USRE7143E - Improvement in bark-mills - Google Patents

Description

' owns cooens, prrrrrsFiELD, MAssAcHusnT'r's. l

'na'Pnov'sm-:Nr Baak-mtas.

' speeineecieii fimiiig pei-i er Lenen riant Ne. iso-,24s, dem oeceber 24, 1871; reime Ne'. 1,113, 'desea nay ao, 1616;' eppiieeien ined mij 13,1816.'-

`1b all whom it Be it known that I, OWEN COOGAN, of Pittslleld,.inlthe county of Berkshire and State ol? Massachusetts, have invented a new and Improved Bark-Mill5 and I do herebydeclare the followingv to be'a full, clear, and .exact description of the same, reference being had to 4. the accompanying drawings, forming part of this speciiication,.'in which- Figure 1 represents a verti l transverse section of my improved bark-mill, andJiig. 2

is a top-plan view of the same.-

Similar letters of reference denote the same parts.

I The object of "my inventionis to reduce bark,

whether in a dry, damp,'or green state, toa Vcondition t'ffor tannersY use. It consists of eelt-lin detailsof construction fully described .in this specification. J.r

' -In carrying my invention into practice VI have provided aiix'ed feed-table, on which the bark is placed aiidfed; forward. Opposite the edge of this, and moving closely past it, are

suitable cuttingteeth, vwhich project from the .surface of a revolving. cylinder, the action o`f f lthe teeth being, in eemieetieii with nie feedof an ordinary circular saw, and the action of' the teeth is'analogous'to that of lthe teeth of such a saw. These disks may be made of any suitable thickness, depending. upon 'the width of the pieces to which it is desirable to reduce the bark. They are represented lin the draw?,-

ings, Fig. .2, as fixed upon the shaft, so as to bring the" teeth in lines slightly spiral; the

last tooth of any rowbeingjust in front. of

v the line of the rst tooth of the lsucceeding row; The teetlL' may also have analternate *arrangement as shown at a: #,in Figs. 1 and 2, and the intervening-lower part of the disks,

\ asat z, Fig. 2, maybe formed'with smaller teeth, for the purpose of clearing the machine. The shaft B. is 4mounted in the frame of the machine, in about thesanie horizontal plane as the Vfeeding-table i. On one end vof lthe shaft B is a suitable pulley` and on 'the other 'I pinion, 0,1- Thi Athrough the idler wheel-'11, drives' the gear'wheel q, iixedon the 'shaft of the feedlroller. 'This feed-roller is lo-v cated directly ov'er the feedtable, and ishnng in bearings in the leversGG, whichare pivoted upon theshaftB. The idlewheel is pivoted on an arm,g,of one of the levers G. These le.

vers extend to the front of the machine, andi are connected, by rods d, to arns upon the4 end of a.v shaft, b, in" the lowerl and front part of the frame. Suitably connected to these rods am the ends of a semi-elliptical spring,

' H, which serve to draw down the arms G,

andthereby cause the feed-roller to press uponV This conthebarkr on the lfeeding-table. struction .permits the feed-roller to adjust itselfto the inequalities of the'bark, and keeps it always in contact therewith. Fromv tle -1 shaft b a treadle, I, projects forward, by whiclr lthe feed-roller maybe conveniently lifted from K the bark. e

- lThe construction -of the feed-roller which I. have shown resembles that of the cutting-cybinder; It is made up of a seriesof disks, like a circular saw, but with truncated teeth, as

shown more clearly in Fig. 1. These, as they a re pressed bythe spring into eontaetwith the bark, feed it forward steadily, and hold-it for the 'action of the cutting-instrument.

The proportions of the driving-gears arepbviously such as' to give the feed-roller much slower rotatidn than'that of thecutting-cylinder.

The freut pari 'ef` the feediiigceble may be hinged, as shown' at b'. This ma sometimes.

be convenientto elevate the bark and allow it .t0 slideto the feeder by its own weight.

fllhelevers G,'b `eiug pivoted'up'on the shaft-m' B, from which motion isderived throughthe' v gears, keep these gears alwaysv inthe same relation to eaehf other, whatever the position of the feed-roller. z

in-forder,V that they may be replaced when both feeds 'and holds the bark. The cutters,

Vetriiiiiig.-eleeeiy pm aie feedingfmbie, eue-ue 'e cutting-points may be made'relnovable,

any'degree of lneness, depending npon,the relative speed of the feed-roller and cutters,

. the edge of the bark presented to them.

In ,the arrangement of cutters shown the 0 bark will he cut into fragments of definite depending upon the feed and thickness 1 size, of the teeth; but theA construction is such that any arrangement of .the teeth will shear across the ends of the bark, and reduce it to small fragments of uniform size.

I claim as my invention- 1. In a bark-mill, the weighted lever G, carrying an idle-wheel which communicates nio. tion from the shaft of the cutters to the feedroller.

2. A feed-roller,counected to pressnrelevers which are adapted to raise or depress the feedroller, as set forth.

3. In a barkmill, the levers G, carrying the sha of the feeder, and in' an arm of one the idle-yvheel p, said levers being -pivoted upon the shaft of the cuttingcylinder and depressed at the opposite ends, as set forth.

4. The levers G, carrying bned to operate as set forth. 4

5.' In a bark-mill, the cutting-cylinder composed of disks having teeth nately, as setforth.

'OWEN COOGA'N.

Witnesses:

W. '.r. comm, I. O. CULLEN.

the feeder-rods d d, arms d', spring H, and treadle I, all com'- a: .ft-', set alter-

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