US966957A - Type-writing machine. - Google Patents

Description

JOHN T. SCI-IAAFF, OF WASHINGTON, BISTRICT 0F COLUMBIA, SSEGINR Ul' TYPEWRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A. GORRATEN @E N JERSEY.

. Specification of Letters Patent.

TYPE-WRITING MACHINE.

Patented Ang.

Application filed July 2, ISQ. Serial No. 5G5,555.

To all whom/it may concern.

Be it known that l, JOHN T. Sonar/rrr, citizen of the United States, and resident of Washington, District of Columbia, have invented certain new and useful Improvements hereinafter appear, my invention consists in y the features of construction, arrangements of parts and combinations of devicesto be hereinafter described and lparticularly pointed outin the appended claims.

In the accompanying drawings, Figure 1;

is a fragmentary vertical central fore and 4 aft'sectional view of sufficient number of parts of the typewriting machine to illustrate my invention in its embodiment therein. Fig. 2 transverse sectional view of` the saine, the section being taken on the line mo-f Fig. 1 and looking in the direction of the arrow at said line. Fig. 3 isa diagrammatic side elevation of one of the center type actions, the parts being shown in the positions they assume when the type bar is in the printing position.

I have shown my invention embodied in a front-strike machine, although it should be understood that from certain aspects of my invention features thereof may be embodied in other styles of typewriting machines. Moreover, from certain aspects of my invention it is not essential that features of the invention be embodiedv in a shiftii g basket typewriting machine. l y

4The frame of the machine comprises a base 1, corner posts 2 and a top plate 3. A cylindrical platen 1i, diagrai'nmatically shown in the drawings, is mounted in a suitable carriage (not shown) which'travcls across the top plate from side to side of the machine. Type bars 5 are segmentally arranged 'and are mounted on. a pivot wire 6 and work in segmental slots 7 a in a type bar segment 7. The type bars are mounted 4to swing upwardly and rearwardly to the printing position, as shown in Fig. 3. The

rment to be moved therewith will hereinm v4after more clearly appear.

tail or heel of each type bar provided lwifi-h an inclined slot or cutout 8 through which ne projects a headed pin 9 which extends later ally from an upright sub-lever lil of the third orderipivotcd at its lower end on pivot wire l1 and received in a liferf or guide slot 12 in a bar 13. The sub-levers are of varying` lengths from the center to the sides of the system and terminate at their upper ends in an arc which corresponds to the are in which the type bars are arranged. Thus l from an inspection of Fig. 2'it 'will he seen that the sub-levers 10 at and near the center of the machine are upright stra ht suhlevers throughout their lengths and are con nected in 'the manner described with their respective type bars. The sub-levers 10 near the sides of the machine are bent inwardly at their upper ends, as indicated at la?, to compensate for the difference in width hetween the system of lrey levers and the. system of type bars.

The cross bar 18 co stitutes a l frame provided with upright si' 15 connected at their upper el wardly extending arms l@ on the segment so that the bar 13 which Luppers; the fulcrum 11 of the system of subdev 10 is rigidly connected to the type bars llhe uiiright arms 15 are pivotally connected by shoutdered pivot screws 17 to forwardly entend,-v ing parallel crank arms or linlrs i8 which extend forwardly from and are tinted to parallel rock shafts 19 supported in hearings in depending lugs 2O so as to afford a verticai shifting movement of the type bar segment and the system of sub-levers 14. Rods or arms 21 are secured to the type bar segment and project forwardly therefrom and sup'- port a segmental strip 22 sheathed with the pad 23 to support the forward cnrs of the type bars. A shift key lever is pivoted to the right-hand side in the base of the r chine', as indicated: at 25. The* 'forward arm.

of this lever carries a shift key 26 and the rear arm of the lever is bifurcated e t 27 for -iperation with a .pin 28, projecting laten ally from the bar 13. A depression E the shiij key1 is therefore effective to shin' framr comprising the cross bar l?, carries the system ofsub-levers l@ and type bar segment upwardly around the parallel links or arms 18 to change the case posltion of the types relatively to the platen 4.

