US1531104A - Typewriter - Google Patents

Description

March 24, 1925. 1,531,104

' w. P. KIDDER TYPEWRITER o i Filed July 20, 1921 5 Sheets-Sheet l 1 w. P. KIDDER TYPEWRITER gsigina} Filed July 20, 1921 5 Sheets-Sheet 2 62 Marh 24, 1925.

' W. P. KIDDER TYPEWRITER Qriginal Filed July 20, 1921 5 Sheets-Sheet 5 W. P. KIDDER March 24. 11925. I

TYPEWRITER 5 Sheets-Sheet t Original Filed July 20 ATTORN EY Patented Mar. 24, 1925.

- YUNI ED STATESPATENT OFFICE WELLINGTON PARKER KIDDER, OF i ROCHESTER, NEW YbB-K, ASSIGNOR, BY MESNE CORPORATION on NEW YORK.

I SSIGNMENTS, TO ROCHESTER INDUSTRIES, mm, or. ROCHESTER, NEW YORK, A

TYPEWRITER.

Application filed July 20, 1921, Serial no. 486.149. Renewed Jul 7, 1924.

T allwhom; z'tmay concern.

fer;

Be it known that I, WELLIN TON PARKER KID ER, a citizen of the United States, and resident of Rochester, in the county of Monroe and State'of New York, have invented certain new and useful Improvements in Typewriters of which the following is a specification.

[This invention in typewriting machines; its main objects being to produce a'shift mechanism for use in vertically shifting, either a vertically shiftable type head-cage used in cooperation with an endwise movable paper carriage, that is not shiftable vertically; or in vertically shifting a vertically shiftable, endwise movable paper carriage in cooperation with type heads having rectilinear movement only; the type heads in each case having a plurality of three printing 7 characters spaced'apart one above another.

In :the accompanying drawings forming a part hereof and illustrating my invention z v i Fig. 1 is a top plan View of the base and key lever guide construction 1 of my new typewriting machine." v

a Fig. 2 is a transverse sectional view from front to back at line 2-2 ofFig. 1 of what is shown in Fig. 1.

Fig. 3 is a top plan view of the machine in partial assemblage" and particularly illustrates the, type head cage construction and features of. the .cage shifting mechanism.

Fig. dis a transverse section from front to back at line44 of Fig. 3 with a type head and type head actuating mechanism in place. 7

vFig.-5 is a vertical sectional elevation from front to rear of the machine at line f t of Fig. 3. This view shows a type head at impression point with the cage in its intermediate position with the intermediate printing character of three spaced apart and vertically aligned printing char acters at the impression point.

Fig 6 is a transverse vertical sectional view in all respects like Fig. 5, exceptthat the cage and cage actuating mechanism are in their mostelcvated positions with the relates to improvements lowermost printing character at the impres- S1011 point.

Fig. 7 is a transverse sectional view in all respects like Figs. 5 and 6, except that the cage and the cage shifting mechanism are in their lowermost positions with the upper most printing character at the impression point. i

Fig. 8 isflan elevational view partly in vertical section at line 8-8 of Fig. 11 of my new selective, tilta'ble, cage shift key lever. e

' Fig. 9 is a front-elevation thereof. Fig. 10 is an elevation'of the vertically slotted front wall of the machine.

Figs. 11, 12 and 13 are side elevational views, respectively showing the cage shift key lever depressed to its fullest extent for depressing the cage to its lowest position; showing the cage shift key lever depressed to its fullest extent for lifting the cage to its highest position; and showing the shift key in itshighest position'for positioning thecage at its intermediate position.

Fig. 14:. is a topplan view showing the shift mechanism installed for, use in connection with a vertically shiftable paper carriage.

Figs.15 and 16 are respectively a plan and an end elevation of an endwise slidable paper carriage carrying frame that does not have any vertical movement,

Fig. 17 is a cross-sectional'elevational. View at a line corresponding'to line 88 of Fig. 3 and shows a non-swingable, stationary, type-head cage and the shift mechanism connected to a vertically shiftable paper carriage. This view shows the paper carriage in its normal position relatively to the intermediate printing character on a type head.

