US1096098A - Mixing-machine. - Google Patents

Description

B. G. CUMMINGS.

MIXING MACHINE.

APPLICATION FILED MAR. 20, 1913.

Patented May 12, 191i EDGAR C. CUMMINGS, OF WATERLOO, IOWA.

MIXING-MACHINE.

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T 0 all whom it may concern:

Be it known that I, EDGAR C. CUMMINGS, a citizen of the United States of America, and a resident of lVaterloo, Blackhawk county, Iowa, have invented certain new and useful Improvements in Mixing-viachines, of which the following is a specification.

My invention relates to improvements in mixing-machines, and the object of my improvement is to provide a novel and efiicient type of mixing-blades for the machine, and also to improve the machine so as to permit the mixing-blades to be actuated continuously, while allowing the materials after being mixed to be discharged in batches or determined quantities. This object I have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Figure 1 is a vertical longitudinal medial section taken on the line ab of Fig. 2, of my said mixing-machine. Fig. 2 is an end elevation of said machine, with parts sectioned and broken away. Fig. 3 is an edge elevation of one of my multivane mixingblades, and Fig. 1 is a perspective view of the same.

Similar numerals of reference denote corresponding parts throughout the several views.

My mixing-machine comprises a casing 9 supported on base-blocks 26. Its open top has an outwardly-flared edge 14, and like swing-bottom plates 11 and 12 are hinged at 13 along the meeting longitudinal angles ofsaid part 1% and the casing 9, the part 1% with said plates serving, when the latter are drawn up to contact along their inner longitudinal edges, as a hopper in which to deposit quantities of unmixed materials prior to mixing. medially longitudinally through said casing with its ends seated in bearings 18 and 19, one end of the shaft without the casing having a crank 17 with projecting handle, and a hinged drop-piece 20 serves to engage said handle to hold it in an adjusted position to hold it from movement as desired. Chains 15 are connected between said shaft and the plates 11 and 12, and are rolled upon or from said shaft when it is rotated in either direction to elevate or drop said plates.

The numerals 7 and 8 denote bearings on Specification of Letters Patent.

Application filed March 20, 1913.

A rotatable shaft 16 is located Patented May 12, 1914. Serial No. 755,664.

the opposite ends of said casing over alined bearing-openings therein, and a longitudinal shaft 1, square in cross-section is located longitudinally within said casing, said shaft having covering sections 6, alined thereover, of cylindrical form exteriorly, and extending into-said bearings to rotate therein. Between the sections or sectional sleeves 6 are located the mixing-blades 3, each blade having a square central or axial opening 2 whereby it may be non-rotatably mounted on the shaft 1.

The sleeves 6 clamp the blades 3 upon said shaft 1 against longitudinal movements thereon, but both the sleeves and the blades are removable from the shaft when desired to disassemble the machine for repairs. Upon the right-hand outer extremity of the shaft 1 and extending into the bearing 8 is the elongated hub 37 of a gear-wheel 23, the latter enmeshed with a pinion 24: on a short stub-shaft supported in a projecting part of the bearing-body 8 (not shown). A belt-wheel mounted on said shaft 38 serves to transmit power from some source of power not shown.

The mixing-blades 3 including their radial vanes are of relatively large diameter, and the bottom part of the casing is made semicylindrical, and spaced away therefrom a suitable distance. The bottom of the casing is in two parts, a fixed integral part 39 which is carried a little beyond the medial longitudinal line of the bottom, and a hinged laterally swinging part 27, hung upon a shaft 31 at the side of the casing to swing laterally over an inclined delivery plate 28 thereunder, the upper longitudinal edge of the latter being secured under the delivery edge of the fixed bottom part 39. In order to open or swing outwardly the said hinged part 27, and hold it either open or closed, I have adopted the following-described means for the purpose.

Bearings 33 are secured on the outside of said casing and seat a longitudinal shaft 31 on which is hung the outturned upper longitudinal edge of the part 27 movably. On one end of the shaft 31 extended beyond the end of the machine, is an integral crank 34 having a relatively heavy weight 35 on its extremity adapted to counterbalance the weight of the part 27. Lever arms 30 extend fixedly from the shaft 31 and have their extremities pivoted to pintles 29 in lugs on the outer face of the part 27. When the crank 3 1 is swung upwardly to the right, the rocking of the shaft 31 causes the arms 30 to swing the part 27 outwardly, and if the weighted crank is thrown far enough to the right, it will pass beyond the dead center and hold the part 27 open. When the part 27 is closed, as shown, the weighted ball 35 serves to hold it tightly engaged with the other fixed bottom part 39, to prevent leakage. On each side of the casing above the blades 3, are longitudinal slots 4:0 furnished with outwardly projecting upwardly-inclined receiving edges or parts 21 and 22, and water may be introduced through a hose 3G or other means through said slots 10 into the interior of the casing below the hopperplates 11 and 12, when it is the proper time to moisten the dry mixed materials.

Referring now to Figs. 3 and a, which are views of one of the mixing-blades, the blade is cut or formed from a single integral. plate and has a plurality of radially-projecting mixing-vanes. The vanes are alike, and each a'no has its opposite outwardly-extending edges or parts bent at approximately rightangles to the main part of the blade, oppositely at 1 and 5 to extend in a direction parallel with the axis of the shaft 1. This form of vane renders it a true mixing-vane, divested of any of the essential features of a propeller, and there is therefore no tendency for the mixingblades 3 to propel the contents of the machine toward one end or the other thereof. The vanes in rotating therefore need only be impelled to stir up and thoroughly mix the contents of the machine, the projecting parts l and 5 of the vanes beating flatly upon such contents and moving therethrough in a way to exercise the maximum of displacing effect thereupon. These flat parts, in moving through the n11- mixed materials divide them up, carry portions of one kind of material through and mix it with the other materials, and beat up and disturb the whole mass effectively, in a minimum time. The machine is therefore a rapid mixer. of materials have been deposited in the hopper then dumped into the machine, and mixed dry, the shaft 1 with the mixing blades 3 being kept in continuous rotation,

When the proper amounts water may be introduced through the openings at 21 and 22, and the mass further mixed to become homogeneously moistened, then the swing-gate 27 may be opened, and the contents discharged into some receptacle over the inclined plate 28. The gate 27 is then swung back, and another batch of unmixed materials dumped into the machine. The machine is therefore at once a continuous and a batch mixer, and combines the good features of both types.

It should be noted that the oppositely bent-over parts 4: and 5 of the mixing-vanes are converged toward their outer ends, which not only favors the forming of such parts from the integral blade, but also aids in the mixing and delivery of each vane.

This machine, while primarily intended for use in mixing concrete materials, may be used to mix any other substances, and may be varied in its details of construction within wide limits, without departing from the essential principles of my invention.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. In a mixing-machine, a rotatable mixing-blade having a plurality of vanes, both the blade and its vanes being set in a plane intersecting the axis of the blade at a rightangle, each vane having its outwardly-directed edges bent oppositely and at approximately right-angles to the body of the vane, the bent-over parts being converged to meet at their outer ends.

2. A longitudinally extended mixing Vessel having an open top, a closure for said open top, said vessel having a longitudinal slot extending substantially the length of said vessel and located immediately below said closure, and movable mixing means operatively located in the lower portion of said ch amber longitudinally thereof and below said longitudinal slot.

Signed at Waterloo, Iowa, this 10th day of March, 1913.

EDGAR C. CUMMINGS.

Witnesses G'Eo. C. KENNEDY, W. H. BRUNN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPatents, Washington, D. C.

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