US670222A

US670222A - Concrete-mixer.

Info

Publication number: US670222A
Application number: US4049600A
Authority: US
Inventors: Howard Campbell
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-12-20
Filing date: 1900-12-20
Publication date: 1901-03-19
Anticipated expiration: 1918-03-19

Description

No. 670,222.' Patented mar. |9,'|9o|.

H. CAMPBELL.

GGNGRETE MIXER. (Application med me. 26, 190m (No Model.)

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lilivrThn STaTns PATENT Trice.

HOWARD CAMPBELL, OF BROOKLYN, NEW YORK.

CONCRETE-MIXER.

SPECIFICATION forming part of Letters Patent NO. 670,222, dated March 19, 1901.

Application filed December 20, 1900. Serial No. 40,496. (No model.)

To all whom it' may concern/.-

Be it known that I, HOWARD CAMPBELL, a citizen o'f the United States, residing at the borough of Brooklyn, city and State of New York, have invented a new and useful Improvement in Concrete-Mixers, of which the following is a specification.

The object of my invention is to provide a device to thoroughly mix the component 'consist of an elongated rotating box into which the ingredients are shoveled, said box having staggered shelves on its opposite sides and set at an inclination. The ingredients being shoveled in at the top of these mixers merely roll from one shelf to another, and so on through the mixer, sometimes passing through cross-bars to make the mixing more thorough. These mixers are apt to clog with very little service and are not generally efflcient.

My device comprises an elongated shell, preferably of rectangular crosssection and set vertically. The upper part, into which the concrete ingredients are shoveled, is hopper-shaped, and the bottom is tapered in order that the concrete may be brought together before leaving the mixer. Inside the shell I provide inclined staggered deiiectors, with which the concrete comes in contact. These deiectors are secured to rods passing through the shell. The sides oi' the shell adjacent to the rods and above the deectors are turned in to form a stop for said deectors. I also provide a spring for every deiector to keep the same in bearing with said stops. As the ingredients in their descent strike these deiiectors they are borne down and then react, moving back to position by the action of the springs, and by this reaction the ingredients are thrown upward and toward the opposite side of the mixer and are not allowed merely to roll from one defiector to another through the mixer by gravity. The details of construction and the automatic Water-supply will be hereinafter more particularly set forth.

In the drawings, Figure l is a front elevation and partial section of the mixer. Fig. 2 is an elevation and partial section of the side of the mixer. Fig. 3 is an enlarged plan View of one series of shelves.

a represents the elongated shell, preferably of rectangular cross-section. At staggered intervals on the opposite narrow sides ot the mixer the shell is bent in at ct. Below this portion a the same narrow side is rolled in, as at d2, leaving a small space between the lower part of ct and the upper part of (t2. The deliectors l) are secured to rods c by hinges or otherwise, the rods c being supported by suitable bearings c', which latter are secured to the Wide sides of the shell. The detlectors b and rods c are so placed that in their normal position the detlectors bear upon the lower ends of the bent-in parts ct'. Beneath the rod c and supported in the same bearing I employ rods d. Around these rods are springs d, one for every deliector, one end of the springs being attached to the rods d and the other ends passing through slots in the portions a2 of the shell and brought to bear on the under sides of the deilectors. One end of each rod d passes through the front of the shell and carries a ratchet e, having a pawl adapted to engage the same. It will be apparent from this construction that any desired tension may be brought to bear upon the detlectors b through the springs d, the lower portions a of the shell forming stops for the deflectors.

The portions CL2 of the narrow sides of the shell may be rolled in and extended, so as to leave sufficient space for the deflectors to move down and have suicient play, the parts CL2 having slots for the springs d' to pass through. It will be noticed by, this construction that the essential parts of the springs and the parts supporting and upon which the deilectors swing are amply protected from contact with the concrete ingredients as they pass through the mixer, the

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part of the shell a forming a shield above them and the part a2 forming a protector against those parts of the concrete ingre.- dients which may be thrown up from the next defiectors below. I-Ience the tendency to clog is reduced to a minimum. By this construction the springs and their supports and the supports for the deflectors are also on the ontside of the shell, which is a feature of no smallimprtance and conveniencein the matter of repairs.

