US1012062A - Type-writing machine. - Google Patents

Description

J. D...DAUGHERTY.-

TYPE WRITING MACHINE. APPLICATION FILED MAR. 28, 1908.

Patented Dec. 19, 1911.

5 SHEETS-SHEET 1.

NVENTUR:

WITNESSES:

WURNEY J. n. DAUGHERTY. TYPE WRITING MACHINE. APPLICATION FILED MAR. 28, 1908.

1,012,062. Patented Dec.19,1911.

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J. n. D A UGHERTY. TYPE WRITING MACHINE. I APPLICATION FILED MAR. 28, 1908.

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J.D.DAUGHERTY.

TYPE WRITING MACHINE.

APPLICATION FILED MAB.28,190&

Patented Dec. 19, 1911.

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w-hs ATTORNEY J. DLDAUGHERTY.

TYPE WRITING MACHINE.

Patented Dec. 19, 1911.

APPLICATION FILED MAR. 28, 1908.-

6 SHEETS-SHEET 6.

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HIS ATTORNEY .WMW

COLUMBIA PLANOGRAPH CDHWASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

JAMES D. DAUGI-IERTY, OF KITTANNING, PENNSYLVANIA, ASSIGNOR TO UNION TYPE- WRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A. CORPORATION OF NEW JERSEY. I

TYPE-WRITING MACHINE.

To all who'm 'it may concern:

Be it known that I, JAMES D. DAUGI-IERTY, citizen of the United States, and resident of Kittanning, in the county of Armstrong and State of Pennsylvania, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My invention relates to typewriting machines and more particularly to type actions.

One object of my invention is to provide a simple and efficient front-strike type action.

A further object of my invention is to provide a type action which affords an easy start and in which the type bar receives an accelerated movement as it approaches the printing position.

A still further object of my invention is to provide a structure whereby a uniform leverage, a uniform touch and a uniform extent of dip of the different keys is provided throughout the system.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of parts and combinations of devices to be hereinafter described and particularly pointed out in the appended claims.

In the drawings, wherein like reference characters indicate corresponding parts in the various views, Figure 1 is a diagrammatic side elevation of one form of type action embodying my invention. Fig. 2 is a diagrammatic side view showing a series of four key levers and some of the parts controlled thereby and the disposition of the parts as they appear when different keys are depressed. Fig. 3 is a diagrammatic front elevation with parts in section of a series of type actions. Fig. 4: isa diagram matic side elevation showing another form of type action embodying my invention. Fig. 5 is a like view of still another form of type action embodying my invention.

Fig. 6 is a fragmentary side elevation showing a still further modification of a portion ofthe type action.

The present invention is in the nature of an improvement 011 the construction disclosed in my application Serial No. 283,758, filed October 21st, 1905 and the claims herein are intended to be restricted to distinguish Specification of Letters Patent.

Application filed March 28, 1908.

PatentedDec. 19, 1911. Serial No. 423,948.

3 inclusive, segmentally arranged upwardly and rearwardly moving type bars 1 are pivoted at 2 and are adapted to strike against the front face of a platen 3, the type bars being supported in their normal positions by a type rest at. In the construction shown in these figures each type bar is connected to a forwardly extending pull link 5 pivotally connected at its forward end to the upper end of a nearly upright straight sublever 6 of the first order. These sub-levers are fulcrumed in an are on a curved pivot wire 7, situated forward of the type bar pivots, so that the sub-levers are pivoted at gradually higher elevations from the center to the sides of the system as shown in bars are arranged, as will be seen upon reference to Fig. 8. The upper arm ofeach sub-lever is preferably longer than the lower arm. The lower arm of each sub-lever is connected to the forward end of a rearwardly extending link 8 which is pivotally connected at its rear end to the upwardly extending arm 9 of a bell crank or angular sub-lever- 10, pivoted at 11 and provided with a rearwardly extending arm 12 curved at its upper or contact face 13. The fixed pivot'll for the various angular sub-levers is situated beneath substantially straight key levers 14c and extends in a straight line from side to side of the machine beneath the key levers. The key levers preferably have a parallel arrangement and are pivoted at 15 and are provided with usual finger keys 16. The upwardly extending arms '9 .of the angular sub levers extend between the key levers as shown in Fig.1 and are each provided with a rearwardly extending portion 'or abutment 1.7

