US839248A - Grinding-mill. - Google Patents

Description

PATENTED DEC. 25, 1906.

J 0. WOODCOCK.

GRINDING MILL.

APPLICATION FILED JUNE 11.1904. RENEWED SEPT. 19, 1906.

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l/WWW f Wm PATENTED DEC. 25, 1906. J. 0. WOODCOCK. GRINDING MILL.

APPLIGATION FILED JUNE 11.1904. RENEWED SEPT. 19, 1906.

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Jag; 0. Wbdqoblc UNITED STATES PATENT orrron ,JJOHN c-wooDeoo or omLLrcor'nE, oHro. I

GRINDING-MILL. I h l Specification of Letters Patent.

PatentedDec. 25, 1906;

Application filed Julie 11 1904. Renewed e ptember 19, 1906. Serial No. 335,312.

lo all it m /ay concern; i v

Be it known that I, JoHN C. WooDoooK, a

citizen of the United States, residing at Chillicothe,,in the county of Ross and Stateof Ohio, have ented certain new and useful Improvements in Grinding-Mills; and Ido hereby declare the following tobe a full,

clear, and exact description of'the invention,

such as will enable others skilled in the art to which-it appertains tornake and use the same.

No. 610,220, dated September 6, 1898. In

r The objectof the present invention is to make an improvement upon the type of mill illustrated in my patents of the United States, No. 5616,869, datedSeptember 24, 1895,,and

such mills it is desirable that they be adapted to grind both coarseand finecoarse for the cattle and finefor the family of the farmer. To accomplish this, it has been my practice to attach to the revolving cone either a finegrinding ora coarse-grinding ring, the change being made by substitution. This substitut1on,'however, involved extensive segregation of the parts of the mill, and not only consumed much valuable time, but alsoinvolved considerable mechanical skill. In my present mill herein set forth the change from coarse grinding to fine grinding'and the reverse involves little more than the raising and lowering of a lever.

In the accompanying drawings, in which I have illustrated one embodiment only of the invention, Figure lis a centralvertical'sectional view showing the parts set for fine grinding. Fig. 2 is a view of the lower portion of the mill, showing theparts set'for coarsegrinding. Fig. 3 1s a horizontal section on the plane :1; 90, Fig,- 1, looking down. Fig. 4 is a similar view on the same plane looking up. Fig. 5 is a fragmentary detail,

. partially in section, on the plane y y, Fig. 1,

on entering grooves i in the inner wall of, the outer cone. or shell.

.6 designates theinner cone that has pro,v

jecting upward from its apex a stem 7, pro vided with splines 7 a engaging groovesinthe The inner finene-grinding ring is designated 6 I The inner coarse-grinding ring is provided with hooks 4 thatare adapted to catch under lugs 6 on the inner fine-grinding ring 6 The inner fine-grinding ring is provided with a diametrlc bridge-bar 6?, in the center of which is hub of the spider-ring, so that the inner cone will beirevolved' with the spider-ring. inner cone carries on its lower edge a coarsef, grinding ring 6*, that cooperates with they coarse-grinding ring 4*.

, 5, glrir-iding ring that cooperates with the outer a bearing to receive the upper end of a dead spindle 7 This spindle is supported on a lever 8, pivoted in a hanger atone side of the base-frame 9 of the mill and having its other or free end restin on an adjustable support 10 at the other si e. A

Supported on the base 9 below the opening between the grinding-rings is shown a circu lar trough 11, having a discharge-opening 11 and within the trough is a revoluble bladed wheel 12, adapted when revolved to carry the ground material to the dischargeopening. The means for carrying the bladed wheel around can consist of afinger 6 secured to and reaching down from the cone 6 through the inner fine-grinding ring into position to contact with one of the blades.

The operation is as follows: With the construction shown the hopper and inner cone and grinding-rings are. turned with a socalled haw draft. When it is desired to grind fine, the lower inner ring is raised to the position indicated in Fig. l, and when so raised thehooks 4 of the upper inner ring catch'under the lugs 6 of the lower ring. When it is desired to grind coarse, the lower fine-grinding ring is depressed,'as seen in Fig.

2. This can be accomplished by turning the hopper slightly backward, so as to disengage the hooks M from the lugs 6 and depressing the lever 8. When the mill is grinding coarse, the inner fine-grinding ring is at rest. It will be observed, therefore, that to change the mill from fine to coarse grinding it is only necessary to adjust the lever 8. The coarsegrinding ring 6 can be adjusted to vary the degree of coarseness of the product by raising and lowering the inner cone 6, which carries the inner grinding-ring, a handled nut 13,

working on a screw 15 in the stem 7, being provided for this purpose. The fine-grinding ring 6 when hung on the hooks 4 can also be adjusted to vary the degree of fineness of the product by the same means.

Changes in the form of the parts shown can be made without departing from the gist of the invention.

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

1. In a grinding-mill of the kind described, the combination of a casing, an outer coarsegrinding ring and an outer fine-grinding ring below the coarse-grinding ring within said casing, an inner coarse-grinding ring to cooperate with the aforesaid outer coarse-grinding ring, means for rotating said inner coarse-grinding ring,means for ad usting said coarse-grinding ring to vary the coarseness of its grinding, means for stationarily supporting and for raising and lowering said inner fine-grinding ring independently of the inner coarse-grinding ring and means for locking said inner finegrinding ring to the coarse-grinding ring only when said inner fine-grinding ring is raised to cooperate with the inner fine-grinding ring.

2. In agrinding-mill of the kind described, the combination of a casing, an outer coarsegrinding ring and an outer fine-grinding ring below the coarse-grinding ring within said casing, an inner coarse-grinding ring to cooperate with the aforesaid outer coarse-grinding ring, means for rotating sald inner co arsegrinding ring, means for stationarily supporting and for raising and lowering said inner fine grinding ring independently of the inner coarse-grinding ring and means for locking said inner fine-grinding ring to the coarse-grinding ring only when said inner fine-grinding ring is raised to cooperate with the inner fine-grinding ring.

3. In a grinding-mill of the kind described, the combination of a casing, an outer coarsegrinding ring and an outer fine-grinding ring below the coarse-grinding ring within said. casing, an inner coarse-grinding ring to cooperate with the air resaid outer coarse-grinding ring, means for rotating said inner coarsegrinding ring, means for st ationarily supporting and for raising and lowering said lnner fine-grinding ring independently of the inner coarse-grinding ring, means for locking said inner fine-grinding ring to the coarse-grinding ring only when said inner fine-grinding ring is raised to cooperate with the inner finegrinding ring, the circular trough 11 below the discharge-opening of the rings, the bladed -wheel 12, and the finger 6 reaching through the fine-grinding ring and engaging the bladed wheel 12 to revolve the same.

In testimony whereof I aflix my signature in presence cf two witnesses.

JOHN C. WOODCOCK.

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