Improvements in Filters.
Year: 1893

page_text: Date of Application, 11th Apr., 1893
Complete Specification Left, 11th Jan., 1894-Accepted, 24th Feb., 1894
Improvements in Filters.
I, WILLIAM JAMES HOWIE ADAM, Manager, of 129 Kenmure Street, in the
City of Glasgow, do hereby declare the nature of this invention to be as
follows
This invention relates to improvements in filters and whilst generally applicable
for filtration purposes it is especially so for the filtration of feed water to steam
generators, the filtration of sewage water and the like.
The apparatus constituting this invention consists of an outer cylinder having an
inlet and outlet branch. The inlet is shut off from direct communication with the
outlet by an internal perforated cylinder or tube upon which is carried two or more
layers of filtering cloth and wire gauze meshing placed between perforated plates,
having distance pieces, whereby the pressure of the water on each layer of cloth is
reduced to a minimum. The internal tube or cylinder may be plain, fluted or
corrugated and it may be straight or conical in shape.
The arrangement may also be varied by substituting a series of cones for the
internal tube or cylinder. A sludge cock is provided in conjunction with the
external cylinder by operating which the cleaning of the filter is effected whilst it
is at work, and an air vessel and extractor is also fitted to the said cylinder whereby
light oily material is extracted whilst the apparatus is in operation.
Dated this 10th day of April 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
Improvements in Filters.
I, WILLIAM JAMES HOWIE ADAM, Manager, of 1 Keir Terrace, in the City
of Glasgow, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
This invention relates to improvements in filters and whilst generally applicable
for filtration purposes it is especially so for the filtration of feed water to steam
generators, the filtration of sewage water and the like.
The apparatus constituting this invention as illustrated by Figure 1 of the
accompanying drawings consists of an outer cylinder A having inlet and outlet
branches B and C. The inlet is shut off from direct communication with the outlet
by an internal perforated cylinder or tube D around which is wrapped one or more
layers of wire gauze meshing E and filtering cloth F through which the liquid passes.
The upper end of the internal perforated cylinder D is in this case attached to
the outer cylinder cover G by a bayonet joint or any other convenient mode of
fastening may be employed, and its lower end rests upon rings carrying layers of
filtering cloth H and wire gauze I said rings resting upon a perforated disc J
carried on a ring K formed on the cylinder A. The cylinder cover G may be
domed if desired and between the dome and a perforated plate L secured thereon
any absorbent material may be placed. A sludge cock is provided at M in con-
junction with the external cylinder A by operating which the cleaning of the filter
Price 8d1

page_text: is effected, and an air vessel and extractor is also fitted to the said cylinder at N
whereby light oily material is extracted whilst the apparatus is in operation.
The internal perforated tube D is shewn with a plain surface but it may be
fluted or corrugated or as shewn by Figure 2 it may consist of two perforated
cylinders or tubes D, D' in which case the cylinder D' surrounds the cylinder D,
annular distance pieces or rings O being placed between them for the purpose of
strengthening the structure and of providing an additional liquid space. The lower
ends of the cylinders D, D' are dome shaped and the outer cylinder D' rests upon
a ring or seat K formed on the outer cylinder A.
Figure 3 shews a modification of the filter in which two perforated cones D, D¹
are employed. The cones rest at their lower ends upon a ring or seat K formed on
the cylinder A and are forced tightly thereon by means of a clamping screw P
carried through a stuffing box in the cover G and which bears against the upper
end of the outer cone D¹.
Figure 4 shews a modification in which the cones D, D' are placed base to base
and separated by a loose circular grid. Q the lower cone D resting with its lower
end upon a ring or seat K formed on the outer cylinder.
Figure 5 shews a further modification in which the outer casing A is spherical,
a perforated hollow sphere D, covered with layers of wire gauze and filtering cloth,
being secured at the outlet branch C.
Figures 6, 7 and 8 shew various positions of the apparatus on the feed pipe of a
boiler.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A feed water or other filter constructed substantially as described under several
modifications with reference to the drawings annexed.
Dated this 10th day of January 1894.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.