US1651740A - Typewriting machine - Google Patents

Description

Dec. 6, 1927.

B. C. STICKNEY TYPEWRITING MACHINE Sheets-Sheet l Filed 001;. 30, 1922 7 Sheets-Sheet 2 Dec. 6, 1927.

B. C. STICKNEY TYPEWRITING MACHINE Filed Oct. 30. 1922 AIN" Dec. 6, 1927.

B. C. STICKNEY TYPEWRITING MACHINE Filed Oct. 50. 1922 '7 Sheets-Sheet 3 Dec. 6, 1927.

B. C. STICKNEY TYPEWRITING MACHINE Filed oct. so, 1922 7 Sheets-Sheet 4 /m/en for' M6@ Dec. 6, 1927.

B. C. STICKNEY 'fYPEwRlTING MACHINE Filed oct. zo, 1922 7 sheets-:ahem s .r. M W /w De; s, 1927.

B. C. STICKNEY TYPEWRI'I'ING MACHINE Filed Oct. 30. 1922 '7 Sheets-Shet Y VQ WS Patented Dec. 6, 3927.

UNITED STATES PATENT OF'Fy BURNHAM C. STICKNEY. OF RUTHISRFORI), NEW JERSEY: ASSIGNOR T U'NlDER-W' TYPEWRITEH COMPANY, OF NEW YORK, N. Yi, A COR-PGRATION GF DELAWAR'E,

TYPEVVRITING MACHINE.

Application filed October 30, 1922.

This invention relates tn trulli-strik@ typebur typewriting niachinis f thut hns known :is double nmcliiius. living proriilml with two inilepnnilontly in' #vini-utili' uuihlc sit-tn nf types,

0119 of thu svrnrul ohja-cts (if thvv invention iS im* inmlniiing :i (innlih, typvnriting nizn'hinn 1,15, inuhing miliv blight, alterations or whangvs in al usual :linglwhift trunt- Tomi standard thvpewrivnf nun-hina upon which the present invention :1n iinprnvemvnt. Another Object nl' the inrvntiun is t0 prmlnfre :i (loulile tyi'mwriting nunhinv, having nie-uns for hringini.r hun uw Oit'her of tno Seti-1 of types. to the exclusion of tho othir nel. tognthnr with n funs for cuff shifting: hmxrw-n lmrnr-vasf nml iipiivr-czise Charactrfrn nf ninth fuit, whirl iff ilnliln in Cnnstrivtimi, @lily-"ive in uinfrzitinn :nul inexpfn 'n tu inunntintniv, :intl more purtcnlzxriy :il ,ng lin gvnrul linea nl, :unl Mnhoilying the advantages oi', tlux iw il lindvr" wond stzinihnd tyimvriting ninchinn.

.ln nnte hiru., the iu'csint invention mlnpl'iws; :i ilmilihf infnhiiu having?, :i Set of rnnt-frihe typo-hars, in which auch typoliai' g'ilm'iilfil with lim wts fit' types r0- lntvil. nuiii nel' ntA typos, comprising; lowerc-zw in' srnall'ntrvr types :unl upper-#fuse 0r rfiipitni-h'ftmtjfikw. ninns'" living prorithtl for utlnit'iwlr hringing into uw eithtr one m the nlufi nl' iii@ type-sots; whili-y the nthm' nan, nvr-l. uml rnvnn, living pru- `ziwfynling linnn i=\,"'x'i 'f:i,-1i\ t0 .n iur vshiciun'ui thf- K xiiuwtf inn); lin in uw. So'nn of the man tvutnrvs ni' th@ nwntion Inu), lmnwr. hv uwil lor either gnufpnsoh, u@ the invt'nticin in not linxH itnfl tn iinlvpenileut nml ziii-tinct sots 0r lfulmini (if mp9s.

:mil in thifiwnH-:iw types nl' thix nther @et QW. mmm lining prmnlwl for can@ esiiing ilu? pinten hetwnen hinwfr-inife and Serial No. 597,756.

iippm-cnsc characters corrfrspnnliinff "ff i setting of thv pluten for mi i m' the ithur 0l' the Sets of t8' typts. :lull @mkh ,wi-t furnpi; finies nih us npiim und inw In the tint normal ponitiiin nt th@ pluenvlmine is liftfil :intl against :i Ship hy innunfs uz" i iilzii ing' hiring, to hohl the pluim in typingT with the @wond typn in hf .if from theV` luntmu, whi i milj; hf' fl van() L viv in -tlu x hmm si, :it

stop. S0 thnt in this lowmwi uam-5h tuin of the platen it, will liu: in n Vinit..k

typing h v mmm` it the tiret 'nii-f serios, whii'h will lie the ummm-:1w Chun tOi' nl th@ lmvur svt nf types., unil Flinn i, shift-key in rcxlwwl, they 'ilntrsu-'rnu ha returnml by thi ,nlzitfnlil'tin;f m; g rie'tm'ing' spring npwfiwlly. :intl i@ in ln' thv stop zigainrt which it prv-i hf^l l by the pringp ,jrping nrw with they two tjfm nt" tine inrwhy merely opvrnting ih@ iii-iv, Shitt-lwy in the nsnfil way.

In ordir tu typ@ hy nieuw-1 nf tl the upper set. of uhii'h the {hieif-fi series from thv holtmn i@ ilu lonvrws :incl the fourth tjriw, tlm upm setting derive or cnnw'rtlei' im emplqvml.' The cnnwrier ulmlr n Singin hznnllv nr ii nhl@ in (inv flirevtinn m the nihv? two limiting pnsitiiins. Th@ com iff unisni also include@ nwnns tm' nl winnmgtinn of ihn plutth--rosmri that it will not liftithe platen nii i which finally changes; they mnnfn't z f l)laten-lvstoringg spring; which it will slightly :i ing the platen downwmw mechanism also Ine-'ine` for repositioning or moving the pieten ulriwardiy from its.y tiret normal position to the -icond nornial poSition, correapondinj.:r to tho-third type in thc aerien, which will he the lower-case type t" the upper typeaset, the platen heiujgy held 1:it itssecond inumal poaition against suitable stop-5 hy gravity and hy the slight down ward ptdi nl' mid plateirreattiring :-pring. The converter mechanism al1-o inclut/len4 mean?- for changing;l the connection oi the single shift-hey. so that. when the shift-key operated, with the platcnt set lor typing)r ln' means, of the lowerrzwe type J of the nec @iid set ol Dpef, the platen-trame will he raieed from it,l eccomi normal position ol' rest to a linal or uppermostr caw-shift position, for typing hy means ot the uppermost or upper-ease typen` of the upper type-set, and, upon the rele-we ot' the shift-key, will drop hack again to its ici-ond normal position tor typing.; hy mcair nl' the. lower-case type; et 'the upper typesel. 'lfhe said converter mechanism also include@l means for moving, at tiie proper time, a pair ol' etopcarrying slides, each ot which carriesA a plureality ot moiahle .stops cnuagcatile by Shoah den; prmidcd on the plateufi'rame, in order, in wnnhiirition with tixctl stopeato yatop and hold the platen aty any one ot im fout diter tnty pewtions. Alter the shitting or :Betting 01". the converter mechanism, typing may take place in the nbuai way, .Ly menne4 of the ugual type-keys and hy the use of the same nhil'nlicy that wlw used hel'ore. Merely by moving the single linger-piece ot' the converter mechanism in the other direction throughout the extent ot' its movement, the machine will lie react tor typingr as helorc, oy means of the lowerwa'se and upper-cane types ot' the lower type-ect..

