US1688359A - Typewriting machine - Google Patents

Description

Oct. 23, 1928. 1 1,688,359

H. H. STEELE TYPEWRITING MACHINE Filed Sept. 18, 1926 2 Sheets-Sheet l lnve/rfak:

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- H. H. STEELE TYPEWRITING MACHINE Patented Oct. 23, 1928.

UNITED STATES PATENT OFF ICE.

HERBERT H. STEELE, OE LYNBROOK, NEW YORK, ASSIGNOR TO UNDERXVOOD ELLIOTT FISHER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE,

Application filed September 18, 1926. Serial No. 136,230.

This invention relates to typewriting machines, and more particularly toa powerdriven mechanism of that character where the type bars are selectively moved to typing position by mechanically driven means controllable by the operator, and in which the type-bars are restored to normal positionsindependently of the mechanical driving means and independently of the operator.

' One object of the present invention is to disconnect the keys from their associated,

type-bars and provide each key with a comparatively short stroke to a fixed stop common to all the keys, and further provide each key-lever with an interponent hangin pendent from said lever and conditione to be moved by the depression of the key-lever into the rotary path of a power-driven toothed drum, the drum causing the interponent to swing in a fixed direction about its pivot on thestationary key, and through an arc of fixed extent predetermined by the swinging of the free end of the interponent out of the radial sweep of the teeth of the drum, the interponent in its downward movement to 'the drum simultaneously effecting a toothedinterlock with an intermedial-y member to a type-bar, so that the swinging movement of the interponent derived from the drum will be conveyed through the intermediary member to the type-bar to project said type-bar from its normal position of rest to the printing position of the platen, the relation vof the sweep of the interponent to the sweep of the typebar being such that the interponent will automatically release control of the intermediary member to the type-bar in advance of the printing position and the actual typeimpact will take place under the momentum of the type-bar and its connections, the typebar thereafter being free .to react to its own forces. The rebound of the type-bar from theimpact of the types against the platenface coacts with a light restorin spring to promoteva quick, snappy typear action suitable for the fastest operator, and with practically no manual exertion in manipulating the keys. 5 Other features provide that all the keys have a uniform dip; that the power-driven toothed drum has a constant velocity; that the pendants interposed between each keylever and the drum are of uniform length and have a normal transmissive power of un1form extent; that each type-bar is actuated by an operating lever, and each lever has an intermediary'member pivoted thereto at a uniform distance from a fulcrumrod common to the whole series of operating levers, said intermediary members having unlform transmissive effects irrespective of the positions of the, ty e-bars in the segment and lrrespective 0? the leverage of the associated type-bar-operating levers; that IDClIVl dUal adjustable means are provided for each lntermediary member to predetermine the degree of coaction thereof with the drumdriven interponent, so that the position of the let-oft where the middle type-bar, with its short operating lever, is released to its momentum shall be at the same relative position where the other type-bars, having longer operating lever connections, will be released, the adjustable means including a guide to individually direct the free end of each intermediary member and determine the interval of coaction between a tooth of the intermediary member with a tooth of the associated interponent; and that individual adjustable means of this character provide for the employment of many duplicate parts, duplicate piercings in both type-bar levers and key-levers, and any slight variation inthe .intermediary member or any slight displacement of the piercings, during the course of manufacture, can be readily corrected through the adjustment of each intermediarymember to the positive drumdriven interponent on each key.

Other features and advantages will hereinafter appear.

In the accompanying drawings, 1

Figure 1 is a central longitudinal section through the standard Underwood typewriting machine, with only such parts showing that co-operate withthe new parts forming the subject-matter of the present invention.

Figures 2, 3 and 4 are enlarged fragmentary operational viewsgshowing the key and ty 'e-bar connections in progressive positions re ative to the driving drum when a key is depressed.

Figure 5 is a sectional detail view illustratin one method for preventing a joint actuation of two character-keys.

