Letters Patent is: 1. An elevator hoist havin , in combina9 65 iii(,, the safety 1,,tteli 48 iiito a I)osition iii tioli, a vertically extending shaft, a lift 130

12842,854 mounted within the shaft, means for operating the lift, and safety nieans for preventing the lift froi-n f alling upon failure of the 9pe.rating rneans, said safety means comprising a pivoted lever adapted to be engaged by the lift, and a pivoted lever adapted to engage a projection carried by the lift, the inembers being so constructed and arranged that movement imparted to either of the le10 vers results in n-iovement being imparted to the other. 2. An elevator hoist having@, in combination, a ve,rtically extending shaft, a lift mountect withi-n the shaft, a cable operable 15 to impart movement to the lift, a rocker arm located at the top of the shaft a,-nd provided with a lever arranged to extend laterally into the shaft for the purpose of being engaged by the lift to oscillate the rocker arm, a sec20 ond rocker arm located a, substantia-1 distance below thp, first arm and provided with a lever arranaed to extend laterally into the sha,ft rest@a-ini@gly to engage the lift, a connection extending between the t-wo rocker 25 arms ancl so arranged that movement of one of the members into a positioil extending laterally into the shaft causes retraction of the remaining member out of the shaft, and -t lever carried by the first named rocker arm 30 for imparting movement thereto. Sigiied at Virginia, Minnesota,, this 17th day of September, 1928. RICHARD J. WILLIAMS. 35 40 45 50 55 -o

Patented Jan. 26, 1932 11842@854 UNITED.STATES PAT@ENT OFFICE RICHARD T. WILLIAMS, OF VIRGINIA, MINNESOTA SAFETY LATCH-XINE SIKIP Application filed September 27,1928. Serial No. 308,679. This inventioti relates to safety appliances and is illustrated h6rein as embodied in a device for use in connection with elevator hoists to prevent fallina of the car, or lift, ti Lipon accidental severance of tb-e hoisting cable. In the operation of @various 6levator hoists, such, f6r example, as thos@, , employed iA mines, the colitrolling apparatiis miy for 10 some reason or other fail to operate properly with the result that the lift-or "skip" as they are comni-only termed in ihe min5irio,, ,qrt-does not' stop Nvhen it reaches the limit of its Lipward travel, but continu6s to be 15 pulleel vertically until it overtravels the g-Liides upon which it is mount6d, aiid, jams ao,a,inst the fi-ame @work of the shaft. Nott@ withstlanding the fact that-the skip ig i,n such ,It condition the hoistihg @pparatus liaay sti@ll '"'O continu'e to,operate, putting 1-nore and inore tension o-n the hoisting cabl6 until the latter tears apa@t and the skip drops downwardly int6 the mine sha-ft wrecking itself at the bottom, with a possibility of doing great dam25 age I and possibly causing lo@s 6f life. the part of the hoist i@ coiiamonly termed tn ,O'V,erwiiid, and it is an iii@portant object of the present invention t6 ,:)rovide an.improved de-@ice or iiiechani m for pr6yeritin& a @kip or hoist fr6iii falling',if the hoisti@'Lr. cable is parted by rea on of an 6verwind- It isfurther an object of the inveiitioii to,provide a de@vice of this charleter that'is siinple in 35 design and coiistructioii and relatively.iiiexs'-@lv-e to iua et 8tall. pen nuf a ur6 and to in A feature @of the invention whi6li leads to the acconaplishment of the recited objects consists in providing'a de-@ice that is norio mally stationary,-bfit is operable iipon cont,qct with the hoist 'u6 move inu6 a position in which it pre@ents the 1-ioist from@falling do'wnw,trdly ir, the sh,,tft. It is 'tlo be appre7 cia,t6cl, of course, that the most accurate m,,tnner in which the operation of the safety m6clianisn-i could be timed is b its engage- y ment with the hoist or skip Lnd accoidiiigiv, it, is proposed to rnount the s,,tfety mecha50 )@ism at the top of the shaft iinmediately adja cent to the limit of the Lipi7ard travel of the hoist in which conditi6n it remaiiis noro-ally inoperatilte and 6ut of the way, but -will, upon beinu eng@ged by the hoist, move