IMPROVEMENTS IN THE PROCESS OF BREWING AND APPARATUS THEREFOR, SUCH IMPROVEMENTS BEING APPLICABLE FOR OTHER PURPOSES
Year: 1881

page_text: LETTERS PATENT to Walter William Davenport, of Birmingham, in the
County of Warwick, Maltster, for an Invention of "IMPROVEMENTS IN THE
PROCESS OF BREWING AND APPARATUS THEREFOR, SUCH IMPROVEMENTS
PROVISIONAL SPECIFICATION left by the said Walter William Davenport
at the Office of the Commissioners of Patents on the 12th February 1881.
WALTER WILLIAM DAVENPORT, of Birmingham, in the County of Warwick,
Malster. "IMPROVEMENTS IN THE PROCESS OF BREWING AND APPARATUS
THEREFOR, SUCH IMPROVEMENTS BEING APPLICABLE FOR OTHER PURPOSES."
This Invention relates to obtaining an automatic circulation of the wort or liquor
in the mash tun in the process of brewing, whereby I am enabled to produce a
greater amount of and a more concentrated and purer extract from the malt or
cereals, or combination of malt and cereals, or of other materials treated.
A suitable method and apparatus for carrying out my Invention is as follows:-
I provide the mash tun with a perforated false bottom made of any suitable
material and forming a kind of sieve or strainer; into the space between the bottom
and false bottom of the mash tun open a suitable number of pipes connected with
a central vertical pipe, the said vertical pipe passing nearly to the top of the mash
tun, where it is provided with telescopic perforated tubes. The said pipes may be
placed in a suitable receiver or cistern for containing water heated by any suitable
means, in which (or in a separate cistern) may be placed a ball cock provided with
a graduated rod, by adjusting which the quantity of water, and consequently the
heat, is regulated. Instead of the hot water cistern heat may be applied direct to
the circulating pipes.
The malt being mashed in the usual way the water in the herein before described
cistern is heated, and from the peculiar construction of apparatus the wort or liquor
will be caused to automatically circulate from the mash tun through the said system
of pipes and back to the tun so long as the heat is maintained, and which heat
may be regulated to any degree required for the purpose.
Instead of employing hot water for effecting the automatic circulation I may
employ steam passing through a coil or otherwise, and in this case only the central
circulating pipe is required, the lower end of which is provided with an inclined
flange or disc projecting into the space between the bottoms of the mash tun.
My improvements are also applicable to extracting saccharine matter from grain
ór malted grain for other than brewing purposes, as will be well understood.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Walter William Davenport in the Great Seal Patent Office on the
11th August 1SS1.
WALTER WILLIAM DAVENPORT, of Birmingham, in the County of Warwick,
Malster. "IMPROVEMENTS IN THE PROCESS OF BREWING AND APPARATUS
THEREFOR, SUCH IMPROVEMENTS BEING APPLICABLE FOR OTHER PURPOSES."
This Invention relates to obtaining an automatic circulation of the wort or liquor
in the mash tun in the process of brewing, whereby I am enabled to produce a
greater amount of and a more concentrated and purer extract from the malt or
cereals, or combination of malt and cereals, or of other materials treated.
A suitable method and apparatus for carrying out my Invention is as follows:-
I provide the mash tun with a perforated false bottom made of any suitable
material, and forming a kind of sieve or strainer; into the space between the
bottom and false bottom of the mash tun open a suitable number of pipes connected
with a central vertical pipe, the said vertical pipe passing nearly to the top of the
mash tun, where it is provided with a telescopic tube perforated at the upper end.
The said pipes may be placed in a suitable receiver or cistern for containing water
heated by any suitable means, in which (or in a separate cistern) may be placed a
ball cock provided with a graduated rod, by adjusting which the quantity of water,
and consequently the heat, in the inash tun is regulated. Instead of the hot water
cistern heat may be applied direct to the circulating pipes.
The malt being mashed in the usual way the water in the hereinbefore described
cistern is heated, and from the peculiar construction of apparatus, the wort or
liquor will be caused to automatically circulate from the mash tun through the
said system of pipes, and back to the tun so long as the heat is maintained, and the
heat in the mash tun may by means of the hereinbefore described automatic
circulation be regulated to any degree required for the purpose.
Instead of employing hot water for effecting the automatic circulation I may
employ steam passing through a coil or otherwise, and in this case only the central
circulating pipe is required, the lower end of which may be provided with an
inclined flange or disc projecting into the space between the bottoms of the mash
tun, but as this flange gives no useful results I do not recommend its use.