The upper or first deflector h I prefer to make integral with lthe shell d. All the other defiectors are arranged as described, and as many series ot' them may be employed as is necessary to a thorough mixing of the ingredients.

A pipe 7L conveys the necessary water to the mixer. This pipe terminates in the center of the mixer above the shelf D in a nozzle or sprayer Z. In the pipe h and in asuitable position outside the shell is a valve t', whose valve-stem carries a lever fm. To the upper series of defiectors l? I secure an arm fn. The lever m and the arm fn, are connected by the link r. In the normal position, as shown, the valve is closed; but when the deflectors of the upper series are depressed the valve is opened through lever fm, link r, and arm n, and water is permitted to escape into the mixer. The valve is closed again as soon as the deiectors return to the normal position.

At u I have shown a plat-form from which the component parts are shoveled into the mixer and at o a platform below on which the concrete is received after being mixed.

The apparatus may be supported in any suitable manner, no means of support being shown in the drawings, as the same forms no part of my invention.

In the operation of the apparatus the mixed ingredients are shoveled from the platform u into the hopper at the top of the shell and fall first against the fixed detlector b and roll down and fall against the top series of deflectors h, depressing the same,opening the valve, and letting water into the mixer. As these deiiectors spring back into position afterimpact they throw the ingredients which caused their deflection up and over to the other side of the shell, where the ingredients fall to the next series of deflectors, this operation being repeated with each series of deflectors until the concrete passes out, mixed, to the platform o.

I claim as my invention 1. In an apparatus for mixing concrete and similar materials the combination with a rectangular shell, of inclined pivotally-mounted and automatically-movable deflectors for arresting the fall of the materials and diverting the same from side to side as they pass through the shell, substantially as and for the purposes set forth.

2. In an apparatus for mixing concrete, and similar materials, and in combination, an

elongated shell, means for automatically and alternately deflecling and throwing theingredients to be mixed, from one side of the shell to the other as said ingredients gravitate through the shell, and means for automatically supplying water to the said ingredients as they pass through the mixer, substantially as specified.

3. In an apparatus for mixing concrete, and similar materials, the combination with an elongated rectangular shell, of aseries of piv oted deflectors on opposite sides of the shell occupying a staggered relation to one another within the shell, springs below said defiectors, variable-tension devices to which one end of each of said springs is fastened the other ends passing through slots in the shell and bearing against said deflectors tending to elevate the same and cause the defiectors t-o bear upon the lower part of a bent-in portion of the shell, and means for automatically supplying the necessary water to the concrete mixture, substantially as set forth.

4. In an apparatus for mixing concrete, and similar materials, the combination with an elongated rectangular shell, of a series of staggered, downwardly-inclined defiectors, springs beneath said deflectors to produce an upward pressure against the same, rods passing through said shell at one end and to which one end of said springs are attached, ratchets on said rods outside the shell, and pawls adapted to engage said ratchets whereby the tension in the springs may be varied, and means for automatically supplying the water necessary to the mixture, substantially as set forth.

5. An apparatus for mixing concrete and similar materials comprising an elongated rectangular shell having opposite bent-in sides at spaced-apart staggered intervals, where there are elongated spaces and openings, a series of inclined deiiectors extending through the openings, rods extending across said spaces and on which the defiectors are pivotally mounted, means for holding said deflectors against the lower end of said bentin portions of the shell and means for varying the pressure against the same; a pipe extending into the shell, a nozzle, at the inner end of the pipe, a valve in said pipe, an arm secured to the upper series of deflectors, a link and lever for connecting the deflectors to the valve-stem of said valve so placed that when said deflectors are depressed the valve is opened and water allowed to escape into the mixer, substantially as and for the purposes set forth.

6. An apparatus for mixing concrete and similar materials comprising an elongated rectangular shell having opposite bent in sides at spaced-apart staggered intervals, where there are elongated spaces and openings, a series of inclined deflectors extending through the openings, rods extending across said spaces and on which the deiiectors are pivotally mounted, a series of springs each ZOO IIO

to the valve-,stein of said valve, so placed that when said deleetors are depressed the Valve is opened and Water allowed to escape into the mixer, substantially as and for the purposes set forth.

Signed by lne this 18th day of December, 1900.

HOWARD CAMPBELL.

Witnesses:

GEO. T. PINCKNEY, BERTHA M. ALLEN.