US1713010A - Typewriting machine - Google Patents

Description

www 14 w29@ E. 21. @Tn-www TYPEIWRTING MACHINE Filed Sept. 25, 1925 3 Sheets-Sheet lll tl il am a ,amm up ill i alle nel" lil a application tiled acptemher all, tattili. llerial lilo. altri-ltd.

This invention relates to typebar systems lor typewritin g machines, and has particular reference to that class ot machines wherein the type-bars are endwise slidable to and `trom the platen.

ll lea-ture et the invention is'the provision ol a simple type-bar action, which will be eompactly arranged i'or sliding movement ott the type-bars against the platen.

Tn certain typewriting machines, for eaample, as illustrated in the patent to Gr. ti. Going, No. 1,305,091, dated ll/lay 27, 1919, type-bars are mounted iior sliding movement radially to the printing point. The number of type-bars necessary to provide a full complement oit printing characters for a standard machine is such as to occupy a sub stantially great included angle, with the result that the type-bars disposed adi aeent the sides of the assemblage slide obliquely against .the platen, and because ot this obligue movement, their types have a tendency to slip sideivisc as they engage at the printing point. Such sidewise slipping causes blurred work.

Tn previous iront-strike machines, the typebars have usually been mounted iter radial swinging or sliding movement to the printing point, liorming a narrow system, and hey-levers have been disposed parallel to one another in a much wider system. The neces sary connecting means have included levers, linlrs, etc., with complicated bends and movements to engage both members, and'oitter the adjoining connecting means have differed trom one another because oli variations in the relative positions of type-bars and lreylevers. With the present invention, the tendency towards sidewise slipping ot the type at 'the printing point is reduced to a minimum, insuring a betterI quality oiE worlr, as well as a laster operating machine. This is accomplished by arranging the type-bars in two rows, one above the other, said rows ot typci bars being inclined towards the printing point in a vertical plane, and the individual bars being radially disposed in a horizontal plane. lach type-bar is preferably provided with tour type-characters, and is operable by either one ot a pair oi lreys. @ne lrey oit each type bar slides the typabar rectilincarly against the platen, while the other lrey ot" the -bar shitts the typebar vertically at the same time as itmovea against the platen in order to bring the second pair oltcliaraeters-to theA printing point.. The platen may also be shiclftn ed, as-is customary, lor uppercase characters. lll/'ith this arrangement, a standard tour-banlr. lreyboardhaving lorty-two lreys may be used in combination with twentybne typebarsl Because ot the 'tact that the type-bars are vnested in two rows, the spacing between them may be less than has heen eustomarylieretotore, with the result that a small included angle'is occupied by the series ot 'type-bars, whereby the vtype-bars will not strilre the platen so obliquely..

il teature ot the invention resides in the provision ot a compact type-action o enti-eine simplicity. This is accomplished by arranging the hey-levers radially about the center in line with the printing point, whereby each key-lever is disposed in substantially the same plane as its corresponding rearwardly-strain ing type-bar. Thus, no complicated bends are required in the various parts torming the connecting means, simplicity is secured, binding oit parts is avoided, and the manutactun` ing cost is greatly reduced. The type-bars are pivotally supported on an arcuate rod,

the center ot the arc being in line with the printing point, and the hey-levers radiating it'rom the center.

till,

@ther teatures and advantages will hereinafter appear.

Tn the accompanying drawings, Figure 1 1s a top plan view ot" a typewritmg machine, embodying the invention, with parts broken away, and other parts in section.

Figure 2 is a vertical, longitudinal, sectional'view, through the machine, showing the parts in their normal positions.

lligure 3 is a tragmentary view similar to liigure 2, showing one ot the typebars strilring the platen.

