US242428A - Pulp-screen and breast-roll box for paper-machines - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

0.. BREMAKER. Pulp Screen and Breast R011 Box for Paper Machines.

No. 242,428. Patented June 7,1881.

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2 R E K A M E R B 0 Pulp Screen and Breast R011 Box for Paper Machines.

Patented June 7; 1881.

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WITNESSES NITED STATES;

PATENT OFFICE. v

CHARLES BREMAKER, OF LOUISVILLE, KENTUCKY.

PULP-SCREEN AND BREAST-ROLL BOX PAPER-MACHINES.

SPECIFICATION forming part of Letters Patent No. 242,428, dated June '7, 1881.

Application filed April 16, 1881. (No model.)

of the city of Louisville, in the county of Jef-j ferson and State of Kentucky, have invented a certain new and useful Improvement in Pulp- Screens andBreast-Roll Boxes for Paper-Machines; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, ref erence being bad to the accompanying drawings, forming part ofthis specification.

This my invention relates to a certain new and useful improvement in pulp-screen and breast-roll boxes, which are made of wood and in form as shown in the drawings, and securely bolted together at the ends, with an elastic or yielding bottom made of prepared cotton duck, prepared paper, and a double thickness of leather placed together,with metal bars above and below, and secured to the box-frame by means of screws through the bars and bottom up into the frame above, with the corners of the bars rounded next to the bottom to prevent cutting the bottom, which is partially covered with wood on the inside in order to give solidity to a sufficient portion of it to receive the jack-hangers and cam-blocks by which it is operated,which is done by means of a revolving disk with involute shaped points working; against a die on the under side of the camblocks, thereby causing the bot-tom to rise gradually but fall suddenly, causing a constant drop motion in its operation.

This invention further consists in the addition of certain cross-partitions and slides near the ends of the breast-roll box, as shown, for the purpose of regulating the height of the pulp in the screen-box, to preventflooding and to regulate the flow into the breast-roll box, which is further provided with a valve of peculiar construction to regulate the discharge of the pulp.

The object of this my invention is to provideapulp-screen box of durable construction, having an elastic or yielding bottom consisting of prepared cotton duck, prepared paper, and a double thickness of leather placed together in sheets and held together by metal bars above and below, and secured to the box-frame by means of screws through bars and bottom up into the frame, with the corners of the bars rounded to prevent cutting, thereby forming a box with a strong, elastic, yielding bottom, perfectly water-tight, and not liable to get out of order or break where it connects with the box and wood covering on the inside, by the constant shock caused by the drop motion of the bottom in its operation.

I attain the above objects by the mechanism illustrated in the accompanying drawings, in which Figure l is asectional view of the pulp-screen box, with the frame cutaway to show the mechanism by which it. is operated. Fig. 2 is a cross-section, taken asindicated bym w,sh0wing the elastic bottom and the several devices by which it is operated. Fig. 3 isalso a crosssection of the screen-box, taken as indicated by g 3 showing part of the box and the yielding bottom and mechanism by which it is operated. Fig. 4 is a perspective view of the breast-roll box, showing the parallel partition and cross-partitions, with their slides, and the discharge-valve c0mpartment. Fig. 5 is a perspective view of the screen box and frame, show in g part of the screen-plates and the dischargeopenings at the side. Fig. 6 is a sectional view of the screw for regulating the drop of the screen-box bottom, showing the lock-nut thereon. Fig.7 is a sectional view of the screw-and gearing for regulating the discharge-valve of the breast-roll box. Fig. 8 is a sectional view of the pipes which connect the screen-box with the breast-roll box, showing the loose flange used on the inside.

Similar letters refer to similar parts throughout the several views.

This my invention will be more fully illustrated in detail in the drawings, in which- A A represent the frame of the machine, which is made of wood, framed and bolted together as shown in the drawings, with the top edges beveled on the inside.

B B are the parallel beams, upon which the operating mechanism rests, and to which it is secured. a

O G are the upper, and D D the lower, parts of the pulp-screen box, which is made of wood about six and one-half feet long and three feet seven inches wide, and of material three and one-half inches thick, slightly halved or dovetailed at the corners, and secured firmly together by means of bolts through the entire end pieces.

E E are the hinges by which the parts are connected.

F is a gum gasket inserted in the edges of the screen-box to form a water-tight joint.

HHare lugs on the side, by which the parts are held together.

I I are cross -bars in the upper part of the box, and upon which the screen-platesJ J rest, which plates are made of metal and in form as shown.

KKare brass or metal bars, about one and three-fourths of an inch wide by half an inch thick, let into the lower edge of the box-frame on the inside their full thickness, with the corners rounded to prevent cutting the bottom. L is a gum gasket placed over these bars to form a water-tight joint.

G is a sheet of prepared cotton duck stretched over the lower edge of the box.

N is a sheet of prepared paper, and O is a double thickness of leather, all of which are held together and secured to the lower edge of the box-frame D by means of screws through corresponding metal bars above and below, and series of sheets constituting the bottom, up into the frame above. The difference between the width of the bar It and the thickness of the box-frame D is made up by thin strips of wood to form a smooth level surface across the edges, where they rest upon the frame, to which it is bolted, as shown in the drawings.

The inside of the bottom S is nearly covered with wood T, about two inches thick, chamfered at the sides and ends, leaving a space of about five inches between it and the sides and ends of the box.

