Improvements in Filters.
Year: 1892

page_text: Date of Application, 21st July, 1892.
Complete Specification Left, 7th Apr., 1893-Accepted, 13th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Filters.
I, SAMUEL ALBERT JOHNSON, of 225 High Street, Poplar, in the County of
Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
-
My invention relates to that class of filters which are attached to a water pipe
and from which filtered or unfiltered water may be drawn as desired.
The object of the invention is to construct a simple, cheap and durable filter
which shall be capable of withstanding high pressure.
In carrying my invention into effect I form the body of the filter of a cylindrical
or other suitably shaped barrel, and at each end of this barrel 1 place corre-
spondingly shaped caps or covers provided with washers of suitable material,
preferably cork, to fit against the ends of the barrel. These caps or covers are
perforated in their centres to allow a pipe to be passed through the entire length of
the filter. The pipe is screw threaded at each end and provided with nuts and
washers to enable the caps or covers to be held forcibly in position against the ends
of the barrel or body and thus to form a watertight compartment. About the
centre of its length the pipe passing through the filter is plugged, so as to prevent
the unfiltered water, which passes in at one end of the pipe, from passing directly
out at the tap provided at the other end of the pipe. The pipe is perforated on
each side of the central plug, and one part of the pipe is provided with the usual
carbon block.
The water to be filtered passes, as usual, from the supply pipe to the space
around the outside of the carbon block and then through the substance of the
carbon into that part of the central pipe communicating directly with the draw off
tap for the filtered water; unfiltered water can be drawn off from another tap
communicating directly with the space around the filtering block, which at the
same time cleanses the block.
I also according to my invention attach to the outlet end of the filter a two way
cock; the way for the filtered water communicates directly with the central tube,
and the way for the unfiltered water communicates directly with the space around
the carbon block. The two way cock has only one outlet, through which either
filtered or unfiltered water can be drawn off as desired.
Thus, by turning the plug of the tap or cock into one position, filtered water can
be drawn off from the filter; when turned into another position, unfiltered water
can be drawn off therefrom, and when turned into a third position, the tap or cock
is shut off.
The filter is provided with suitable connections for connecting it with the service
pipe.
The two way cock above described can be applied to either high or low pressure
filters.
Dated this 21st day of July 1892.

page_text: COMPLETE SPECIFICATION.
Improvements in Filters.
I, SAMUEL ALBERT JOHNSON, of 225 High Street, Poplar, in the County
of Middlesex, Marine 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:―
My invention relates to that class of filters which are attached to a water pipe
and from which filtered or unfiltered water may be drawn as desired.
The object of the invention is to construct a simple, cheap and durable filter
which shall be capable of withstanding high pressure.
In carrying my invention into effect I form the body of the filter of a cylindrical
or other suitably shaped barrel, and at each end of this barrel I place corre-
spondingly shaped caps or covers provided with washers of suitable material,
preferably cork, to fit against the ends of the barrel. These caps or covers are
perforated in their centres to allow a pipe to be passed through the entire length
of the filter. The pipe is screw threaded at each end and provided with nuts and
washers to enable the caps or covers to be held forcibly in position against the ends
of the barrel or body and thus to form a watertight compartment. About the
centre of its length the pipe passing through the filter is plugged so as to prevent
the unfiltered water, which passes in at one end of the pipe, from passing directly
out at the tap provided at the other end of the pipe. The pipe is perforated on
each side of the central plug and one part of the pipe is provided with the usual
carbon block.
The water to be filtered passes, as usual, from the supply pipe to the space
around the outside of the carbon block and then through the substance of the
carbon into that part of the central pipe communicating directly with the draw off
tap for the filtered water; unfiltered water can be drawn off from another tap
communicating directly with the space around the filtering block, which water at
the same time cleanses the block.
I also according to my invention attach to the outlet end of the filter a two-
way cock; the way for the filtered water communicates directly with the central
tube and the way for the unfiltered water communicates directly with the space
around the carbon block.
The two-way cock has only one outlet, through which either filtered or unfiltered
water can be drawn off' as desired.
And in order that my said invention may be more clearly understood and readily
carried into effect I will proceed, aided by the accompanying drawings, more fully
to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section of a filter constructed according to my invention
for withstanding high pressure. Figures 2, 3 and 4 are sections of a two-way cock
to be used therewith and showing the plug in three different positions, and Figure 5
is a vertical section of a low pressure filter provided with a two-way cock.
In carrying my invention into effect 1 form the body of the filter of a cylindrical
or other suitably shaped barrel a, and at each end of this barrel I place corre-
spondingly shaped caps or covers a¹ a, which are provided with washers bb,
preferably of cork, to fit against the ends of the barrel a.
These caps or covers a¹ a² are centrally perforated to allow a pipe c to be passed
through the entire length of the filter.
C
The pipe is screw threaded at each end and is provided with nuts and
washers cc to enable the caps or covers a¹ a³ to be held forcibly against the ends
of the barrel or body a and thus to form a water tight compartment.
The pipe c is plugged at c², so as to prevent the unfiltered water, which passes in

