USRE13053E - Filtes - Google Patents

Description

J. T. H. PAUL.

FILTER.

PPLIOATION FILED AUG. 1. 190s.

Reissued Dec. 7, 1909.

Mw 5 ,M M,

J. T. H. PAUL.

FILTER.

APPLIGATION FILED AUG. 1, y190s.

Reissuea Dec. 7, 1909. 1 3,053.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

JOHN T. H. PAUL, OF CHICAGO, ILLINOIS, ASSIGNOR TO E. GOLDMAN & C0. ING., OF CHICAGO, ILLINOIS, A CORPORATION' OF ILLINOIS.

FILTER.

Specification of Reissued Letters Patent.

Reissued Dec. 7, 1909.

Serial No. 446,501.

To all whom it may concern.'

Be it known that I, JOHN T. H. PAUL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Filters, of which the following is a specification.

My invention relates particularly to filters for use in filtering liquors, such as beer; and my primary object is to provide a filter composed of a plurality of cells, each cell having few parts, and the filter being of high capacity, well adapted to perform with thoroughness the function of filtration, and the filter-parts being capable of ready cleansing and, the construction being, therefore, sanitary in its nature.

The invention is illustrated in its preferred embodiment in the accompanying drawings, in whichd Figure 1 represents a broken vertical sectional view' of a filter constructed in accordance with my invention; F ig. 2, a broken plan view of a filter' pan employed; Fig. 3, a broken sectional view taken as indicated at line 3 of Fig. 2; Fig. 4:, a broken sectional view taken as indicated at line 1l of Fig. 2; Fig. 5, a view partly in section and partly in elevation of a conduit-section employed; Fig. 6, a broken perspective view of a packing-ring employed; Fig. 7, a sectional view of a pad or disk of filter material,whichperferably is preparatorily formed before insertion in the filter; and Fig. 8, a broken sectional view illustrating a slight modification.

In the construction illustrated, A represents a casing having a dished bottom A1 and a removable top A2; B, an inner baseplate supported on the casing bottoni A1; and B1, a series of filter cells located in the casing and forming with the cylindrical wall of the casing an annular chamber B2.

The casing A may be of any approved construction. In the construction shown, the casing bottom A1 is equipped centrally with an outlet conduit a and at some distance therefrom with an inlet conduit a1. The casing top A2 is shown connected with an external fiange at the upper end of the cylindrical body of the casing by bolts a2.

The inner base-plate B comprises a disk b equipped on its lower side with strengthening ribs b1 and provided at its center with a hollow hub or conduit-section b1. The conduit-section Z22 has a reduced portion b3 at its lower end which fits within the hollow boss of the casing bottom A1, and confined between the body of the conduitsection b2 and the adjacent portion of the casing bottom A1 is a gasket or packing b4. The conduit-section b2 is provided at its upper end with an annular groove receiving a gasket or packing b5.

Each cell B1 comprises a cell-pan, lor support, 56, whose bottom is provided with a central perforation; a conduit-section b1 eX- tending through said central perforation and provided externally with a fiange b5 which rests-upon the upper surface of the bottom of the pan; a packing ring of encircling the conduit-section and between which and the flange 21S the central portion of the pan-bottom is confined; a packingring 510 connected. with the lower outer margin of the pan-bottom; a packing-ring Z911 resting upon the upper outer marginal surface of the pan-bottom; and a filter mass, or disk of filtering material 612 which substantially fills the pan. The pan-bottom is provided at intervals with radial corrugations 513 joined by part circular corrugations b, as clearly appears from Figs. 2, 3 and 4f. The pan-bottom also has a fiat marginal portion 515 adjacent to the vertical flange b1 which constitutes the circumferential wall of the pan. The fiat marginal port-ion Z215 of the bottom is substantially in the plane of the upper portions of the corrugations, or, in other words, is raised with relation to the extreme bottom portion of the pan. The pan bottom has a central perforation Z217 and a marginal flat portion 61S adjacent thereto. The flat inner marginal portion L18 is substantially on a level with the lower portions of the corrugations of the pan-bottom, or, in other words, is depressed beneath the plane of the outer flat marginal portion 515 of the pan-bottom. The panbottom being corrugated, as described, has grooves on its upper surface which serve in collecting the filtered liquor and conducting it to the central outlet conduit, and has channels or grooves on its lower surface which serve in distributing the unfiltered liquor over the upper surface of the filtering material, or filter pad. As stated, the flange bs of the conduit-section bl bears upon Application for reissue filed August 1, 1908.