Figure 6 is an enlarged cross-section taken on a plane indicated by the line 66 of Figure 1, looking in the direction of the arrows, and

fulcrumed at 12 to a frame 13 of the machine, andheld in normal raised positions by springs'14, the key-levers being held'in verkey-lever has a stud-connection with the slot- 29, and urged in letter-space direction by'aspring-motor on the frame tical parallel planes by a front comb 15. In

an Underwood typewriting machine, each ted end of a bell-crank that actuates the type-bar, but, for the purpose of the present invention, it is desirable that this stud be removed from the key and that the key-lever shall have no. direct transmissive connection 'to the bell-cranks. To this end, each bellcrank 16 becomes a plain vertically-disposed lever fulcrumed upon a rod'17, spaced off and guided by slots in a cross-bar 18,. positioned across the machine over the key-levers. Each lever 16 at its upper free end has a pivot-stud 19 having a sliding engagement within a slot 20 in the short arm of a typebar 21 that takes a bearing upon a segmental fulcrum-wire 22 for an upward and rearward swing from a type pad 21 to the front face of a platen 23, when the lever 16 is swung 1forwardly by means other than the keyever. The platen 23 is revolubly mounted within a frame 24, hung upon arms 25 at each side thereof, and shiftable to upper and lower case positions by a shift-rod 26 operated by the usual shift-key, not shown. The frame 24 forms a part of acarriage 27, slidably mounted upon front and rear guide-rods 28 and and connected by a tape 31 to the carriage. The carriagefeeding mechanism includes a. tooth-rack 32 upon the carriage that is in train with a pinion 33 to rotate an escapement-wheel 34, controlled by feeding dogs 35 vibrated by a .universal bar 36, engageable by a heel 37 of each type-bar as the bar reaches the dotted position of Figure 1 just in advance of the typing position on the platen. With the exception of the .removal of the stud-connection between key-levers 11 and the bell-1 cranks 16, the description up to this pointfits the well-known Underwood ,typewriting machine.

At Figure 1 the type-bar shown is at the middleof the type-bar segment, and the as- "sociated actuating lever is the shortest in the series,.b ut as the type-barsascend the arc of the segment on either side of this middle type-bar, the levers will lengthen correspondingly, and, as the swing of all the type-barsf is equal, the ratio of leverage transmitted from the key-leversto the type-bars through the actuatingflevers 16 must also be equal.

This condition in the standard machine is maintained by correspondingly shifting the location of the stud on the key-lever,-that engages the slot in the short arms of the bellcranks, at increasing distances from the fulcrum-rod 17, and hence there are no two keyv levers of the keyboard exactly alike, and this nested from theactuating levers 16, the only difference between stock key-levers will be four different lengths, one length for each bank of keys.

The levers 16, mounted upon the fulcrunirod 17 assume a horizontal pivotal plane across the machine and no attempt in thepresent instance is made to distribute a leverage that varies proportionately to the length of said levers, but each lever 16 at a uniform point over the fulcrum-rod 17 is provided with a lar e headed shoulder-stud 38 proj ecting from t e side thereof to pivotally support the rearend of an intermediary member or draw-link 39 that passes downwardly between the adjoining key-levers 11, and thence forwardly under said levers to p'ass between the teeth of a spacing comb 40, secured to a crossbar 41 by screws 42. The free end of each intermediary member 39 is formed with an eye to receive one end of a spring 43, securedat the opposite end to a spring-bar 44, having grooves therein to maintain parallelism for the whole series of springs. The comb 40 also functions as side guides for the intermediary members 39, but said members have a free upand-down movement within the comb. To further direct the'intermediary members, a stud 45 is adjustably secured within holes in the bar '41, as with screws 46, the upper ends of provided with parallel faces that may be accurately fitted to the hooks 45 fora free sliding movement. The studs 45 are adjustable up and down to individually change the workiplg plane of the intermediary members, and t e the stud is turned, as shown at Figure 6, the intermediary member will be clear of the hook for assembling and disassembling purposes.

It will be noted up to this point that aforward sliding movement of any intermediary member 39 will vibrate a lever 16 forwardy to swing atype-bar upwardly, and when released from the actuating means the flexed spring 43 will restore the parts to normal positions or until the type-bar is arrested by the type-pad the type-bars normally being spring-pressed against the pad by the spring 43 to prevent unnecessary vibration of the inactive type-bars. 7

Each mtermediary member 39 is formed with a tooth 48 at the upper edge thereof to co-operate with an interponent 49, pivoted at at hook 45 may be offset, so that when the sideof each key-lever 11 upon shoulderstuds 50. These interponents or'couplers 49 are in the same plane as the associated lever 16, and hang pendent between the key-lever and the intermediary member 39. To provide means for an interlock between an interponent 49 and a tooth 48 of each intermediary member 39, a lug 51 may be secured to the side face of the interponent to assumethe same plane as the tooth 48.

