US133333A - Improvement in metallic grinding-rings for mills - Google Patents

Description

lMmn' Grinding Rings for. Mms.

iPat-ented Nov. 26, 1872.`

UNITED STATES PATENT OFFICE.

GEORGE OCONNOR AND HAINES OCQNNOR, OF MISHAWAKA, INDIANA.

IMFROVEMENT IN METALLIC GRINDING-RINGS FOR MILLS.

Specification forming part of Letters Patent No. 133,333, dated November 2d, 1872.

To all whom it may concern:

Be it known that we, GEORGE OGONNOR and HAINES OGONNOR, of Mishawaka, in the county of St. Joseph and State of Indiana, have invented certain Improvements in Grinding-Mills, of which the following is a specification':

The nature of our invention consists in the construction, arrangement, and operation of two similar grindingplates, one stationary and the other revolving upon it.

Figure 1 represents a section of the face of the grindin g-plates. Fig. 2 represents the line of action of the ridges and grooves when in operation. Fig. 3 represents a sectional view of the two plates, when placed together for work, cut through the receivers.

The plates are constructed with ridges a. a, receivers b b, and ille grooves cut from the periphery down the slant of the receivers, forming the ridges o c. The ridges a a stand at a suicient angle to the inner circumference of the plates to take in and throw otf the grain and meal by acting across each other, as at f f, Fig. 2. The ne grooves c c start at the periphery and run down the slanting face ofthe receivers, so that a sectional view obtained by cutting through the receivers when the plates are placed together presents a wedge-shaped opening, as seen at e, Fig. 3. The grain is forced outward in the receivers by the action of the ridges a a into the wedge-shaped opening c, when it soonV arrives at a point Where it begins to be crushedby the action of the ridges o c. The nishingup or fine grinding is all done at the point the plates.

This ne grinding all being done at the eX- treme outer edge ofthe plates, instead of being distributed over a considerable portion of the surface of the plates, we find, by experi! ence, enables ns to grind with far less consumption of power than has ever been accomplished heretofore.

When the grindingsurface becomes worn smooth it will be only necessary to grind or out down the stationary ring by grinding ott' the outside of the ring at an angle until the portion so ground or cut away shall meet that part of the fine dress c o not worn, .and by grinding down the ridges a. a to correspond, when the ring will present a grindingsurface as good as new, which process may be renewed until the ring is worn out.

We do not broadly claim in this application a line dress extending a short distance from the periphery of the plate; but,

Having thus fully described our invention,

g, Fig. 3-the periphery of what we claim, and desire to secure by Letters Patent, is-

A detachable grindingring, when provided with the receivers and line drifts on the incline and the point of surface, all constructed and arranged substantially as and for the purpose herein specified.V

\ GEORGE OCONNOR.

Witnesses:

A. I. PETTIT, J. H. WHITsoN.

HAINES OCONNOR.

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