Year: 1887

page_text: до соПРИТИСon of Fого.
I, RICHARD CLAYTON, managing Director of The Cannon Hollowware Company
Limited, of Deepfields in the County of Stafford, Ironfounders, 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, reference
being had to the accompanying drawing and the letters of reference marked thereon
(that is to say) :-
This invention has for its object improvements whereby a very simple and efficient
filter is provided which is capable of being most easily cleaned without disturbance of
the filtering material.
According to this invention the filter proper, or part through which the water
percolates for filtration, consists of a porous plate of carbon upon which a layer or
layers of filtering material or materials are placed, such as silver sand, fine charcoal,
granulated charcoal, and other suitable materials, and upon the top of which layers a
second porous plate of carbon is placed. The upper carbon plate serves to retain
much of the foreign matter in the water, and is readily brushed or wiped over to clean
it as it offers a firm surface to such operation. The water is further filtered as it
passes through the layer or layers between the plates, and the lower carbon plate
finally removes any fine particles remaining in suspension in the water, or which
have been taken up from such layer or layers.
The top and bottom porous plates are preferred to be of carbon, but either of them
(or even each of them) may be replaced by a porous plate of any suitable material,
such for instance as sandstone, or by a frame or perforated plate covered with any
suitable material such as asbestos cloth capable of preventing loose particles of filtering
material from passing through.
Having thus stated the nature of my said invention, I will proceed to describe,
with reference to the drawing herewith, a ready method of its practical application.
The drawing shews in vertical section a filter constructed according to this invention.
A vessel A, into which the water to be filtered is placed, and which is itself inserted
within an outer vessel B in which the filtered water collects has an outwardly
projecting rim a a by which it is carried within the outer vessel, and has an inwardly
projecting rim bb. Upon the rim bb rests the lower porous carbon plate c, and upon
such plate rests a layer or layers of filtering material or materials. Such may consist

page_text: of a layer of silver sand d, of fine charcoal e, and of granulated charcoal f, or of any
suitable material or materials. A porous carbon plate g is placed on the top of the
layer or series of layers and is preferably securely cemented in place, as is also the
lower carbon plate c. The inwardly projecting rim bb may be turned upwards, as
shewn, so that when the vessel A is removed from the outer vessel B and placed upon
the ground or rested in any position the lower face of the plate c will be prevented
from catching any dust or dirt.
No particular thickness of plates and layers is essential or specially advantageous.
I use at present carbon plates of about five-eighths (8) of an inch thick, and layers
of loose material of about half an inch thick each when three layers are employed.
I employ the word " filtering" when used as a qualification of the material or
materials between the porous carbon plates (or parts employed in lieu thereof as
aforesaid) as including not only materials which clarify the water by the mechanical
action of filtration, but also such as clarify or purify or clarify and purify by chemical
action.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is:-
A filter constructed with two porous carbon plates (or with a part or parts employed
as aforesaid in lieu, respectively, of one or both of such plates) having a layer or
layers of filtering material or materials between them, substantially as described,
for the purpose set forth.
Dad L 1
A
1000