US997137A - Carriage-feed mechanism for type-writing machines. - Google Patents

Description

E 0. O. KAVLE. CARRIAGE FEED MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED 111N117. 1906.

Patented July 4, 1911.

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' 0. 0. KAVLE. CARRIAGE FEED MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED JUNE 7. 1906.

Patented July 4, 1911.

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0. c. KAVLE. CARRIAGE FEED MECHANISM FOR TYPE WRITING MAGHINES.-

. APPLICATION FILED JUNE 7, 1906. 997, 1 37. Patented July 4, 1911.

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iaflfi I 1 'To all whom it may concern:

State of New York,

OSCAR o. KAVIiE, or SYRACUSE,

NEW YORK, ASSIGNOR' To HARVEY A. M OYER AND EMMIT G. LATTA, OF SYRACUSE, YORK.

CARRIAGE-FEED MECHANISM FOR TYPE-WRITING MACHINES.

Specification of Letters Patent.

Patented July 4, 1911.

Application filed Julie- 7, 1906. Serial No. 320,541.

Be it known that I, OSCAR C. KAVLE, a citizen of the United States, residing at Syracuse, in the county of Onondaga and have invented a new and useful Improvement in Carriage-Feed Mechanisms for Type-Writing Machines, of which the following is a specification.

This invention relates to carriage feed mechanisms for typewriting machines, that is to the feed or escapement mechanism employed for producing the stepby-step or letter space movements of the carriage.

The invention is especially applicable to front-strike typewriting machines in which the type-bars are pivoted on a segment below the platen to strike the front side of the platen, but all of the features of the invention are not, however, restricted to such type of machine.

The primary objects of the invention are to produce a carriage feed mechanism which Will cause the carriage to feed full letter spaces immediately after and only after the impact of the type-bars with the platen, and which will enable the machine to be operated with great speed; and to so constnuct and arrange the feed mechanism that no perceptible power from the keylevers is required for its operation, and so that the carriage can be set back for anew line, or a portion thereof, without the employment of the usual ratchet device with its consequent noise and annoyance.. e

Other objects of the invention are to provide a series of small, light actuators for the carriage escapement, each of which is moved independently of the others by impact front one or more type-bars, whereby the pa rt-s re: qniring movement to operate the carriage escapement are lighter and (an be operated more rapidly than where a sil'igle device is employed for all of the type-bars; to arrange the actuators intermediate of the type-bars and the escapement and provide them with retracting springs in such mannor that thcy return to initial position indepcndently of the part-which they actuate, whereby they assist in moving the type-bars immediately out of contact with the platen before the carriage is set in motion by the cscapement; to arrange the actuators in such manner that they serve as dust guards for the type-bar bearings; to mount the ac-- tuators, their springs and the universal bar 1n 1 1g. 2. Dig.

or part actuated by the actuators, on a single bracket whereby they can be assembled and adjusted on the bracket before the latter is secured in the machine and can be more partly in section in line 22, Fig. 1, showing the normal holding position of the carriage escapement. Fig. is a perspective view, partially broken away, of the supporting bracket for the universal bar actuators, a portion of the actuators being mounted on thebracket. Fig. l is a perspective view ofthe universal bar detached. Fig. 5 is a fragmentary sectional elevation of the supporting bracket for the universal bar actuators and the parts mounted thereon, in line 5-5, Fig. 2. Fig. 6 is a sectional elevation of the carriage escapement, showing" the parts in a different position from that shown 7 isa rear elevation of the type-bar segment, a portion of the type-bar hangers and one type-bar, showing the universal bar actuators in section. Fig. 8 is'an enlarged sectional elevation of the escapemcnt, showing another position of the parts. Fig. 9 is an elevation of a modified construction of the carriage cscapement. Fig. 10 is a sectional elevation of one of the universal bar actuators.

Briefly stated, the carriage feed mechanism hereinafter described in detail is 01:- ganized and operates as follows:

The type-bars are pivoted below the platen to swing upwardly and rearwardly to strike the same, an oscillating universal is connected to the. carriage escapcment' which is arranged'adjacent to the carriage, as usual, and produces a letter. space movement of the carriage each time the universal bar is-actuatcd. Between the type-bars and the universal bar is arranged a series of independent or separately movable actuators, one of which 1s adapted to be struck and 'moved rearwardlyby each type-bar and when so moved oscillates the universal bar. The several actuators .move the one universal bar, but each actuator is arranged inthe path of and adapted to be actuated by only a portion ofthe type bars. Only one actuator is operatedat a-time, and the universal bar is short and light so that the parts 1novcd in operating the ,escapement are independently of theuniversal bar and assist' in moving the type-bars out of contact with the-platen immediately after the impact Without waiting for the return of the I universal bar or the carriage escapement to provided with a plurality of sets of type' The type-bars are pivoted between for which it is connected. The escapement mechanism is of novel construction which will'be described.

