US351178A - eolbrook - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

^ B. HOLBROOK'. BARK CUTTER.

Patented Oct. 19, 1886.

1 @nulqilllgmmn www @MN/AM (No Model.) 2 Sheets-Sheet 2.

BARK CUTTER.

No. 851,178. Patented 001. 19, 1888.

dr/nys Unirse Srarns Artnr ritten,

BYRON HOLBROOK, OF MILVAUKEE, VISCONSIN, ASSIGIIOR OF ONE-HALF TO JACOB ORYDERlfIAN, OF SAME PLACE.

BARK-CUTTER.

SPECIEICATION forming part of Letters Patent No. 351,178, dated October 19, 1886A Application filed December 5, 1885. Serial No. 181,801. (No niodcl.)

To @ZZ whom, zit may concern: bear upon said knives, the said screws serving Be it known that I, BYRON HoLBRooii, of to force the cutting-edges of the knives out Milwaukee, inthe county of Milwaukee, andin (more or less) from the surfaces of the plates 55 the State of Visconsin, have invented certain H, so as to increase or lessen the depth of cut 5 new anduseful Improvemenlsin Bark-Cutters, of said knives. The conical shell G is surand I do hereby declare that the following is rounded by stationary shell K, suitably sea full, clear, and exact description thereof. cured to the base A, and this latter shell has My invention relates to bark-cutters; and it its lower portion constructed similarly to that 6o consistsin certain peculiarities ofconstruction, of the former, and secured thereto in the inan- Io as will be hereinafter claimed, and more fully ner above described are plates L and knives described with reference to the accompanying M, the saine in construction as those secured drawings, in whichto said shell G. Iy the above-described con- Figure 1 is a sectional view of one form of struction and relative connection ofthe knife- 5 my invention, several of the knives being plates H L with their respective shells G K I5 omitted for the purpose of clear illustration. any one or all of said plates may be readily re'- Fig. 2 is a horizontal section on line e rc, Fig. moved, should at any time such removal be I; Fig. 3, a top plan view, partly in section, found necessary or convenient. of another forni of my cutter; and Fig. 4, a It will be noticed that the knives I of the 7o vertical section on line ,i/ y, Fig. 3. shell G are externally arranged, while those,

2o Arepresents asuitable base,designcd to sup- M, of the shell K are arranged upon its inport my bark-eutter, and te a Stringer, B, at terior, but with their cutting-edges disposed one side beneath this base, is pivotally conin opposition to said knives on the former nected a horizontal beam, C, the free end c of shell, a sufficient bark-space, m, being left be- 7: said beam being suitably connected to a vertween the respective parts. The shell G has 25 tical adjusting-rod, D, extending up through its upper or solid portion provided with exterthe base and provided with a hand-wheel, b, nal breaker-arms, a, while the shell K is pro- The horizontal beam C is provided with a cenvided at its inner upper portion with similar tral socket, c, which forms a bearing for the arms, o. 8o lower end of a vertical shaft, E, said shaft car- Iolted to the base A and shell K so as to 3o rying a series of breaker-arms, d, and having leave a barkspaee, p, is a casing, N, and sekeyed theretoabeveled gear-wheel,d, designed cured to an outwardly-project-ing ilange, q, at to mesh with a similar wheel, e, on a main the upper end ofsaid shell, is the flanged botdriving-shaft, F. Secured to the vertical shaft toni portion, i', of a hopper, O, the latter hav- 85 E is a conical shell, G, preferably provided ing secured upon its interior breaker-arms s.

55 with a series of slots, f, and a corresponding ln Figs. f3 and 4c, instead of the conical shell series of internal pockets, g, said pockets be- G, I employ a cylindrical shell, P, provided ing adapted to receive the upper offset ends, with slots, and having secured thereto plates l1', of plates H. The lower ends, 7L', of these It and adjustable knives S, the construction 9o plates are also offset, so as to iit over and and connection ol'these parts being similar to 4o upon seatsf, formed by the solid portions of those attached to said shell G. This cylindrithe shell at the lower ends ofthe slots, and at cal shell P has upon its interior, near each this point the parts are bolted together, as end, a series of spokes or braces, t, radiating shown at t. The several plates are each profrom sockets il, adapted to it upon the verti- 9 5 vided with horizontal slots 7F, through which cal shaft E, so that said cylinder may be re- V45 pass bolts k, having their heads countersunk volved therewith. In this form of my barkin external knives, I, this construction and cutter the shelll is surrounded by a cylindriconnection of the parts permitting of an adcal casing, T, cut out at its upper front por- `iustnient to vary the cut, as well as to ccintion to register' with the feeding-trough U. roc pensate for the wear upon said knives. To This casing is provided upon its interior with 5o further vary the cut of the knives I, the plates a series of angular projections, fr, arranged at H are notched at suitable intervals, and prosuitable intervals, and having adjustably sevided with adjusting-screws h, designed to cured thereon knives V, the Hitting-edges ol' which are disposed in opposition to those-on the cylindrical shell P, and said casing and shell are so arranged with relation to each other as to leave between them a bark-space, c. Extending across the trough U, near its Ainner end, is a corrugated roller, w, one end of which is journaled in a side of said trough, the other end being reduced and extended to revolve in a bearing, w', and'has keyed thereto a band-pulley, 102, and journaled in bearings w3 in front of the roller w, on each side of the trough, are short corrugated rollers z, said rollers being employed to feed the bark to the knives upon the revolving cylindrical shellP.