'the invention also include l improvements ratinp; mechanisni, and in in the rilfhon-v.l mean: provided o that the extended fourtype @ptr-liars will cica r tht; l'ront rail, upon wl'uin the carriage travels, and its aastciattd palta.

Other .teatureer and advantages will here inatter appear.

ln the accompanying drawings.

rute l e aulatantially central(- front :u tei-tical :retina oi' a t-\,pe\\ritin ;r nur 'itguyinlgf the present iui'ention, willi arril other parts olf the machine in heir normal nositions for typing with the second type from the l-.ottom in the series ol' four types on eaclnty'pe-bar, thia` type heing!l a ,loner caec type oll the lower et oll tj. pc, on eat-h type-liar.

` ltie L' in a detail front to rear vertical neme-.iai ricw. :allowingr the escapement mechanimt and rihbonwillrator.

Figure 3 is a iront elevation ot' the inacluae. partly in section, and with parts emitted.

Figure 4 is a similar plan view of the machine.

Figure 5 is a view similar to Figure l. showin;r the platen case-shifted downwardly through one case-hilt space, then-hy to lirinlgr into tee the first or lowermod type. which is the upperHzue type ot' the lower wt ol' types. the platen lit-ingry automatically :springaelurned upwardly t0 its normal po- .anion l'or typingr hy means of the second or lowcicaee type ot' the :feries when the Sl1iftlever i released, as shown in Figure 1.

Figure t3 ia a detail front View showinf the part olI the converter mechanism whieli are connected to the shift-rail fraaie, in order to enable typing;r to he done by the third and l'ourth typee, which belong to the Second set' ol1 types, as shown in Figures 8 and 9.

Figure T is a horizontal sectional detail Of the actuating' device ot the converter mechanism.

Figure 5S is a view similar to Figure l, but showing the converter mechanism aa operated7 to repoaition the yettable platen to a A1c-ond normal position for typing by means ot the third type in the series, which is the lower--ciee type of the second series of types.

Fie-ure ll ia a View similar to Figure 8, in w hich the platen has heen case-shifted upwardly through one ase-shift space or distance. so as to type hy means otl the fourth type in the series, which is the upper-Case t; pe of the second or upper set ol' types, the platen automatically returningt downwardly to its second normal position l'or'typing with the third or lower-case type in the upper set of types, as shown in Figure 8, when the Caseshitt key is released.

Figui-ebA 1t), 1l. lf2 and 13 are side eleva-v tions showing Successive slagen or positions ot the various parts in converting the Inachine from the condition ihownin Figure l to tiat shown in Figure 8.

The typewriting machine einhodying' thel present invention shown in the drawings is Lgenerally ot the comtruction and similar in operation to the standard Underwood single- .Chil't typewriting machine. The n'incipal feature of the present invention resides in the employment 0lA a setting device or converter mechanism, to he hereinat'ter described, for traird'orming or converting the machine from a si11gleliitt machine tor ueinpr one set oll types to a sinele-shil't machine for nainer a second set ol' type .\ll of the tout' type l` il and 4 arc arranged in a row or eel-ies ltmgitiulinally along an extended type head or block 5. The type` l and i. belong' to the first or inner set \of type. ol' which the type 2 is the lower-case or smallletter type, and l is the upper-cane or capitalv letter type; while the types 2l and 4 belong to the second or outer set of types, the type 3 being the lower-case or small-letter type,

llll) Lamy@ and the typ@ 4 being the upper-case or capi-f Ulfletler type, (')nly of these sels (iff l'peg usable at :i time, dependent upon la e position of the platen 6, as fleermned by Innung 0f said Ponvorter nwclmnim, as will hereinafter appear.

The typefactm 0f th@ mnliiun shown in the drawings; is subfantinlly the sume an that nl llie standard Unflnz'wfmd Singlf shift lypewriing machine. Euch type head 0r block 5 ig carried Upon flan fr0@ 3nd Oli an nynvmfllj and rearwardly fuvinglug typelizfar 7. Llifi'e being about as many type-bars T in lli@ set uw commonly employed in the lnmlaiffl Underwnml or other @ingleshift ljf'iiiewriting maffl'sine. The typl f1i' T :sluiuimlml. rwlow 'lw printing' point. ugzwn :in summit@ fzlwrnnlwlm :xml :1i-f gniilecl in wml radial guide-Skils 9 formell in ai Sub stannilly nsnml typc-bar segment lil. which carrier; lh@ fulcrumwvirn l. The {wpa-bar sPgn'ient 10 is nxrungef'l vorticnllv anal i@ si tiiomrily supporl'vd at. its tup upon :l usual vmssmr 1], Secured :1t it@ @mls to the main imm@ .l2 of fhg machine. Typcnlwvs lf3 am carried on the fmward vncls nl luv-levers M, 'pii'inml :it their reni Nuls upon :x owns-rml 'l5 in the main frame l2, @zn-lr nf slid typs its til)

Frame rod 33 and further 'supported by a .second transverse platen-frame rod 45, a usual bent lguitie-member 46 being carried by the bracket 44 to engage beneath the shift-rail 42 to assist in maintaining the roller 43 thereon, and also to enable the shift-rail 42 to exert a downward pull upon the platen-frame 25.,

First there u ill be described the means involved in the operation of typing by means of the first or inner set of types 2 and 1, as shown in Figures l and fi: next the means involved and the operation thereof for typing with the second or outer set of types 3 and 4. as shown in Figures tt and 9; and then there will be described the means involved, including the converter mechanism, for transforming tbe machine from the condition thereof shown in Figure 1 to that shown in Figure t5, successive intermediate positions of the movable parts between Figures l and 8 being consecutively shown in Fieures 10,' 11, 12 and 13. It, should be observed, however. that this outline of the following description cannot be strictly adhered to, b v reason of the interengaging and interacting' relation ot the different parts ot" the machine. Finally, the remaining parts or feature-,sof the machine involved in the present invention will be described.