Each key lever has formed thereon or secured to oneside thereof by rivets or other means a plate-like piece 18. This plate-like piece is offset to one side of its key lever and the lower edge 19 thereof is situated above the arm 12 of the associated angular sub-lever 10 for cooperation with the curved contact face 13 of said angular lever. The plate-like piece 18 has an upwardly extending arm 20 which in the normal positions of the parts is in contact with the abutment 17 on the associated angular sub-lever in order to prevent a rebound of the type bar as will hereinafter more clearly appear. Contractile springs 19 are each connected at one end to the upper arm of a sub-lever 6 and at the other end to the associated key lever, or the plate 18 carried thereby, in order to restore the various portions of the type action to their normal positions. This restoring spring for each type action may be relied upon to restore all of the parts to their normal positions or suitable auxiliary restoring springs may be employed. In the normal positions of the parts the contact face 13 of the angular sub-lever is preferably free from contact with the face 19 of the associated key lever. It therefore follows that a slight depression of the key lever against the tension of its spring 19 may be effected before motion is transmitted to the angular sub-lever and the parts controlled thereby. This movement is sufficient to effect a downward movement of the arm or abutment 20 with the key'lever in order to move it to a position where it will no longer lock the upright arm of the associated angular. lever against rearward movement. A further depression of the key lever brings the contact face 19 thereof into engagement with the curved contact face 13 on the angular lever, thus vibrating the angular lever from the position shown in full lines to that indicated in dotted lines in Fig. 1 to transmit movement through the associated link 8, sub-lever 6 and link 5 to the type bar. The rolling contact between the key lever and angular sub-lever causes the power to be transmitted to the angular lever nearer to its fulcrum 11 as the key lever descends, thereby producing a gradual acceleration of the type bar in its movement from its normal position to the printing position as indicated in Fig. 1. Thus it will be seen that a depression of the key from the position indicated at a to that indicated at b in Fig. 1

produces a movement of the type bar from the position shown at a to that indicated at 6, whereas the same extent of key-depression from the position indicated at b to that indicated at 0 produces a greater extent of movement of the type bar from the position Z) to that indicated at c. A still greater extent of movement of the type bar is effected from the positions 0, cl; thus approximately one-half of the complete movement of the type bar takes place, from d to 6, during the last fourth of the depression of the key, from the position indicated at (Z to that shown at e. The initial portion of the key depression is effected While the key lever is operatively disconnected from the type action, so that it does not have the weight of the parts to carry at the first part of the key stroke and a movement of the key from the position indicated at a to the position indicated at b is effective to produce a very slight movement of the type bar, so that at the initial portion of the key stroke but little resistance is offered to the key depression and a very light touch at the beginning of the stroke is provided. The resistance is increased and the type bar is accelerated after the parts have acquired momentum and at a time when the resistance offered to the key depression is not so appreciable as at the beginning of the stroke. As the type bar is restored to normal position where it bears against the type rest 4: the abutment 20 will be interposed in the path of the up- .right arm on the angular sub-lever so that any tendency of the type bar to rebound from the pad or type rest will tend to force the link 5 forward, and the link 8 backward, and this tendency will be resisted by the abutment 20 on the key lever contacting with the upright arm of the angular sublever. The force exerted by the tendency of the type bar to rebound is transmitted longitudinally of the key lever against the fixed pivot 15, so that the parts are positively locked to prevent the rebound of the type bar, thus overcoming any liability of adjacent type bars clashing through rebound near the type bar rest or support in the rapid operation of the bars. The lock, however. is automatically released at the first portion of the key depression which is effective to remove the abutment 20 from the path of the arm 9 of the sub-lever or the projection 17 thereon. In practice'I have found that the proportions shown 'of the arms of the upright sub-lever 6 have proved eflicient though these proportions may be varied at will. While the sub-levers 6 have, as stated, a general upright disposition, they are slightly radially disposed or fanned as shown in Fig. 3, so as to compensate for the difference in width between the system of key levers and the system of type bars.

