US81933A - Amos newell - Google Patents

Description

A. NEWELL. Millfor Pulverizing Bone, &c.

Patented Sept. 8, 1868.

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AMOS N EWELL, OF REDWING, MINNESOTA, ASSIGN OR TO HIMSELF, HENRY S. BROWN, GEORGE E. ARNOLD, AND ALFRED ARNOLD.

Letters Patent No. 81,933, dated September 8,1868.

IMPROVED MILL son PULVERIZI'NG BONE, at.

Be it known that I, AMOS NEWELL, of Redwing, county of Goodhue, State of Minnesota, have invented an I Improvement in Mills for Pulverizing Bone, Ore, and other hard substances and I do hereby declare thatthe following is a full and exact description thereof, reference being bad to the accompanying drawings, and letters of reference marked thereon.

My invention relates to the well-known class of mills wherein thesaid materials are pulverized by the action of a series of rotating hammers revolving in a case with great velocity; and it. consists in keeping the said materials more constantly under the effective operation of the hammers, and in soretarding their progress, from their entrance to their exit, as to insure suflicient fineness of division to admitthem to discharge from the distant end of the mill, at or near the periphery of the case, without the assistance of exhaust, blast, or other extraneous means now employed for discharging said mills.

The plan herein described for carrying my said invention into operation consists in dividing said mill into several cross-sectional compartments, leaving an annular space between the partitions and inner circumference of the case, thus forming an interior passage, longitudinally, from one compartment to another, throughout the length of the mill,- directly across the path traversed by the hammers.

In the drawing-- I v 'Figure 1 is a. longitudinal section through the line e e in fig. 2, and

Figure 2 a cross-section through the lineff in fig. 1.

A is the case; B, the hammers; C, the partitions; D, the shaft; a, the feed-orifice; a, the dischargeorifice. In this instance, the partitions G are disks, firmly attached to the shaft D and hammers B, with which they revolve.

If desired, the hammers B may be attached to the shaft by arms or otherwise, and the partitions C may be made stationary, and firmly attached to the case A at several points, leaving annular spaces between them and the case, except at the several points where they are attached to the case; but I prefer the arrangement shown,

The area of the annular space for any one diameter of A must depend on the kind of'material to be ground, and the fineness of division desired; that is, if the material to be ground be easily pulverized, a larger space may be allowed for it to pass through than if more difficult to pulverize, and, if a coarse division of the material be desired, a larger space may be allowed than if a finer division is desired. If the same mill is required to do various kinds of work, the disks may be made adjustable, so as'to lessen or increase the distance between their peripheries and the inner surface of the case. The distance will be readily determined by the practical constructor and user.

In theoperation of my improved mill, the material to be ground is fed through the orifice a. Its flow may, if desired, be regulated by a graduating hopper, or other well-known. device for thatpurpose. The revolving hammers cause the coarser portions of the material fed in to rebound from side to side of A, but they can only pass longitudinally by crossing the paths of B, and receiving their blows. The finer portion, being compressed by centrifugal force against the inner circumference of case A, is forced gradually towards a, where it is discharged. 7

What I claim as my invention is-- p The case A, hammers B, and partitions 0, combined and arranged substantially as shown, for the purpose herein set forth.

AMOS NEWELL.

Witnesses:

HENRY STANTON, F. W. SULMONSON.

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