US1879385A - Separating disk - Google Patents

Description

Sept. 27, 1932. J MAYHEW 1,879,385

SEPARATING DISK Filed Oct. 22, 1930 Patented Sept. 27, 1932 Unirr. STATES PATENT OFFICE JOSEPH HOWARD MAYHEW, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO HART- GARTER COMPANY, OF PEORIA, ILLINOIS, A CORPORATION OF DELAWARE SEPARAT'ING DISK Application filed October 22, 1930. Serial No. 490,419.

My present invention relates to pocketed separating disks or plates of the. general character disclosed and broadly claimed in Letters Patent of the United States No. 1,364,247,

issued to Clarence W. Carter, asv inventor, of date January 4, 1921, and entitled Grain separator, and in the later Carter Patent No. 1,437,042 of November 28,1922, and similar to the disks disclosed in my copending application, Serial No. 266,430 filed March The disks employed in the commercial machines known to the trade as the Carter- Mayhew disk separator are provided wlth pocket-s adapted to receive and carry over certain kinds of grain or materials, such as wheat, and to reject certain other kinds of materials, such as oats.

Hitherto it has been the practice to cast 2 integral in gray iron the annular pocketed plates, the hubs and the connecting arms, and such structures have been highly efficient but have been heavy and the castings, because of weight and difiiculties in casting, have been quite expensive. Extending the use of these separating disks, grain separators en1- ploying these pocketed disks have been found to be highly efiicient and very desirable in connection with threshing machines and other portable machines, and when so used,

excessive weight is objectionable and it becomes highly important, therefore, to reduce the weight of the disks as much as possible, and obviously also, a reduced cost is desirable.

T have found that the above objects may be accomplished, that is, the weight may be reduced greatly under that of cast iron and the cost also reduced, by forming the pocketed annular plates or bodies of the disks of a w readily moldable non-metallic substance that is relatively light as compared with gray or cast iron. Various kinds of material, meeting the above specification, may be used, but

in practice, I have obtained the best results by employing a composition made up of asphalt, selite, fullers earth, molded into shape with the pockets therein while in plastic condition and made hard by pressure, or other- 59 wise. Materials such as bakelite or even unforce the disks from the shaft and hence are 6 preferably made from stamped sheet steel.

A commercial form of the improved separating disk is illustrated in the accompanying drawing wherein like characters indicate like parts throughout the several views. 05

Referring to the drawing: Fig. 1 is a side or face elevation showing one of the disks with a pressed metal hub and spoke-forming spider, some portions of the disk being broken away; I

Fig. 2 is an enlarged section taken on the line 22 of Fig. 1, some parts being broken away;

Fig. 3 is a fragmentary perspective showing a portion of the disk;

Fig. 4 is a detail in section on the line 44 of Fig. 1; and

Fig. 5 is an enlarged fragmentary section taken on the line 5-5 of Fig. 1.

The numeral 6 indicates the annular plateso like body portion of the disk, the same having pockets 7 in its opposite faces. The pockets 7 are of such size and so formed that they will pick up certain kinds of material but drop other kinds of material. For the sep- 8 aration of oats from wheat, said pockets 7 should be of a size and form that they will reject or quickly drop the oats, but will carry the wheat higher up or further over to a suitable point of discharge under rotation of the disk in the direction of the arrow marked thereon in Fig. 1.

i This annular disc body 6, as already indicated, is of baked non-metallic substance which, before baking, is plastic so that the pockets will be pressed or cast therein while in plastic condition and preferably while the disk is under quite high compression. The disk is preferably formed integral with oppositely projecting bevelled cam-acting lugs continued operation of the machine employ- 8 that serve to break up accumulations of material between a plurality of disks that are closely spaced on a. common shaft.

The metallic spider illustrated in the drawing, is made up of two duplicate or complemental pressed sheet metal members placed in reverse relation or face to face so as to make up the complete spider of light and hollow but strong construction. These pressed sheet metal members are stamped or pressed to form hollow hub portions 9, channel-shaped s oke-forming portions 1-0 and offset annular rim portions 11. The hubforming portions 9 are formed with angular shaft passages, the same as shown being formed hexagonal to fit the hexagonal portion 12 of a disk carrying-shaft 13. To preent the hard thin sheet steel of hub-forming portions 9 from cutting into the shaft under ing the disks, the walls of said hub-forming portions at their hexagonal shaft-engaging openings are bent inward at 14; so as to afford wide bearings against the shaft. The hubforming portions 9 between the spokes are provided with segmental flanges 9 the spokes 10 along their edges are formed with flanges 10 and the rim-forming portions 11 between the spokes are formed with flanges 11 When the two spider sections are secured together to form a complete spider, flanges 9 closely engage, flanges 10 of the spokes closely engage, and flanges 11 of the rim portions 1-1 closely engage. Therim-forming portions 11 embrace and clamp the inner edge of the annular disk 6 and are secured thereto preferably by rivets 15.

The spider described, while strong, will be very light and will have just enough flexibility to adapt itself to any slight irregularities in the disk. The complete disk including the hub spider affords a very light structure especially adapted for use where the elimination of weight is an important matter such, for example, as in travelling threshers or portable separators. The hub 0r spider structure, by the use of pressed metal members may be made strong but light. The pocketed disk body, however, of necessity must have considerable thickness and when made of cast iron or similar metal is necessarily a relatively heavy structure, but when made from a non-metallic substance such as stated, becomes a comparatively light structure and, moreover, the pockets can be more readily and accurately formed in this non-metallic composition material than they can in metal casting. Moreover, the non-metallic disk costsmuch less than even cast iron disks.

In the operation of a separating machine involving a plurality of these disks mounted on a common shaft, the openings between the spokes of the disk-carrying spider-afford passages through which the grain or material be-.

ing separated can be progressively fed from one disk to the other.

What I claim is:

1. A rotatable grain-separating disk adapted to be mounted upon a shaft, said disk comprising a pocketed ring-like relatively light separating plate of moulded plastic composition, an annular metal member fixed to and reinforcing the inner periphery of said ring-like plate, and a metallic. hub member adapted to be fastened to said shaft and connected to said reinforcing member, whereby to strengthen and support the body for rotation with said shaft.

2. A rotatable grain-separating disk comprising a pocketed annular plate of non-metallic relatively light material, a hub member for said plate comprising opposed sheet metal members providing a hollow hub portion and an annular channeled rim portion, said rim portion embracing the inner peripheral edge of said plate, and means securing said sheet metal members together and to said plate, whereby to strengthen and support said plate for rotation about a horizontal was.

In testimony whereof I afliX my signature.

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