US1288025A - Means for discharging-pulverized material from bins, &c. - Google Patents

Description

J. E. KENNEDY.

MEANS FOR DISCHARGING PULVERIZED MATERIAL FROM B|N5,&c.

I APPLICATION FILED MAR. 16. I91]- 1,288,025. Patented Dec. 17', 1918.

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MEANS FOR DISCHARGING PULVERIZED MATERIAL FROM BINS, &o.

Specification of Letters Patent.

Patented Dec. 17, 1918.

Application filed Kai-ch 16. 19 17. Serial No. 155,307.

To all whom z't-may concern:

Be it known that I, JOSEPH E. KENNEDY, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Means for Discharging Pulverized Material from Bins, &c., of which the following is a specification.

The object of my invention is to insure an even, uniform feed, both as to quantity and pressure, of reduced or comminuted material from a storage bin or similar receptacle irrespective of the mass of material contained in said holder. Difficulty has heretofore been experienced in controlling and counteracting the pressure exerted by the material in a storage receptacle of this character, especially when the same is full, or approximately so, because under such conditions the excess of weight tends constantly to force the material through the exit much more rapidly than is desirable, whereas when the level of material in the bin is low, the pressure will obviously be materially reduced, even possibly below that suiiicient to effect a continuous flow in adequate quantity.

I obviate this difiiculty by my invention which consists essentially in interposing be tween the exit and the bin a discharge cham-- ber housing rotatable screw feed mechanism which receives the pulverized material from apertures in the floor of the bin and trans fers it to said exit,the weight of material in the bin being sustained by the floor plate thereof, which also constitutes the top of the said discharge chamber, and the screw feed positively conveying the material to the exit at an even speed and uniform pressure, all as hereinafter more fully set forth.

In the accompanying drawings,

Figure 1, is an elevation of the lower portion of a bin or container for disintegrated material provided with my means for discharging the contents thereof;

Fig. 2, is a horizontal section taken upon plane of line 22, Fig. 1;

Fig. 3, is a horizontal section taken upon plane of line 3*3, Fig. 1;

Fig. 4, is a vertical section taken upon plane of line 4l, Fig. 2.

The convergent lower side walls 6, b, of the bin or similar receptacle B, for holding and dispensing pulverized material, cause the descent of such material by gravity to the floor plate I), which also constitutes the top plate of the discharge feed chamber (1, in which is situated the positive feed screw mechanism by which the pulverized material is conveyed from the apertures b b (Fig. 2) in said floor plate Z), to the exit c, in the bottom plate 03, of the discharge chamber d,-said exit 0, being provided with a spout or chute e, by which the discharged material may be delivered to auxiliary apparatus of various kinds and for various purposes.

The positive screw feed mechanism consists preferably of two parallel screw conveyers 0, c, of like pitch and inclination. These extend on either side of the exit 6, and convey the pulverized material which descends through the apertures N, in the plate 5, in o posite directions to said exit 6. If the latter liecomes clogged for any reason the screw conveyers c, a, simply cause the material in the discharge chamber (3, to circulate from one end thereof to the other, back and forth, until the obstruction abates,-the feed to the exitvc,-thus being continuous regardless of the condition of the latter, and the screw oonveyers c, c, taking no more from the bin apertures 6 12 than they can dispose of. Furthermore this provision for circulation of material within the discharge chamber d, relieves the pres sure and prevents the crowding and forcing of material through the exit 0, when not disposed of ratus.

The bin apertures 6 6 are of a combined area aggregating approximately that of the exit e, so that the floor plate 6, which may be designated the pressure relief plate, sustains the major part of the weight of the mass of comminuted material in the receptacle B, thereby obviating undue compactness and congestion, and affording the least possible degree of resistance to the operation of the oonveyers 0, c, and permitting them to feed the material to the exit e, in relatively loose, uniform condition, which is a pre-requisite for effective service in the auxiliary apparatus.

The bin apertures 6 6 are by preference out of coincidence with the exit 6, so that there is no possibility of the contents of the bin exercising direct pressure on the material ejected through said exit 6.

The screw oonveyers may be mounted and rotated in opposite directions by any suitable means. By way of illustration in the promptly by the auxiliary appadrawings they are connected by intermeshing gears g, g, and driven by a pulley p.

It is to be noted that by my method of efferting the discharge of the comminuted material the latter is withdrawn from the bin only as required, and that while the feed to the exit w, is positive in the sense that material is always presented thereto, still it is not absolutely imperative in that undue resistance to exit will be automatially met and remedied by the continuous circulation of the material in the discharge hamher 1/. by means of the screw conveyers c, 0. Furthermore, there can be no flooding of the material into the discharge chamber. nor passage therethrough faster or slower than at the speed and quantity prescribed by the screw conveyers c, 0, so that a definite amount et' material is abstracted from the hopper and ejected from the dis charge rhamber at an even speed. which is an important factor in various arts in which my system of delivering comniinuted material may be employed.

1 have herein shown and described my discharge chamber (Z, as situated immediately below the pressure relief floor plate Leashes 7), of the bin, although I do not limit my self thereto, sinte communication between the lower part of the bin and said discharge chamber (Z, is the essential feature in this respect, in conjunction with the interposition of a pressure relief plate through which such eomnmnieation is effected.

What I claim as my invention and desire to secure by Letters Patent is,

Means for discharging pulverized material t'rom bins, comprising a floor therefor consisting of a pressure relief plate formed with openings, a discharge rhan'iber underneath said relief plate formed with a discharge spout misregistering or out of coincidence with the said openings in the relief plate above, parallel screw eonveyers threaded in the same direction positioned in said discharge chamber, and means for rotating said screw conveyers in opposite directions, whereby a circulation of material in the discharge chamber is eifected, for the purpose described.

JOSEPH E. KENNEDY.

Witnesses MARGARET L. KINDT, MARGARET M. NOLAN.

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