US1340599A

US1340599A - Strainer

Info

Publication number: US1340599A
Application number: US313652A
Authority: US
Inventors: Ralph S Clarke
Original assignee: Bird Machine Co Inc
Current assignee: Bird Machine Co Inc
Priority date: 1919-07-26
Filing date: 1919-07-26
Publication date: 1920-05-18
Anticipated expiration: 1937-05-18

Description

UNITED sTATEs PATENT oEEIcE. v

RALPH S. CLARKE, OF WALPOLE, MASSACHUSETTS, ASSIGNOR T0 BIRD MACHINE COMPANY, A CORPORATION 0F MASSACHUSETTS.

STRAINER.

move coarse materials carried by a fluid it is especially applicable for arresting such materials carried bywater passing to a paper making machine and more particularly the water passing to shower pipes employed 'for the purpose of cleaning felts or screens.

The main object of the invention is to provide a simple structure in which, by a manipulation of the parts the current may be caused to flow through the screening surface in a reverse direction having in view the removal of the arrested material from the screen surface. i d

A. further object resides in the formation of the parts so that as the reversal of flow is set up a discharge valve will be automatically opened and the normal discharge line or passage closed.

A still further object resides in so forming the parts that the screen surface will' be subjected to a scraping action as it is shifted in the act of positioning the parts Ito effect the reversel flow.

The structure is illustrated in the annexed drawings wherein: ,I

Figure 1 is a vertical sectional view of the device with the parts in their normal position, and

Fig. 2 is a similar fragmentary view showing the strainer so positioned as to'effect a reverse How therethrough and the discharge valve open.

In said drawings 1 denotes the main casting or body having an inlet 2, an outlet 3 for the strained fluid and a discharge port or opening 4 through which the Afluid and the material removed thereby from the screen pass during the reverse How.

Within thek upper part of the body there is formed a chamber 5 from which the outlet 3. extends. The lower yorfbottom wall 6 of Specification of Letters Patent. Patented May 18, 1920. Application led .Tuly 26,

1919. Serial No. 313,652.4

`said chamber is provided with an annular openlng 7 and the upper end of the chamber is closed by a cap piece or cover 8 removably secured in place by pivotally mounted bolts 9 and thumb-nuts 10. Said cover 1s provided with an upwardly eX- tending lug or projection 11 which is in teriorly threaded to receive a threaded stem or shaft carrying a crank at its upper end. A suitable packing nut or gland 14 is mounted on lug 11 to provide a tight joint around the stem of shaft 12. The shaft immediately below the threaded portion has secured to it anv annular head or disk 15 while at the lower end thereof there is secured a grid-like head comprising a hub 16 an annular rim 17 and interconnecting spokes 18. An annular strainer element 19 formed preferably from perforated sheet metal, as brass, is secured to the heads and they outer diameter thereof is such that the outer surface of the strainer makes a close fit with the wall of opening 7.

Extending across and within the body 1 and in a plane above the discharge opening 4 is a cross partition or diaphragm 20 said partition having an opening 21 formed therein.

The lower vend of the casting, or the discharge chamber thereof, is interiorly threaded anddisk like member or nut 22 is mounted therein. Said disk carries a guide 23 for the downwardly extending stem 24: 0f a Valve head 25 which latter carries a ring shaped washer 26 of rubber or the like which normally bears against the under face of partition 20 and closes the opening 21. The valve head is provided with an upwardly extending lug or teat 27. d Resting upon the upper .face of nut or disk 22 is a spring 28 which preferably takes the shape of` a cylinder formed from rubber and resting on the upper end of such spring is a lcap giece 29 throughwhich the stem 24 passes. aid spring acting through the cap piece acts to force the valve to its closed position and to close the opening 21 and to consequently cut off the discharge ort 4.

