2 1,835,094 up rotates tlie, eliiite into the clofod positioll, -cit the saiiie, tiiiie rotatinthe underetit -ate to slitit off flow tliougli if desii-ed the (yate nii,y be separately operated. The loweriiiost of tl-ie biffle plates C instead of beiii- fixed in the pivoted clitite is pivoted therein. It is so I)o,@it-ioiied that it ,is located above the, iioriiial flov,@ Iiiie@ of ina@teri,il as it flows freely doavii tlii,oii(Y]i tl)e fixed and I)ivoted chtite fi-oi-i-i the h6ppet@ to the skip btit as ii-iaterial 1)il(@,q iip, iii the iiioutli of the slcip and ],)acl@s tip in the eliiit(,,, this flowiiil- streai-n of lll,,tferial btelcs up arrainst oi- iinpinges tipoii tlie, pivot.@e,(l btffle plate C sNN,ino-s- it. to the ri,alit iiito the zn POslt,ioll showii iii Figure 2, tlie. ton,(,I"t).o or lpver C:l to en-a.-e the i-oller C2 ().II tlle zn el switch C3 which switch controls ,t circuit tli-rou-h the cable C4 to the conti-ol P'lliel to zn s@art the inotor operttiii- the h(@istiii(, eii20 t-I oline. C-@, is a, Iiiiiit rod oi@ stop issociated witb tn tile bra;cket Cc' to consti-ain tlie angtilar i'@pl,teeinent of the meiiiber oiily witliiii 1)"edeteriniiied Iiii-iits. It will be obviolis fi-oiii 25 t.Iiis arraiigement tliat a-s sooii as tli(, jyittei-ial baelted up, tlic@ flowiii(Y i-tia;tei-ial 01tl-ie streaiii of iij,,ttei-ial i-,,iii I)iiild iip to a lie biffle, plate, piiiges lipon t point which iii-i and causes ol)erition of the switeli but tllj. 30 swltch operation caniiot tal@e, pl.Lee uiitil stich b,.iclziD(y up h-.is ocelirred an(]. since -,ueh 1),iclciiig up c,,tniiot oceiii@ uiitil tlie slcip is filled tlie lioistiiio, engiiie will only be sttrte(I wheii the,@ Sl@i5 is filled, thus avoiding del,,ty. dified ' r sliown in Fio@iii-cs A .35 Ill the iiio Lo M a,nd 5, evei-ytliiiig is t-l-iG, sinite e-xeel)t tlllt here -,Ne lia.i,e a. slio;litly (lifferent foriii of pivoted chtite D ivitli the iiiidere,,t ate geiier,illy iiit6gral witli the clitite iiid wi 40 the cliute closecl tbove I.Iln.d (liseliargiiig,lt side rither than it its eild iitto tlie,. this ari-aiigei-n(-@nt the swiiiging I)Iate, DI is oii 0 the eiid of the clitite -,viid 1)i-o ' jects ii)to t], slcip but at i. I)oint wliei-e, it is iiot - ittli@ck(,(l 45 by tl-ie 4i-eaiii of iii-,tterial iiiitil tlie, biicl@c,,t-, is fliled and rtiaterii,l is bacl,-o(l up -Ls SlION-,Il ill Figtire 5 ; iviien the i-, so bicked iip, the iiiaterial snvinas the i)late aiicl c@i-iisc,.s the fin(reiD2 to eii-a-e the sivit-ch btiti-,on DI oii zn e,@ tio the switeli D' to start the motor. W' Tii the fiirther iiiodified forn-i slio. .1 Ill Figtires 6 ,Liid 7, the switch E is iiiotiiite,-l (11 the bottom of the lolder ciiiite iiid t,lie will of the bucket witli tlie, coiiti-ol. qi@in E2 eXr)5 tendillo,- tlirougl-i tlie. W,-ill of the I)iielCO,4- ill C..p_ position to tlie, siviteli lever E3. Wileii t,lie iiiaterial bacl@s up in the biielcet itsi@lf not ' "I the clil-ite it il.1, swit(,Ii operatioii takes place ,is sli(>Avii iii Figtire 7@ Of coiirse, wlle" t-11(@ 00 bucket sti,rts til) the rotatioii 6f tli(@ iiiove,s the ,witch lever E3 otit of tlle p' tlie, fil)(Yer oil t-.Iie swill(-Tillo. 