Improvements in Coffee Making Apparatus.
Year: 1898

page_text: Date of Application, 21st Apr., 1898
Complete Specification Left, 19th Jan., 1899-Accepted, 25th Feb., 1899
Improvements in Coffee Making Apparatus.
We, HENRY WILSON AND COMPANY LIMITED, of Cornhill Works, Cornhill,
Liverpool, in the County of Lancaster, and THOMAS MASSEY LYNCH, of Cornhill
Works aforesaid, Director, do hereby declare the nature of this invention to be
as follows;
This invention has reference to apparatus employed for "making" coffee in
comparatively large quantities, such as are suitable for use on board ship, in
hotels, and like purposes or uses; and it has for its object, amongst other things,
to provide an apparatus of the kind referred to which, while it will produce or
make coffee of the best and pleasantest flavour, shall be of simple construction,
and inexpensive, and readily accessible, and the parts quickly attended
to, changed, or repaired.
According to this invention, the apparatus comprises a lower and an upper
vessel, the lower one for containing water, and having within it a coil or quantity
of pipe, through which steam is passed under pressure for heating and boiling
the water; and other provisions hereafter described; whilst the upper chamber
is a coffee vessel, and is comprised of (or its upper surface is comprised of) delf
ware, or other equivalent ware, and is secured on to the lower vessel by external
flanges, which are bolted together; both vessels being of about the same diameter,
and having a metal horizontal diaphragm, forming a floor to the upper one, on
which the delf coffee chambor is supported, and a roof to the lower one. In this
upper chamber, there is a coffee percolater to which boiling water from the lower
vessel is supplied.
The water supplied to the percolater containing the coffee, is forced up by
steam generated from the water in the lower chamber, through a pipe, the open
end of which is near the bottom, and which passes out through the side of the
lower chamber, and then up and into the upper coffee chamber through the side
thereof, and the delf lining, where it terminates in the percolater. Couplings are
provided, preferably at the parts where this pipe passes through the sides of these
two vessels, by which the external part can readily be detached when required, as
when repairing the apparatus, and the two parts are being taken asunder at the.
jointing flanges referred to. A tap may be provided on this external pipe, say al
the lower part, for controlling the flow of water to the percolater.
The delf coffee chamber is preferably provided with a lute at the upper edge,
and above it a loose or removable metal cover is provided, which closes the upper
vessel, and has a web fitting in the lute, where it makes a lute joint.
In one construction, the shells or bodies of the two chambers are made of sheet
metal, say brass, with the fastening flanges on the bottom and upper edge of
the coffee and hot water chambers, respectively; the separating diaphragm, above
referred to, being made one with the upper flange; webs being formed on the
underside, giving it rigidity.
The lower chamber is provided with a suitable safety valve, a junction for filling
it with water and a tap below, for emptying it; and also a tap on a stand pipe.
outside, for admitting air to the chamber when emptvino.

page_text: The heating of the water in the lower.chamber and generation of steam may be
effected by a steam heated coil, the steam inlet and exhaust connection being
passed through the side of the apparatus; also, on the lower vessel, a water gauge
is provided.
The action of the apparatus is that the lower vessel being filled with water, and
the percolater which is preferably silvered--charged with coffee, the water is
heated by the steam passed through the coil; and boiled; and the steam which
accumulates above the water forces the water up through the ascension pipe to
the percolater through the coffee therein, and thence the coffee extract falls into
the delf or like coffee chamber, from which it can be drawn off by a tap at the
bottom.
We, HENRY WILSON AND COMPANY LIMITED, of Cornhill Works, Cornhill,
Liverpool, in the County of Lancaster, and THOMAS MASSEY LYNCH, of Cornhill
Works aforesaid, Director, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
A
This invention has reference to apparatus employed for "making" coffee in
comparatively large quantities, such as are suitable for use on board ship, in
hotels, and like purposes or uses; and it has for its object, amongst other things,
to provide an apparatus of the kind referred to which, while it will produce or
make coffee of the best and pleasantest flavour, shall be of simple construction,
and inexpensive, and readily accessible, and the parts quickly attended
to, changed, or repaired.
According to this invention, the apparatus comprises a lower and an upper
vessel, the lower one for containing water, and having within it a coil or quantity
of pipe, through which steam is passed under pressure for heating and boiling
the water, and other provisions hereafter described; whilst the upper chamber
is a coffee vessel, and is comprised of (or its inner surface is comprised of) delf
ware, or other equivalent ware, and is secured onto the lower vessel by external
Hanges, which are bolted together; both vessels being of about the same diameter,
and having a metal horizontal diaphragm, forming a floor to the upper one, on
which the delf coffee chamber is supported, and a roof to the lower one. In this
upper chamber, there is a coffee percolater to which boiling water from the lower
vessel is supplied.
The water supplied to the percolater containing the coffee, is forced up by
steam generated from the water in the lower chamber, through a pipe, the open
end of which is near the bottom, and which passes out through the side of the
lower chamber, and then up and into the upper coffee chamber through the side
thereof, and the delf lining, where it terminates in the percolater. Couplings are
provided, preferably at the parts where this pipe passes through the sides of these
two vessels, by which the external part can readily be detached when required, as
when repairing the apparatus, and the two parts are being taken asunder at the
jotting flanges referred to. A tap may be provided on this external pipe, say at
the lower part, for controlling the flow of water to the percolater.