' Each interponent has practically a straight up-and-down movement with its key through the engagement of the lower end of the interponent with a spacing comb 52 secured to the top face of a cross-bar 53, each interponent bearing against the bottom of a slot in the comb and held thereagainst by a spring 54 fiexed between an ear 55 at the upper end of the interponent and a spring-stud 56 on its associated key-lever.

Referring more particularly to Figure 6, a toothed driving drum 57, mounted upon a driving shaft 58, furnishes the motive power to actuate the type-bars. The length of the drum is sufficient to include all the characterkeys, and the end of the shaft projecting be yond the drum at the left hand of this figure is reduced at the end to take a hearing within a bracket 59, detachably secured to the carriage-frame 13 by screws 60. The opposite end of the shaft 58 may have a bearing with a bracket 61, secured'to the opposite side of the machine-frame by screws 62, and said bracket may form an integral part of a casing 63 that encloses an electric motor. The motor in- .cludes an armature-shaft 64 that drives a worm 65 that is in train with a worm-gear 66 fast upon the driving shaft 58 to provide a continuous rotary movement for the drum 57, said motor having a suitable rheostat control (not shown), to vary the velocity of the drum, at will, in a well-known manner. I

When any character-key is depressed, the interponent 49 is also depressed to the position of Figure 2, where the free end thereof is shown in full engagement with a tooth of the drum 57, and the lug 51 thereof is in position topick up the tooth 48 of the intermediary member 39 when motion is conveyed to the interponent by the rotating tooth of the drum. The movement of any interponent will be radial to its pivot 50 on the stationary key-lever, and, as the direction of the intermediary member 39 is practically horizontal in the direct-ion of the arrow, the lug naturally clears itself from the tooth 48 by its swing, as shown in Figure 3, where the lug in its radial sweep has reached the end of its transmissive engagement with the tooth 48. The several parts,are so proportioned that when the lug leaves the tooth 48, the type-bar is movedupwardly to the dotted position of Fi ure 1, and the movement of the type-bar rom this dotted position to the typingposition on the platen will be due to momentum to vibrate the intermediary member 39 in the direction of the arrow from the full-1ine position to the dotted-line position of Figure 3. It will be noted at Figure 3 that while the transmissive throw of the lug 51 for the tooth 48 is complete, the full effect of the tooth of the drum upon the interponent is incomplete, and said tooth in completing the throw of the interponent swings the latter to the position of Figure 4, where the interponent'passes out of the radial sweep of the teeth of the drum. The rapidly rotating teeth of the drum will hold the interponent in this Figure 4 position until the key is released, and thus allow the intermediary member and its type-bar to respond to the tension spring 43, and be restored to normal positions without the lug 51 on the interponent blocking the return passage of the tooth 48 on the intermediary member, should the key-lever 11 be held depressed.

The proportions and assembly of the parts shown in the several figures are for the middle type-bar and the shortest actuating lever 16. As the height of the lever progressively increases at either side of the center to the outer typebars, it is obvious that the movement conveyed to the intermediary member 39 in Figure 3 will be excessive for the longest actuating lever to the extreme outside type-bar, because it will be remembered that the location of the pivots 38 is uniformly the same for the whole series of levers 16, and, as it is desirable that the lug 51 shall only transmit motion suflicient to raise their associated type-bars uniformly to the dotted position of Figure 1, the transmissive throw of the lug 51 for the tooth 48 must be variable, and be predetermined by the degree of oyerlap between the edge of the lug 51 and the face of the tooth 48. To this end, each stud-hook 4545 may be adj ustablylowered through the bar 41, which effects the progressive lowering of the free ends of the intermediary members 39 and the teeth 48 thereon, to reduce the amount of surface contact between the lugs 51 and the teeth 48, and correspondingly reduce the throw of the members 39 derived from the fixed sweep of said lugs 51. I

