Year: 1897

page_text: Date of Application, 8th Feb., 1897-Accepted, 27th Mar., 1897
I, HUGO ROST, of 105 Salzdablumerstrasse, Braunschweig, Germany, Master
Brewer, 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 an improved mash tun which is so constructed that a
much better and more profitable production of wort can be obtained than with the
mash tuns at present in use.
And in order that my invention may be properly understood I have hereunto
appended an explanatory drawing which shows the improved mash tun in section.
Referring to the drawing :—
A indicates the tun proper through the bottom of which is introduced the usual
driving shaft a. The upper end of the shaft a works in a bearing e fitted in a cross
piece b. The cross piece 6 is suspended by means of brackets d from two rollers d
(one roller only is shown on the drawing) which run upon a circular track e which
extends right round the mash tun so that the cross piece is able to revolve. From
one arm of the cross piece b is suspended, by means of the two rods f, a conical
cylinder B whose object is to receive the wort first. The cylinder B is mounted by
means of suitable bearings upon a shaft g carried by the two rods 7. One end h of
the cylinder is capable of being removed for cleaning purposes whilst the other
end i is secured in place in the inner periphery of the cylinder. This end i is rigidly
connected with a cylindrical sieve C by means of a short pipe connection k. The
cylinder B consists essentially of a fine sieve which forms its outer surface and of
an inner framing which allows of this sieve being secured in position.
On the shaft g is secured a bevel wheel which gears with a pinion m on the
shaft a and serves to impart a rotation to the cylinder B.
From the right hand side of the cross
rod, the shaft o carrying the beaters D.
the bevel wheels p, q, from the shaft a.
piece b is suspended, by means of the
The shaft o is revolved by means of
The rods and fare screwed as shown and can be raised and lowered so as to
elevate or depress the shafts o and g. The pinions g and m slide on a feather
indicated in dotted lines on the shaft a.
The circumferential edge of the end i is loosely fitted in place in the cylinder B
so that the latter can revolve without turning the end i.
The tun is filled with mash pulp as usual. When the shaft a is rotated the
cylinder B is driven through the mash and rans over its more solid portions, which
accumulate at the bottom of the tuo, with an amount of pressure sufficient to force
the wort through the meshes of the fine sieve to the interior of the cylinder. From
the cylinder the wort runs out through the pipe into the tightly closed sieve C
and from thence through the piper on to the floor.
During the revolutions of the cylinder B the beaters D stir up and loosen the
mash.
The cylinders and the beaters can be adjusted to any suitable height in the tun
by rotating the shafts j, j which act on the nuts fitted on the rods f,f¹.
The particular advantages of this invention are, first, that it can be applied with
but alight alteration to existing mash tuns; and, second, that on account of the
increased filtering surface as compared with existing arrangements the wort can be
much more quickly run off and the residuum better expressed thau heretofore.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
-consider novel and desire to claim is :-
1. A mash tun having a cylinder B rotating inside of it the outer surface of the
cylinder consisting of a fine sieve which allows the wort to pass through but retains
the residuum, substantially as hereinbefore set forth.
2. In a mash tun, a cylinder B having a fixed end i connected by a pipe with a
rotating sieve C, substantially as hereinbefore set forth.
3. In a mash tun having a cylinder B as set forth in Claim 1, the arrangement
of a cross bar which is carried by rollers and revolves with the cylinder B said bar
having the cylinder suspended from one arm and the beaters from the other arm
substantially as hereinbefore set forth.
Dand thin 4th don of
Whe 1907
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.