US870797A - Concrete-mixer. - Google Patents

Description

PATBNTED NOV. 12. i907.

A. W. RANSOME.

CONCRETE MIXER.

mum-n10; 1:

.E.) NOV. 17. 1906.

2 SHEETS-SHEET 1.

noulfoz wimaoeo PATENTED NOV. 12. 1907.

A. W. RANSOME.

CONCRETE MIXER. nrmcnrori mum NOV.17.1905.

M m U m 2 SHEETS-SHEET 2.

ARTHUR W. RANSCME, OF NEW YORK, N. Y.

CON CRETE-MIXER.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application filed November 17.1906. Burial 80. 3431821.

To all whom i! only ronrcm:

Be it known that I, Air-runs W. RANBOXE, of the borough of Richmond. in the city of New York, Stat:- of New York, have invented ccrtain new and useful lmprovcments in (oncrem-Mixers, of which the following is sfull, clear, and exact specification, such as will enable others skilled in the art to which it oppertains to make and use the same. I

My invention relates to certain improvements in zipparatus for mixing concrete and other granular malerinl. It relates generally, to that class of apparatus in which a rotary drum is adapted to receive the materials to be mixed and which drum is provided intcriorly with lifting flanges or other mixing members, the material to be mixed, being charged into the drum and discharged therefrom when the mixing operation is complete. 1

The invention relates particularly to improvements in the rotary mixer forming the subject matter of the ,piror patent to Ernest L. ltansome, No. 814,803, dated larch 33, 1905. I

Heremfore drums were provided with a number of flanges extending obliqucly across their interiors and abutting closely against the discharge ends or'heads of the drums. Crossing these flanges were a number of opposing or return flanges which engage the inner edges of the advancing or lifting flanges and which are designed to set up a countcr movement of the material in the drum, effecting thereby a thorough admixture. In the practical operation of such mixers it was found that the flanges or bafllcs abutting snugly agaisnt the heads of the drum fornu-d corners of cavities in which there was a tendency of the concrete to accumulate and harden and thus, to some extent clog the machinc and intcrfcr'e with its cffcctive operation. it has also liccn found that the crossing or rclurn flanges, being extended across the inncr edges of the main or advanw ing flanges, retain but a minor portion of the material falling upon them and do not return the material toward the receiving end suflicicntly to prevcntaccumulation of thc matcrinl at the discharge end. This accumulation has, in some classcs of work bccn found [n be disadvanwgcous. H. has further been dowel-11ml in the practical op -mlion of thc mix is ln-rcloforc coni-trnch-d, that the crossing or rcfuro flang s, bcing cnganged with lluimu-r cdgcs of the main or advancing flange-s, arc not lash-nod in phu-c with ubmlulc sccurily and require much nrc to he I'Xl'l'lirll'll to pri-vcm. i cidcnlnl dislmlgmcnl. l".trthcr fhc bhnlc amine cmcnf.

ally in the art of mixers of the class to which the invention relatcs. In attaining this end, I rearrange the flanges in such a way as to admit of a thorough and unrestrained circulation, through and around the flanges, of the water which forms a part of the material within the drum. This water, being by my improved construction, permitted to wash in and out of the various crevices or corners clearing them of the accumulated concrete and preventing the clogging referred to. Furthe! by thus allowing the water unrestrained flow in the drum I avoid splashing of the plastic or semi-plastic material through the openings in the drum. 1 also, by the above referred to rearrangement avoid the neccs sity of placing the return flanges against the inner edges of the advancing or main flanges, but, on the contrary, locate said return flanges, directly against the inner wall of the drum alternately between the main or advancing flanges, securingthereby the double advantage of effectual return of the material and, therefore, effectual mixing and of easily, firmly and i'emovably securing the flanges in place against the walls of the drum. This enables me not only to securely fasten the flanges but to remove them easily for repair or otherwise.

My invention involves various other features of major or minor importance and all will be fully set forth hereinafter and particularly pointed out in the claims. I

Reference is now had to thc accompanying drawings which illustrate as an example one method of practicall y cndxldying the idea of means constituting my invention in which drawings Figure l is a view looking into the receiving end of a mixing drum to which my invention has been ap plied; Fig. 2 is a sectional view of thc same on the line 2-- 2 of Fig. I; Fig. 3 isa perspective view of one of the main or :ulvancing flanges; Fig. 4 is a plan view of one of the return flanges and Fig. 5 is a diagram showing a section of the inh-riorof the drum supposed in be spread out in a flat plain: and illustrating, by broken lines and arrow heads, the course of the water circulating through the drum to cffcct'thc wrwhinganrl non-splashing action hcrcinlu-fore nwntioncd.

in rcgard tothe drawings I would here cxplain that 1 ha W, in the interest of rdcarnem and illustration shown in Figs. 1 and 2, only the drum and its flanges in which rrsidc thc \sscnfial lcalurcs of my pmscnl. invention.

