US883983A - Concrete-mixing machine. - Google Patents

Description

'PATENTED APR. 7', 1908. R. T. sOLLITT. concam: MIXING MACHINE.

PP I AT L .28 1 A L 0 ION II ED NOV 903 BSHEETS SEEETL PATENTED APR. 7 1908. N0 883983 R. T. SOLLITT.

CONCRETE MIXING MACHINE. APPLICATION FILED NOV. 28, 1903.

8 SHEETS-SHEET 2.

H.883 as. PATENTED APR.7 190s.

'R. T. SOLLITT.

CONCRETE MIXING MAOHINB.

APPIIOATION FILED NOV. 2a, 1903.

8 SHEETS-SHEET 3.

PATENTED APR. '7, 1908.

R'., T. SOLLITT. CONCRETE MIXING MACHINE.

Arrmunlo'n nLnn'Nov. 2B 1903.

. 1' a sums-sum 4.

P M I H G TMAB M IE RT E R nu N 0 nu APPLICATIOH FILED NOV. 28, 1903.

8 SHEETS SHEET 6.

PATENTBMPR. 7, 1908.

8 SHEETS-SHEET B.

R. T. SOLLITT. CONCRETE MIXING MACHINE. APPLICATION E' ILED NOV. 28 1903.

PATHNTED APR. 7, 1908.

a SHEETS-$31151 7.

R. T. SOLLITT. CONCRETE MIXING MACHINE.

APPLICATION FILED NOV. 28, 1903.

No. 883,983. PATENTBD A PR. 7 1908. i

R. T. SOLLITT.

CONCRETE MIXING MACHINE.

PP 01 1H 51) v.2 1. A MAID sauna-sum a.

I? j Z1 193 M1 71 ass 6s. 1 v @(fiflfQ/Z WW I M chines, of which the following is e s13eeifieewe accompanyeasilyiiendledl plzir View, ill

m i es "m i f x ,31

ALPH T. SOLLITT, CHKEWO, ILLINOIS.

GDNCRE TE 41km Application filed November as, 1903.

To LU 21172 om ii may concern:

Be it kllOWIl that l, RALPH T. SOLLHT, a citizen of the United States, resid ng at Chicago, 11; the eounty oi Cook and State '01 Illinois, have invented certain new and use- :iul improvements in Concrete-Mixing Ma tiori, reference beinghed to iii g drawings.

iviy invention'reletes to machines for mix- Specification of Let-lie":

ing the ingredients used in melt ng concrete,

which are usually crushed stone,

sand, cement.

'It has for its object to provide a new and I improved machine, by which. the mixing 0i ients may be thoroughly effected the ingred and by which the materials, both before {miter mixing,

(lee ribed.

VJhet I regard as new is set forth claims. In the accompanying drawings 5. side elevation, illusireti an end. view, pare y in section, illustrating a. mien View of the snown in i i. 1; tion. of that cert 4 e 1e i...g-pe11s;i*1g. 3 1s hopper end ad acent parts Fig. is a longitudinal of "the mixingmpperetus which lies bet she charging-pans '5 l View, illustrating the inner portion of chewing-pens and adjacent parts of the and and

may be more economically and l accomplish this ob ct as illustrated 1n the drawings and as herenmteer in the ,-Figure 1 one form of machine embodying my invention; Fig. 12 is s an enlarged 1 iew oi a pert or the eonveyer-meehamen 111 Figsl and 4; F 1g. 6 1s a longitudinal Dian shine; Fig. 8 is a side elevation of one of the T al 1g. 9 is e part1 modified form of conveyer GEC'LlOH on line 1010 of Fig.

q i I l nks of the eonveyer shown. in Figs. 5 and 9 el prim View, illusireting a Fig. 10 is a erossline side elevation, filler modification; Fig. 141s plan VIE-W or a part of the mechanism shown llustre ling Fig, 1 6 is an end ViBW Sid e t to e 1 ion nlustre g e wee operating mechanism hrougli which if ac rtizil plan View, partly lit"; SllG'Wl tli errengemeni oi oper l s and clutches ma. sine is e trolled; Fig. vetiori the form or" epeuratus, Fig. 1; F 2'. a partial longitu. tio'n View of the upper portion of ne and earrier,-slrowing also :1 park of liver ,--spou't; and 2 1- is fi.,il()1ll60i tion on line 24--2 l of 2b.