Fig. 18 is a cross-sectional, elevational view at a. line corresponding to line H of Fig. 3 and shows the paper carriage in said central, normal position; and illustrates the tending tie plates set edgewise and spaced laterally apart between the end frames. The forward end of each tie plate has a vertical flange 3 which 1s secured in place by a fastener 1 to avertical portion of the transverse front wall of the machine. The rear end of each tie plate has a horizontal flange 5 which is fastened by. a fastener 6 to the horizontal transverse bottom of-a paper carriage guide-way, the rear lip-standing transverse flange of which is indicated by 7. Forwardly of and spaced apart from said guideway. the tie plates 2, the forward upper and under edges of which are respectively in horizontal alignment, support upper and under arcuate and slot-ted transverse guide plates 8 the under plate having an up-standing flange 9 along its front edge. Each guide plate has an inwardly projecting horizontal tooth 10 and an intermediate guide slot 11. The teeth of the two guide plates 8 are in vertical opposition one to another and so also are their slots, the opposed edges of each of which form guide walls with which the bell crank levers described below are in sliding contact.

The front vertical wall 12 of the machine is straightand located forwardly of the guide plates and rearwardly of the keyboard (Eigs. 3 and a The vertical guide slots in the lower portion of the front wall 12are severally for a key lever, and are in dicated by 13, these slots alternating with vertical teeth 13 to one of which each vertical flange 3 of the front end of a tie plate 2 are secured.

The tie plates 2 support a transverse arcuate pivot rod 15 which is located between the horizontal guide plates 8 adjacent the rear edges thereof. This pivot rod supports a series of bell crank levers each being part of a type head actuating mechanism. The two outermost tie frame plates 2 are bent and the intermediate one midway between the end frames is straight. The horizontal guide plate slots 11 and teeth 10 are all radial to the impression point which is midway between the side frames and each of the outermost frame plates 2 is provided with an outwardly projecting horizontal flange 16, the flanges being convergent in the ra- ,dial direction and extending from a rear guide plate edge forwardly.

The front wall 12 extends above the level of the upper guide plate 8 and the frames 1 are each formed at each forward upper corner portion with a transverse shaft supporting'hole 17 in which there is mounted below, but adj acent, the transverse top flange 1-1 of the front wall 12, a transverse shaft 18 on which the forward end of the type head cage is hinged by three annuli 19, which are spaced apart along the length of the cage structure. The two outermost annuli are severally fixed to a forwardly extending end wing of the cage and the intermediate annulus 19 is fixed to the midsectional crown of the front and approximately vertical wall 21 of the cage, the two end wings 20 being angular forward extensions of the wall 21 and being parallel one to another. The bottom wall 22 of the cage is a flat type head supporting plate which extends transversely of the machine. The upper surface of this plate rearwardly of its front marginal portion is continuously smooth; that is, it is formed preferably without any type head guides or grooves and its upper back surface is-the type head support. Its forward margin is formed, between its ends, with a series of radial slots 23 which alternate with teeth 23. Each slot 28 is opposed to a slot 11 of each of the guide plates 8 and each tooth 25 is opposed to a tooth 10 in each of the guide plates 8, one of which is directly over the other. The cage is mounted above the upper horizontal guide plate 8. There are three slots one above another between the radial edge walls of each of which each bell crank lever described below is guided in reciprocating the type-heads. The top plate of the cage is indicated by 2 1 and its under surface is continuously fiat or grooveless. Its forward margin is supported on transversely alined ears of the front plate 21 and its rearward margin is supported by vertical spacing collars'25 and screws therefor between the forward marginal portion of the type-head supporting plate 22 of the top plate 24. The type-heads stand vertical and are indicated by 26. Each is provided with three printing characters in vertical alinement and spaced apart on the rearward edge of the typehead. Each end. of the type-head supporting plate 22 is provided with an integral arm 28 for the vertical spindle of a ribbon spool 29. Each forwardly extending wing 20 is provided with laterally projecting horizontal ears 30, each provided with a fastener hole 31, and the upper margin of the front plate 21 is provided with horizontal ears 82 each having a fastener hole 331. The forward margin of the top plate 2 1 is fastened to the cars 32 and the ends of the top plate are fastened to the ears 30.