In prim-lice, as will be undersumd fromlhe prior ut particularly from the prior patent hercinbefore menprcviously cmploy d indu t-d splashing lo a mnsidcrtioncd that the drum is mounted to turn in a suitable abl dcgnwilh thc n-snltthal thc hcnringsof llndrum base, rind in combined with mechanism Iorimparting to wcricloggml and thc exterior of lhc nutchin covered it its rotating movement. As will also he undcrstmd will: umlcrinl lhruwn from the drum. from the prior art, the material is charged into the drum My or scnt invention, lln-rcfol has f .r its principal through one end and discharged from the drum through objects to nvcrconl tln-sc '||ccifit' disiulvantagcs, and theothcr. In Fig.2an arrow at indicates the direction at tiresome timet effect nmterial improvements generin which the material is charged into the left hand receiving end of the drum and in said view the broken I engagement.

lines 1) indicate the usual discharge chute by means of which the material is carried from the drum in the direction indicated by the arrow c. This discharge chute is usually hung on a pivot and may be tilted reversely to the position Indicated in Fig. 2 to delay discharge of the material until the mixing action is compl te.

All

of these things are fully set forth in the prior patent mentioned and constitute no part of my present invention.

10 indicates the main or advancing flanges.- Any number of these may be provided according to the nature of the mixer; in the type of machine lltlt' illustrated these main or advancing flanges arc six in numher, and they are arranged with their outer edges snugly against the inner surface of the drum, and extend for the major portion of their length diagonally across the same. At the receiving head of the drum, the flanges 10 are provided at their extremiti s with lips 10 and these are fastened by bolts 15 or otherwise. to the receiving head of the drum. At a point adjacent to the discharge end, the flanges are shaped with offset or inter- Vally disposed portions 10", which form lifting pockets.

facing the direction of rotation of the drum (see the diagram Fig 5 in which the arrow d indicates the direction of rotation) and serving to lift the material with the rotation of the drum and drop the same in to the discharge chute b, when said chute is in position indicated in Fig, 2. Said advancing flanges 10. however, instead of extending directly to and contacting with the discharge head of the drum, terminateshort of the same, leaving between the dischargeend of the flange and the corresponding head of the drum 9. space or passage 11. To hold the discharge ends of the flanges 1t securely in place,.I pro de Z-brackets 12 which are fastened by bolts 15 or otherwise to the discharge ends of the flanges and to the discharge head of the drum. Said brackets, however, are relatively narrow and do not materially obstruct the above mentioned passage 11. I further form the flanges 10 with an opening or openings 19 directly adjacent to the receiving head of the machine and close to the side walls of the drum. As will be observed from Figs. 1 and 3 the main or advancing flanges .10 are shown as of uniform width. This construction I prefer to employ since it insures-a uniform advance of r the material from the receiving to the discharge end The advancing flanges are fastened to the side walls of the drum by U-bolts 16 which embrace the flanges and pass through the drum walls. By these itistenings 15 and 16 the flanges are securely held in place and may yet be removed easily mod it will for repair or other- 14 indicates the or secondary flanges. These are provided with lips 14 which are removabl y fasby bolts 15 or otherwise against-the inner side cf the discharge headcl the drum and as shown in the drawings, these flanges 14 extend along and are redovably fastened by U-bolts 16 to the inner surface of the drum, the flanges projecting in a direction reverse to the directior in which the advancing flanges 10 extend. Furthenlhe return flanges 14 are arranged at ternately between the advancing and out of contact 1 therewith, both the advancing and return flanges bein engaged with the side walls'nnd heads of the. rum and 66 being held in place by the fastenings at such points of The return flanges are preferably formed with their inner edges tapering toward the receiving cud oi the drum. This marginal form is illustrated clearly in Fig. l. The return flanges extend from the discharge end, inward ton-ard the receiving end and terminated at approximately thc middle of the drum. Said return flanges arc located at equidistant points between the advancing flanges. The inner ends of the return ilungts terminate short of the advancing flanges, to leave a spot-e through which the water, concrete, etc., may pass freely as they slide along the advancing flanges. The return flanges are provided with an openin; or openings 14 in the comers between the discharge head and the sides of the drum, which openings serve to allow a thorough circulation of water, as will be hereinafter fully explained.

ln the use of my invention the material to be mixed. is charged into the receiving end of the drum,-the discharge chute is turned to reverse position, (op'posite that indicated in Fig. 2) the 'drum is rotated mix the material and when this operation in comlottthe discharge chute is returned to its operative position indimted in Fig. 2, and the material in the drum is raised by the flanges and discharged from the pockets l0 into and from the chute b, all of which will be fully understood. x

