US1862250A - Sampling machine - Google Patents

Description

June 7, 1932. L. ANDERSON 21,862,250

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L. ANDERSON SAMPLING MACHINE Filed Feb. 20, 1929 5 Sheets-Sheet 3 Patented June 7, 1932 LOUIS ANDERSON, OF EASTON, PENNSYLVANIA SAMPLING MACHINE Application filed February 20, 1929. Serial No. 341,515.

This invention relates to improvements in sampling mechanism, and while it has been devised specifically for sampling cement, it will be apparent from the following description that it is applicable to the sampling of various materials in powdered or similar form.

One of the objects of the invention is to provide slimpling mechanism adapted to continuously take a representative sample of cement or the like, from a moving stream of such material.

More specifically, my improved mecha- 'nism, for example, may be employed in a conveying line leading from the cement m1ll to storage, or it may be employed in the conduit used 1n feeding the raw material to the kilns or the like.

A further object is to furnish novel mechanism in the nature of an attachment which may be readily applied to existing conveying mechanism without materially altering the latter. My improved sampler may also be readily driven from any suitable moving part of the conveying mechanism with which it is employed, or it may be actuated by an independent motor, if found desirable.

A further object is to provide a sampling mechanism designed to simultaneously deliver identical representative samples to a plurality of containers;

With the foreg(m1g objects outlined and with other objects in view which will appear as the description proceeds, my invention consists in the novel features hereinafter described in detail, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

Referring to the drawings,

Fig. 1 is a perspective view of the feeding end of a standard type pumping mechanism employed for conveying powdered material such as cement, and showing my improved sampling mechanism attached thereto. Fig. 2 is a transverse vertical view of the same taken lengthwise of the sampling mechanism.

Fig. 3 is a similar view showing the sam pling device cooperating withthe conveyor employed in feeding raw material to a kiln or the like. a

Fig. 4 is a perspective view showing my sampler applied to. a chute located between screw conveyors of the type employed in feeding raw material to a kiln.

In the drawings, 4 designates a cylindrical screen which is part of the pumping system, and into which the finished cement is delivered by a screw conveyor 4:. In large cement plants, about 300 pounds-of cement is fed into this screen per hour, and the material, after screening, gravitates into a trough 5, along which it is fed by a screw conveyor 6 that delivers the same to storage.

From Fig. 2 it may be seen that the falling stream of cement is quite wide and extends, for instance, from the point A, to the point p B, and in order to continuously obtain a representative sample of this material, I arrangethe mouth 7 of my device across this stream. This mouth is preferably formed by an elongated slot positioned in the upper side of a relatively narrow tube 8, which extends entirely through the trough 5, between the screen and screw conveyor.

When my device is to be applied to the standard pumping mechanism, it is only necessary to cut aligned apertures in the opposite sides of the trough 5, and to insert the w tube 8 through these apertures, as shown. For the purpose of rigidly holding the tube in place, I may employ any suitable means, such as brackets 9, to which the tube may besecurely fastened. A plug 10 is secured in one end of the tube for closing that end, and the tube houses a relatively small conveying screw 11, which is provided at its outer end with a fast worm gear 12 that is located in a casing 13, and driven by a Worm W 14 on a shaft 15. Obviously, the latter may be driven by any suitable means, such for instance, as a motor, but I prefer to drive the same from a moving part of the pumping mechanism. To this end, the shaft 15 is operatively connected to the shaft of the conveyor 6, and due to the gear ratio between the parts 12 and 14, the sampler screw 11 is moved comparatively slow with respect to the shaft of the conveyor 6.

than the shaft 23.

It will be noted in Fig. 2 that the outer casing including the trough 5 and screw conveyor 6, forms conveying means for the material passing from the screen 4.

From the foregoing description, it will be appreciated that a relatively wide stream 0 powdered material, such as cement, is constantly' falling from the screen 4, into the conveyor trough 5, and as the mouth or slot 7 extends entirely across this stream, a representative sample will be constantly deposited in the tube 8. As the sampler screw 11 continuously moves within the tube, it will feed. the sample material toward the tube outlet 13, from which the material may be. discharged\to any suitable point.

In order that the manufacturer and a purchaser, for instance, ,ma simultaneously each receive equal arts 0 the sampled material, I have combined the outlet 16 with a bifurcated chute 17 the upper common end of which has a single opening to receive the material, and the branches functioning to deliver this material into a plurality of containers 18.

It will be ap reciated from the above that by myimprove mechanism, the best possible sample may be obtained, for the sampler not only takes material from one part of the falling stream, but from points all the way across the stream,and as the screw 11 cont'nuously rotates, obviously the sample deliv red will be representative.

