Year: 1888

page_text: Date of Application, 10th Mar., 1888
Complete Specification Left, 4th. Dec., 1888
Complete Specification Accepted, 15th Jan., 1889
I, BASIL WILLIAM VALENTIN of Aston Brewery, Birmingham, Brewer do hereby
declare the nature of this invention to be as follows:-
When wort is drawn off from the mash tun it generally holds in solution certain
nitrogenous substances, which, unless they are removed, tend to make the beer turbid,
and to cause deposit in bottles or other vessels in which the beer is stored. My in-
vention relates to a simple means of getting rid of the most objectionable of these
substances. I proceed in the following manner :-When the wort leaves the mash
tun usually at a temperature of 140° to 150° F. it contains the nitrogenous substances
in a dissolved or diffused condition. I draw the whole of this wort off, and heat it up
to about 180° F., and by this means, besides ensuring a high proportion of dextrine,
effect a change in the nitrogenous matter, such that when the wort is again cooled to
150° F. or lower, this matter becomes separable from the wort. After having heated
the wort to about 180° F. as above stated I cool it down again to 150° F. or lower,
and pass it through the grains from which it was obtained. These act as a filter
allowing the pure wort to pass through, but retaining the most objectionable of the
nitrogenous substances.
Dated this 10th day of March 1888.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improvement in Brewing.
I, BASIL WILLIAM VALENTIN of Aston Brewery, Birmingham, Brewer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement
When wort is drawn off from the mash tun, it generally holds in solution certain
nitrogenous substances, which, unless they are removed, tend to make the beer
tur bid and to cause deposit in bottles or other vessels in which the beer is stored.
My invention relates to a simple means of getting rid of the most objectionable of
these substances. I proceed in the following manner When the wort leaves the
mash tun, usually at a temperature of 140° to 150° F., it contains the nitrogenous
substances in a dissolved or diffused condition. I draw the whole of this wort off and
heat it up to about 180° F., and by this means, besides ensuring a high proportion of
dextrine, effect a change in the nitrogenous matter, such that when the wort is again
cooled to 150° F., or lower, this matter becomes separable from the wort. After
having heated the wort to about 180° F., as above stated, I cool it down again to
150° F. or lower, and pass it through the grains from which it was obtained. These
act as a filter allowing the pure wort to pass through, but retaining the most objection-
able of the nitrogenous substances.
The treatment above described may be applied to the whole contents of the mash
tun in bulk, but it is of advantage to treat successive portions of the contents, carrying
on the process in a continuous manner by circulation of the wort from the mash tun,
first through a vessel, coil or set of pipes, by which it is rapidly heated to about
180° F., then through another similar appliance by which it is rapidly cooled to
150° F. or lower, and finally to the sparger to be filtered through the grains. This
circulation is continued until the wort is so far cleared of the nitrogenous substances
that no farther coagulation takes place when it is heated to 180° F.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
-The process for clearing wort from certain impurities by heating, cooling and filtering,
substantially as herein described.
Dotadd this 4th dor of Ur 1000
i
.