In order to compensate for the variation in leverage due to the differences in length of the kev levers for the different banks of keys as shown in Fig. 2, I make the lower the upper end of every other sub-lever 6 moves, and key-levers f, g, h and i (Fig. 2) of different lengths will impart different angular movements to the angular levers 10 on which they act, and the links 8 attached to these levers 10 will be moved dif ferent distances. If a sub-lever 6 is to be connected with an angular lever on which a short key lever f acts, this being one of the key levers to which the keys of the highest bank are attached, the lower end f of the sub lever 6 will be at a point to which the link 8, pivoted to the sub-lever at that point, will impart the proper angular movement when the key of the lever f is depressed from its normal to its lowest position. If this sub-lever 6 is to be actuated by a key lever g, h or i then of course the lower end g, h or z" of the sub-lever will be nearer to the fulcrum 7 than is the point f; and at such a distance from the fulcrum that the link 8, angular lever 10, and the key lever g, h or t" which acts on the angular lever, will impartthe required angular movement to the sub-lever 6 when the key is depressed to the end of its stroke. Obviously the right length of the lower arm of any sub-lever 6 can be determined mathematically, or otherwise, whichever of the forms. of the four forms of key-levers contained in the machine? the key lever of the type action including that sub-lever may have. By means of the construction described a uniform dip of the various printing keys 16 is effected throughout the system, notwithstanding the fact that different extents of angular movements are transmitted to the angular sub-levers by the key levers of different lengths and a uniform leverage is provided for the type actions throughout the system. The construction of each type action is such that an easy start is provided and little or no side strain is produced upon the type actions, the pull upon the links 5 and 8 being in direct lines fore and aft of the machine. The upper arms of the sublevers gradually increase in length from the center to the sides of the system in order to bring their upper ends to the proper height with relation to the type bars.

In Figs. 4, 5 and 6 I have shown other forms of type actions in all of which, nevertheless, the advantages hereinbefore aointed out are embodied. In the construction shown in Fig. 4 the sub-levers 6 are mounted rearwardly of the type bar pivots 2 and are connected to the type bars by pull links 5 and are connected to the angular levers 1O by pull links 8*. The arms 12 of the angular levers extend forwardly from their pivots instead of rearwardly therefrom as in the construction shown in Fig. 1 and cooperate with a plate-like contact piece 18 secured to one side of the associated key A. contact piece or arm 20 pro lever l f jects upwardly from the plate-like member 18" and cooperates with the upright arm 9 of the associated angular sub-lever 10 in order to lock the type bar against rebound in its normal position as in the construction previously described. The accelerated ac- .tion of the type bars is effected in the same manner as previously described and the type bars are locked against rebound in their normal positions. The sub-levers 6 and links 8 may be connected at varying points in the lengthsof the lower lever arms as previously described, in order to compensate for the variations in the action of key levers of different lengths.

In Fig. 5 the key levers 14? are each formed substantially straight and are each provided with an upwardly extending arm or abutment 20 with which an off-set 21 on an angular sub-lever lO 'co-acts. The rearwardly extendingarm of each sub-lever is provided with an off-set curved contact shoe 13 which extends beneath the associated key lever and is adapted to contact therewith so that motion will be transmit-ted from the angular sub-lever through its connecting link 8*, sub-levers 6 and connecting link 5* to the type bar. The off-set 21 on the angularlever in its normal position cooperates with the projection 20 on the key lever to prevent the rebound of the type bar. A slight depression of the key lever carries the projection 20 thereon out of the path of the off-set 21 to release the lock and effect an actuation of the angular levers and the parts controlled thereby. In the construc tion shown in Figs. 4 and 5 contractile restoring springs 19 may be employed in the same general manner as described in connection with the construction shown in Fig. 1.