My improvements are also applicable to extracting saccharine matter from grain
or malted grain for other than brewing purposes, as will be well understood.
But to make my Invention better understood I will proceed to describe the
same by reference to the accompanying Drawing, in which Figure 1 is a sectional
elevation of a suitable construction of apparatus for carrying out my Invention
where the required heat is obtained from water; Figure 2, end view of same,
partly in section, and Figure 3 sectional elevation of the apparatus I prefer
employing where the heat is obtained from steam. Similar letters in all the
Figures represent similar or corresponding parts.
In the apparatus shewn in Figures 1 and 2 a, a, represent an ordinary mash
tun; bis the perforated false bottom with which I provide the saine; c, c, are two
pipes (but this number may be increased) opening into the space & between the
bottom e of the mash tun and the perforated false bottom b. The said pipes c
communicate by means of the inclined connecting pipes f, f, with the central
vertical pipe g, which extends nearly to the top of the mash tun a, the upper part
moving telescope-wise within the lower part, as shewn, so as to regulate the height
of the said central tube, according to the quantity of "goods" being treated. The
upper part of the vertical pipe g is perforated, as shewn at g¹.
h is the receiver or cistern, in which are placed the pipes f, f, and part of the
pipe g, the said receiver or cistern h containing water heated by any suitable
furnace i, or by other suitable means; j is a separate cistern communicating with
the cistern h, and provided with a graduated rod and ball cock for regulating
the quantity of water in the cistern h, and consequently the degree of heat in the
mash tun a.

page_text: It will be understood that instead of the system of pipes being heated by hot
water heat may be applied direct to the pipes.
By this arrangement it will be seen that the malt or other "goods" being mashed
in the tun a in the usual manner, and the water in the cistern h being heated, the
wort or liquor will be caused to automatically circulate through the "goods," and
will pass through the system of pipes and through the vertical pipe g, and through
the perforated top thereof back into the mash tun, and so on, and such circulation
will continue so long as the heat is maintained, and such heat may be regulated,
as hereinbefore described, to any required degree.
The wort or liquor is drawn off from the mash tun a in the usual manner, and
any liquor or wort remaining in the system of pipes is drawn off through the
cocks m, m.
In the apparatus shewn in Figure 3 I dispense with the water cistern and the
series of pipes, and place a steam coil n in the lower part of the vertical pipe g.
Steam being passed through the coil n will produce a similar automatic circulation
of the wort or liquor to that hereinbefore described, the wort or liquor passing
through the perforated false bottom b, up through the vertical pipe g, and through
the perforations g¹ back into the mash tun, and so on.
For regulating the heat where steam is employed I use any suitable apparatus
connected with the coil, such, for example, as an apparatus consisting of a tube
filled with water or other liquid, and provided with a plunger connected with a
steam valve in such a manner that the heat from the wort by expanding or
contracting the liquid in the tube will close or open the said steam valve.
For raising or lowering the top part of the vertical tube g I employ any suitable
arrangement, such as that shewn in Figure 3, which consists of a vertical rod o,
the lower end of which is screw threaded and works in a fixed nut p; the said rod is
formed with a neck or groove at q, in which fits the cross piece fixed to the upper
part of the vertical tube g; the upper end of the rod o is provided with a crank s,
which is actuated by the lever handle t, whereby the upper part of the vertical
tube y can be raised or lowered.
Having thus described the nature of my said Invention, and the best means
with which I am acquainted for carrying the same into effect, I wish it to be
understood that I do not confine myself to the precise construction of apparatus
hereinbefore described and illustrated in the accompanying Drawing, as the same
may be varied without departing from the peculiar character of my Invention,
but what I do claim is,-
Firstly. The improvements herein described in brewing, such improvements
consisting in obtaining an automatic circulation of the wort or liquor in the mash
tun by means of suitable apparatus, as and for the purposes herein before described.
Secondly. The construction and application to an ordinary mash tun of the
apparatus herein described, for the purpose of giving to the wort or liquor in the
mash tun an automatic circulation by incans of heated water, substantially as and
for the purposes hereinbefore described and illustrated in Figures 1 and 2 of the
accompanying Drawing.
Thirdly. The modified construction of apparatus to allow of steam being employed
for effecting the automatic circulation of the wort or liquor in the mash tun,
substantially as hereinbefore described, and illustrated in Figure 3 of the
accompanying Drawing.
In witness whereof, I, the said Walter William Davenport, have hereto set
my hand and seal, this Tenth day of August, in the year of our Lord
One thousand eight hundred and eighty one.
WALTER WILLIAM DAVENPORT. (L.S.)