Jam. 7, 1947. „ KASTEN ` FIL'I'E'IR ` y Filed Jan. 19, _1945 - 2,413,769 v , @5% IN VEN TOR. W. 2,413,769 Patented Jan. 7, 1947 UNITED STATES PATENT OFFICE 2,413,769 FILTER Walter Kasten, Franklin, Mich., assigner to Ralph L. Skinner, Detroit, Mich. Application January 19, 1945, Serial No. 573,524 1 Claim. (Cl. 18S-44) l The pre-sent invention relates to certain struc tural and functional features involving novelty and originality in nlters for various types of uses, one especially being the ñltering and puri ncation of the exhaust or combustion gases of internal-combustion engines or motors, whereby to precondition such gases for subsequent test ing or analysis for determination of whether the ¿carburetor of the engine and its explosion char 2 su’ch member II having an internally-screw threaded, round cavity or chamber I3 with a lower open end or mouth in which is screwed the upper, open, terminal portion of a round metal shell or casing I4 with an appropriate, resilient, pressure-sealing gasket I5 between the bottom face of the body II and the top surface of an apertured flange IE depending around the upper portion of such shell, and by means of acteristics are the most favorable and emcient li) which the latter may be readily turned to screw it for the operation of the engine. Such emitted gases ordinarily contain some lubricant, water and extremely line particles, such as smoke, tars, etc., suspended in the gases, especially when ethyl-gasoline is used, and these should be effectively and adequately removed or eliminated to render the later analysis a pro cedure which will produce most reliable results. One leading aim and primary purpose of the invention is the provision of a ñlter of such char acter that it will segregate out all of such con taminating ingredients to allow the analysis to proceed with the accomplishment of wholly trust worthy conclusions and deductions. Another object of the invention is to supply a filter of this general type and style which is -simple in construction. which is relatively inex pensive to produce, and which is unlikely to be into place. The innovatory, edge-ñltration filter-element enclosed in such casing includes an inverted, cup shaped, round, metal bottom-closure I1 having an outstanding, flat, marginal flange I8 on which, and preferably adhered or cemented to the top surface of which, is a ring-shaped, resilient, neo prene or other suitable gasket I9, and above, and bearing on, such gasket and desirably adhered thereto, is an elongated, cylindrical, hollow fil ter-body ZI composed of either a stack or pack of Washer-shaped, registered, paper or cellulose discs, or a helically-wound paper or other ribbon with its plurality of layers in registration and in face-to-face contact with one another, but, in either case, the paper or other material thereof is impregnated with a suitable varnish, plastic, resin, or other appropriate agent protecting the material which it permeates against detrimental come damaged 0r injured in ordinary service. So that those acquainted with and skilled in 3 0 action thereon by any of the materials or sub-stances with which it will come in contact in this art may understand the new structure and service, such agent acting additionally to adhere mode of operation of a present approved embodi said paper or other cellulose layers together, but ment of the invention, such a filter has been illus not closing the shallow spaces or gaps between trated in detail in the accompanying drawing, forming a part of this specification, and to which 35 the layers through which the filtrate passes in wardly of the filter to its hollow interior, reference should be had in connection with the Internally of the filter-member 2| and spaced following full and complete description. inwardly away from its inner surface, a uniform In this drawing, in which the same parts have ly-perforated, cylindrical metal tube 22 is sol been designated with like reference numerals 40 dered or otherwise adhered at its lower end to, throughout the yseveral views'thereof: and concentric with, the bottom-closure I'I, such Figure l is an.elevation of the complete filter; multi-apertured tube extending upwardly Figure 2 is a central, longitudinal, vertical sec through a downwardly-flanged metal ring 23 sol tion through the filter on a larger scale; dered to the underside of, and in register with, a Figure 3 is a cross-section on line 3-3 of Figure metal-ring 24 having external and internal 2, the parts 4being viewed in the direction indi 45 flat projections 25 and 26, respectively, such inner cated by thev arrows; and lugs 2t spacing the double-ring 23, 24 equally Figure 4 is a perspective view of two united and uniformly outwardly yaway from the top part elements of the filter partly broken away to more of tube 22, the external lugs 25 engaging the un clearly show the construction. upper portion of the circular wall of Referring “to such drawing, it will be observed 50 threaded chamber I 3 thereby holding the filter-member that the novel and improved ñlter includes a »centered in the casing, neoprene gaskets 21, 28 top vcasting or body II adapted to be suitably being present between the top face of ring 24 mounted and supported in position, by means, and the under-surface of the end-wall of cham now shown, extended through a pair of horizon tally-apertured ears I2, I2, the lower portion of 55 ber I3 and also between the bottom face of ring 2,413,769 3 23 and the upper layer of the filter-element prop er, these parts desirably being cemented or ad hered together. 