In Fig. 6 I have shown a construction in which the key levers 22 are each recessed at 23 in order that the associated angular lever 24 may be received in the recessed portion of the key lever and may be situated in the same vertical plane as the key lever. An upwardly extending arm 25 on the key lever normally cooperates wit-h the part 26 on the upright arm of the associated angular sub-lever in order to lock the type bar against rebound in the normal position thereof. The face 27 of each key lever is provided for cooperation with a curved con tact face 28 on the. associated angular sublever in order to provide a rolling contact to afford a variation in the leverage when the key lever is depressed and to e'ifect "an accelerated movement of the type bar as it approaches the printing position. The angular levers may be connected to the type bars through a system of upright sub-levers and pulllinks as in the construction shown in Figs. 1 and 5.

It will be seen that the key levers in all 5 constructions are horizontally disposed and that the parts are so constructed and arranged that, if desired, the segment carrying the type bars may be shifted to change the case position of the type bars. It will 0 also be seen that the links 8, 8 and 8 are pivoted to their respective sub-levers 6, 6 and 6 at different distances from the fulcrums of said sub-levers to compensate for the variation in action due to the difference in length of the key levers, and that the angularsub-levers in each construction are all of a uniform size and each of them has an arm that extends in the general direction of the length of its associated key lever.

Various changes may be made without departing from the spirit and scope of my invention.

WVhat I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combination of a series of type bars; a series of key levers; and means between the type bars and key levers for effecting a gradual acceleration of the type bars. in their movements to printing position and for affording.

a uniform leverage and dip throughout the system, said means comprising angular levers having rolling contact with the key levers, and sub-levers of different lengths operatively connected with said angular levers and type bars.

2. In a typewriting machine, the combination of a series of type bars; a series of key levers; and means between the type bars and key levers for effecting a gradual acceleration of the type bars in their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers pivoted on fixed fulcrums beneath the key levers and having a rolling contact with said key levers, and sub-levers of different lengths pivoted on fixed fulcrums above the key levers and operatively connected with said angular levers and type bars.

3. In a typewriting machine, the combination of a series of type bars; a series of key levers of the second order; and means between the type bars and key levers for effecting a gradual acceleration of the type bars in their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers having rolling contact with said key levers, and sub-levers of the first order and of different lengths operatively connected with said angular levers and type bars.

4:- In a typewriting machine, the combi- 6 nation of a series of type bars; a series of key levers ofthe second order; and means between the type bars and key levers for effecting a gradual acceleration of the type bars in their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers pivoted on fixed fulcrums beneath the key levers and having rolling contact with said key levers, and sub-levers of the first order and of different lengths pivoted on fixed fulcrums above the key levers and operatively connected with 'said angular levers and type bars.

5. In a typewriting machine, the combination of a key lever, an angular lever having a rolling contact with said key lever, a type bar, a sub-lever operatively connected with said angular lever and'said type bar, and means carried in part by the key lever and in part by said angular lever for lock ing the type bar against rebound when the parts are in the normal positions.

6. In a typewriting machine, the combination of a key lever, an angular lever pivoted on a fixed fulcrum beneath the key lever and having a rolling contact with said key lever, a type bar, a sub-lever pivoted on a fixed fulcrum above the key lever and operatively connected with said angular lever and said type bar, and means carried in part by the key lever and in part by said angular lever for locking the type bar against rebound when the parts are in the normal positions.

7. In a typewriting machine, the combination of a key lever of the second order, an angular lever having a rolling contact with said key lever, a type bar, a sub-lever of the first order operatively connected with said angular lever and said type bar, and means carried in part by the key lever, and in part by said angular lever for locking the type bar against rebound when the parts are in the normal positions.

