US1225449A - Feed-mill. - Google Patents

Description

H. G. McCULLOCH.

FEED MILL.

APPLICATION FILED FEB. 9. 1914. RENEWED MAR. 1.1911.

1,225,4%9@ Patented May 8,1917.

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H. GQMcCULLOCH.

FEED MILL. APPLICATION FILED FEB. 9,1914 RENEWED MAR. 1,1917.

Patented May 8, 1917.

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FEED MILL.

APPLICATION FILED FEB. 9. 1914. RENEWED MAR. 1.1917.

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UNITED TATEg PATENT @FFfQlt.

HARRY G. MGCULLOOH, OF FREEPORT, ILLINOIS, AS-SIGNOB, BY lVIESNE ASSIGNMENTS, TO STOVER MANUFACTURING AND ENGINE COMPANY, OF FEEEPORT, ILLINOIS, A

CORPORATION OF ILLINOIS.

FEED-MILL.

Patented May 8, 1917.

Application filed February 9, 1914, Serial No. 817,396. Renewed March 1, 1917. Serial No. 151,814.

To ((2 Z whom it may concern Be it known that I, HARRY G. MGCUL- LOCH, residing at Frecport, in the county of Stephenson and State of Illinois, have invented certain new and useful Improvements in Feed-Mills, of which the following is a specification.

My invention relates to certain improvements in feed grinders of the class that are made to grind all sorts of materials in ordi nary use for feeding stock. Such a variety of feed is ground in a machine of this class that it is extremely difficult to make the operation satisfactory in all its various uses, and in grinding the numerous combinations of feed from the largest to the smallest, it has been found extremely difficult to com bine in a single machine the maximum capacity and the greatest efficiency in grinding to the required degree of fineness and evenness.

It is my purpose to so combine and arrange the various devices used in grinders of this class that they may coact with the greatest possible degree of eflicien'cy and afford a machine with the greatest capacity consistent with satisfactory operation.

To such end my invention consists in the novel construction, arrangement and combination of the various elements herein shown and described the essential characteristics of which are clearly defined in the claims at the end of this specification.

In the drawings, Figure 1 is a side elevation of a complete grinder from the discharge side thereof, having certain portions of the upper housings broken away to show the arrangement of the feed rolls and the cutter with relation to the other parts of the ma *1 i c. Fig. 2 is an elevation looking at the end of the machine opposite the feeding trough which will be called herein the rear end. ig. 3 is a plan view of the grinder proper, the upper portions of the housings or covers being removed to show the working parts within. -Fig. 4 is a vertical, longitudinal section of the grinder body in the plane l% of Fig. 3, showing the main working shaft and certain other Fig. 5 is a detail end view of the feed gate and the adjacent parts from the side of the grinding burs showing the portion of the feed controlling chamber between the gate and the grinding bars in vertical transverse section in the plane 5-5 of Fig. 4 and Fig. 6 is a vertical transverse section in the plane 6-6 of Fig. l, looking in the direction of the arrow 4 through the throat of the grinder at the discharge end of the supplementary force feed conveyer.

Referring to these drawings, A is the frame of the grinder proper supported by means oflegs (1 upon skids b and c0ntaining a series of downwardly concave portions a (4 a (see Fig. 3) which will be called respectively the breaking chamber, the feed controlling chamber and the grinding chamber. The walls of these chambers are completed by means of suitable removable housings or covers in the ordinary manner.

A feed table, B, Fig. 1, having legs 6, supported upon the skids 7), carries the mouth of the machine, H, which is c0nnected by suitable housings with the frame A and furnishes means for mounting or supporting a pair of feed rolls, G, G a stationary knife F, a rotating cutter head E, carrying a series of knives, e, and a preliminary breaker and feeder D, Figs. 3 and i.

The frame A is provided with boxes a (E, o in which is journaled a main breaking, feeding and grinding shaft C extending axially through the breaking, feed controlling and grinding chambers.

The shaft C is driven by means of a wings, (Z spirally arranged upon the shaft and the direction of the rotation of the latter is such that the materials passing through the grinder are moved slowly toward the left in Fig. i which is toward the eduction end of the breaking chamber through which said materials pass to the grinding burs.