In the simplest form of my iinpizfoved me chine, 'liustraieil in. Fig. 1, 1 proriil 1 x Fell W5? inclined trough 21, wl'iioli leads from :2. 4 J stantially l'zorizontal trough 22 best slimm in Fig. 2 to a hopper 123,-the upper end of trough being: a. suflieien'bly high elev; so that, n. hopper of ihe required e peei 75 mey be used. The hopper m.

Gil

legs 24, and is provided a-ifa1iinel25, 11

by erosso of swinging-links The gate is is e m y com:

mel .1 ends b pivots 2%; \Yii'll t. oi the no per as shown in Figs. The 'uoli that may be sv m L from the i. -.sl1oim 'obted lines in Fig.

till-3 iullllm. if: groiind,--ihe arre-iigement being so;

SUl'i'lClBllil' space is provii'l .Jl for a barrow to be set below the hopper to i'PMl ye the contents thereof.

The usual ing encs fer reek are supplied to the horizontal eliargingqimns 30-3l, arrr sides there and pivoted ill ta, at poinbs sh -l1 .y above tlwe si\ es the L pivots 34 as siuiiwn in 3f. 22. l

36 imlieetes braces, (011E198 For: (:rel i" iin g ills pi EMF-35.

3: iu' iceies she-ft, by \vliieli a 30 ere oeliied to disem U inio the 1 1 is moiml' zl horizontal V .7 17 sent Lllf e theirinner ends to the shaft 37, as shown in Figs. 1 and 2. Said cables are so arranged that when one of them is wound upon the shaft 37 the other is unwound, as shown in .Fig. 1, so that by rotating said shaft in one direction or the other, either of the pans 3031 may be tilted to discharge its contents into'the trough, while the other is rocked in the opposite direction, into position to receive a fresh charge. A crank 42, or other suitable device, is provided for rotating the shaft 37.

In practice, sand, cement and stone in proper proportions are dumped into the pan which is in position to receive the charge, as, for example, the pan 30 in Fig. 2. The shaft 37 is then rotated, raising-the pan with its contents and discharging the mass of materials into the trough 22,-the other pan at the same time moving down into position to receive another charge. The materials so dumped into the trough 22 are mixed, and simultaneously elevated, by a traveling conveyer 43, consisting, in the form shown in Fig. 1, of an endless chain which passes around a lower pulley 44 and an upper sprocket-wheel 45,said sprocket-wheel being mounted upon a shaft 46 mounted on the hopper 23 and driven from a drive-shaft 47 by intermeshing pinions 4849,as shown in Fig. 1. The shaft 47 is provided with fast and loose pulleys 50'51, shown in Figs. 1 and 3, so that its operation may be readily controlled. It may be driven from. any suitable source of power. The pulley 44 is carried by a shaft 52, suitably mounted in sliding-boxes 53 mounted in supports 54 near the standard 38. By this construction the pulley 44 may be adjusted to regulate the tension on the conveyer-chain 43.

As best shown in Figs. 1 and 4, the lower portion of the chain 43 passes through the trough 22 and up through the trough 21 carrying the materials up on the trough, on which they rest during the mixing and elevating operation,the upper portion of the chain forming the return. In orderto hold the lower portion of the chain 43 down in proper operative position, I provide a tension-pulley 55, best shown in Figs. 1 and 7, which is loosely mounted on shaft 56 fitted with suitable collars 57 which are cylindrical in form and are adapted to engage the side edges of the trough 21 when said pulley is in its lowermost position, as shown in Fig. 1. Springs 58 are provided, which, at one end, are secured to the sides of the trough 2l,*their free ends resting upon the collars 57, exerting downward pressure thereupon. Adjusting screws 59 are provided over the springs 58 for regulating the tension upon the collars 57. To prevent the shaft 56 from becoming displaced, said shaft extends through slots 60 in side plates 61 provided adjacent to the standard 39, as-

ssaees is free to move toward and from the upperedges of the trough, except in so far as its position is controlled by the springs 58. By

this construction the pulley 55 has sufficient freedom of actionto permit of the passage of large masses of material without danger ofbreakingjand the tension-pulley 55 cannot move downward far enough to cause the conveyer to bear too hard upon the trough.