The platen l is held at its lirst normal position. as `sliown in Figure l. for typing, without case-shitting, by means of the smallletter or lower .set ot' types 2 of the first or lower set ot types, by means` now to be described, for yieldingly pressing the platenframe 25 upwardly to cause a shoulder 47, one upon et vlh end olf the platen-trame 25, to abut against the lower side of a sto) 48 carried by a stop-carrying slide 4f). w ich forms a part ol the converter mechanisln, there beine a similar ,eUni-carryin;r slide 4S) at cach side ot the machine. Near one side of the nun-bine, shown as the left, a shifttrame-operating' arm or lever 50 is rigidly, but adjustably, mounted upon the shiftl'iame roch-shalt l() b v means of a clamp Jil held by screws T2. to clamp the lever 50 upon the hub ot' the adjacent end plate -ll ol the -hil't-rail frame. The oprratine lever fill. iiliich is ioclaable as a unit with and Vl'orms a part ol' the shift-rail traine, extends generallyy downwardly and torwardlv, and, at its lower end` is liil'urcalcd to torni a real' prong Jill and a Al'ront prong il. sub- -i iniiallv t'riainyular #priiig-positioning or r iriuwusettin;A ilate 55. forming a iart ol" l M t said converter mechanism, i:`v pivotciil ncar itkv center by means' ot' a screw 5G to the lower cud ol' the rear prong or arm 5S ot the shi l't-frame-operating leve lill. A platenrestorin spring :'7 is anchored to the ad; jacent idc ol' the main frame 12 by means4 of 'an inwar lly-projccting stud 58, and extends at an inclination rearwardly and upwardly, and has an upper straight portion 5S) passingV below and to the rear of the pivot-screw 56 and pivotally connected at- (it) to the rear and upper corner portion of the triangular plate 55, so as to have a ten`r denckv, in the position of the parts shown in Figure 1. to rock the triangular plate upon its` fulerum-pivot titi in a clockwise direction; but, as shown in Figure 1, the triangular plate is locked again-t such rocking movementv by reason of a pin or stud G1 carried by the forward corner of the plate having a locking engagement in an inclined or non-radial slightly-curved slot (32 provided near the rear edge of a substantiall Sector-shaped platen-shifting,r plate 63, which also forms a part of said converter mechanism, the plate (i3 being pirated by means ol' a screw (34 to the forward prong; or arm .ri-l of the operating lever 5t). The platenreftoring spring 57, acting through the slotengaging pia (l1 carried by the plate 55, has a tendency to rock or rotate the sectorsliaped plate ('i in a counter-clockwise direction on itsl fulcruni-pivot 34. Such rotation is prevented by means of pin or stud (l5 carried by the operating lever 50, projectinel into an arcuate slot G6 in the upper part oi' the plate 63, so that, when the rear end of said slot (Sti abrite against the pin 65, shown in Figure l, both of the plates 55 and G3 will be locked against rotative movement on their respective fulcruin-pivots 56 and (S-l, so that thereby the platen-restoring spring 57, which, in the condition of the machine shown in Figures 1 and 5 is a platen-lifting spring, will have a tendency to rock the shitt-frame-operating lever 5() together with the plates 55 and G3 as a unit, in a clockwise direction to lift the platen-A frame and hold the stop-shoulders 47 thereon against the stops? 48.

ln order to bring into use the upper-ease or capital-letter types 1, of the lirst or inner set ot types, a temporary case-shift-key (37 is depressed, as shown in Figure 5. The case-shift-lever (58 tor the shift-key G7 is pivoted at 15,y and forward of its pivot is provided with an upstaudingr shift-frameoperating arm 69. the upper end of which is pivotally connected at '70 to the lower end of an inclined link 7l. which at its upper end is pivotally connected aty 72 to a lug 7? formingr a part ol the sector-shaped plate f atthe top thereof, it beiner noted in Figari i that a straight line passing through the pivot-points and 72 ot the link 71 passes to the front ol the pivot-point 64 of the g late (S3, and also to the front of the shift rail frame rock-shaft 40.

lhen the shift-key 67 is depressed, the downward and forward pull of the link 71 will retain the rear end of thearcuate slot (iti in the sector-shaped plate 63 in enga ement with the pin oretud 65, carried by t e --lot G2 in lli@ iii-mom mili a il:

li 'iwioiw l :mil will will of llie ziri'iizile lol iifiimefl pluie Sil iii iiiwigeinent willi moiifiaieimlimitingf @in ($5.

fl Wil1 new le elem' llizit, when ille shilllfey il is lepre Seil. fis shown in Figure 5,

liu s'wlnr-si:ipel pinten-Shilling" plateI (53, llie triangular ipring-lg-ositioning or springA s liga lever Si) will all more logellier :is ii if lf' `l: lie sein'ftwrnilfinine rorrli'sliiilt fill? ir imlf'reli'icliwifw clireelion agnirptt 'fixe li on ol iie platen-'lifling rpring 5T. at ilie linie time lowering; the shift'- xnil 42 to @bill lie platen (i downwardly lirongli one ifiisw-fliifl space or distance? for lli-inging :nio 115e tlm eippe1-efise or enpiiiildeter types l of ille iift or inner set of types, as shown in Figure l, the downward ense-Sliifl 1noveil@ ment el tlm platen lining limiieil by menne ol' ilowniirnecl :lionl(ler-'forming portions Tl on lli@ ends of' lh@ pliitenrnnie i5. Wliieln :iliiii iagiiinni llie upper sides of tlm @nil lis s il? il lli@ eiirriiigje 30, their Cerri-rige onus 3 forming lix'efl Stops.

llllisin the elnlbkey 6T released, lie lalen-rmtoring or plnlenlifling spring 57, the intermediary of the ,=:liiltr:iil :il other paris liereinbel'ore fle lift llieplnte1'ifrii,nm 25 to reN l nml-loin andj al' llie saine linie, will renee the shift-key lever GS lol resiore lie Shift-key 67 io normal position. :if: Siiown in Figure 1, the '5f slii-`tkey operalefl lever 50 und lli@ con rer?riiieflmnism plates 55 :ind C?. all rockA 0i togeiiier :lo o. unit to ruine tlie shift-rail Yln 'ille so ond or upper normal pmiilion of Molen (l, shown in Figure S, fer typing.

.it raie-l lling', lr* ineen@ olf llw Small virer or li'iwer-izsa types 3 of tlie seeoni'l or miler gf nl' l ilie ,Conil or iippvr niieiivlinine slop heul-ler 74 reets upon fx enfoui m' upper slop T5 fiiiriml ln' tlm for wird will of lli@ slop-iwiiiyingf slide 49. wliieli luis linnn shifted lijf lli@ conrei-terineelinniqin to bring the upper pliilenfrarne-slop 75 into une* While it the same time the lower pluli'rr {mine-nop 4S limi been Withdrawn out o ille grilli of lli@ first stop-Shoulder 47 on ilxe inl :il ille planen-lilium ln lle er orteil condition of the niiieliine, 'ia-vii fn Figure 8, the eonrerter mechanism lofi-ans nl ille sliiftuvl frame, has lifted lie pluterrfmrne Q lo eriaililw :lio appar or nim'zilile }\lfxi'i\iifi:ii1ie ;top Tix o lli; niorwl into position to lie engiiggwl lig' ille npr ,op--blioiilflf-r T-l or tlw pinliivl'mixne. A .i the eonverlrr nir-eliminen luis been elleuiive ro ruck lli-v tri;iiij,5iil:i:' lining-yuminning; pluie 5:3 in :i counteri-locke: I ilireit ion upon it?,l pivol :'i. linimniifli fifi, :is liereinlie'fore described, tlie hill-ruil fizinle :nul tlie operiiiing arm 5U roel; together :is: :i unit, the eloekwige rodiiig ol' tl'ie operating arm Si), combined willi Ilie elouliwis'e rocking el' ille triangular sprlng-po itioning pluie thereon, liiis changed, :nul has moved foiwii'illy, tlie pivolnl eonnoriing poimof ille plaleniesloiiiig spring 5T, so that now this spring exert@ a loiiniviiril pull along-1 u line pausing to the front of ille pluie-pivot; 5G, :incl also passing to the front of the axis, of ille sliilmiiil-fiaiiie roelvsliuf U, inlezid of to ille rear of Lliese pi\'ol.-1; oiiil-z, shown in Figure l, so tliii in rml fondition of llie machine, iis shown in Figure 8, the plnten-resioring; spring 5T lms @onheil io ne u pl:ien-lifting spring, iinil inleail exeriir ri sliglil downward pull Upogri the sliiflrnil 42, thereby :is isting grinfie holding ille npxer pliitcirlrnnie stop-elimini Til lirnilv ilown upon lie upper movable )p "I5, 9,5 clear rozn Figure The elnintereloekwise rotative nim'emeiit of llie triangular eprinw felling or spring-gwninning plaie iii up n ile pivot IBG lans been effective. ilirm fili ille engagement oi' llie pin or Smil lil .in the inelined Slot (i2 of llie sei," `sliiiixiefil platensliiltingr plate iii-` to rock this litter in :i Clockn direction upon its: fuleruni-pivot 'The Colinlercloelwise rocking;` nioi'einen of the irizingiiliir pluie iis limite@L by reason of llie plxitxrpiii (il rezii'fliiiigf lli@ enter emi oi'tlie slot 62 in lie plate Mil, :unl ille rloclnrirsn roc-king movement of lli@ liilfi fi limit/eil lil" llie pin (Si in Elio slot liti :xml alle. furl more or I tively, by the engr einem i i. (l of lie ireimie lol Cl ie pluie wiih the Sloop-in o5 fisi'iieyl li); ille ogwriiiing lever 50, :is Clearly Shown in Figure Y.

