US111744A - Improvement in bark-mills - Google Patents

Description

J. HELEN-BROOK.

Bark Mill.

Patented Feb. 14, 1871.

I n' I I VVicnesseL l 1 Inventgr;

il 1 M4 WWW n4 PEIERS, PHOT LHMOGRAFHER WASHINGTON D c turn cm JOHN HELENBROOK, 0F OLEA N, YORK.

Letters Patent No.-111,-744, dated February 14, 1871.-

.IMPROVEMENT lN BARK-MILLS.

The Schedule referred to in these Letters Patent and making part of the lame.

To all whom it mdy concern Be it known that'I, J OHN Hutnmsnook, of Clean, in the county of Oattaraugus and State of New York, have invented certain new and useful Improvements in Bark-Mills; and the following .is a full, clear, and exact description of the same, reference being bad to the accompanying drawing makin' g a part of this specifioation, in which i Figure 1 represents a plan or top view of the hopper,- breaking, brushing, and grinding apparatus.

Figur -e2 shows a sectional view through the mill, with the arrangement of all the working parts and theirrelation to each other for operating,"as hereafter more fully described.

The object and nature of my invention are to break up, crush, and grind bark for tanning purposes and It consists in the inclined pronged sweep for breaking up-and feeding in the bark.

General Description of Parts. 1 The hopper A A, which surrounds the breaking,

crushing, and grinding mechanism, andreceives the bark to be ground, may be made of cast-iron ornf wroughtsheet metal, and may be supported on and secured to'the frame-work of the building or on a separate framefas may be desired.

The stationary portion of the crushing-"and grind-' ing mechanism is secured within the hopper A A, and it consists of bars, .B B, forming a right-angle frame, the center of which forms the journal-box O for the upper end of the vertical shaft D to ruu iu.

The bars B B are providedwith prongs, b ,b, pro jecting upward from their surfhce, which are a part of the breaking mechanism.

On the under side of the bars B B are lugs or prongs, d d, projecting down, to which the series of circular, cone-shaped, notched, or serrated stationary grinding-rings E E is secured, and held firmly to the frame in the lower portion of the hopper A A.

The corresponding series of rotating rings, F F, is notched or serrated in the same manner as the stationary grinding-rings E Er and may be cast on orsecured to the arms G G. at such a position as to fit nicely in the spaces between the stationary rings E E, so that the barkis ground or pulverized on both sides of the cone-rings in all of the spaces.

The arms G G are provided with lugs, .g g, on the underside, by which the cone serrated rings h F are rotated by the action of the clutch h on the shaft 1), which will admitof the series of rings F if being nnoved up or down on the shaft, so, as to grind the bark coarser or finer, as may be desired.

On the upper edges of the rotating rings or bars F F is a series of the purpose of breaking strips of bark so that it will readily feed in to be pulverized after it is broken up coarsely by the revolving sweeping arm K, which is secured to the vertical shaft D above the frame B B.

One arm of the sweep K is inclined. upward on an angle of about five degrees, and is provided with prongs, cc 0, on its"under side, which pass between the projecting prongs b b on the upper side of the bars B B, to crush and break up the bark so that it will readily feed in to be mechanism beneath it.

The sweep K is also provided with sharp angular ground or pulverized by the projections, k i k, to aid in breaking up the bark and.

prevent it from being forced out against the outer portion of the hopper, and to give great durability and eiiiciency.

'lhe lower portion ofall of the cone-shaped serrated annular grinding-rings E and F 'is cast on a chill and rnade --very hard; or tempered steel serrated bands, 13 i 't i, may be fitted on the bottoms of the rings or bars of, both the stationary and rotating grinders E E and F F, asshowu in fig. 2, sothnt they can be taken off and sharpened, come worn and dull by use. g

What I claim as my improvements is- In the bark-mill herein described, the arrangement of the sweep K, with one of its arms elevated and provid'ed with projections 7t 7.: and prongs c c c, in combination with the frame-bars B B, provided with. prongs b1), when all the parts are constructed and arranged as shown and described, for the purposes set forth.

In testimony whereof I hereunto subscribe my name in the presence of two witnesses.

JOHN HELENBROOK.

Witnesses JOHN Somsunnn, O. S. STOWELL.

projecting booked prongs, f f j; forshould they be-

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