US1039610A - Feeding device for grinding-mills. - Google Patents

Description

A. W. STRAUB.

FEEDING DEVICE FOR GRINDING MILLS.

APPLICATION FILED DEC. 9, 1910.

Patented Sept. 24, 1912.

2 SHEETS-SHEET 1.

H 171:570036 WEE M,

gun W a-Magyar 1 A. W. STRAUB.

FEEDING DEVICE FOR GRINDING MILLS.

APPLICATION FILED DEC. 9, 1910.

2 SHEETS-11211! 2.

COLUMBIA PLANOGRAPN CO; WASHINGTON. D. c.

Patented Sept. 24, 1912.

AMBROSE W. STRAUB, 0F PHILADELPHIA, PENNSYLVANIA.

FEEDING DEVICE FOR GRINDING-MILLS.

Specification of Letters Patent.

Patented Sept. 24, 1912.

Application filed December 9, 1910. Serial No. 596,525.

To all whom it may concern:

Be it known that I, Aimnosn W. STRAUB, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Feeding Devices for Grinding-Mills, of which the following is a specification.

One object of my invention is to provide a structure particularly adapted for crushing or cutting and feeding such material as whole ears of corn with the husks to a pair of grinding disks or cutters; it being especially desired that the construction of parts shall be such as to prevent choking or clogging of the machine.

Another object of my invention is to provide a combined cutting and feeding device for mill crushers which shall first cut or crush the material delivered by a hopper and shall thereafter force this material between a pair of relatively movable grinding surfaces; the arrangement being such that one portion of said device shall hold or force a body of material toward the grinding disks until another portion thereof forces a succeeding mass of material into said grinding members.

I also desire to provide a machine of the character described with novel means for preventing revolution of the material to be ground which shall include a section replaceable when worn.

These objects and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying drawings, in which r Figure 1, is a vertical section of a feed mill crusher showing my invention as applied thereto; Figs. 2 and 3 are vertical sections on the lines aa and bb, Fig. 1; Fig. 4 is a plan of the machine shown, in Fig. 1, the feeding cutter being removed; Fig. 5, is a perspective view of the cutting and feeding device invented by me; Fig. 6, is an end elevation of the device illustrated in Fig. 5; Fig. 7, is an enlarged fragmentary elevation of the active face of one of the grinding disks, and Fig. 8, is an enlarged vertical section of a portion of the disk shown in Fig.

In the above drawings, 1 represents portions of a supporting frame structure which, in addition to carrying bearings 2 and 3 for a shaft 4, supports a hopper 5 having a casing 6 for the reception of grinding disks hereafter described in detail. The bottom of the hopper is made in substantially semicylindrical form concentric with the shaft 4 and has removably mounted in it a feeding cutter or crusher 7 which is keyed or otherwise suitably fixed to the shaft 4. The interior surface of the hopper bottom has one or more slightly curved elongated teeth or ribs extending for the greater part of its length and adjacent the outlet opening 10 of said hopper I provide in the bottom thereof a removable plate 6 having a number of independent teeth or ribs as shown. This plate is caused to conform to the generally curved interior surface of the hopper bottom in which it is set; being removably held in place by screws or bolts.

The grinding casing 6 has an outlet 8 situated at any suitable point and is made in two separable parts having within it a plate 9 fixed t0 the shaft 4 and carrying a grinding disk 11 on its face adjacent the outlet 10 of the hopper. A second grinding disk 12 is mounted parallel with and adjacent to the first disk 11. so as to co-act therewith, and for supporting it I provide a tramming ring 12 carried by the tramming ring seat 12". This latter has trunnions 13 confined between the two parts of said casing and also has two lugs 12 fitting recesses in the edge of the tramming ring so as to prevent revolution thereof. The central opening of the tramming ring seat is flanged and interiorly toothed, while the exterior surface of said flange is concaved to provide a rocking surface for the support of the tramming ring which has a convex surface co-acting with the rocking surface to permit automatic adjustment of the grinding disk 12 under operating conditions.

