4 1,702,798 iiactliod ,,,iid mech,,inisiii wliereby in olle siiio-le doAi@nii,,,ird strol,:o of- the t,,iiiiper, three clistiiic'uiiiipacts ,,i.e in,,icle bn the sai,@-ie ,irea of in,,iteri,il, iiaiiiely, the concrete. Tt A-vill'be cle,-r tli@,it the spi-iiigs 26, iiiitially the don-vnwiid tlirtist to the iaeialit btit tftei- 4@lie ci@oss head strilies the t,,,liiper, t lien, tlio f,-til of the i-v,,io-lit 85 iiito c,iigageii-ic@iit ivit'@i .@Tiot@.Idel@ 32, is by o,i-a,17ity. Of cot!l.se this @),,.,avity iiiove,@i:ieiit of the iceelt@i-ated by the i)ioAve-iglit, is ,111(1,11,Llllll iiiipai.to(I to the inei,ht by 13y i,easoii o',@ l,'Ii(@ dii'lerence iii the lost ii-iotioii connect;loii be4.-v@-een 'Llie, cross liead a,.icl tj,.-@ ttaiiiiip)er. )ii tlio oiie Iiiii.-icl, apcl the eiiec in space(-l of the ii,eiglit, 35 Nvitli i-osl-)ec't to the slioiildoi39., oii the otl-ier li,,ind I cin cai-ry otl4 tlle (jelliee Of 1-fl3T ij _lventioll i with the operatiop. tive of the the tainpcr 30, LTicl, iieicyl)t 35. It ivill. be ii-ndci-stoo(I t-liat-. A-vliile I liive llse,(l tlle "coi-ici,et-," tlirougliotit the si)ecificttlioii iiid cl@iiiiis, tl),I,L- tlils toi-i-ii l@9 iised @@encricallv Ic-o covei- lilie ()i- siiilllii- cojiipo,,,itions, stieli @i@or iiistaiiec, is lli,,Io,iiesitel sanv-dust incl elliclei-S, ivb.cii.-e a stii-tibic I)i-pder is inlic@i-ei-itly oi.- @liclditionallIT pi.-osejit. Tt is believc,,d tli@).t the :@nvention iN@, i I I be i@l uiiOci-,-,t-oo(I fr iii the fore(,Y,oiiiii, cle-. "I )T 0 E,CL,iption. aiicl while I liave lierei-.i sli-oivii oiie specific foriii of iily invel'itior@, I do not A-,@isli -'.o be, Iiiiiited tliei@eto except for stieb @5 limita'u-ioiis ,s the claiiiis iinport. cl,(tim: i. III I coiicrete taiiii)iiig iiiael-iin.e,lql 1'rai-yio h,-vj.p,g a shc,,If adal)tecl to -,til?l)ort ,L inolcil ,t hoi@izont, sposecl ei- ss b, tlly cli 2ad floatiiigiy 0 s]iO,,-,ble verticilly iD sticl fi-aine tonvarcl a,-i(i fi-oiii sal.d i-iiold, a i7ei-tically disl,)ose(i a rediicecl sli,,iD-k pr@vidinp, an ilill)act st)oiilder ancl sai(I shaiil@ liaviiig 16stmot;oi-i slotte(,l coniiection ivitli sqicl ei-oss 4 li(,acl, PI tamper iinpact i,.,ei(Yht slid,,tble on L@ said slianl@ l@e,'LWeen s@iid slio@ilcler -@iid er6ss lie@,icl, retaiiiii-io- btrs rockin-ly mounted i.n aii.cl, iiorin,,tlly siippoi-ting saici jallt O@(1-VTIIA7' '(I Illoyeiiieiit ancl actW(@ 11 li t-lil-oiIL,@ll said iveigbt to I.iiiiit d ivnw,,ii-cl 0 ill()AT(l@IIIC'nt Of S,ti(i CL,@OSS Ileicl ,tiid taii-ii)er@ power ,,I,,,oe,3 slidable vertic,,tlly in s,l I cl ancl, liiviio- tipper cross I)ead act1,@ i i, o- 1) foi, -,)ogitively elev,,,tin!x.s,,lid -or aii,cl Avei.gl)t, spi@in" coiis'l,"(Cll@ witli gaicl cross hea(l f6r cl,own,,vi,-,@,cl lylovel-liel-it to L-lic latt(l-k', -,n(i canig oii s,,ii(I slioos T-oisaicl a-i'ter initial iiiove1,)Itj-s to rele@@se @,ai(I o F. sii(I ',,,is 'L-e-Tisioiied said gprin(-,,s, tilr"])el. l@rill, @Cil.@st strik,,@ COD,- el,ete a@d s,,ii(I ci@o's", illilj nc,,xc strike sii(i fiimp,@r@ and fiii,,tlly sai(@L ,@eiglit ivill stril@e s,,@i(i Ci5 i frame ,?. In ,t coiierete taml)ijig n-lachile, qpl.illgs -96. disclosed, ii@i-espeeiii ineiglit as b(-,tivee,-.i litviiig ,t sliel'L for stippoi@Ciiig ,t iilolcl, t cross head floatino,-I,y slidab,le in said fr@ime, a L,aiiipei@ tn iinpact shoulder ancl.liavlost inotioi-i co,.