In the operation of the first form of my invention, bark, being introduced into the hopper O, is subjected to the action of the breaker-arms d and s, and by them reduced. The reduced bark is carried down between the conical revolving shell G and the stationary one, K, and is further reduced by the action of the breaker-arms n o,projecting from the respective shells. After being thus reduced the bark continues down and accumulates in the space v m, where it is subjected to the action of the knives I M on the conical revolving shell G and stationary shell K, these knives operating to shave the bark, the chips or shavings therefrom passing through the slots in said shells and falling to the floor or a suitable receptacle 'below the supporting-frame Aof the machine. The bark-space m may be increased or lessened -accordingly as the horizontal beam C may be adjusted by the vertical rod D, and this adjusting means may be alsoemployed to throw the driving mechanism out of gear, it being only necessary to depress said beam a sufficient distance to bring the gear-wheel d on the shaft E out of mesh' with the gear e on the driving-shaft F.

The operation of that form of my invention shown in Figs. 3 and 4. is virtually the same as that shown by Figs. 1 and 2 and above described, With the exception that the bark is fed from the trough U by the corrugated rollers w z directly to the knives upon the revolving cylindrical shell l?, and the shavings from said bark pass through the slots in said cylindrical shell and fall to the floor or receptacle. Such particles of bark as may escape the action of the revolving knives are carried on into the space c', between the cylindrical shell l? and casing T, and as it accumulates to fill said space the mass is acted upon by said revolving knives and the stationary ones, V,upon the interior of the casing, the cutting-edges of the respective knives being oppositely arranged, as above described.

By my device the bark is planed into chips or shavings of any desirable grade, and by the peculiar arrangement of the knives they act on both sides ofthe mass of bark, thereby facilitating the operation of reducing bark, and the substance thus reduced is left in the best possible condition for the extraction of its tanningproperties.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

1. In a bark-cutter, the combination of an outer shell, a series of knives suitably secured to the inner face of said outer shell, an inner shell provided with a series of slots that extend in the direction of its length, a corresponding series of knives suitably secured to the inner shell and having their cutting-edges projected outwardly therefrom, and means for revolving said inner shell in a direction opposite to the cutting-edges of the knives on the outer shell, substantially as and for the purpose set forth.

2. In a bark-cutter, the combination of an outer shell provided with a series of slots that extend in the direction of its length, a corresponding series of knives suitablysecured to said shell and their cutting-edges arranged to proj ect inwardly therefrom, an inner shell also provided with a series of slots similar to those in the outer shell, a corresponding series of knives suitably secured to the latter shell and having their cutting edges proj ected outwardly therefrom, and means for revolving this inner shell in a direction opposite to the cutting-edges of the knives on the outer shell, substantially as and for the purpose set forth. v

3. In a bark-cutter, an outer shell provided with a series of slots that extend in the direction of its length, a corresponding series of removable plates secured to said outer shell, and a series of adjustable knives in turn secured to the plates, in combination with an inner shell also provided with slots similar to those in the outer shell, a corresponding series IOO of plates secured to the inner shell, a series of adjustable knives in turn secured to the latter Aplates and arranged to have their cuttingedges in opposition to those of the knives on said outer shell, and means for revolving said inner shell, substantially as and for the purpose set forth. g

4. In a bark-cutter, the combination, with means for reducing the bark, of an outer shell, a series of knives secured to said shell and having their cutting-edges arranged to project inwardly therefrom, an inner shell provided with a series of knives having their cuttingedges arranged to project outwardly therefrom, and means for revolving this inner shell in a direction opposite to the cutting-edges of the knives on the outer shell, substantially as and for the purpose set forth.

5. In a bark-cutter, an outer shell provided with a series of slots that extend in the direction of its length, a corresponding series of external pockets, a series of plates offset at their ends and secured to this outer shell, and a series of knives in turn adjustably secured to the plates, in combination with an inner shell provided with slots similar to those in the outer shell, internal pockets, a series of plates, also offset at their ends and secured to the inner shell, a series of knives in turn adjustably-secured to these latter plates and arranged to have their cutting-edges in opposition to those of the knives on said outer casing surroundingsaid outer shell, anda supshell, and means for revolving said inner shell, l porting-base, substantially as and for the pursubstantially as and for the purpose set forth. pose set forth.

A bark-cutter comprising a hopper pro- In testimony that I claim the foregoing I vided with interior breaker-arms, a vertcallyhave hereunto set my hand, at Milwaukee, in adjustable shaft, also provided with breakerthe county of Milwaukee and State of VVS- arnis, an inner shell secured to the shaft and cousin, in the presence of two witnesses. provided with exterior knives and breakerl T T arms, au outer shell provided with interior BX ROA HOLBROOK breaker-arms and knives, the latter arranged to have their cutting-edges in opposition to those of the knives on the said inner shell, a

Vitnesses:

H. G. UNDERWOOD, MAURICE F. FREAR.

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