US1334895A - Mixing and discharging apparatus for cement and cther substances - Google Patents

Description

L. H. EICHELBERGER. MIXING AND DISCHARGING APPARATUS FOR CEMENT AND OTHER SUBSTANCES. APPLICATION FILEDJAN. I9, 1917.

1,334,895. Patented Mar. 23, 1920. 2 SHEET$-SHEET I. %9

'1 Atty L..-H'. ElCHELBERGER. MIXING AND DISCHARGING APPARATUS FOR CEMENT AND OTHER SUBSTANCES.

APPLICATION FILED JAN. 19, 1917- 1,334,895. Patented Mar. 23, 1920.

2 SHEETS-SHEET 2- lmmlllllllllm Ill In ventor:

A rty LEWIS H. EIGI-IELBERGER, 0F PLAINFIELD, NEW JERSEY.

MIXING AND DISCHARGING APPARATUS FOR CEMENT AND OTHER SUBSTANCES.

Specification of Letters Patent.

Patented Mar. 23, 1920.

Application filed January 19, 1917. Serial No. 143,208.

To all whom it may concern Be it known that I, LEWIS H. Tiller-Inn woman, a citizen of the United States, and a resident of the city of Plainfield, in the county of Union, State of New Jersey, have invented certain new anduseful Tmprovements in Mixing and Discharging Apparatus for Cement and other Substances, of which the following is a specification.

The improvements relate to mechanism for mixing and discharging cement, grout and other substances, and more particularly to apparatus in which the cement or, the like is mined, ted, aquaiied, and placed for grouting, stucco work or other workv of similar character by the aid of air under pressure. lits objects are, among others, to produce a mechanism of this character in which the cement is mixed with sand or other aggregates, discharged at a uniform rate and placed with greater cl'liciency, thoroughness and certainty; and to so con struct and arrange the various parts that the entire operation is performed pneumatically. Other objects otthe invention will appear to those skilled in the art from the following description:

The improvements are illustrated. in the accompanying drawings, referred to herein, in which Figure l is a side elevation of a pneumatic mixing and discharging apparatus embodying the improvements; Fig. 2. is an end elevation of the same; Fig. 3 is a plan of the same with the upper part of the mixing chamber removed; Fig. 1 is a vertical section on the line as of Fig. 3 looking in the direction of the arrows.

The mixing chamber 1 is cylindrical in form and has a removable cover 2 which may be opened to permit the materials to be deposited therein. Air is supplied to this chamber through the pipe 3 and controlled by a valve a thereon, passing to the annular conduit 5 near the mouth 6 of the conical bottom 7 and thence through the channels 8 and orifices 9 and 10 into the interior oi the mixing chamber. The channels 8 and the orifices are located in the radial ribs '11, and the conical bottom 7 is secured to the casing 12 by machine ;:screws'13 passed through the horizontal flange 1a 1 extending outwardly from its upper edgebelng passed through the aperture in the Flange and threaded into 1 thegS-Etld casing} The lower-l edge'ofthe cylinder of the chamber 1 is held between the outer edges oi this flange and a shoulder 16 oi? the casing. The lower edges of the conical bottom 7 are thickened to allow space for the conduit 5 and strengthen them and to receive the inner end of the pipe 3, which communicates with the conduit 5 through a short conduit 15. In operation the valve 1 is opened and air under pressure admitted, and this passes through the orifices 9 and 10 into the bottom of the mass of materials in the mixing. chamber, passing up therethrough and out through the pipe 17 communicating with the upper part thereof,

after agitating and commingling the aggregates The pipe 17 communicates with a vertical tube 18 through a union 19 and the tube 18 extends downwardly to a point below the bottom of the mixing chamber where it is connected through an elbow 20 and pipe 21 with the discharge conduit 22, the ends of 21 and being connected by the sleeve 23. In this manner the air first utilized to mix the materials is passed around the mixing chamber to the discharge conduit at the bottom and there utilized to propel or convey the mixed materials to the place of application. A limited amount of water may be mixed with the materials in the mixing chamber or prior to their deposit therein, but it is preferred to aquafy them while they are passing through the discharge and conveying conduit 22.