8. In a typewriting machine, the combination of a series of type bars; a series of substantially straight key levers; and means between the type bars and key levers for effecting a gradual acceleration of the type bars in their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers having rolling contact with the key levers, and substanially straight sub-levers of different lengths between said angular'levers and type bars.

9. In a typewriting machine, the combination of a series of type bars; a series of substantially straight key levers of the second order; and means between the type bars and key levers for effecting gradual acceleration of the type bars in their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers having rolling contact with said key levers, and substantially straight sub-levers of the first order and of different lengths between said angular levers and said type between the type bars and key levers for effecting a gradual acceleration of the type bars in their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers having rolling contact with said key levers, substantially straight sub-levers of different lengths,links between said angular levers and sub-levers, rand links between said sub-levers and type ars 11. In a typewriting machine, the combikey levers; and means between the type bars and key levers for effecting a gradual acceleration of the type bars in their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers having rolling contact with said key levers, sub-levers of different lengths, links between said angular levers and sublevers,

and links between saidsub-levers and type bars.

12. In a typewriting machine, the combination of a series of type bars; a series of key levers; and means between the type bars and key levers for effecting a gradual acceleration of the type bars in their move ments to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers pivoted on fixed fulcrums beneath the key levers and having rolling contact with said key levers, sub-levers of different lengths pivoted on fixed fulcrums above the key levers, links between the angular levers and sub-levers, and links between said sublevers and type bars.

13. In a typewriting machine, the combination of a substantially straight key lever,

an angular lever having a rolling contact with said key lever, a substantially straight sub-lever, a link between said angular lever and sub-lever, a type bar, a link between said sub-lever and type bar, and means carried in part by the key lever and in part bar against reboundwhen the parts are in the normal positions. p

14. In a typewriting machine, the combination of a key lever, an angular lever hav ing a rolling contact with said key lever, a type bar, a sub-lever, a link between said angular lever and sub-lever, a link between the sub-lever and type bar, and means carried in part by the key lever and in part by said angular lever for locking the type bar against rebound when the parts are in the normal positions.

15. In a typewriting machine, the combination of a series of type bars; a series of key levers; and means between the type bars and key levers for efiecting a gradual acceleration of the type bars in their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers pivoted on fixed fulcrums below the key levers, one of each of the companion key levers and angular lever members having an. ofl-set contact face with which the other member has a rolling contact, sub-levers of different lengths operatively connected to said angular levers, and means for operatively connecting said sub-levers with the type bars.

nation of a series of type bars; a series of- 16. In a typewriting machine, the combination of a series of type bars; a series of key levers; and means between the type bars" and key levers for effecting a gradual accel- 3 eration of the type bars in their movements lto printing position and for affording a uniform leverage and dip throughout the system, said means comprising angular levers pivoted on fixed fulcrums below the key levers, one of each set of companion key lever and angular lever members having :an off-set contact face with which the other member has a rolling contact, upright sublevers of the first order and of different lengths pivoted on fixed fulcrums above the key levers and operatively connected to said angular levers; and means for operatively connecting said sub-levers with the type bars.

17. In a typewriting machine, the combination of a series of type bars; a series of 1 key levers; and means between the type bars and key levers for effecting a gradual acceleration of the type bars'in'their movements to printing position and for affording a uniform leverage and dip throughout the system, said means comprislng angular levers pivoted on fixed fulcrums below the key levers, one of each set of companion key lever and angular lever members having an off-set contact face with which the other member has a rolling contact, sub-levers of a different lengths, links between said angular levers and sub-levers, and links between isaid sub-levers and type bars.

by said angular lever for locking the type which the other member has a rolling con- ;tact, a sub-lever operatively connected to said angular lever, a type bar operatively connected with said sub-lever, and cooperative means for effecting an engagement be tween the angular lever and key lever to prevent a rebound of the type bar from its normal position.