page_text: at the upper end of such pipe, from passing directly through such pipe to the outlet
tap d fixed at the lower end thereof.
The pipe c is perforated at c³ and c', one of such perforations being on each side
of the plug c, and the lower part of the pipe c, within the filtering chamber, is
provided with the usual filtering block e, which is held firmly in position between
two hermetically tight washers e'.
The water to be filtered passes from the upper part of the pipe through the
perforation to the space between the filtering block e and the cylinder a, then
through the substance of the block e and through the perforation into that part
of the pipe c communicating directly with the draw off tap d for the filtered water;
unfiltered water can be drawn off from another tap 9, shown by dotted lines,
communicating directly with the space f, which water at the same time cleanses the
block e.
I also according to my invention employ a two way tap d communicating with
the outlet end of the pipe c and with the space f, in lieu of two separate
taps d and g communicating separately with such parts.
The two way tap has only one outlet d', through which either filtered or unfiltered
water can be drawn off as desired.
The lower end of the tube c is connected directly with the upper end of the body
of the two way tap d, and the space is connected by the pipe d2 with the side of
the body of such tap. The pipe d² is divided and provided with a union joint (* as
shown, one part being connected to the barrel a, and the other forming part of the
two way tap d. The plug has a transverse hole d passing entirely through it,
and a second hole in one side communicating with the hole №ª.
Thus, when the plug ³ is turned to the position shown at Figure 2, the passage
through the outlet d' is closed, when turned to the position shown at Figure 3,
unfiltered water can be drawn off, and when in the position shown at Figure 4,
filtered water can only be drawn off.
In the application of the two way tap to a low pressure filter, as shown at
Figure 5, I dispense with the divided tube before described, and I make an
opening in the side of the body of the two way tap and solder thereto one end of a
tube, the other end of which is soldered to the bottom of the filtering chamber,
through which latter a hole is formed to establish a communication between the
tube and the space faround the block e. The filter can be connected to the supply
pipe by means of the screw at the upper end of the pipe c and suitable fittings.
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 I
claim is:
1. A filter comprising a barrel or body, a centrally perforated cap or cover at
each end provided with washers to fit against the ends of the barrel or body, a pipe,
screw threaded at each end, passed through the centre of the filter, which pipe is
plugged intermediate of its ends and is formed with a perforation above and below
the plug, a tap for filtered water communicating with the lower end of the central
tube, and a tap for unfiltered water communicating with the space between the
filtering block and the body of the filter, or a two-way tap in substitution of the
two taps above mentioned, substantially as herein shown and described.
2. A filter comprising a chamber containing a filtering block, an outlet to such
chamber, a central tube for the outlet of the filtered water, and a two-way
tap, one way of which is connected with the outlet pipe for the filtered water, and
the other way, by a pipe, with the space in the filtering chamber for the passage of
unfiltered water, substantially as herein showu and described.
D
ת
2100
Ton way of p1000
S. A. JOHNSON,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.