US12181A - Amory felton - Google Patents

Description

A. FELTON.

Grinding Mill,-

; Patented Jan. 2, 1855.

I No. 12,181.

s Phnin-Lilhographun Wauhinglulm D. cv

amen STATES PATENT ornron AMORY FELTON, or TROY, NEwxoRK.

GRINDING-MILL.

Specification formingpart of Letters Patent No. 12,181, dated January 2, 1855; Reissued January 29, 1856, No. 347. v

. declare that the following is a full, clear,

and exact description of the same, reference; being had to the annexed drawings, making a part of this specification, in which- Figure 1 is a longitudinal vertical section of my improved mill, the cylinder not being bisected. The plane of section is through the center. Fig. 2 is a transverse vertical section of ditto, the hopper andtshoe not being bisected. Fig. 3 is a detached plan or top view of the concave. Fig. 4 is an internal view of the cap which covers the cylinder, said cap being inverted.

' Similar letters of reference indicate corresponding parts in the several figures.

The nature of my'invention consists in the employment or use of a corrugated cylinder, concave and cap provided with spiral flanches, and reciprocating teeth. The above parts being combined and arranged as will be presently shown.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A, Figs. 1 and 2, represents a box or case uponthe upper part of which the axis (a) of a cylinder B has its bearings. A portion of the cylinder, about one half, being within the box or case. The periphery of the cylinder B is corrugated or has teeth upon it, one side of which, are radial with the cylinder, the opposite side, being oblique or inclined but not quite tangential with the periphery of the cylinder as shown in Fig. 2. The cylinder is made of cast iron, chilled cast iron of course being preferable, or it can be made of stone, or stone and iron combined, or of any other material. Directly underneath the cylinder B there is a concave C which is semicircular, see Fig. 2, and constructed of the same material as the cylinder. The concave is provided with teeth on about two thirds of its surface, the teeth of the concave being precisely similar to the teeth of the cylinder. The ends of the concave rests in semi-circular grooves or recesses at the inner sides of the box or case and directly underneath the concave there is a frame D the ends of which fit in the inner sides of the box or case. To the outer edge of this frame an; upright E is attached hav ing a screw thread cut on its upper endon which anut Fis fitted. The upper'end of.

the screw thread passes through the center of a spring G, the nut F being on the upper:

side of'the spring as shown in Fig. 2.

H is a cap which isfitted over the top of.

thecylinder B, one side of the cap is curved and corresponds to a portion of the periphcry of the cylinder, see'Fig. 2. At one end of the cap there is an opening (6). The un-' der surface of the cap is provided with spiral fianches (0) see' Figs and the portion of the concave C which is not'provided with teeth is-also, provided with spiral fianches (a) see Fig. 3 which when the cap is placed over the cylinder coincide with the flanches of the cap, see red dotted lines Fig. 1.

I is a rod which passes longitudinally through the cap H at one side, see Figs. 1, 2, and 4. One end of this rod is bent and fits in an irregular groove (d) out in the periphery of pulley J which is hung at one end of the axis (a) of the cylinder B.- The opposite end of the rod I is bent upward and passes through a slotted plate K attached to the end of a shoe L which is underneath a hopper M, said hopper being sup ported by a frame N on the upper part of the box or case A, see Figs. 1 and 2.

To the rod I are attached a series of teeth or fingers (e) see Figs 1 and 2 and 4: the teeth or fingers being shown by dotted lines in Fig. 1. The teeth or fingers (6) project downward to a point about on a line with the center of the cylinder, as shown in Figs. 1 and 2.

At one end of the concave C there is an opening (f), see Figs. 1, 2 and 3, the opening being shown by dotted lines in Fig. 1.

The grain to be ground is placed in the hopper M and the clyinder B being made to rotate the grain passes from the shoe L and through the opening (6) and then between the cylinder and concave, the shake motion being given the shoe by the reciprocating motion of the rod I the reciprocation motion being given the rod by the irregular groove (0!) in the pulley J. The concave C it will be seen extends around about one third only of the periphery of the cylinder, and the grain is admitted between the cylinder and concave at one end. The grain as it is crushed is carried along to the opposite or discharge end of the concave by the spiral flanches (c). The flanches being so arranged as to cause the grain to pass over the cylinder and between the grinding surfaces several times before reaching the discharge end, and in such manner as to render it impossible for the grain to pass twice between any portion of the grinding surfaces, thus leaving the passage clear for that which follows, by which means the mill can be fed very fast without clogging and the cylinder and concave are made of sufficient length so that the grain may be passed through a suflicient grinding surface. The fingers (e) vibrate or work with a reciprocating motion at the discharge end of the concave opposite the opening (f) and prevent the ground grain from clogging at that part. The concave is adjusted to the cylinder so as to grind coarse or fine by operating the nut F on the upper part of the rod E.

Although the term cylinder is used in the description of the mill, still it may be of slighttaper form and also the concave. The cylinder and concave very slightly increasing in diameter toward the discharge end. This would give a greater grinding surface with a given length than if a perfect cylinder were used.

The above mill works well in practice and requires but very little power to drive it, 'inE30 consequence of the arrangement of the concave and flanches. One horse power will grind four bushels per hour. It is intended for farmers use,'and principally for grinding feed, but works equally well for grinding cofi'ee, spices, drugs, &c., and when made of stone, works well for grinding flour.

I do not claim separately either of the parts herein described, but

What I do claim as new and desire to secure by Letters Patent, is

The combination of the cylinder B, concave C, cap H, and reciprocating teeth or fingers (e) the concave and cap being provided with spiral flanches (0) the above parts being constructed and arranged substantially as shown and for the purpose as set forth. J

AMORY FELTON.

Witnesses:

P. L. J ONES, Moses WARREN.

[Fmsr PRINTED .191 3.]

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