US1221875A - Type-writing machine. - Google Patents

Description

E. G. LATTA. TYPE WRITING MACHINE. APPLICATION mw umso. 1914.

1,92 L'Y. Patented Apr. 10, 1917 2 SHEETS-SHET I.

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NVQ? M ,Mwarweys A .'IIIIIIIIIIIII f E. G. LATTA. TYPE WRITING MACHINE. APPLICATION FILED IANfso. IQII.

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Patented Apr. 10, 19T?.

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A Y' known that lr, llMMrr G. LATTA, a. ortizen racuse, in the county of (lnondaga and tate oli New York, have invented a vnew and useful lmprov-cment in Type-lllrting hlachines, off which. the following is a speci- .derd-ion.y

This invention relatesto typewriting niach'ines havingpivoted type-bars that make the impressions at the front side of the platen, and more particularly to improve- 'rnents in typewriters of this kind in which u andere adapted to be shifted. orplacing tape-bars carry different sets ot type one or another set ot ltype in printing relation to the platen. The invention 1s not,

. hoiveveri necessarily restricted in all of its Aao features `to machii'res oi' this kind.`

This application isa division of my applie-ation 'erial llo. 690,355, 1912.'

The .objet's oi'i the invention are to produce a typeivriting machine of a construction such that, owing tothe location and construction oit some oi the parts and their direct action, it produces greater speed and cert inty in the escapement and ribbon vibrating mechanisms' than has'heretotore been accomplished in machines having shifting y,type-bars; and also .to improve typo- Writing -n1achines in the several respects hereinafter described and set forth' in the claims.`

l: :inthe accompanying drawings, consisting' oftwo sheets: f

Figurell is a fragmentary longitudinal sectionalelevation ci' a. typevvriting machinefembodying the invention.

SZ'is a fragmentary front elevation of theoperating parts of the machine.

,Fig.. 3, is a plan view, partly in section,

I Iof the.ribbon*vibrating and universal bar mechanism. I .v

Fig. .el is a' fragmentary sectional elevation`y of the vibrating, mechanism in line Fig. 5 is a 'fragmentary sectional elevation of va ribbon vibrating' mechanism of modified construction.

Figi. G isa front elevation partly in seci tion thereo'fj refe-rence characters refer to like l figures y .sente 'the lmain frame of 'of' the llnited States, residing at.

tiled April l2,

specification or Letters raient` Pawn-wd Apro 1p, from',

'applcationrled -april lit,y i912, Serial No. 690,355. lDivided and *his application filed. .Tanuary 30, f Y Serial No..815,399.

the machine having` a top plate a; B the platen carriage which supports the platen C; D thecarriage escapement; E one of the type-bars, vwvl-uch are -pivoted in an arc below the platen, so as to swing upwardly and rearwardly to make the impression at the front side of the platen; F one of the levers which are operated by the linger keys and connected by links f to the type-bars' for actuating them. This invention is not concerned with these parts, and they may be of any suitable construction. They4 are illustrated to show their relation and coaction with the other parts of the machine.

any suitable construction but it is preferably mounted as shown, on a bearing d on the rear central portion of the bridge a', and the shaft of the escapement Wheel CZ is provided, as usual, at its front end with a pinion (Z2 which meshes with a rack bar -on the carriage. l? is the movable lever or part controlling the action of the escapement Wheel.

G represents a support or plate on which `,the bearing hangers for the type-bars are mounted. Each of the type-bars 1s provided with two type and the hanger support or plate G is preferably mounted so that it can be shifted for placing one or eanother oiE the two sets of type in the printing relation with the platen. ln the construction shoivn, the hanger support G -is pivoted to the front ends of tivo pairs of arms g g which are connected.respectively to rock Ishafts g2 g3 mounted in suitable bearings on the opposite sides of the main. frame., The hanger support G can bei: shifted b v any suitable means, such, for instance. as a cam lever g4 adapted to bef rocked by a shittingke'v and acting on a. Lroller or lpart gli suit-ablyfattached to the support. K. f The type-bars are pivotally mounted on f the support G by separate hangers or bearings H of suitable construction, one of which is shown in each of Figs. 1 and 2.