-ineclu-iol-i @vith siid cross ill-@icl, a taiiiper iiiipict weio-lit foi- eTif),age- 70 iiient %iitli s,,ii(l. sli.o7Lilder retainiilg iilei-nbei-s iiorn-ially Aieight i ainst 9 n IdoivnA-vtir(I iiioi,,,iiient ,.iicl Itcti g th ough s,,iid weight to aj!rost downANPU,-l iiaoveiiaeiit OT -aicl cross llc,@Ici power shoes slicl4ble 75 iii said fi@,iiiie an(I pogitivc,,IY eiio-a@-Ti,.ig s@,tid c@,@oss liead t,)@elevite tile latte,@, spilin(,s coi-.iectiiig sai-,l sli,)es witi-i@s,,iid cross het7Ld to iiripai-t ouick doivnii,,illcl i):iove,.iie-,it to the latter, incl ciiiis oil said sho2s for aettiating 80 -vei si;cl, iiieiiibers 'uo release spid i ),ht a,fter initial 1--Qoveiiient,of said shoes lilis teiisionecl sc-,ici tliei-eb-NT 1-.aoVeii-ieii'L. of .1 stibse saicl tallll)ei@ ,,gaii-ist the coi)-crete ,tiid i-nentof -,,,i,icleroshe, -id Ni, ',-lit 85 quent lilo v 0 c id @i i ell to-aii)st said i,e,,-r@ectiN,elv. 3. In a coiicrete 'Lampiilg mllchi_ne a mold, ,t taiiaper tlierefor spriiao@ II-le"tns impelling s,,tid-t@tiiiper aii(I ii'leans for tctt@ i'np i.n- oil s@qid tamper aft@-r. the 1,,ttter h-.is en- 90 (,,,,gecl 'lie ]I!olcl contents. 4. In I conei-ete tiiiiping machine, t n-iold, @t . t@,impoi'uherefor ii-ieans inipelliiig said Laiiipev ,tiicl- illeans imp,,tetiiig on said tamper after tho 1,,ttter has eng@i,ged -the inold con- 95 l@ents. 5. In a cotcrete tainpin(y. n-iicliine, It molcl a taml)er tl-i,reior, aiid rfieeb,,tnism imparting@ successive tampino' coiieussions: @to said tamper in one tampiiig stroli:e of the latter. 100 6. In t coneret,e ta,iiiping iiiachine, ,t i-itold,@ -t t,tmper therefor,@ a normally supporte@t iveight associated Niith saicl tamper, @ancl n mech,,t ism applyin g si@riii(, t,,),mpinopropulsion to said tamper itiicl releasing sala w.-i(ylit 105 for inipact against s,,tid tamper -,tfter-,the 1,,ttter has eng,,tged the contents of s,,ticl mold. 7. In ,t concrete tamping,, inachine, ,t i-nold a taiiiper therefor, a w6ight associated@@witb', said tamper, ii'leans for vrresting tampina 1.10 rnove_ynep-t of,said iveight and,tamper -@nd niti, mech,,tiiism h,,tviiig an i 'II nlovemen for impo ino@ tamping stress c,-n s@tid tariiper tiad s a conel-Lie@.linu iiioveinen,t for actu@ti@g s,,ticl I n means to refease s,.tid weight tnd ttmper t 115 o first e-naage sq@icl t,,Ii--,iper with the mold contonts and subseqliently poi-iiiit said weiglit to ir.,ipact on s,,iid tamper. S. In a concrete t,,imi-)ing inecbanism, a a flo,,ttihg cros.9 frai-iie supporting a Tnold,, 120 head slidable in saici a:rai-n-, a tamper havin(y lost motion connection@Nvith said cross he,,Icl, actuating sh es havinp, ,i fixe,-l cycl,., oT- inovement in s, tme -Lb "id fr. ind proiided vvith utments foi- 6levating saicl cross 'hedd, an.(]. 125 springs connected with said sboes tnd cross head for c,,i-Li,-,iiig initiil ongap,,ement of said 'tamper, with the mold cot-iteits a-nd stibseqlient. eng,,tgoment of S,,tid t@tinper by saicl cross head. 130,