19. In a typewriting machine, the combination of a key lever, an angular lever pivoted on a fixed fulcrum below the key lever, one of the key lever and angular lever members having an offset contact face with which the other member has a rolling contact, an upright sub-lever of the first order pivoted on a fixed fulcrum above the key lever and operatively connected to said angular lever, a type bar operatively connected with said sub-lever, and cooperative means for effect ing an engagement between the angular le-' ver and key lever to prevent a rebound of the type bar-from its normal position.

20. In a typewriting machine, the combination of a key lever, an angular lever pivoted on a fixed fulcrum below the key lever, one of the key lever and angular lever members having an offset contact face with which the other member has a rolling contact, a sub-lever, a link between said angular lever and sub-lever, a type bar, a link between said sub-lever and type bar, and cooperative means for efiecting an engagement between the angular lever and key lever to prevent a rebound of the type bar from its normal position. V

21. In a typewriting machine, the combination of a key lever, an angular lever pivoted on a fixed fulcrum beneath the key lever and having an arm that extends substantially horizontally in the same general direction as the key lever and has a rolling contact therewith, said angular lever also having an arm that extends upwardly above the key lever, an abutment on the key lever .with which said upwardly extending arm cooperates in the normal positions of the parts, a type bar, and intermediate actuating connections between said type bar and angular lever.

22. In a typewriting machine, the combination of akey lever, an angular lever pivoted on a fixed fulcrum beneath the key lever and having an arm that extends in the same general direction as the key lever and has a rolling contact therewith, said angular lever also having an arm that extends upwardly above the key lever, an abutment on the key lever with which said upwardly extending arm cooperates in the normal positions of the parts, a type bar, and a sublever intermediate of and operatively connected with said type bar and angular lever.

23. In a typewriting machine, the combination of a key lever, an angular lever pivoted on a fixed fulcrum beneath the key lever and having an arm that extends in the same general direction as the key lever and has a rolling contact therewith, said angular lever also having an arm that extends upwardly above the key lever, an abutment on the key lever with which said upwardly extending arm cooperates in the normal positions of the parts, a type bar, an upright sub-lever, a link between said angular lever and sub-lever, and a link between said sublever and type bar.

24:. In a typewriting machine, the combination of a substantially straight key lever of the second order having an upwardly extending projection, an angular lever having an arm that extends in the same general direction as said key lever and has a rolling contact therewith, said angular lever also having an upwardly extending arm that is adapted to engage the upwardly extending projection on the key lever to prevent rebound of the type bar, a fixed fulcrum beneath the key lever on which said angular lever turns, a type bar, and connections between said angular lever and type bar.

25. In a typewriting machine, the combination of a substantially straight key lever of the second order having an upwardly extending projection, an angular lever having an arm that extends in the same general direction as said key lever and has a rolling contact therewith, said angular lever also having an upwardly extending arm that is adapted to engage the upwardly extending projection on the key-lever to prevent rebound of the type bar, a fixed fulcrum beneath the key lever on which said angular lever turns, a type bar, and an intermediate sub-lever operatively connected with said angular lever and type bar.

'26. In a typewriting machine, the combination of a substantially straight key lever of the second order having an upwardly extending projection, an angular lever having an arm that extends in the same general direction as said key lever and has a rolling contact therewith, said angular lever also having an upwardly extending arm that is adapted to engage the upwardly extending projection on the key lever to prevent rebound of the type bar, a fixed fulcrum beneat-h the key lever on which said angular lever turns, a type bar, an upright sub-lever, a link between said sub-lever and angular lever, and a link between said sub-lever and type bar.

