Improvements in Mashing Apparatus.
Year: 1899

page_text: Date of Application, 9th Mar., 1899-Accepted, 15th Apr., 1899
COMPLETE SPECIFICATION.
Improvements in Mashing Apparatus.
I, OTTO SELG, of No. 71, Linden Street, Brooklyn, County of Kings and State
of New York, United States of America, Brew-master, 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 relates to a mashing apparatus used in brewing beer and similar
beverages, which is so constructed that the entire contents of the tub are
thoroughly acted upon by the liquids, steam and compressed air introduced, and
that more particularly the formation of a dead layer upon the bottom of the
tub is avoided.
In the accompanying drawing:
Fig. 1 is a vertical longitudinal section of my improved mashing apparatus,
and
Fig. 2 is a horizontal section on line 2, 2, Fig. 1.
The letter A, represents the mash tub provided with a concave bottom a, and
a corresponding perforated false bottom a¹, adapted to concentrate the grain into
a closely packed body. The steam, thin mash, air and water are adapted to be
fed into the tub by two different pipes or pipe systems, the one entering through
the bottom a, and the other arranged within the body of the tub directly above
the false bottom a¹. Thus in the drawing the main conduit pipe b, connects at
the top with the steam pipe c, thin mash pipe d, water pipe e, and compressed air
pipe f, while at the bottom it divides into two branches g, and h.
The branch g, controlled by cock g¹, is a circular pipe placed against the inner
wall of tub A, directly above the false bottom a¹. It has a number of down-
wardly opening perforations g, through which the contents of the pipe are blown,
from above, into the lower stratum of the mash supported upon the false bottom,
so as to thoroughly penetrate the same.
The branch h, controlled by cock ', enters the central opening a², of the
bottom, above the discharge gate a³, and blows the contents of the pipe into
the mash from below. Thus by means of the combined action of the branches g, h,
the malt is thoroughly acted upon by the steam, compressed air and liquids
introduced and the settlement upon the false bottom of a body of malt which is
not thoroughly worked up and saturated, is avoided.
The stirrer is composed of a number of obliquely set blades i, i, secured to
opposite ends of a series of diametrical arms, mounted upon the power shaft z³.
The blades i, connect adjoining pairs of arms 2, at one end, while the blades 22,
connect the intermediate pair at the opposite end, so that in this way, an opening
is formed at the ends of the arms between each adjoining set of blades. This
peculiar construction of the stirrer enables it to freely enter the mash and
agitate the same in a very perfect manner.
The arms increase in length from the periphery towards the center of
the tub A, and the blades i, 21, are curved to conform to the curvature of the
false bottom a', so that they may sweep freely over such bottom.

page_text: As the tube g, is located above the false bottom, it is clear that the malt
supported upon the latter is thoroughly agitated and washed out, so that all
the extract is effectively withdrawn.
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. In a mashing apparatus, the combination of a mash tub with an enclosed
perforated tube, and means for feeding liquids, steam or compressed air to said
tube, substantially as specified.
2. In a mashing apparatus, the combination of a mash tub with an enclosed
perforated tube, an outer tube opening into the tub-bottom, and means for
feeding liquids, steam or compressed air into both of said tubes, substantially
as specified.
3. In a mashing apparatus, the combination of a mash tub having a curved
bottom and a perforated curved false bottom, with a circular inner perforated
tube above the false bottom, an outer tube opening into the tub-bottom, and means
for feeding liquids, steam or compressed air into said tubes, substantially as
specified.
4. In a mashing apparatus, the combination of a mash tub with a stirrer
composed of a shaft, a number of arms secured thereto, and stirring blades
secured to alternate pairs of said arms at opposite ends thereof, substantially as
specified.
5. In a mashing apparatus, the combination of a mash tub having a curved
bottom and a perforated curved false bottom, with an inner circular perforated
tube above the false bottom, an outer tube opening into the tub-bottom, means
for feeding liquids, steam or compressed air into said tubes, a series of stirring
blades, and arms connecting alternate pairs of said blades, substantially as
specified.
6. A mashing apparatus, substantially as herein shown and described.
Dated this 9th day of Mar 1800.
ALLISON BROS.,
Agents for the Applicant.