Upon the main shaft C, within the break ing chamber and below the preliminary breaking shaft are a spiral flange 0 a series of breaking teeth, 0 spirally arranged on the shaft and a pair of spiral wings, a all arranged with reference to the direction of rotation of the shaft, to move the material to the left. The flange 0 prevents the material from lodging in the lower portion of the breaking chamber opposite the eduction end, the breakers 0 break up the larger materials and at the same time crowd them toward said eduction end and the wings a forcibly eject said materials from the chamber.

Next to the wings c and turning upon the main shaft C, is a rotatable feed gate, K, Figs. 4c and 5, and beyond the feed gate is a partition M. Said partition has a semi-circular opening, m, and a corresponding opening, 71:, in the feed gate may be brought into registration or partially or wholly out of registration with the opening in the partition to regulate or close the opening through the gate.

A series of teeth, upon the periphery of the feed gate, together with a worm 70 on a shaft 70 provided with a crank 70*, provide means for rotating the feed gate K upon the main shaft to vary the size of the feed opening.

Upon the shaft C, and commencing close to the partition M, is a spiral flange 0* extending through the feed controlling chamber and into the throat of the grinding mechanism which is shown at O. The termination of the spiral wings 0 close to the feed gate upon one side and the commencement of the spiral flange a close to the feed partition, upon the other side, makes it possible to hurry the material through the feed opening rapidly and to regulate the quantity which passes through accurately by means of the feed gate without danger of clogging the machine.

In grinding coarse material only, said materials are fed in the mouth H of the machine to the feed rolls Gr, G which pass them over the stationary knife F in position to be cut into short lengths by the rotating cutter E, which throws them forward and downward within the reach of the preliminary breaker D. This, with its comparatively slow movement, exerts a combined breaking, downwardly feeding and laterally conveying action upon the materials, packs them down upon the main breakers beneath which break them still finer and feed them to the spiral Wings 0 The latter carry the materials onward to the feed opening, wiping the feed gate clean upon the induction side and the spiral flange 0* picks them up on the opposite side of the partition M, wiping the latter clean upon the eduction side and rushing the broken feed into the mouth of the grinder and to the grinding burs which are of well known construction and need not be described herein.

The preliminary breaker D, with its comparatively slow rotation, co-acts with the main breaker beneath, with its oomparatively rapid rotation to reduce the materials to the required degree of fineness much more efficiently and with less strain upon the machine than is possible with a single breaking shaft.

The spiral wings 0 upon the main shaft, closely wiping one side of the feed gate and the spiral flange 0 closely wiping the other side of the partition against which the feed gate slides, co-act with said feed gate and partition to keep the feed opening at all times clear for the moving material, which in ordinary machines of this class is liable to become lodged in the passage and render uncertain the extent of the feed opening corresponding to any particular position of the feed gate.

It is often desirable in grinding certain classes of feed to mix therewith a limited quantity of small grain. This should be added to the mixture in the breaking chamber so that it may be distributed evenly through the coarser materials before passing to the grinding-burs. For this purpose an opening of some sort must be provided between the cutter head and the breaking mechanism and a great many serious accidents have occurred because of the proximity of the cutter head to these openings. To avoid the possibility of such accidents, I have provided an opening protected in such a way that the operator cannot possibly reach through it to the cutter head. The housing or cover through which this opening is provided is seen at P and its lower edge [9, is secured to the downwardly concave portion a of the breaking chamber. A preferably triangular opening in this housing is provided at p and a pivoted gate 10 is arranged to cover this opening when no mixture of small grain is desired. Just inside the tri-angular opening and extending inwardly and downwardly from the upper edge thereof is a shield 37 of suflicient extent to prevent the operator from reaching the cutter head through the opening. An auxiliary hopper Q is provided to be attached to the machine adjacent to the housing P to hold a supply of small grain in a convenient position for feeding through the opening 10 I recognize the possibility of variation in the form, construction and arrangement of the parts herein described and I desire not to limit myself to the same except as clearly pointed out in the following claims in which it is my intention to cover all of the patentable novelty contained in my invention over the prior art.