In some machines of this character, it is possible to depress two keys jointly or clepress a second key before the type-bar actuated by the first key has passed out of the path of the next advancing type-bar, which results in strain and injury to the typing ele-, ments, and it is a desirable feature to mechanically prevent such manipulations. In the present instance a U-shaped channel-bar 67 is attached to the front face of the comb .15, below the key-levers, said bar being susseries th at extend across the keyboard, each ward including a circular lower end 71, to promote a rocking movement ofthe ward upon the floorof the channel, and a head- 72 at the upper end formed with angular faces. I The lower ends 71 fill the longitudinal-length of the channel by abutting each other, and the heads 7 2 fill a similar longitudinal space less the thickness of one keyv of the channel-bar 67' b lever 11. To' maintain this relation a gage 73 is adjustablye secured at one or both ends screws 74 binding the gage to the face of t is ends 68a. At Figure 5 one key-lever is shown depressed to spread the head 72 and take up the slack in the heads as a series and hence prevent the depression of a second key-lever. The key-levers in passing between two adjoining wards first engage the beveled corners of the heads and then pass between 'twoheads to be arrested by the edges of the channelbar 67 for a stop. The parts are so related that any key-lever will spread the heads 72 .of the wards before its interponent 49 is depressed to a position engageable by the teeth of the rotating drum. In this manner,

' when one key-lever is operatively depressed,

the depression of any other key will be arrested by the locked-together wards 7 O and prevent the depression of its interponentv &9 into the path of the rotating drum.-

To withstand the wear-of the toothed parts,

it 'Will be understood that the teeth of the drum 57, the interponent A9, thelug 51 and the teeth 480i the members 39 may all be hardened.

It will be noted that each key-lever has a pendent interponent movable with the key to interpose itself as a transmissive medium be; tween an intermediary member to the type-bar and the drum; that the operative throw or sweep of the pendent interponent is uniform.

and unchangea-ble; that the coaction bet-Ween the interponent and the intermediary member to the type-bar is variable to compensate for other connections that vary the leverage trans mitted to the segmentally-disposed type-bars;

that the force imparted to the interponent is an impulse that projects the-type-bar totype with a staccato effect; and that by increasing or decreasing the velocity of the motor-driven drum, the impact of the type against the platen may be regulatedto meet any requirements for manifolding density in typing.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

. Having thus described my invention, I

claim:

1. In a typewriting v key-lever, a coupler mounted upon the keylever and connectible with a part of the typebar mechanism when the key-lever is de-, pressed and a constantly revolving power-de-' machine, the combina-' tion of a type-bar mechanism, a disconnectedvice operative to convey a throw to the depressed coupler to actuate the'type-bar, the

coupler being self-releasing from said powerdevice and the key-lever and type-bar mechanism eing returnable to normal position independently-cf the revolving power-device.

, 2. In a typewriting machine, the. combination of a type-bar mechanism, a disconnected key-lever, a coupler mounted upon the key;

lever and connectible with a part of the typebar mechanism when the key-lever is depressed, and a constantly revolving power-device operative to convey athrow to'the depressed coupler to actuate the type-bar, said coupler interrupting its connection with the type-bar'by its throw, said type-bar mecha nism being returnable to normal o'sition independently of the depressed coup er.

3. In a. typewriting machine, the combination of a type-bar mechanism, a disconnected key-lever, a coupler pivotally mounted upon the key-lever and connectible with apart of the type-bar mechanism when the key-lever is depressed, and a power-device operative to convey a swinging throw to the depressed coupler to actuate the type-bar, said coupler in-- terrupting its connection with the type-bar "by swinging about its-pivot onthe depressed fully depressed, and a constantly revolving,

power-device operative to engage and convey an .mterruptive swinging movement to said means to actuate the type-bar and allow the driving means.

6. In a typewriting machine, the combination of a type-bar mechanism, a key-lever disconnected from the type-bar mechanism, means resiliently mounted upon the key-lever and connectible with a part of the type-bar mechanism when the key-lever is fully dereturn of the type-bar independently of the loo pressed, and a constantly revolving power 1 device operative to engage and convey move-. ment to sand means that becomes operative through 1ts reslliency to actuate the type-bar,

and then interrupt its connection with the type-bar by its throw and independently of the depressed key-lever.

. 7. In a typewriting machine, the combination of a type-bar mechanism, a key-lever disconnected from the type-bar mechanism and depressible to a fixed point, means mounted upon and depressible with the key-lever and swingably connectible with a part'of the type-bar mechanism when the key-lever is fully depressed, and a constantly revolving power-device operative to pick up and swing said depressed means to actuate the type-bar, said' type-bar actuating means interrupting its connection with the type-bar at a predetermined point of its throw to release the typebar.