By reaxon of tlm loclnlil eeniliion ol' ilu.- plfites izinfl GIL juist described, the spring 57 will :iet upon liee platos :mil lli@ oper- :lingr zum 50 is :i unil. The onnerrlnifk 'wire roeliingl of the s 3ifloi-slinml pluim-- Shifting pluie Gil linie been r-ll'eeiiw lo ,swing the upper pivotal eomieelifn of the :Qliiliffkeyopernted linlr 'Tl renrwfir/lly final flown wiirilly, so that a srnisrlit lini joining lie two pivo-poinis sind 7i? ol lie link Tl passes below 1lhe fiileiuri"i-}^ i\'o lliY ol' lie plzile (i3, :xml nl@ below the axis of tlw loll rail-fzime rock-Shaft, fill, :is slmwn in Fig# nre 8. insleziil of nl', flie front lliereo'l. sliown in Figure 1. i i

lli orrlif lo bring intr we infr upper-Carle or Capifiil-lelter types l of lie sefmml or outer .ser of types, the single irinpeiiiry llS Sil

he ohitrnii'eStoring epring 5l', `while fr #inanimate F57 here therein au outer lair eloeerl culo-:fil lo operative to set l* len from either one to the other of l,wr-ilelrilierl normal poeilionv," and iin meer irregular rloeerl emn-sli 9i lhe stop-Corryingf slide all?. While the Tonnerre ilevifo :is shown in the llrlmw ing vonigirieing two miinplztes one ofr which i provided with n. single Camelot and the other of which ie; provided with two canifilotel here heen adopted to curry out the inrention. it i@ rohe understood that the ninnher ol' mnrplates und the disposition of the cuni-sims muy he varied, For example, all oi the tulo an ouhl he provided in u Single coin-plana or .l separate (funi-plaie could he prox irlml for eli-h ot the Coin-slote.

A rearwardly :ii slightly downwardly e.\:- tenflinf; operating har or linh if: hifureated .fit it@ iorwziril end to l'orni prongs 93 liy n the link S52 guided upon the huh of mobiliare Sli, und at its iorii'aril end `the iii-'lh 92 pivotolly Connected :it Qf-l to the lower vox-lier of the triangular Spriiigqiio'i Honing plate o. 'ThiJ link 92 has a ouin-stud 95 projl 'ing into the cani-slot S9 of the cani` plate oo, whereby the link will he operA liteil in ai manner hereinafter to he ilesrrihed for rocking the 5pring-positioning plate 55 together with the intereonneeted ehilt-levei7M platen-Shifting plate G3,

initially rearwardly-effitending op.- r or link 96 at its rem' und is piv- H omleeieii zit 97 to the mljmrenl shiftY :rome ille-pluie fil below the Shil'triiih vcr/mir; operating; har or link l0() hil'uro: :ii mwr end to 'forni prongs lol lo.' nimh ir is guided for Substantially veril movement upon the huh of `the plate ziiljurenl', to the coin-plate S7, i @pilar-eroi of the link lo() living pivotiliy wmieiatell gli mi to the lorwnifl end ol u foi wlixlij, f illy downwardly extending :frm j liefl upon :i tzzmeverse rock-shaft lill jmirmiied :it ite ernia` in poets lili) on the :min iiziiiienorl; 1Q ot' the u'iaehine. Sul)u riluiitizilly iiiilloliy lwlween itiy enils the rork- #haft lill marries :in upwardly und reoruardly extending operating' arm 10G having* lt iin tree rml :fi hook l0? formino there- "fz'fli :io open Slo?, 1108, Whilfh reeeiv or en fee troneverselyeenrling horizontal w or huil roti lii. which at its end curh5 Smell hail arme; forming rocking platee lill journsiled :it lll upon the forworll ende olf the plates 74' on the respeetire corran-e onlie the rofl 1G53 sliding longi tmlihzilly in the slot S in the traveling movement of the carriage 3Q. An open Slot llz, provided in the upper edge ot each of the rocking; platee or bail firms llt), engages n eind lili projecting inwardlyv from the forward end of the adjacent stoi-mrryingg slirle 49 for importing stopeetting Sliding; inovenient to the latter by means of a com stud 114 projecting from the link l0() into the inner earn-Slot 91 of the earn-plate S7, whereby the etopearrying slide 49 will he moved or shifted to set the movable stops 48 and in a manner hereinafter to be desseriherl.

Although the platen-shift lever or lingerpi-flge Sil muy haven eoniinurms forward movement in transforming the machine from the condition Shown in Figure l to the condition shown in Figure 8j and also muy have ov continuons reverse or backward movement in tronetorining the machine from he condition ehem; in Figure 8 to that shown in Figure l., it is believed that the construction und operation will he best understood hy referring to the successive intermediate Stages ot' operation which are consecutively illustratecl in Figures l0 to 13, inclusive, and which occur in transforming the machine l'roni the eomlition thereof shown in Figure l to the Condition thereof shown in Fir@ ore 8, Afor typing `With a single casefshift hy ineens of the outer or upper set of typee 3 and Al. lt is to he tirs/L noted, referring more pzxrtieuliirly to Figures l. and 5, that the Coin-- Slot SS) in the cani-plato 86 and the outer eame'loi 90 in the esin'rplate 8T each has, :it what muy he termed it;y initial or 'forwfird end, :l short ont-turned rziliul portion 115 and llo, respectively, to provide for o Slight forward movement of the reepective erunstiiils 95 sind 99, carried by the reepeetive linie: 92 and Qt when the platen is ease` shifted llownimrilly, ae shown in Figure 5. Also, the radial slot portions 115 :ind ll will loe/k the cunrplaites 8o and Si', to prevent eetting.;r movement of the converter 1neehanism in the ease-Shifteol position olf the platen shown in Figure .ln the phare@ of operation shown in Figure l0, the linger-piece S3 has been moved for wird sixtheientljs to (renee an outwardly-in @lined portion 117 of the irregular Camelot Sil in the earn-plaie 8G lo push the Czim-stud H5 radially forward, whereby the operating link U2 rlgfflis: the springeetting or spring# poqirioning plate in a eountereloekwise lirertion urmnfite fulerunl pivot 56 to zi sumrient extent io bringY the pivotal connefring point (it) ol the platen-restoring springr`57 :ihn :t in u line with the axis of the shiftw rullraine rorlr-ehat 4G nml the llxeol point of Connection 58 of the pletenwertoriiig lll@ whereby the lifting effect of the iinten-restoring; spring 57 upon the platen l enhfizintinlly neutralized or modified, in order to pr irle for the @any withdrawal ot the :nm .frhh i-tops as llmwn in Figure 11. Alec. :linnn in Figure 10, the coun- (errlfrv-kwie r-f :liing ot the spring-positioning;- plinilhs brought the line of pull of the spring trom the reni to the front side ot' itplv point 5V, so that thc Springh 57 now han' :L einlenvy to impart further eonntr-iylovlimee rotation to the plate 55. The

