US824141A - Apparatus for sorting chips. - Google Patents

Description

10.824,141. PATENTED JUNE 264, 1906.

Y H. POWERS.

APA-RATU'SlFOR SORTING CHIPS.

ArPLxcATIoN HLBD JUNE 7, 1905.

`1\I0.s24,141. PATPNTED JUNE 26,1906.

' H. POWERS.

APPARATUS PoR SORTING oH-IPS. APPLIOATION PILED UNE '1, 1906.

' v z SHEETS-snm 2.

nAAnIIliilw IP ScEzEz-:N

ATTORNEYS "HOWARD POWERS, or LiNoOLN, NewV HAMPsuiRn, jAssioeiou or ronn- "FIFTHS TO JOUBERTr CONS`-RUCTION CQMPANY, OF

,BERLNi NEW HAMPSHIRE, A CORPORATION OF HAMPSHIRE.

ARP/imma Fon sperme chips.

No, 824,141. f

To all whom vmay,ce1/town Be it Aknown that l, HOWARD lownns, a citizen of the United lStates, and a resident of Lincoln, in the .county of Grafton and State l of New Hampshiraf'have made certain new yand useful improvements in Apparatus for i `Sorting Chips, of which the following is a ,specifica-tion.

l which separates t e ln the practical preparation 4of wood for making sul-lite paper-pulp lthe wood is out into chips and qui-te a large proportion of the chips get through the machine such large sizes that they require to be subdivided `orrechipped before being suitable to put into the digester to cook. All the knotswhich happen to be in the wood are also intermingled with the chips. lt is common to soreengthe chips to separate the knots 4and large pieces from the chips Vof proper size .but the se aration of the large pieces from the knotsis not so easily effected.

separating the-large chips from'the knots, which consists in a tank or receptacle filled with water, into which the screened out knots and large chips are discharged and in which the knots by their greater specific gravity sink, while the lighter chips float, 1n combination with a series of'perforated pipes arranged close to the water-level, the issue-orifices all lbeing faced in one direction, whereby the floating chips are continuously carried away byl a surface current produced by a series of impinging ets of water or air and under the influence of which the floatin chips are carried OH over a spillway and de ivered to an elevator to be carried up tothe rechipper, all as hereinafter more fully described with reference to the drawings, in which- K, y

Figure 1 is a side elevation, partlyin s ection, of my new apparatus; and Fig. 2 is a plan view of the same.

A is a tank, canal, or other receptacle which is to be filled with water 'and which at one end is made of considerable de th and at the other end has at its upper leve a shallow spillway A', which inclines downwardly and outwardly .and over which a shallowsheet of water is constantly flowing.

B is the dischar e-chute from the screen, little chips from the` larger'ones and the yknots and which chute ,Specificationof LettersvPatenkt, Application iledl'uile 7,1905. :Serialllol 264,5l08.

l .Patented June .26, 1996.

- delivers the knots ,and large chips into the deep .end of the tank. This receiving .end of the tank iis preferably enlarged horizontal direction, as seen in Fig.

current of water `1s ,constantl the tank. A branch C', feontro'lked Eby -a valve c, is used to `lill the tank with water to the spillway-leyel and to supply the spillway.

"From the mam ,-supplyepipel@ a series :of

branch pipes D l) descend to near the level of the water the-tank, and at lthe lower .ends these branch pipes bear horizontal crosspipesfclf, that lie close zto the water-level and `which the water issues in a series of forceful jets always-the samefdirection, and this toward @the spillway AV. "lll-lese -jetspipes are placed close enough -tog-ether to maintain la surface current toward the spillway, which f i feeds the ilo-ating chips .over the .spillway .and My invention consists-in an apparatus for into the elevator `E, which takes them to :the

rechippen "The last .of the `jetfpipes is located to Aplayupon the inclined spillway to keep the chips from clogging on the same.

The branch pipes D are each controlled as toflow of water by valves d, and there may be any desired number of j et-pipes.

As the knots and l'argervchips fall into the tank the knots sink by virtue of their greater specific gravity and remain at the bottom of the deepestportion of the tank and are removed from time to time to be utilized for fuel or .other purpose. The knots are thus retained in a sort of hydraulic trap, while the chips-are progressively carried over the spillway. l

After the tank is filled with water the inflow through the pipe C may be discontinued and the flow through the jet-pipes alone may be suflicient for the flotation of the chipsV over the spillway; but for the more rapid clearance of the chips from the spillway an inflowl through the pi e C is constantly i maintained to give a su icient depth of water on the spillway to float the chips off without cloggin The progress of the large chips after t ey strike the water is so rapid that they do not become sufficiently wet to require drying before they are ready to go to the digester, and this is a great advantage, as it saves delay in the process of manufacture.

In carrying out my invention it is not nec- C is a watensupply pipe vthrougli which .a y flowing -in-to have on one side a series .of apertures :through IOO essary that the surface movement of the Achips should be effected by the jets of water,

for if the inflow of water through the pipe C be maintained in suflicient quantity to float the chips over the spillway the progressive movement of the chips along the tank-surface to the spillway may be effected by a blast or streams of air issuing through the jetpipes or by suitably-placed nozzles.

I do not confine myself to any particular shape of tank, as this may be changed to suit circumstances.

It will be observed that the jet-pipes are located above the level of the spillway and slightly above the level of the water. This involves the following distinctive results: first, that these pipes afford no obstruction to the progressive surface movement of the floating chips, but allow them to move rapidly under the jet-pipes and be discharged over the spillway before the chips have had time to absorb much water, and, secondly, this location of the pipes gives only a surface i movement and does not agitate the lower strata of water, but leaves the lower strata of water quiet and well adapted to the settlement or subsidence of the heavier knots and their separation from the floating chips.

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

1. An apparatus for separating chips, comprising a receptacle for a body of water, and a series of jet-pipes arranged near the waterlevel but above the level of the same and having their orifices all faced in one direction for progressively feeding the chips along the surface of the water.

2. An apparatus for separating chips, comprising a receptacle for a moving body of water, made deep at one end to retain the heavy sinkable pieces and having a shallow spillway at the other end, and jet -pipes arranged above the level of the spillway and having their orifices all faced in one direction for producing a current along the surface.

3. An apparatus for separating chips, comprising a tank, a spillway at the upper level of the tank, a 'water-supply pipe having a plurality of branches with valves, one of said branches serving to supply the tank for maintaining the spillway, and the other branches having jet-pipes arranged above the level of the spillway and having their orifices all faced in one direction to maintain a surface current toward the spillway.

4. An apparatus for separating chips, comprising a tank, a spillway at the upper level of the tank inclining downwardly and outwardly, a water-supply pipe having jet-pipes located above the level of the spillway for maintaining a surface current toward the spillway, and one or more jet-pipes located on the spillway to keep it from clogging.

HOWARD POWERS. g

Witnesses:

WM. E. JOLBERT, MERRILL SHURTLEFF.

Images