With the parts in the position iii in Fig. 1 the water and the material which' may be carried thereby enters the interior of* the body 1 or the central chamber thereof' through the port 2, thence through the 'perforate head into the interior of' the ustrated strainer. Any coarse material will be ardownward rotary movement the exterior surface thereof will be scraped by contact with the wall of opening 7 thereby cutting or loosening any protruding strings or the like. Continued downward movement of the strainer will finall bring the parts to the position shown in ig. 2 wherein it will be seen that the opening 7 will be closed by head 15 and the valve 25 moved downwardly Jfrom its seat, the spring 28 being placed under compression. At the 'Sametime the annular member 17 of the lower head will contact with the upper face of partition 20 and inasmuch as such elements are faced off or smooth a tight joint is formed therebetween. The incoming water will at such time be forced to flow inwardly through the screen surface and such iniow will remove .the previously arrested foreign matter and carry it downwardly through the lower grid-like head through opening 21 and to the discharge opening 4.

During the lowering movement of the screen no water may pass'tol the outlet 3 which does not pass through the screen and' whenthe screen reaches its lowest position the chamber 5 and its outlet 3 are entirely out oif. v

When the, screened surface is cleaned it is elevated through manipulation of shaft 12 and as it begins to rise or has moved to a slight extent valve 25 is automaticall closed through the action of spring 28. akage about the valve stem. 24 is prevented vby using a cylindrical shaped springas 28.

i' formed at one end thereof, a discharge- Ready access to the parts may be had by removal of cap 8 and the n ut 22.

What is claimed is 1. In a strainer, the combination of acast-` ing or body' having an outlet chamber chamber, and an intermediate inlet chamber; a valve normally closing said discharge chamber from the inlet chamber; a strainer located within the outlet chamber and in communication with the inlet chamber; and means for moving the strainer into the inlet chamber and opening the discharge valve. 2. In a strainer, the combination of a casting or body. having an outlet chamber formed at one end thereof, a discharge i chamber at the opposite lend, andan intermediate inlet chamber; a valve normally closing said discharge chamber from the inlet chamber; a strainer located within the outlet chamber and movable through a ort or opening formed in that wall interino 'ate the inlet .and outlet chambers, said strainer communicating interiorly' with .the inlet chamber; and means for moving the strainerl y through said opening into the inlet chamber said strainer as it nears its limit of inward movement contacting the valve and opening the same.

3. In a strainer, the combination of a casting or body having an outlet chamber formed at one end thereof, a discharge chamber at the opposite end, and an intermediate inlet chamber; a valve normally closing said discharge chamber from lthe inlet chamber; a strainer located within the outlet chamber and movable through a port or opening formed in that wall intermediate the inlet and outlet chambers, said strainer communicating interiorly with the inlet chamber; and means for moving the strainer through said opening into the inlet chamber said strainer when moved inwardly to its full extent opening the valve and closing off the opening through which itis passed.

4. vIn a strainer, the combination of a casting or body having an outlet chamber formed at one end thereof, a v discharge chamber at the opposite end, and an intermediate inlet chamber; a valve normally closing said discharge chamber from the inlet chamber.; a strainer located within the f5.' In a strainer, the combination of a cast- Y ing or body having an outlet chamber, a discharge chamben and an intermediate inlet chamber; la strainer located within' the outllet chamber and communicating interiorly with the inlet chamber; va valve normally closing a port leading from the inlet to=the discharge chamber; a valve stem extendin downwardly therefrom; a combined .nut an valve stem ide mounted in the lower portionlof the v ischar e chamber; a spring resting on the nut and acting to force the valve toits. seat; and means for moving the strainer downwardly into the inlet chamber izo and into contact with the valve to open the -1 latter against the actionl of the 6. In a strainer, the combination of a casting orvbody` having an outletV chamber, a discharge chamber and an intermediate inlet chamber; a strainer located within the loutwith the Vinlet chamber; avalve normally closing a port leading from the inlet to the let chamber and communicating interiorly discharge chamber; a valve Vstem extending downwardly therefrom; a combined nut and valve stem guide mounted in the lower portion of the discharge chamber a cylindrical shaped spring restlng on the nut and encircling `the stem; a eap overlying and closing the upper end of said spring ;V and means for moving the vstrainer downwardly into the inlet chamber and into Contact with the valve to open the latter against the action of the spring. y

In testimony whereof I have signed my name to this specification.

RALPH S'. CLARKE.