Like letters of reference refer to like parts in the several figures.

A represents thefframe of the machine, B

the platen, C the carriage on which the platen is rotatably mounted and which, as usual, is movedtr'ansversely of the machine by any suitable power-driven means (not shown), D one of the type-bars, which'are pivoted in an are below the platen, and E the key levers for, operating the type-bars- These partsmaybe of any usual or preferred construction and "arrangement. In the machine illustrated, which is of the front-strike type,- the carriage travels trans-- versely of the machine on a suitable track f,

on a shift frame F which is pivoted at its ends to the main tra'meat f, in any suitable manner, in rear of "the platen, whereby the carriage can be shifted vertically for the purpose of printing diiierent case charact ers, it being understood that type-bars are wardl y projecting sidefplates or portions of hangers g separately secured on the segment, see Figs. 1 and 7 The side plates of the hangers have upwardly and rearwardly curved front ends 9' which serve as guides for the type bars in approaching the printing point and also ,as stops for the universal bar actuators, as will be described,

a d thekey? loversare connected to the t pe-bars by auxiliary levers h, 'one of 'wh1chissl'1own1nf Fig, 1, which are pivoted at-their lower'ends, are connectedat their upper ends'to thetype barsand have slidmg connections between their ends with the ikey levers; Owing to the cam shape of the \slots-Jz :of" these connections the type-bars are causedtoapproach thefplaten with an ,eral of the type-bars.

are, shaped so that the type-bars are carried through the last portion of their travel wholly by their momentum, in which case the type-bars are free to rebound for a short distance from the platen even it the key levers are held down.

The carriage feed mechanism to be de scribed operates most satistactorily in con-- nection with type-bars having an accelerating motion, but any means for producing such accelerating motion of the type-bars could be employed.

1 represents the actuators or parts for transmitting movement from the type-bars to the universal bar. Theyare arranged in the are of acircle concentric with the are of the type-bar pivots with their front ends located in rear of and adapted to be struck by the type-bars just as the latter strike the platen, and they are mounted in any suitable manner to reciprocate forwardly and rearwardly independently of each other.' Each actuator preferably consists of a straight wire or stem havinga front end or head i which is wide enough to be struck by sev- In the construction shown, each head is wide enough to he struck by seven of the type-bars, and as there are forty-two" typebars employed in the machine illustrated six actuators are used, and as the type-bars are spaced farther apart near the ends of the segment. than at thecenter thereof, the actuator heads are made oit'difi'erent widths as required. Such arrangement, however, is not necessary. A separate actuator could be employed for each type-bar, or one for each of several groups of type-bars of any desired number, and if it is desired to have all of the heads llll of the actuators of the same width thisran be effected by arranging the actuators toengage the type-bars at equal distances from the pivots, and are located ]11St above the portions of the hangers to which the typebars are pivoted in rear of the curved ends g of the hangers which form stops to limit the forward movement of the actuators.

The hangers thus prevent the actuators 'to slide forwardly and, rearwardly on a bracket K, see Figs, 1 and 3. This bracketis made from a single piece of sheet metal and has a horizontal top portion is which is secured by screws, or otherwise, to the top plate of the machine frame, and depending front and rear plates k in having holes t through which the actuator stems pass and in which theybe'ar. The actuators are normally held forward in the position shown in Fig, 1 and are returned to such position after actuation by suitable springs L, which preferably consist of strips of spring metal each having one end bent forwardly and screwed or otherwise secured to a forwardly bent lug or portion Z of the back plate of the bracket. The free end of each spring L is opposite to and bearsagainst the rear end of one of the actuator stems. As the actuator ste1ns.are, as above stated, arranged in an arc, the lugs'for the two center springs are located atthe upper portion of the rcar plate of the bracket and the springs extend downwardly therefrom, while the lugs'for the other springs are located at the lower portion of the back plate and the springs extend upwardlyat an inclination therefrom in opposite directions on opposite sides of the center of the plate. I Springs of the same length can thus be employed on a smaller bracket. By bending the lugs and .springs, as shown, displacement of the springs is prevented. The tension of the springs can l-ienregulated as required, by bending the securing lugs therefor upwardly or downwardly.

