US1785585A - Hopper feeding device - Google Patents

Description

Dec. 16, 1930. E. HJHUMBERSTONQE ETAL 1,735,535

HOPPER FEEDING DEVICE Filed Dec. 23, 1926 v [Ill/Ill!!! 60 f INVENTOR. a 1 51:44,.

ATTORNEY.

I ERNEST H. HUIJIBERSTONE AND HARRY R. WELCH, OF COLUMBUS, OHIO, ASSIGNORS.

P tented Dec. 16, 1930- i" STATES PATENT oFFlcE TO THE MARBLE CLIFF QUARRIES COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO j HOPPER FEEDING .nnvrcn j Application filed December 23, 1926. Serial No. 156,701.

devices, particularly of the rotary type.

In the art the use of hopper feeding.

' devices consisting of a cylindrical casing within which a shaft having compartment pockets formed as segments of the cylindrical casing, are old and well known. Our invention employs as a mechanical feeder a rotary shaft carrying a set of segment shaped compartments, each one of which feeds material from a receiving side of a casing to a discharge-side. The improvements which we have made relate more to the clearance which is provided in the casing, to the method of regulating the flow of material to the rotary feeder, and to the position into which the material to be fed is exposed to the compartment pockets, than to any invention inherent in the shapeof the rotary feeder.

It is the object of our invention to provide, for conducting such materials, as

' crushed stone, lime, ore and other kinds of powdered, granulated or semi-plastic material, a leak-proof feeding device which will effectively resist blocking by nails, spikes and other foreign material'which we have found to be a constant source of trouble with other types of feeders. I

Referringto the drawings in which we have illustrated a preferred assembly Figure 1 is a side elevation of the feeder.

Figure 2 is an end elevation of the assem- V bly shown 1n Flgure 1.

Figure 3 is a perspective view of the internal compartment feeder.

v Figure 4,113 a sectional view taken along the lines 1-4 in Figure 1.' V

The casing which is generally indicated at 40 1 may be of desired shape, providing it has a compartment such as is indicated at 2 therein. The casing which'we have shown has a flanged portion 3 for attachment to a feeding chute, and a flanged portion 4 for attachment 4:, to a delivery chute. The casing has side walls 5 which we have shown with orifices 6 over which plates 7 may be riveted or welded. The plates 7 are preferably mounted on the outside of the side walls 5, so that an annular 59 recess is provided for housing the rotary feedingdevice. The feeding device is composed of. a central rotatable axial shaft 8 which may be'squared to engage a squared orifice 9 extending through the rotor. The rotor has a central hub'portion 10 with disclike sides llwhich fit within the recess in the casing, so that no capacity of the compartment pockets12 will be wasted, and so that there WillbG no opportunity for leakage, and so that no annular spaceswill be formed which would be likelyto trap foreign matter passing through the feeder, and thus block its operation. Blades 18 extending radially from the central hub, form the compartment pockets.

The rotor vanes 13 are of such length that a very small opening 1a is left between the outeredge of each blade and the bottom wall 20 of the compartment 2. The casing at the top; however, provides considerable clearance, so that material carried in the'po'ckets is not likely to strike the upper wall of the ca sing: In order to better illustrate the principle involved, we have shown an opening 15 in the top wall of the casing. \Ve will ordinarily provide a cover for this opening, but such a cover is not essential to the operation of the feeder. Extending preferably in approximately the position shown in Figure 1, we have indicated a deflecting plate 16 which may be moved laterally into the lower compartment 2.

In Figure 1 we have indicated the position in which crushed stone or lime will appear in thefeeder casing. We have indicated the compartments of the feeder by the letters a, b, c, and d respectively, beginning at the start of the filling operation. The direction of rotation of the feeder is counterclockwise.

The compartment 64 will not fill during its first quarter revolution, the material being compartment (1 is empty having discharged its load-by gravity into the discharge portion of the casing. I 1 V a While we have shown a, rotor havlng four compartments, it will be immaterial if a v greater or lesser number of compartments is PIOVldEd; In some feeders of the same general type, it is possible to regulate the amount 7 the rotor. In our novel type the capacity can fed by the capacity of the compartment,jas

the feeder is limited bythe uppercasing wall,

making a fairly tight oint with the vanes of be controlled by measuring; or weighing the amount which comes over 1n each compartmentwith the gate "at a certain position.

Then by jcalibrating'the gate-as indicated at 16a, a measured quantity maybe fed, depend the supply H heldfback by the gate 16.

ing somewhat on the column 'of Having thus described our invention, what is 7 we clalm as new and desire to secure by LettersPatent, is If i y A A feeding device comprising a casing with offset side walls for seating the sides of a q feeding device, and a feeding device rotatably mounted in said casing, said device having-disc-like sides with a hub extending across between said sides, and vanes extend-j ing radially'from said hub subdividing said v device into feeding compartments, said disc-.

like sides "extending into said offset side ,wall's, and said casing forming a seal against the outer edges of vanes in the lowermost position thereof, and having clearance at: the

uppermostposition of the vanes, and a plate 7 extending diagonally into said casing tangentially to the periphery of said disc-like sides for diverting material from a direct gravity drop into said compartments, said plate being extendible to carry material within said'casing and into a compartment therein having 7 a bottom extending substantially in -hori-.

zontal alignment with the lowermost portion of said feeding device.

ERNEST H. UHUMBERSTONEV; HARRY R. WELOH. 7

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