U U are metal bars, similar to those on the box, let into the under side of the wood covering T around the edges, with the corners rounded to prevent cutting the bottom, and are secured thereto by means of screws through similar bars, V V, under the bottom, up into the wood above.

The edges of all the above-named bars U V and RK are rounded to prevent wearing or cutting the bottom by its rising and drop motion while in operation.

W is the cam-block, which is secured to the under side of the box-bottom S, between the bars V V, with a projection on the under side extending down nearly to the disk 0 with a groove about one and a half inch square in the under surface, slightly dovetailed on the side, with a steel die, Z, fitted therein and secured by a set-screw, A, at the side. The lower surface of the die Z is formed to correspond with the shape of the disk points D, which work against it, and in order to relieve the bottom S from the strain caused by the weight and sudden shock required in its operation, a yoke or hanger, B, formed as shown,

is secured to the bottom between the bars V V, extending down below the shaft N, leaving a small space below for vibration. The lower ends of the hangers B are provided with strong caps E, secured thereto, having a projection on the under side, with a recess or opening extending nearly through the projection, slightly dovetailed on the inside, with a block of hard wood, F, fitted therein, and secured by means of a wedge in the center and a pin through both metal and wood, which extends slightly below the metal, and is intended for the purpose of relieving the bottom of the shock caused by its constant dropping upon the head of the regulating-screw G, and to prevent noise. These screws G are provided with large round heads, made flat on the top and inserted in a strong plate, H, resting on the frameB, with a hexagon nut, J, and sleeve L 011 the top, which is made tapering on the outside and threaded both inside and outside, with a slit, K, in the side, leaving a slight open space in the sleeve, which is closed upon the screw by the corresponding nut J, when screwed down over it, thereby forming a locknnt for the screw.

N is the main driving-shaft, and O is the disk.

D are the involute points that operate the bottom S.

O is the shaft-bearings, and P is the pulley.

Q are oil stands or cups, in which the disks 0 revolve in order to keep them lubricated.

R are discharge-openings in the screen-box D, and S is the breast-roll box, which is made of wood and in form as shown in the drawings.

T is the central division, and U is the lower opening, through which the pulp passes into the next compartment.

V are cross-partitions near the ends, forming receptacles for the pulp as it enters them from the openings R, and W are slides on these partitions for the purpose of regulating the height of the pulp in the screen-box, and to prevent overflowing the breast-roll box.

X is a false bottom in the box S.

Y is an opening, through which the pulp rises in discharging itself through the openin g Z.

A is a valve over the opening Y, which is made in form as shown, and sufficiently long to cover the opening, with slight rises on the edges of the lower surface, to form a more perfeet seat when dressed true to prevent leakage, and is further prevented from turning by small lugs at the corners, resting against the sides of the box.

B is the valvestem, which is made with a square head recessed into the valve and cap to prevent turning, and secured therein by bolts through the cap, in such a manner as to "ibrate slightly to keep the valve properly seated.

C is a plate on the box S, and D are gearingwheels, one of which has a boss on the back working loosely in the plate C and is held in its place by a flange under the plate, and is made to answer as a nut for the screw, to raise and lower the valve without turning the screw. 7

E is a cover of the discharge part of the breast-roll box.

F are the brackets upon which the box rests.

G2 are flat pipes for connecting the boxes, one end of which is provided with a separate flange to be used on the inside of the breastroll box to assist in securing the pipes thereto.

I am aware that pulp-screen boxes have been used with flexible bottoms partially covered with wood on the under side and operated by an irregular-formed disk; but so far as I am aware no boxes have been in use having a bottom composed of prepared cotton duck, prepared paper, and leather in sheets, covering the entire bottom and secured to the box by means of screws through metal bars above and below into the box above, with the corners of the bars rounded to prevent cutting the bottom, which is partially covcred'with wood on the inside to render a portion of it solid, in order to attach thereto the operating mechanism. Therefore I do not broadly claim a flexible bottom; but

What I do claim as my invention, and desire to secureby Letters Patent in pulp-screen boxes for making paper, is

1. The composition bottom S, consisting of a sheet of prepared cotton duck, G, a sheet of prepared paper, N, and a double sheet of leather, 0, in combination with the frame D, substantially as herein described, and for the purpose set forth.

2. In a pulp-screen box having a composition bottom, S, consisting of prepared cotton duck G, preparedpaper N, and leather 0, the metal bars K R and U V, with rounded corners, in combination with the interior wood covering, T, pipes G and flange H substan- 3 5 tially as described, and for the purpose set forth.

3. In a pulp-screen box having composition bottom S, the yokes B, wood filling F, and adjusting-screws G, in combination with the 4,0 nut J, sleeve L, slit K, and. jam-nut J substantially as described, and for the purpose set forth.

4. In a pulp-screen box, the cam-blocks W, steel die Z, and disk 0 with its involute points 4 5 D, in combination with the shaft N, by which it is operated, substantially as herein described, and for the purpose set forth.

5. In a breast-roll box, the combination of the cross-partitions V and slides W, substano tially as herein described, and for the purpose set forth.

6. The combination of the valve A stem B plate 0 and gearing D by which it is operated, substantially as herein described, and for 5 5 the purpose set forth.

CHARLES BREMAKER.

Witnesses:

FRANK PARDON, G. HEWITT.-

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