the upper surface of the inner marginal flat portion Z212 of the pan-bottom, and extending through the conduit-section are radial openings Z219 which register with the radial grooves which the corrugations 612 afford on the upper surface of the pan-bottom. The upper surface of the fiange Z28 affords a shoulder Z220, the flange acting as a packingring co-acting with the packing-ring Z22 of the filter cell above. The lower end of the lowermost conduit-section Z27 fits within the upper end of the conduit-section Z22, and the upper end of the lower-most conduit-section o7 receives the lower end of the next surmounting conduit-section, and so on. The packing-rings L10 are provided at their upper portions with radial perforat-ions Z221 which register with the radial grooves on the lower side of the cell pan bottoms. The packing-ring 510 on the lower side of the outer margin of each cell pan is of the right diameter to fit within the upper portion of the vertical flange of the cell pan beneath, shown. The disks of filtering material L12 are preferably preparatorily formed in a suitable press. Vhen the filter parts are assembled, the pads or disks Z212 are again placed under compression, the packingrings at the outer and inner margins serving to prevent seepage of the liquor along the vertical flanges of the cell pans, so that the liquor will be forced to filter through the filter pads. The corrugations in the bottoms of the cell pans are deep and relatively narrow, so that it is practicable to allow the pads of filtering material to rest directly upon the corrugations, thereby dispensing with the fiber-retaining screens which are common in filter construction, and, in the illustration given in Fig. 1, the lower side of the pad of one cell contacts directly with the corrugations in the bottom of the containing-pan, or support, and the upper side of said -pad contacts directly with the corrugations of the bottom of the next surmounting pan.

If desired, a fiber-retaining screen 622 may be placed upon the corrugated bottom of the cell pan beneath the filter-pad 512, as illustrated in Fig. 8. Vhere a pad of good quality and long fiber is employed, the fiber-retaining screen Z222 is unnecessary, however.

The casing top A2 is equipped centrally on its lower surface with a boss or bearing Z223 adapted to bear upon the upper end of the uppermost conduit-section Z21, and the boss Z223 is surrounded by a packing-ring Z221 which co-acts with the shoulder 520 of the uppermost conduit-section. The casing top is also equipped near its periphery on its lower side with a packing-ring Z225 which is received in the upper portion of the uppermost cell pan. The packing-ring Z225 is provided with radial perforations Z22G and the lower side of the casing top is provided with grooves Z227, enabling the liquor to be distributed over the upper surface of the filterpad in the uppermost cell.

The manner of assembling the parts of the filter will be readily understood. As stated, the pads or disks Z212 are preferably preparatorily formed before insertion inthe filter, but are subjected to pressure after insertion in the filter when the bolts L2 are tightened. In operation, the liquor enters through the conduit c1 and passes to all parts of the annular chamber B2, from whence it passes through the admission port-s b21 of .the several cells, being distributed `over the upper surface of the filter pads, whence it passes through the filter pads to the cha-nnels in the bottoms of the cell pans, from whence the liquor' escapes through the openings Z212 of the central conduit-sections.

The foregoing detailed description has been given for clearness of understanding only, and no undue limitation is to be understood therefrom.

lVhat I regard as new, and desire to secure by Letters Patent, is"- 1. In a filter, the combination of a plurality of cells, each cell comprising a cell pan, or support, having its bottomprovided on both sides with grooves, and provided centrally with a perforation, a conduit-section extending through said perforation, a packing-ring at the lower outer marginal surface of each cell pan bottom, the packing-ring of one cell pan being received in the upper portion of the cell pan beneath, and each packing-ring being provided with perforations, ports opening through said conduit-sections and communicating with the grooves on the upper sides of the cell pan bottoms, and filter-masses in said cell pans.

2. In a filter, the combination of a plurality of cells, each cell comprising a cell pan having a corrugated bottom affording grooves on both sides of the bottom, the bottom having a central perforation, a conduitsection extending through said perforation and equipped with an external flange serving as a packet-ring located above the upper marginal surface surrounding said perforation, said conduit-section having perforations communicating with the grooves on the upper surface of the cell pan bottom, a packing-ring surrounding the conduit-section beneath the cell pan bottom, a packingring at the lower outer marginal surface of the cell pan bottom provided with perforations communicating with the grooves on the under surface of t-he cell pan bottom, the last-named packing-ring of each cell pan bottom being received in the upper portion of the cell pan beneath, and a filter-mass confined between the bottom of each cell pan and the lower surface of the bottom of the next superposed cell pan.