For each type-head there is pivotally mounted on the pivot rod 15v a bell crank lever 34 which projects upwardly and forwardly from the pivot rod 15 through a guide slot 11 in the upper guide plate 8, and also through a slot 23 in the cage bottom wall or type-head supporting plate 22 and has its upper end pivoted at 35 to a typehead carrier 36 to which the type-head 26 pivot rod 15 thatthe under surface of the bell crank lever also works in a guide slot l1 ofthe under guide plate .Thus, in the formshown, each bell. crank lever is guided and restrained from lateral vibration by the edge walls in a slot in the typehead supportingwall, by edge walls of a correspondingslot inthe upper guide plate 8, and below the pivot rod by the edge walls ofa corresponding slot in the bottom guide plate 8. r a

The bell crank lever projects rearwardly of the pivot rod 15, and its rearward end is pivotally connected at 38 with a down-- wardlyextending link 39tl1e under end of which is pivoted at 40 toan impression key lever 41 having an upturned rear end portion' 4.2,the upper end of which is pivoted on a transverse.horizontal pivot pin 43 carried in lugs 43 projecting from the back side of theup-standing wall 7 of the paper carriage guide-way. Each bell crank lever 34 has connected to it,-between the pivot rod 15 and its pivotal connection at35 with a type head carrier 36, the rearward end 44 otacoiled spring 45,the 'forward end 46 01"? which is attached to the tip-standing flange, 9 of v the under horizontal guide. plate 8. v The printing characters on the type head i are indicated by 47. i a 1 i the plate by'theupper end of the bell crank The type-head supporting or bottom plate 22 ofthe type head cage, has at one end of its under rear margin a bracket 48 to which there is pivoted at 49 the upper end of a downwardly extending link 50 the under end of which is pivoted at 51 to an intermediate portion of a rocker arm stop 52 the upper end of which is fixed ona transverse rocker shaft 53 the end portions of which are journalled in the side frames 1, under the rear of the horizontal bottomplate 22 of the cageand adjacent the front portion oi?- the transverse paper carriage guide-way. Each. bell crank or type-head actuating lever 34 has its forward end positioned above the supporting plate, the type-head being formed T-shape and one end of the typehead sliding on the plate while the rear end of its stem portion is held horizontally above or type-head actuating lever which is laterally guided as herein described. The typehead, however, islaterally unguided. While by the lateralguidance ofthe type-head actuating lever and by the effect of the relativelylarge contacting surfaces of thepivotedends of the lever and type-head, the type-head may be reciprocated properly to the printing point, yet each of theso actuatedtype-heads has such a capacity of lateral movement that if a plurality of them are accidentally driven simultaneously to the in'ipression point they. will be severally tically elongated slot 58 drawn back by their return springs. This capacity of whatqmay be called automatic release and return from lateral contact of two or more type-headset the impression point 1s of demonstrated practical importance for high speed work on machines embodying this invention.

As shown at the right hand of Fig. 3, the rocker shaft 53 has fixed to it at. 54

a vertically disposed, two armed rocker lever 55. Each arm is alternately engage.- able 'by the-upper and under arms 56 of an endwise movable, thrust lever 57 the forward end of which is supported in a .ver-