Figure ll is a diagrammatic view ot a torna wherein the type-bars have a shorter strolre, eachtype in the lower' row being in vertical alignment with a type in the upper row, the

4types in each row being contiguous or nearly touching one another.

ln carrying out the invention, a typewriting machine trame 1U ot any prelerred term having across-piece l1, pivotally supports on a rod 12 a series ot lingerdrey-levers 13., The pivotred la is arcuate in shape, having a center ell curvature in line with the printing @lll Figure 1. Acomb-plate .vertical slots, acts as `a kward ends of the key-levers 13, holding them against lateral displacement, and carriesa Ustop-member 15, which limits in their normal positions.. i

j 17 on the frontbar 18 of the 0f which actuate bell-crank-levers 22,and 23,

' number, and

point, and the key-levers are dis osed iin divergent relationship, as clearly s vownin 14, having necessary guide for the formovementy of the key-levers, and holds them Coil-springs 16 draw the levers 13 upwardly against thestop 15, said springsbeing anchored to a lplate machine-frame. As the key-levers' 13 are depressed they engage projecting pins 19 carried by the lower extremities of 1inks-20 and 21, the upper ends which are pivoted at 24 to the head 25g of the machine. A lslotted plate 25, held by the front bar 18, yfuides -`the lower ends of the links 20 and2l, each link being positioned between a pair of key-levers, 13, and may be operated by either one of the levers of that pair.4 i f; 4

Type- bars 26 and 27 slide inwardly to a .printing point on a platen 28,-motion being imparted to them bytheflongarm of bellcrank-levers 22 and 23, respectively; TheI type-.bars arefnested radially in two tiers or rows, one' abovethe other, .and-,inclined vlt0- ward the printing point, the numeral 26 designating the type-bars in the lower row, andthe numeral 27 referring to those in thev upper row. Each type-bar carries a plurality of printing characters, here shown as four in designated by the vreference characters 29, 30, 31 and 32. On simply sliding a type-bar 26 inwardly, the printing character 31 is presented to the printing point, and by shifting the platen 28 to the dottedline'position vin Fi u re 2,', an imprint of the character 29 may e obtained. Stationary guides 33 support the type-'bars in co-operationvwith slotted plates 34 and 35, sulicient clearance being provided between the .guides 33 to allow for shifting the type-bars in a vertical plane to present the secondset of printing characters to the printing point.

, Vertically-disposed type-bar-supports 36 guide the inner or rear ends ofthe type-bars 26, having cylindrical bearing membersv 37 engaging in slots 38 in the type-bars. Levers 439, pivot-ed at 40, shift the lower type-barsupports 36 ,through engagement of their slotted ends 41 with projecting pins 42, movement being imparted to the levers by links 43 connected at 44 to one of alternate pairs of key-levers 13. In the same manner, levers 45 shift` the 'upper type-bar-supports through the instrumentality of links 46. By this arrangement, the type-bars in each row are shifted in opposite directions, those in the lower row being moved upwardly, while those in the upper row are moved downwardly, but it will be obvious that the two rows may be moved .in the same direction, either up or the upward. 1

down Stop-pins 47 limit the movement of the type-bar-supports 36, and after such movement is arrested, further depression of the key-lever is possible,because ot' a yielding connection between its link 43 or 46 andv the corresponding lever 39 0145.

The upper extremity of each link 43 and 46 is slotted, as at 48, for the reception ofa pin 49, and coil-springs "50 are connected, as shown, between the links 43, 46 and the levers 39,45. By this arrangement, as one of the links is moved downwardly by depression of a key-lever-13, vthe pin 49 will not, at first, be

`engaged, b ut will slide .in the slot 48, while the springs 50 provide a yieldable connection between, the operativef members.` A typeguide 51 receives the type-characters immediately in front of the platen, and guides them to the printingpoint, suiicient clearance being provided, as shown exaggeratedly in Figure 3, to allow free entry and withdrawal of the type.