Upon the rotation of the drum, the material within the same is picked up by the advancing flanges 10 and, owing to the inclination of these flanges, as the flanges rise the material slides down on the flanges toward the discharge end and is then caught in the pockets if). Asthe flanges continue to rise with the rotation of the edges of the flanges l0 and is caught in-part by the drum, the material slides over the;

return flanges 14. this operation being assisted by the relatively increased width of said flanges 14'. Tho' material received by the return flanges is, owing to the position of the same, conveyed with the rotation of the drum downward toward the receiving end and is finally discharged from the inner ends of the return flanges partly upon the advancing flanges and partly" dumped down into the bottom of the drum where it p is reengaged by the advance flanges. It will thus appear that the construction which I have provided;

sets up, upon the rotation of the drum, an active countermoverpent of the material bringing about t thorough admixture thereof. By locating the return flanges intermediate theadipnce flanges, I increase the effectiveness of operation of the return flanges; carrying back toward the receiving end a larger quarttity of material than heretofore and preventing-onobjectionable accumulation of material at the discharge end. Further, 1 am enabled more securely ,yet rcntovably to fasten the flanges in place and thus increase the life and durability of the machine. and fadililate repair. This armngement of the flanges also contributes to the non-splashing effect by causing the rctuni flanges to deliver the material principally on the advancing flanges rather than totlrrow this 'rnaterinl violently into the bottom of the. drum.

furlhcr important function of the new construction which I prmridc, is the thorough circulation of watt; which i f: prevents 't'nt au-uotuigtiun of concrete in thrt-rmlt't's and corners and consequent clogging of the machine and also pix-vents lplashifig from the drum. As hereinbefore intimated. a common disadvantage of this (.iuSS of machines is the accumulation and setting of the concrete in the crevices and corners thereof, to such an extent that the operation of the machine is seriously interfered with.

It will be understood that in all concrete mixtures a certain quantity of water is pr sen and I take advantage of this condition and cause the wat r to wash out the accumulations mentioned. This washing action is possible in my invention. owing to the peculiar arrangement of the flanges and is illustrated diagrammatically in Fig. 5. In this diagraimoalical view the arrow 11 indicates the direction of rotation of the drum and the relative positions of the plates or flanges are clearly shown. The water in flowing openings 10'. the rest of th water whi h ngngcs the advancing flanges at this point. running down along the flanges and meeting the stream delivered from the flanges 14. It therefore, clearly app ars that the new onstruction which I have provided distributes the water completely over the various partswithin the drum and causes this water to flew through the crevices or corners between the flanges and the Wulls oi the drum, in which corners quantities of cement would otherwise be permitted to accumulate and in accumulating would tend to clog the machin Also by giving the water a clear passage splashing is prw vented.

Having thus specifically described the pref rred embodiment of my invention what 1 claim as new 5. A rotary drum mixer. having advancing and returnflanges, both engaging the inner walls of the drum and extending diagennliy from the respective end portions of the drum, towards the opposite ends thereof, lhe dvuncing linngo clearing the inner end of the return flange and iPillZlr ing beyond the same suhstuntlally to the opposit or discharge end of the drum and m ans [or removahl; curing the flanges to the side walls of the drum.

6. A rotary drum mixer, having udvunuing and return flanges, imh engaging the inn r wa ls of the drum and extending diagonally from the respective end portions of the drum, townrds the opposite ends thereof, the ndvtmclng flange ci -tiring the inner end of the return flange and reaching beyond the some substantially to the opposite or discharge end of the drum, and provided thcrem with an oil'- sci or bend extending toward the return flange and forming a lifting pocket.

7. A rotary drum mixer for concrete and slmllur \vcl plustlc materials, having a relatively stationary mixing iinnge in the drum lying in a plane snhstnnthilly rndlnl ol' the tonne and forming a (.Olill'l' or crevice with on end \\:iii of the same, the mixer having it pussnge at said corner or crevice allowing the clrculntion of water through said ornerto prevent accumulations of concrete therein.

8. A rotary drum mixer for concrete and similar wet plastic materials, having a relatively stationary diagonal mixing flange in the drum in a radial plane them-f and with one end oi the llunge juxtaposed and secured to, lrit spliced from the corresmndlng end'ut the drum, to allow clr ulnlion of water past the said end of the [hinge and prevent accumulations of concrete between said end of the flun'ge and the end of the drum.

t). rotary drum mixer for (:oncroll: and similar wet i plastic materials, having a diagonal mixing thinge in the drum with one end juxtuposed to, but spaced from the corresponding cud oi the drum to allow irculation of water t the said end of the ilungtand prevent accumulations of concrete at this pnilll, and u hrncket spanning the npncc hotweeu said ends of the flange and drum and fastened to suid ends of the flange and drum to hold the ilungt: in

place.

it). A rotury drum mixer for concrete and similar wet plastic matcrinls, having 11 diagonal mixing flange in the drum with a lifting pocket at one end. said pocket being I juxtaposed to, but spaced from the udjnccnt end of the drum to allow circulation of water lmtweon the pocket and the end of the drum and prevent. accumulations of concrete 1 at this point.

and desire to secure by Lett rs Patent; of the United States is:

1. A rotary drum mixer, hnvlng advanclngflnnges in the druid extending substantially from end to end thereof, and return flanges engaging the inner walls of the drum his tween the advancing flanges and extending from the discharge end of the drum toward, hut terminating short of the receiving end.