L represent-s a curved universal bar which' is substantially parallel with the are of the type-bar, bearings and is supported over the bearings in position to be struck by the type-bars as they approachy the platen, preferably in the following manner:

M represents a bar which is secured, for instance, by screws 1n, Fig. 3, to lugs 1n on the upper central part of the plate G and is provided at its ends with cross arms m2. In the front .and rear ends of these arms, parallel' rock shafts m3 m4 are journaled 4which are provided with rigid depending arms m5. The universal bar has fixed thereto rearwardly extending arms 1nG which are controlling lever d3 of the carriage pivoted to the said depending rock arms The universal bar is thus hung,` so that -it is .adaptedto be moved rearwardly when struck by any one of the type-bars. A suit-- 4able spring 112,7 acts to restore the universal bar to its forward or. normal position. The spring shown is connected at opposite ends to an arm 1n8 on the rock shaft m3 and to an arm m9 on one leg of the center 4a'uide forv the type-bars hereinafter described. The universal bar lis connected to the earriage escapement for actuating it, preferably as follows:

N represents a nearly horizontal link pivoted at its front end to the rock arm m8 and at its rear end to the depending arni of a bell crank lever a which liasa rearwardly extending arm connected by a rod n to the escapement. The bell crank lever 11, is pivoted on a bracket 1i secured to thel supporting bridge for the carriage track. As the carriage escapement is mounted on a fixed part of the machine while the universal bar is mounted on the shifting supporting plate G, the link N is pivoted to the bell crank 1a in a plane midway between the normal' and shifted positions of the pivot which connects the link to the arm 112,8, so that the action of the escapement will be the saine in both positions of the sul'iporting plate G.

By these connections the eseapenient wheel is released every time the universal bar is moved rearwardly by a type-bar, and the spring m7 acts to restore the eseapenient lever as well as the universal bar to the normal position.

O represents the vibrating ribbon `auide or vibrator, which may be constructed and mounted in any suitable way. The vibrator shownhas ears 0 by which it is slidably retained .on a stationary center `druide P for the type-bars, and it is pivoted at its lower end to the front. end of a vibrator lever Q.

The center fluide .shown has downwardly and rearwardly extending' legs p rigidly sevcured to the bar M, preferably by thesepins until the other curing screws for this bar. The center guide slides up or down in front of the vibrator when the type-bars are shifted to different printing relations -to. the platen and always retains 'a fixed position relative to the typebars.

The vibrator O is also actuatedby the universal bar through mechanism, which is constructed as follows: l.

1 and 1 representtwo arms of diiferent lengths which project from a hub R loosely sleeved on the centra-l part of the rock shaft m3. A nut 1'2 screwed on-the shaft m3 and bearing against the hub of the arms 1' 11 retains a tapered stud 1"3 on the rock arm 11i"3 in a hole in the arm fr, whereby the arms 1' 1" are locked'to the rock shaft ne.3 so that they will be rocked when the universal bar is actuated. lVheii it desired to silence the vibrator, the nut 12 is unscrewed, when a spring 1'4 between the arms m:s and 1' will disengage the latter arm from the stud 1"". The arms 1 1" can be reloeked to' the rock shaft by again screwing up the nut 12.

S represents a link arranged with its front end between the arms y1' 1" and extending rearwardly therefrom with its rear end between correspondingly spaced arms s s of different lengt-lis depending from the ribbon vibrating lever O., which is pivoted on the bracket n3. The arms 11 1" ai'e provided with inwardly extendinground-ended pins s sa adapted to enter registering` holes in th' front end of the link S, and the arms s s have similarly arranged pins s4 s adapted to enter registering holes in the rear end of the link S. In the position ofthe link shown in the drawings it engages the pins of the short arm 1Il and long arm s and connects these arms. By moving the link sidewise-it is disenfraved from the )ins s3 S5 and is en- D 21 i gag'ed with the other pins s? s4, thereby connecting the long arm 1 to the short arm 8. Thus by 'shifting' the link S sidewise one way or the other,l the vibrator lever can be given a short or a long throw suitable for using either of two different ink fields on the ribbon. The pins S2 S5' ai'e of such length that the link does not leave one pair of 4 pair has partly entered the holes in the link, thus insuring the readyshiftingof the link. When` however. the link is inoperative connection with one pair of arms, the other pair is left perfectly free. The link is shifted sidcwise for changing; the throw of the vibrator by a plate s provided with upwardly' extending armsliaving slots-sT in which the link S is held from sidewise movement but is per 'mitted to reciprocate freely lengthwise. The shifting' plate is slidablv secured on the har M. for example, b v a .sei-ew NS. Fig. Il, passing through a. slot iii the plate. and has an extension a endinpy in an uptui'iied linger piece lo fated in a convenient position for moving iio manera thevshifting plate til-shift thelink fl. r`the extension st is provided 'withy a'- toothv or Any other .suitable shifting means for the link S can be used.`

.The pinsfor the link Sarellocated so that i when the type-barsjare shifted the'operative pin at the-front end of the link will be moved from a position below the plane of the ope 'ati've pin at the rear end of the link vto .-a- .corresponding vvdistance above that planefand thus produce like movements of the ribbon inboth positions ofthe typebars.

s' seen `in Fig. l, the vih ator lever Q is curved downwardly'and the track supporting bridge is recessed above the lever to enable the lever to move the desired distance, in the limited .roomavailable. The link S is alsocurved'- downwardly so -as not to interfere with the lever Q when the parts are shifted for` upper case-work.