vertically adjustable plate 59 mounted on the back side otthe front wall 12 which is formed with a pair of vertically elongated and spaced apart slots 60 (Fig. 10). and is also formed with a slot 58 opposed to the slot 58 in the plate 59'. Clamping screws 61 through the plate and slot 60 serve to hold the plate 59 in a vertically adjustable manner on the inward side ofthe front wall 12 through the opening 58 in which the forward end portion of the thrust lever projects. To a pin 62 on a side of the thrust. lever 57 the front end of a coil spring 62 is anchored, as shown in Fig. 7,'and the rear end of this spring is hooked to an ear 63 on the front central portion ofthe two armed rocker lever 55. Towards its rearward end the thrust lever 57 is provided with an elongated slot 64 which embraces a pin 65 projec-ting from an end of the frame. This thrust lever stands approximately horizontal, and rearwardly of its pivotal support onthe pin 65 its upper and under' arms 56 arein the paths of the two armed rocker lever 55, the'spring 62 keeping an arm 56 in constant engagement with one or the other arm of the two armed rocker lever The rocker stop 52 is provided at its under end portion with a stop finger,,the rearward face 66 of which is adapted to strike against the under front corner surface 7 of the bottom wall 68 of the paper carriage guide way.

' The end thrust lever 57; the coil spring 62; the two armed rocker lever 55; and

of the three printing characters on the type head, its intermediate positioncorresponds to the position of the intermediate character on the type head, and its lowest position corresponds to the uppermost of the three printing characters on the type head. In Fig. 5, the normal position of the cage is (see Fig. 7") in a shown, and in this position both arms 56 are in working contact with the two armed lever 55 above and below the rocker shaft 53; and the link 50, together with the two armed lever are in vertical position, the rocker stop 52 being-then in its intermediate position. The pivots 4:9 and 51 and the link are then on dead centers and the rocker arms stand vertical. In this position the tension of the coil spring 62 pulls the end thrust lever rearwardly, keeping its arms 56 in constant pressure against the front surfaces of the opposed arms of the two armed lever 55. In Fig. 6 showing the lowermost of the three printing characters at the printing point the link 50 is inclined upwardly and backwardly, the upper thrust lever arm 56 is in contact with the upper rocker arm 55, the under thrust lever 56 is out of engagement with the under rocker arm 55 and the rock-er shaft 53 has been rocked in a forwarddirection until the rocker arm stop 52 has moved rearwardly andupwards into engagement with the under side 7 of the front margin 67 of the bottom wall 68 of the paper carriageguide-way.

In Fig. 7 the uppermost of the three printing characters is at the printing point with the back edge of the plate 22 adjacent the upper edge of the forward flange of the paper carriage guide-way, the stop 52 being then in its lowestposition, the link 50 downwardly and rearwardly inclined, and the under thrust lever arm 56 being in contact with the under rocker arm 55 and the upper thrust lever arm 56 being out of contact with the upper rocker arm Thus, the end thrust lever, the spring 62 and the two a-rmed rocker lever having the arms have a cooperative effect whenever the case shift mechanism is actuated in holding the cage bottom in a predetermined position selected by the operator of the case shiftkey, with reference to the relative typewriting effecting position of any one of the three characters and an opposed portion of the platen. In effect, the automatically operating end thrust and rocker arm construction just described constitutes an automatic mechanism for holding each of the three printing characters at the impression point during the final imprinting movement of the type-head; and the operation of this antomatic mechanism is governed by its mechanical connection with the case shift mechanism about tobe described.

