Improvements in Feed-water Filters.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Feed-water Filters.
I, EDGAR CONISTON MILLS, of No. 40, Victoria Buildings, Manchester, Consulting
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
The main object of iny invention the extraction of oil or grease from boiler
feed-water, but it may also be used to remove other impurities.
Within a suitable cylindrical vessel provided with a removable cover I place one
or more removable perforated filter boxes. The lower outer edge of such box makes
a joint with the interior of the vessel by contact of their surfaces, pressure being
applied for the purpose by a screw or screws passing through the cover.
box is provided with a loose bottom dished cover with a deeper central perforated
The filter-
portion and drawn and held to place by means of a suitable central bolt. The
perforated sides and top of the filter-box are preferably ribbed internally and may be
provided with a wire web to sustain the filter cloth which is in the form of a bag,
held centrally by a nut and washer on the central bolt or by other equivalent device,
and its lower edge by an expanding spring or cap.
box is filled with a suitable absorbent medium which may be fine wood-shavings,
The whole of the interior of the
sawdust, charcoal, coke or other substance. The filter-box cover is so designed as to
further compress this material after filling by forcing the cover into position tele-
scopically.
The feed-water enters an inlet branch formed below the vessel and is led to
a central opening into the vessel below the dished cover of the filter-box. Thence
it enters the filter-box through the deeper perforated part of the said cover and
must pass through the full thickness of the absorbent material before reaching the
filter cloth and passing through it to the annular space surrounding the box and
thence to the final delivery.
At the lowest part of the inlet branch, which is enlarged for the purpose, I place
the usual blow-out valve.
In re-charging the filter, the cover being removed, the internal box is lifted out
by means of suitable eye bolts, and being inverted the dished box cover is removed,
he absorbent material and filter bag withdrawn.
nserted and filled with material the dished cover is replaced and the charged box
A new or cleaned bag having been
gain placed in the vessel.
After the cover joint is made good the tightening screw or screws to make the
nternal box joint are screwed home.
By use of a duplicate internal box the time necessary for re-charging is much
educed.
When desired I provide a by-pass within the lower part of the vessel and control
by suitable valves.
Dated this 30th day of June 1899.

page_text: I, EDGAR CONISTON MILLS, of 40, Victoria Buildings, Manchester, Consulting
Mechanical Engineer, 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 :-
The main object of my invention is the extraction of oil and grease from boiler
feed-water, but it may also be used to remove other impurities.
In the accompanying drawings (a) represents a cylindrical vessel forming the body
of the filter and it is provided with a removable cover (b). (c) is a removable
perforated filter box whose lower edge (c¹) makes a joint with the true surface (a¹)
formed on the floor of the body (a). The screw (d) passing through the cover (b) is
for the purpose of putting pressure upon the box (c) and maintaining the joint.
between (c) and (a¹).
The box (e) is provided with a loose cover (e) formed with a perforated dome and
held in position by the central bolt (f) and nut (f¹). The inside of the perforated
box (c) may be ribbed and provided with a wire web (g) to sustain the filter cloth (h)
which is made in the form of a bag. It is held centrally by the washer (f¹¹) and
nut (f) and its outer or lower edge may be held by an expanding spring (m) or
other suitable device.
The whole of the interior of the box (c) is filled with a suitable absorbent
medium (i) which may be fine wood shavings, sawdust, charcoal, coke or other
substance. The filter box cover (e) is allowed to enter the box to a certain depth so
as to further compress this material after filling by forcing the cover into position
telescopically.
The inlet branch is at (k) and leads to chamber (¹) under the floor of the body (a)
in which a central hole (11) is formed under the perforated dome of the cover (e).
Connected with the chamber (k) and at its lowest part. I form the passage (111) leading
to the usual blow-out valve.
When in use the feed-water enters the branch (k) and by means of chamber (k¹)
and hole (k) passes to the dome and so through the full thickness of the absorbent
material (i) to the cloth (h) through which it must also pass to the exterior of the
box (c) and so to the final outlet (1) from the body (a).
In re-charging the filter, the cover (b) being removed the box (c) is lifted out and
being turned over its cover (e) is removed and the medium (2) and cloth or bag (h)
withdrawn. A new or cleaned bag being inserted and secured by the nut (f) and
washer (f) and the material (i) having been packed evenly and tightly in the
cover (e) is replaced, and by screwing down the nut (1) the material is still more
tightly packed. The charged box (c) is now replaced in the body and the cover (b)
bolted down, its joint being made good. The screw (d) is then tightened down upon
the top of the box (c) and locked down by its lock-nut (d').
:
By use of a duplicate box (c) the time necessary for re-charging is much reduced.
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 :-
1. The removable perforated box having perforations on the top and sides, and
containing a filter cloth or bag substantially as and for the purposes herein before
described and illustrated in the accompanying drawing.
2. The combination of the removable perforated box with the filter bag or cloth
lining and the contained mass of absorbent material substantially as and for the
purposes herein before described and illustrated in the accompanying drawing.

page_text: 3. The removable perforated box with the filter bag or cloth lining and the
contained mass of absorbent material having a sliding or telescopic cover substantially
as and for the purposes herein before described and illustrated in the accompanying
drawing.
4. The filter cloth or bag and the telescopic cover for the removable perforated box
secured by nuts and washer upon the one central bolt substantially as and for the
purposes herein before described and illustrated in the accompanying drawing.
Dated this 30th day of March 1900.
EDGAR C. MILLS.