The feeding cutter or crusher, although it may have more than two blades, is preferably constructed as shown and consists of a cylindrical sleeve or body 14; on which are mounted two elongated and preferably helical, cutter or crusher blades 14* having a steep pitch and but a relatively slight inclination to the general line of the sleeve let. The surface of the advancing face of each of the blades is preferably made as shown, with all. of its elements lying in a single plane so that it presents a relatively extended plane surface at one end of the sleeve l-ft and a relatively narrow, slightly overhung face at the other. Forming a continuation of this overhung end of each blade, immediately adjacent the outlet 10 of the hopper, is a relatively short and small pitched blade section serving prin'larily as a conveyer element; its function being to receive the material crushed and cut by the main portion ll of the blade and forcibly deliver this through the outlet of the hopper into the space between the grinding disks 1.1 and 12. It will be noted that with this construction the surface of the sleeve is between the two blades is altogether unobstructed and that the conveying portion of each blade may be described formed by abruptly bending the end thereof adjacent the hopper outlet at an angle to the remaining main portion so that it acts to force material out of the hopper. It will be noted further that while the outer edge of the main portion 14 of each blade is relatively sharp, the similar part of the conveying section 15 is wide and flat.

Under operating conditions the material to be ground, such as whole ears of corn including husks, etc., is delivered to the hopper, and revolution of the shaft 4 by some suitable source of power, causes the cutting edge of the main portion l l of each blade to engage the various portions of material, co-acting with the lower portion of one side and the teeth or ribs in the bottom of the hopper to cut and crush this material, which is gradually fed toward the outlet end of the hopper owing to the slight inclination of the said portions 1 1 of the blade. ,lVhen it reaches the conveying section 15 of the feeding cutter, this latter, after moving it in engagement with the toothed plate 6, so as to still further outand crush it, forcibly as well as continuously delivers it through the toothed orifice of the tramming ring seat into the space between the disks 1.1 and 12. Owing to the unimpeded passageway between the blades on the sleeve 14;, the material is acted on without being permitted to choke or clog the machine, since any husks or shreds, being held from revolving by the ribs or teeth in the hopper, are sooner or later cut by the portions 14 of the blades. Owing to the accumulation of material in the space between the grinding disks 11. and 12., such material is forced continuously out between them, during which process it is shredded and finally ground to an extent dependent upon the adjustment of the machine. From the peripheries of the grinding disks the ground material then flows intothe main part of the casing G whence it escapes through the opening 8 into a suitable container or receptacle. Owing to the peculiar mounting of the tramming ring and the grinding disk 12 carried thereby, these are at all times free to automatically rock or swing to a limited extent upon the trannning ring seat so as to adjust said disk to properly cooperate with the disk 11 in grinding the material operated on.

While I have described the hopper and flanged opening of the tramming ring seat as provided with teeth, it will be noted that these projections may act as blades or abutments without departing from my invention.

I claim 1. The combination of a hopper; a feeding cutter mounted therein, said cutter having a body provided with an integral blade formed with a cutting portion and a conveying portion continuous therewith; and means for turning said feeding cutter, there being two independent series of teeth in the hopper placed to cooperate respectively with said two portions of the cutter.

2. The combination of a hopper; a feeding cutter therein formed with a body portion; an integral blade having an elongated cutting portion inclined at a relatively slight angle to the line of the body, and a relatively short conveying portion extending abruptly from one end of the cutting portion; with means for turning the cutter.

3. The combination of a hopper; a feeding cutter therein formed with a substantially cylindrical body having a plurality of integral blades, each of said blades having a relatively elongated sharp edged portion and a relatively short conveying portion extending at an abrupt angle to the first portion; with means for turning said cutter.

at. The combination of a hopper; a feeding cutter rotatably mounted therein formed with an elongated substantially cylindrical body having an integral blade made in two helical portions; one of said portions having a relatively sharp cutting edge and a plane advancing face, and the other portion extending at an abrupt angle to and forming a continuation of one end of the cutting portion to constitute a conveyor; with means for turning said cutter.

5. A new article of manufacture; a feeding cutter consisting of a substantially cylindrical body portion with an integral blade mounted thereon; said blade consisting of a relatively sharp edged cutting portion extending at a relatively slight angle to the general line of the body and having a relatively short conveying portion extending at a relatively abruptangle to the cutting portion from one end thereof.

6. The combination of a hopper; a feeding cutter mounted therein, said cutter hav- In testimony whereof, I have signed my mg a body provided wlth a blade formed name to this speclficatlon, 1n the presence with a cutting and a conveylng portion; of tWo subscrlbing wltnesses.

means for turning said feeding cutter; and AMBROSE W. STRAUB. a removable toothed plate in the hopper WVitnesses:

placed to cooperate With the conveying por- WVILLIAM E. BRADLEY,

tion of the cutter blade. WM. A. BARR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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