Angular key levers 29 are 'plvoted on a pivot rod 30 Which-extends from side to side of the .machine and is secured at its ends in the base of the machine. These angular key levers are provided with horizontally'dis- -posed arms which extend forwardly differa series of straight sub-levers 35 of the third order, said sub-levers belng fulcrumed on a pivot rod 36 which extends from side to side of the machine and is secured at its ends in the rear corner posts 2. The sub-levers extend downwardly from their fulcrums in an opposite direction from the sub-levers 10.

f In other words, the two series of upright sub-- levers 10 and 35 extend in opposite directions from their fulcrums, one series 10 eX- tending' u wardly` and the other downwardly an the two series of sub-levers are parallel when at rest at least throughout a portion of their length. rIhe sub-'levers 35 may be of a uniform length, although there is a variation in the effective lengths of the' levers as will hereinafter' more clearly appear. The two sets of sub-levers 10') and 35 are connected by substantially horizontally disposed links37 which are at progressively higher elevations from the center to the sides y of the machine. These links are of uniform length and the points in the lengths of the associated sub-levers l0 and 35 Where the links are to be connected to the levers may he readily determined by moving the type bar to the printing position as shown in Fig. 3 and depressing the associated finge` key the requisite distance.A Av link 37 may then be maintainedl substantially in a horizontal position and positioned with reference to the associated sub-levers 10 and 35 until the ends of the link are situated in median planes through the sub-levers, as indicated .by the dotted lines b and c in Fi 3. This will indicate the proper points o `connection of the link with the associated sub-levers.

It will be observed that the links 37 connecting the two sets of sub-levers affords a relative shifting movement between them during the case shifting movement of the type bars; that during thisI case shifting movement the key levers and sub-levers 35` remain fixed while the .sub-levers l() shift with the type bars and turn the links 37 around their rear-ends where they are pivotally connected to the sub-levers 35. Froma comparison of Figs. l and 3 it will be seen that lnormally the sub-levers 35 and 10 are substantially parallel, Whereas when a printing key is depressed the associated pair of sub-levers move' into converging lines, as' shown at b e in Fig. 3.

The sub-levers 10 extending to different vheights from their fulcrums for coperation with the series vof segmentally arranged type bars have dierent angular movements and 'different leverage. In order to compensate for this variation in leverage and angular movements of the sub-levers l0, and to compensate for the variation in leverage produced by the variation in the length of the horizontal arms of the key lelIn this manner I am enabled to providea uniform leverage throughout the system and,a uniform extent of dip of the -keys at the keyboard and to com ensate for the variations in leverage at di erent points in the system and to compensate for the variation in angular movements of the parts.

I have hereinbefore stated that the sublevers may be of a uniform length, although their eifective lengths vary. This is by reason of the fact that the .connecting links 37 are connected to the sub-levers 35 at different points in the lengths thereof and at different distances from the fulcrum 36, whereas the keylevers are connected to the sub-levers 35 at uniform distances from thel fulcrums of the sub-levers 35 and the key levers. It is immaterial therefore whetherl the sub-levers 35 be of a' uniform length or be made only of the lengths necessary `to actuate their respective links 37.

It will be understood that the 4open ends 38 of the slots 8 in the type bars enablethe headed pins 9 on the sub-levers to be readily seated in said slots. It will also be observed that the slots 34 in the sub-levers 35 -are enlarged at their upperends, in the nature of buttonhole slots, to receive the heads of the pins 33 on the angular key levers in order to facilitate an' assembling of the parts.

By the present construction I not alone provide a substantially uniform leverage and a uniform dip of the keys throughout the system, but I also provide an acceleration of the type bar in its approach to the the sub-levers lO working in the inclined slots 8 in the t ype bars. .Each key lever and .printing position by reason of the pins 9 on 4 the parts controlled 4vthereby are restored to normal position by a restoring spring 39, although additional restoring springs may be employed if desired.

5 The present invention has some ot' the same objects in view as my cases Serial Nos. 499,228, 499,229 and 499,230, but the claims 1n the present case are restricted to features not embodied in said prior cases.

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

lV hat I claim as new and desire tosecure by Letters Patent, is

- ll. In a typewriting machine, the combination of a shiftable type bar segment, a type bar carried thereby, a key lever, a subdever Shiftable With said segment and operatively connected with the type bar, a second sublever controlled by said key lever, said sublevers being ftilcrumed at opposite ends and extending in opposite directions from their fulcrums, and means for operatively con: nectingsaid sub-levers to aiiord a relative shifting movement between them when the type bar segment is shifted.

2. In a front-strike typewriting machine,4

the combination of a shiftable type bar` seg- 4ment, a type bar carried thereby, a key lever, a sub-lever shiftable with said segment and operatively connected with the type bar, a second sub-lever controlled by said key lever, said sub-levers being fulcruined at opposite ends and extending in opposite directions from their ulcrums, and a link for operatively connecting saidsub-levers to afford a relative shifting movement between them when the type bar segment is shifted.

In a typewriting machine, the combination of a shiftable type bar segment, a type bar carried thereby, a sub-lever of the third order pivoted on and shiitable with said segment and operatively connectedv with Said type bar, a second sub-lever of the third order pivoted on a fixed portion of the machine, a link connecting said sub-levers, and a key lever operatively connected with said second sub-leve1. 4:. In a typewriting machine, the combina- ,50 tion of a shiftable type bar segment, a type bar carried thereby, a sub-lever of the third order pivoted on and shiftablerwith said segment and operatively connected with said type bar, asecond sublever of the third order pivoted on a fixed portion of the n1a chine, said sub-levers being normally substantially parallel and extending in opposite directions from their fulcrums, a link cor.- necting said sub-levers, and a key lever operatively connected with said second sublever.