i,102,798 9. In a concrete tamping mochanism, 11 frame, a molcl thereon, a flbatin cross head 9 slidable in said frame, a tamper having lost motion conhection with said cross head for .5 tamping conei.ete in said mold of inereasilig depths and means yieldino-ly connected with s,iid cross head for imp,,irtiinu tamping movement to said tamper. 10. In a concrete taiiiping machine, a 10 fr,,tine, a mold thereon, a ei-oss liead slidable in said frame, a tftinlier iost motion conliection with sai& ei.-oss head, means for resisting tampiiig i-novement of said tamper, and mechanis m yieldin(-Ylv connected with 15 said cross head for aettia@@n"(, said tampe@ and releasii-ig said iiieains. II. The herein-deser-._becl method of tamping concrete, which consists, in imparting; an jmpact thereon and in subsequently impos20 Ing a series of concussive blows on the same impact I ed area of cojacrete in one tamping stroke. 12. In a concrete tampitig inachine, a frame, a mold thereon, a cross head slidable ill said frame, @ weight subjacent and close to 25 the bottom of said cross liead a tamper body subjacent said weight ftnd having a wei-ht impact shoulder in spaced relation belroiv said weight, said b6dy ht.vinc, a shank in lost motioii,connection with sai(17cross head of a 30 reduced extent witli respect to the extent ofspaced relation between said, wei(yht and ul and means for a, sho der, etuating s@id cross head downvvardly to first engfioe said tainpeiwith the concrete and thereby take iip the 35 0 n lost motion between said @ er ss head a d tamper and calise the former to strike tlit) latter and said weight subsequently engag-. Ing said shoulder, tliereby insuring a triple ttmping impict in one tamping stroke. 40 In witness whereof I hereunto affix my signature. EDWARD J. SCHUH.

1 , 7 0 2 7 9 9 Patented Feb. 19, 1929. UN,I@TED@ STATES PATENT 0,FFICE@., EDWAILD J. SCHUH, OF SPOKAIQE, 'WASMNGTON. CONCRETE-TAXrING XACHINE AND XETHOD. Application filed November 7 1927. @Serial No. 231,M. The object of this invention is to provide an parts in a position siiiiilar to that shown @in inil)roved metliod and 1-nechaiaism for tamping concrete and sin-iiiar compositions @nd the @all inyention is espec@ y adapted for the nianu-a fa-ettire,of bri@ks, blocks and like useful arti-@ c-les M,,ide tlieref rom. One feature,of the invention consists in imp,,irtin,or to a:cyiven,,i iof co-iierete a succesreA Sion oft,,tiiiping iiiidacts in rapid followin 9 relatioii, ane upon tlie@ other so that the niaterial acted upo-ii -VNill @n-ot oiily be more dense but -also more uniforin. In thi@ oonnection where a, old is - in -em ployed, it is a feature of the invention to use 15 a,taiiij),er of ivditeed cross section with respect to the intei@ior of the mold slo that iilider tl,ie a,ction o . f quick sliceessikte tai-nping, the iiiaterial mill be not oiily r6duced to.,a maxiiiii@iiii and uniforn'l. density iinmediatelv un(leithe tamper but t]@e latt@r -%,vili drive the excess materi,,il latbrally s6.tliat various forms of @intei-ior confi(rura@ion of molds can b . e uni7 forn'lly fill6d. in a i-iiore spei@,ific phise of my i.nvention, i-i k@Illploy ,t tamper -",itti a means c@acting thereivith io obt in in o c single stroke - the a n of taiiipei-, a plurality of tamping impa@ts, a-nd I)referably, one iinl@act. is obli,ined thrqugh one ebara6ter of a-ency and @other. imwts 30 t;liroii(yh another el@'arae'ti@r Al@.ini,entioii involves an actu@iling,r@6a@s tl-i@it operttes tbrougl-t -a fixc@(I and predet,@rinined e-vele, in comdination with @a float-i-n,r cross lip-ad and a floating tamlier, and@gra@v@@@it; 35 ineans. Otlier .eat-Lires:and objects of the invention ,,@vill be iuore ful][y des@tibed in connection ii,itli the ac@omp@inying diawings aild ivill 1) arfy e lli<)rc p@,irt-ici@lpointed out in and b-y 4 0 the appended claiins. in In tfle draw' 9s; 1, is a vieni, i my, iinn clev,.tti on,o f, pro-v,,@,d taiii,i)ino- ii-Aechanism@. Fi@(,,. 