Improvements in Water Filters.
Year: 1899

page_text: Date of Application, 20th May, 1899-Accepted, 24th June, 1899
[Communicated from abroad by CARL JOST, of 13, Hornby Row, Bombay, India,
Engineer, and ALFRED PELL, of 7, Elphinstone Circle, Bombay, India.]
Improvements in Water Filters.
I, EDWARD TURNER WHITELOW, of 70, Deansgate, Manchester, Patent Agent,
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:-
The object of this invention is a portable water filter suitable for travellers
and household use having a porous cell through which the water is forced into a
drinking cup or the like ready for use.
In order that my said invention may be more clearly understood I will describe
the same with reference to the accompanying drawing which is a sectional eleva-
tion of a water filter constructed in accordance with my said invention.
In the drawing a is a porous cell closed at its lower end and having at its
upper part a ring b screwed so as to engage with the head c of the filter. dis
a leather or rubber washer to prevent leakage at the screw joint c and also to
pack the plunger e. The plungere may be constructed of vulcanite wood or any
suitable material. A nozzle f is provided for a rubber tube m and has a
passage and suction valve communicating with the interior of the porous
cell a
A drinking cup or the like jis attached to the head c of the filter by a
Screw bayonet joint or other convenient attachment.
The cup is provided with one or more small openings to permit air to
escape as the filtered water is running into the drinking cup j, and. to indicate
when the cup is full.
I
The cup not only serves as a drinking cup but acts as a protector or guard
to the porous cell a.
When it is desired to convey the water from the cup j to a second receiver a
small nozzle may be inserted in a side opening with a rubber tube attached
thereto and communicating with the second receiver so that the filtered water
from the drinking cup may empty itself therein. The plunger e working in the
head of the filter is of such dimensions as not to come into contact with the
porous cell.
To use the filter the end of the rubber tubing m is placed in the water to be
filtered the plunger e is raised drawing the water up through the passage to the
interior of the porous cell a. The plunger on being pressed down into the cell
forces the water through the porous cell a into the drinking cup j
In lieu of a solid plunger as described a pump may be applied to the filter
as for instance a bicycle pump. In this case the head of the filter c has no opening
for a plunger but is constructed with a screw / suitable for the thread of a bicycle
pump. The screw ? has an internal extension or nozzle n to which an expansible
rubber air tube or bag o (shown in a deflated state in dotted lines) is fixed having
its lower end closed so as not to allow any air which has been pumped in through

page_text: the orifice n to escape. On inflation the expansion of the rubber tube o forces
the unfiltered water contained in the porous cell a into the drinking cup j. The
contraction of the rubber tube o draws the water to be filtered up the rubber
tube m through the passage g and valve h to the interior of the cell a
In order to replace or repair the valve h when required I provide the head c
of the filter with a screwed cap r as shown.
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: -
1. A water filter provided with means for sucking in the water to be filtered
and pressing it through a porous cell substantially as set forth and shown.
2. In a water filter the combination of a water inlet f a plunger or ram e a
porous cell a and an outer water receptacle or cup substantially as set forth and
shown.
3. In a water filter the combination of a water inlet f an inflatable and deflat-
able air bag o (acting as a pump) a porous cell a and an outer water receptacle or
cup substantially as set forth and shown.