New Method of Fixing Disks in Freezing Ohambers.
Year: 1895

page_text: Date of Application, 28th Feb., 1895-Accepted, 24th Aug., 1895
New Method of Fixing Disks in Freezing Ohambers.
We, THE " COMPANIA SANSINENA DE CARNES CONGELADAS " and
TRANCISCO SANSINENA, Engineer, all of Buenos Ayres, Argentine Republic, 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 Specification relates to a new method of fixing disks in freezing chambers,
that we have invented, and which is far superior in every way to any systemi
hitherto employed.
In freezing chambers cold is produced by the absorption of heat and moisture
contained therein, which reduces the temperature.
This phenomenon is produced in different ways, both natural and artificial.
One of the artificial means most generally used for giving rise to a fall of
temperature in freezing chambers is the employment of ammoniacal liquors which
pass through long tubes in the upper part of the chambers.
For the purpose of multiplying the heat-absorbing surface, these tubes are
provided throughout their entire length, with a number of iron disks formed of two
parts, and which are in contact with the tube by means of a semi-circular slot
provided in each of the parts, which, on being united, form a ring that completely
grasps the tube.
Each piece of the disks bears, on each face, two projections, which on the pieces
being joined, coincide one with the other, and are bound by a wedge, which is
hollowed out in the centre in the same manner as the projections on the parts of
the disks.
Such is the method of joining the disks that has been in use up to the present,
which system presents many disadvantages as we will proceed to point out.
The series of tubes with their disks, that are placed in the upper part of the
freezing chambers absorb, as we have already mentioned, the heat contained in
the same, causing the temperature to fall, the moisture being condensed in the
shape of snow or ice, which deposits on the surface of the tubes and disks. As ice
is a bad conductor of heat, it is necessary to remove it, from time to time, from the
disks and tubes, and this is done by striking them with an iron bar or piece of
wood.
In carrying out this operation the holding wedges are frequently knocked out,
and the disks fall to the ground in large numbers, or else they are merely loosened,
and then the slightest vibration makes them drop of their own accord, to the great
danger of the men working in the chambers. When many disks have fallen, the
heat-absorbing surface naturally diminishes, and the replacing of the same gives
rise to great inconvenience, to loss of time, and to increased labour, since it is
necessary to shut off the communication between the engines and the chambers,
open the doors of the latter to admit the outer air, so that the snow may thaw, and
then proceed to replace the fallen disks.
For the purpose of avoiding these difficulties we have provided for the sub-
stitution of the projections and the hollow holding-wedges of the old system, by
pierced lugs on both parts of the disk, which coincide on being joined, and are
firmly connected by bolts and nuts or by slotted bolts and wedges 'or their
equivalents.
In this manner we secure a more homogeneous contact between the disk and the
tube, greater security and facility for the cleansing of the same, since it is

page_text: impossible to dislodge them from the tube, whilst we avoid the serious disadvantage
of having to open the chambers and to interrupt the work, as is the case at present,
whenever a large number of disks have dropped, from any cause.
For greater clearness we have shewn in the accompanying drawings the two
systems of fixing the disks; in detail and as a whole, both as it is generally done,
and also according to the method we have devised.
We will now describe the invention as set forth in the accompanying drawings, in
which
Fig. 1 is an elevation shewing on the right the fixing of the former disks,
and on the let that of the new system, as placed on the tube.
Fig. 2 is a longitudinal section of Fig. 1.
Fig. 3 is a plan view of the new system of disk placed on the tube.
Fig. 4 is a plan of the same, but opened out, and showing in the centre the
tube on which it is to be placed, and above and below the the bolts by means of
which it is fixed.
Fig. 5 is a plan of the old disk fixed on the tube.
Fig. 6 is a plan of the same, but opened out.
Fig. 7 shows a plan of the upper surface of the key of the old disk.
Fig. 8 is a plan of the lower side of same.
Fig. 9 is a cross-section on the line A-B. (Fig. 7) of the same key.
a, is the improved disk. b, b, are lugs on same having bolt holes. c, c, are bolts
for connecting same.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
A system of fixing the disks in freezing chambers, consisting in the application,
on both sides of each of the two parts into which the disk is divided, of a
pierced lug, which coincides with a similar lug on the other part of the disk when
both are joined together, the said lugs being connected together by bolts and nuts
or their equivalents, as herein described and set forth.
Dated this 28th day of February 1895.
8. S. BROMHEAD,
97 Newgate Street, London, E.C., Patent Agent.
8. S. BROMHEAD,
97 Newgate Street, London, E.C., Patent Agent.