I claim as new and desire to secure by Letters Patent 1. In a feed grinder, the combination with a suitable frame and driving gear of grinding burs mounted therein, housings inclosing a breaking chamber, a main breaker shaft journaled in the lower portion of said chamber near the grinding burs, suitable breaking teeth and spirally arranged, eonveying devices upon the shaft to break up the feed and urge it toward the grinding burs, a preliminary breaker shaft journaled in the breaking chamber and geared to a slower rotation than the main breaker shaft and radially projecting breakers upon the preliminary breaker shaft spirally arranged to give the feed a sli ht preliminary movemcnt toward the grinding end of the machine.

2. In a feed grinder, the combination with a suitable frame and driving gear of grinding burs mounted therein, housings inclosing a breaking chamber, a main breaker shaft ournaled in the lower portion of said chamber near the grinding burs, suitable breaking teeth and spirally arranged conveying devices upon the shaft to break up the feed and urge it toward the grinding burs, a preliminary breaker shaft j ournaled in the breaking chamber and geared to a slower rotation than the main breaker shaft and radially projecting breakers upon the preliminary breaker shaft.

3. In a feed grinder, the combination with a suitable frame and driving gear of grinding burs mounted therein, housings inclosing a breaking chamber, a main breaker shaft journaled in the lower portion of said chamber near the grinding burs, suitable breaking teeth and spirally arranged conveying devices upon the shaft to break up the feed and urge it toward the grinding burs, a preliminary breaker shaft journaled in the breaking chamber and radially projecting breakers upon the preliminary breaker shaft spirally arranged to give the feed a slight preliminary movement toward the grinding end of the machine.

4:. In a feed mill, a breaker chamber having an adjustable discharge opening, a feed chamber to receive material discharged throu h said opening and itself open on the side opposite said opening, a screw conveyer arranged to force material out of the feed chamber at said opposite side, grinding devices through which said conveyer forces the material which it expels from the feed chamber, and means in the breaking cham ber for breaking material and forcing it through said discharge opening, said means, conveyer and a part of the grinding devices being fixed to a common shaft.

5. The combination with a breaker chamber having an adjustable outlet opening, devices in said chamber for breaking material and urging it toward said opening, a feed screw in position to receive material delivered through said opening, grinding devices in position to receive material discharged by the screw, and a casing inclosing the screw and resisting outward movement of material in its path.

6. A force feed grinder comprising a frame and housings inclosing a breaking chamber, a grinding chamber and an intermediate feed controlling chamber, a suitably driven main shaft extending through said chambers, breaking teeth upon said shaft in the breaking chamber spirally ar ranged to feed toward the grinding chamber, grinding burs upon said shaft in the grinding chamber, a partition in the feed controlling chamber transverse of the shaft and having a suitable feed opening, a feed gate adjacent to the partition having a feed opening which may be moved into or out of register with the opening in the partition, spiral conveying devices upon the shaft feeding toward the grinding burs and arranged respectively upon opposite sides of the partition and feed gate to respectively wipe the same to keep the feed opening clear, and a preliminary breaker shaft journaled in the breaking chamber above the main shaft and provided with breakers spirally arranged to give the feed a slight movement in the same direction as the main shaft.

7. A feed grinder comprising a frame and housings, inclosing a breaking chamber, a grinding chamber and an intermediate feed controlling chamber, a suitably driven main shaft extending through said chambers, breaking teeth upon said shaft in the breaking chamber, grinding burs upon said shaft in the grinding chamber, a partition in the feedingcontrolling chamber transverse of the shaft and having a suitable feed opening, a feed gate adjacent to the partition having a feed opening which may be moved into or out of register with the opening in the partition, and spiral conveying devices upon the shaft arranged respectively upon opposite sides of the partition and feed gate and respectively wiping the same to keep the feed opening clear and a preliminary breaker shaft in the breaking chamber above the main shaft geared to a slower rotation and provided with breakers spirally arranged to give the feed a slight movement in the same direction as the main shaft.

In witness whereof I have signed the above applications for Letters Patent at- Freeport, Illinois, this 19th day of January HARRY G. McCULLOCH. Witnesses:

F. G. SHAIBLE, LEE MADDEN.

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

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