If desired, the collars 57 may be arranged to bear in the slots 60 instead of on the upper edges of the sides of the trough 21, in which case said slots are suitably enlarged, as shown in Fig. 17.

The construction of the conveyer-chain 43 is best shown in Figs. 4, 5, and 6,-from an inspection of which it will be seen that said chain is composed of conveyer-links 62 and connecting-links 63. The conveyerlinks 62 consist of open rectangular frames, shown in Fig. 5, having downwardly-extending blades 6465 which also extend forward at one side, after the manner of a plow. As shown in Fig. 5, the blades 64 extend downward, and are coincident with the side edges of the links 62, while the blades 65 project both downward and laterally beyond the side edges of said links. On alternate links 62 the blades 65 project'in opposite directions, as shown in Fig. 5. The links 63 are small bars'which pivotally connect the links 62. The conveyer-links 62 do not act solely to elevate the mass of materials in the trough, but, by moving upward through the inclined trough 21, they serve to effect a complete intermixture of the ingredients, which are delivered to the hopper in a thoroughly mixed condition. The conveyer is so constructed that the materials are not carried up continuously, but are given an intermittently progressive movement,falling back from time to time over the upper edges of the blades 6465, and being also thrown from side to side, by the blades 6465, owing to the form and arrangement of said blades, the forward edges of which are inclined, in whole or in part, to the line of movement of the conveyer; so that any given quantity of material is turned over many times before reaching the hopper. gous to that secured when such materialsare hoed by hand, as is the custom where machihery is not employed for mixing purposes.

In order to control the feeding of the unmixed materials to the trough 22,,1 provide a plate 66, which extends over the trough 22, as shown in Fig. 4, and is provided with a number of openings 67 through which the material dumped upon said plate from the pans 3031 may pass to the trough 22. The size of the openings 67, and the feeding of the material through said openings, is controlled The effect is analothe materials are carried up irregular assess by sliding-plates 68 secured to the upper side which are turned down, as shown in Fig. 4,

so as to lie in the path of the conveyor. By this construction the plates 68 may be adjusted to project a greater or less distance into the openings 67, thereby regulating the size of said openings; and the hinged ends of said plates operate to agitate the material lying on the plate 66, since, as the conveyer moves along, its links successively engage the downturned ends of said plates, causing them to vibrate and agitate the n1aterial,-thus preventing packing thereof and insuring the proper feeding of the material through the openings 67.

in Fig. 9, l have shown a modified form of conveyer-mechanism, in which I employ two conveyer-chains 7273 arranged to move through the troughs 2l- 22 side by side,-being operated by sprocket-wheels "is--75, respectively, mounted on a shaft 76 which corresponds with the shaft 46. Said sprocket-wheels 74-75 are of different diameters, so that the chains 7273 move at different speeds. In other respects. they are operated similarly to the chain Each of said chains 7273 is composed of a series of links 77 having blades 7 8, shown in Fig. 8,- the blades of the two chains 72-73 being oppositely disposed, as shown in Fig. 9. By thisconstruction the materials are thrown back and forth across the trough from one conveyer to the other as it moves upward therein,thus effecting a thorough intermixture thereof. In this arrang ent also J the transverse movement of the materia effected by the operation of the belts at d1iferent rates of speed, being supplementary to such movement.

In Fig. 11 I have shown an amplification of the construction shown in Fig. 9, in which I employ three crmveyer-chains 79-S0-8L respectively,-the outside chains 7981 be ing driven by pulleys 82-83 of the same di- 'ameter, While the intermediate chain. is

driven by a pulley 84 of di'lierent diameter thinner-rid pullevs Allol' said pull mounted on the same 555, wt corresponds with the shalt Thus the outside chains move at the same rate of speed, While the intermediate chain moves at a different rate, of speed. By this construction, also, I secure thelateral movement of the materials, together with their irregularly progressive movement.