8. In a typewriting machine, the combination of a type-bar mechanism, a key-lever disconnected from the type-bar mechanism, means mounted upon the key-lever and connectible with a part of the type-bar mechanism when the key-lever is fully depressed, a'power-device operative to engage and convey movement to said means to actuate the type-bar, said type-bar actuating means interrupting its connection with the type-bar at a predetermined point of its throw to release the type-bar, and means adjustable to uniformly determine the point where the type-bar will be released.

9. In a typewriting machine, the combination of a type-bar and an operating lever connected thereto, a. disconnected key-lever, a

power-driven drum, an interponent on the key-lever depressible therewith to engage the drum and be driven thereby, and means connected with said operating lever and engageable by the interponent to impart motion to the type-bar. 10. In a typewriting machine, the combnation of a type-bar and-an operating lever connected thereto, a disconnected key-lever,

aconstantly revolving power-driven drum,

an interponent pivotally mounted on the key-' lever to be depressed therewith in a straight line to engage the drum and then swing radially out of the path of the drum, and an intermediary member pivotally connected to actuate said operating lever and connectible with the swinging interponent to receive an interruptive impulse and impart motion to the type-bar that allows said bar to make its type-impact through its acquire momentum.

' 11. In a typewriting machine, t e combination of a type-bar and anoperating lever connected thereto, a disconnected key-lever, a i

POWGly-dIlVGIl drum, an interponent on, the

key-lever depressible therewith to engagethe drum and be. driven thereby, and an intermediary member connected to said operating lever and engageable, by the interponent to impart motion -to the type-bar, said interponent having an interrupted connection to the intermediary member to release the type- 1 bar at a predetermined point of its throw.

12. In a typewriting machine, the combi nation of a type-bar andan operating lever connected thereto, a disconnected key lever, a power-driven drum, a vertically disposed interponent pivotally mounted on the keylever to be depressed therewith to engage the drum and be thrown out of the path of the drum, and a horizontally movable intermediary member pivotally connected to said operating lever and engageable by the swing:

of the interponent to impart an interruptive motion to said intermediary member to release the type-bar inadvance of the typing position.

13. In a typewriting machine the combi- .end of the intermediary member horizontally.

14., In a typewriting machine, the combination of a type-bar and an operating lever ,connected thereto, a disconnected key-lever, a power-driven drum, an interponent pivotallyhung upon the key-lever and depressible with the key-lever to engage with the drum and be driven thereby throughan arc of fixed extent, an intermediary member connected to said operating lever and engageable by the interponent to convey movement to the lever and actuate the type-bar, and adjustable means to determine the interval of coaction between the drum-driven interponent and the intermediary.

15. In a typewriting machine, the combination of a type-bar and an operatin lever connected thereto, a disconnected keyever, a power-driven drum, an interponent pivotally hung upon the key-lever and depressible with the key-lever to engage with the drum and be driven thereby through an arc of fixed extent,

an intermediary member connected to said operating lever and engageable by the interponent to convey movement to the lever and actuate the type-bar, and adjustable means to raise and lower the intermediary to the fixed path of the interponent to determine the interval of coaction between them.

16. In a typewriting machine, the comblnation of a type-bar and an operating lever connected thereto, a disconnected key-lever, a

power-driven drum, an interponent pivoted to the key-lever and depressible therewith into engagement with the drum to be driven thereby, and an intermediary memberconnected to said operating lever and engageable by the interponent to impart motion to the type-bar, said interponent freeing itself from llh the intermediary in swinging about its pivot.

17. In a typewriting machine, the combination of a type-bar and an operatin lever connected thereto, a disconnectedkeyever, a

power-driven drum,' an interponent pivoted to the key-lever and depressible therewith into engagement with the drum to be driven thereby, an intermediary member connected to said operating lever and engageable by the interponent to impart m0tionto the typebars, said interponent automatically freeing itself from the intermediary by its throw in advance of the typing position, and means to restore the intermediary and type-bar inde pendently of the interponent.

18. In a typewriting machine, the combination of a type-'bar and an operating lever connected thereto, a disconnected key-lever, a power-driven drum, an interponent hung upon the key-lever and depressible with said i lever to interlock with the drum and be driven thereby, a lug carried by said interponent,

and an intermediary member connected to saidoperating lever and having a tooth engageable by said lug whcn'the interponent is depressed, said lug interrupting its driv ng connection with said-tooth by the swinging movement of the interponent.

