Improvements in Feed Water Filters and Oil Separators for Steam Generators.
Year: 1895

page_text: Date of Application, 20th May, 1895
Complete Specification Left, 18th Feb., 1896-Accepted, 21st Mar., 1896
PROVISIONAL SPECIFICATION.
Improvements in Feed Water Filters and Oil Separators for Steam
Generators.
I, CHARLES WILLIAM ALEXANDER TAYLOR, of Industries Street, Kirkintilloch,
Engineer, do hereby declare the nature of this invention to be as follows :-
This invention relates to devices for filtering and purifying the feed water for
steam generators and its object is to improve their construction.
In carrying out my invention I use a, preferably, cylindrical casing having a box
at one side in which is, at one part, an inlet for the unfiltered feed water, and, at
another part, an outlet for the filtered water. Between the outlet and the inlet is
a dividing web provided with a passage way which can be closed when necessary or be
opened so as to supply water direct to the boiler without passing through the filter
by means of a screw down valve. A screw down valve is also used to regulate the
supply of feed water to the interior of the casing and another screw down valve to
regulate the outflow. These valves are, preferably, each actuated by means of a
toothed wheel which turns nut-like on the screwed outer end of the spindle of each
valve. Each wheel is carried in a bearing bracket fitted on the box aforesaid.
The toothed wheels are made to gear with one another in such manner as to ensure
that when the inlet and outlet filter valves are open the centre direct supply valve
is shut and vice versa.
Fitted removably in the casing are a number of filters of such shape, in plan
view, that they appear as segments of a circle. The segmental filters may be of
triangular, quadrantal or like form in cross section. Each filter is preferably
passed through a correspondingly shaped hole in a supporting plate at the top of
the casing and made to hang therefrom. On the top of the casing is a cover which
may be of dome shape and be held in place by bent snugs which catch on the
shanks of the fastening bolts or studs of the casing in such manner that by merely
slackening the nuts the cover can be turned slightly and then lifted off without
taking out the bolts or removing the nuts.
Each filter preferably consists of a hollow brass or other metal perforated frame
of prism shape having openings at the ends and covered with flannel, fibre, matting,
or other suitable filtering material.
When necessary the filters can be easily removed for cleaning or renewing
purposes by merely taking off the cover and then pulling out any one or more of
the suspended filters, or the whole of the filters can be removed in a body along
with the supporting plate.
Under another arrangement the filters may be supported on a bottom plate fitted
in the casing and be held in place at top by means of a screw or other clamp
provided with arms corresponding to the number of filters and at the bottom by
means of pins or projections on the supporting plate.
A central pipe may be led up through the casing and filter and be provided with
a screen dish or receptacle at its upper end and a drain cock at its lower end.
The improved filter whilst being both compact and cheaply constructed gives a
great filtering surface. The filters can also easily and quickly be cleaned or
renewed.
If desired the filter may be arranged horizontally.

page_text: A safety valve may be fitted either in the web at the interior of the valve or a
the outside as usual.
Dated this 18th day of May 1895.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
DIECIFICATION.
Improvements in Feed Water Filters and Oil Separators for Steam
Generators.
I, CHARLES WILLIAM ALEXANDER TAYLOR, of Industries Street, Kirkintilloch,
Dumbartonshire, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to devices for filtering and purifying the feed water for
stean generators and its object is to improve their construction.
And in order that my said invention may be properly understood I have hereunto
appended two explanatory sheets of drawings, whereon,
Fig. 1 is a side elevation, with part in section of the filter.
Fig. 2 is a vertical section of the filter.
Fig. 3 is a plan of the filter with its filters o and cover r removed.
Fig. 4 is a plan of the cover.
Fig. 5 is a side elevation and Fig. 6 a vertical section of a modification.
Fig. 7 is a plan and Fig. 8 a side view of one of the filters o.
In carrying out my invention I use a, preferably cylindrical, casing a having an
extension b, cast on it at one side, in which is an inlet c for unfiltered feed water,
an inlet d to the interior of the casing a, and a passage way e leading direct from
the inlet c to the boiler by means of the pipe f, the passage g in the extension a
at the upper part of the casing a, and the pipe h. The extension a' has a passage g¹
leading from the interior of the casing a¹ to the passage g. The passage e leading
from the inlet c to the pipe f can be closed when necessary by the screw down
valve i. A screw down valve j is also used to regulate the supply of feed water to
the interior of the casing a and another screw down valve k to regulate the outflow
therefrom. The spindles ', k', of these valves are in line with each other and are
screwed at their ends, as shown, one with a right hand screw thread and the other
with a left hand screw thread. Carried in a bracket is a nut cut with right and
left hand screw threads to work on the screwed ends of the spindles aforesaid.
This nut, which is capable of being turned by the hand wheel 12, is provided at its
lower end with a toothed wheel m which gears with a toothed wheel n fitted on a
nut carried by a bracket and working on the screwed upper end of the spindle i
of the valve i. The valve spindles, as shown, pass through stuffing boxes.
Fitted removably in the casing a are a number of filters o of such shape, in
plan view, that they appear as segments of a circle. The segmental filters of
which there may be 6, or other suitable number are made of sectoral or triangular
form in cross section and in outside view they appear as shown at Figs. 7 & 8.
Each filter is passed through a correspondingly shaped hole o¹ (see plan view
Fig. 3) in a supporting plate p at the top of the casing and made to depend
therefrom by means of flanges o' which rest on the plate and its radial bars p'.
The filters are held in place by a ring 9 actuated by a screwed spindle q¹ passed
through the cover r of the casing and having a hand wheel 9. This cover ris
held in place by slotted or bent snugs (see Fig. 4) which catch on the shanks
of the fastening bolts or studs of the casing in such manner that by merely
slackening the nuts of these bolts the cover can be turned slightly and then lifted
off without taking out the bolts or removing the nuts.

