull link, an actuating thrust rod operatively connecting the trip lever and slidable sleeve, a fixed spring support carried by the rear portion of said pull link, an actuating return spring supported by said spring support and slidable sleeve, said spring moving bodily forwardly beneath said pull link, the tension thereof being dormant or ineffective permitting efficacious impact of the type bar upon relatively light depression stroke of the key lever, a fixed stop collar carried by the central portion of said pull link communicating with the forward slidable part of I said sleeve diverting the downward movement of the depending trip lever forwardly reversely breaking said coupling after printing impact of the type bar, said roller grip holding the trip roller bob and the depending trip lever in their forwardly diverted position and in turn the actuating thrust rod by means of the slidable sleeve energizing said spring by the recoil energy of the type bar neutralizing the recoil percussion of said type bar occasioned by the contact with the type bar rest, means releasing the energy of said spring slidings said sleeve backwardly effecting backward movement of said actuating thrust rod restoring the depending trip lever to normal operative position upon release of the key lever.

Signed at Fort Collins, in the county of Larimer and State of Colorado, this 24 day of J an., A. D. 1928. p

ORVILLE'U. DESHA.

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