M. represents the universal bar which is arranged horizontally in rear of the supporting bracket Kfor the actuators, 1s Journaled to oscillate, and is provided with pro-.

jecting arms m, each of wliiclrhas a forwardly bent end opposite to and bearing against one of the springs L for the actuators between the ends thereof. The universal bar also has a rearwardly extending central arm m which is connected to the carriage escapcnient. As the universal bar is arranged horizontally, while the actuators are arranged in an arc, and it is desirable to produce equal movements of the bar by the several actuators, thearms m of the universal bar are made of different lengths and bear upon the springs at the points necessary to secure this result, see Figs. 2 and a shaft journaled at its 4. The universal bar preferably consists of ends in rearwardly bent bearing lugs or portions m of the rear plateof-the bracketK, and the arms at and m are formed from a single piece of sheet metalplate which is soldered in a longitudi- ,-nal groove in the shaft or is otherwise secured thereto. The armsflof the universal bar are prcferablyformed with ,ribs or flanges to give them the requisite rigidity.

The central arin m is preferably connected b as r111 m to a rcarwardl bent arm or portion m of the back plate of the bracket K, whereby the universal held in and is returned after actuation to the normal position shown in Fig. 1. All of the actuators I and their returning springs L, and also the universal bar with its retracting spring, are mounted on the single bracket K so that these parts can be assembled and properly adjusted before the bracket is secured inthe machine, and they can all be removed as a unit at any time, by detaching the bracket K from the top plate of the machine. \Vhen a type-bar is actuated it will strike the actuator in rear thereof a quick sharp blow and will, by its momentum, drivethe actuator rearwardly and through the spring L bearing against said actuator and the corresponding arm of the universal bar, rock said universal bar and operate the escapemcnt. The actuators and springs form operative connections between the type-bars andthe universal bar, butthey are not attached to either of said parts and the springs are free to return the actuators to the normal positionwithout waiting for the return of the universal bar and parts of the escapement connected thereto. The actuators are also exceedingly light and therefore can be started back quicker than the heavier universal bar, thus enabling the actuators to react instantly on the type-bars and throw them out of conact with the platen before the latter can be moved and thereby preventing the blurring of the impressions. The springs L. also form elastic cushions between the actuators and the universal bar and, therefore, greatly reduce the noise. Another advantageof this construction is that lighter springs than usual can be used for returning the key levers, and-the touch is made correspondingly easier. The type-bars are returned so quickly as to avoid possibility of collision even when the machine is used by the mostrapid operators and thus avoid one of the objections to the front-strike machine in which the type-bars all approach the platen from the same side.-- The typebars return to'their normal position with greater speed than is possible in a machine in which the universal bar is long enough for engagement by all of the key levers, or even long enough for direct engagement by all of the typebar is normally ators could also. be employed to actuate a different sort of a universal bar or common device connected to the carriage escapement. The carriage is connected to and moved to the left by any usual or'suitable powerdriven means, and the step-by-step or letter space movements thereof are caused by an escapement mechanism in the usual manner,

the escapem'ent mechanism, however, being preferably constructed as follows, see F igs.

'2, 6 and 8: 0 represents the escapement Wheel which is secured to the rear end of a shaft 39 journaledin a bearing p on the shift frame and provided, as usual, witn'a gear pinion p meshing with a toothed rack 39 on the carriage. The escapement wheel has radial teeth, the opposite sides of which have the same angularity or inclination with reference, to the radial center lines of the teeth. Q, is, an) escapement lever which is arranged parallel with the escapement wheel, or in the plane thereof, and is pivoted inany suitable manner between its ends, on a part 9 of the shift frame. One end of the lever is adjustably connected to the rearwardly projecting arm at of the universal bar, for instance, by a rod consisting of sections joined by a turn-buckle, and the other end 9 of the lever is adapted to engage between the teeth of the escapement wheel and-has opposite faces 9 q adapted byreason of their angularity to bear flat against thefopposing faces of two adjacent teeth of the escapement wheel. This end of the lever has, between the inclined faces, a

face '9 curved on an arc concentric with the escapement wheel. The escapement wheel it and lever are both carried by the shift frame and the pivotal connection between the lever .and its operating rod 9 is located nearly on the axial line about which the shift frame swings, so that with a slight looseness in this connection the carriage can be shifted Without. movement of the escapement lever with the consequent friction and wear on the sameand' the escapement wheel. The strain is very slight on the connection between the lever and rod 9 and nothing at all when the carriage is being shifted. This arrangement is a decided. improvement over the known ones in which the escapement wheel is mounted on the shift frame and lever or holding dog on the main frame, so that the one must move laterally on the other in shifting the carriage, or in which the wheel and lever are both on the main frame and the rack bar must move laterally on its controlling pinion.

