Year: 1898

page_text: I, GEORGE FREDERICK REDFERN, of the Firm of G. F. Redfern & Co., The General
Patent Office, No. 4, South Street, Finsbury, in the County of London, Patent Agents,
do hereby declare the nature of this invention (a communication to me by George
Alfred Abbott, of 486, Collins Street, Melbourne, in the Colony of Victoria, Australia,)
to be as follows:-
This invention relates to improvements in filters.
According to the invention I construct the filter of a chamber of suitable size, shape
and material and provided with inlet and outlet openings for the liquid to be filtered.
The inlet opening is advantageously arranged laterally and the outlet opening is
formed in the bottom of the chamber.
The filtering medium consists of a block composed of washed clay and lignite which
is leaded or otherwise suitably cemented in the chamber so that no liquid can flow
through the filtered water outlet except through the block.
In conjunction with the chamber I further provide a device for cleansing the filtering
medium, such device consisting of one or more brushes adapted to be rabbed over the
top of the said medium so as to remove any deposit the said deposit being then
discharged through a suitable outlet.
The brush or brushes is or are preferably mounted upon a spindle which passes up
through a stuffing box in the cover of the filter chamber and is provided with an
external handle whereby it can be turned, and the said cover is advantageously
screwed into, or otherwise detachably connected to, the filter chamber. A spring
may also be provided for holding the brush or brushes against the surface of the filtering
medium.
TY

page_text: Agents, do hereby declare the nature of this invention (a communication to me by
George Alfred Abbott, of 486, Collins Street. Melbourne, in the Colony of Victoria,
Australia, Plumber,) and in what manner the same is to be performed, to bę par-
ticularly described and ascertained in and by the following statement:-
My improvements have been designed for the purpose of producing a germ proof
filter which can be readily connected with any water supply service pipe or with any
vessel containing liquid. The filtering medium is composed of clay and lignite
secured in position in a circular metal filter casing in such a manner that although
watertight it can be easily removed for cleansing purposes or for being replaced.
Within the filter casing, and resting on the filtering medium is a rotatable scraper or
brush. The filter casing has a supply chamber provided with two branches, one for
connection to the service pipe and the other for drawing off non-filtered water
whilst the space or chamber at the other side of the filtering medium has a branch
for drawing off the filtered water.
To enable the said invention to be fully understood I will describe the same by
reference to the accompanying drawing in which :-
Figure 1 is a face view of a filter embodying my improvements; and
Figure 2 a central section on line x-x Figure 1.
Similar letters of reference indicate corresponding parts in the several figures.
A is a cylindrically shaped metal casing or box having a closed end a and provided
with a cover B furnished with an internal rimb to receive the filtering medium C the
cover B being secured in position by a screwed annulus or coupling ring D. As
shewn in Figures 1 and 2 the filtering medium is in the form of a disc and the
casing A has a branch A¹ for connection to the water supply source and a branch A²
through which to draw off non-filtered water, and it also has a gland and stuffing
box A³ to receive the spindle E of a scraper piece which is made up of say three
arms El carrying brushes or scrapers E°, the said scraper piece being acted on by a
spring E2 whilst the spindle outside the casing is furnished with a handwheel E³.
The cylindrical casing A at its open end is bored out to receive the rim within which
latter the filtering disc C is loosely arranged and the inner edge of both the disc C
and rim bear upon an india rubber ring F seated on a shoulder a² of the casing A
so that when the cover B is acted upon by the coupling ring D the ring F makes a
watertight joint around the edge of the filtering medium. It is to be understood
that the arrangement herein before described for fixing the filtering medium in position
forms the subject matter of an application for a patent of later date than this
application and that therefore no claim is made in respect thereof in this
application.
C
B' is a water chamber between the back of the filtering disc C and the cover B,
the said chamber receiving the water which filters through the disc C and having a
discharge branch B2, segmental bearers or supports 6' being formed on the inside of
the cover to afford passages for the filtered water to flow between the disc and the
said cover.
D', D are studs formed on the coupling ring d to permit of a key being
applied for screwing or unscrewing purposes.
When the filter is in operation the liquid or water to be filtered flows into the
casing A and percolates the disc C owing to the pressure upon the liquid, the filtered
water being discharged through the branch B². To remove any slime or sediment
from the face of the filtering disc C without removing it, the brushes or scrapers E°
are rotated by the hand wheel E³ and then by opening the non-filtered water
discharge branch A² the surface will be flushed or cleaned by the liquid passing
over it.
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 :-
E
1. In a filter the combination of a brush or scraper such as E° arranged on the
spindle E, with the casing A provided with the stuffing box and gland A3 and with 5
the filtering disc C substantially sa doannihed

page_text: 2. The manufacture and use of the improved filters hereinbefore described and
illustrated in the accompanying drawings.
Dated this 31st day of May 1899.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.