1)1',Ite. It]' of tn -1 . In the arraiio-einent slioivn in Figiires 8 05 I'llid 9, a ftirther modification is shoiiii. ITere the switch F is oji ,t bracket r(-nioied from the cliiite. The chute F' is fixed. 'Diere is iio I)ivoted chute, only an underctit gate F2. The swiiioijig plate F3 iS pivoted on the 1)ucket. ft ai F4 exteiidin- tlirougli a liole iii the bticket to cii'Ya-e the switeli 70 n zn lever F5. Ilere again the material piles up iii the bucket to operate the switch to start the lioistin(y iiiotor. All of the ari-angements ab6ve disclosed liave one essential factor iii common, iname75 13,, the, switeli is controlled by some kind of a illeinber. It iiiay be a swinging plate, it niay be i push btitton, flexible diaphra,-ni or aiiy'thij)g which feels the effect of the pi-essure or iiiipact 6f the material when a 80 siifficieiit qliaiitity of inatcrial has piled up iilto the bucket or backed up into the chute qo that the bileket or slcip is filled. Only Nvlieii material has come in to this extent does thi,@,, sedsitive niember@feel the effect of the 85 iiiaterial aiid when it does feel it then and then only is it displaced to close the switch to c;@utrt the bucket lioistiii(r motor. t!l Of coiirse, a device such as this does not ill a,ily -vvay iiitei-fere witli the ordinary push go biittoji coiitrol aiid it can even be arranged ill connection witli a nori-nal and predetermip tir,,, control if that is desirable. My iiivention concerns itself only witli ivliit happens at the fillid- end of the bucket 05 or skip exciirsion While it may ])erhaps liippeli that unde'r soi-ne conditions it takes loiio,er to duinp the sl@ip than it does to fill it, i-ii)T invejitioii by redticiiig to t iniiiii-niiiii the time necessary to delay the sIKip for fill100 ii-ig iiial,:es possible a closer, more rapid methocl of coiitrol. If it shotilcl happen that the diiii-iping was tl-ie loilger of the two actions, 110 harm %votild be done and n-iy coiitrol iiietliod woiilcl still be equally valuable as it would 105 ciia,ble the desioiier to dismiss to some exteiit f@i,oiii liis hand:the time factor iiivolving the loading of the skipI litve used the word btilk in -,t iiumber of places in the specificition alid, clain-i and it 110 miist be tin(lerstood that I litve tised it in the striet sens,- distin-uisliing bulk or volume f-i-om weight. -Al -control is responsive to 0 y the btillz or v Itime of material as distinguisbed fi-oni the mass or weight of ihaterial. 115 I claiiii The @ol-nbin.,ttioii with a slcip hoist; ineltidt movqble bucket a combiiied pivoted 7 (,,Iiiite aild gate adapted at one point iii the bricket path to discharge material thereinto 120 and adapted in response to movement of the blicket awty froin the filling position to be rotatc@d tlie@eby to shut off the flow of ii-iaterial- of colitrol means comprising a switeli, ,.iid a switch opei-atiiig member 125 ii-ioui-ite(I iii permaneiit relatioii to each otlier oii the chute at a, point above the path of floiiiiia initerial in the chute the operatiiig meiiil)er being adapted to be disl)ltce(I by the pressiii-e of iii,.i,tei-ial as it binks Lip in the