R represents a dog which is pivoted to the escapement lever at the opposite side of the pivot thereof from the end g of the lever, and is adapted to be held yieldingly in an intermediate position, shown by full lines in Fig. 6, by a spring S which, in the construction shown in Figs. 2 and 6, is fixed at one end to the end 9' of the lever and bears at its free end against the heel of the dog, which is preferably flat. The dog can be de flected to opposite sides of this central position, as indicated in Fig.2 and by broken lines in Fig. 6, and will be returned to the central position in either case by the spring S. The heel of the dog extends farther from the dog pivot toward the attached end of the spring than in the opposite direction, with the result that less force is required to swing the 'dog rearwardly or to the dotted line position shown in Fig. 6 than forwardly or to the position shown in Fig. 2. The purpose of this will appear from the description of the operation of the escapement. The forward movement of the dog toward the pivotof the escapement lever is limited by av stop t of any suitable form on the escapei'nent lever. in Figs. 2 and 6 the dog is pivoted in a slot in the lever and the end of the slot forms the stop or shoulder if for the dog. In the modi-- ficatiou shown in Fig. 9, the dog R is slotted and pivoted on the lever Q which passes through the slot and has side stop shoulders t for the dog. The spring for the dog can also be differently arranged, for instance, in the modification, Fig. 9, the spring S. is not secured to the escapement lever but to a fixed part 8 of the shift frame. This spring acts on the dog similarly to the other spring and also serves to press the lever toward the escapement wheel and therefore renders the returning spring m for the universal bar unnecessary. This spring S can be adjust.- ed as required, by first loosening its securing screw, and it isheld, when adjusted, by tightening up the screw. In both constructions the pivots for both the escapement lever and the dog are preferably parallel with the axis of=the escapement wheel, so

that the lever and dog swipg in the plane of the wheel, or in planes parallel therewith, instead of crosswise thereof.

The operation of the escapement is as follows: In Fig. 2 the dog R is in engagement with atooth of the escapement wheel and is pressed by the wheel against the stop shoulder on the lever and holds the wheel against turning in theforward direction, indimted by. the arrow, that is in the direc- In the construction showntion for feeding the carriage. Each time a type-bar is operated it will strike an actuator I which, through the connections described, will swing-the escapement lever to the position shown in Fig. 8, thereby disengaging the dog from the tooth of the wheel and allowing it to be instantly swung by its spring to its intermediate position, shown in Fig. 8, ready to intercept the next tooth of the wheel when the lever returns to the initial position. The described movement of the lever throws its face 9" against a tooth of the wheel andthe lever will instantly rebound owing to the impact assisted by thespring m and place the dog in the path of said next tooth of the wheel, and this rebounding of the lever assisted by the spring m? will restore the escape-ment lever and dog and the universal bar to their normal positions before the carriage driving means can overcome the inertia of the carriage and feed the same and start the escapement wheel. Should the joints of the escapement become stifi' so that the lever will not rebound as stated, the inclined face of the tooth of the wheel acting on the inclined' face 9 of the lever will force it back to the initial position. When the dog is engaged by said next tooth of the wheel, it will be swung on its pivot until it is arrested by engagement with the stop-shoulder on the lever and thereby stops the wheel. The dog has to deflect its spring in thus swinging on' its pivot, as shown in Fig. 2,

and the spring thus serves as a cushion to prevent jar in the stopping of the wheel. The quick rebounding action of the escapement lever is made possible in large measure by the employment of the described uni-' versal bar, which is very light and is moved by a quick sharp blow delivered by the typebars which are driven with an accelerating motion and strike the universal bar actuators substantially at the instant" the typebars reach the platen, and of the universal bar actuators which are free to return to normal position or follow the type-bars as they rebo und;-.from the platen without waiti ing for the return of the universal bar. The

vof the wheel.