2 is an (-,e@ e e-vation the 1; ed,, reo f with the I)arts iii an elevat-u-d ot, startin,, p<)i@ition. -rq ig. 3 Is I Silili a I r@vi@w showin; the posiprior to teiisioii of @he springs. Fig. 4 is a si@niilar view slio@ving a ftilrther mov itieiit after tli e sprinos liave been t - ell 5 i@ a final I)OSitioll aft:el,. the tatill)@r has reaclie@l th<@ mold. Fi,,Ol 6,, is t velti,-I, @ectioit-@il v i 'IV (,)ri 1; ne "5 6 of Fig. 1 look ng i to the left,,sh*ivitig th,e Fig. 3. I Fig- 7, is a view similar to Fig. 6, showing the parts in a po@ition simil.ar to Fig. 5. Like,characters of reference desigilate@rimi- go lar parts throuoliout the different figlitesof tb!e drawirL@c,,s. As the device C)f my inientilon includ es a frame havin, similgr side members l@ connected at. their u@per end7s:at 2 and bav- 65 ing a sulitable supportinff base 3. The frame is @@wn provided Nvithany suitablecharteter of molli s@@oortin- helf 4 upon which,& n s mold 5, is. shov@,n. ;I have not detailed Rny ineq ns fo.r.centei@ing the@ mold in @a predeter- 70 mine d i,posi.tioii on the -,he4f as my i,nvention ooe not i)ert,,tin to' such fesitures and further, such @details are -,%vithii, the skill and common lcnowledcve f this art.@ 0 Re ference will first be @iade t o my im- 75, prov .ed a,etua@ting mean.S Which operatos @hr ough a fii@ed I and -Predetermiiied - cycle,o.f iuov en-lent. @ .4@ 'table - power - shaft 6, is journalled in slui bearings 7, in fra rne -inembers 1 and on -one 80: end of said shaf t is @ cranlc 8 e-onnee,ted witb a link 9. On @theremaining end is,,a crank 10; connected with a link 11, the crank@10 having a emnk@.ha dl,e l@, suitable for the ap n Plicf L. t@ n of @-ianiial.power althougl-t mechanical 8.5 r may be of coiirse applie powe d. The links 9 and 11 are connected at theii, upper I '&'nds with wbat I will call actuating -,hoes, both of, Wiliol-I are alike in structtir-e and function and only one of wliich iieed be described in (ietilil, 9 0 the same reference letters being applied to, botb. The 'fraiii@ mei-nbers @l are each provided I 'v @a y in ih6 for -rn of ,t slot 13 w with a slide-. hieb miy be of 'a single,':Nvidth throu4ihout its -ie t,6p to the bo The lieight from tl ttom 15. sh oc comprises q L slian.k 16 extendin- through the@slot ancl a relativeli, sliort guide 17, on tlie@ ilaside -of mem.bei- I and a relatively I!ang giiide IS, 'OT1 I the@ outside f member 1, where100 0 @y the sl).(w is he@ Id to a fixecl -D,,tth of reciprogitibn@@of th@ otiter gtiide @18-, is 1)@rtly to afford adequate bearing surface and@.pa'rtl.Y to form an act ati g nd u n c and abutimnt for t cro,-,s head whicli ill be pres- 105 w entlv described. Projecting from the oxte@ rior @of the slLoe is a link bc,@s 19, to which @ the r,,espectiv6 link-, 9 ind 10 are piv6t-ed in jord6i. to ::imo,irf - reciprocatilri( r movenienf to. the @a esult of r ati @ of @tlie ra shoes s@a r ot@ on, n 110 'Uioii of the liai,ts@in that inti:,,tl Mo@vei-af@iit itist, cation. The elon

