US20121A - Corn and cob mill - Google Patents

Description

B. WlNTER.

Corn and Cob Mill.

Patented April 27, 1858.

UNITED STATES PATENT OFFICE.

BENJN. IVINTER, OF BUOKINGHAM COURT-HOUSE, VIRGINIA.

CORN AND COB MILL.

Specification of Letters Patent N0. 20,121, dated April 27, 1858.

T 0 all whom it may concern:

Be it known that I, BENJAMIN ENTER, of Buckingham Court-House, in the county of Buckingham and State of Virginia, have invented a certain new and useful Improvement in Corn and Cob Mills, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, which forms part of this specification, and in which Figure 1 represents a top view or plan of the mill; Fig. 2 a partly sectional elevation; and Fig. 3 an inverted plan, the base box being in horizontal section.

My improvement has reference to that class of mills in which an inner vertical cone is made to revolve within an outer cone, shell or case, the feed being from above and the ground matter passing off below in its escape from between the cones which form the grinding surfaces.

In the mill represented in the accompanying drawing, the driven cone (A) is freely hung for vertical play or action as it revolves, which vertical action may take place three or any other number of times during each revolution, and the object of which is to prevent surfeit or clogging by causing the cones to free themselves when grinding fine, said relief being produced by the enlargement of the escape and increase of distance apart of the grinding surfaces each time the inner cone rises, and by the up and down movement of said cone acting on the material under operation to loosen and discharge it. This latter effect is more perfectly accomplished by giving an easy and gradual rise to the cone, but an abrupt drop to it, so as to gently relieve the inner cone and prevent it from jerking upward too far or in too great quantity the ground material, when said cone rises, and so as to urge abruptly and detach with certainty the loosened material at the escape, when the cone falls. The means I employ for producing these actions are as simple as efficient. Thus, I ease and steady the revolving rim of the cone, by causing the weight of the cone to be borne by anti-friction rollers (a) arranged at some distance from the center of the cone the base of which rests upon the rollers; and, by forming the base of the cone of a series of inclines (b), the gradual rise and abrupt fall of the revolving cone from and on the rollers is effected. Of course the same action that relieves the mill from clogging and promotes the discharge, admits or facilitates the feed of fresh material, and expedites grinding. I prefer this manner of relieving the mill to certain jerking or smoothly acting arrangements previously used.

Acting in concert with the inclines (b) on the base of the cone and rollers (a), are stepped horizontal disks (0, cl), the lower one (o) of which is fastto the staff of the cone (A) below the carrying rollers (a), and the upper one ((Z) of which is a stationary fixture connected with the bridge tree (C). These stepped disks, or disks with their adjoining faces formed with inclined planes, are intended to have what may be termed a negative action, that is they are intended to restrain the revolving cone from rising to an undue height, when traveling rapidly, and, should the cone be inclined to stick when raised, to easily and gradually lower it at the periods it should drop abruptly.

The bridge tree (C), it will be observed, carries the anti-friction rollers (a) on which the revolving cone (A) runs, so thatthe one stepped disk also being connected with the bridge tree and the other disk with the staff of the cone and the bridge tree through which the staff passes being constructed to control the position of the cone,the adjustment of the bridge tree, as hereinafter described, will not interfere with the relative positions of the rollers (a) to the center of the cone and the relative positions of the specified appurtenances for giving or insuring a certain rise and fall to the revolving cone, consequently all distinct adjustment of these appurtenances may be avoided when the bridge tree is acted upon to adjust the cone.

The centering of the revolving cone (A) within the fixed outer cone (B) is effected by screws (6, f) connected with the bridge tree and arranged in slots of a base box (D) to pull or push upon the cone staff by means of double nuts (g, h) in other than strictlyopposite radial directions. Connected also with the bridge tree are vertical screws (70), that, by means of screw nuts and pinions (Z), and a toothed ring (an), operative by hand, serve to raise and lower the bridge tree and through it the revolving cone so as to grind coarse or fine, also serve to hold the bridge tree in position and prevent it from moving up or doWn When no such movement or adjustment is desired.

VVhat I claim as new and useful hereln, and desire to secure by Letters Patent, is:

The combination of the adjustable bridge tree (0), rollers (a), inclined planes (b) on the base of the revolving cone (A), and horizontal stepped disks (0 d), for action together substantially as and for the purposes 10 set forth.

In testimony whereof I have hereunto subscribed my name.

BENJAMIN WINTER.

Witnesses THEo. WV. LITTLE,- L. O. DANISON.

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