The links 43 or 46 are connected to oneof alternate pairs of key-levers 13, from which it will be evident, that upon depression of one key-lever of a pair, such as 13, the type-bar 26 will be moved inwardly towards the platen, by the link 2 0, and at the same time its typecarrying end will be raised verticallyby the link 43 to' position the eharaeter'32 to the printing point. Depression of the next keylever 13b will operate the same link 20 to slide the same type-bar inwardly, but having no link-connection 43 will notshift the type-bar vertically, thus presenting the character- 31 to the printing point. Similarly the joining pair of key-levers 13 may be depressed to operate an upper type-bar 27. One key is 13c voperating the link 21 to move said type-bar inwardly towards the platen, and at the same time its support 36 will be drawn downwardly I bythe link 46 to presentthe character 31 to the printing point. The other key of the pair is 13d to o erate the same link 21 to slide the type-bar 2 to the platen, but having no linkconnection 46. The type-face 32a will be present at the printing point of the platen when the platen is shifted upwardly to the i dotted position. -It is obvious that4 the depression of the two keys 13n and 13 will' present the two type-faces 29 and 30 of the type-bar 26to the printing point, and the adjoining pair of keys 13c and 13d will pre- 'sent the two types 30a and 29 to the type-bar 27 to type in case-shift characters.

From the foregoing, it will be evident that I have provided an improvedsimplilied typeaction for typewriting machines, wherein each type-bar and its respective key-lever are in substantially the same vertical plane. By this provision a simple connecting means is possible, and the parts including the connecting means may be duplicated for each typebar, thus greatly reducing the cost of manufacture.

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universal bar is disposed in the'path. ot movement nt the keylevere ldand conn neeted to an escapeinentfmeehanisin et any ordinary or preterreol torna, whereby the i kplaten is letter-spaced as the typingl pro1 gresses. 4

rlthe distance through which the typelrar slides in its travel to the platen may be varied in accordance with the particular design olf the machine. ln the construction which has ust been described, the types olf the tvvorovvs type-bars are staggered or not in vertical alignment. ln l-ligure Il, a ditterent arrange inentis diagrainmatically illustrated vvhcre- ,i in the distance betvveen the types in their normal position ot rest, and the platen, has been decreased. 'llhe types oit the tvvo rows are arranged in vertical alignment,`each type in the bottom row being directlyl beneath a type in the upper rovv, and the types being packed closely in each row, or the distance'betvveen the types in each row being reduced to a minimum. `When this arrangement is used, the type-bars 53 and 54 may be cut away, as at 55, to provide proper clearance between the parts in the vert-ical shitting operation, othervvise'they various connections are similar to those already described.

The keys having the same depth of stroke at Figure l as at Figure 2, the bell-crank arms Q2 aregmade longer, since the stroke'ot the type at Figure Il is much less than at- Figure 2, llt vvill be understood, however, that the types at Figure l can be placed farther away trom the platen but still compacted together, thus keeping the type-system as narrow, and gaining the advantage ot having the type-bars work in more nearly parallel planes and strike 4 the platen more srpiarely than at Figure l. Variations may e resorted to Within the scope ot the invention, andportions et the improvements may be used vvithout others.,

l-laving thus described my invention, ll claim: i

l.- ln a typevvriting machine, the combination vvith a platen, ot type-bars nested radially in tvvo tiers about the printing point, each type-bar having a plurality of characters arranged in pairs, movable means -tor guid ing the type-bars to the printing point, typebar-operating key-levers, and yieldable connections between certain ot said keyelevers and the movable guiding means.