connerrlnel Se rocking ot the plate 55,

thro-argh the yf1rigunreinent of its pin G1 in the `1= inclined Slot GQ in the ShiftJever-Connected plat n'shiftin'g plate (53. has rocked the hitter in a clockwise direction throughout the greater extent of its; movement, for changing the mee-shili vernam-tion oi the link 71,

fill which is here shown as incomplete7 but will he re l`-rrenl to further on.

During the melting of the pring-positioning pnte 515 from the yo-ition vhonn in Fig:- nre 1 to that shown in Figure 10. as above 33 ileeeriheih the entire f-hit't-rziil l'rnnie, to-

gether mi he hiturrntml pinte-tznrrjxingg flicking; move lont :n: e. mit hv ree-on of the cam-stmt Jil of the Siiilfi--rzt'zl''r line-ronireti'l etl link eine engfigfrll zn in-l hohl l-:rninL-t xnorfnent hy n, ereiinil'enrntical or min-enrif: g o1 inn E18 of the entr-1' cani elet, 91) in :he lin; plne 8i', thereby preventing the platen frame 55 from dropping down, lill-1efl wiz-'e` the ntnp-finrjyinej .-li le lil hw; heen helal f, i.fiti':nnry at the 'p -`tion f hewn in Figure 1 hy reaifen of n Circnn'ilerenthil portion. 119 of the inner caznslot .l of the min-plate Si' engaging; the nin-stud lll ntf the Stop lll ting link' 100,

ln 'Figure l1. showing' the next illnictrnterl w ll ph e otl tipe-ration, the linger-pieve h3 moved forward the shi'i-rni l'rznnn nml its nperatinfr firm fr() are Still hohl Qtntil y the eonrnned engagement of the clim-@ md 5,19

in the crcnmferential portion ot the mln 4i-'slot 91hr while un upwardly-inrline;l porLion E2G of the inner canrslot 91 iny the carin-plate 87 has lifted the cam-stud .114 to Qhlf the wp-carrying eiirle 4!) forwardly to M inter mediate pw-,itiV-IL therehy vrlulriis,ring;y lower moznfie str1-p 4S from im enger-t nient will the @tononhler 47 on the pinten- 'rine 5. lin ng the '.vi'lhlrnnuel of flic .lztliio Stff'p the Spring por" inning: H' the. sl'nt-lmy-er nrolling nml niet.: J here heen helel against rrrlting mowhmrr on their resine tive tnlernni pivot-f if? nn" 31 in the pt ztionn -hown in lmh Figures 1() and 1 1, ll): reason ot the n ngenient of n eircnmforvntiil or conventi-:c portion 121 of the earn-Slot 89 in the ennrplnto 5343 with the cam-stud (l5 of tinl link ini. uml also hy reason of the Continued engagent-nt of' the cam-stud 99 of the link 9G in the concentric Slot portion 118 of the outer cam-Slot in the ram-plato 87.

In the next illuntrated phase ot' Operation, L:honn in Figure 121 the stop-carrying i-Llirle 49 is held stationary nt its intermediate position hy reason Of :1 short circumferential or concentric portion 122 of tln` inner mini-lot 91 in the c;ti1i-plnte 8T engaging the rum-stud 114 of the topeiettng link '100, Alm, at this phase ot' the operation, while the pluie-Hitting link 92 held against movement h v the vontinued engagement ot the rain-stud 95 in the circumferential or concentric portion 121 ol' the cam-slot 89 in the cani-plete 86. thu Shift-rail frame, together with its operating arm 50, has been rocked u nnit in u clock wise direction by reason of the engagement of the cam-stud 99 on the platen-positioning link 96 with a short inward!y-inclinerl portion 123 of the outer cam-slot 90 in the camphlte 87. The rocking of the shift-rail frame has rai-:ed the shift-rail and has lifted the platen to n position Somewhat higher than. its second normal position, the platen-tranne il. haring heen raised to n prx-.ilion in which the upper plutevrfrznne litopmhonltler 74A is above, although not yet .in :i line with, the. upper movable stop T5 on. the ;-top- ;irrying slide 49. Also,

shown in Figure 12, the clockwise rocking ot the o'ierlzting; lever 50 has moved forwardly the phot-points 5S anal il o the rocking plates 5.5 anti 63, the rear pivotpoint J-l. of the link 9:2 on the plate :it the `-nme time being held snbstantally ein ionau'y. whereby the resetting rocking movement of the .fihitt-key-controlling plate fl upon its fnlerum-'pivot 64 completed, relutively to the shift-ruil frame, the continued travel of the pin til along the slot 6i. lining' brought the forward rml of the :trennte Slot (1G into engageniontv with tho stop-pn il() on the operating arm 50 to prevent Fnrher r'lo ;l:\\'is e rocking of the plate 63. Also` the pivotal Connecting point Q30 of the platenrc loring; eprina 5T hars been :novell forwardly to :1 point slightly forward of n Straight line joining the axis of the ShiIv't-ral-frnme roth-Shaft fl() and the connecting point 58 ol the platen-re-toring epring 5ST on the nfnin 'lee eonntt. locitwiw; melting mownreln o the plate Elin so that the pring il" im gatill suhg-,trlntinlly nenn-al in ir ell'est pon the hiltrriil frame more pnrivnhirly hy ren-,on ot the continuan` engagement ol' the miur-inl 95 of the lint; ft2 in the ronrenlxi@ poztion 1.21 of th:x mini-541m, t5) in :he nn-plaie h31 which hol-f1tthe link flu'. :mil ron'rf'paentlj; ifs pivotal cminrrtion Slt to the plate :ig'ilnf-t movement. lt to lil no' l :hui the ont/2r nml poxtwn o' the une loi j in the hii't'ley-ienrolling pluie of; is now mhz-,tamilaily ronrentrie with the fnlfzrnmphot itl of the Qining-wtting plate 5I), to

Htl

me 12, hut without completirn the provide for the further.movement of the pin 62 of the plate 55 to its final position shown in Figure 8.

