US1646464A - Pitman connection - Google Patents

Description

J. STURROCK PITMAN GoNNEqTIoN Filed March l5. 1922l Ilwfeefor.

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Teas

V xiii' p v`conneetirig:the 'pitmanffromlf said Vfparts. i

',y A ur'theroloj'eet is to provide a pit-` i I i i205 Clamping member- While'in its 'clamping position; I

l:Patented Octo `25', 19271" D rconfliwiior fQHIQAeO,ILiNoISgvAg Confinement Q1? 1 i f i prrr/LAN ooivivnorrori. l

Application filed Maren 13,l 1 9212-5Seria1/:0,;543)212 i.

, Vfmvention relates tov pitman -eonnectionV especially adapted fior vmowers-and like '.CllfGS-- y Y The object ofthe invention. is. to provide Y VVfmeans4 vvherebvthe Wear,betiveentheipib:

l the associating or cO-Operating V`infin and parte v'of ,the :machine on'fxv'hich the pitman isr sed is automatically compensated for,`

hezfpart's atall timesare' held in proper stnient. f 1 j'l..

uitherobject isto 'provide means ifor and quickly connecting the'pitman-to' f man onnectionfin which the number of movfable'p'ar-ts are reduced togafminimum. Y I I :Thesezand other ebjects'are' attained by the 1v "Iu'se'f'ii'i- 'connectionfvvit'h pitman straps of a byV means offwhich thesestrapsar'e forced towardv eachother orsepa-qv yratedfromreach y otlieryaiid urtherf'by the] usent a lcranklmember in connection'ivith 1 fthe' clamping meniberthei latter is prevented` f' i. 25;.from' -becrning' accidentally unclamped A Referring tothe accompanying drawings, 'ilu-havefor the purpose of villustration' shown "one eiribodiiiient"Whiclnmy 'invention may., :iw'assume in practice.` y

' lnu'the drawings,wherein likeV characters e represent the same parts throughout the sev-j. *Y*j eiulvie'Ws-4'l e lfpis a V-'plan view the clamping member in. its

*Fig 4 is a plan view: par

e sho ving Athe clamping member in its'inoperative position.' C

@Thepitman illustijatedfinconnection With;-

' formed as anl integralfzpartQofthe Crank@ 27 ,Y

`isa camrportion mand a flat lshoulder porv thei'sh'oivi'ng ofmyinvention embodies tivo y cessful operation 'of lthe construction. vThe f straps 11 and 12 are secured to the Wood por-V tion 13 of the pitmanby means of a series of rivets 141 The gras'sward end of the pitf Vvman straps 11 and 12varep`r0vided with the l lpartsrizo-operating therewith7 tfand dis l of the stubbleivard` g 35 (end of a Vpitma'n 'embodying my improve.

2 isa side elevational view ofFig'. 1 -3 'is jan elevational View. partly inY v 'I ,Jfsecti'on 'showing i Idinoperative position; and 1 1 l' I i tly in .sect/ion:

15 and 16 respectively,which ar .adapted-toi' l receive and :form the connection vv-ith' the v spherical; portions-formed 4on theggknife; hidf 4lherouter.: surfaces otheseiportion's, lld 16 are provided with f beveled suracesqg 17 and 181er 'the-purposes hereinafter; set forth; z Adjacent. these Vbeveledj surfacesf'f17 fand1118- :5. andextending longit'udinally` Withfresp'ectto the straps 11anda12-are elongatedslotte'd Y apertures`V 19 and; 20, -Avhich tern'rinately in-` opl' positely disposedcorrespoirdingfbevelehsurq ,aces121 and 22-in th'efstrapsf11 fand"12;re f Y 1specti're1y:Positioned vbetvveerr the' straps;11' f and`v 12 i adjacent 'the i grassivard, end of fthev -Wood portion' 13 i are tivo i {enlarged",` bearing lportions 23and=211 providedaivith registering -apertii'res -25 .and 26;-Yirdaptedi ,toi--pivotallyfref ceiveav crank .member 27( @The crankizmember 2711s 'providedliv-ithla,` laterallyextending v arm A28, vhich in: turneis,providedyWitlrop:v

ypositely disposedr4 Wings` or proj ectifon'sffA 2,97 which yare,adapted to :engage lthe Aedgesj or; the'vstrapsi11andP12, as shoWn-iniFige2fin the; normal operation y@flocking the,V clamp? Y ing member.` f :Theiarm128 ofithe ',.cranky27 isprovided Witha slotted; aperture 30,1 adapted ito-,slidably receiv'eithe:stubbleward vend 31ik ofiafclaiiiping inemberx2- The-,clamping stubbleivardl end 31 of the cla-nr Qing' member? respectfto ythe crank 27 and contactiran, abutl The crank clampingl member'.v 'Adj-went he? 19in and:

tion 36 forthepurpose hereinafter set forth.V

A p 27is i-fiirtlher provided ywith square shanlrportion 34: ladapted to' receive a Y 1 Wrench ouother; .toolfor manipulatingithe *Y 12 32.is orovidedgivith za'slot which'perinitsa the VVclairipingim einher 32; to reciprocate; ,With l 1ng,position and.th'erel'iy,gloelr vthe,lparts in i positioiito.prevent; accidental unclaniping" l nthereoY f" 106 y' 'The 'Clamping member '.32 is providedwiui tvvo fork-extending portions 38 .and 39,

gage the beveled surfaces 17 -andflS respecfwhch 'in tum-are' pw'vide'dvwiih oppositeiy u ,fdiverging surfaces LMland 41 adapted fluente..