5. In a front-stilte iypewriting machine, the combination of a shittable type bar segment, an upwardly and rearwardly striking 55 type bar carried thereby, an upright sublever ot the third order pivotetl on and shiftable with said segment and operativel)Y connected with said type bar.y a second upright sub-lever otf the third order pivoted on a lixcd portion ot the machine, said snbvmy levers extending in opposite directions from their fnlerums, a link connecting' said sublevers, and a key lever operatively eonnect ed with said second sub-lever.

t5. In a ty cwriting machine, the combination of a shiftable type bar segment, a type bar carried thereby, a key lever, a pair of intermediate sub-levers of the third order,

one of said sub-levers being carried by a tired portion of the machine and the other sub-lever being carried .by and shiftable with said segment, the sub-levers being normally substantially parallel throughout at least a portion of their lengths and moving into converging lines when actuated, and a g5 link connecting said sub-levers and aording a relative shifting movement between the sublcvers when the segment is shifted.

7. In a typewriting machine, the combination of a series of type bars, a series otsublevers operatively connected with the type bars, a second series of sub-levers, a`series of key levers operatively connected with said second series of sub-levers, and operative connections between each associated pair of sub-levers, said operative connections being at varying distances from the fulcrums of both series of sub-levers.

S. In -a typewriting machine, the combination-of a seriesof type bars, a series of sublevers operatively connected with the type bars, a second series of sub-levers, a series of key levers operatively connected with said second series of sub-levers, and links connecting said sub-levers, the positions of the links varying with reference to the fulcrums of both series of sub-levers.

S. In a typewriting machine, the combination of a shiftable type bar segment, a series of type bars carried by said segment and shiftable therewith, a series of sub-levers operatively connected with said type bars and shiftable with said type bar segment, a sec ond series of sub-levers carried by a fixed part of the machine, a series of key levers operatively connected with said second series of sub-levers, and links which connect said sub-levers at varying distances from the fulcrums of both Series of sub-levers and afford a relative movement between the two series of sub-levers when the segment is shifted.

l0. ln a typewriting machine, the combination of a shiftable type bar segment, a series of Atype bars carried by said segment and shiftable therewith, a series of sub-levers of the'third order varying in length and operatively connec'ted with said typey barsl and shiftable with said type bar segment, a second series of sub-levers of the third order varying in effective length and carried by a 130 swinging &

.fixed part of the machine, a series of key levers operatively connected with said second series of sub-levers, and links which connect said sub-levers ,at varying distances from the fulcrums of'jbothl seriesof sublevers an'dafi'ord fa relative movement between the two series of sub-levers when-the. segment is shifted. 11. In a front-strike tyfpewriting machine,

the combination of a shi table type bar segment, alseries of upwardly and rearwardly y. typebars and shiftable with said .type bar vv.sagn 1 ent, a second series of upright subde-4 .v'ers `of the thirdorder varying in effective l length and carried by a Xed part of the.I

12. .In atypewriting machine, the combia nationv of a shiftablejtype bar segment, ai. series -of'type bars carried thereby, two` series 'of intermediate sub-levers -ofthe third.'- order whichvary ineffective length and?v project., in opposite directions from their"A fulcrums,.one series ofsaid sub-levers being F'shiftable with the type bar Segment andthe other series bein `fulcrumedon a fixed portion ofthe mac ine, the sub-levers'of'the two vseries being normally'substantially par-f allel throughout .at least a.portion 'of their length and moving into converging lines when actuated, and a series of links connecting said sub-levers and affording a relative.

shifting movement between the two series of sub-levers when-the' segment is shifted. 13. In a front-strike typewriting machine,

the combination of a shiftable type bar seg,-

ment, a 4series of upwardly andrearward striking type bars carried thereby' two -selries of .upright intermediate -subevers of the third .order which; var in effective length `and project in opp site'` directions..

from their fulcrums, oneseri'es of said sublevers being shiftable with the type'har seg-v4 ment and theother series bein fulcrumed stantially parallel throughout at least. a portion of their length and .moving into converging lines when actuated, and a'series of links .connecting said sub-levers andaffording a relative shifting movement between the two series of sub-levers when the segment is' shifted, said links being at varytype bars carried by said segment and shiftable therewith, a series of upright. sub-levers of the lthird order varying in. llength and loperatively connected with saidv ingI distances from the fulcrums of the -two `series of sub-levers'. l