chute after the bucket is filled, to operate the switch and thereby cause riiovement of t.h,e bticket away from the filling point, there bei-n a permanent electrical connection beg tween the switch and the bucket operatin 9 mechanism. SIgned at Chicago, county of Cook, and state of Illinois, this 15th day of Jtnuary, 1930. 10 WILTIAM W. SAYER,S. 20 40 46 50 55 Go

Patented Dec. 8, 1931 1 , 8 3 5 , 0 9 4 : E ,ATE'S @p@A @,OFfFi@C @,,ST. TE-@N@T .,WXLLIAM@@w ERS,,,,OF- C I GO,,@ ILLINOIS ASSIGNOR To LINK-:BELT COX@-PANY @or SAY H,CA C@IIQAGO,-ILLINOIS.@ACOP.PoRATION-OF@ILLINQIS AUTOXATIC CONTROL, FO.R- $]KIP, BUCKETS e nu p@lickt!oA% fil ary' 23 relates: to iil'lpl-ovelill6nts in ski,p hoists, aiid@ h-,tsz for one - object to ipi-ovide ai @new atid@ @iniproved,.controll appar,,ttus and proleess iwlie@6by t]@e filling of flie@ btieliet may be more, . nicely- controlled, and@ whereby @ the ,,pau-se or @delay inLece8s:iry. at@.the,.end of. @the i@fillin (r,period,@-ta, insure'coiiiplete fillino, and guard against I lelogeing',of .,the , n-iaterial C, ,@'Stream,@and'thelikemay@b@,avoided Otlier i,,I.objpcts @w'ill app4@ar. T-rcihi time@ .,to. tiiiie @tli,roughout the. specificatioi-i ,ilid claiiiis. Referriii (, to suel-i. sIK@ip hoist.,i that sl-i w-ii s 0 583 702, d,,tted@M,.tv 4th, in iny @ @Pateiit@ N l@ 19,26@ @-it,will@.be noted that wh6n the.sldp.despoutito swind o w i @ i @ iii to discharge relation@ ivith the @ooe@ moi@th.of the slcip.aiid cau,--in(y the.olate to, open, P, iateh p rial:flows froin'.the@t76 per. tl3-ro-tigh t]@e,,fix ed cliute the pivoted,chiite or@ spout into the skip 11,@.@until.the'- material@-.fills the:skip. When it @cloesi this material banks up in@ the pivot6d chlite@and, in@@the,fixe'd @e,hute. Then by the @OPE@ration of any @suitabl6 control m(@C-Ilanism the gate, is closed. andthe. s@out or pivoted ellute s-%vinds up @as the skip .a,.part @Of- the %111,,tterial left,in,the pivoted chute -beyond, the, &ate is discharcred@'into @the skip to complete the load. @Experience@.shows-in-connectionl,-,vith.devices su6h@ ag @this@ @th-,tt a l@considerable lag or -@to.i dela'y niust@ be @F@i@o@@ided iisure; con-iplete fffling of@ thee @sk@,p. @ If the material is., @ dry "-an(I'@.fr.ee@@flowingi it. rushes in andt,fills the@ skip iwithout delay and@ under those - eikeuinc@uld s.@art u r) in- a Very,, fe,w seconds after it gets down. On. th(@,,other -hand we, @m@y @have . a mate'r,,ial w'.hich@ i@.,@.wpt orl@ tliere, may be@ a. 