US477237A - james -x - Google Patents

Description

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[Be it. known that I, JAMES A. WATSON, a citizen of the United States, residing at Tashington, inthe District of Columbia, have in'- vented certain new and kuseful Improvements inType-Vyriting Machinegofwhich'the fol` f lowingis ai specification.

' printingpoint to travel relatively over the` My invention relates' to ribhon-feeding de? vicesfortype-ivriters; and it'ccnsistsin mecii-- nnism for feeding the ribbon automatically both'lengthwise and widthwise, so as to use itsentiresnrfacefas it `passes once 'through the machine. o

InA theV accompanying drawings, in "which like'v reference-signs'reier to similar parts throughout the several views, Fignre 1 is 'a plan view of mechanism embodying my invention, part of' the frame'of a type-Writer being Vshown i'ndotted outline. Fig. 2 is4 an elevation of thesame includingl so much' of a typewriterfram'eias is necessary to support the mechanism. i Figs. 3 and 4 are frontend views of the spool-supports and spools;-`1 and Fig. 5 is a .View of one of the spool-supports, looking from the middle of the machine.

In, a companion application, Serial 'No. 428,384, filed April 8, 1892,'1 have shown 'and described mechanism for imparting' a-simultaneous rotary movement to two spool-snpports, the spools being maintained in a constant relation to each other, whereby the ribbon is also rotated bodily, ths causing the ribbon in acircle inscribed between the margins.. The machine described in s aid'a,r )plication moves the ribbon longitudinally but once during each lateral rotation. In the present invention the spool-supports are rotated in a manner substantially .similar to that des scribedA in the above-mentioned application; ont the ribbon is moved lengthwise each time the spool-supperts are moved, thereby cansing the printing-point to.travel relatively 4to the ribbon in a continuons overlapping spiral line, suchas is indicated in Fig. 1 of the drawings. The present invention furthermore diierfs, from that described in theother application in various details of construction, which will be hereinafter pointedA out.

Referring to the drawings, indicates the ribbon, asmall portion only being shown, and -2 indicates the spools. Each ot the spools is 'of the type-Writer are has the eiect'of itspinion and engaging mounted in a spool-support' consisti-ngof 'a p'ieceofA sheet metaljshaped and bent to form abase 3 and uprights4,.the iuprights being provided with bearingsfor the. spool-sl1aftsl Ribbon-guides 5 are alsoconstt'zncted of sheet; metal 'and are preierably:ngadefintegralrvith the base. The spool-snppc'rtsjare both se# curely fastened to a curved 'onnectingrodd and the supports andtheir connectingsrod are' vcarried by ing-crank samethro'w.' The crank 8 "ismounted upon ingfshat't, upon which is '8, all of 'said cranks beingv digibo- The iatchet-wheel is' preferablyellipticai "anda 'isoperated by a pawl lliupon an arm"12'oi-a rockfshaft 13. Therock shaft may be 'vifl bra'tedinany convenient Way, such ash being. connected to keyflevers.- l 1 Upon each of the spool-shafts is a bevcl- .gear 14, which mayformone end of 'thespooh if desired, and upon the crank-pins of two of 15, adapted to meshI upper ends of the the cranks are pinions with the gearsfii.' The spool-shafts 16 are their bearings to a snicient extentto engage and disengage `the gears 14 Withthepinions, and for the purpose of holding'them eitherin or ont of mesh with the pinionsA I provide Y .7 a universal bar under the grooves 17 in the spool-shafts andsprings 18,

arranged to press into the grooves and prevent the shafts from shifting lengthwise.l excepting when they are moved purposely. As shown, there is agro-ove 17 u'pcnv each end'of each shaft; and a spring upon each bearing, the spring upon 'one bearing bcingvadapted t lockthe gear in mesh with the pinion and the. spring upon'the opposite bearing being adapted to locklit 'out ot' engagement ltherewith.` The crank 7 and pinion 15 at one side -v 'in the rear'of the spool and the crank. and pinion upon the opposite side of the typewriter' are in front'ot the spool. In order to drive 'theribbon in th'edirection of 4the arrow, pushed toward the rear of the machine, as shown in Fig. 1. When itis-desired to change the direction of the ribbon, both spools are drawn' toward the front of the machine, which" disengaging one spool from the other.

the spools are both' loo Y in operation the driving-crank and the idlecranks rotate sinnlteneensiy'nn eine spools end spooi-snp'glerte are rotated bodily in n piane parallel with tbe plsneof tberibben, At the seine time the spoel which is in gear witlnene of the pinions i5 is rotated upon its axis, and the ribbon thns'moved lengthwise.. The effect of these 'movements is their. tfno printing-*peint l travels relatively tc-tlle ribbon in a continuous overlapping spiral, 'as indicated by the dotted line upon the ribbon inl Figl. 'Where the loops of the spiral cross near the margins-of the ribbon, the ribbon would be used more than at other points if the rotary movement of the cranks were uniform. @Ifo correct this is the function et the elliptical ratchetwheel 10. The ratchet,- wheel 10 causes the ribbon to travel faster when its margin is opposite the printingpoint v than during other` parts of itsrotation, and in,

this way all parts of the ribbon are used snb- .stantially tothe same extent.

1. In a type-writer, the combination, with the ribbon and spools, of spool-supports, cennections between said supperts'for maintaining the spoolsA in a constant relation to 'each other, cranks for limparting n, rotary,1 movement to the spool-supports, and connections between the cranks and the spools for rotating the latter ,es the cranks revolve, substantially as described.' l

2, In n type-writer, 4the combination, with the-ribbon and spools, of spool-supports, connections between said supports for maintaining tjhe s,poo1s in @constant relation to each otbelggcranksfor imparting n rotary movenient te' tbe speel-supports, and 4,goers upon,

the creek-pins and spool-shafts for rotating the spools when the cranks are rotated, there.-I by impertinge. spiral movement. to the ribbon, substantially es described.

3. 'In n type-Writer, the lribbon endribben-spools, of spool-snpports, spool-shafts mounted in said supports,

1 cranks for imparting rotary movement to said the ,combilmtion, with supports, geants mounted upon the orang-pins, and gears mounted. upon the spool-shafts, said f grooves 17 at each end, of the spool-supports f having bearings 4, springs 18, attached to the bearings, the cranks for `imparting n rtnry movement to the spool s`npports, `and the gears mounted, respectively, upon the spoolshnfts and the crank-pins, substnntiallyns described` i v In testimony whereof l atix my signature inv presence of two witnesses.

JAMES A. WATSON.

iVithesses: v

'WILL E. NEFF, Aren N, Donson.

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