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Jam. 7, 1947.
Filed Jan. 19, _1945
Patented Jan. 7, 1947
Walter Kasten, Franklin, Mich., assigner to Ralph
L. Skinner, Detroit, Mich.
Application January 19, 1945, Serial No. 573,524
1 Claim. (Cl. 18S-44)
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
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
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.
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
23 and the upper layer of the filter-element prop
er, these parts desirably being cemented or ad
hered together.
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.
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