In the next illustrated stage of operation of the converter mechanism, shown in Fig- Yure 13, the shift-rail frame and the roc able plates 55 and 63 are all held at the same position shown in Figure 12. by reason ofthe continued engagement of the camstud 95 in the concentric portion 121 of the cam-slot 89 in the cam-plate 86, and by reason of the engagement of the cam-stud 99 of the shift-rail-frame-setting link 96 in another concentric portion 124 of the outer cam-slot 90 in the cam-plate 87. However, as shown in Figure 13, the cam-stud 114 of the stop-setting link 100 has been "raised by a second raised or outwardly-inclined portion 125 of the inner cam-slot 91 in the camplate 87, to lift the link 100 and shift the stop-carrying slide 49 from its intermediate position, shown'in Figures 11 and 12, to its final forward position, thereby to move forward and set .the upper movable stop 75 directly beneath or 1n alignment with the upper stop-shoulder 74 on the platenframe 25.

The final or completed stage of operation of the converter device, followingr that shown in Figure 13, is shown in Figure 8. As the forward movement of the fingerpiece 83 is continued, for continuing the counterclockwise rotative movement of the cam- plates 86 and 87 the cam-stud 95 of the link 92 rides outwardly in a second or final outwardly-inclined ortion 126 of the camslot 89 in the cam-p ate 86 to push forward the link 92` to impart a final counterclockwise rocking movement to the spring-setting plate 55, until such movement is stopped by the engagement of theA pin 61 against the outer end of the curved slotY 62 in the shiftlever-connected plate 63. whereupon. by reason of the locked condition of the plates 55 and 63, as hereinbefoife described. the shift-rail frame is rocked to bring the platen-frame 25 down until its upper stopshoulder 74 rests upon the upper movable stop 75, as shown in Figure 8, the downward movement of the platen-frame being assisted by gravity and by the platen restoring spring 57. the connecting point of which hasI been brought `farther forward. The end or terminus of the final outwardly-inclined slot portion 126 extends outward to a sufficient extent to permit the platen-frame stop-shoulder 74 to rest freely upon 4the upper movable stop 75 without beig'hampered by the cam-stud 95. thi.` final outwardly-inclined portion 126 of theI cam-slot providingr a slight clearance at the -front of the cam-strd 95. as shown in Figure 8. In vieu' of the frct that the substantially horizontal operating link 96 will. in its final stage of operation, have a slightly rearward movement imparted thereto, by reason of its connection at 97 to the shift-rail frame, the outer cam-slot 90 in the cam-plate 87, at the end of its second or inner circumferential portion 124, has a slight outwardly-extendmg portion 127 in order to provide clearance at the front of the cam-stud 99 of the link 96, as appears most clearly in Figure 8, whereby the link 96 will permit the platenframe stop-shoulder 74 to rest freely upon the movable stop 75. In this final phase of operation of the converter device, from the condition shown in Figure 13 to the final condition thereof shown in Figure 8, the cam-stud 114 of the stop-setting link 100 will engage in a filial outer concentric portion 128 of the inner cam-slot 91 in the cam-plate 87, to hold the stop-carrying slide 49 at its forwardly-set position.

When the platen 6 is case-shifted upwardly to the position shown in Figure 9, as here` inbefore described, the operating links 92 and 96 will have a forward movement imparted thereto, and, in order to accommodate this movement, the cam-slot 89 in the camplate 86 has a final inturned radial portion 129, and the outer cam-slot 90 of the camplate 87 has a similar inturned radial portion 130 to permit the free rearwardA movement of the cam- studs 95 and 99, respectively, when the platen is case-shifted upwardly from its second normal position, as shown in Figure 8, to its upper case-shift position, as shown in Figure 9. Also, it is to be noted that the inturnedvradial slot portions 129 and 130 lock the rockable camplates S6 and 87. so as to prevent the resett-ing of the converter mechanism in the caseshift position of the platen shown in Figure 9.

It will now be clear as to how the converter mechanism through the forward movement of the finger-piece 83, has converted the machine from the condition shown in Figures 1 and 5 for typing with a single case-shift by means of the lower or inner set of types 2 r1nd 1, to the condition shown in Figures 8 and 9-for typing with a single case-shift by means of the types 3 and f 4 of the outer set of types.

cam-slots 89. 90 and 91 form double-faced Since the three i cams, it 'is evident that the machine may be I which it is pivotally supported at 135 on -7 the upper ends of rocking arms 136, forming,r

parts of a usual rocking frame, all of which is not shown in the drawings, but which is journaled at 137 upon an upstanding bracket 138. forming part of the general framework 12. as shown in Figure 2. The universal bar 131 and universal-bar frame 133 are returned to their normal forward positions by means of a usual springr 139 (Figure 2). The universal-bar frame 133 has a usual tappet-forming rear transverse bar 140. to engage and push rearwardly and adjusting! screw 141. carried by the upper end of a usual dog-rocker 142. journaled at 143 on the bracket 138. and forming part of a usual cseapement mechanism. The dogrocker 142 carries xed and loose dogs 144 and 145. returnable to their normal positions by a usual spring 146 (Figure 2). The dogs 144 and 145 are engageableI with an escape- *nent-wheel 147, which may have a usual spring-pressed ratchet-connection 148 with a pinion 149, engageable with the usual rack (not shown), carried by the platen-frame 25.

The ribbon-vibrating mechanism, forming a feature of the present invention, will now bc described. A substantially usual ribbonguide 150, at the front of the platen. guides and vibrates a usual ribbon 51. The ribbonguide 15() has a. downwardly-extending stempart 152 provided with small forwardly-projectingguide-lugs 153, by which the ribbonguide is guided for up-and-down ribbonvibrating: movement upon a usual type-guide 154 mounted upon the type-bar segment 10. Below the vefuide-luflfs 153. the ster'n 152 of the ribbon-ruido extends downward in a space provided at the rear of the type-bar segment 10 between the. type-bar segment and its supporting bar 11. At its lower end the stem 152 carries a small pivot-pin 155. which enlgages in a substantially horizontal slot 156 provided in the forward end of a substantially usual bent ribbon-vibrating lever 157, which is pivoted at 153 upon a small bracket 15T). which is fixed upon and extends downwardly and rearwardly from the shift-rail 42. 'The ribbon-vibrating lever 157 is provided with a short upstanding arm 160 forming ay bell-crank therewith. and the upper end of the arm 160 carries a pin 161 to engage in a rhiwnwardly-openingy vertical slot 162 provide-l in a ribbon-vibrating bracket 163. which is firmly but adj ustably secured to the rear or tappet-forming bar 140 of the universal-bar frame 133 by means of a pair of screws 164- passing through slots 165 in the downwardly and rearwardly turned end of the bracket 163.