universal bar, and the connected escapement lever and holding dogare free to return to theirnormalspositions, and do so return before the carriage driving spring has had time to overcome the inertia of the carriage and start the escapementwheel. During the forward movement of the wheel one of its teeth passes by the curved face q of the lever and the lever, therefore, cannot be vibrated by the pressure of the wheel tooth on the dog and prevent the proper action of the dog in intercepting the next tooth The escapement will operate fairly well without the spring m but the spring is preferred, If the dog R were a rigid part of the-'escapement lever instead -With the pivoted dog and spring described it is impossible for the dog to return into engagement with the same tooth of thewheel. v

The pivoted spring-pressed dog described, besides acting as a cushion for the carriage when it stops, also allows the escapement wheel to be turned backwardly, as indicated by the arrowin Fig. 6, to set the carriage back for a new line or portion thereof, and the usual ratchet and pawl are unnecessary. From Fig. 6 it will be seen that the dog can yield to permit such backward movement of the wheel, and as the dog can' be moved beckwardly with less strain on its spring than when moved forwardly, as explained,

the action of the dog is practically noiseless,

The leverage of the spring on the dog is such that the dog can swing backwardly without oscillating the lever on its pivot, but in case the dog should raise the lever, the movement thereof would be very slight as at such time one of the teeth of thewheel would be opposite to the curved face 1 of the lever. If, from any cause, the end q of the lever-should swing between two teeth of the wheel, the action of the inclined face of the tooth on the inclined face q of the lever would restore the lever to its normal position, and the only noise therefore made in the backward movement of the carriage would be that of the dog against its spring, which, as explained, is inconsiderable.

The relative arrangement of the dog'and wheel is such that when the former is in holding position its face engages the face of the tooth on a line substantially at right angles to a line extending from the point of contact of-the dog and tooth to the pivotlofthe escapement lever. There can, therefore,

be but little wear on these faces and the es-.

capement will operate for a long time without noticeable Wear on these parts. The escapement has but one dog or part which in the normal operation of the escapement stops and holds the wheel and it therefore avoids the so-called drop of the carriage by permitting the carriage to f eed one complete letter space the instant'the dog is withdrawn from the wheel instead of 'the more common action of stopping the carriage twice for each letter-space. ment lever and the universal bar are'pos i- The escapeof the type-bar'action, quick sharp blows on the key levers are required to make the impressions and release the escapement wheel,

and the escapement will not operate with a blow that is not sufiicient to produce an im pression, so that the annoyance of having the'carriage move when no impression 1s made is avoided. The, escapement is pref-l; erably used with a type-bar action in whichj the type-bars have an acceleratingmotion as described, but the escapement could be:

employed with othersorts of type-bar actions, whetheractuated by the type-bars -or.

other parts.

Fig. 9, the Weight of the escapement is slightly reduced, andthe spring m for the universal bar is not required The single spring S serves to return the escapement 1ever to its normal position in addition to its functions of returning the dog to its normal intermediate position after deflection in either direction and cushioning thei wheel as it comes to a stop.

I claim as my invention 1. In a typewriting machine, the combination of a series of type-bars, independent actuators which are movable independently of the type-bars arranged to be operated by the type-bars as they approach the platen and to react on the type-bars to move them out of contact with the platen, a carriage esc apement, and operative connections between the said actuators and said carriage escapement, substantially as set forth. Y

21111 a typewriting machine, the combiently movable actuators arranged in the paths of the type-bars to be struck by the type-bars and moved substantially simultaneously with'the contact of the type-bars with'the platen, means for yiel'dingly resisting the movement of actuators, a carriage escapement, and operative connections between said actuators and said carriage escapement, substantially as set forth.

' 3. In a typewrit'ing machine, the, combination of a series of pivoted type-bars, independently movable actuators each having a part adapted to be struck and moved by aplurality of =the type-bars, a carriage es-,

capement, and operative connections between said actuators and said carriage escapement, substantially as set forth.

4. In a typewriting machine, the combination of a series of pivoted type-bars, in-

deperidently movable actuators which are detached from the type bars, springs for yielding ly holding said actuators in a position to be struckby the type-bars as theyapproach the platen, a carriage escapement,

and operative connections between said actuators and said carriage escapement, substantially as set forth. c

5. In a typewriting machine, the combination of a series oftype-bars, independent endwise, movable actuators arranged opposite to the type-bars, and each having a head 3 adapted to be struck by a plurality 'type'bars, springs for holding said actuators in normal-position, a carriage escapement, and operative connections between said actuators and said carriage escapeincnt, substantially as set forth. a

of the v 6. In a typewriting machine, the combination of a type-bar action having a series of pivotedtype-ba-rs, .a universal bar, independently movable actuators arranged to H transmit-movement from movable parts of In the modified construction, shown m the type-bar action to the universal bar, said actuators being detached from said universail bar, and a carriage escapement actuated by said universal bar, substantially as set forth. r v