4 22 through which they must automatically flow to escape to the discharge-pipe. The secondary medium of finely-spun ñber The circular or annular space between the ele glass filaments o-r similar substance has an af ments 2l, 23, and 2li, and the perforated or fo ñnity for water and moisture which it removes raminous member 22 is completely occupied by from the gas undergoing treatment, and in this compacted, line-spun liber-glass 129, such open connection it should be borne in mind that the top apertured~conduit 22 being in register with direct enclosure of such spun-glass body by the and discharging the filtrate upwardly into a cav surrounding and eonñnîng edge-filtration filter ity 3i in the block ll communicating through a 10 2l with its numerous, spaced-apart, extremely passage 32 with a discharge-pipe 33. shallow, annular, thin gaps or passages provides As will readily be perceived from Figure 2 of a very enicient distributor and subdivider of the the drawing, the filter-member as a whole is nor gases before they reach the spun-glass, so that mally maintained forced up into position by a the entire external area of the glass body func coiled-spring 3ft bearing on the inside of the 10W tions evenly, efñciently, and effectively, er end of shell M and pressing up against the Another advantage resulting from the use of underside of the end«closure I7, such lower .por the two medía is that the über-glass alone would tion of the elongated shell or casing having a allow channelling, that is, would allow the par manually-controlled valve 35, the opening of ticles to follow the same path of least resistance which permits the accumulated, trapped contents 20 through the filter, but the use of the primary in the bottom portion of the shell to be drained iilter directs the iiow to the secondary iilter, thus ofi as occasion requires, whereupon the valve may eliminating this trouble, and, in addition, the be again closed. _ primary medium adds materially to the useful life The admission or inlet pipe 35 delivers the con of the secondary or glass medium by coagulating taminated fluid to be ñltered under pressure 25 and removing many particles which would tend through the passage 31 into the casing I4 out to clog the extremely ñne and minute passages side of the älter-member as isA common practice. through the spun-glass layer. The outstanding novel structural features of I claim: this -ñlte'r and its particularly valuable functional In a hollow edgeèñltration ñ1ter~elernent properties reside in substantial measure in the formed of a series of registered layers of rugose duplex character of the compound ñlter- in that, surface, substantially fluid-impervious material in when the iilter, operating on the exhaust gases face-to-face contact with one another providing or the products of combustion from an internal separated shallow filtering spaces between such combustion engine, for example, both the outer layers through which the filtrate of said element or external edge-filtration filter 2| and the in passes, and means closing one end of such filter ner “through” liber-glass filter coact with one element, the other end of the filter-element re another in an unusual manner, each to improve maining open as' a discharge-port, the'novel corn and modify the performance of the other. bination of a substantially uniformly apertured That is to say, the outer íilter, compo-sed of the tube inside of and spaced inwardly away from registered face-to-face contacting, adhered-to 40 the inner surface of said filter-element and in gether layers of the impregnated' rugose-surface communication with said discharge-port, and paper of other comparable cellulose material, acts compacted spun-glass having an añinity for water to more or less coagulate and to i'ilter out the lu and moisture ñllîng the space between said filter bricant o-r oil from the gases, and this function element and said tube, whereby in the treatment is facilitated as to evenness and equality due to 45 of internal-combustion engine exhaust gases said the fact that the gases undergoing treatment are ñlter-element acts to more or less coagulate and forced under pressurev through such edge-filtra iilter out the lubricant or oil from the gases, and tion filter, and the evenness or uniformity of dis also functions as a substantially uniformly acting position of such gases While undergoing treatment distributor'for the gases undergoing filtration beis facilitated and augmented by the presence and 50 fore they> reach said spun-glass and prevents action of the central, uniformly-apertured tube channeling through the latter. WALTER KASTEN.