When the platen 6 is moved upwardly by tbe sluit-rail 42, the fulcrum-pivot 158 of the ribbon-vibrating lever 157 will be moved upwardly substantially to the same extent as the platen,'and the pin 161 on the upper end of the short upstanding arm 160 of the ribbon-vibrating lever will travel upwardly vsubstantially the same manner as in the standard Underwood typewriting machine. The above-noted operation will take place in the condition of the machine shown in Figure 1, in which the platen is at its first normal position, and in which the pin 161 of the ribbon-vibrating lever is engaged in the lower end of the downwardly-opening vertical slot 162 in the operating bracket 163. Also, the same operation will take place in the converted condition of the machine ,shown in Figure 8. in which the platen has been moved upwardly to its second normal position. and in which the pin 161 has correspondingly been moved upwardly in the slot 162 to a. substantially middle position therein. Also. the same operation of raising and vibrating the ribbon-guide 150 will take place when the platen has been case-shifted to its uppermost position. shown in Figure 9. in which the pin 161 has traveled to the top ot' the vertical slot 162 in the ribbon-vibrating bracket, 163. However. when the platen is case-shifted downwardly. as shown in Figure 5 and as hereinbefore described` the pin 161 is permittedA to escape from the lower end of the slot 162. so that thev ribbon-fluide 150 and consequently the ribbon 151 are not moved downwardly with the platen but. are held at theI same position. shown in Figure 1. by means of a sufficiently stitt` stationary arm v166 rigidly secured to the frame-bracket 13S and projecting;r forwardly beneath the ribbon-vibratin; ,1r lever 157 to form a support or rest therefor.

The ribbon-vibrating bracket 163 is cut away at, 167 below and to the rear of the slot 162 to permit the pin 161 upon the short upstanding` arm 160 of the minion-vibratingr lever to move freely rearwardly when the fulcrum-pivot 158 of the ribbon-vibrating lever is lowered by the lowering of the shiftrail 42 when the platen is case-shifted downwardly from the first normal position thereof, shown in Figure 1, to its lower case-shift position hereinbefore described and shown in Figure 5. lVhen a type-key 13 is depressed. the bracket 163 will be moved rearwardly without vibratim'r the ribbon, the eut-away bracket-part 167 beiner then retracted rearwardly away from the pin 161, as will be clear from an inspection of Figure 5. It will now be understood that, when the platen is case-shifted downwardly, the ribbon 151 is not vibrated but is held stationary to cover the printing oint on the platen, both in the normal and depressed posltions of the typekeys 13. so that the printing point on the platen is at all times covered by the ribbon 151 whentyping with the upper-case types 1 of the lower or inner set of tvpes. the construction and operation being thereby simplified. as in the present invention it is ot desired nor considered necessary to uncover the printing point while typing with the uppercase or capital-letter types 1 of the lower or inner set of types, inasmuch as capital letters or other upper-case characters are used comparatively infrequently.

The ribbon 151 is alternately wound upon and fed from a pair of usual ribbon-spools 168 carried upon the upper ends of shafts 169,'journaled -in brackets 170 forming part of the main machine frame 12 at the sides and front thereof. The ribbon-winding mechanism is not shown. but it may be of the usual Underwood or of any suitable construction.

In carrying out the present invention, the substantially usual front rail 39, scale-carrying frame-bar 171 and margin-gage rod 172. together with their adjuncts, are all raised and 4'brought forward as a unit, in order to clear the extended four-type type-bars 7. Also, the rock-shaft 104, forming a part of the stop-setting means. as hereinbefore 4described, is located sutliciently f orxv rd andI at a height to give clearance to ,the outer.

ends of the extended type-bars 7. By a son of the raising and bringing forward of the front rail 39 and associated parts,

the front carriage-bar 36 is corresponding#l ly raised and brought forward, the carriage ends 35 being correspondingly raised and len hened at their forward ends, as is clearly s own in Figure 1. The front rail 39, the front framebar 171 and margin-gage rod 172 are secured at their ends to a pair of bracket-members 173 mounted upon and extending forwardly and upwardly from the upper ends of the fra1ne-posts 105, thereby providing for the raising and moving` for` ward of the front rail 39 and its associated parts, merely f attaching the bracket-members 173 to tie usual Underwood front frame-posts 105, without the necessity of lengthening these posts, whereby the usual y Underwood frame-posts 105 may be utilized in he present invention, Each bracketnie ber 173 is secured to the outer side of the adjacent frame-post 105 by means ofil a rear screw 174 and a forward screw 175, which is shown as coincident with and which may form a journal for the rock-shaft 104. It may be noted in this connection that the screws 174 and 175 occu y substantially the same locations that in t e standard Underwood machine would be occupied by the ends of the front rail 39 and margin-gage rod 172, res'lpectively.

he margin-gage or margin-stop devices carried by the margin-gage rod 172 may be, and as shown are, substantially the same as are found in the standard Underwood typewriting machine. A right-hand margin-stop 176, Flgures 1 and 4, has a spring-pressed paul-member 177 engageable with left-wardly-inclined rack-teeth 178 upon the front face of the front rail 39, and disengageable therefrom by squeezing together a pair of forwardl -proJecting finger- pieces 179 and 180, in or er to set the margin-stop 176 towards the right, itl being freely slidable towards the leftby reason of the inclined rack-forming teeth 178. The margin-stop 176 extends below and rearwardly beyond the front rail 39 to provide a carriage-stop 181, which is engageable `by a small lug or shoulder 182 carried by the inner end of a release-lever 183, pivoted at 184 on the front bar 36 of the carriage, and provided at its outer end with anupstanding finger-piece 185, which, when depressed, will djsengage the stop-lug 182 from the sto 181, to provide for moving the carriage fart er towards the right when desired, as is usual in the standard Underwood machine.A The margin-stop 176 is provided with a usual index or pointer 186 to oven-lie the lowerl margin of a usual scale-plate 187 mountedV upon the transverse frame-bar 171. A left hand margin-stop 188 carries a pointer' 189 .to co-operate with the scaleplata.y 187, and has forwardly-projecting finger- 'reces 190 andA 191. which, when presse together, will release the margin- Stop'fmign ,Si rack-bar 192, having rack-teeth '193 inlined oppositely to the rack-teeth 178 yon the front rail 39. The rack-bar 192 is mounted at its ends to swing upon the niargin-gage rod 172 by means of arms 194 on the ends of the rack-bar 192. so as to be operated in the usual manner by a bell-ringing and line-locking device, not shown, but which may be substantially the same as in the standard Underwood typewriting machine. The housing 37, on the front carriage-bar 36, carries a usual pointer 195 to co-operate with the scale-plate 187.

It will be understood that many features of the invention are also useful where only a single alphabet or gamut of types is employed, in cases where it is desired to employ a large number of special types or characters in connection with such single alphabet or set, whether or not such single set i cludes both upper and lower case letters ldr upper-caseletters only; it being apparent that the invention can be used for placing an enormous number of specialcharacters at the disposal of the operator, if dcshed.y It is not essential in all ways of carrying out certain features of the invention,

(lll

that more than three types be placed on each bar. Certain features, as, for example, the type-action, are useful where each type-bar carries only two ty es, or even one.

Variations may )c resorted to within the, scope of the inve tion, and portions of thc improvements may be used without others.

Having thus described my invention, I claim:

1. In a front-strike type-bar double type` writing machine, the combination with a platen, ot' two sets of related types. leveractnated mechanism including relatively mo\ able. winner-ted. rocking elements operable to change and maintain a set relation between said platen and the two sets of types to bring into active use either set, a level', means connecting said lever to said rocking elements. means to support said platen. and ker-actuated means connected to said platensupport and operable subsequent to the setting ot the rocking elements lto ease-shift the platen for the active set. of types to promote typing in upper-ease characters.

