US521409A - Pulp-screen - Google Patents

Description

(NoMoael.)

E. M. HALL 8v F. PEARSE.

PULP SCREEN.

Pate'ntedfJune 12, 1894.

Ema/gaffe ,me oo o o o o a oo o o o o oo o o o o oo noone u o o e o |gmmmimummmlululllllilmlllum @$11 l dllll" WIIJVESSE'S w w n d UNITED STATES PATENTL muon.

EDWARD M. HALL AND FRANK PEARSE, OF DEXTER, NEW YORK.

PULP-SCREEN.

SPECIFICATION forming part of Letters Patent No. 521,409, dated June 12, 1894. Application filed January 11, 1894. Serial No.4961529- (N modeL) v To all whom t may concern,.- A l Be it known that we, EDWARD M. HALL and FRANK PnARsE, citizens of the United States of America, residing at Dexter, in the county of Jefferson and State of New York, have inyented certain new and useful Improvements 1nPulp-Screens5 and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable oth# ers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters .of reference marked thereon, which form a part of this specication.

This invention relates to improvements in pulp-screens; and it consists in providing the diaphragm of a pulpscreen with springs which are adapted to move said diaphragm against the action of the cams on the operatzo ing shaft, the springs extending across the diaphragm so as to bear upon the side pieces of the frame of the pulp-screen.

In the accompanying drawings, forming part of this specification, Figure 1 is a side z 5 view of a pulp-screen,.partly in section, showing our improvements applied thereto. Fig.

2 is a sectional view on the line 2-2 of Fig.

l, and Fig. 3 is a detail plan view, a part of the screen-plate being broken away.` 3o@ A designates the base of the pulp-screen, the

frame B of which is provided with a suitable trough B and with a series of transverse beams B2 which form supports for the diaphragm on each side of the compartments'of 3 5 the pulp-chamber. Upon the frame B is secured the diaphragm D, which is ,of suitable ileXible material, and across this diaphragm between the transverse beams B2 are located springs E, and upon these springs are attached 4o plates e against which the cams c on the operatingshaft C bear. On the under side of the diaphragm beneath the springs are attached reinforcing strips e. The springs E and reinforcing strips e and e are connected to the 'diaphragm by bolts or rivets e2.

F designates the upper frame of the pulpscreen to the side pieces of which are attached transverse partitions F which divide the pulp-chamber G into a series of compartments 5o g; these partitions lie immediately above the transverse beams B2 and through the same passes the operating shaft O. The inner sides Fis connected to the frame B in any suitable manner, preferably by bolts so that the parts can be securely connected together.

" Each compartment of the pulp-chamber has an outlet opening g which communicates with the trough Bf.

Inoperatin thepulp is fed into the pulp screen above the perforated screen-plate H and the shaft is driven so as to vibrate the diaphragme which will cause the .pulp to be drawn through theperforated screen-plate into the compartments of the pulp-chamber and it then iinds its way to the trough B from which it may be conveyed to a suitable discharge pipe.

It will be noted that the diaphragme are partially supported by the springs, and that they are alternately vibrated, the cams being in dierent positions upon the shaft.

A pulp-screen constructed as herein shown VVand described may be set up to occupy but little space, and in operation Will agitato the pulp above the screen-plate so as to render the straining positive and effective.

We are aware that prior to our invention it has been proposed to provide a paper pulpscreen with a straining plate below which is located a diaphragm, said diaphragm being adapted to be vibrated by a shaft having camdisks, and We do not claim such construction broadly; but

What We do claim as new, and desire to secure by Letters Patent, is-

l. In a pulp-screen, the combination, with a base having a diaphragm and transverse springs connected thereto, of a shaft having cams for vibrating the diaphragms, the shaft and cams carried thereby being within the pulpchamber, substantially as described an for the purpose set forth.

2. In a pulp-screen constructed substantially as described, the combination, of the dia- IOC phragms having springs and bearing-p1ates attached above said springs, ot ashaft mounted above the diaphragms and below the screen-plate, said shaft having cams which are adapted to bear upon the bearing-plates, substantiaily as described and for the purpose set forth.

3. In a pulp-screen, the combination, of a base constructed substantially as described and provided with transverse beams B2, diaphragms connected to said base and provided with springs, bearing-plates e attached to the springs and reinforcing Strips 'e' attached on BURT W. Woon, O. M. Woon.

Images