US926171A - Measuring attachment for concrete-mixers. - Google Patents

Description

L. W. GARGILL.

MEASURING ATTAOHMENT FOR CONCRETE MIXBRS.

APPLIOATION FILED JUNE 26, 1908. I

Patented June 29, 1909.

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MEASURING ATTACHMENT FOR CON CRE TE-MIXERS.

Specification of Letters Patent.

Patented June 29, 1909.

Application filed June 25, 1908. Serial No. 440,232.

To all whom it may concern: Be it known that I, LAWRENCE W. CAR- GILL, a citizen of the United at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Measuring Attachments for Concrete-Mixers, of which the following is a specification.

y invention relates to the improvement of measuring attachments for concrete mixers and the objects of my invention are to provide in conjunction with the hopper and mixing apparatus of a machine of the class mentioned, improved means for accurately measuring the quantitvof mixture discharged into-the mixing trough; to provide a closure of the underside of the hopper while the material to'be mixed is being discharged into the mixing trou h and to produce other improvements t 1e details of which will bemore fully Ipointed out hereinafter. These objects accomplish by the means illustrated in the accompanying drawing, in which:

Figure 1 is a central vertical section of a hopper and a paratus having my improved measuring evice in connection therewith, Fig. 2 is-a transverse section on line xa: of Fig.1, and, Fig. 3 is a detail view in perspective of the measuring and discharging box.

Similar numerals refer to similar parts throughout the several views.

1 represents the vertically disposed flaring hopper of a concrete mixer which is supported upon a horizontal base or platform 2, the latter having extending downward from one side thereof the inclined innerwall of a mixing trough 3 in which is contained a suitable rotary mixing device, which latter may be in the nature of a conveyer or screw 4. 1 In portion of the hopper I form an opening an beneath this opening is adapted to be supported a box or receptacle 5, the latter mg formed on its rear side with a horizontal extension 5, the up er side of whichis closed and the lower sldh of which bears upon the floor or platform 2. The undersi e of the receptacle 5 is provided with a bottom plate 6 which is hinged at its rear end to the framework of the receptacle as indicated at 6*.

On the trough side of the hopper opening through which the box 5 is adapted to move,

' I provide the outlet of said opening which is indicated at 1, withparallel horizontal 'ide projections 1",'one 0 these projections eing States, residing f I indicated in Fig. 1 of the drawing. With the end or side-"of the receptacle 5 which is adjacent to the trough I pivot as indicated at 7 one end of a bar or link 7, the outer end of which is in turn pivotally connected with an arm 8 which is carried on a horizontal rock shaft 9, the latter extending in the direction of the length of the mixing screw 4 and being mounted in suitable bearlngs 10 supported from near the upper portion of the trough 3.

The shaft 9 also carries an arm 11 with the outer end of which is pivotally connected at downwardly extending bar 12, the lower end of which I have shown pivotally and eccentrically connected with a disk 13 which is carried on the shaft 4 of the rotary mixer 4.

14 represents a brush bar or head which is secured horizontally to the inner face of the forward side of the hopper 1 and from this bar or head 4 depend vertical brush wires'14" the lower end portions of which are flush with the upper side of the receptacle 5.

In utilizing my invention, it will be understood that rotary motion is suitably iniparted to the mixer, its shaft 4 and disk 13 and that when the box 5 is receiving its charge of crushed stone, sand and cement or other materials, said box is located within the lower opening of the hopper into which the material to be mixed is suitably fed. Owing to the rotation of the disk 13 and the consequent reciprocating movement of the' bar 12, it is obvious that an intermittent rotation of the shaft 9 will be produced and through the connection of said shaft with the bar 7, the box 5 will have imparted thereto an outward and inward sliding movement. When said box is thus moved outward to the position indicated in dotted lines in Fig. 1, it is obvious that its hinged bottom plate 6 will drop downward into the trough, thus permitting the contents of the box to drop to the mixer. In the movement of the box to the position shown in Fig. 1 of the drawing, it is obvious that the hinged bottom plate 6 will be forced to a closed position. When the box is in its outer or 0 en position, it is obvious that the top of the 0x extension 5 Will have moved to the position where it will intersect the hopper and prevent the discharge therefrom of material which may be contained therein. The connections between the box 5 and the rotary mixer are 'so arranged as to insure an outward dis-.

charging action of the box at each revolution of the mixer, thereby providing for the complete discharge of a predetermined quantity of material into the mixing trough at regular intervals. During the outward movement of the box, it is obvious that the brush wires 14: will serve to prevent, the material from being forced outward over the'top of the box.

Although I have shown and described specific means for producing an outward and inward movement of the discharging and measuring box from the rotary movement of the mixer, it is. obvious that other desirable connections might be employed.

From the construction and operation described, it will readily be understood that means are provided not nly for producing a beneath said hopper, said boxhaving a rearward extension 5 a which lies beneath the bottom of the hopper when said box is at its foremost limit of movement, a 'rotative mixing member disposed in the bottom of said trough, connections between said rotative mixing member and-said box for imparting a reciprooatory movement to said box, a toothed brush secured to the front wall of the hopper, the teeth of which extend down to the top of said box, and a flat late hingedly secured to therear wall of the ox, said plate a lying between the bottom of the box and the extension of the. trough when said box is at its rearmost limit of movement, said plate riding down over the inclined wall of the mixing trough when said box is at its foremost limit of movement.

In testimony whereof I affix my signature in presence of two Witnesses.

LAWRENGE W. CARGILL.

Witnesses: w

L. CARL S'roUsH'roN, I A. L. PHELPS.

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