A rotary drum mlxcr, having interior advan ing flanges in the drum extending substantially from end to end thereof, said flanges engaging the walls or the drum and int rior return flanges en aging the wnlis of the drum between the advnnclng linngcs and extending from the dlscharge end of the drum toward, hutiterminnllng short or llu: receiving end. tin! return lhingcs Luring gr olcr width than the advancing flanges and tnpot'ing from the dlsehnrg lug toward the hemivlng cud o! the drum.

2!. A rotary drum mind-{having advancing and return flang s, iii the drum extending along the lnm-r walls ding onnliy respectiv ly from the end pol-lions of the drum, tovt'nrds line opposite ends thereof, the advancing thin i- Hearing the inner and of the return flange Ind rem-hing heyond the same. suhstnnllnlly to the opposite or disclturglend of the drum.

4. A rotary drum mix r, hnvlng advnnciuz: and return iiungI-s. In the drum extending along the inner walls diagonally n-s ns-tively from the end portions of tho drum to wards the oppositiends thereof, the ndvuncing llnugo cheat" in: the inm-r and of the relurn ihmgc nnd' chin; beyond ihe runnesubstantially to the opposite or' discharge cm! of the drum and formed thereut with n lilting pocket.

11. A rotary drum mixer for concrete and similar wet plustlt: materials having a. mixing linngc with its nd jnxtu osed to, but spaced from out: end of the drum to allow circulation of wall-:- past the said end of the flange, and a second mixing llnngo projecting from said end of the drum and having at passage through ll adjacent in fluid end.

12. .l rotary drum mixer for concrete and similar plnstit: materials, having a mixing llnnge extending dingonaily from one end oi th drum lo at point :uljucont lo the other end. the lll-sl end of the flange having-a pnssnge lhrough it and the second end of the flange being formed with a lifting pocket spliced from the adjacent end of me drum to form n pllfirlilgl: b tween it and the drum.

lit. rolnrv drum mixer for concrete and similar we phmllc tu:tt""inl-=, having :1 dingonul mixing flnngc. with a lifting pocket ul one end. said pocket being juxtaposed to but spucod from the adjacent and of the. drum for the purpose. specified, nnd a bracket. spanning linspace between flu: Illllng pockef and the end of the drum and pot-km and to the said end of the drum to hold the lifting pocket. in place.

14. rotary drum mixer. having advancing and return flanges, both clinging the inner walls of the drum and extending diagonally from flu: res ns-live end portions of the drum, towards the opposite. ends titer-ml, the advancing flange clearing the inner end of the return flange and reaching beyond the same sulmtnntinlly to the opposite or dischurgv. end of the drum and formed therein with I lifting pocket. spaced from the adjacent end 0! the drum to provide it washing pusslg f" 15. A rotary drum mixer, huvirig adv-":cing and return flanges, both engaging the inner walls of the drum and extending diagnnally from the respective end portions of the-drum, towards the opposite ends thereof, the advancing flange clearinghe inner end of the return flange and reaching beyond the same substantially to the opposite or discharge end of the drum and formed thercat with a lifting pocket spaced from the ndjacent end of the drum to provide a washing passage, the return flange being perforated adjncent to the discharging cml of the drum and the advancing flanges being perforated adjacent to the 16. in n concrete mixer, a rotary, drum hitting Ii flange secured to its inner wnlhnnd extending therein/m in substantinlly a radial direction, said flange luring one and connected to an end wall of the drum and provided ndjncent thereto with anropening for the passage 01 water.

17. A total; drum mixer having a plurality oi. diagonal advancing flanges in the drum :extending substantially parallel and substantially from end to end of the drum, each flange having at the discharge end of the drum n lateral oifset forminga lifting pocket, all of such pockets facing alike the direction oi rotation of the drum and ends of the flanges adjacent to the ends r: heads 0! the drum, such passages allowing the circulation of water substnni'lniiy as described to prevent accumulations of cuncreie in the drum in testimony whereof have signed my name to thispecificaiitm in the presence of two subscribing wituessel.

ARTHUR W. RANSOME.

'itneuses

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