US796591A - Concrete-mixer. - Google Patents

Description

PATENTED AUG. 8, 1905.

W. B. MARTN. CONCRETE MIXER..

Brummen funn 00T. 13,1904.

2 SHEETS-SHEET 1.

Wtnesses: Y nventor;

/ if l v Rttomegs.

PATENTED AUG. 8, 1905.

W. B. MARTIN. CONCRETE MIXER.

nrLo'noN FILED 00T. 13. im.

2 SHEETS-SHEET 2.

f f Rttomegs.

W' z Y These iiights are combined with the sha each adjacent partition 36, forming a measuring-cup, into which a predetermined quantity of material is fed and discharged on each rotation of the cup, the fianges constitutin also cut-offs. to or are inte ral with hubs 38, throu h which pass' sha ts 39, 40, and 41, said sha ts being suitably journaled in the sides of the casing and projecting at one end therefrom. The shaft 40, which is clearly shown in Fig. 2, constitutes the driveshaft and carries three sprocket- wheels 42, 43, and 44, the shaft being driven in any suitable manner, as by a pulley 45, around which passe-s a belt leading to a suitable source of power not necessary to be shown. Around the sprocket- Wheel 42 asses a` sprocket-chain 45', the lower ben of which engages a sprocketwlieel 46 on a shaft` 47, presently to be described. The sprocket-.wheel 43 carries a sprocket-chain `48, which passes around `a sprocket-wheel 49 on the shaft 41, While the sprocket-wheel 44 carries a sprocket-chain V50, which passes around a sprocket-wheel 51 on the shaft 39. By this arrangement the s rocket-Wheels and sprocket-chains and all t e measui'in -cups arc driven in the same direction and om the same source of power as lis also the shaft 47. Arranged longitudinally of the casing and extending from both ends thereof is a chute 52, which is connected with a discharge-spout 53, that extends outward beyond the casing and is provided at its free end with a lip 54, the spout being su ported from the casing by a pair of brace-ro s 55, onl one of which is shown, arranged on each side of the spout, and by a brace-rod 56,secured to the spout near its outer end and to the up er portion of the casing. This spout may ige circular in cross-section, as shown, or semicircular, as may be desired, and as the latter construction Will be obvious illustration thereof is deemed unnecessary. Arranged within the discharge-spout is a worm or conveyer which constitutes one of the essentialfeatures of the present invention, inasmuch as it not only o crates to remove the mixed material from t e casing, butalso thoroughly to mix the in ,gredients before discharge. This conveyer consists of se ments or flights 57, each being a proximate y a half-circ e and being twisted on a compound curve, the flights being disposed in break-joint relation to each other, so that when assembled they will, in effect, present a screw, but with spaces between the terminals of the Aadjacent lights which will permit the terminals to present a means for cutting through thel mass and of thoroughly mixing and in a measure disintegratin through themedium of' arms 58, thel outer ends of which are riveted to the i hts and the inner-'ends of which are rigidly olted to the shaft. The rear end of the shaft is jour- The partitions 36 are secure naled in suitable bearings in the side of the casing and, as before stated, is driven through the medium of the sprocket-chain 45 and s rocket-wheel 46, and the outer end of the s aft is journaled in a box 59, carried by a three-legged spider 60, secured at or near the discharge end of the spout.

To supply the necessary water to the ingredients while being mixed, there is a i e 61, which is supported near its outer end) lgy a bracket 62, secured to the spout, and passes through a bearing or collar 63, secured to the side o the casing, and thence into the casing and substantially across its entire width, as shown in Fig. 2, the portion of the ipe within the casing being provided witli suitable perforations to permit escape of Water. The outer end of the pipe is provided with a nipple 64 to allow attachment thereto of a hose or other suitable Water-feeding device.

The operation of the device is as follows: Sand, cement, gravel, or stone is supplied, respectively, to the compartments `5, 6, and 7 and rfalls upon the ledges 15, 16, and 17, it being understood that the material is fed into Ythe compartments in such manner as to cause `it rst to lodge u on the ledges.

The cups being rotated, eac compartment thereof Will removf` from the mass a predetermined charge and dischagge it down the chute into the inner portion of the discharge-spout, the cutoffs 37 preventing any accidental escape of materia from the compartments to the chute until'an additional cup is presented` for another charge. As the materials from the three compartments pass to `the dischar espout they are sprayed with Water from t e pipe 61, and as they are moved forward by the conveyor they are thoroughly commingled, so that when discharged from the spout their treatment wilLbe thorough. The rapidit of the operation of the total output of the evice will of course be controlled by the rate of speed at which the cups and other rotative parts of the mechanism are driven.

As shown in Fig. 1 one of the compartments 7 is provided with a check-plate 20; but, if

preferred, this may be combined with each of the compartments, as shown in Fig. 5, and still be within the scope of the invention.

It will be seen from the foregoing' descrip- `tion that although the apparatus of this 1nvention is exceedingly simple of construction it combines in a feasib e 'and practical manner all the elements necessary for the production of a thoroughly-effective machine, and, further, owing to the sim licity of the4 construction of the parts and the manner in which they are assembled liability of breakage in use is reduced to a minimum and great'facility of repairs is secured.

Itwill be noted that the cups are of different sizes, that for supplying gravel or stone to the chute being the largest, that for supplyi'ng sand the next largest, and that for supplyin portions generally be that adopte paratusybut it is to be understood that the di'erent cups may be chan ed in their relative roportions tov each ot er, if the saine etween the cu s herein shown will sho d he found necessary or desirable, without ldeparting from the spirit of the inves tion.

Havin thus described the invention,| what is elaime is An apparatus of the class described comprising a casing divided into a pinraity of compartments each provided with s shield constituting a throat-picco, rotative measuring devices arrangd in the compartments adiaeent to the s 'olds and havin their siafts arranged in the saine plane, an ledges disposed above the measuring devices to cause a' side feed of the material thereto.

2. In an a paratus of the class described, a casing divi ed into a plurality .of eoinpartments of diferent size-s, rotative measuring devices arranged in the com artments the shafts of which are arrange on the saine plane, means for independently operatin the devices, curved extensions arrsn e above the devices and cari' ing each a lei? e, a chute arranged below t e measuring vices, and a eonveyer driven from the said devices and operating to mix and remove the material from the apparatus.

cement the smallest, and the proE I in an organized .ap-V

An apparatus comprising e. casing divided into a piurality of compartments each provided with a shield constituting a throat-piece, rotative nieasnrn devices arranged into compartments a 'scent to the shield and having their sliaits arranged in the saine plane, ledges disposed above the measuring devices to canse a side feed of the inateriai thereto, and spring s pressed cheek plates coaeting with the said devices.

a 4. in an apparatus of the class described, a casing supporting a pinrality of differentsized rotative measuring devices, formed into cups each inciuding a. cut-ofi, a s ring ressed check plate cogerating Wit the argest Iof the devices, a e ute arranged below the measnrin devices, a spout constituting a portion of t e chute and projecting laterally from the casing,` and a eonveyer arranged within the spout and comprising a plurality of inversely-twisted segments, the

terminals of which are arranged in break= joint order with relation to each other.

In testimony that l claim the foregoing as my own I have hereto aiiixed my signature in the presence of two Witnesses.

WLLIAM B. MARTN.

Witnesses:

WM. FLEMING, ED. PEIRoE.

ofthe ciass described'

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