Improvements in Filters.
Year: 1892

page_text: Date of Application, 14th Oct., 1892
Complete Specification Left, 6th July, 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Filters.
We FRANCIS SORELL ARNOLD of 2 Arcade Chambers Manchester in the
County of Lancaster, Physician, and LIONEL CRESSWELL of Fagley House,
Eccleshill in the County of York, Barrister at Law do hereby declare the nature
of this invention to be as follows:-
This invention relates to the construction of domestic filters of that class wherein
the filtering medium is enclosed in a jar of earthenware which is provided with a
removable cover at the top and a tap near the bottom for drawing off the filtered
water, the objects of the invention being to improve the efficiency of the filtering
medium and also to afford facility for removing the same from the jar for cleansing
and other purposes.
According to our invention we make the jar preferably cylindrical with a closed
bottom and open at the top, the interior thereof being practically open from top to
bottom with an internal rim or projections at a convenient distance from the bottom
to carry a perforated tray of aluminium or earthenware upon which is placed a mat
of asbestos cloth supporting a suitable depth of carbon forming altogether the lower
filtering bed.
In the open mouth of the jar we place a pan or receptacle of earthenware formed
slightly conical towards the bottom and fitted with an external rim at the top
which can rest on the mouth of the jar. The cover fits onto the top of the
pan. The bottom of the latter is perforated with holes excepting round the edge
and is fitted with an asbestos mat supporting a carbon filtering bed of suitable
thickness.
The water to be filtered is poured into the pan above the top filtering bed, and
flows out through the central portion only onto the second filtering bed below
and thus becomes doubly filtered before it reaches the reserve compartment to be
drawn off.
It will also be evident that both of the filtering beds can be easily removed
from and replaced in the outer jar for cleansing or other purposes when required.
Dated this 13th day of October 1892.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Filters.
We FRANCIS SORRELL ARNOLD formerly of 2 Arcade Chambers and now of
No. 332 Oxford Road Manchester in the County of Lancaster, Physician, and
LIONEL CRESSWELL of Fagley House Eccleshill in the County of York, Barrister
at Law, 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 :-
This invention relates to the construction of domestic filters of that class wherein
the filtering medium is enclosed in a jar of earthenware glass or other suitable
material which is provided with a removable cover at the top and a tap near the
bottom for drawing off the filtered water, the objects of the invention being to
ensure thorough and efficient filtration while affording easy access to every part of
the filter for cleansing or other purposes.

page_text: The nature of our said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference to
the drawing hereunto annexed and the following explanation thereof.
The drawing represents a vertical section of an improved filter made according to
our inventiou.
The jar a is made preferably cylindrical with a closed bottom band open at the
top, the interior thereof being practically open from top to bottom, with an internal
rim or projection c at a convenient distance from the bottom to carry a perforated
tray d of aluminium or earthenware, glass or other suitable material, upon which is
placed a mat e of asbestos cloth, supporting a suitable depth of carbon f forming
altogether the lower filtering bed.
In the open mouth of the jar a we place a pan or receptacle g of earthenware
formed slightly conical towards the bottom and filled with an external rim g¹
which can rest on the mouth of the jar a. The cover fits onto the top of the
pan g.
The bottom of the latter is perforated with holes (excepting round the edge) and
it is fitted with an asbestos mat b* supporting a carbon filtering bed k of suitable
thickness.
The water to be filtered is poured into the pan above the top filtering bed k
and flows out, through the central perforated portion only, onto the second filtering
bed below, and it thus becomes doubly filtered before it reaches the reserve com-
partment a' from which it is drawn off.
It will be evident that both of the filtering beds can be easily removed from, and
replaced in the outer jar a for cleansing or other purposes when required.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
In domestic filters the combination with an external jar (preferably cylindrical)
of two easily removable filtering beds substantially in the manner and for the
purpose hereinbefore particularly set forth and described and illustrated by the
drawing annexed.
Dated this 5th day of July 1893.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.