into a position t@ prevein,t the latter from falling. Still another feature of the invention consists in coi,- istructing the safety device insuch a manne that when it has once oper,,tted to r prevent the skip froiii falling it n-iust be reset to rea me an operative T)osition bef ore 60 theskip@=bereleased. ThisfeatLireisextremely iiiiportant because no matte r - vtheth er the safety device occupies an operative or an erative ',]Losition at the outset 'it will, inOI3 in tille event that an overwind oelcurs, be 65 cal -ised to assiime an operative positioii in wh i-ch copdition it will prevent disastrous reslilt s thit ar- broucht tboLit by reason of tlle skip r"tlling an4 wreel6ng itself. Oth--r 6bjects anci fea'Lures of the ' v in eiiti.on TO will become apparent from a rea-diiig of the foIlowin(y specification in the li-ht f the 0 acc ompai-i-vii@g (Irawing in'whic@h 'there is sh owiri Itn elevator hoist suitable for mining 1- ise and equipped with a safety iiaech-,nisiii .75 As shown in the drtwing, the eleva!cor hoist cOiiii-)rises, -enerally speaking, a, pluralit y Of CO-TltaiDers 10, I 2, which are kno-,vi-i by such terms as skips, cars, b @te 80 ucke'us, lioists. e ., arranged for vertical movement, between gLliclewa-vsl4aiidl6,respectively. Asloping bin IS is arranged tc, re-,eive 'material frol'i'l the containers 10, 12 and is proitided witli a t,raclk: 20, riinii.ing beneath the bin, ifi order 8.5 that dump cars 22 inay be, rolled into a position beneath tlie outlet of the biii to receive i-,i@Lterials thorefron-i. The sIK@i-ps 10 @,ind 12 are providlld u Pon Opp osite sihes with outwardlv projectin,g I-Ligs 24, W.Ilich are ar- 90 riiiged to ride in grooves formed ir. the (Yuideways 14,16, up-til the point 26 is reached, whel--euDoi-i thev nlove inwardly tlirough f'Lie giiidew,,,.vs 28, cai-,sing the top of ti-@e bucl@:et to swing doivnwardly as tl-ie bottom of the bucli:et is rai-sed. It is duriiig such nioveiiied-t, of course, that the dumping operatiopbetweeii@the btiel-,et aiid the bin takes p.lace. The mechanisni for hoi.stiiig the sl3:ips 10 aiid 12,,comprises as ill-LStrated a hoistin 9 This undesirable inanner of operation on :of the iinproved character.

2 1,842,854 apparat,tis 30 that is provided with means norin,,tllv adapted to preveiit overnvijicling of hoisti n- cables 32 which lead over sheaves 34- and coi-iiiect, by nicaiis of clevises, ii,ith tl-ie upper cross b,,tr of rectan-i-ilar baiis 36. vNIiicii cai-ry the skips 10 aiid 12. Froni tii iiispectioii of the dr,@wincr, it -will be, seen that if the apparatus siiould contiii-Lie to hoist ,ifter tl-ie sl@@ip has reachecl the 10 Iiinit of its tip-Ni,,,trd travel, theii the clevis iii the loop eiid would biiicl ul)oii an(I tend to moi,e iiPNN,ardly in the (,,i@oove of the sbeave 34- uiitil the tension brought aboiit by t]-ic bail 36- jaiiiii-iiiig on tlie, otiideways 16, would 15 overcoiiie the teiisioii appliecl to the hoistiiig appar.-,tiis 30, Nvhereiipon the boisting cable would sever and t'he bail 36 ai-id coiitaiiier 12 would crash doivnwardly to the bottoiii of the shaft -where it iiould -wreeli: itself and, ill 20 -reat likelibood, cause co3isider,,lble Ii-i order to prevei-it tl-te slcip from @.all-iiiin the event that ai-i overwii-ici t,,ili:es I)la(,e, there is providecl a sa.'Le4,-y clevice or i-iie(-Iianism which is arraiige(I for movemeiit I)e25 tweeil an inopei,atilte out of tl-ie way position, alicl an operative sl@ip eiigagin@,r posi. tioii As sliown in the dra-Nviiig, ,t rotattl)l(-, shaft 40 is illoiiiite(I at the top of the sliaf4-iv,,,ty or sl@ip-way aii(I is provicled i-,,ith c-i plii30 ralltv of tirms 42 -%vbich exteiicl outivlll-@@dl-v iii a positicri 'Lo overlie the pa'Llh of iiiov(@n-ient of the sl@ips 10 ancl 1- 9, ii,h(-i,ebv thc@ out-wardly exteii-dilicr arms ai,e ciigag(-(l I)v the sl,:ips'if the latte'r exceecl their 35 Iii-nits of uj)iv-,ird travel, and catise rot@qtioll of the shaft 40. lp-te@,vi-al arlias 44 exterid rear,wardly from the opposite eiids cf the ift 40 ,tiid pivot-,Llly coiinect with Iiiilc coiiSI], nectiiio- i-ods 46 -",hie]-i, at their IoNv@er ex40 treiiiities I)ivotally colinected to safety latel-I meml)ers 48. A supplemental inte,,)-i-,,il ari-i V)O extends centrallv frojii the s]-i@ift 40 and is coiinectecl to ,L pl@lj,,tlitv of Iiiil.:s 52, which ire p votally coni-iectecl w' h uii -iiformly oi) iteriting safety latel-i ineml)ers 54, it bei.iig observed th,,it both of the safety latches 48 qnd the latches 54 are piltotallv ii-iountecl. ,tt oi)c e.Ntreii-iitv iipoii th6 frame -",o-,ck of the elevator sh@@ft. 50 In discussiii@y tli.,- oper,,itioii of the safet@T device shown in the dr,@-wliii(,,, it is reqiies'lled that the rpader -fi-est turii his attentiol-@ t,) t'lle sl@-ip 10, iv]-iieh is sho-\vii iii a 14Diver positioll thaii the skip 12, -,iid i)lcture the travel of. 55 the, skii) 10 as it moves Lipii,.ardII7 in tl-ie shaf twav. The arm 49, extenclij-ig f@olil the shafl' 40 tile ii,,)-rer ineiiiber of the bail 36, -Nvhich carries the sIK:ip 10 and if the hoi@-till,(,@ apparatus does iiot oper,,tte to stop the ul)6( wird movement o'L the bail upon the stip 10 moving iiito a duliipin- position, tlc7! b-iil el will en-age the overivin- lever 42 ,tn(I iiiove it upwarclly, thereby rotatiii(@- the shaft, tlirtistiii u the lever 46 do Nviiwirdly, and movwhich it underlies the bail 36, ii-i @,he i-nallner shoivn in the dra%ving in conliectioil with the skip 12, whereby it is impossible for the slcip to fall in the event that the cable severs. -ice been 70 When the s,-tfety apparatus h,-ts oi operated aiid the 1,,ttch 48 is underlyiii- the bail of the skip, ,t lever 60 extendin- froiii the opposite ends of the shaft 40 in clirections opposite to the levers 44 1-nay be ol)ei,,ited iiiaiiually to move.the safety lateli ijito aii 75 iiioj?erative positioil in whicl@ the sl6p is free to deseeiad. it is to be note(I in this coiineetion that such worcls as slcip, lioist, car, etc., are intended to iiicliide both the I)ail and ti-to container i-nounted withill the bail and not 80 iiierely the container Ilone, From so iiiuch of the description as appears above, it will be tincierstood tl-itt normally the safeti, latch members 48 occupy an otit of the -way position which i-neans, of 86 course, that the contact meii-ibers 42 will occupy ,i I)ositioi-i in which they oi,erlie the sl@ip-ways, ivhei-eby the si@ips 10'and 12, strilciiig the members 42, will c@tuse the latch il-iembers to be inovecl outwardly into enga(Tement 1,10 -w@ith the sli:ips. An iinportaiit co,.isideration resides in the f act that if by chance the safety latch members 48 shoiild be dispose(I iii -,in outward, operative position while tl-io skips are beneath them, they Avill, upon beinen- 0,3 gaged by the upper ed-e of the sl@ips, be snvung into an inoperative position and the contacting levers 42 will accordin(fly bG, moved into t-n operative position, the result of this being that the safety latch is bouncl loo to operate at all tiines, for if it occupies an @tnopteorativoe position, the skip itself moves I in in perative position before the limit of upwarcl moiement of the skip has beeii reached and thereafter the safety latch is 105 properly set for operation. It is also to be observed that when the latch is moved from an op erative position suc'h as that shoivn in the drawin(y to an inoperative position in which it Nvill be disposed outof th(@ path of 110 the skip, the contacting arms 42 must perforce be moved downwardly into a. position to overlie the sl,,ip-ways. Thus, in releasina the skip's, the sa ety devices are, simultane'- otisly reset, for a subsequent operation. 115 VO-iile the invention has been discussed her.ein, -with I)aTticiilar reference to ii'lininff hoists, it is to- be iinderstood that it may Lised in connection with elevators and hoists of practi.cally every li:ind and des cription, 120 ,ind it is likewise to be understood that the iiivention coiitempl,,ites the incorporttion therein of modifications and changes such as will from time to time appear to those skilled in the art. 125 Having tlius described m invention, -what y I claim as new alid desire to secure by United States