27. In a front strike typewriting machine, the combination of a system of upwardly and rearwardly striking type bars arranged in an arc, a system of radiating upright levers, the upper ends of which are arranged in an arc corresponding to the arc in which the type bars are arranged, said levers being pivoted in an arc, and key actuated devices operatively connected to said levers and having a rolling action one on another to give an accelerated movement of the type bars as they approach the printing point, the radiation of the upright levers compensating for the difference in width between the system of type bars and the system of key actuated devices.

28. In a front strike typewriting machine, the combination of a system of upwardly and rearwardly striking type bars arranged in an arc, a system of radiating upright levers, the upper ends of which are arranged in an arc corresponding to the arc in which the type bars are arranged, said levers being pivoted in an arc, andkey actuated devices operatively connected to said levers at different distances from the fulcrnms of said levers and having a rolling action one on another to give an accelerated movement of the type bars as they approach the printing point.

29. In a front strike typewriting machine, the combination of a systemof upwardly and rearwardly striking type bars arranged in an arc, a system of radiating upright levers, the upper ends of which are arranged in an rare corresponding to the arc in which the type bars are arranged, said levers being pivoted in an arc, and key actuated devices operatively connected to said levers at different distances from the fulcrums of said levers and having-a rolling action one on another to give an accelerated movement of the type bars as they approach the printing point, said keyactuated devices including key levers of different lengths.

30.. In a front strike typewriting machine, the combination of asystem of upwardly and rearwardly striking type bars arranged in an are, a system of radiating upright sublevers, the upper ends of which are arranged in an arc corresponding to the arc inwhich thetype bars are arranged, said sub-levers being pivoted in an arc, key levers, and angular levers having a rolling contact on said key levers and operatively connected to said sub-levers. i

31. In a front strike typewriting machine, the combinationof a system of upwardly and rearwardly striking type bars arranged in an are, a system of radiating upright sub levers, the upper ends of whichare arranged in an arc corresponding to the are in which the type bars are arranged, said sub-levers being pivoted in an are, key levers, angular levers having a rolling contact on said key levers, links between said angular levers and sub-levers, and links between said sub-levers.

and type bars.

32. In a front strike typewrltingmachine,

the combination of a system of upwardly and rearwardly striking type bars arranged in an arc, a system of radiating upright sublevers, the upper ends of which are arranged in an arc corresponding tothe arc in which the type bars are arranged, said sub-levers being pivoted in anarc, and key actuated devices operatively connected to said levers at different distances from the fulcrums of said levers and having a rolling action one on another to give an accelerated movement of the type bars as they approach the printing point, said key actuated devices comprising key levers of different lengths, and angular levers having rolling contacts on said key levers.

In a front strike typewriting machine, the combination of a system of upwardly and rearwardly striking type bars arranged in an arc, a system of radiating upright levers, the upper ends of whichare arranged in an arc corresponding to the arc in which the type bars are arranged, said levers being pivoted in an are, key actuated devices operatively connected to said levers and having a rolling action one on another to give an the type bars are arranged, said levers being pivoted in an arc, and key actuated devices operatively connected to said levers at different distances from the fulcrum of said levers and having a rolling action one on another to give an accelerated movement of the type bars as they approach the printing point, said key actuated devices including key levers of different lengths, and means carried in part by said key levers for preventing rebound of the type bars from normal position.

35. In a front strike typewriting machine, the combination of "a system of upwardly and rearwardly striking type bars arranged in an are, a system of radiating upright sublevers, the upper ends of which are arranged in an arc corresponding to the arc in which the type bars are arranged, said sub-levers being pivoted in an are, key levers, angular levers having a rolling contact on said key levers, and cooperative engaging means between the angular levers and key levers for preventing rebound of the type bars from normal position.