Journaled in the casing 12 are a pair of rollers 2 1 and 25 connected by intermeshing gears 26 and 27 at their ends and having the medialportion of their parallel opposing surfaces directly beneath the discharge opening 6, so that the materials passing through said opening will come in contact therewith and pass between the rollers to the discharge chamber 28 in the lower part ofthe said casing. This passage of the materials .between the rollers is caused by their rotation in opposite directions, as indicated by the arrows (Fig. i), and provision is made for the adjustment or"? the space between the rollers to accommodate the character otthe materials. regulate the speed of discharge, and for other purposes. The materials fall through the discharge chamber 28 to the sleeve 23 where they are brought under the. influence of the blast oi? air from the pipe 21and propelled through the conduit 22. A. valve.

29 in the lower part of the discharge chamber may be used to restrict or shut off the discharge of materials.

In this manner the materials are permitted to pass to the rollers and from the rollers to the conveying conduit substantially by gravity, since the pressure caused by the air from the pipe 21 will be equal to or slightly less than the pressure in the mixing chamber, and the disturbance of the uniform mechanical discharge of the materials either by back pressure against the said discharge or undue forward pressure from the mixing chamber is thus prevented.

The rollers 24 and 25 are spaced by means or the wheel on the outer end of the rod 31, the inner end of the rod passing through a stniiing box and threaded in the internal collar 33 of the casing 12. The roller 25 is ournaled at its ends in the lower end of hangers depending within the casing 12 and mounted therein on suitable pivot bolts 34 fixed to the inside of the casing so as to oscillate, and the extreme inner end of the rod 31 passes through a slot in the bar 36 connectlng the two han ers. On either side -of the bar 36 the rod 31 has nuts 37 so that when the bar is rotated and moves lengthwise inwardly or outwardly these nuts will cause the hanger to move accordingly and move the roller 25 either toward or from the opposite roller 24 to adjust the space between them. As the teeth of the gears 26 and 27 are longer than usual this adjust ment will not separate them or affect their operation materially in any manner. The roller 24 is ournaled in the walls of the casing 12 in a fixed position.

The roller 24 is driven by means of an air motor 38 supplied with air under pressure through the branch pipe 39 controlled by the valve 40, and the air is supplied thereto, and to the pipe 3 through the compressed air conduit 41 connected with any suitable supply of compressed air. By this arrangement the valves 4 and 40 may be opened so as to establish a ratio between the supply of air for mixing and conveying and the supply of air for propelling the discharge rollers, and thereafter variations in the pressure of air supplied through the main 41 will have the same relative effect on the said parts of the mechanism. It will therefore be seen that an equilibrium and constant operating ratio between various parts of the apparatus is maintained under varying conditions. The shaft 42 of the roller 24 extends through the casing 12 and into the air motor and is the means whereby power is transmitted from the motor to the rollers.

The parts of the mechanism heretofore described are mounted on a truck 43 with suitable traction wheels 44 and 45 so that the machine may be moved about as desired.

An electric or other motor may be used in place of the air motor, and the construction and arrangement of other parts may be changed within certain limits, without departing from the scope of the invention, except as otherwise specified in the following claims.

It will also be apparent that other features adapted to cooperate with those herein described and shown may be employed, as, for instance, a connection between the mixing chamber and the source of COH'IPICSSOd air whereby the pressure may be maintained in the said chamber and the air conveyed therefrom through the outlet pipe, without passing through the materials. A branch pipe from the pipe 3 to the tube 18 controlled by a two-way valve, so that when the passage of air to the bottom of the mixing vessel is stopped the air will pass to the said tube 18 and vice versa will accomplish substantially the same result.

What I claim is:

1. In an apparatus of the character described, the combination of a chamber adapted to contain materials to be mixed, a conduit communicating with the lower part of said chamber and arranged to receive from a suitable supply and inject co1npressed air thereinto, a conduit leading from the upper part of said chamber and to a point below the outlet thereof, said chamber being provided with an outlet opening at its bottom, a conduit communicating between said outlet opening and said last named conduit, and means for controlling the discharge of materials from said chamber.