I In the embodiment of the invention illustrated in Fig. 3, the sampler is shown applied to the bottom of a conve or trough or conduit 20, which, for examp e, may be a trou h through which raw material is fed toward t e kiln by a screw conveyor 21. In this modification, a slot may be cut transversely in the bottom of the trough, and the tube 8 of the sampler may be extended into this slot. Of course, the edges of the slot will be cut to conform with the external surface of the tube, in order to prevent any leakage of the material around e tube. This form of the invention operates in the same manner as the embodiment illustrated in Figs. 1 and 2, and in this construction, the drive shaft 22 of the sampler is operatively connected with the shaft 23 of the screw, and reduction gearing in the casing 24 causes the sampler screw 1 11" to continuously rotate at a slower speed Instead of arranging the sampler tube in the bottom of the conveyor trough, as shown in Fig. 3, it may be placed in the conduit, tube or chute (Fig. 4) which conducts the raw material from an upper conveyor 31 to a lower one 32. Like in the other applicaj tions of the invention, the drive shaft 33 of the sampler is operatively connected to the shaft 34 of one of the screw conveyors, and due to the reduction gearing arranged in the casing 35, the sampler screw will be rotated at less speed than the shaft 33.

I have only illustrated a few applications of the invention, and it will be manifest to those skilled in the art that sampling mechanism in accordance with my invention, may be employed in an environment where it is suitable, and also t at it may be used to samgle any material to which it is applicable.

bviously, it is es cially useful in an place where it is desira le to constantly o tain a representative sample of a moving stream of powdered material or the like.

From the foregoing it is believed that the construction, operation and advantages of the invention may be readily understood, and I am aware that changes may be made in the details disclosed, .without departin from the spirit of the invention, as expresse in the claims. I

What I claim and desire to secure by Letters Patent is:

1. A method of obtaining a representative sample from a relatively wide moving stream of powdered material or the like comprising continuously gathering a small 'amountof the material simultaneously from a multiplicity of points along a line extending longitudinally across the stream and normal to the moving direction of the stream, moving the gathered material in a path extending normal to the moving direction of the stream,

and delivering the sample at one end of said path at a point somewhat removed from the stream.

2. A method of sampling a relatively wide moving stream of powderri material or the like comprising continuo sly gathering a small amount of material from points along a line extending entirely across the stream in the direction of its longest dimension and normal to the direction of the movement of the stream, moving the gathered material along said line, and continuously deliverin the gathered material at a point remove from the stream.

3. .Mechanism for sampling material in a flowing stream, including, a relatively wide conduit through which the stream flows, a stationary tube extending across said conduit and rovided with a constantly open elongate slot in its top to permit the material from substantially all points across the stream to enter the tube, and means for continuously feeding the admitted material along the tube and 'for discharging the material from said tube.

4. Sampling mechanism for powdered material or the like, including a relatively wide conduit through which the material flows, a stationary hollow member extending across said conduit and havin an elongated mouth of a length substantially equal to the width of said conduit, and means for continuously feeding material admitted through said mouth along the member and for discharging the same from said member.

5. Sampling mechanism for powdered-material or the like, including a relatively wide conduit through which the material flows, a

stationary tube extending across said conduit and provided on its upper side with an elongated slot of a length substantially equal to the width of the conduit to admit material to the tube, a screw conveyor arranged within the tube, and means for continuously rotating said conveyor.

6. In mechanism of the character described,

conveying means adapted to conduct a moving stream of powdered material or the like,

said conveying means including a movable conveyor, a hollow member extending transversely substantially entirely across the conveying means and having an elongated mouth 2 to receive material from substantially entirely across the moving stream, a conveyor in said hollow member, and means for continuously driving the last mentioned conveyor from the first mentioned conveyor, and at less speed than the latter.

7 In mechanism of the character described, conveying means adapted to conduct a flowing stream of powdered material and provided with a movable conveyor, a relatively narrow tube extending transversely substantially entirely across the conveying means and having an elongated stationary mouth adapted to receive material from substantially entirely across the moving stream, a conveyor screw in said tube, and means for continuously driving the screw from saidv conveyor andat substantially less speed than the latter.

8. The combination with conveying means adapted to conduct a continuously moving stream of powdered material or the like, and provided with a continuously movable conveyor, of a sampler tube extending transversely substantially entirely across the contionary mouth arranged to continuously receive a part of the material along a line extending substantially entirely across the moving stream, a conveyor screw arranged within the tube, and means for continuously rotating said screw from the conveyorand at substantially less speed than the latter.

9. A sampler for use with powdered material or the like, including a relativel wide conduit through which the material ows, a relatively narrow tube extending substantially entirely across said conduit and having an elongated slot of substantially the same length as the width of the conduit, means closing one end of the tube, a conveyor screw rotatably mounted in the tube, a drive shaft, and reduction gearing operatively connecting said shaft to the conveyor screw.

10. A, sampler for use with powdered Inaterial or the like, including a relatively wide conduit through which the material flows, a

relatively narrow tube extending substantially entirely across said conduit and having an elongated slot of substantially the same length as the width of the conduit, a

specification.

LOUIS ANDERSON.

veying means, and having an elongated sta-

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