US592090A

US592090A - Joseph j

Info

Publication number: US592090A
Authority: US
Publication date: 1897-10-19
Anticipated expiration: 1914-10-19

Description

J. J. HARRELL. WOOD PULP MAKING MACHINE.

No. 592,090. PatentedOct. 19,1897.

(No Model.) 2 Sheets-Sheet 2.

J.'J. HARRELL. WOOD PULP MAKING MACHINE.

No. 592,090. I Patented O0t.19, 1897.

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UNITED STATES I PATENT OFFICE.

JOSEPH J. HARRELL, OFIQHI OAGO, ILLINOIS, ASSIGNOR OF THREE-FOURTHS TO CHARLES HQABBOTT AND W ILLIAM WQ'HESSEY, OF DENVER, COLO- RADO.

:w ooDr'PuLP-MA rNe MACHINE.

srncrrrcA'rio vir m part of Letters Patent No. 592,090, dated October 19, 1897.

' Application filed llecemher re, 1896. s rain). 615,6 74.. (N0 model.)

To all whom it concern: f

Be it known that I, JOSEPH J. HARRELL, a citizen of the United States, residingat Ohicago, in the county of Cook and State of Illi- 'nois, have inventedcertain' new and useful Improvements in Wood-'Pulp Making Ma'- chines; and I do declare the following to be a plication for Letters Patent filed July 9, 1896,

Serial No.,598,544.

The objects of the invention are, to provide for the reduction of the material from the block form to the chip form in connection with the pulverizing mechanism; to better provide for the agitation of the pulp within the reducing-chamber,'and to prevent the clogging of the discharging-screen.

With these objects in view it consists in so constructing and arranging the machine that it is provided with a cutting or chipping device at the mouth of a hopper adapted to receive the material in'block form, and which feeds the reducing-mill; in so forming the inclosing case that it is provided with a large chamber above the heaters into which the pulp isthrown from the beaters by centrifugal action, the wall of this chamber against which the pulp is so discharged being so curved that the material is thrown forwardly, so that it may descend by the action of gravity among the beater-arms, and in so forming the ribs or bars of the discharging-screen that the agitation of the pulp will tend to dislodge from the, screen-aperture any large particles which may gather therein.

In the drawings, Figure 1 is a front elevation of the machine. Fig. 2 is a transverse vertical section thereof upon the line 2 2 of Fig. Fig. 3 is a longitudinal vertical section upon the line 3 3 of Fig. 2.

' The shell or casing of the machine A is oblong rectangular' in its general contour, and is horizontally divided into two sections, the lower one a forming the bottom of the casing, and being apertured to receive the discharging-screen, which is curved in form, the arc of curvature having the axis of the beatershaft as its center. This shaft 0 is j ournaled longitudinally within the casing A, and upon it are mounted a plurality of disks D, having radiating arms d, as shown, eight in number. These disks are spaced apart by means of rings F, which, together with the disks, are keyed upon the shaft. The disks D are so set upon the shaft that the beater-blades d are arranged in spiral form, the spiral running from the middle of the, machine to its sides, in one direction taking the form of a right screw-thread and in the other a left screw-thread, so that as the heaters revolve they tend to move the pulp continuously toward the sides of the machine. A plurality of blades E are fixed in one of the side walls of the casing A and project inwardly, intermeshing with the beater-blades and terminating beyond their bases, the inner ends of these blades being thickened, as indicated at 6, so as to bear against the surface of adjacent disks D. The blades E. are held in this machine in the same manner as in the earlier machine above referred to, being set within a recess formed between the attaching-flanges of the upper and lower sections of the casing, and being looked in place by means of a rib a engaging transverse notches in the blades, the blades being spaced apart by the introduction of suitable blocks 6.

The screen consists of the two slotted plates G H, the former being the inner one, being in fixed relation with the bottom a of the casing, and the outer one being adapted to slide upon its companion, and being held in frictional contact therewith-by means of the curved bars J, pivoted at j to one side of the bottom a of the casing and secured by means of bolts 3' to the other side thereof, the

outer ends of the bars J being united by means of the plates J. The inner faces of the bars of the screen G are beveled, so as to present an inclined face to the pulp as it is carried forward by the action of the heaters, so that the inner face of the screen presents the appearance of a series of grooves having an abrupt and an inclined wall, thereby forming an abutment over which the pulp is precipitated, and preventing slivers of wood from being driven into the interstices of the screen, and allowing any particles which may seek lodgement therein to be quickly washed out by the agitation of the material.