2. In an apparatus of the character dcscribed, the combination of a chamber adapted to contain materials to be mixed, a conduit communicating with said chamber and arranged to receive from a suitable supply and inject compressed air thereinto, a conduit leading from said chamber and to a point below the outlet thereof, said chamber being provided with an outlet opening at its bottom, a conduit con'nnunicating be tween said outlet opening and said last named conduit and out of communication with the first conduit, and means for controlling the discharge of materials from said chamber.

3. In an apparatus of the character described, the combination of a chamber adapted to contain materials to be mixed, a conduit communicating with said chamber and arranged to receive from a suitable supply and inject compressed air thereinto, a

conduit leading from said chamber and to a point below the outlet thereof, said chamber being provided with an outlet opening at its bottom, a conduit communicating between said outlet opening and said last named conduit, means for controlling the discharge of materials from said chamber, and means operated by the same source of air under pressure for actuating the discharge controlling means.

4:. The combination of a vessel constructed to receive and hold materials to be mixed, a compressed air supply conduit communicating therewith, a conduit for the escape of compressed air therefrom and out of com-- munication with the first conduit, said vessel having an outlet at its lower part, a con nection between said air escape conduit and said outlet, and a conduit for conveying materials away from said vessel also communicating therewith, and means between the part of said vessel in which materials are held and the outlet for controlling the escape of materials therefrom.

The combination of a vesselconstructed to receive and hold materials to be mixed, a compressed air supply conduit communicating therewith, a conduit for the escape of compressed air therefrom, said vessel having an outlet at its lower part, a connection between said air escape conduit and said outlet, and a conduit for conveying materials away from said vessel also communicating therewith, means between the part of said vessel in which materials are held and the outlet for controlling the escape of materials therefrom, and means operated by the same supply of compressed air for operating the said discharge controlling means.

6. The combination of a vessel constructed to receive and hold materials, said vessel provided with an inlet for air under pressure and a separate outlet for the same, and also provided with an outlet for materials, means for measuring and controlling the discharge of materials through the said outlet, and a connection between the outlet for air under pressure and the outlet for materials isolated from said inlet.

7. The herein described process of mixing and discharging sand and cement or similar mixtures and conveying the same to the place of application, which consists in placing the materials in a closed vessel, injecting compressed air into said vessel and into said materials, mixing the same, conveying the said air from the vessel to a point exterior thereto and discharging the materials from the vessel into a conveying conduit and there subjecting them to the action of said air taken from the vessel.

8. The herein described process of mixing and discharging sand and cement or similar mixtures and conveying the same to the place of application, which consists in placing the materials in a closed vessel, injecting compressed air into said vessel and into said materials, mixing the same, conveying the said air from the vessel to a point exterior thereto and discharging the materials from the vessel into a conveying conduit and regulating the said discharge by mechanical means, ausing the said materials to pass into a conveying conduit and there subjecting them to the action of the air taken from the vessel.

9. The combination with a vessel for mixing and discharging materials and having a contracted lower portion, of a series of conduits extending upwardly from the lower part of said vessel in the interior thereof and provided with orifices at different levels, said vessel having an air channel at its lower part connecting the said upwardly extending conduits and an inlet for compressed air communicating with said channel, and also an outlet for air at its upper part.

10. The combination with a vessel constructed to receive andhold materials to be mixed and having a contracted lower portion and an outlet in said lower portion, of a series of ribs extending radially upward from proximity to said outlet, said ribs having air channels therein and orifices communicating with the interior of the vessel, and said vessel having a laterally extending conduit near its outlet communicating with the channels of the said ribs and an inlet for compressed air communicating with the said laterally extending conduit.

Vitness my hand this 22nd day of December, 1916, at the city of New York, in the county and State of New York.

LEW'IS H. EIGHELBERGER

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