19. In a typewriting machine, the combination of a type-bar and an operating lever con- I nected thereto, a disconnected key-lever, a power-driven drum, an interponent hung upon the key-lever and depressible with said lever to interlock with the drum and be driven thereby, a lug carried by said, interponent, an intermediary member connected to sa1d operating lever and having a tooth engageable by said lug when the interponent is depressed, said lug interrupting its driving connection with said tooth by its swing, and means to adjust the operative plane oi the tooth to the fixed radial swing of the lug to predetermine the extent of movement transmitted to the intermedlary.

20. In a typewriting machine, the combination of a series of segmental type-bars, a series of operating levers varying in lengths to operate the type-bars at their segmental posltions, an intermediary member connected to each operating lever, a series of disconnected key-levers, couplers of uniform length mounted upon the key-levers and operatively positioned to interlock with the intermediary members when a key-lever is depressed, a

power-drum operative to convey a throw to any depressed coupler to 0 mediary and throw its typear to type, and

means adjustable to each coupler whereby all of said intermediary members will impart motion from the drum to uniformly actuate the type-bars.

' 21. In a typewriting machine, the combination of a type-bar" and an operating lever therefor, an intermediary member pivoted to said operating lever and conditioned for a sliding movement, a disconnectedw key-lever,

an interponent depending from the key-lever to cross the position of the intermediary, a

.65 power-driven drum to vibrate the interponent erate an interwhen depressed into the path of the drum by the key-lever for an interruptive movement, and interlocking means between the inter ponent and the intermediary whereby the movement of the interponent will convey an interruptive movement to the intermediary prior to the interruptive movement between the interponent and the drivingdrum.

J 22. In a typewriting machine, the combination of a type-bar and an operating lever therefor, an intermediary member pivoted to said operating lever and conditioned for a sliding movement, a disconnected key-lever, an interponent depending from the key-lever to cross the position of the intermediary member, a power-driven drum to vibrate the'in-' terponent when depressed into the path of the drum by the key-lever,'and interlocking means between the interponent and the intermediary member, whereby the movement of the interponent will convey an interruptive movement to the intermediary member to actuate the type-bar, said inte onent being so conditioned as not to inter ere with the return movement of the intermediary member in restoring the type-bar.

23. In a typewriting machine, the combination of a type-bar and an operating lever therefor, an intermediary member pivoted to said operating lever and conditioned for a sliding movement, a disconnected key-lever, an interponent depending from the key-lever to cross the 'positionof the intermediary. a power-driven drum to vibrate the interponent when depressed into the path of the drum by the k y-lever, interlocking means between the interponent and the intermediary, whereby the movement of the interponent will conveyanv iHtGIIHPtIX G movement to the intermediary topartially actuate the type-bar, said type-barcompleting its stroke by its momentive force, and" a spring to restore the intermediary and the type-bar to normal positions independently of the interponent.

24. In a typewriting machine, the combination of a type-bar and an operating lever therefor; an intermediary member pivoted to said operatin lever and conditioned for a horizontal sli ing movement, a disconnected key-lever, an interponent pivoted to the keylever to hang pendent therefrom and across the plane of the intermediary, a power-driven drum to swing the interponent about its pivot when said interponent is depressed into the path of the drum bythe key-lever, and a toothed interlock between the interponent and the intermediary, whereby the radial movement of the interponent will convey a sliding movement to the intermediary at a predetermined point, and then automatically break said interlock to release the intermediary from the moving interponent:

25. In a-typewriting machine, the combination of a type-bar and an operating lever therefor, an intermediary member'pivoted to said operating lever and conditioned for a key-lever, an interponent pivoted to the keylever to hang pendent therefrom and across the plane of the intermediary, a power-driven drum to swing the interponent about its pivot when said interponent is depressed into the path of the drum by the key-lever, a toothed interlock between the interponent and theintermediary, whereby the radial movement of the interponent will convey a sliding movement to the intermediary at a predetermined point of its throw, and then automatically break said interlock to release the intermediary from the interponent," and means to adjust certain of the parts so that said interlock will be broken before the drum has conveyed a full stroke movement to the interponent.

26.- In a typewriting machine,the combination of a series of segmentally-disposed typebars to type at a common point, operating levers for the type-bars fulcrumed in a uniform horizontal plane and varying in height to connect with the type-bars at their segmental positions, horizontally-disposed intermediary members having equal lengths and pivotally connected to said levers in a uniform plane parallel to the fulcrum thereof, a series of disconnected keylevers, vertically-disposed interponents hangingv pendent from each key-lever and operatively positioned to actuate an intermediary member when the key-lever is depressed, a power-driven drum operative to positively throw any key-depressed interponent out of its path to actuate the intermediary member and impart motion to a type-bar, and individual means operative to adjust the interme= diary members to the throw of the interponents to compensate for variations in transmissive leverages whereby all the type-bars will be propelled uniformly to the printing point with uniform impacts.