3. In a filter, the combination of a plurality of cells, each cell comprising a cell pan having a corrugated bottom provided with a central perforation and having a raised flat outer marginal portion and a depressed flat inner marginal portion, a conduit-section having an external flange bearing upon the upper surface of the inner marginal portion of the cell pan bottom, said conduitsection having perforations communicating with the grooves on the upper surface of the cell pan bottom, the lower portion of the conduit-section being of a reduced diameter, a packing-ring on the conduit-section beneath the lower surface of the inner margin of the cell pan bottom, a packing-ringapplied at the lower surface of the outer marginal portions of the cell pan bottom and provided with perforations, said last-named packing-ring of one cell pan bottom being received within the upper portion of the cell pan beneath, and a filter-mass in the cell pan confined between the cell pan bottom and the lower surface of the bottom of the next superposed ccll pan.

4. In a filter, the combination of a plurality of filter-cells, each cell comprising a cell pan, or support, having a corrugated bottom and a central perforation, and having a ra vsed flat outer marginal portion and a depressed fiat inner marginal portion, a conduit-section extending through said central perforation and having an external flange bearing upon the upper surface of the inner marginal portion of the cell pan bottom, and perforations extending therethrough and communicating with the grooves on the upper surface of the cell pan bot-tom, a packing-ring encircling the conduit-section and bearing against the lower surface of the inner marginal portion of the cell pan bottom, a packing-ring bearing upon the upper surface of the outer marginal portion of the cell pan bottom, a packing-ring applied at the lower surface of the outer marginal portion of the cell pan bottom and provided with porforations communicating with the grooves on the lower side of the cell pan, and filter masses in said cell pan.

In a filter, the combination of a plurality of cells, each cell comprising a cell-pan, o1' support, having a bottom provided with deep and narrow corrugations and provided centrally with a perforation, a conduit-seetion extending through said central perforation, packing-rings above and beneath the cell pan bottom at said conduit-section, packing-rings above and beneath the cell pan bottom at the outer marginal portion there.- of, and a disk of filtering material in o1' on each cell-pan, or support, and resting directly upon the corrugated bottom thereof.

(i. In a filter, the combination of a casing having a central outlet conduit, an inlet conduit, and a plurality of cells within said casing and forming with the cylindrical wall of the casing an annular chamber, each cell comprising a cell pan having a corrugated bottom and a central perforation, a conduit-section extending through said central perforation and having an external flange forming a packing-ring at one side of the cell pan bottom, a packing-ring applied to the conduit-section at the opposite side of said cell pan bottom, said conduitsection having perforations and communieating with the grooves on the under surface of the cell pan bottom, a packing ring applied to the upper surface of the outer marginal portion of the cell pan. bottom, a packing-ring applied to the lower surface of the outer marginal portion of the cell pan bottom, said last-named packing-ring having perforations communicating with the grooves on the lower side of the cell pan bottom, the last-named packing-ring of one cell pan bottom being received within the upper portion of the cell pan beneath, and a single pad of filtering material confined in each cell pan.

T. In a filter-cell, the combination of a cell pan, or support, having a corrugated bottom. and provided with a central perforation, the bottom of said cell pan having an elevated flat marginal portion adjacent to the vertical fiange of the cell pan and having a depressed flat marginal portion surrounding the central perforation, a packing-ring applied to the lower surface of the cell pan bottom at the outer fiat marginal portion thereof and provided with radial openings, an externally fianged conduit-section extending through said central perforation, the flange bearing upon the upper surface of the inner fiat marginal portion of the cell pan bottom, the conduitsection having radial perforations communicating with the grooves on the upper surface of the cell pan bottom, and a packing-ring applied to the conduit-section at the lower surface of the inner flat marginal portion of the cell pan bottom.

8. In a filter-cell, a cell pan having a corrugated bottom and a central perforation, a packing-ring applied to the lower surface of the outer marginal portion of the cell pan bottom and having openings therethrough communicating with the grooves on the lower surface of thecell-pan bottom, and a conduit-section extending through said central perforation and provided with perforations communicating with grooves on the upper surface of the cell-pan bottom.

9. In a filter cell, a cell-pan, or support, having a. bottom provided with corrugations and with a central perforation and provided with a flat raised outer marginal portion and a flat depressed inner marginal portion, a packing-ring applied to the lower surface of said outer flat marginal portion of the cell pan bottom and provided With openings extending therethrough, a conduitsection extending throughsaid central perforation and having an external flange bearing upon the upper surface of the inner marginal portion of the cell pan bottom, said conduit-section having perforations therethrough communicating with the grooves on the upper surface of the cell pan bottomr` and a packing-ring encircling said conduit-section and bearing against the lower surface of the inner marginal portion of the cell pan bottom.

10. In a filter, the combination of a casino' a plurality of superposed filter cells @a therein and forming therewith an annular

Images