Q. In a front-strike type-bar double typewriting machine, in combination, a platen. a .sel of type-bars each having two sets ot' types thereon arranged longitudinally thereof. and each set of types comprising upper-rase and lower-ease types, the platen being settalileV vfor bringing into use either set ot' types to the exclusion of the other shiftable to bring into use the upper-case types of whichever set of t pes may be in use, a convertermechanism or setting the platen from either one of two normal positions, to bring into use either set of types to the exclusion of the other set, and case-shifting means controlled by said converter-mechanism to be made etici-tive thereby for ease-shifting the platen from either normal position to easeshift positions, for bringing into use the upper-Case types ol whichever set of types may be in use.

fi. In a front-strike type-bar double typewriting machine, in combination, a platen, a set. of type-bars each having tfsvo sets of types thereon arranged longitudinally thereof, and

each set oi' types comprising.upper-ease and lower-ease types` the, platen-and the set of type-hars being relatively settable for bringing into use either set of types to the exclusion of the other set, the platen being mounted for case-shift movement to bring into use the upper-ease types of whichever set of tvpes may he in use, a converter-mechanisin for relativclysctting the platen and the set of type-liars. from either one to tle other of two different normal relative posi ions. to bring into use either set of types to the exclusion of the other set, and ease-shifting means controlled bv said converter-mechas* nism to be made efi'eetiv'e thereby for easeshit'ting the platen from elther of its normal positions to a case-shift position for bringing into use theouppencase types of whichever set of types ma be in use.

4. In a front-str' type-har double typewriting machine, in combination, a set of type-bars each havin two sete oftypes thereon arranged longitu inally thereo, and each set o f types comprising yupper-case and lower-case types, a platen set'` `le for bringingI into use either'set of. tf1, es t0 the exclusion of the other set, the platen and the set of type-barsbeing relatively shiftable to bring into use the upper-case types of whichever set of types maybe in use, a convertermechanism for setting the platen, from either one to the other of two normal positions, for bringinginto use either set of types to the exclusion of the other set, and caseshifting means controlled by said convertermechanism to be made effective thereby for relatively case-shifting the platennd the set of type-bars from either of their reletive normal positions to-relative case-shift positions for bringing into use the uppercase types of whichever. sct of types may he in use. ,i

5. In a front-strike type-bar double typewriting machine, incombination, a. set of type-bars each having two sets of types thereon arranged longitudinally thereof, and each set of types comprising upper-ease and lower-case types, a platen mounted to be settable for bringing into use either set of types to the exclusion ofthe other set, and mounted for case-shift movement for brin ing into use the upper-case types of whic ever` set of types may be in use, u convertermechanism for settin'gthe platen. from either one to the other of two normal positions, for bringing into use'ei'ther set of types to the exclusion of the other set-v and case-shifting means controlled bv said converter-mechanism to be made effective thereby for caseshifting the platen, from either of its normal positions to a. case-shift position, for bringing into use the upper-case types of whichever set of types may bein use.

6. In a front-strike type-bar double typewriting machine, invcombination, a platen, a set of type-bars each having two sets of types thereon arranged longitudinally thereof, and each set of types comprising upper-case and lower-case types, the platen being settable for bringing into use either set of types to the exclusion of the other set and also shiftable to bring into use the upper-case types of whichever set of may `n use, a converter-mechanism or setting the platen from either one of' two normal positions to bring into use either ,set of types to the exclusion of the other set. a single shift-key. and a shift-key-operated connection settable by means of said converter-mechanism to enable the shift-key to be effective for case-shifting the platen from either normal position for bringing into use the upper case types set of types may be in use.

7. In a front-strike type-'bar double typewriting machine, in combination, a set of type-bars each having two sets of types t ereon arranged longitudinally thereof, and each set of types comprising upper-case and lower-case types, a platen mounted to be settable for bringing into use either set of types to the exclusion of the `other set, and mounted for case-shift movement for brin ing into use the upper-case typesof whic ever set of ty es may be in use, a convertermechanism or setting the platen, Afrom either one ato the other of two different normal positions, for brin 'ng vinto use either set of types to the excusion of the other set, means for maintaining the platen at whichever of its normal positions 1t may be set by said converter-mechanism, a single shift-key, and a shift-key-operate'd connection settable by means of said convertermechanism corres ondingly to thesetting of the platen to ena le the shift-key to be effective for case-shifting the platen from either one or the other of its normal positions to a case-shift position for bringing into use the upper-ease-types of whichever set of types may be in use.

8.' In a front-strike type-bar double typewiiting machine, in combination, a set of type-bars each having four types thereon arranged in a now or series longitudinally of whichever 'thereof and fori'ning a lower set of types and an upper set of types of two types each, the two intermediate types beingpWer-case types of therespective sets ot types, and t e two end ty 'es in the series being `uppercase types of t ie respective sets of `types a platen mounted 'to be substantially vertically settable from-one to the other of a lower and an upper normal position, for typing by means of thelower-case types of one set of types, or for typing b means of thelowercase types of the ot er 'set of types, the platen being case-shiftable downwardly A from its lower noi-'mal position to a caseshift position for typing by meaiis ofthe lowermost or upper-case types of thelower set of types, and being case-shiftable upwardl from its uppernorinal ition to a case-shift position or typing y Vmeans of the uppermost or upper-case types of the upper set of types, a converter-mechanism includin f cam-actuated means for setting and locking the platen to either one or the other of its two normal positions. and means for case-shifting .the platen downwardl from its lower normal position, and' upwar l from its upper normall position, to one or the other of two final case-shift positions,

for typingby means of the upper-case types of the respective sets oftypes.

9. In a front-strike type-bar double typewriting machine, iii combination,l a neto! vsettable from one to the other of a lower and an upper normal K position. for typing by means of the lower-case types of one set of types, or for typing b means of the lower- Vcase types of the ot er set of types, the

downwardly man being case-shiftable its lower normal position to a case- 'I shift position for typing by means of the lowermeetor upper-case types of the lower set of pes, and being case-shiftable upwardl rom its upper normal osition to a case ift position for typing y means of the uppermost or upper-case types of the upper set of types, a converter-mechanism for settin the platen to either one or the other of its two normal positions, a single shift-key, and a connection for the shift-key settable by means o said converter-mechanism to render the shift-key effective to shift the platen downwardly from its lower normal position for t ping by means of the upper-case ty s o the lower set of types, or to shift e platen upwardly from its upper normalposition for typing by means o the upper-case` t the platen being automatically returna from either o'f its said case-shift positions to the corresponding normal position.

10. In a front-strike ty baidouble typewriting machine, in com ination, a set `of type-bars each having four types thereon arin a row or series lon tudinally thereof and {orminga lower set o types and an upper set of types of two types each, the two intermediate types being lower-case types of the respective sets of t pes, and theA two end types` in the-series inguppercase types of the respective sets of types a platen-mounted to be substantially vertically settable from one to the other of a lower and an upper normal position, for typing by `means of the lower-case types of one set of types, or for-t ing b means of the lowercase types of t e o er set of types, the

laten being case-'shiftable downwardly rom its lower normal positionto a case- 'shiftpositon for typing by means of the lowermost or upper-case types of thelower -set of `and being case-shiftable .upwardslly m its upper normal osition to a caseift position or typing y means-of the uppermost or upper-case types of the of types, a converter-mechanism platen to either one or the itions a single upper eet for of th'e'upper set of i

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