power shaft 6. Said boss 19 has a redticed shanIK 20 wllich iiia.), be pi@oa,ided Nvith a niit 21 for aii opoi-Ittive coiineelion witli tlle cross head next to be described. 5 I will next desci-ibe the cross head that 's operated by the heretofore describecl tctu@iting means. M cross licacl is c[csi(-iiate(i tt, @91 aiid iiitiy y zn be as slioia,yi oil@ iiiiifoi-iii ci@oss sectioii ,tiid 7 lo. of a leiigi,it stifiic.iejit, to sl.)aii [lie f t-tiiiie inciiibers I pioiect'@lict-etliroti,,,,Ii ivith the elids 22 exteiicliii@); beyoiid s,,tid iiieiilbers I as shown. Sai@i ci@oss lieicl may be provicl.ecl Avit,li ipsido flalio-es 23, adtpted to slide ,ilong the inside 'Ltees ol meiiibers 1, to hold f,he cross heid a(,,,,tinst leio-thwise iiiovement 'Lhei'ein aiid in v, lioi-].zoii@Lal position. The e,nds 22 are QhoA,-)-, 1)rovidecl Avith sttids 24, I having nuts -95. Said cross lie,,id is operitil7ely coiiiiected witli the tcttiating mepiis, pref@rabll7yiel.dinglv, by si,,)rli,.gs 26, tho saine being tensioi-i their end,s 27 @ 8, r ely@" d @,v"- st clg 20 d espectiv coni-tocte juh u aiid 24, ,is s'lioy@,n. Thc, ci@oss lieac-t 21 is ,tctuqlly floatin@1.1,)r mouille(l. in the ill tbv@ ,@ense that ic oi" iiiovejiioiit of@ 1,1 IT,Iriabl6 ii,,ttrtre Avitli resp,@ct to the iii6)rcmelit o-f tl-ie actiiatiiio; means to which it i-, operatively connected@ 7,@Then ir. the -- tartino- posi30 tion sboivii in Fio,. 1, tlio C,.,oss lieacl rests upon the abutiiients 29, ,ire 'Lorillecl by the I.IpPer ends o'L (,Tuides 18. In this positioll, the p,,trts are so Itri-ano'ed and propoi,tioiiecl tb,,tt the sp,--ii-io-@9 26, aie riot, udder tension but z .45 they Zhe iiseful ftipetion of i-nsui-ing desceiit of the ci@os-, lieacl initli t,he actiiating mca,ns li,-@i t-lie eA7ei-it that fricti.on or ol,,Iler imperfections of- tli-@ parts tencleci to retard (yr"llitv clescent of- t'he cross li ad. Thits e 4.0 ivhile the sp,-in@g's 26 ar(,, i-iot uiiclei- any ten Si()n, pi-6- fei@ably, iii 'Lhe Fi- 1,, posit-,ioD, they do foi-in,,,tconpec"- itlg:iiio,,iiis functioningpositively. I-Iow,eA,ei-I the iii@icliin@ is iii -,O@Od orcl(,,,.- @tiid pi,op-rl inide, the y @45 impoiitance 6f this of the sprin(ys 26, -y wotild be@ of a sceoii,,Iai ttiire. Refer 11 m,,i,de to m ence wi ii-iper ,ii lie!-, it is proved ta -icl ti)(, m,,illier in iil meeliai'lically assoe'l-,Itcd ivitli, tlio cross lie,,td. 50 Nly iniproved tIMI)(',P consists, ,is ,@liolvn5 of 11, rel-@LtiACly hcl@ivy'l)odi, poiti.on 30, li'llicl-I will preferably @o iiitcle o't' iiietal tiicl -viill be 0-f S-LIffiCiel-,It Wei,0-11L tO qe(,Ii: b.1, (lyra-v @y an.y positioli @l,liicli "t is lrr(,e to ,isslii-ne. The 55 eross sectioli of- the ti@inper bod,), 30, will be clesio'ned I)rol)oi-tlionecl in .tccordince wit-li the size molcl ei-iiploye,,I. fil the di-aA;vI-Ttgs, I have showj-,i to be of a cross section less t@ian 'u1-ie intei-ior of tl-ic inold 5, 60 to effor(I clearaiiee ill ai-otiii.d of ,t gi-ea'UCI' extei-it tl-iaii t i-iiei-e S,-,icl t,,tmper,bocly 30, i,,,, recliico,-l to a 3banl@ 31, the i,edtictiop,- forniiii.,(,, AAIiat I ivill@tei-m an impact sho,,ilde-i- 32. Tor ,i tisel'til piiri)6se tllat @vill presently be 4oseribecl. T@e sh-,@ini@ 2 1,702,798 31, is provided ivitli slot 33, iihich is sli.da ibly issociited ii-itli @t C.