27. In a typewriting machine, the combination of a series of segmentally-disposed typebars to type at a printing point, operating levers for the type-bars fulcrumed in a unithe extent of transmissive power from the form horizontal plane and varying in height to connect with the type-bars at their segmental positions, horizontally-disposed intermediary members having equal lengths and pivotally connected to said levers in a uniform plane parallel to the fulcrum thereof,

a series of disconnected key-levers, verticallydisposed interponents hanging pendent from each key-lever and operatively positioned to actuate intermediary members when a key"- lever is depressed, a power-driven drum operativeto positively throw any key-depressed interponent out of its path to actuate an intermediary member and impart motion 'to a type-bar, and means to individually adjust interponent to the type-bar actuating intermediary to compensate for variations in the length of the type-bar operatin levers, whereby the impact of all the typejmrswill be uniformly the same at the printing point.

28. In a typewriting machine, the combi-.

pendent interponents pivoted to each keylever that cross the planeof the intermediary, ,a guiding and'spacing comb for thefree 'ends of said intermediaries, a nbrmally-ineifective interlock including a lug on each interponent and a tooth on each intermediary, a spring to maintain an interponent in normal effective position with its guiding comb, and 'apower drum common to the free ends of all the interponents, each interponent being depressible by its key into engagement with the drum and into interlocking engagement with its intermediary to actuate a type-bar.

29. In a typewriting machine, the combination of ,type-bar, a key-lever and a constantly revolving power-driven device, an intermediary member having a driving connection with the type-bar,and means carried by and depressible with said key-lever into coaction with said driving device and into. driving connection with said intermediary member, to actuate the type-bar by the throw derived from the power-driven device and transmitted through the intermediary member to the type-bar, said type-bar and intermediary member being restored to normal position without interference with the rotating driving device.

30. In a typewriting machine, the combinationof a type-bar, a key-lever and a constantly I revolving power-driven device, an intermediary member having a driving connection with the type-bar, and an interponent carried by and depressible with said key-lever into co" action with said drivin device and into'driv ing connection with said intermediary mem ber, to actuate the type-bar by the throw derived from the power-driven dvice and transmitted through the intermediary member to -the t pe-bar, said type-bar and inter ediary mem er having a-free restoring moement J without interference with the rotating drivkey-lever if held deponent being tablish a drlving connection between the 'tablish a driving connect-ion between .the-

power-driven device and the intermediary to actuate-the type-bar.

32; Ina typewriting machine, the combination of a type-bar, a key-lever. and a power driven device, an intermediary member haying. a driving connection with the type-bar,

and an interponent having a positive connection with the key-lever, and an interruptive connection withthe intermediary, said interponentbeingdepre'ssible with the key to espower-driven device and the intermediary to actuate the type-bar, saidinterponent 'interrupting its connection with the driven device by its throw.

33. In a'typewriting machine, the combipowernation of a typewbar, a key-lever and a.power-; driven device, an intermediary member havate the type-bar, said interponent interrupting its connection with the intermediary by its throw.

30 nation of a type-bar, a key-lever and. a power- 34; In a typewriting machine, the combidriven device, an intermediary member having a driving connection with the type-bar,

and an interponent having a positive connection with thekey-lever, and an interruptive connection with the intermediary, said interpon'ent being depressible with the key to establish a driving connection between the power-driven device and the intermediary to actuate the type-bar, saidinterponent interrupting its connection with the power-driven device and to the intermediary by its throw.

35. Ina typewriting machine, the,combi-" nation of a type-bar, a key-lever and a power.-- driven device, an intermediary member having a driving connection with the type-bar,

aninterponent having a positive connection with the key-lever and an interruptive connection with the intermediary, said interponent being depressible with the key to establish a driving connection between-the powerdriven device and the intermediary to actuate the type-bar, said interponent interrupting its connection with the power-driven device by a throw of positive extent, andinterrupting itsconnection with the intermediary b a throw of a variable extent, and adjusta 1e means operative to of said interponent.

HERBERT H. STEELE.

predetermine the throw

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