An Improved Attachment for Beer and like Filters
Year: 1898

page_text: Date of Application, 24th June, 1898
Commiata Cannifination Loft 24th Fab 1800 Accented 20th Ann
1800
An Improved Attachment for Beer and like Filters,
JOHN HAMBIDGE, 18, Swanswell Street, Coventry, Warwickshire, Whitesmith.
do hereby declare the nature of this invention to be as follows;-
My invention consists in fitting a special shaped granulated carbon chamber
having a dished or concaved bottom. So attached to the filter that the beer pass-
ing through the same is thoroughly cleansed. It is also applicable for beer and
like filters.
It
The shape of this chamber is a double cone of a suitable diametre and length
tapering from the centre. Having a thread in the centre for fixing to filter.
is made preferrably of a brass webb or similar material.
JOHN HAMBIDGE,
18, Swanswell Street, Coventry, Warwickshire.
JOHN HAMBIDGE,
18, Swanswell Street, Coventry, Warwickshire.
I, JOHN HAMBIDGE, of 18, Swanswell Street, Coventry, Warwickshire, White-
smith, 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 will be best understood by reference to the accompanying draw-
ings, wherein,
Figures I and II show vertical sections of various embodiments of my invention,
and
Figure III is an elevation of the carbon chamber separated from the other parts
and drawn to an enlarged scale.
Like reference numerals indicate like parts throughout the drawings.
Beer and like filters commonly consist of a flat bottomed upper vessel
(Figure I) resting in a lower vessel 3 which contains a felt bag 4 and is adapted
to stand on the barrel. An aperture 5 is made in the centre of the bottom 8 of
the upper vessel and this aperture is commonly surrounded by a perforated collar
and covered by a cap. There is also an aperture 6 in the centre of the bottom of
the lower vessel, and a detachable pipe leads thence into the interior of the barrel.
The foot or feet 7 of the filter are so shaped as to allow the filter to stand on the
curved surface of the barrel.
According to my invention I make the bottom 8 of the upper vessel 2 (Fig. II)

page_text: concave instead of flat, so that the liquid will run completely out of the said
upper vessel.
The bottom of the lower vessel 3 also is preferably made concave
for the same reason. I provide the aperture 5 with a screw thread and screw
thereinto a double conical carbon chamber 9 preferably constructed of fine brass
wire gauze or web, and provided at its centre with a suitable screwed collar 10.
Or the carbon chamber may be secured in position by any other well known suit-
able method of fastening. The chamber is charged with granulated carbon filtering
material. The liquid passes through this carbon chamber on the way from the
upper vessel 2 to the lower vessel 3 and is thereby cleansed.
I prefer to extend the walls of the lower chamber to the top of the filter as
shown in Fig. II and to rest the bag 4 on a ledge 11 formed by soldering a wire
around the inside of the said vessel 3 at a suitable height and to provide the upper
vessel with a lip 12 adapted to rest on the rim 13 of the vessel 3. But in
dealing with an existing filter I may merely employ a removable concave bottom 14
and place it in the upper vessel 2, as shown in full lines in Fig. 1; or I may
cut away the flat bottom 8, except as to a rim 15 on which I rest the removable
concave bottom 14 as shown in dotted lines in Fig. 1. But I prefer to replace the
flat bottom by a concave bottom as shown in Fig. II. In cases such as those shown
in Figure I, I make the depth of the concavity about equal to the depth of the
upper part of the vessel, and I make the carbon chamber as a single cone, screw-
ing it into place, as before.
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. Providing a beer or like filter with a conical or double conical carbon
chamber in the bottom of the upper vessel.
2. A carbon chamber, for a beer or like filter, constructed, arranged and adapted
to operate substantially as herein described and illustrated.
Dated thi 09-1
1000
DOUGLAS LEECHMAN,
Fellow of the Institute of Patent Agents,
18, Hertford Street, Coventry,
9, Exchange Chambers, New Street, Birmingham, and
75, Chancery Lane, London, W.C., Patent Agent for the Applicant.