page_text: Each filter o consists of a hollow brass or other metal frame of prism shape being
closed at the lower end but open at the upper end and perforated with holes of in
each side. Each filter is covered round about with flannel, fibre, matting, or
other suitable filtering material s. Each filter is made with a cross bar s' (Fig. 7)
at its upper end by which it can be lifted up and taken out of place when
necessary.
When necessary the filters can be easily removed for cleaning or renewing the
filtering material by merely taking off the cover and then pulling out any one
or more of the suspended filters o or the whole of the filters can be removed in a
body along with the supporting plate p.
With this arrangement, when the wheel is turned in one direction, the valves j
and k are simultaneously opened and the valve i closed so that feed water from the
inlet e passes into the passage d and fills up the casing a filtering through the
materials into the interior of the filters. From thence it passes up through their
open upper ends to the passages 9', 9, and the boiler feed pipe h. When the
wheel is turned in the opposite direction the valves and k are shut down and
the valve opened so as to supply water from the inlet c direct to the pipe h and
boiler without being filtered. This is only necessary whenever the filter becomes
badly clogged or is undergoing cleaning or repair. The arrangement of valves
prevents the possibility of all the valves being closed at one time, or of the valve k
being closed whilst the valve j is open or of both valves j and being open at the
same time. Further it is a great advantage to have all the valves operated from
a single hand wheel 1.
The improved filter whilst being both compact and cheaply constructed gives a
great filtering surface. The filters o can also easily and quickly be cleaned or
renewed.
Figs. 5 and 6 show a slight modification wherein the valves j, k, i, are all
actuated from a single screw spindle t with handle t'. In this arrangement the
casing a has a valve box u cast on it at one side in which the three valves are
arranged one above the other. The valve k is fitted to the spindle t in the usual
way but it has a downwardly projecting spindle 2 cast to its bottom and this
spindle screws right through the valve i its projecting end being screwed into
the head of a short spindle to which has, at its lower end, a disc t³ caught freely
by bent lugscast on the back of the valve j.
h is the outlet for filtered water and c the inlet for the unfiltered water.
With this arrangement, when the wheel this turned in one direction, the valves k
and jare opened whilst the intermediate valve i is closed so that water entering
at c passes into the chamber c' and thence to the filters o through the valve j and
passage d escaping again through the passage g¹ and valve k to the pipe 7. When
the wheel is turned in the opposite direction the valves j and k are shut and the
valve i opened so that water passes direct from the pipe c and chambers c' to the
chamber hand pipe without passing through the filter.
In Fig. 6 the filters o are shown with the materials thereon.
If desired the filter may be arranged horizontally.
A safety valve may be fitted on the apparatus.
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
consider novel and desire to claim is
1 Th

page_text: 4. The modified arrangement of valve gear substantially as hereinbefore
described and shown at Figs. 5 and 6 of the drawings annexed.
5. The combination of the casing a, the filters o fitted removably therein, the
fastening bolts or studs of the casing and the removable cover with its snugs ri
for catching on the bolts or studs, substantially as hereinbefore described and
shown on the drawings annexed.
Dated this 17th day of February 1896
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.