Figs. 'Cr-and IG show a ribbon vil'irating mechanism which is interchangeable with the vilirati1'1 mechanism first described. The universal bar and its supporting shafts ma and m4 are the saine as described, and the vibrator lever Q and escapement connections are also the sa1ne,b`ut instead of the connected' arms r and r used in the first construction. arms U U aroused which are independentlv mounted on the shaft m3 and. are spaced by being seated in slots in a sleeve u which is pinned or otherwise secured to the shaft. The arm u Ifor the restoringl springI nz-T and the link X is made integral lwith the sleeve u. rl`wo separate links u2 and u take the place ot' the single double acting` link S first describeth and theT are permanently pivoted to the arms li and U at their front` ends. and to the arms l] and Q ot lthe vibrator lever at their rear ends. Two short sleeves i; and r are mounted to slide on the shaft m3 outside of the sleeve u. Pins 'i2 and project inwardlv from these sleeves. and each sleeve has a fiat 'spring c" rigidlyy secured to its lower side. .These springs'contactat their ends and each spring has a tooth or projection to snap into the notches along the underside of the sleeve u.

The sleeve u has a hole for the pins r2 r extending ,throughout its length. parallel with the shaft mi, andpin holes in the arms U register with the pins when the parts are in normal position. is shown in Fig. G, the pin is in place to lock the arm l@ to the shaft maand vibrate the upper field otvthe ribbon to and from the printing point. .To

vvibrate the lower field it is onlv'neeessarv topush in the sleeve l* as t'ar 'as it will `iro7 which, owing to the contactingends of the springs r'hfpushes the other .sleeve f" outof locking position and releases the arin U at the same time that the arm lT is locked to the shatt m". ln order to silence fthe vibratingl lit is only necessariY to withdraw the locking pin troni whichever arm may be Yin use, without pushingin the other locking pin. lloth arms lf and U with the links u2 u vibrate together at all times when either arm is locked to the shaft mf, and whichever arrn is locked controls the movement of the other arm through the arms Q' Q and the idle link' The pivots at the ends of the links if and altare .l-:icated vin the same positions as the four pins that connect the link S with the arms r` 1" and .i in the first construction, and 'the same result accomplished in both cases. I

l claim as niv invention:

l. ln 'a tmvpewiitinamachine. the comhination with a platen and a series ot pivoted type-bars, ot'a support for the tvpebars which ,is shiftable to place the typebars in ditl'erent printing relations to the platen, a one-piece curved universal har which shifts with said support and is arranged to be actuated b v the several type-bars as the;l ap proach the platen. a device to be actuated at each type stroke which is mounted in fixed position, and an operating connection connected to said device and to said univer,- sal bar constructed and arranged to produce like action of said device in both positions of Isaid support. substantially as set forth.

:2. ln a typewriting machine, the combination with a platen carriage.. a series ot pivoted typebars. and a device to be actu- 13 ated at each tvpe stroke. ot'a support for the tvpebars which is shiftable to place the type-bars in ditiercnt case printing relations to the platen. a one-piece curved universal bar which is arranged to be actuated by the 105 direct impact of the several type-bars as they approach the platen and is shiftable with the type-har support. and means connected Vto the universal bar and to said device constructed and arranged to correspondingly 11o operate said device in the different printingpositions of the t vpebars.

3. ln a tvpewritingmachine. the conibination with a platen. and a series of typebars arranged to strike the front of the platen. ot a universal bar arranged to be ac tuated bv the type-bars as the;7 approach the. platen. a rock shaft having downwardly extending' armsl connected to the universal bar. an ulnvardlv extendii'in` arm on the rock 120 shaft. a lever pivoted in a fix-ed position and having a di'iwnwardljvv extending arm in rear oi said rock shaft arm, and a link connected to the rock shaft arm and to said lever arm, substantially as set forth.