At the left hand end of Fig. 3, the case shift mechanism is shown in operative connection with the transverse rocker shaft The cage shift key lever) is upturned at both ends and at the upward bend of its inward end it is provided with a transverse pivot hole 70, the diameter of which is larger than the diameter of the pin 71 on which it is pivoted. The pin 71 projects from the ileft hand end frame- The pin 71 is shown in the form of a headed screw (Fig. 8) an end of which is secured in the end frame with the body of the pin projecting inwardly. Adjacent the inner surface of the frame it is provided with a loose collar 72 which is spaced apart from the head 73 of the screw to form a horizontal bearing on which the shift key lever 69 is pivotally mounted for approximately vertical movement, and is also tiltably supported for a purpose described below. To the left hand end (Fig. 3) of the transverse rocker shaft 53 there is fixed a transverse two armed lever 74 the under arm of which is indicated by 75 and the upper arm by 76 (Fig. 11). To the end of the upper arm. 76 there is pivoted at 77 the rear end of an upper forwardly extending link 78 which between its ends is bent edgewise downwardly at 79 and formed with a forward extension which is lengthwise slotted at 80, this slotted portion terminating forwardly in a. lateral free hooked end 81. To the under end of the under arm 7 5 of the two armed rocker lever 74 there is pivoted at 82 a forwardly extending under link 83 corresponding to the link 7 8 but having an upward bend at St forward of which there is a portion 85 in which there is formed a lengthwise extending slot, a dotted line portion of which is indicated by S6 in Fig. 12. The. slots and 86 are approximately laterally opposed one to the other and through each slot there projects a horizontal screw 87 from the left hand end frame, this screw supporting both links 7 8 and 83 in working position. The under link 83 at its front end has a laterally inturned free hooked end 81 which corresponds and is opposed to the hook end 81. The opposed end surfaces of the two hook ends are spaced slightly apart; and the shift key lever 9 has its upper 'rear end portion indicated by 88 proecting upwardly between the forward end portions ofthe links 78 and 83 as a blade. the forward. edge of which is opposable to the back surface of each laterally projecting hookend S1 and 81. (Fig. 3.) The hooked ends 81' and 81 are opposed but spaced slightly apart and the blade end portion 88, however, is never in ope ative contact with but one of the hooked ends at a time. A coil spring 89 (Fig. 11) has one end securedtothe shiftkey lever 69 between its pivot and rocker hole 70 and its upper end 88, thecoil spring extending rearwardly and having its rearward end anchored on a pin 91 which projects from the end frame. As shown inplan in Fig. the coil spring 89 is positioned so as to slant away from the inward surface of the frame end to which it is anchored at 91. The upper link 78 may correspond to the numerals on the type head and the link 88 may correspond loo engagement on its depression with the hooked end 81 and lntOlDOSltlOIl for-engagement with the hookedend- 81 and vice versa. Between itsfront end and its pivotal bearing at 71 the key lever 69 is shown ,passingthrough a guide 92 which is dimensioned to permitthe lateral tipping of the key lever as already described. The upturned free end of the cage shift key lever 69 is provided with a button 93 to be character-ed, and with an adjacent upstanding finger thrust ear 94, the two being for depressionf and lateraltilting of the cage shift key lever according to the election and Selection of'the o erator, v v

, -As will be seen in" Figs. 14 to 18,"my* )a per carriage shift mechanism without material modification is equally applicable to shifting the carriage vertically instead of shift- I ing the type cage.

Referring to Figs..17 and 18, my flat type head supporting plate 22 is made stationary, extends from side to .side of the machine and is secured on the" upright side members 1,; byscrews 22 or other fasteners. The vertical wall 21 of the cage is.v secured to thisas previouslydeseribed, and also the top plate 24. The guide plates 8 are hung under the plate 22 and fastened thereto by vertical spacing collars 25 andscrews therefor, To, a pairof rearward rocker arms 95 (Fig. 14) rigidly secured to the rocker shaft 53 there are rigidly"attached a long transverse carriage sup-porting rail 106 slotted and pinned at 107 to the arms 95. p 'A convenient form of'paper carriage supported on rail 106 comprises a frame F having upstanding end fork arms 103 (Fig. 15), the frame beingendwise slidable on guide ways 7 and to be provided with the usual escapement rack andescapement, neither of which is'shown. i

Each pair of vertical fork arms 103 form a vertical guide-way 108 at each end of the frame. A guide block 104, in which an end of the platen P is journaled, is slidably mounted in each guide-way.

The carriage supporting rail 106 is loosely embraced by a lengthwise extending, 'U- shaped channel iron guide open along its front side. The back web of this guide "is indicated. by 96. Its forwardly projecting flange is indicated by 97 'and its forwardly projecting upper flange by 98 Its back web 96 is fixed to 'a'dependent web '99 of the paper carriage frame, the upper margin oftheweb'99being fixed at 100 to the usual baclntransversepaper rest 101 of the carriage.

desirable distance.