page_text: The delf coffee chamber is preferably provided with a lute at the upper edge,
and above it a loose or removable metal cover is provided, which closes the upper
vessel, and has a web fitting in the lute, where it makes a lute joint.
In one construction, the shells or bodies of the two chambers are made of sheet
metal, say brass, with the fastening flanges on the bottom and upper edge of
the coffee and hot water chambers, respectively, the separating diaphragm above
referred to, being made one with the upper flange: webs being formed on the
underside, giving it rigidity.
The lower chamber is provided with a suitable safety valve, a junction for filling
it with water, and a tap below, for emptying it, and also a tap on a stand pipe
outside, for admitting air to the chamber when emptying.
The heating of the water in the lower chamber and generation of steam may be
effected by a steam heated coil, the steam inlet and exhaust connection being
passed through the side of the apparatus; also on the lower vessel, a water gauge
is provided.
The action of the apparatus is that the lower vessel being filled with water, and
the percolater which is preferably silvered-charged with coffee, the water is
heated by the steam passed through the coil; and boiled; and the steam which
accumulates above the water forces the water up through the ascension pipe to
the percolater through the coffee therein, and thence the coffee extract falls into
the delf or like coffee chamber, from which it can be drawn off by a tap at the
bottom.
The invention the nature of which is above described, is illustrated in the
accompanying drawings, in which Figure 1 is a sectional elevation, and Figure 2
an outside elevation.
In the drawings, a is the lower vessel, in which the water to be used in making
the coffee is boiled; and 6 is the heating surface, viz. a coil of pipes, having an
inlet branch b' and outlet branch 2, through which steam from any suitable source
is introduced and circulated. The shell a and bottom a² of this vessel a is of sheet
metal, say of sufficient strength to withstand the pressures required, to effect the
work to be performed; and it is covered externally with a lagging or covering c,
of bad conductor of heat, as wood, to retain the heat.
d is the horizontal diaphragm forming a roof to the vessel a, and a floor to the
upper vessel.
are webs on the underside of this diaphragm for strengthening
it; and is a flange on the outside edge of this plate. e is an angle shaped flange,
the vertical part of which is brazed or otherwise secured to the upper edge of the
cylinder a whilst the horizontal portion comes under the flange d, and the
upper and lower vessels are bolted together and fastened in position, by means of
these flanges and bolts.
is the coffee vessel, fixed on the diaphragm d (which forms the bottom of this
vessel) by the vertical portion 3 of the diaphragm; and is the delf ware or
earthenware lining fitting in the vessel h. This lining i-constituting an open top
vessel has an inner annular flange at its upper part which makes an annular
lute; and the lid k has a vertical web on its under side, which fits into this lute;
and by means of the water of condensation which will fall into the lute, the coffee
vessel is sealed or closed.
The vessel is provided with an angular flange h¹, on the upper edge of which
the outer lower part of the cover k sits.
"2
7 is the coffee infuser or box which holds the ground coffee, and which may be of
any known suitable kind; and m is a pipe within the liner or vessel i, through
which the hot water is supplied to it, this pipe being passed through to the shells
of the liner i and the vessel h, and having a
" union m on the outside.
This pipe m is connected with the vessel a by the piece of pipe n, outside the
two vessels h and a, and a pipe o within a.
The pipe
o is carried down, and has
its entrance near the bottom of the vessel a; and it passes through the side of a,
where it is provided with a junction or union o¹. To the union m¹ and to the
union o¹ the ends or terminals of the pipe m are joined. The part of the union o¹

page_text: which is connected with n, is provided on the tap p, which is on n.
controls the communication by these pipes between the chambers a and h and the
This tap
flow of water to the vessel i, is opened, closed, or regulated as required.
q is a safety valve on the upper part of the lower chamber a; r is a junction
for filling it with water; s is a tap for emptying it; t is a gauge glass with junction
taps, for shewing the level of water in it; and u a tap, and u
upper part, outside, for admitting air to the vessel when emptying. is the tap
stand pipe on the
on the upper vessels h and i, by which coffee is withdrawn from this vessel.
In action, assuming the vessel a to be filled with water to the level required,
and the box to be charged with ground coffee, steam-or other heating fluid-
from a suitable source is passed through the coil b, the result of which is, that
water is heated and steam generated in a; and when the pressure of this steam
reaches a certain point, if the tap 2 be opened, it forces the hot or boiling water
up by the pipes o, n, and m, into and through the coffee in the diffuser box 1, and
80 makes the coffee in the vessel i, from which it is withdrawn by the tap b.
The coffee so made is retained within the delf or earthenware lining or vessel i,
which is absolutely inert upon the fluid, as regards imparting flavour to it, and
hence the coffee is of a pure and unmixed flavour. The only metal which it comes
in contact with, is that of the pipe m and the diffuser box 7, which are well electro-
plated, preferably with silver.
"
29
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, we declare that what we claim
is:-
1. The herein described improvement in coffee making apparatus, viz. an
apparatus comprising a water heating vessel, and a coffee making vessel having a
lining or inner surface of delf, earthenware, or similar ware; for the purposes set
forth.
2. In a coffee making apparatus, a lower coffee making vessel a; an upper coffee
making vessel as h; a pipe or connection, as o, by which the water is discharged
from the water heating vessel; an external pipe, as n for conveying hot water to
the diffusing device; an internal pipe or connection, m; and joints or unions o¹
and m² connecting the lower and upper ends of n, with the pipes or connections o
and m; substantially as set forth.
3. In coffee making apparatus of the kind herein referred to, the lower vessel a,
and upper vessel h, with diaphragm d, and flanges e, 2; constructed and arranged
as and for the purposes set forth.
4. In a coffee making apparatus comprising a water heating chamber, and a
coffee making chamber, the delf, earthenware, or like vessel within the coffee
making vessel; substantially as and for the purposes set forth.
5. The coffee making apparatus having parts arranged, constructed, and adapted
to operate, as set forth with reference to and shewn in the drawings.
Dated this 18th day of January 1899.
CHEESBROUGH & ROYSTON,
Applicants' Patent Agents, 15, Water Street, Liverpool.