US633124A - Mixing-machine. - Google Patents

Description

No. 633,124. Patented Sept. 19, I899.

-W. M. CUMMEB.

MIXING MACHINE.

I (Application and Apr. 8, 1899.! (No Model.) 2 Sheets--Sheet 1.

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N0; 633,]24. Patented Sept. 19, I899.

W. M. CUMMER.

MIXING MACHINE.

(Application filed Apr. 8, 1899. (No Model.) 2 sheetsfsheet 2.

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UNITED STATES PATENT EEicE.

\VILL OUMMER, OF CLEVELAND, OHIO.

MIXING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 633,124, dated September 19, 1899.

Application filed April 8, 1899.

To all whom, it may concern:

Be it known that I, WILL M. CUMMER, a citizen of the United States, residing at Oleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and. useful Improvements in Mixing-Machines and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to mixing-machines such as are used on a large scale or of a large size for mixing asphalt compositions for pavements and other purposes and generally for mixing plastics and compounds of various kinds requiring thorough incorporation and union of all the elements. It occurs in machines of this kind not only that there is excessive wear in the moving parts, requiring repair and replacement at different intervals, but when differently-conditioned materials are to be mixed requiring also different constructions or styles of mixing blades or arms. Obviously also in the case of machines built in the large proportions or size of these it is both difficult and inconvenient to handle the mixer shaft and blades and gears in one part or as a whole to make changes, because they are not only Very heavy, but also very awkward for handling. Hence I have conceived the idea of building a machine with a sectional shaft having a single removable part and two stationary parts, all substantially as shown and described,and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan View of a mixing-machine containing my improvement. Fig. 2 is a cross-section on line 2 2, Fig. 1, disclosing the invention in two partic ulars,as hereinafter fully described. Fig. 3 is a perspective View of one of the end sections of the shaft, and Fig. 4 is a perspective view of the matching end of the middle or removable section of the shaft.

A represents the casing or hopper of the machine, in which are two cooperating mixershafts, formed each in like sections B B, with blades O of any suitable kind, according to the material to be mixed, and gears D and D at opposite ends for jointly rotating the said shafts. As both shafts are alike, a description of one will suffice for both. Now to carry out my idea of convenience for exchange of shafts and blades, I have made a shaft consisting of three sections, two equal end sections B and one longer middle section B. One of the end sections is shown fully in Fig. 3, where it is seen to be circular in cross-section to form the bearing part of the shaft and receive a gear-wheel on its end, while the inner end thereof has a head I) with an undercut slightly-tapered mortise or recess b directly across its end, adapted to receive the correspondingly-formed tongue or tenon b on'the middle section B". This tongue has the form, substantially, of a dovetail tenon, except that it is wedge shaped lengthwise, and as the recess 1) is tapered to match the tenon the two when united form a flush and firmly-locked union of the parts,with their shoulders abutting. The same kind of joint is used at both ends of the section B, and of course the recess 1) and tenon I) might be reversed'as to the shaft-sections Without affecting the inventionthat is, the tenon might be on B and the recess on'B. Now having the shaft united in this way it is bound together and made practically the same as if it were one solid piece by means of the twopart flanged heads E, which carry the blades 0, and a cross-section of which is seen at the left in Fig. 2. These heads have width or reach enough to completely overlap the joints on both sides, and then by fastening the bolts 9 the work is complete and the middle section, with its blades, is in working position. Then in removing the middle section B, with its blades, I leave the end sections both in their bearings and undisturbed, and itis only necessary to take off the locking-heads E at each end and at once the said middle section is ready to be lifted out. Of course a special clip or fastening for thesejointscould be used in lieu of the blade-fastenings, but I prefer to employ the heads of the stirrer-blades for this purpose and make them perform a double office. In thisinstancel showamiddle-shaft section angular in cross-section, which is the preferred form; but this is not necessary, and hence the joint could be made by omitting the head I) and using a shaft which is cylindrical throughout. In that case a spline or other means would be required to prevent rotation of the blades on the shaft. It will also be noticed that the body orcasingAhas holes in its sides through which the shaft extends, which, however, are suitably packed or otherwise protected to prevent leakage at this point.

What I claim is-- 1. A sectional shaft for a mixer having stirring-blades provided with flanged heads and fastenings, said heads adapted to completely overlap the joints of the sections and fasten them together, substantially as described.

2. A shaft consisting of three several sections locked together at their ends, a series of stirrer-blades fixed to the middle section, and fastcnings overlapping the joints where cation this 8th day of March, 1899.

WILL M. CUMMER. \Vitnesses:

H. E. MUDRA, R. B. MOSER.

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