14. In a typewriting machine, the combiseries of type :bars carried thereby, a series o f key evers, a series of sublevers shiftable with said segment and operatively connected with-the type bars, a second series of sub- :levers controlled by said keyi levers, and `links connecting said sub-levers to aliord a relative shifting movement between them when the type bar segment is shifted, the positions of the links relatively tothe fulcrums of said sub-levers varying from thev center tothe sides of the system, each link bein brought nearer to the fulcrnm of Vone 'sube ever as it is situated farther from the fulcrum ofl its associated sub-lever.

connected with said ty e bars, a portio-nfat,

`mention'edseries o f su -levers,'andla'series connecting said sub-leversl to a rd'a relatlve shlfting movement-between them .when

being at progressively greater heights "from` the center'to the sides of the system.

16. In a frontstrike typewriting machine,

the combination of a shiftable'type bar segment, a: series of type 'bars carried thereby, aseries of key levers, a series of` sub-levers shiftable with said y segment `and* operatively connected .with said .type bars, a por-- tion at least of each4 of said sub-levers ex- `tending in an upright-direction, a second series of upright sub-levers controlled by said key levers and normally substantially vpa'rallel withthe uprightportions of said first mentioned series of sub-levers, the'sub-V levers of the two series extending in opposite directions. from their fulcrums, and a series of substantially horizontally disposed links for connecting said sub-levers and to afford a relative shifting movement between center tothe sides .of the system.

17. In'a series of type vbars carried.thereby,'a series shifta le'with said segment and operatively of sub-levers controlled by said angular key levers, andy a series of links connecting said 15. In a front-strike typewriting machine, i

shiftable with .said segment andloperat'ively yof substantially.horizontally 'difsfposed links typewriting machine, the icombination ofa shiftable'type barsegment, aI

of an ular key levers, a .series of sub-levers 125 connected with said type bars, a second series nation of a shiftable type bar segment,a

Vleastjof each of said suv -levers extending 'infv an upright direction,aseco'ndseries ofup.190 right sub-levers normally substantially parallel with the upright. ortions of said first thetype bar segment is shifted, said linksl i `them when thetype bar segment is shifted, `said links being at progressively greater heightsfrom the on a iXedportion of the machine, thesublevers of the two lseries being normally subthe combination of a series of upwardly and op are operatively connected with said first `mentioned sub-levers at varying distances 'the combination of a shiftable' type bar segvatiops from sub-levers to aiiord a relative shifting movement between them when the type bar. seg nient is shifted, said links extending at varying distances from the fulcrums of 4both series of said sub-levers. i

l 18. ln a front-strike typewriting machine,

nient, a lseries of type bars carried thereby, a series of angular key levers7 a series of upright sub-levers shiftable with said segment and operatively connected with said type bars, a second series of upright sub-levers connected directly with said key levers, and substantially horizontally disposed links connecting said sub-levers to vaord a rela tive shifting movement between them when the type bar segment is shifted, said links being situated at progressively l.higher elethe center to the sides of the system. 19. ln a front-strike typewriting machine rearwardly striking type bars, a shiftable type bar segment on which `said type bars aremounted, a series Aof upwardly extending carried by said sli-iftable type bar segment, a second series -of sub-levers which extend downwardly from their fulcrums and which from the ulcrums thereof and operatively connected tothe key levers at a uniform distance from the ulcrum ofthe key levers,

and links connecting saidsub-levers for l aording a relative shifting movement between the two series of sub-levers when the type bar segment is shifted.

20. In aront-strike ty ewriting machine, the combination of ashi table type lbar se ment, a series of upwardly and rearward y striking type bars carried thereby, `a series of angular-.key levers, a series of upright sub-levers of vthe'third order pivoted on and `shiftahle with said segment and operatively connected with saidy type bar, a second series of sub-levers pivoted on a 'xed portion of the machine and extendin from their fulcrums in an opposite direction from the .lrst' mentioned series of sub-levers, direct pin and slot-*connections betweenv bthe angular key leversl and the last mentioned series of sub' l i levers, and a series of links connecting said series of sub-levers -so that each link connects al sub-lever of one series with a correspond# in sub-lever of the other series, said links a Ording a relative'movement between the Y sub-levers when the type bar 4'segment is 'shift/ed, said links extendin lat varying 'disf tances from the lulcrumsv o said sub-levers,4

the links extending farther from the fulcrums of the first mentioned series of sublevers and nearer to the fulcrums of the second mentioned series of sub-levers as the sides of the machine are a preached.

Signed at Washin ton, istrict of Colume bia, this 28th day o June A. D. 1909.

JOHN fr. soHAAF'F.I

lWitnesses E. H. PARKINS, H. P. LONGLEY.

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