Jr. ln a tvpewriting' machine. the combination with a platen. and a series of tvpehavingdownwardly extending arms connect-- ed to the universal bar, alever pivot-ally supported in a fixed position 'and'ilmillg'a downwardly .extending arm, extendingarm on said rock v and to said Vposition equally distant-above its rear an upwardlj,T

change the location of the front end of. said link from a position below its rear `end-to a end, substantially as set fort-h. 5. In a typewriting:r machine, the combination with a platen carriage, a series of pvoted typebars, and a device to be actuated at each type stroke, of a shiftable sup-VA port for the type-bars, a universal bar which be actuated by the several tvpesbars as the)y approach the platen and is shiftable with the type-bar support, a'.

f rock-shaft mounted on said shiftable suppoit' and having arms connected to the univei'sal bar. and means' connecting said rock shaft to Vsaid device to correspondingly opie same in the differentprinting po- I s itifons of the type-bars.

nation with a platen and a series of typebars, of a universal bar 'arranged to be actuarms, a linkA connected to said arm ofthe rock shaft and to said lever, and means for shifting said support to change the front 1 'end of said link from a posit-ion below the plane of its rear end to a position equally distant above its rearl end, substantially as set forth. i

7.In a typewriting machine, the combination with -a platen, and a series of typebars arranged to strike the front of the platen, of a. ribbon vibrator lever pivotally mounted below the platen, a universal bar arranged to be actuated bv the type-bars, a rock shaft which is rocked by the universal` bar and has two pivots located at dilferent distances from the axis of the shaft, and a link for transmitting motion from said rock shaft to said vibrator lever, said link being connectible to loneor the other of said rock 55.

shaft pivots for changing the throw of said. ribbon vibrator.

8. In a typewriting.machine, the combination with a platen, and a series of typebars arranged to strike the front oit' the platen, of a ribbon vibrator lever pivotallyr mounted below the platen and having an arniprovi ed with pivots located at different distances from the lever fulcrum. a universal bar \arranged to be actuated by thc type-bars, a rock shaft which is rocked by shaft, a link v its arms, a

ypewritinfs` rmachine, the combibratorlever, said link being connectible to one or the other of said4 pivots of the vibratorlever for changing Vthe throw of said lever, substantially as set forth.

9. I n a typewriting machine, the combination with a platen, and a series of type-bars arranged to strike the front of the platen, of a ribbon vibrator lever pivotall)1 mounted on a fixed part below the platen and having two pivots on one of its arms, a universal bar arranged tobe actuated by the a rock'shaft having downwardly extending arms pivotally connected to the universal bar and having two pivots, vand a link whereby either of the'rock shaft pivots may be operatively connected to one of the vibrator lever pivots at will, substantially as set forth.

10.l In'a tvpewriting machine, the combination with a platen. and a series of typebars arranged to strike the front of the platen, of a ell crank ribbon vibrator lever pivotal y/iiiounted on a fixed -part below the platen and having two pivots on one of universal' bar arranged .to be aetuated by. the type-bars, a rock sha-ft ha ving downwardly extending' arms-pivotallv coin neeted to the universal bar and having two pivots over its central part, a link wherein)y either of the pivots over the rock shaft mayv beoperativel)Y connected to one of the vibrator lever pivots, and means for connecting one of said pivotsA with and simultaneously disconnecting the other pivot from the link at will, substantially as set forth.

11. Ina typewriting machine, the combination with a platen and a series ot typebars arranged to strike the front of the' platen, of a bell crank ribbonvibrator lever pivotally mounted on a fixed part below the platen and having two pi-vots on one of its arms, a universal bar arranged to be artuated by the type-bars, a iock shaft having downwardly extending arms pivotallv connected to the universal bar and having two pivots over its central part, a link u ereb v either of the pivots over the rock shaft ma)r be operatively connected' to one of the vibrator lever pivots, and a shiftable support' for the type-bars, universal bai-,and rock sha ft acting to move the pivots over the rock shaft from one side to the other of the plane of the vibrator lever pivots, substantially as set forth.

12. In a tif'pewriting machine, the combination with a platen. and a series of typebais arranged to strike the front o'lf the type-bars, A

artis of theshpt, and linkage whereby either f 1i'. ln a typewriting machine, the combiot the rocksliait pivots may be operatively connected lto the vibrator lever arm. substantially as set forth. l

13. ln a typewriting machine, the combination with a platen, and' a series of typebars arranged to strike the front of the platen, 'of a ribbon vibrator lever pivotally mounted below the platen and having a depending arm, a universal bar arranged to be actuated by the type-bars,. a rock shaft having 'arms pivotally connected to the universal bar and having` two pivots at difiere ent distances above it, linkage whereby either of the rock shaf-tpivots may be operatively connected to the vibrator lever arm, and means for' disconnecting said operative con- I nection of both4 of the rock shaft pivots, substantially as set forth.