A further irn rovement, especially applicable where a p urality of chains moving at diii'erent rates of speedare employed, consists in a'trough 86 having a depressed portion 3 which. one of the chains moves. As shown in Fig. 31, the depressed portion (\7 is arranged interinediately and receives the chain 80,-the blades of which are flat, whereas the blades of the chains Til -Q0 are inclined, as shown.

Instead of using an endless coi'weyer as lescribed, I may also employ oonveycrs'zi ranged to reciprocate, as best shown in Fig. 13, in which two reciprocating conveyers SS SQ are provided, the conveyer 8E4 operating in the inclined trough 21, while the conveyer 89 operates in the horizontal trough :22. Said conveyers consist of i. unes provided at their ends with brackets 90--9l and 92-- 93, respectively, by which said frames are guided as thev :eci n'ocato. For guiding the conveyer rollers are pro v ided near the ends of the trough 2) said roll running in the slots 9 5 91 form-ed b the brackets 91, as shown in Fig. 13. The core veyer S9 is guided by the roller 95 and a roller 98 at the opposite end of the trough 22,-said rollers running in slots 99 100 formed by the brackets 92-93. Said conveyers are reciprocated by pitnien l0l-l()2, respectively, connected to a crank-pin r03 carried by a oisl; 104 mounted on a shaft lib) which carries pulley 106 driven by any suitable source of power. Each of the conveyer" Ski--89 carries a series oi blades 107. which are hinged to depending arms 10?? in such manner as to swing forward, but not backward: consequently when said core veyers S8 89 move to the left, shown in Fig. 13, they travel longitudinally of the trough, and the materials in advance oi" the blades H)? are carried forward and up 'l. At the same time part oi the material over iiows the upoer edges of the blades and falls back upon Le n'iaterial behind it. (lo the return movement of said conveyors l he blai lee 107 swing on to a substantially horizontal position,'rioin g over the materials in the troughs. This construction also provides for e intermittently progressive movement 1e materials.

n1 l i s. l5 and 16 I have shou ri [I mechanism consisting oi revol 109 110 carrying dcpeui'ling rig 'ob also tr ever in the trouggl i B the frames lflll, while that in. ti

consists oi three 0 the frames l 1. i i frames 109 are supported by upper and lower shafts ll2- ll3 at the ends of the trough 21,-which shafts carry cranlearn s 114 115, respectively, to which the ends of t frames 109 are pivoted, so that as said shafts rotate, the frames 109 revolve through the trough 21, carrying up therein any encountered by the arms 11 Tl .o frames 109, course, op upon the mat the iron manner the l'i'zum-s ill) in the i rials &

supported by arms 115 and by similar arms 116 carried by a shaft 117 at the opposite end of the trough 22, sothat the arms 111 of said frames 110 0 erate to move any materials in the troug 22 along until they are taken u All the frames 109-110 are 0 erated from the shaft 113, which is provide with a gear 118, or other means for driving it from any suitable source of power. By this construction I provide for the lateral or transverse movement from side to side of the materials in the trough, as well as the intermittently progressive movement, since the materials are thrown from side to side by the blades of the different frames.

In Figs. 17 to 20, I have illustrated the embodiment of my invention in an automobilemachine, so that all the parts of the apparatus may be readily and quickly transported from lace to place, and by which also the mixed concrete may be discharged from the machine directly to the place where it is to be used, without the intervention of manual labor. In the machine shown in said figures, I em loy a supporting frame 119 mounted on ront'and rearwheels 120-121,- the front axle 122 being connected to a ver tically-disposed spindle 123 having a wheel 124 by which it may be rotated to guide the machine. The rear wheels 121 are provided with sprocket-wheels 126, connected by a chain 127 to a pinion 128 mounted on a drive-shaft 129 carried in suitable bearings below the frame 119 and driven from an engine 130 by a chain 131. The engine 130 may be ofany suitable type for the purpose. 132 indicates a standard at the rear end of the frame 119, which supports a hopper 133 corresponding to the ho per 23, as shown in Fig. 17. The standarr 132 also carries a shaft 134, which corresponds to the shaft 46 and carries a sprocket-wheel 45 by which the conveyer-chain 43 is operated. The upper end of the trou h 21 is also pivotally secured to the standarc 132 as shown in Figs. 23 and 24. The forward end of the trough 22 is supported from the carriage-frame 119 by a hanger 135; and as the ad'acent ends of the troughs 21-22 are secure together, as best shown in Fig. 4, the parts of the apparatus may be wholly suspended from the frame 119. In practice, the hanger 135 is made vertically adjustable by means of a screwthreaded bolt 136 which is fitted in a suitable bearing 137 carried by the frame 119, and.

screws into the hanger 135; so, that by rotating said bolt the hanger 135 may be raised or lowered at pleasure, to raise or lower the trough 22. For rotating the bolt 136 it is provided with a hand-wheel 138, as shown in Fig. 17.