The adjustment of the screen, as in the case of my earlier machine, is accomplished by means of a crank-handle K, fixed upon a rock-shaft 7t, journaled within the bars J and having fingers k engaging suitable sockets in the bands k secured to the outer plate H of the screen.

The casing A extends upwardly above the heaters, so as to form a suitable chamber into which the pulp is discharged from the heaters by centrifugal action. That wall of the casing along which the pulp is thus discharged is curved inwardly at its upper end, as indicated at a, so that the pulp is thrown forwardly and descends upon the heaters by the action of gravity. By this means I am able to return the pulp to the inner portions of the heaters, the centrifugal action tending at all times to carry it to their outer ends. A casing 13, of less length than the casing A, is superimposed upon the latter and is secured thereto by the hinge B at one side and by bolts B at the other side. YVithin the casing 13 the top of the casiir A is apertured to receive the material, and an apron L extends from one side of this aperture obliquely downwardly, so as to receive the impact of the pulp, then upwardly from the heaters, and terminates a sufficient distance from the side wall of the casing A to permit the entry of fresh material. The top of the casing Bis open, serving as the mouth of a hopper, which consists in part of the walls of the casing and in part of a swinging plate Z), pivoted within the casin g and supported by a screw-threaded rod 1), projecting through the casing-wall and being provided with a hand-wheel. 3etwcen the mouth of the hopper thus formed and the apron L is journaled a horizontal cylinder M, carrying the cutting-blades m m. The wood to be operated upon is introduced into the hopper in the form of blocks X, which fall upon the face of the cylinder M, so that the cutting-blades gradually reduce them by chipping, the chips being carried downwardly and delivered into the reducingchamber. A horizontal pipe Z extends longitudinally through the casing immediately below the cylinder M and is provided throughout its length with small discharge apertures, by which means a suitable quantity of water may be delivered to the machine with the chips. The cylinder M is driven from the shaft C by means of a belt 0 upon suitable pulleys upon this shaft and the shaft of the cylinder. A helt-tightener in the form of an idle-pulley P cooperates with the belt, being suitably journaled in the arms 1) p, projecting from a sleeve Q, mounted upon a shaft q, secured in brackets attached to one of the sides of the casing A. The sleeve Q is controlled by a handle-bar R and is locked in an advanced position by means of a ratchet-wheel r and a pawl S. By this means a loose belt may be employed, so that when desired the cuttingcylindcr M may be stopped without interfering with the action of the heaters, so that if the chips are fed to the pulverizer too rapidly the clogging of the machine may be prevented.

The upper edges of the blades E are inclined, as shown in Fig. 2, downwardly from the wall of the casing, so that by impact of the chips upon these blades they are thrown toward the center of the beater-cylinder and prevented while in this larger form from being thrown directly against the screen. After the material has become finely subdivided, this incline form of the upper edge of the blades ceases in great measure to divert them to the center, so that the effect of thus forming the plate is measurably to assort the coarser from the finer material, leaving the latter free to seek by the centrifugal action to escape through the screen. Near their inner ends the top edges of the blades are given an upward inclination, so as to prevent the material from being carried too far to the center and into the space between the disks D.

The plate I), forming one of the walls of the hopper, is mounted upon a pivot, as shown, so that the capacity of the hopper may be varied to adapt the machine to the character of material being operated upon. Should the material be hard and require a longer time for reduction, it is obvious that the feed should be slower, and this is secured by advancing the plate Z) so as to contract the throat of the hopper and thereby reduce the number of blocks in contact with the cutting-blades, and consequently the quantity of chips delivered to the pulverizing-chamher. When wood is used, which is more readily reduced, the plate Z) may be moved backwardly, permitting a greater number of blocks to come into contact with the blades, and thus incrcasin g the quantity of chips produced.

1. In a wood-pulp mill the combination with a plurality of heaters mounted upon a horizontal shaft, a case for inclosing such beaters, and having an enlarged chamber above the heaters to receive the pulp thrown there from by centrifugal action, the roof of such chamber being curved to direct the pulp forward in the direct-ion of rotation of the heaters.

2. lnawood-pulp mill the combination with In testimony whereof I aflix my signature a plurality of rotatable heaters, and a casing in presence of two Witnesses.

for inclosing such heaters of a slotted discharge-screen, the bars of which have their JOSEPH HARRELL' 5 inner faces beveled outwardly in the direcl/Vitnessesz tion oppositely t0 the direction of rotation of LOUIS K. GILLSON,

the heaters. SAKE D. THOMPSON.