-The vertical shift positions of the rail 106 loosely embraced by the channel iron guide are controlled and actuated as previously described. i 1

Stops 109 and 110 on a frame end serve to limit the downward and upward shift positions, the stop 109 arresting the downward motion of an arm'95 and the'stop 110 arresting the forwardlyprojecting arm 111 (Fig, 19) whichis integral with a rocker arm 95. Y

The mechanism hereinbefore described ment for presenting any one of its plurality of printing characters to theprintingpoint,

in addition to its printing pressure movement. As shown in Figs. 14 and 15, and

also in other figures, the vertical type-head 26 has its under end sliding'on the typehead supporting under plate 22 of the cage, which is smooth surfaced. The type=head itself is tiltable on its unden end in the fore and aft direction, and the type-head carrier 86'which is rearward extension of the type-head and a portion of the type-- head structure is pivoted by a pivot pin 35 to'the upper end ofthe typeshead actuating lever 34. '1' The pivotal connection is one in which the continuous walls of the pivot pin 1 holes in the lever 34 and type-head carrier And 36 peripherally enclose the pivot pin. as shown in Figs. 14 and 15, on the forward reciprocatory movement of the typehead structure and actuating lever the front walls of the pivotally jointed connection of the lever and carrier strike against a noise absorbing cushion or pad 21* which is fixed to and carried ;by\ the under front rigid corner walls of the cage. The return movement of the thus connected type-head structure and its actuating lever is, in reality.

' arrested by the pad against the tension of thereturn spring 45 which, except for the pad, would cause the parts on the return movement to strike violently "and noisily against the immediately adjacent wall poi; tions of the cage, unless such portions were spaced apart from the most forward pos sible position of the actuating lever 34 and the front end of a carrier 36 by an un- What I claim is: V 1. The c'ombmation, in a typewrltlng'mahead; connected with the bell crank lever; a rechine, of a shiftable member of the typewriting effecting mechanism; with a key controlled shift-mechanism for such member; said shift mechanism comprising a con nect-ion operatively connected with said shiftable member, and ialso comprising a rockershaft/having a fixed, .two armed lever; a pair of endwise movable pivoted links one connected with one end, and the other connected wit-lithe other end of the two armed lever; a laterally movable pivoted shift key lever operatively connectible at the will of the operator with. either link; a return spring; the rockershaft also having'a fixed stop-forming device; and, for

cooperation with such. device, a thrust lever mechanism; a type-head supporting plate provided witlr a series of radial slots the side walls of which severally serve as a guide for a, type-head actuating lever; a seriesof type-head carriers reciprocable on the plateya series of; typeheadactuating levers each pivoted to the front end of type-head; carrier and extending downwardlythrough one of said; slots with its sides in guiding contact with the side walls ofplatehaving a guide slot; a bell crank lever working through said slot, having its sides in. sliding contact with opposed edges of said-guide slot, being pivoted on a fixed pivot under the supportingplate and being operatively connected with the typean impression key lever operatively turn; spring therefor; a slotted guide plate for the-bell; crank lever between: its pivotal connection with the impression key lever and a type-headsupporting-plate; the platen;

and type-head being movable relatively one to the other for opposition of a portion of the platen to a type-head character selected for impression; a case shift mechanism for effecting such selected opposition of the-- platen and a character, the shift IIIGOhtLHlSIlI" comprisingan accessible,.manually operable,

vertically movable and laterally tilt-ableshift key and a pair of links selectively engageable by the shift key at the Will ofthe' operator, and also comprising rockablemeans whereby said opposition to a selected character and of the platen are obtainable.