When in use the trough 22 rests on the ground, but for transportation purposes it is raised out of contact with the ground by by the blades of the frames 109/ means of the bolt 136. When the trou h 22 is thus lifted the lower end of the inc ined' trough 21 is also lifted by reason of its connection with the trough 22, the two troughs together being supported clear of the ground by the carriage,-the forward end of the trough 22 being suspended by means of the hanger 135 and the rear or upper end of the inclined trough 21 by pivots 220-221,

shown in Fig. 24, which permit the lower end of the inclined trough to be raised and lowered.

The charging-pans 30-31 are tilted in the portable machine shown in Figs. 17 to 21 by means of cables 139-140, which connect, re-

respectively, on the upper ends of verticallyarranged shafts 150-151, which carry at their lower ends levers 152-153, respectively, connected by connecting-rods 154- 155, respectively, with hand-levers 156-157 placed near the operators seat. (See Figs. 17 and 21.) Thus, by'means of the levers 156-157, either of the drums 141-142 may be operatively connected with the shaft 143. Said shaft is driven in a constant direction by means of a chain 158, which connects sprocket wheels 159-160, mounted, respectively, on the shaft 143 and on the engineshaft 161, as shown in Fig. 21. The s rocketwheel 160 is loosely mounted on tie shaft 161, and is adapted to be connected. therewith by clutch-mechanism 162 operated by a lever 163 carried bya vertical shaft 164 and adapted to be rocked by a lever 165, connecting-rod 166 and hand-lever 167, so that by operatin r said hand-lever the rotation of the main c rive-shaft 143 may be controlled at pleasure.

As hereinbefore described, the machine is propelled from the engine through chain 131. As shown in Fig. 17, the chain 131 passes over a sprocket wheel 168 mounted onthe shaft 129; and as shown in Fig. 21, said chain passes also over a sprocket-wheel 169 mounted on the engine-shaft 161. The. latter sprocket-wheel is loosely mounted on said engine-shaft, and is adapted to be operatively connected therewith by clutch-mechanism 170 operated by a lever 171 which is carried on a vertical shaft 172. Said shaft also carries a lever 173, which is connected by a conmeeting-rod 174 with a hand-lever 175, so that the operator may connect or disconnect the wheels with the engine. For reversing the wheels to back the machine, I provide a 1Y6 mounted on e leather on the resin drive-shaft 143 end adopted to he moved o engagement with e geer 17-? mounted on l ne 129, as shown in Fig. 20. The-gear 175 is'nioved laterally to mesh with the gear H by a lever 178, mounted one vertical L7 and connected through e'le'ver 1S0 connecting-rod 181 with a liendlever The ma hine may be stopped by disonnccting ti sprocket- *hoel with the engine-shaft lfi'l. It may be driven forward or connecting said sprocketcvhe 1 k 'ne-sliuit, and. it may be lie. d by disacting seid s'proclmt-vi'heel with the enshuit end ceasing the 176 to interso with the gear 177 these different opus being accomplished by operating spproyrinte hund-.-evers, all of which, as shown in Figs. l7 and 21, are arranged adjaor to each other in front of the oocrnlors indicmes u SglOOli' c-wheel, 's'liich is :-d y chain 184 with the sprocketwhich iizi is the corweyl-xr 43. The spro! lcet-whecl 183 loosely mounted rue-in drive-shalt lell, snd is oils .zted so be connected thereto 0 clutch-iueci'ianisin 185 .l oncmted a lever 18?? mounted on a vertical sl l t 187 and con p na e-d by e lever E5 38 and co nccl' lOLl 1539 u hand-lover 190, as lor may redily ou'o'i rue corwoyer, r. itlrout regard to rut-ion of the other ports of the rnecl1 u s with in: hi 5 {Hill pro- 4 pivotelly a r end in a. sleeve 192, 3 t is free to smug from side IO side us The sleeve W2 is sup- 1y a 'otetnole post or coluuui M93,