2. ln a typewriting machine, the combination with a shittable platen, ot a slidable typebar having sets et characters thereon, a pair oli key-levers, type-bar driving connections betu'een the type-bar and both keydeversand operative by both ot the keyelevers to move the type-bar rectilinearly, and type-bar litt ing connections between the type-bar and one ot the key-levers, said driving and lifting connections cooperative to move the type-bar both rectilinearly and vertically to bring a did'erent set et characters to the printing aora tit point, one key-lever and its connections -being operable independentlyet the other keylever and its connections. A

- El', ln a typevvri'ting machine, in cornbiimeu tion, revoluble platen, a series otslidable type-carriers arranged in tiers about the Vprintiung point and each having a plurality et types, a pair ot key-levers t'or operating each 'type-carrier, and means operatively connected to one key et each pair ter displacing -the type-carrier, whereby both keys will actuate the same type-carrier and present didera ent types to strike the platen.

l. ln a typewriting machine, in combination, revoluble platen, a series` et slidable type-carriers arranged in tiers about the printing point and each having a plurality of types, a pair ot key-levers tor operating each type-carrier, a shiiitable support torI the rear end ot each type-carrier, av link connecting each type-carrier with one et each pair ot key-levers torshitting the type-carrier vertically to present a dill'ercnt set ot types to the printing point, and means including a link engageable by both keylevers to move the tyliiecarrier rectilinearly against the platen.

5. ln a typewriting machine, in combination, a revoluble, platen, a plurality of slidable type-bars arrangedrin tiers, one above the other, each type-bar having a plurality of types, a plurality ot keydevers, and means including links engageable by the key-levers to move the type-bars rectilinearly against the platen, cach link being engageablc by tvvo key-levers.

6.' ln a typewriting machine, in combination, a revoluble platen, a plurality ot' slid,

able typeebars arranged in tiers, one above the other, each type-bar having a plurality ot types,y a pluralit)v ot key-levers, means including links engageable by the key-lcvers to move the type-bars rectilinearly against the platen, each link having its lower end disposed betiveen tvvo adjacent key-lcvers, and means tor 'moving the links downwardly by actuation of either ot said adjacent key-levers.

'l'. ln a typeivriting machine, in combination, a revoluble platen, a plurality ot typebars arranged in tiers, one above the other,

the 'type-bars being inclined to the printing` point and having a plurality ot types, a plurality ot key-levers, ineens tor selectiyely moving the type-bars rectilinearly against the platen by actuation oil the keylevers, and means tor additionally shitting the type-bars in a vertical plane by actuation olf halt the number et key-levers.

8. lln a typeivi'iting machine, in combination, a revoluble platen, a plurality oi rows offtypebars, each having a plurality ot types, a plurality et key-levers, means including a set of links toanove the type-bars rectilinearly against the platen, said links being op erated by their adjacent key-levers, verticallyshit`tahle supports tor the rear ends ot set o f characters to the printing point.

the't -pe-bars, and means connecting alternate a keyevers wi'th saidl shiftable supports` to displace theV type-bars and present a diierent affront-strike typewriting machine, the 'cifombination `r with` a shiftable platen, of

type-barsfnested radially about the'printingpointfachtype-bar having more than two 'types,.-i'1'idividually movable Supports for the type-bearing end of each type-bar, keylevers laconnection between eaehty p vadjoining key-levers, :where y` either Vkeylever will niove the type-barrecln'linesfrly nisxnbetween the-' movable support of each type-har' and one-"of two adjoining key-levers,

" vvoperabletojshitftthe type-bar to present addif /tional vchariicters to the printing point, each1 key-lever being either one the key-levers willindependently actuate the type-bar, and means including connections between one of the key-levers and the type-bar, operative to shift the typebar in a vertical plane simultaneously withn operation of some of the 11. In atypewriting machine, the combi-` Vnation with a platen, of a series of type-bars,

the rectilinear movement thereof.

arranged in two rows, one above the other, a

eries of key-levers,'f-meansfto slide. the typekation of the key-levers', and additional. means `for shifting one rowfatype-barsupwardly,

ars rectilinearly against the platen by operandthe other row downward-ly to present different characters to theprinting point. A

t 1 2.. In a typewriting machine, the combination with a platen, of a series of type-bars' arranged in v'two rows, one above the other and Vinclined toward the series of key-levers,- means-to slide the typeplaten by oparranged in two rows, one above the other and inclined toward the printing point, a series of key-levers, means to slide the typebars 'rectilinearly against the platen by operation ofthe key-levers, and 'means to additionally shift the lower type-bars upwardly, and theupper type-bars downwardly to present different characters to l the printing point.

