US26412A - John broughton - Google Patents

Description

J. BROUGHTON.

Grinding Mm. No. 26,412. PatentedDc'JS,1859L GRINDIN MI L.

Specification of Letters Patent No. 26,412, dated pecemb To all whom itma'y concern:

Be it known that I,Jo1r1v the city, county, and State of New York, have invented a new and Improved Grinding-Mill and I do hereby declare. thatthe following is a full, clear, and exact descriptionofgthe same, reference being bad to the annexed drawings, making apart of this cient to prevent the mill clogging,

specificatiomin which- H Figurel, is a vertical section of my invention, takenin the line :0, w, Fig. 2. Fig. 2, is a vertical section of ditto, taken injthe line y, y, Fig. 1, and viewedin the direction indicated by arrow 1. Fig. 3, is a vertical section of ditto, also taken in the line y, y,

. Fig. 1, but viewed in the direction indicated by arrow 2.

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

This invention relates to certain improvements in metallic grinding mills, the

class formed of a cone or frustum of a cone revolving Within a co-centric and stationary shell. i

The object of the invention is to prevent the clogging and consequent heating of the mill and at the same time obtain a perfect and rapid grinding'operation with a very simple and economical arrangement of parts.

The grinding mills of this class hitherto constructed possess a serious defect, which arises from the following causes, viz., in

order to prevent the clogging and consequent heating of the grinding surfaces and insure a rapid discharge of the meal, the teeth are formed at an angle or in a winding direction upon the surface of the cone, the consequence of which is that owing to the centrifugal action throwing the meal in a direction at right angles with theedge of' the teeth, a large portion is allowed to escape 1 in a coarse or unground state, this being invariably the case where the angle is sufli any diminution of the angle of the teeth, or an increase of rinding surface in order to insure the meal being properly and finely ground before it is discharged as invariably results in an increase of friction and clog ging and a consequent heatingof the grinding surfaces and meal.

In the construction and arrangement hereinafter shown the above described defect is entirely obviated, and while the capacity of eatly increased the cost of the mill is manufacture 1s considerably reduced.

bearing 6, which h longitudinally in part of the case, spout 0?, depends 'grain or other substance to I To enable those understand and con will proceed to des represents ah. drum supported" at a rights a, a, or. any p,

case or drum A, is.

back end is closed; a

shown clearly inIjFi B is a revolv ng gr d E, is a stationary grinder bolted by the fianches F, to the open end of drumAf. t

G, is a vertical spout commun' atin with the interior of the stationary g der E, and into which spout thefigrain other substance to be groundgis fed fr nfa suitable hopper. 1 H, is the front bearing of the revolving shaft and I, the driving ulleyg 1 1 J, J, are wings] or fan blades. Two or' more of these or iblades ma be *used and they may be castfl on or, secured to the revolving grinder B. fThe revolving grinder B, consistsfof an obtuse cone provided at its. base with the co-cen trio and conical rimor fianch K, theinterior or grinding surface of which inrelation tor its axis forms the oppositeor everseangl of the cone B, while the surf e of thens tionary grinder J, i I with it. l i

This arrangement of double conical, grlnd ing surfaces has theefl'ect of changing jo reversing the action of theniill upon th ground, first it is the convex surfaceof a revolving acting within the concave surface of a tionary shell, and lastly, the;concave surface 1 of a revolving shell acting uponjthe convexl surface ofa stationary cone p f The operation is a sfollo Grrain or other substance is fed into the spout G, and if in lumps or massesjsufliciently large, is first operated upon and reducedbythe cob cutter or crusher D and serratedsurface of I I the shell in which the cutter or [crusher D, rotates. It then passes between the convex surface of the revolving cone B, and the concave surface ofthe stationary grinder p 2 I r 26,412

trifugal action ofathe revolving grinder causes the meal to cling to, instead of be-.

ing thrown from, the concave surface of the revolving rim or flanch K, thus insuring its being perfectly crushed and ground previous to'being discharged at. the spout E, the sudden increase "in the diameter of the revolving grinder insuring the meal being carried through and effectually preventing all'tendency to clog. The wings or fan'- blades J, revolving within the close case or drum A, draw a current of air down the feed spout G, and through and between the grinding surfaces into the hollow case or drum A, from whence it is discharged by the spout d. This current of air constantly passing between the grinding surfaces,

serves to keep them cool and effectually prevents heating and a consequent spoiling of the meal. It also serves to draw through the grain and meal independently of the angle at which the teeth are formed on the grinding surfaces, and also'increases the capacity of the mill by allowing it to be run at a greater velocity without any tendency to heat. The proximity of the grinding surfaces may be regulated by adjusting screw 0.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is,

1. The double and reverse acting conical grinding surfaces B, E, constructed and operated substantially as herein set forth. I

2. In' combination with a revolving grinder and a. hollow case or drum A, I claim thewings or fan-blades J, operating substantially as, and for the purpose herein set forth.

JOHN BROUGI-ITON. WVitnesses 1 MIOH. HUGHES, C. M. HUGHES.

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