.5 lower end upon the ironic r tes a, brace for the lower por- I *he 191. The post 293 is ronl one direction or the other, to swing s out 191 from side to side, by means of ilreun 1%, connected at its free end to an 1% which is secured to and projects 1e post 193,.es shown in Figs. 1? and t lhe opposite end of sand pitnmn 'lS con-- The iuluptcil rorugugo the rear wheels.

l with said i seen that the operator at all times has corn trol of the various operations of the and may drive it in either direction, may regulate the operation of the conveyers, the charging of the materials, and the distribution of the mixed concrete, according to his pleasure. In order that he may steer the machine es well, I provide a supplementary steering-wheel. 20?, mounted on a shaft 208 near the opera nous seat and connected with the steering-wheel 124 by s cable 209 which passes around a wheellLO mounted on the l. er portion of the shaft 208, as shown in Fig. 17.

So for as I am aware, no one has heretofore produced a concreteunixing machine in which the materials to be mixed have been simultaneously elevated and moved laterally r trans versely from side to side, and thereby mixed; and, so for 'as the generic invention is concerned, it is inuneterinl Whether this result be acc mplished by means of either or the forms of apparatus described or by other equivalent. means, as my invention includes, broadly, the use of other mechanisms equivalent for those described. Furthermore, l wish it to be understood that, except in so for as the particular constructions illustrated are specifically claimed, my invention is not restricted to details of construct on. but includes, generically, the suhjeictuustter of the broader claims.

1. A coucrete-mixing machine, coiupr'sing e11 inclined trough on which the materials to bo'mixedsro supported during the eleysling and mixing 0 oration, "means for elevating and mixing tare materials in said trough,

st; 15 My lion's l trough eugni in ug i cor iecting therewith, en en nveyer adopted to move through ssl ghs hsvinq menus for elevating; en. nix ng the nieterieis, end swinging pens at csite sides of said conveyer adapted to supply meteriels to he mixed to said horizontal trough. y

3. A concrete-mixing machine. comprisin a trough longitudinally inclined with rororcucc to a; horizontal plane, on which the nuitcrinls to be mixed zu'c supported during the elevating and mixing operation. a so? stantially horizontal trough adjacent to said inclined trough and connecting therewith, an endless conveyer adapted to move through said troughs and having means for elevating and mixing the materials, swinging pans at opposite sides of said conveyer adapted to supply materials to be mixed to said hori. zontal trough, and means for actuating said pans alternately to discharge the contents thereof into said horizontal trough. w 7

4. A concrete-mixing machinefcomprising a carria e, a vertically-adjustable trough supported thereby, said trough being longitudinally inclined with reference to the horizontal, means for vertically adjusting said trough, and means operating in connection therewith for elevating and simultaneously mixin the materials to be mixed.

5. 1i concrete-mixing machine, com-prising a carriage, a trou h longitudinally inclined with reference'to the horizontal, a horizontal trough communicating with the lower portion of said inclined trough, an endless traveling conveyer adapted to move through said troughs and having means for elevating and mixing materials supported in said troughs, and means carried y said carriage for operating said conveyer.

6. A concrete-mixing machine, comprising a carriage, a trough longitudinally inclined with reference to the horizontal, a horizontal trough communicating with the lower portion of said inclined trough, an endless traveling conveyer adapted to move through said troughs and having means for elevating and mixing materials sup orted in said troughs, means carried by saic carriage for operating said conveyer, and means for raising andlowering said horizontal trough.

7. The combination of a carriage, a trough supported thereby and longitudinally inclined with reference to the horizontal, a horizontal trough communicating with said inclined trough and supported by said carriage,,means for moving materials through said troughs and mixing the same as they are carried up through said inclined trough, means for vertical y adjusting said horizon ta trough, and means carried by said carriage for operating said moving and mixing means.