(Iiitrall.v reduced portioii 34, of the cross head 21, as s l i o i , This -,lot 33 lojigth crren,tc,,2 tliaii the iiiijor el.@oss secl,,I(,ii 0-!' 'I@ie ei,oss liead affoi@ds 70 tle taitip(,-@.- .901ile i,o I j.,iL,ive iiiov,(,iiieTi t iilde I P-jlclent of@t,,h-, ci.- o,,,,S ile,@icl ivllie@ebv -,t wi-11 be seeii -@lic is coiiilect-Icl - Avitli th(,, cros II(-, s , ,, (I A @l,,irtli6r for t I i (,, I e ii,@, t h o f, t li c s 1,) t i! i 1 1 b 1- I (,i t o 1c s i b e Cl. Oiio of the fol. c.)bt@-,iiiing ,t pltivalit a sii-i(-l @y ol colict,,,Ssiv,@-, iil:ip@ie'ts , e cl. t@iijipein c @ @ ' t b e ( ' ! c , , s c r i i e A is i. @ ,' I d i c a :t c c l a t 3 0 - ,i - @ ,- c l L I @ i c li tt ,, @ r e is associatecl i@tli the t,,tlii, i)ci, by bei-Ti slo't 0, 9 as showii a'(" '06, for j)r@iectio-Ti tliei-,--: throligh of the shiiiii, 31. Fu.ile(iolltII3,-, tlle @issociatioii of @Uh-, Avei,.o,,ht. rel@Lte@- iiioi-e to t,lie T',i C'Ltjiat.:tli. 35 colets ivitli t'lle i-iiipae,'Ll slioti'- cler@I'D2, of tlie tamper. The lareio'lit 35 is sociatecl iaitli the ,iicL iiieill@@ll 1-11@ PIIO@. videcl fol-, stipliort'i,jio,, i@lie ind rosti,letillo- its actioii ()ii tlic@ to .1 p iiiiiied pet@io,'i 6T.' @i@Iiicli I -,vill ilo,@t cl("";Cribc@. Bai-,q 37, @ii-c@ (P@ po@site ciids iii -1"raiiie iiicjiabei-s I aiicl irc,, sli(,,wn stipported oii tleir edc,;es 38, opeiiiiio,s 39 i,.Listlicl i'-L'a-lfie@ The sli,,i o i - the openiiil.s is el.eariy sho)iii i"l @iilcl IU-Iie walls of tlle7opeiiii'iO'S to Iiiiiii, "oeking iiioA7eiiiei,,t o---' the b,,r:@ AycAtg,,Iit I'@- "Ippoi-,,iilo,.to Wei-glit n )@ I 10 vice versa. Mc-aiis_st..Cli -,@ts 40, posed be'uvvoen tlic e,-td.,@ o'i 'Ltic, I)ai-,, stii'Lable ibutments 411, @kiol@iiia'il.y siicl ]-)ai,s 37, into a Th e u pper edues 42, o-l' E,@iicl b.,i,-,.,s- serve for Clii.@ect. engageiiient- the I)OI"Cioils of 105 35, a iiill be i.Ti G. s y s I Lo T Wlfil 'K)acl.@ to ific" aiid ' I t Fi(,- 2 IAhoieii it i-@ill be seen 'iiit I iicle,(! thc@ oti't-'siCle gUi(ICS 18, C,,Il S A3 As the slioes clesco,-icl 'cliose caii,.@,i 43, kyecl,(,Ye the 110 upper edges o 4 ' t l i e . b a r s 3 ' 6 u t i-@,ill be seen iii 4, to release -Llie -weio-lit 3;j 0 AV' [ l i e 4 3 @ I i i @ l a s c e - n l u - o f i l i e s l i o e s , i@eadilv piss 3-,., bv l'o,.@ciii(,, t-li,eiii @p@,,i@t, tl-ie a,,iin resto,@-0 theiii iiito L p,-)s,.@.-ioia to:@- "il,:)po.-c @Ul@e -woio-lit . iiill next deqcl@ibe k)pe@,,itio-il of- tile, (Ic@vice aiid tl-.ic i,- iethod 0-f- iiiy iriveni@.ioli. 1 2 0 in tl-ie -@tartinQ- positi6n 'shown in Fil-. 11 tlie Iiiaks 9 alici 11, sul)l,,oi-t t.@e P'lloes in 1.1i'l LI liern-iost 1:)ositiol'i f,- nd 'ilie abutillerits 29 p 9 supl?o--ct tl-.e cross heci.d 21, iii ,iii @ iil,)pei-iiiost positi-on. The, Av(,igb4u of tlie ttiiij@01- IIA'ill 1101-ID,'I@IIV ClitTS(, t',-10 lttter tf) ,is,,@ume the 1)091- t-ion 1).IT ij@, "LDIT event tli,, iveiglit 35 woilla lij-11i.l. e)llell", of ti-ie tgl--t-pei, be-vo-icl I Thb A-vei(Tht C')r), is tlic, 'L, 1)(-,sitioi-i. by tl,@e btrs 37@ As shbNV-Tl in Fig. 67 oilly i

