IMPROVEMENTS IN FILTERS
Year: 1884

page_text: We JOHN COULSON, Engineer, and WILLIAM ATHERTON TODD, Gentleman, both
of Stamford in the County of Lincoln, do hereby declare the nature of our
Invention for IMPROVEMENTS IN FILTERS to be as follows:-
The object of our invention is to provide improved means of cleansing the feed
water for boilers of portable and other steam engines, and ultilizing the water
arising from the condensation of the exhaust steam in the feeding of such boilers.
In carrying out our invention we provide two or three concentric vertical
cylinders, composed of perforated metal or wire work, and fitted with a cover
aboye and below to retain 'the same in position: The outer concentric space,
between the outer cylinder and the next one thereto, is filled with pebbles. The
next compartment within the foregoing, is filled with broken charcoal, in pieces
of suitable size. The next compartment is filled with slag wool, cotton waste, or
equivalent material, The central cylindrical space is left open. for the collection of
the filtered water, from whence it may be taken by the induction pipe leading to
the feed pump or injector of the steam boiler, or otherwise removed.
The filter is placed in a pail or other vessel which is supplied with feed water
from any convenient source.
It is well known that the condensed water from the exhaust steam of steam
engines usually contains greasy matter mechanically mixed therewith, which
renders the same unfit for use as feed water; and the water drawn from ponds and
other sources common to agricultural districts also contains mud and other
objectionable matter held in suspension; and our improved filter is especially suited
for filtering such water and separating the deleterious matter therefrom.
The flow of water is from the outside to the central receiver or cylinder, in a
horizontal direction, and the construction of the filter is such as to afford great
facility for cleansing the filter and renewing the filtering media as often as may be
found necessary.

page_text: COMPLETE
DIECIFICATION
+
We, JOHN COULSON, Engineer, and WILLIAM ATHERTON TODD, Gentleman, both
of Stamford, in the County of Lincoln, do hereby declare the nature of our said
Invention for " IMPROVEMENTS IN FILTERS" and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
The object of our invention is to provide improved means of cleansing the feed
water for boilers of portable and other steam engines, and utilising the water
arising from the condensation of the exhaust steam in the feeding of such boilers..
In carrying out our invention we provide two or three concentric vertical
cylinders composed of perforated metal or wire work, and fitted with a cover
above and below to retain the same in position. The outer concentric space,
between the outer cylinder and the next one thereto is filled with pebbles.
The next compartment within the foregoing, is filled with broken charcoal, in
pieces of suitable size. The next compartment is filled with slag wool, cotton
waste, or equivalent material. The central cylindrical space is left open for the
collection of the filtered water, from whence it may be taken by the induction
pipe leading to the feed pump or injector of the steam boiler, or otherwise
removed.
The filter is placed in a pail or other vessel which is supplied with feed water
from any convenient source.
It is well known that the condensed water from the exhaust steam of steam
engines usually contains greasy matter mechanically mixed therewith, which
renders the same unfit for use as feed water; and the water drawn from ponds
and other sources common to agricultural districts also contains mud & other
objectionable matter held in suspension; and our improved filter is especially suited
for filtering such water & separating the deleterious matter therefrom.
The flow of water is from the outside to the central receiver or cylinder, in a
horizontal direction, and the construction of the filter is such as to afford great
falicity for cleansing the filter and renewing the filtering media as often as may be
found necessary.
And in order that our said invention may be more particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which
símilar letters of reference indicate corresponding parts..
Fig 1 is an elevation of our improved filter; Fig 2 is a vertical section of the
same, and Fig 3 is a horizontal section a is the outer space which is filled with
pebbles, b is the next compartment, which is filled with charcoal, c is another
concentric compartment, filled with slag wool, cotton waste, or other suitable
material, and d' is the central reservoir from whence the filtered water is pumped
for use.
The filter is immersed in the water, when in use, and the feed water is drawn
from the reservoir d. When back water is delivered from the pump, it is forced
back by one of the pipes into the reservoir d and, by its action, the water drives
out any dirt or other matter which may have entered the spaces filled with
filtering materials. This effect is also sometimes caused by an additional pump
fitted up for the purpose.

page_text: We also fit a safety valve to the return pipe, to prevent an undue pressure
arising in the filter from the return water, whereby the filter might otherwise
be damaged.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is
1 The manufacture and use of filters for cleansing the feed water of steam
boilers, and utilising the back water for cleansing the filter, substantially as
described and shewn on the drawings.