US920958A - Concrete-mixer. - Google Patents

Description

' D. E. JONES.

l- GONGRETE MIXER. APPLIOATION FILED 11m14.190s;

A1511181111111 May 11, 1909.

2 SHEETS-SHEET 1.

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DANIEL JONES, OF DETROIT, MICHIGAN.

' CONCRETE-MIXER.,

' Specioation.'of Letters Patent.

Patented may 1 i, 1909.

Application ledlvarch 14, 1908. Serial No. 421,110.

and State of Michigan, have vinvented certain new and useful Improvements in Concrete.-A

Mixers, of which the following is a specification, reference being had therein to the accompanying drawings. .i i

This invention relates to a concrete mixer and more especially to means whereby the ingredients are positively supplied to a mix-A ing chamber or drum in a predetermined ratio, and whereby simple, eective and readily adjustable driving and mixing mech-` anisms are provided.

The invention consists inthe matters here'- inafter set forth, and "more particularly pointed out in the appended claims.l

Referring to the drawings, Figure 1 is a view in longitudinal vertical section of a machine embodying features of the invention. Fig. 2 is a plan view of the-machine. Fig; -3 is a bottom view in detail of a mixer plate. Fig. 4 is a view in section indetail, enlarged, of the mixer. Fig. 5 is a view in transverse vertical section of a modified form ofthe machine. Fig. 6 is a view in section on or about line :1c-x of Fig. 5. i

In the drawings, 1 indicates an Vupright suitably designed frame preferably mounted on bearing wheels or casters 2. lar double hopper 3 of sheet metal or like suitable material is secured thereon, the side` Walls 4 of the hopper being cut away below the central transverse partitions. 5 to allow access from the side ofthe machine .to a main naled at the center of the machine in the bearings 7 of a yoke 8, the lower end of the shaft being steadied in a central bearing' 9 formed in a convex circular disk 10 which is adj ustably secured by any suitable means as bolts -11 to lowerhorizontal members 12 of the frame in such manner as to permit its vertical adjustment. The main shaft is geared through a bevel pinion 13 and gear la to a horizontal shaftV 15 extending outside the machine which may be operated either by a crank 16, pulley, or like suitable means. Each division of the hopper 3 has a discharge opening 17 through the partitions 5.

A helical conveyer 18 whose shaft 19 is rotatably journaled parallel to the outer hop-` per wall in an upper bearing 20 and a lower bearing 21 connected to the main frame, is

A rectangu-l geared to the drive shaft through a bevel gear train 22, and a second helical` conveyer 23 `whose shaft 24 is parallel to the other outer `wall of the hopper and is journaled at its upper end in a bearing 25 and at its lower end in a box 26 connected to the main frame, is connected by a bevel gear train 27 to the main drive shaft. Each conveyer is adapted to discharge .material in its side of the hopper `through the discharge opening thereof into a conical hopper 28 which is secured to the main frame below the main hopper 3, and forms substantially a continuation thereof with its discharge mouth 29 at an interval above the distributing disk 10.

A yoke 30 is-geared to the-main shaft so that its lower Vedge which conforms to the upper face of the disk 10. sweeps the disk. Arms 31 at the end of the yoke carry a horizontal annular plate 32 which is provided w-ith a plurality of dependent symmetrically disposed sweepsl or` rakes 33. of these rakes just clear the face of the disk 10 and are` preferably transversely beveled or chisel pointed. A conical drum 34 surrounds the disk 10 and is secured at its upper end tothe base of a tank 35 on the main frame around the second hopper. The bolts 11 ywhich support the disk 1.0 afford yadjusting means by which the disk may be raised .or lowered so as to vary the'annular opening between the edge of the disk and the conical drum 34 through which the material is finally discharged. An annular water pipe 38 is secured just above the mixing disk 10 and is connected through'a suitable valve 37 to the water tank 35, a valve stem 39 affording convenient means for manipulation.

In operation, the cement is placed in one side of the hopper and the sand in the' other and the respective conveyers are geared so as to each deliver the required amount thereby insuring the positive ratio in the quantities delivered on to the mixing disk. The centrifugal motion of the material as it works its way to the discharge edge of the disk, combined with the sweeping, cutting action of the yoke and rakes insures an even and thorough mixture of the material and inti mate distribution of Water throughout the mass as it is delivered.

Where it is desired to increase the length of the time of mixing, an auxiliary mixing disk 41, rakes 42 and drum 43 (as shown in transverse section in Fig. 5 and horizontal The lower ends section in Fig. 6) is placed below the main discharge drum 34, the main drive shaft being suiliciently lengthened to rotate the lower set of rakes and the main frame 44 being contracted and raised to support the parts as indicated.

Obviously, the details of construction herein shown may be varied without departing from the scope of the invention and I do not care to limit myself to any particular form or arrangement of parts.

What I claim as my invention is 1. In a concrete mixing machine, a main frame, a receiving hopper on the frame divided into compartments, means in the compartments adapted to positively discharge the contents of each compartment, a conical Vhopper below and common to the discharge openings of the compartments, a tank surrounding the conical hopper, a horizontal convex disk vertically adjustable in the frame below the discharge outlet of the conical hopper, a conductor adapted to distribute water from the tank over material on the disk, stirring means adapted to sweep the disk, and mechanism adapted tov simultaneously operate the compartment discharging means and the stirring means.

2. A concrete mixing machine comprising a main frame, a rectangular hopper thereon divided into compartments, a helical conveyer in each compartment adapted to positively discharge the contents thereof, an upright main drive shaft operatively connected to the conveyers, a conical hopper concentric ywith the shaft below the compartment outlets, a convex mixing disk vertically adjustable in the frame below the conical hopper outlet in axial alinement with the shaft, mixing means on the shaft sweeping the disk, a conical delivery drum secured in the frame encircling the disk with its delivery mouth below the disk, means adapted to distribute water over material on the disk, and means to rotate the drive shaft.

3. A concrete mixing machine comprising a main frame, a rectangular hopper thereon l veyer in each compartment adapted to posii tively discharge the contents thereof, an upright main drive shaft operatively connected l to the conveyers, a conical hopper concentric l with the shaft below the compartment outlets, a convex mixing disk vertically adjustl able in the frame below the conical hopper outlet in axial alinement with the shaft, a q diametrically disposed yoke on the shaft whose lower edge conforms to and sweeps the disk, an annular plate secured on the yoke, i rakes secured on the plate whose lower ends rotate with the yoke above the disk sweeping the disk, a conical delivery drum secured in the frame encircling the disk with its delivery mouth below the disk, means adapted to distribute water over material on the disk, and means to rotate the drive shaft.

4, A concrete mixing machine comprising a substantially rectangular frame, a rectangular receiving hopper thereon divided by a transverse partition into compartments having discharge openings in the partition, j an upright main shaft journaled in the frame beneath the hopper partition, a helical conveyer j ournaled in each compartment in the discharge opening thereof and operatively connected to the main shaft, a rectangular tank on the frame below the receiving hopper, a conical hopper extending through the tank concentric with the shaft and below the compartment opening, a horizontal convex disk secured concentric with the shaft below the outlet of the conical hopper, a diametrically disposed yoke on the shaft sweeping the disk, an annular plate on the yoke, rakes depending fi'om the plate above the disk, a conical delivery drum concentric with the disk outlet below the disk, and means to rotate the main shaft, said disk heilig vertically adjustable on the frame inside the drum. In testimony whereof I affix my signature in presence of two witnesses.

DANIEL E. JONES.

IVitnesses:

C. R. STICKNEY, OTTO F. BARTHEL.

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