7. In a typewriting machine, the-combination of a pivoted type-bar, a universal bar, an actuator arranged between the typebar andfsaid universal bar to be moved by the movement of the type-bar and detached I from said universal bar, and a carriage escapement actuated by said universal bar, substantially asset forth. i

8. In a typewriting machine,vthe combination of a type-bar, a universal bar, an

actuator arranged between said type -bar and universal bar to be moved by the movement of thetype-bar and detached fromsaid type-bar and universal 'bar,a spring, for returning sald actuator to normal position, anda carriage escapement actuated by' said universal bar,,subst antially as set-forth.

9. In a typewriting machine, the combination of a type-bar, a universal bar, an actuator arranged between said type-bar and said universal. bar .in the path of movement of the type-bar, a spring which is moved by said actuator and operates said universal bar, and a carriage escapement actuated by said universal bar, substantially as set forth.

10. In a typewriting machine,'the combi nation of a series of type-bars, a universal bar, independently movable actuators for transmitting movement from the type-bars to said universal bar, a fixed stop for limiting the movementof the actuators in one direction, spring means for opposing the movement of the actuators in the opposite direction, and a carriage escapcment actuatedby said universal bar, substantially as set forth. I

11. Ina typewriting machine. the combination of a series of pivoted type-bars, a

, universal barfmounted to rock, -independ-.

ently movable actuators operated by the type bars in approaching the platen for rocking said universal bar, and a carriage esca-pement actuated by substantially as set forth.

12. In a typewriting machine, the combination of a series of type-bars pivoted in an series, independently movable actuators for,

transmitting'motion from the type-bars to said universal bar, and an escapement actu' ated by said universal bar, substantially as set forth.

to the type-bars, independently movable by said universal bar,

actuators arranged in an are for transmitting motion from-the type-bars to said umversal bar, and means between said actua tors and said universal bar for causing equal movements of said universal bar by ally of said actuators, and an escapement actuated substantiallycas set forth.

14. In a typewriting machine, the combi;

nation of a series of type-bars arranged in an arc, a universal bar arranged opposite to the type-bars, independently movable actuators arranged in an arc to transmit motion from the type-bars 'to'said universal bar, and springs moved by said actuators and arranged to produce equal movements of said universal bar,.and an escapement actuated by said universal bar, substantially as set forth.

15. In a typewriting machine, the combination of a series of pivoted type-bars ar ranged in an arc, a universal bar arranged opposite to said type-bars to rock and having projecting arms, independently movable actuators arranged opposite to the type'bars in an arc, springs Which'are moved by said actuatorsand bear against the arms of said universal bar toproduce equal movements thereof, and an escapement actuated by said universal bar, substantially as set forth.

16. In a typewriting machine, the combination of a series of type-bars, a universal bar, and an escapement actuated thereby, independently movable actuators arranged to be moved by the type-bars. springs actuated to transmit movement from the actuato'r's to said universal bar and torestore said actuators to the normal position independently of said universal bar, substantially as set forth.

17. In a typewriting machine, thecombination of a series of type-bars, hangers to which said type-bars are pivoted. an escapement, and independently movable actuators for said escapement having heads arranged to be moved by said type-bars, saidsaid universal bar,

19. In a typewriting machine, the combination of a series oftype-bars, an escapement, and a movable actuator for said eseapement having a head arranged over the type-bar pivots to form dust shields therefor and adapted to be moved by the typebars, substantially as set forth.

20. In a typewritingmachine, the combination of a series of pivoted type-bars, an escapement, a movable actuator for said escapement having a flanged head arranged over the type-bar pivots in the path of movement of the typebars, substantially as set forth. 21. In a typewriting machine, the combination of a series of type-bars, a carriage escapement, a plurality of movable actuators for said escapement arranged to be moved by the type-bars, and a detachable bracketsupporting all of said actuators, substantially as set forth.

22. In a typewriting machine, the combination of a series of type-bars, a universal bar and an escapementactuated thereby, a plurality of actuators for said universal bar arranged to be moved by said type-bars,

a detachable bracket supporting said actuators and said universal bar, and. an escapement actuated-by said universal bar, substantially as set forth.

23. In a typewriting machine, the combination of a series of type-bars, a universal bar, and an escapement actuated thereby, a plurality of actuators for said universal bararranged to be moved by the type-bars, retracting springs for said actuators, and a detachable bracket supporting said actuators and springs, substantially as set forth.

