US1115069A - Type-writer. - Google Patents

Description

DE WITT C. HARRIS.

TYPE WRITER Aww. ANON HLM) MAR. 1z0, 1913.

i Patented 00E. 27, 1914:.

Cgguzwqw zama azz-@rug STA'QSLWENT @iiiilCE DE WITT C. HARRIS, F FOND DU LAC, WISCONSIN, ASSJIGNOR, BY MBSNE ASSIEl MENTS, TO HARRIS TYPEWVRITER MANUFACTURING COMPANY, OF FOND DU Ll'l, WISCONSIN, A CORPORATION 0F WISCONSIN.

TYlE-WRITER.

Specification of Letters Patent.

1nteiited0et.27, 19114.

No. 690,756. Divided and this application .tiled March 20,

1913. Seriellv No. 755,583.

To t/Z ywhom it may oor/,own

lle it known that I, De iVrr'r C. l-lAnnIs, n citizen ot' the United States, residing,r nt `Fond dn Lne, in the county ot' Fond du Lne nntl Stute of lViseonsin, hnve invented eertnin new und useful 'Improvements in TypelVritei-s, of which the following is n Specitiention.

'lhe olijeet ot' this invention is to provide nn improved key lever vfor typewritingI mnchinos.

In the neeoinpnnying drttwingg's, Figure l is ,n 'lrngmentnl vertienl sertionnl View through n tylnewriter, illustrntingg :in improved key lever embodying my inventionJ4 itig. 2 is n similar view, but showing n hey lever ol. dil'l'erent toi-m und dimensions.

in the drawings, the impresssion platten is itnlitntted hy the. nninernl ti being n type lim' pivotnlly mounted on n type segment 7 und nrrnnged .to nornmlly rest upon :in :trennte pnd 8.

l) intlientes n stntionnry irztme whit-h muy he oll :my suitzrlile lorm, :ind is monnted in the mnin 'l'rumeworli of the mnehine. A seriez-1 olI key levers lO, ll :ire pivotullv mounted npon :l horizontnl shnl't li! whielt is lixed in the 'l'rnme Si. llrtrh ol the ltey levers is eonnerted with one ol' the type lmr` t3 by n linl; 13, n pivoted liellwrunli lever lt, :nolo linl; l5. rllte swingingl movements olA the key levers muy lie limited hy :t atop devit-e` lo ol' any snitzlhle liorm. llte keys Ii'. upon the onter ends,l olE the hey levers` lt). tl. nre nsnnlly :zrrnngged in three or more tiers. :intl l'or this purpose the li'ey levers :tre tonde in three or more dill'ertntt lengths. ln the present inf-traire` l lmve illnr-llmted only two lengths olE key levers.

hey lever eonstrurt'ed in nrrortlnnee with my invention hns its rem- 1to1-tion lient lun-l.: upon itsell' to l'orm :in nrm itl. or in other words, the level' eomprises :t liody portion :ind nn :trm t8 lyin;r nlonejside enel! other und inteptfrttlly ronneeted :it one end. ihe ltey levermny he eonveniently stumped from Sheet metal. The :trm IS is pivoled upon the sthnflt l2. und the body ol1 the lever, in the present instnnee extends lienenth snid shnl't. This nrrnngement provides n resilieney in the ltey le\er whit-h nllord.` :1n elnstie und egreenlile tout-h. nml eliminntes ohjertionnlile f:till'ne;-'.= in the :tt-tion. this lieing :l re