8. The combination of a carriage, a trough supported thereby and longitudinally inclined with reference to the horizontal, a horizontal trough communicating with said inclined trough and supported by said carriage, means for supplying materials to be mixed to said horizontal trough, means for moving the materials through said troughs, and mixing the same in said inclined trough, means for vertically adjusting said horizontal trough, and means carriedby said carriage for operating said supplying means and for driving said moving and mixing means.

9. A concrete-mixing machine, comprising a carriage, means carried by said carriage for elevating and simultaneously mixing the materials to be mixed, driving mechanism mounted on said carriage, means for driving said elevating and mixing means from said driving-mechanism, and a discharging de vice mounted on the carriage and arranged to receive mixed materials from said elevating and mixing means, said discharging device being adjustable to distribute the materials.

10. A concrete-mixing machine, compris ing a carriage, means carried bysaid car riage for elevating and mixing the materials to be mixed, driving-mechanism mounted on said carriage, means for driving said elevating "and mixing means from said drivingmechanism, a discharging device mounted on the carriage and arranged to receive mixed materials from said elevating and mixing means, said discharging device being adjustable' to distribute the materials, and means for adjusting said discharging device by means of said'driving-mechanism.

11. A concrete-mixing machine, comprising a trough,- a conveyer operating in said trough to mix the materials placed therein, a plate extending over said trough and having openings for the passage of the materials, plates adjacent to said openings for regulating the size thereof, said plates having downturned ends, and means for charging materials upon said plate,

12. A oncret-mixing machine, comprising a tro gh, a conveyer movable through said trough, a plate extending over said trough and having openings for the passage of the materials to be mixed, and plates adjustably carried by said first mentioned plate, the latter plates having hinged ends adapted to engage the conveyer.

13. A concrete-mixing machine, comprising a trough longitudinally inclined with reference to the horizontal, on which the materials to be elevated are supported during the elevating and mixing operation, and a plurality of traveling conveyors arranged to move upivard in said trough said conveyers having means which operate to elevate and mix the materials supported thereby.

14. A concrete-mixing machine, comprising a trough longitudinally inclined with reference to the horizontal, on which the materials to be elevated are supported during the elevating and mixing operation, a plurality of traveling conveyer-s arranged to move upward in said trough said conveyers having means which operate to elevate and mix the materials supported thereby, and means for driving said conveyors at different rates of speed.

15. A concrete-mixing :nachine, comprising a trough longitudinally inclined with reference to the horizontal, on WhI'QlTl the ma terials to be mixed are supportediduring the ssaaes elevating and mixing operation, and a lurality of traveling conveyers arrange to move upward in said trough said conveyers havin means which operate to elevate and mix tie materials supported thereby, said trough having a depressed portion extending longitudinally thereof. 7;

v16. A concrete-mixing machine, comprising a trough, a plurality of conveyers movable longitudinally of said trough, said conveyers being arranged on different levels and having means which operate to elevate and mix the materials supported by said trough, and means for driving said conveyers.

17. A concrete-mixing machine, compris ing a trough, a lurality of conveyers movable longitudina ly of said trough, said conveyers being arranged on difierent levels and having means which operate to elevate and mix the materials supported by said trough, and means for driving said conveyers at different rates of speed.

18. A concrete-mixing machine, comprising a trough longitudinally inclined with reference to the horizontal, a plurality of con veyers adapted to move upward in said trough, said conveyers being arranged to carry upward therein the materials to be mixed and to move said materials transversely from side to side, and means for driving said conveyers at diflerent rates of speed.

19. A concrete-mixing machine, comprising a trough longitudinally inclined with reference to the horizontal, said trough having a depressed portion, a plurality of conveyers moving in different planes in said trou teria ls therein, and means for driving said conveyers.

20. A concrete-mixing machine, comprisin a trough longitudinally inclined with re erence to the horizontal, on which the materials to be mixed are adapted to he sup ported during the elevating and mixing operation, said trough having a depressed portion, a plurality of traveling conveyers on different levels in said trough and having means which operate to carry the materials therein upward and mix the same, and means for driving said conveyers.

RALPH '1. SOLLITT. lVitnesses:

JOHN L. JACKSON,

HELEN M. COLLIN,

h and having means for mixing the ina- I I

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