US1344832A - Shredding and blending mechanism for feed - Google Patents

Description

R. A. STUBBS.

SHREDDING AND BLEND'ING MECHANISM FOR FEED.

APPLICATION FILED MAY 1. 1915.

, 1 344 8 32 I Patented June 29, 1920.

Iii 1.

UNITED STATES PATENT OFFICE.

ROBERT A. sw ms, or DALLAS, TEXAS, ASSIGNOR or rrmnn-rouarns TO G. w.

GRISWOLLD, or DALLAS, TEXAS.

SHREDDING AND BLENDING MECHANISM FOR FEED.

Specification of Letters Patent.

Patented June 29,1920.

Application filed May 1, 1915. Serial No. 25,175.

To all whom it may concern:

Be it known that I, ROBERT A. STUBBs, a citizen of the United States, residing at Dallas, in the county of Dallas and State of Texas, have invented certain new and useful Improvements in Shredding and Blending Mechanism for Feed, of which the following is a specification.

My invention has relation to a shredding and blending mechanism for hay, straw or similar feed and for all loose more or less fibrous materials and in such connection it relates more particularly to the construction and arrangement of the shredding teeth, the cylinder carrying the same and the breast or concave cooperating therewith.

In a companion application filed of even date herewith under Serial No. 25174;, I have described and claimed broadly certain related and cooperating mechanisms constituting a machine for shredding and blending loose materials. While such a machine would require feeding means, compacting means, sheeting mechanism and shredding means to perform the main purposes for which it was designed namely the cutting, shredding and blending of loose material such as feed or grain, it is obvious that various forms of shredding mechanism might be devised and hence in said application a shredding mechanism broadly was described and claimed. Again it is obvious that the shredding mechanism illustrated in said application and forming the subject matter of this present application might be used alone as a complete machine or might be combined with other mechanisms and still perform its peculiar combined functions of cuttin splitting and shredding and blending w1icl1 combined functions of the machine or mechanism I consider as of my invention without regard to the peculiar form or mechanical appearance of the machine elements entering into the mechanism for performing the said combined functions.

The principal objects of my present invention are: First to provide a shredding cylinder whereon shredding teeth of peculiar construction are arranged spirally and cooperate with a concave or breast in performing the transverse cutting, longitudinal splitting and lateral blending of the ma terial;

Second, to provide in such a mechanism a shredding cylinder built up of a series of obliquely set sections each section carrying a series of cutting and splitting teeth and all the sections are rigidly assembled together to form a cylinder from the surface of which the teeth project spirally;

Third, to provide in such a mechanism, a tooth having a splitting point upwardly beveled to form side cutting edges midway of the front or point and the back of the tooth, and

Fourth, to provide in such a mechanism, a breast or concave consisting of a series of overlapping slats arranged so that an edge of each slat projects tangentially to the periphery of the shredding cylinder to cooperate with the point and side faces of the teeth in the cutting and splitting of the material.

The nature and scope of my invention will be more fully understood from the following description taken in connection with the accompanying drawings forming part hereof, in which' Figure 1, is a front elevational view of a shredding cylinder and breast embodying main features of my invention, certain sections of the toothed cylinder being removed to disclose the breast andcertain parts being sectioned to more clearly illustrate the invention.

v Fig. 2, is a cross-sectional view enlarged to illustrate the cooperation of breast and cylinder and to more clearly illustrate the construction and arrangement of the parts.

Fig. 3, is a detail, sectional view taken on line a, a ofFig. 2 to illustrate the adjustment of the breast or concave.

Fig. 4k, is a detail, sectional view, taken on line b, b of Fig. 2.

Fig. 5, is a perspective view illustrating diagrammatically the connection between the teeth and anobliquely set section of the cylinder and Big. 6, is a detail view illustrating the tongue and groove interlocking of the obliquely set sections of said cylinder.