24. In a typewriting IHZIChlHQ tlIGCOmbL nation of a series of type-bars, a universal bar and an escapement actuated thereby, a plurality of actuators. for said universal bar arranged to be moved'by the type-bars, retracting springs for said actuators, and a detachable bracket supporting said actuators, retracting springs and universal bar, substantially as set forth.

25. In a typewriting machine, the combi nation of a series of type-bars, a carriage escapement,'a plurality of actuators for said escapement arranged to be moved by the. type-bars, and springs for communicating nation of a series 26. In a typewriting machine, the combi-' nation of a series of type-bars, a universal bar and anescapement actuated thereby, a plurality of actuators for said universal bar arranged to be moved by the type-bars, and springs arranged with their free ends in engagement with said actuators and their central portions in engagement with said universal bar, substantially as set forth.

27. Insa typewri ing machine, the combif type-bars arranged in an are, a universal bar arranged horizontally to rock and having arms of unequal length,

an escapementactuated by said universal bar, a plurality of actuators for said universal bar arranged in an arc to be moved by the type-bars,"and springs for communi eating movement from said actuators to said universal bar, a portion of said springs bein arranged Within the arc and a portion wihhout the arc of said actuators, substantially as set forth,

28. In an escapement for typewriting ma chines, the combination of a driven toothed wheel, a pivoted lever having at one side of i its pivot a face to contact with the teeth of said wheel, which face is inclined so that the lever does not hold the wheel, a holding dog for said Wheel pivoted to said lever at the opposite side of the lever pivot and arranged to clear one tooth of said wheel substantially simultaneously with the contact of said inclined face with another tooth, and means for vibrating said lever to cause said inclined face to contact with the teeth of'the wheel,'said means normallypermitting the rebound of the lever to its original position, substantially as set forth.

29. In an escapement for typewriting machines, the combination of a driven toothed tion of said wheel and having at one side of its pivot a part to contact with the teeth of the wheel, one of said contacting parts of the lever and wheel being shaped so that the lever does not hold the wheel, a holdingdog for the wheel movably mountedon said lever at the opposite side of the lever pivot'and arranged to clear one tooth of the wheel substantially simultaneously with the contact of said part of the lever with another tooth, and means for vibrating said lever to cause said part thereof to contact with the teeth of said wheel, said means normally permitting the rebound of the lever to its original position, substantially asset forth.-

30. In an escapement for typewriting machines, the combination of a driven toothed wheel, a pivoted lever having a part to contact with the teeth of the wheel, one of said contacting parts of the lever and wheel being shaped so that the lever does not hold the wheel, a holding dog for the wheel pivoted to said lever and arranged to clear one tooth of the wheel substantially simultaneously with the contact of said part of the lever with another tooth of the \vheel means for vibrating said lever to cause said part thereof to contact with the teeth of said wheel, said means normally permitting the rebound of the lever to its original position, a spring for swinging said dog on its pivot when it clears the tooth of the wheel and yieldingly opposing the movement of the (log by the wheel, and a stop against which said dog strikes to stop the wheel, substantially as set forth.

31. In an escapement for ty ewriting machines, the combination of a riven toothed wheel, a centrally pivoted lever having a part to contact with the teeth of the wheel, one of said contacting parts of the lever and wheel being shaped so that the lever does not hold the wheel, a do pivoted to said lever for holding the who against movement in one direction, said dog being capable of yielding to allow the movement of the wheel in the opposite direction, a spring for returning said dog to the initial posit-ion, means for vibrating said lever to cause said part thereof to contact with the teeth of said wheel, and means for returning said lever to normal position immediately after its contact with the teeth of the wheel, substantially a spring for returning said dog to such intermediate position from either direction, and means for vibrating the lever, substantially as set forth.

33. In an escapement for typewriting machines, the combination of a driven toothed wheel, a pivoted lever having a part with two inclined faces for engagement wit-h the teeth of the wheel, means for vibrating said lever, and a dog ivoted to said lever for holding said whee against forward movement, said dogbeing capable of movementby said wheel in opposite directions, said inclined faces of the lever permitting the wheel to turn in either direction and restore said lever to its normal position in the event that said part of the'lever is not retracted from the wheel by said vibrating means, substanti'ally as set'forth.