tively Aforclamping the straps 11 and 12101" l thekrnife head lofthe mower. Similarly, ,Y

clampingv member 32 is provided with stubblewerdlyinclined surfaces 42 and 43 adapt- .edlto engage the inclined surfaces--2lxzind 22-f` of the straps ll end 12 in the normal opera-V tion, of spreading or Vseparating Vthe straps l11 :sind `12pr aiidbdsconnectiiig Vtli'e7pitinen from l' Y pli'shed by swinging tlie'cr'nk 27 tothe posi- -tion shown kinv Fig. 3, with-drawing the clamping member 32 from 'the surfaces 17V and 18 and spreading the straps by forcing in rigqif L5. v 4agiifangularly :disposed shank `44,.which in the clamping member to th'e3position shown The clamping member 'is provided with turn carries-'a' spring *457.11 The grassward endofY the spring 45 is normally held in con- '.tact'with the Clainpin'g'member v32 bymeans -1 fof-jen enlarged Voi-ac'ollzii portion .46. The fstubblewardend .oftlie spring toissup- 1 ported 'onthe carni surface '35` of the crank n 27fby mefins'of l, washer 47, shown sin,

l Figgf.V It will be noted that iis'tliecrank 'is' thrown vfrom thepositioln shown in Fig. 3

-to Vthe position show-n,v inl Fig(r 2- ,thatV the f' `S2J-m'ey'be.recipiocated within the limits of .in jfthe slot' 37; ,"Tliet is, the member 32 may? frbe moved stubblewfirdly in a manner tocoinpress'thespring 4-5 until thelgrasswardend l '7" 'of the slot 37 strikes the pin 33 .andthugpre;- f ,Vents the accidental uiicla-mping or spread- V-ffing'of the lstraps 11 2111517125 member is provided with an angularly bent f shank 44, that an eXtra` movable partihzisl beeneliminzitedand that a very elicient and "compacteutometic pitman, which can'` be esily-jclainpedend spreadquickly, has vbeen designedf t j lVliile l have iiithis application-speci'i icelly vdescribed but one `embodiment which llniyjinvention may assume in practice, it is` of course t'obe'under'stoodthatiny invention isv not limitedutojthe specificiorm-shown herein but :maybe modified to'assume other )forms without depirting vfrom the spirit rand i `scope yo-myinvention,;it being inyintention y to'V include :all such `formsL within thescope of the appended claims'. .v Y

to secure by Letters Patent isi I .l. In a pitmen connectiome pitinzinhav- What I claim yris my invention and desire ing resilient straps, saids'trapshaving registering slots, eclamping member',having a Asliziiil( rigidly fixed theretoand et an angle to V'thel pleine'V thereofgfr` said? member,being adapted to protrude Vvthrough said straps and slidzibly engage seid straps, lsaid `'member having therein a walled slot, acrank mehr beil pivotedto said straps and connected to said clamping member, ai spring disposed between said cre-nk and said clamping member, vand ineens including the walls of the v slot in seid clamping meniberorliinitingf the yielding inoveineiit of said/.clamping member. and j preventing the Lspreading otsziidstraps.y

accidental 'i x75 2.V In ,si pinnen-connection, a-pitman having resilient strnpssaid straps havingfregistering slots, e clamping member adapted toV` protrude through said slots and slide-bly en-y 86 ing eV shrink rigidly thereto and at an gege seid straps, said clamping member hav-v .frngl'e to the plene thereof, a crankrmember pivotcd to said strapsend connected to the shiiiil of seid. clamping lmember,-a spring surrounding seid shank end disposed Vbe-` tween ,snid'ci'zmk and said clamping member, sind means formingbzi part of seid. clampiii member for clziiiiping and, spreading saidstreps; in y -r I f Iir e pitiiiaii connection, e pitinaii having` slotted resilient strapse Aclamping meml b'erh-:iving 'a shankrigidlyiixedl thereto-'and f eten angle to the` plane'thereof,.saidmemf' bei' being adapted to protrude through they slots in the straps, a Y*crank carried bythe v i l, straps.Y eindliaivingfaJ shoulder portion adapt- Irt willbe further noted vby the constructionebove'describechiii whichthe clamping edto ectuzite-the lclamping member, 'and ineens causing vthe lclamping member. and

shoulder portion on the crank to abut where-V by accidental :unclemping of the straps is Y prevented. f i,

4l. In e pitman vconnectioin-aJ pitinanhav-A ing resilient straps, 'e clampingjmemberfor f the straps, said member'fheving a shank rigidly .iixed thereto and at 'aneiigle tothe plane-thereof, agcraiikhaving e shoulder portion pivoted between the straps, and kaJ .parts are in clamping, position tofpreventaccidental iin'clampiiig thereof In testimony whereof I- aii'iX my signetuiel JOHN ernennen.

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