I. The combination, in a typewritmg mach i ne;o-fan endwise movable platen ;a typehead having not less than three-spaced apart printing characters; a type-head supporting plate having a guide slot; a bell crank lever working through said slot, having its sides in sliding contact with opposed edges of the guide slot, being pivoted on a fixed pivoted under the supporting plate and being operatively connected with the type-head; an impression key lever operatively connected with the bell crank lever; a return spring therefor; a slotted guide plate for the bell crank let er below the supportingplate, the platen and. type-head being movable rela tively one to the other for opposition of a portion of the platen to a type-head character selected for impression; a case shift mechanism for effecting such selected opposition of the platen and a character shift mechanism comprising an accessible, manually operable, vertically movable and later-- ally tiltable shift key and a pair of links selectively engageable by the shift key at the will of the operator, and also comprising rockablemeans whereby said opposition of a selected character and of the platen are obtainable; and an automatically operating mechanism for holding the intermediate printing character in printing position.

5. In a typewriting machine, the combination of an endwise movable, paper carriage with a. swingable type head cage; a shift key controlled mechanism for positioning the cage in printing position; slidably mounted. within thecage, a type head comprising three printing characters spaced apart one above another; and a type head actuating mechanism comprising an impression key lever, a bell cranklever working through an opening in the bottom of the cage and having a pivotal connection with thetype head; a return spring; for the'bell crank lever a horizontal pair of fixed guides; and for the impression key lever a fixed vertical guide.

6. In the combination set forth in claim 3, the shift mechanism being constructed and operable to hold the cage in position for impression by the intermediate character on the type head; and being also operable for shifting the cage from such intermediate position to a lower position and also to a higher position.

7. In a typewriting machine, thorombinw t-iou of'a paper carriage comprisiug a platen type-head supporting means comprising a flat type-head supporting plate provided with a: radial. slot in its front marginal. portion; a; laterally unguided, type-head having a. plurality of alined printing characters; adependent type-head actuating lever. pivotally connected to the type-head and extend ing downwardly through said radial slot; a, fixedv pivot for the under end of the lever; and an impression key lever operatively connected with the type-head actuating lever.

the sides of thelatter being in sliding con tactwith the side walls of the radial slot for restraining lateral vibrationof said lever between its under pivoted end and its upper pivotal connection with the type-head, the fixed pivot being below'the type-head supporting plate. v

8. In a typewriting machine, the combination of a type-head supporting plate pro-' the side walls of such underplatebeing in guiding contact witht'he sides of the typehead actuating lever between its under pivot and its pivotal connection with the type-head structure, 4 j

9. In a typewriting machine, the combination of a type-head supporting plateprovided with a radial slot in its front marginal portion; a laterally unguided type-head-slidable on said plate to and from the impression point; a type-head actuating lever pivotally connected to the front part of the type-head structure and extending downwardly through the radial slot; a guide plate having a radial slot below the typehead supporting plate and through which the type-head actuating lever extends, the side walls of such plate slot being 'in guiding contact with the sides of the type-head actuating lever between its under pivot and its pivotal connection with the type-head structure; and a lowermost radial slotted guide plate located below the under station ary pivot of the type-head guiding lever, the sidewalls of such lever being in guiding contact with the side walls of the radial slot of said'lowermost plate below the fixed pivot of the type-head actuating lever.

10. The combination of a type-head supporting plate having a rearward plain surilaced type-head end supporting portion and a guide slot radial to the printing point forwardly ol the type-head end supporting portion; a type-head having an end slid-ably mounted on the type-head supporting portion and also having a rigid forwardly projecting shank above and out of contact with said plate: pivoted to the forward end of the type-head shank, a dependent type-head actuating lever working through said slot and having its sides in lateral engagement with the side walls of the slot; below the plate afixed pivot for said type-head actuating lever; and operatively connected with the under end of said lever, an impression key lever; and a return spring operatively mounted for restoring the type-head to position of rest following impression; the pivotal connection of the type-head shank with the 4 upper end of the type-head actuating lever comprising lateral vibration resisting surfaces whereby the typ-e-head shank is recip-' rocable without undue lateral'vibration.