e-bar ,and two?KL printing point, a..

and means to addi- 1.4.-. Inv atypewriting machine, the combination witha platen, of a series ot type-bars arranged in two rows, one row above and the other ro'wbelow the printing line, and both rowsminclined towards the printing point, a series of key-levers arranged in pairs, means operative to slide each type-bar rectilinearly against the platen by the depression of either one'ofapair of key levers, and means opera- .t ivel connectedxto one key-lever of each pair to e 'ect a vertical shift of a type-bar either .up or rdownaceording to' a predetermined plan, to present different characters on tlic same type-bar to the printing point. u 15. n^a typewriting machine, the combination with a platen, of a series of type-bars arranged in two rows, one above the other and inclined toward the printing point, a `series of key-levers, means to slide the typebars rectilinea'rly against the platen b y operation 'of the key-levers, and means to verti- -Lcally shift the independent type-bars in each row to present diii'erent characters to the printing point, the .type-bars; inxone row being shiftable in thelopposite directionvfroin those in the other row.

16. In a typewriting machine, the combination with a platen, of a series of type-bars arranged in rows, one ahov'e'the other, a series of key-levers, slii-ftable supports for the type-endsof the type-bars, means 'for'sliding the type-bars---rectilinearlyagainst the -`platen byoperation of tliekey-le'vers, and means for shifting the type-bar-supports by key-levers.

17. In atypewriting machine, the combination with a platen, of a series of type-bars arranged in rows, one abovethe other; a series o? key-levers, fixed supports for one end of the type-bars, vertically-movable supports for the other end of the type-bars, means for sliding lthe type-bars rectilinearly against t the platen by operation of the key-levers, and

nans for operating the vertically-movable supports by actuation of certain of the keylevers.

18. In a typewriting machine, the combination with a platen, of a series of type-bars arranged in rows, one above the other, a series of key-leversVfiXed fsirpports for one end o f the type-bars, vertically-movable support for the other end of the type-bars, means for sliding the type-bars rectilinearly against the platen by operation of the key-levers, and means for operating the vertically-movable supports by actuation of certain of the keylevers, the type-bar-supports of one row being movable in the opposite direction from those of the other row.`

19. In a typewriting machine, the combination with a platen, of a series of typebars arranged in rows, one-above the other, a series of key-levers, fixed supports for one end of the t pe-bars, vertically-movable snpports for t e other end of the type-bars,

meansior sliding the type-bars rrectilinearly against the platen by operation oA thelreylevers, and means for operating the vertically-movahle supports by actuation off certain `-of the key-levers, the type-bar-,supports of the fjlower row heinginovable upwardly, and the 7 type-,bar-Supports ofthe upper roW Ibeing' niovable'downwardly to Apresent additional characters tothe printing point.

20. ln a typeWritn-g4 machine, the combination with a platen,foi' a series of type-bars nested radially in two tiers about ,the print- -ing pointor slidingmovement againts' the .means connected vto one key-lever of the pair Y simultaneously shift the sametype-bar lup or down in a Verticaliplane to the typingposition.

21. In a typewriting machine, the com- 'i hination with a platen, of type-bars nested radially in two tiers rbefore the printing point, said' type-bars being inclined toward' the, printing point and having the type- 4.characters inthe tWo pairs in vertical alignment, key-.levers 4operative inv pairs and mountedtin' divergent relationship, each pairl of key-levers being in substantially the sanne` plane at its type-bar, and connecting xn'eans to selectively'slide-atype-bar or case-shift and slide a type-bar inwardly against the platen by the depression of a 'key-lever of a pair fof key-levers, said means including a single linkconneetion to one key-lever of a painand a double link-connection' to the other key-lever o the sarnepair.

BURNHAMC. sTrcKNEY.

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