snit whieh is very desirnhle. In order that lthe resilieney of the lcey levers may be unitorm, the portions ot seid levers rein-wurd ot the pivot shtttt 12 nre mede in tliii'erent lengths l'or the ditl'erent series or' levers, .so ns to eonipensnte lor the ditlerenee inthe leverage o't their torwind portions. Thus the shortest levers have longer portions rearwnrd ot the pivot shtli't then the longer 1evers. The l'orwnrd ends ol the levers are normally maintained in their uppermost position hy n series o'l' coiled springs4 I9, eneh haivinzer its` upper end engaging; in nn openingjl rit) in one or the key levers retirwnrd ol the pivot slnll't l2, :ind beingsel enred :it its lower end to :t snitnhle'sn.- tlonzny pnrt on the lrznne l). lrelernhly, :t plurality ot' optmings Qt) is provided 1in eurh ot' the leverel It), 1l, the springs 19 beH ingr :tttnehet'l to the longer hey levers :it ief` speetively `:greater distnnres renrwnrdly from'l the shul't v1; thun to the shorter levers. Vlhns the springs exert the "rentes-t pull npon the longest lever The tum-tion oi' the springs ll) is to hold the hey levers in their norlnnl position und to retnrn Huid key levers to snt'h position nlter n depression olf the levers. rio lzn :1s the springs tend to resist, thev depression ol the hey levers, the 'l'tirmeljl"wonld he olviertitnmhle, und this, is espeeinlly trnO when the operntor is writing lnst und the hey levers :tre lieingr depressed Irv qnielc etrolces. liet'unseY more l'ovee is retp. :ed to move the pnt-lis ol the hey lover :trtion vnddearly :nid rnpidly; :nnl it; is therefore de- :#irnlilo nntler there eirenntst'nnees tlntl'. the leunt possilile resirvlinnee he oll'ered l'o the deptesrion olE the liey levers. The present ron fitzrnrtion provides l'or this in the following manner: When one olI the hey levers is depressed slmrply :intl rztpidly, the le-y lever body yieldsl dorwnwznvlly :lwny l'rom the :trin lo, und tlms` while the vnrious parts ol' the key lever :n'tion nre oper-.tiled in the usual wny to rni::e the type lizlr tt, the openingr Q() in whit-h the upper end ol' the spring lll is ntlnehed does not truvel upwnrdly to pince :ultlitionnl tension upon the spring ll), lint sztid spring renmins :it: 1-1t|listzlntinlly the .sinne tension on neeount olthe rolntive yielding' movement hetween the hotly oll the key lever und the :trm lb'. 'l`hns when the oper- :ttor is writingi lust, the ntldilionnl reiv'istnllee to the depression of the key levers, which would ordinarily be exerted by the springs 19 by reason of their increased tension, is eliminated.

li am aware that changes in proportion and arrangement of parts may be made without 'departing from the scope of my invention, and ll therefore' do not limit myself to grally connected at one end, one of said portions being pivotally mounted, and the other portion extending from the point of connection of the two portions toward and past the pivot point and carrying a key on its free end.

3. In a typewriter, a key lever having two portions integrally connected together, one of said portions being fulcrum'ed, and` the other portion lying alongside of and extending in opposite directions from the fulcrum point and being arranged to yield with relak tion to the first mentioned portion.

4c. In a typewriter, a key lever comprising a body, and an arm lying'alongside each other and integrally connected at one end, a shaft upon which said arm is pivoted, said body extending beneath said shaft, and a key carried by the body whereby the body will yield away from said arm and said shaft when saidkey is struck.

5. In a typewriter1 a key lever having a portion bent back upon itself to provide resiliency between the body of the key lever and said portion and a fulcruni engaging the lever at a point forward of the bend therein.

an arm, and a shaft upon which said arm is pivoted, the body of the lever extending beneath said shaft whereby resiliency is provided in the lkey lever.

7. In a typewriter, a key lever having its rear portion bent back upon itself to form an arm, and a shaft upon which said arm is pivoted, whereby resiliency is provided between the body of the lever and said arm, and a spring attached to said lever rearwardly of said shaft, said lever being arranged to yield whenstruck a quick short blow to maintain the tension of said spring substantially constant.

8. In a typewriter, a shaft, a series of key levers each having its rear portion bent back upon itself to form an arm, said arm being pivoted on said shaft and the body of each lever extending beneath said shaft whereby resiliency is provided between the body and said arm, and a series of tension springs each attached to one of said levers rearwardly of said shaft, the body of said levers being arranged to yield downwardly away from the arms thereof when struck a quick short blow, whereby the tension of said springs is maintained Substantially constant.

9. In a typewriter, a shaft, and a series of key levers each comprising a body portion and an arm, the arms of said levers being pivoted upon said shaft and the bodies extending beneath said shaft, said bodies being of different lengths, and the shorter bodies extending farther rearwardly from said shaft than the longer bodies, whereby uniform resilience is obtained.

10. In a typewriter, a key lever compris- I ing a body portion and an arm yieldable with relation to each other, a key mounted on the body portion, and a fulcrum'engaging the arm at a point between the ends of said body portion.

11. In a typewriter, a key lever comprisving a `body portion and an arm lying one above the other and yieldably connected at their rear ends, a. key mounted on said body portion, and a fulcrum engaging said arm.

In testimony whereof I ailix my signature in the presence of two witnesses.

DE WITT C. HAR-RS.

" Vitnesses ARTHUR GRAF, MARY FOREN.

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