US618965A - Filter - Google Patents

Description

Pat'anted Feb. 7, I899. J. F. THEURER.

no. muss.

F ILTEB.

(Application filed Dec. 81, 1897.\

(No Modal.)

NORRIS Fzrslis co., PHOTO-LINK)" WASNXNGTOH,

UNITED STATES PATENT ()FFICE.

JACOB F. THEURER, OF MILWAUKEE, WISCONSIN.

FILTER.

SPECIFICATION forming part of Letters Patent No. 618,965, dated February 7, 1899.

Application filed December 31,1897. Serial No. 665,044. (No model.)

' To all whom it may concern.-

Be it known that I, JACOB F. THEURER, a

citizen of the United States, residing at Mil-- waukee,in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Filters, of which the following is a specification.

My present invention pertains to filters,and has reference more particularly to the construction of the filter elements designed to be used in the so-called battery filters.

The invention is illustrated in the annexed drawings, wherein- Figure 1 is a transverse sectional view of one of the elements after the pulp or filtering material has been compressed therein; Fig. 2, a similar View showing the completed element, and Fig. 3 an enlarged detail view. 1

The object of my present invention is to so construct and treat the filtering element that there will be no seepage or leakage of the fluid by or around the abutting edges or faces of the filtering mass and its retaining or holding frame.

In the drawings I have represented the retaining or holding frame in the form of a pan comprising a bottom A, havingan upstanding rim B and a central hollow boss 0, slightly reduced at its lower end, as shown. The bottom of the pan inclines from the rim to the boss and is provided or formed with a series of ribs D, the upper edges of which preferably lie in a horizontal plane. Openings E are formed in the boss, extending therethrough and opening intermediate the ribs.

The inclined bottom of the pan does not lead directly up to the inner wall of the rim, but instead there is formed an inwardly-projecting shoulder F, formed by the upright wall G and the horizontal wall H. A fiat bearing-face I is provided intermediate the bottom of the pan and the upright face G of the shoulder. There is also formed around the central hub or boss a shoulder J, defined by the horizontal face K and upright face L. A fiat or horizontal face M, similar to the face I, is also provided, said faces preferably lying in the same horizontal plane.

In building up the filtering-body I first place a perforate disk of metal N within the pan, the disk being of such dimensions that it bears squarely upon the faces I and M..

Upon this disk there is placed a disk of wire-- gauze 0, preferably supported at its edges by strengthening-bands P, the combined thickness of said bands, gauze disk, and perforate plate N approximating the height of the upright walls L and M, so that the strengthening-bands lie in the same plane as the faces K and H. When these parts are in place, the mass of pulp Q, of the requisite amount and consistency, is placed within the pan upon the disks. Pressure is then applied to the upper face of the pulp and it is condensed to the degree shown in Fig. 1, the body being homogeneous and of a like density throughout. It will be noted upon reference to said figure and also to Fig. 2 that the lower face of the mass near its outer and inner edges rests, respectively, directly upon the horizontal faces II and K and extends beyond the rims or bands P. When the mass has been given that pressure which fits it to act as a filtering medium and which reduces its bulk so that it lies below the top.

of the rim B and boss 0 a gauze disk R,

having depending rims or bands S at its edges, is then placed upon the upper face of the body of compressed pulp. These bands are preferably curved upon their under face and are designed to be forced down into the body of the pulp overthe faces H and K, respectively. The mass having already been compressed the action of the rims is to condense that portion of the pulp which isimmediately below and also slightly to each side, as indicated by the shaded sections T. It not only condenses the pulp in a direct line, but it also tends to force the particles against the hub and the rim B, thereby forming a closer union between the edge of the filtering-body and its retaining-frame. An upper perforate metal disk U is then placed over the gauze disk, or said disk U may be placed thereon before the rims or bands S are forced down into the mass.

Any suitable frame for holding the filtering mass may of course be employed and the form shown is merely for the purpose of illustration. So, too, the lower and upper perforate metal disks may perhaps under some circumstances be dispensed with, and hence I do not desire to be understood as limiting myself thereto.

In practice a series of these filtering elements are employed; but of course one alone may be used. The object of the construction is, however, the same under both circumstances-that is, the seepage of the unfiltered liquid around the edges of the filtering-body is prevented. Ordinarily the liquid passes from the upper face to the lower, and naturally it will pass through that portion which is not condensed. 'It is precluded from passing around the edges of the mass by reason of the close contact of the parts, and, furthermore, the route which the liquid would have to travel is so circuitous, owing to the break-joint formed by the shoulders F and J, that all danger from this source is done away with.

Having thus described my invention, what I claim is- 1. A filtering element. comprising a frame or support; a mass of compressed pulp held therein; and rims or rings forced into said previously-compressed pulp near its edges, substantially as described whereby a second compression is exerted upon that portion of the pulp beneath the rims or rings.

2. A filtering element comprising a frame or support; a mass of compressed pulp held therein; and a body forced down into said previously-compressed pulp near its edge, whereby said compressed pulp is further condensed and forced against its support.

3. The method of forming filtering elements which consists in placing a mass of pulp within a support, compressing the same overits entire surface, and finally condensing the compressed pulp around its edges where it contacts with the support.

4. The method of forming filtering elements which consists in placing a mass of pulp within a support, compressing the same over its entire surface, and finally forcing a body into the mass near its edge, whereby the edge is condensed and forced outward against the support, substantially as described.

5. In combination with a pan having an upstanding edge and a central boss; a mass of pulp compressed therein; and rims forced down into said mass near the boss and rim, whereby the mass is condensed at such points, substantially as described.

6. In combination with a pan having an upstanding edge and a central boss; shoulders extending in from said rim and boss; a perforatesupport resting within the pan below said shoulders; a mass of pulp compressed upon said support and having its edges extending over and upon said shoulders; and

rims embedded in the upper face of the mass over the shoulders.

7. In combination with a pan having an upstanding edge and a central boss; shoulders extending in from said boss and rim; a perforate disk mounted Within the pan below the shoulders; a mass of pulp compressed upon said disk and extending over the shoulders;

and an upper disk, having depending rings or rims at its edges forced down upon the upper face of the mass.

8. In combination with a pan having an upstanding rim and a central boss, the bottom of the pan inclining downwardly from the rim to the boss; shoulders projecting in from said rim and boss; perforate disk N and wire disk 0, placed within the pan below the upper face of said shoulders; a mass of pulp compressed upon said disks; a wire disk having depending rims Sforced down upon said com-' pressed mass; and a perforate disk placed upon said wire disk.

In witness whereof I hereunto set my hand in the presence of two witnesses.

JACOB F. THEURER.

Witnesses:

C. W. I'IENNING, H. C. GoErz.

Images