,11. The combination of a type-head sup porting plate having a rearward plain surfaced t ype head end supporting portion and a guide slot radial to the printing point for wardly of. the type-head end supporting portion; a type-head having an end slidably mounted on the type-head supporting portion and also having a rigid forwardly projecting shank. above and out of contact with said plate; pivoted to the forward end of the type-head shank, a dependent type-head actuating lever working through said slot and having its sides in lateral engagement with the side walls of the slot; below the plate a fixed pivot for said type-head actuating lever; and operatively connected with the under end of said lever, an impression key lever; and a return spring operatively mounted for restoring the type-head to position of rest following impression.

,12. In a typewriting machine, the com bination of a platen; a series of laterally unguided'type-l1eads severally movable to the, impression point of the platen; for the type-heads, a smoothsurface support having 1 a slot for upward extension theret-hrough of a type-head actuating lever for eachtypehead; a series of such actuating levers, each pivotally connected with a typehead above the support; stationary guides for the opposed sides of each actuating lever; and under the support, operatively connected with each actuating lever, an impression key lever; whereby a plurality of type-heads it forced simultaneously to the impression point into contact one with another will be then movable sidewise for several automatic return under the influence each of a return spring; and for each type-head actuating mechanism a return. spring.

13. In a typewriting machine, the combination of a platen; a series of laterally unguided type-heads severally movable to the impression point of the platen; for the type-heads, a smooth surface support having a slot for upward extension therethrough of a typc-head actuating lever for each type head; a series ofsuch actuating levers, each pivotally connected with a typo-head above the support; stationary guides for the op-- posed sides of each actuating lever; and under the support, operatively connected with each actuating lever, an impression key lever; whereby a plurality of type-heads if forced simultaneously to the impression point into contact one with another will be then movable sidewise for several automatic return under the influence each of a return spring; and for each type-head actuating mechanism a return spring; each type-head having a forwardly projecting stem out of contact with the supportand having its under end in sliding contact with the sup port; the forward end of the stem and the upper end of the actuating lever being pivoted together and provided with opposed bearing surfaces adjacent the pivotal connection; and the return spring having one end connected to the actuating lever and the otherend connected to astationary part of the machine.

14. In a typewriting machine, the com bination of a type-head supporting plate adjacent the impression side of a platen; a platen; a laterally unguided type-head structure having a straight head provided with a printing character, an end of the head being slidably supported and also forwardly and backwardly tiltable on: its end that rests'on the support; a type-head actuating lever pivotally jointed at one end to a' front portion of the type-head structure by a peripheral-1y enclosed pivot pin, the other end of the type-head actuating lever being pivoted on a fixed pivot; an impression key lever operatively connected with the actuating lever; a return spring; and between the pivoted ends of the actuating lever, means for laterally guiding the actuating lever in its backward and forward reciprocating movements; the actuating lever being at an angle to the path of movement of the typehead and having. its fixed pivot below such path.

15. In a typewriting machine, the combination of a type-head supporting plate adjacent the impression side of a platen; a platen; a laterally unguided type-head structure having a straight head provided with a printing character, an end of the head being slidably supported and also forwardly andbackwardly tiltable on its end that rests on the support; a type-head actuating lever pivotal'ly ointed at one end to a front portion of the typehead structure by a peripherally enclosed pivot pin, the other end of the type-head actuating lever being pivoted on a fixed pivot; an impression key lever operatively connected with the actuating lever; a return spring; and between the pivoted ends of the actuating lever, means for laterally guiding the actuating lever in its backward and for-ward reciprocating movements; and in the path of the front walls of the p-ivotally jointed portions of the actuating lever and type-head structure anoise-reducing and structure arresting pad; and stationary means for holding the pad in place, the actuating lever being at an angle to the path of movement of the type-head and having its fixed pivot below such path.

Signedi at New York city in the county of New York and State of New York this fifteenth day of July A. D., 1921.

WELLINGTON PARKER KIDDER.

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