36. In a front strike typewriting machine, the combination of a system of upwardly and rearwardly striking type bars arranged in an arc, a system of radiating upright sublevers, the upper ends of which are arranged in an arc corresponding to the arc in which the type bars are arranged, said sub-levers being pivoted in an arc, key levers, angular levers having a rolling contact on said key levers, links between said angular levers and sub-levers, links between said sub-levers and typebars, and cooperative engaging means between thev angular leversand key levers levers, the upper ends of which are arranged in an arc corresponding to the arc in which the type bars are arranged, said sub-levers being plvoted 1n an arc, angular levers operatively connected to said sub-levers atdif-' ferent distances from the fulcrums of the latter, key levers of different lengths with which said angular levers have a rolling contact to give an accelerated movement of the type bars as they approach printing position, and engaging projections on said key levers with which said angular levers engage to prevent rebound of the type bars from normal position.

38. In a typewriting machine, thecombination of a series of type bars, a series of key levers of different lengths, a series of intermediate pivoted actuating devices between said key levers and type bars, the key levers'being connected to said actuating devices at difierent distances from the pivots thereof depending on the lengths of said key leversto afford a uniform leverage throughout the system, and means whereby an acceleration of each type bar is effected as it moves toward the printing posit-ion.

39. In a typewriting machine, the combination of a series of type bars, a series of. key levers of different lengths, a series of intermediate sub-levers between said key levers and type bars, the key levers being connected to said sub-levers at different distances from the pivots thereof depending on the lengths of said key levers to afford a uniform leverage throughout the system, and means whereby an acceleration of each type bar is effected as it moves toward the print ing position.

40. In a typewriting machine, the combination of a series of type bars, a series of key levers of different lengths, two series of sublevers between the key levers and type bars, and links-between said sub-levers, the points of connection of the links to one set of sublevers being at different distances from the fulcrums thereof depending on the lengths of the associated key levers to afford a uniform leverage throughout the system and a uniform extent of dip to the keys throughout the system.

41. In a typewriting machine, the combination of a series of type bars, a series of'key levers of difierent lengths, a series of intermediate sub-levers between the type bars with their actuating means at different points in their lengths depending on the length of the associated key lever, and means whereby an acceleration of each type bar is efiected as it moves toward the printing position.

r 42. In a typewriting machine, the combination of a series of type bars, a series of key levers of different lengths, a series,of intermediate upright sub-levers between the type bars and key levers, the upper arms of said sub-levers increasing in length from the center to the sides of the system, and links which are connected with said sublevers at different points in their lengths depending on the length of the associated key lever. V V 43. In a typewriting machine, the combination of key levers of different lengths;

type bars, intermediate connections between I the key levers and type bars, said connections including sub-levers, and links connected to the sublevers at different distances from their fulcrums depending on the lengths of the key levers.

44. In a typewriting machine, the combination of key levers of difierent lengths; type bars, intermediate connections between the key levers and type bars, said connections including upwardly extending substantially straight, sub-levers of different lengths, and means whereby a. uniform leverage is provided for the dififerent type actions and a uniform extent of dip of the different keys is provided.

.45. In a typewriting machine, the combination of key levers of different lengths, type bars, intermediate connections between the key levers and type bars, said connections including upwardly extending substantially straight sub-levers of different lengths, means whereby a uniform leverage is provided for the different type actions and a uniform extent of dip of the different keys is provided, and means whereby an accelerated movement of each type bar is position.

. 46. In a typewriting machine, the combination of key levers of different lengths, type bars, intermediate connections between the key levers and type bars, said connections including upright sub-levers of the first order and of different lengths, the upper ends of one set of arms of said. sublevers being arranged in an arc which coreffected as it'moves toward the printing age is provided throughout the system, and I means whereby each type bar is accelerated as it moves toward the printing point.

49. In a typewriting machine, the combination of a series of key levers, a series of angular levers of a uniform size and'each having a rolling contact with the associated key lever, a series of type bars and a series of sub-levers operatively connected with said angular levers and said type bars.

Signed at Kittanning, in the county of Armstrong, and State of Pennsylvania, this 25th day of March A. D. 1908.

JAMES D. DAUGHERTY.

Witnesses:

PAUL MGKENRIED, J. M. PAINTER.

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

Washington, D. C.

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