Improvement in Filters for the Purification of Water and other Liquids.
Year: 1890

page_text: Date of Application, 16th Jan., 1890
Complete Specification Left, 15th Oct., 1890-Accepted. 15th Nov.. 1890
PROVISIONAL SPECIFICATION.
Improvement in Filters for the Purification of Water and other
Liquids.
ALFRED SMITH 6 Alderton Road Camberwell London S.E. Engineer do hereby
declare the nature of this invention to be as follows:-
This invention has for its object the improved arrangement and construction of
filters to work under pressure for purifying water and other liquids in such a
manner that the apparatus may be more readily taken apart and the filtering medium
removed for the purposes of cleansing or renewal than is the case with any other
known method.
The apparatus consists of a case, preferably of cylindrical form, with one end
closed and one end with a loose cover, or with a loose cover at each end, the whole
made of metal or other suitable material, the loose covers being fitted with suitable
washers to prevent leakage. In each end piece or cover there is a hole in the centre
through which a pipe with a thread at each end passes, such pipe being longer than
the case and forming both inlet and outlet. This pipe is perforated with one or more
holes near the inlet end and plugged immediately below in such a manner that the
unfiltered liquid must pass out of the pipe to the interior of the body of the filter,
such holes forming the inlet to the filter. Other holes are made along the remaining
length of the pipe, forming the outlet for the filtered liquid. The pipe is fitted with
filtering blocks or surrounded with any suitable filtering material.
The loose ends or covers are secured and the filter made tight by means of a
suitable backnut at each end of the pipe outside the ends of the case, such nuts being
for preference "fly-nuts" or nuts made with thumb pieces so that they can be screwed
up and unscrewed by hand.
COMPLETE SPECIFICATION.
Improvement in Filters for the Purification of Water and other
Liquids.
1, ALFRED SMITH 6 Alderton Road, Camberwell London S.E. Engineer 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 has for its object the improved arrangement and construction of
filters to work under pressure for purifying water and other liquids in such a
manner that the apparatus inay be more readily taken apart and the filtering
medium removed for the purposes of cleansing or renewal than is the case with any
other known method.
The apparatus consists of a case, preferably of cylindrical form, with one end
closed and one end with a loose cover, or with a loose cover at each end, the
whole made of metal or other suitable material, the loose covers being fitted with
suitable washers to prevent leakage.
In each end piece or cover there is a bole in the centre, through which a pipe with
a thread at each end passes, such pipe being longer than the case, & forming both
inlet and outlet. This pipe is perforated with one or more holes near the inlet end
and is plugged immediately below in such a manner that the unfiltered liquid must
pass out of the pipe to the interior of the body of the filter, such holes forming the
inlet to the filter. Other holes are formed along the remaining length of the pipe,

page_text: forming the outlet for the filtered liquid. The pipe is fitted with filtering blocks or
surrounded with any suitable filtering material.
The loose ends or covers are secured & the filter made tiglit by means of a suitable
backnut at each end of the pipe, outside the ends of the case, such backnuts being for
preference "flynuts or nuts made with thumb pieces so that they can be screwed
up and unscrewed by hand, or instead of backnuts, unions with thumb pieces may be
used.
وو
And in order that my invention may be clearly understood and readily carried into
practice I will proceed to describe the drawing hereunto annexed.
a. a is the outer case. b. b are the loose ends or covers. c is the pipe or. centre
tube. d is the plug. e. e is the filtering material. The arrows shew the direction
of water flow from inlet to outlet.
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 1
claim is :-
The improved arrangement and construction of filter herein described, in which
the pipe or centre tube forms both inlet and outlet, and by means of which the loose
ends or covers are secured water tight to the outer case substantially as described and
shewn in drawing.
Dated this 11th do
1000