'bridge@ %or pArtial bridot er , r e in the,@hopper7o chut6 an(l@it-may require@@@qtiit an 2Lppreciable tiihe 'that the sl@ip for the sl@ip to fill. @I order ,:iiia,y@not be ca@ried up. partiauy 6mpt3T; it is coinmon. practice@ to;set the@ aiitomatic@ tiini,ii(y c6iitrollin(y meelianism so @as to provid6 foi-,,@ tl-te lon@rest necessaty delty to tal@e care I I @est-,@niost sl -gish, . flo,@ino, matethe @,gloAA 11, rial., ,This iiieansloyet a. days rtin-,tliat Nvliere iiost of @the tillies the:sli:ip@inikh t be loaded@in a seqoiid: or so, z there , ma-v be, a i,hilf @dozen 5o - load@ Avl-iere tlie,.y h,,ive t6 give@t@n, seconds and 2 goes -Lip so that . Figiires a d 9 sla ''Et fuj@tlie@ m 1 930 . Serial@. No. 422,736. in @6r@der@ to be safe it is necessarv, to have 6vei-y load t@tke@@ten -seconds@ 1,.ptopose:to provide, alitoiiiatic ineans to coiltr6l'thei loddli@p inooperati6nsuchthttthes][@ip,may@sta,rt, j tist as soon a@ it @is fillod. I propose t6 @@c-on-@@ 55 trol the alit6n-iatic loadino.-@ ti ing i-iieans; by the actual flow,or -,Dreseiiee f iiiaterial in tile I skip, or in the pi@,oted. ol te iianlediatel d.. a yc@ a@ i,@eent the I skip.-, -Aly inveiition is illustrated' mo-ro or. @le sg..to cl. iacfrgiuinatically ii-i @ tile @aed6inl)anyiiRg dra7m,inoS@ w' lierein@ zn Figurb@ 1 @is a@ diagramiii@tic side ele'vdtion sliowiTio- 'the skip empty. -Fio,ure . 2' is a similar view sho in(y@ il-le@165 W @l@cip fu'll and tbout.to start u p 'Fi(yiir63.is@tsin-iilar ol 2-1 view'showin tl-ie'slc@p a,,,@ after it h sta@t ed up - Fiaur6@4@'sh6ws a: inodified.'forin @iiith'the si@i@,7el@pty. Fi(yure 5 'shows :the device of Figure'- 4 with the,-Zkip full - Figures 6 and 7 sho'W a fu'rther.in6difi@ ed f-orm With theskip empt37 aiid @ull n ow odified form sl-ioiiing the skip empty alqd full. Like p,,tris aie indidat@d by lilze el-ia:r,,to'ters throughodf@ the,specificat]6@ @@d @di-@iivings. Rpfe,,rrin. to@ Fi(ytires. 1 2 and- 3 A--ig a vei@tica.. @to t@ack ine n Ligl@ it@ n -,ht b,-, I @ck t@@veis @, @@ m ol@en @@t ilie Alon- this tr a skip Al . I zn @tolj a bail A2 a ' hoist,iiig 6abl ',A3 @and wile Is li@5 e,ng4@,@in@ the ii@@k -k h ois, ing eiiof any-s'u'itabl@ typ@, is:6f c.o@i@s@ ii.@@d to oper@fe the,. sli:ip,:i@d it is,l@6@4@'d t6 soiiie,-85 ;P-Ie@v@t@4 po@iiioi, @ ,ijid then dun@-Ded and thpii @'returnecl. Bl@is ahopp@r h@,vinz @al'-fix'e@d'C,I'.Ilit@a Bl-los6d by - ai@ uiidereiit i@ate, ]@2 i@ A@so6iated with @h@l.iiind@,@eu,t ate is a. i)'i'@ote(I Clilit B3 tio - v@hi(,h whe i the, -)osi n, is@ in n n loadin g I alignmont I with tlie chtite@BI and@ disel-iaro-es into the o][)en iiiou,th of the skip. @Ti-le. tol3 of this chut@e is- o@eii but @baffle 1:)Iate B4 are SI i(rftilist @195 providedtocaiise nia;teri@,l tobtiulc UP t t, tlieiii %and p,reaent @i?illaLre, of , iitaterial @whe@ii material from@itl-ie ho@@eri flows @down 'the x IP fi ed and pivoted cliiites to fill tl-ie,, @sl@' @ and s bank tip@ in it and @in the chute @The skip, on@gages:,tlie piv d ehiitel,aii '@j@oo ot@e d as. it... starts 'A