34. In an escapement for typewriting machines, the combination of a toothed wheel,

faces for engagement with the teethof said wheel, and a face between said inclined faces which is curved substantially concentric with said wheel, a dog pivoted to said lever for holding said wheel and adapted to be swung inopposite directions from an intermediate position by said wheel, and means for vibrat ing said'lever, substantially as set forth.

35. 'In an escapement for typewriting inal0 chines, the combination of a driven toothed wheel, a pivoted lever, a dog pivoted on said lever at one side of the fulcrum for the lever, and means for vibrating said levenv said lever having an inclined face at the opposite side of its fulcrum arranged to en- I gage a tooth of the wheel without stopping" the wheel when the leer is vibrated to re-- lease said dog from t e wheel, said wheel acting on said inclined face of the lever serv-' in to positively restore said lever and place said dog in holding position,-substantially as set, forth.

36. In an escapement for typewriting machines, the combination of a driven wheel having teeth with opposite faces oppositely inclined with reference to the radial lines of the teeth, a pivoted lever having a part at one side of its pivot to contact with said,

inclined faces of said teeth, the inclination 39 of said faces of the teeth preventing said part of the lever from holding the wheel, a holding dog for the wheel pivoted to said lever and arranged to clear one tooth of the wheel substantially simultaneously with the contact of said part of the lever with another tooth, and means for vibrating said lever to cause said part thereof to contact with the teeth of said wheel, saidlmeans normally permitting the rebound of the le- 49 ver to its original position, substantially as set forth.

37. In an escapement for typewriting ma- -cliines, the combination of a driven toothed member, a lever pivoted to swing in a plane substantially parallel with the plane of movement of said toothed member and having a part to contact with the teeth of said member, one of said contacting partsof the levef and member being shaped so that the 50 lever cannot hold said member, a dog whichis movably mounted on said lever for engagement with said' teeth successively to hold said member and is arranged to disengage a tooth substantially simultaneously with the' engagement of said part of the lever with another tooth, and means for vibrating said lever to cause said part thereof to strike a tooth and again clear the same without arresting the wheel and in 'ad- Vance of the engagement of said holding dog with a successive tooth, substantially as set forth. '1 I 38. In an escapement for typewriting-machines, the combination of a driven wheel 1 having teeth with inclined forward faces, a

pivotedlever having. a part at one side of its I pivot to contactwith said forward. faces of said teeth, the inclination ofsaid forwardfaces of the teethi'elative to the direction of movement of said part of the lever being such that said part does not hold the wheel. a dog movably mounted on said lever at the opposite side of the lever pivot for engaging said forward fa ces'of the teeth to hold said" wheel from forward movement, and means for vibrating said lever to cause said part thereof to contact with the teeth of saidv wheel, said means normally permitting the rebound of the lever to its original position,

substantially as set forth.

39. In an escapement for typewriting machines, the combination of a driven toothed wheel, apivoted lever having at one side of its'pivot a part to contact with the teeth of the wheel, one of said contacting parts of the lever and wheel being shaped so that the lever does not hold the wheel,.a holding dog for the wheel movably mounted on said lever at the opposite side of the lever pivot and arranged to clear one tooth of the wheel substantially simultaneously with the con tact of said part of the lever with another tooth, and means for vibrating said lever to cause said part thereof to contact with the I teeth of said wheel, said means. normally permitting the rebound of. the lever to its original position, said lever having a face adjacent to said part thereof which is substantially concentric with said wheel for preventing recontact of said part with a tooth until after a predetermined movement of said wheel, substantiallyas set forth.

a universal bar actuated by the type-bars' substantially at the instant they complete their movcn'ients, a power-driven toothed wheel, a centrally pivoted lever operatively connected to the universal bar and having a part to contact with the teeth of said wheel, one of said cont-acting parts of the lever and wheel being shaped so that the lever does not hold the Wheel, and a holding dog pivoted to said lever and arranged to clear one tooth of the wheel substantially simul- 7 taneousl'y with the contact of said part of the lever with another tooth, substantially asset :fdrth.

42. In a. type-writing machine, the combination of a series of type actions iiiifiuding pivoted type-bars, a relatively small unirangedwith their pivots in an are, a plurality of actuators aranged substantially concentrically with said type-bars to be struck thereby, a carriage escapcment, and means actuated by said actuators :tor oper- 15 ating the escapement, substantially as set forth.

Witness my hand,

this 4th day of June 1906.

OSCAR C. KAVLE.

\Vitnes'ses 5 CHESTER UL REID, OTTO A. SCI-IILLY,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. Q.

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