i,702,708 sni@tll aitiouiit Of coderete@ is disp-L)SC(i in @tile iiiold 5, and concrete will be. oq-adually fed iiito tlle Inold to an inereasino,, depth uniil tlie- iiiold i.s sliglitly. oyerfdled- I hi.-re not shown ti f eedin(r nieai@s as the latter is iiot a pai-t of this inaention.. Rom,-ever, in iny P@itciit @No. 1,581,814, issited A@iil 20, 1926, cii@ tit,led Machine @for n-ialdng concrete pr(xiucts, there is shown and described a f-cedin(r rneans -%T-,tiita(reotisl tll,4t -,Votll(l be -td y adatted foi1-ise i.n con-nection with niy -eseint tanipin(If, Pi d,e-vice. In tl-iis patent, the tamper is slyialler:@ iii cross section flian the interior@of the ni6l(l so that tlie ii-itid is tainped inot only downwcirdly but also laterall Y. The initial donvnward inoveittent frolii the 'ti n sho-%vn in Figs. I aift-d 2, is illi-istrated posi 0 tis beiii- pai-tly ecimplefkl in Fi,-s. 3 and 6, in the foriiier of Nvbich the cross li",d 21 20 iS 8till Up s ported by @the abiitiiients 29, an(i in the latterof which the cross head bas advaiie4ed intc, cnga- ment with the weight 35. go' After tbe, cross hena 21 ))as engac,,vd the weigbt 35, f urtlier nio-vement of the cross hellid 25 is t,eml)or,,tril-v tri'PSted and as the shoes furtlier descend, the spi-ings 26 Nvill be teD7 0 ,,ioned, as sh wn in Fig. 4. Iii this lattel- 1)0sifioni the slioes bave deseencied sufficiently ftirther t@o te'nsion t,lie sprinclys 26@ and the c,,ims ar@ itist abolit in -,t, posii@on t4oacttiate the s 3'@. Af ter the calils 43, liave act,uated the bl'irs 3T, tile -,vei(,@ht M, will be released aiid j tist a,s soon ,is' weight@ 35 is released tbein the s riin.gs instaiit,ly contract. tbereby impartp in- a veil-@suclden and pwonverftil downward '71 iiiipulse to the @cross head 21.: The cross head 21" @will follo-,i@ the wei-aht 35 and remain @ in ell 3-eiiient tla6rewit-h beelciuse the rat g ti e 6f speed of deseeint of the cross head 21, under 40 the @ction of the ecintracting springs 26, will be'suffic;ent to catise the er6ss head to maint,till the saiiie @re,].ition witb respect to tbe@ Of@ -v@-el (,@ht 35 for a Iiiiiited; e--xtent of travel cotirse, the tam er %vill also descend witli tlle p 4 cross head @and weight. At this point I desir@, to draw atteintion to a vei@y iii-ipoit@nf feature wb.ich ciiii roidily be N6w it will be clear that even tIloll,,,Ii the initial impuhe of the cross is i,.iiparted fo@tlie weiglit 35,@:before it is impirted to the t,ai-npei-,, and elell if,tbe Weigilt, b'5 is actliilly ab6ve tll(,, taiii@Cli, still, beettise of tli@, sli@,,I@t TO lost n-iotion between the bottoiii of t,h(@ ci-oss lieid and@the bottoii@ of slot @is coilipai-ed to the f aiare-,i ter distance be,tnvet@ii the bottom of weitlit 35 i,nd sliotild(,,@ ',')2, it %vill I)e, clear tliit the r ss e d NNill iii4pact onto siicl 75 c o h a taiiiper befoi@e the ii-eiglit Fig. 4, illtistraies the (@,-xterioi- pti-ts ilft tlle positioii -%vhere t-he bars 37 @trc- jti@t, ab6ut to be actuated to i-elease the iveiahf'35, ancl tt stieli point, the ei-anks 8 and 10 are @netirly to the dead.centei' point of the first half of revolution of @tli sbaft 6 Whe the tai-nper strikes e n the conerete, i@respective, of tlle extent of fill of the i-nold, the cross lieid 21 will be@free f roni en a,-emeiit witli tlle