1l. ln a typewriting machine, the combination withaplaten, and a series of type-bars arranged to strike the front of the platen, of

a bell crank ribbon vibrator lever pivotally two bearings for Elli mounted below the platen, two pivots on one ci the armseof the vibrator lever at different .distances from the lever pivot, a universal bar arranged to be actuated by the type-bars, a rock sha' having downwardly extending 'arms pivo ally connected to the universal bar, a pivot arranged over the rock shaft and operatively connected thereto, a link connected to the roch shaft pivot and having the pivots of the vibrator for shifting the link trom lever, and means the other, sub

one vibrator vlever pivot to stantially as set forth..

'. ln a typewriting machine, the combi- I nation with a platen and a series of type'- liti bars arranged to strike the 'front of the platen, of a bell crank ribbon vibrator lever pivotally mounted below the platen,

a universal bar arranged to be struck by the type-bars, a rock shaft having downwardly .extending arms pivotally connected to the universal bar, and two pivots located aty diiierentdistances from the axis of the rock shaft, a link having two pivot bearings at its front end and adapted to connect either of the rockshaft pivots to the vibratorI and means for shifting the link from one rock shaft pivotto the otlier, substan tially as set forth. 16. ln a typewriting, machine, the combination with a'platen, and a seriesol typebars arranged to strike the front olf the platen, of a bell crank ribbon vibrator lever pivotally mounted below theplaten, a universal bar air-ranged to be actuated by the type-bars, a rock shalt having downwardly extending arms connected to the universal bar, and a. link having two interchangeable pivotal connections with the rock shaft and vibrator lever whereby two diderent and tions may be given the bell crank, substantially'as set forth. L

4to the VuniversalV bar, a 4ribbon vibrator nation with a platen, andl ai seriesbi"type-l bars arrange-d to strike the vlront'ot thel platen, of a ribbon vibrator leven"-'pivotallqy'lmounted below the platen, a universalY bar, a rock shaft vibrated by, the ,universal bar, a link having two optionalconnections with the rock shaft -and vibratorlever, and meansVA icorlshii'ting the linkfrom 1one connecting position to the other, substantially as set 'ortL v 1S. ln a typewritingmachine,A the combi" vice which is mounted in xed position, and

an operating connect-ion connected to` said device and to 'said universal bar constructed and arranged to produce like action of said device in both positions of saidsupport, substantially'as set forth.

19. ln a typewriting machine, the combination with a platen carriage, a ribbon vi- -brating device, and a series of pivoted typebars, of a shiftable support for the typebars, a one-piece curved universal bar which is arranged to be actuated by the several type-bars as they approach .the 'platen and is shtable with the type-bars, and means connected to the universal bar and. to said ribbon .vibrating device constructed and arranged to be shifted by the Yshitting of the type--bar support to different positions to correspondingly operate the ribbon vibratin@ device in both positions o the type-bars, substantially a's set forth.

'20. lna typewriting machine, the combination with a platen, and a series of typebars arranged to strike the front of 'the platen,'of a universal bar arranged to beactuated by the type-bars as they approach the-platen, a rock 'shaft having downwardly extending arms connected tothe universal bar, an upwardly extending arm on the rock shaft, a ribbon vibrator lever pivoted in a fixed position and having a downwardly extending arm in rear of said rock shat arm, and a link connecting the rock shaftarm to said lever arm, substantially as set forth.

' 21. ln a typewriting machine, the combinationl with a platen, and a series ot typebars arranged to .strike the front ol the platen, ot 'a universal bar arrangwto be actuated by the type-bars., a rock shaft having downwardly extending arms connected lever pivotally `supported a position and having aidownwardly extending arm, an up-` wardly extending arni on said. link connecting said upwardly eatendmg aljm .to said downwardly extending lever arm, and means for shifting` the type-bars, universal bai', and rock shaft in a Way to change the location of the front end of said link from a position below its rear'end to a position equally distant above its rear end, substantially as set forth. A

22. In a typewritilig machine, the combination with a platenf and a series of typebars, of a universal baiarranged to be actuated by the typeebai's. a rock shaft having an ainl connected Ito the universal bar, a shiftable support fothe type-bars and rock shaft, an arm on the rock shaft, a ribbon vibrator lever pivoted in fixed position in 15 rear of said arms, a link connecting said arm of the rock shaft to said lever, and means for shifting said support to change the front end of said link from a position below the 'plane of its rear end to a nosition 20 equally distant above its rear end. .abstantially as set forth.

Witness my hand, this 26th day of Janu-

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