Referring to the drawings 1 represents the shaft and 2 the driving pulley for the shredding cylinder. The cylinder is made up of end collars 3 and 4 between which obliquely set spiders 51 are confined. One end flange 3 is secured directly to the shaft by means of the collar 6 integral with flange 3 whereas the other flange 4 is adjustable longitudinally on shaft 1 being held to place by the nut 7 arranged to be advanced or retracted upon a screw threaded portion of the end of said shaft 1. Each fiange has an inner face oblique to the plane of the shaft and the obliquity of the respective flanges is diametrically opposite to that of the other flange so that when arranged upon the shaft they constitute the ends of a true or substantially true cylinder. The body of this cylinder is made up of the series of the obliquely set spiders 5 each of which has an outer pe riphery 6 revolving in a plane obliquely of the axis of the cylinder. In the preferred construction the periphery or annulus 6 is connected by radiating arms 7 with a central hub 8 arranged to slide upon shaft 1 and each hub 8 has on one face an opening 9 and on the opposite face an interlocking offset 10 so that in the assemblage of the sections on the shaft, the sections and the two flanges 3' and 1- are all interlocked by a tongue and groove connection as clearly illustrated in Fig. 6.

Each periphery or annulus 6 of the spiders, has on one face (theiright face in Fig. 1) or side an annular groove 11 concentric with the periphery of the annulus (3 and leading from this groove 11 are a series of recesses 12 angularly arranged. These recesses 12 are cut clear through the periphcry or annulus 6. In each of the compartments formed by the combined groove 11 and a recess 12 is placed the shredding tooth. Each tooth has a base 13 closely fitting in the groove 11 and a body 14 inclined forwardly from said base 13 and closely fitting in the recess 12. Each tooth has a peculiarly formed cutting edge and splitting point, a tooth projecting beyond the annulus 6, the point 15 being at the lower forward end of the projecting portions of the tooth and the cutting edges 16 on each side of said projecting portion midway between the point 15 and the back 17 of the tooth. To secure the point 15 and the cutting edges 16 the projecting portion of the tooth is upwardly beveled on either side of the medial line of the tooth.

When the sections 5 are assembled a flat unrecessed and ungrooved face of one section lies upon the grooved and recessed portion of an, adjacent section to confine the teeth in said grooved and recessed portion of said section as clearly illustrated in Fig. 1.

The teeth of the cylinder when all sections 5 are assembled and locked together between the end flanges 3 and 4: are arranged in a path which is'spirally. disposed with respect to the axis of the cylinder.

The cylinder thus constructed and arranged is adapted to cooperate with a breast or concave of any desired'form but in practice I have found that the particular form and construction illustrated in Figs. 1 and 2 of the drawings is preferable.

The breast or concave consists of a series of overlapping slats 17 each fixed at its end in a. curved bracket 18 and when so fixed the upper edge 19 of each slat projects toward the toothed periphery of the shredding cylinder so that a circle drawn through said edges 19 will be substantially concentric with a circle drawn through the splitting points 15 of said teeth. The two curved brackets 18 are united by transverse stay bars 19 and the frame thus formed is pivotally suspended from the rod 20 supported by the frame work of the machine. The free end of each bracket 18 is provided with a rod 21 traversing the slots 22 in the frame of the machine. When the nut 23 of the rod 21 is loosened, the adjusting movement of frame and slats toward or away from the teeth of the shredding cylinder is permitted.

In the operation of the machine material is presented to the periphery of the shredding cylinder by the jaws 24: and as the cylinder revolves the teeth traverse the material from end to end, each tooth cutting the material crosswise and the point of each toot-h splitting the material endwise. The spiral arrangement of the teeth on the cylinder insures of a lateral movement of the shredded pieces and hence a blending of the material as it passes through the shredding operation.

Having thus described the nature and objects of my invention what I claim as new and desire to secure by Letters Patent, is,-

A shredding cylinder comprising a series of connected spiders each having a peripheral annulus with oblique contact faces and each annulus having on one of its sides an annular groove with connected recesses opening at the periphery of the" annulus and shredding teeth abutting at their inner ends against the inner wall of the groove and extending through said recesses and projecting beyond the periphery of the said spiders.

In testimony whereof I have signed my name to this specification.

ROBERT A. STUBBS.

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