abutiiieilts 2f) so 85 9 that @tbe spi-ings 26 ivill be@ fi-ee to - exereiQ-41 theii- full st.ren- n gtli in iil'lpartiiig a dow ward thrust to the cross head 21. it Nviii be @ clc-,ir that if the ibiitilIeDts 29, ai.i,ested the cross li.ead 21, before t,]-te taiiip@r 30 striiek tlie conei-ete, tlitt. stich interfei-eii@c@ woiil(l rob tlic, t-,@iiiiper of thc@ full f@orce of 'ts tl-,tiiipiii@,, blow. Hence, by i-c@fei,ence to FIA,r. 5@ it, ivill be @ seen that tlie're is: a cle@l-rance betnveen the -,ibtitiiieiit@ 29 and @the ei-o--,s 'liead 9,1 ,,tnd t-lii@t the spi-ings 26 are still teiisioiie(i by i-ea,,Qoli of the fact@ that the cranks S ,tnd '10 h-@tve i.eielied a lower dead center position, tind tile springs liai,e yielded in 6i@(ler that tliei etanks could ne(-otiite the lower@ ttirn. A @orre,- i erior I)arts ,"@osition showiil., the- 'iit spoiidin,-- is illtistpated in Fig. 7. 0 : N w a8 the shaft 6, ContinLies in ,I clockNvise' direction, viewintr Fig. 7@ the SI)rino,s 26, @vill fil'st be sl-,teken@ed and@ then the @bilt't,@me-nts 29 @will en-af),e the cross bead 21 ,ifid t-, z@, lift the latter. This @liftin,, of cross head 21 Nvill take up the I 104 illotioli be.tweleii tile, u@l-) of e-rolls head:, 9,1 and th'e toi) of slot 33, as sliown in Fio-. 7 and th@ taiiipei- and w@ight@ 110 %vill be elev@Ated to tli-e inititil I)ositi6n, ,is Nv@ill noiv be cl from tlte f(re(,,-oiii(,, @osit-ion. e ,@ee,n by,tefereiice to Fig. 6. It: will be noted@ 'r@eba,,sll,@villfir,,t,be@@,,)reidtol e tli@-t, the lost ii-ioti6ii b@tW"n@tlie bottom of :,,knd Nvill iiiiiiieditt(,I-v tliereaft(@r 1)@, 5 [lie cross head -)I ai@cl t-h@ bottoni of slot 33, itlelitlpzel(ll by spi-in-s 39, to tli(-, Fii)@. 2. T)os.ition. is@ii,iany tii,.ies. less than the distance b@tweell) it will' now be clear tliii,t @becaiiso ' the, w C" the impact the bf;itciii of igbt 35 and spi,in(@s 26 are un(ler teiisioii.wlien tli.e tainper ,,h i No-%A, as the prrts dese@nd, c ik crete,, per 0-ildoi32 tb str' (@ the con initially, tlitt the taii:i taiiipei- 3,0, N,%,ill first strike The colnerete,@ whicli cannot rebolind, b-Lit ivill be lietcl to.:its p6siini@ial iinpa,et f,the d a d@ ti - oiigliotit will be t e 0 ownw r on of impact ivitli@tlie coneret(@ tlii 0 0 tamp tli@ @heid 21 s-tr 1,-e f the er This will' arre'st the the pei-iod iltiriii- whi6li cross warcl nd i@,ht E'5, stic t,,imper, or i-ather top 4furth@r dowift a we @- , cossive].V strike the'taml)ej. 3iiovei-nent tbereof. The deseendilrig cross bead Coneretc, Diiid'is ve@y siliggisli iiiatei-i,,il to 'dly -,iii(-I'f i will liexf strike the bottom@ of @iot. 3,3, @ ancl feed, espe@,iiii-@ to f,(.eci rapi 'll'trllel@, (,O: tlii,,@ ivill constitute the,. second impact of tl@e it,requires thot-oligli ta,iiiy,)in!-r. NoAv it lias siiigle (.Iownw,@ird itrokei Immediatolv aftoi qlw--,,iys been a, pr6b].(@,iii,@f6 @ffc@etivel @ taiyij) y the cross ]lead ba-, struck the tarnper tho' cone@-@t@ a8 rapi@1) ti !..i,s it co Icl bc, fe(l,@aiid I ivei,o;lit 35 will strike sbotilder 32, and this@ li,(ive @,,@olved the prol)leiti, ii6t by' ineileasing will@constit,ute the tbird impact 6f the one the actiial rate of speed@ 6f the t,,t@.iper, whicli 130 65 w ul-d be objectionable, btit by@@tlie novel ,tild single downward stroke of the tamper. o