Improvements in Refrigerating Chambers.
Year: 1897

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c. Act, 1883) as allowed by
the decision of the Chief Examiner of the 27th day of May. 1898.
Date of Application, 20th Jan., 1897-Accepted, 20th Feb., 1897
COMPLETE SPECIFICATION (AMENDED).
Improvements in Refrigerating Chambers.
I, EDWIN THOMAS WILLIAM HALL, of 7, Ashbourne Road, Derby, in the County
of Derby, Butcher, 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:-
The object of my invention is to provide a simple and effective method or means
of cooling and drying the air of refrigerating chambers.
Referring to the drawings which form a part of this specification:-
Figure 1 is a vertical section on line aa of Figure 2, shewing the application
of my invention.
Figure 2 is a sectional plan on line 66 of Figure 1.
In carrying out my said invention I provide an air-tight chamber A of wood
or other suitable material having an air-tight door or doors B, this air-tight
chamber contains a tank or tanks C of iron or other suitable substance filled or
partly filled with salt and ice or other suitable freezing mixture. In order to
keep the freezing mixture at its full strength the salt or the like is placed in a
separate box or tank 1) which is perforated at the sides and ends and placed inside
the larger tank C in which the ice is placed, or, in such a position that the liquid
from the melting ice in the said larger tank C has access to it, the salt or the like
being dissolved as the ice melts, thus keeping the mixture at full strength auto-
matically, that is to say as long as the said salt or freezing substance and ice last.
The tank C may be mounted upon feet E so that an air space P is left all round
between it and the walls of the outer chamber A to provide a complete circulation
of air, draught boards or other devices being employed if desired in any suitable
position or positions to throw the current of cold air which is generated by the
cooling effect of the freezing mixture in the tank C, out into the storage chamber
or chambers A', A2 which are also provided with airtight door or doors B', B³;
orifices or other equivalents F are left or formed in the partitions G to allow of a
continuous current of air circulating round the tank within the partition and
through the chambers in the direction of the arrows. By this means not only
is the temperature of the air within the chamber reduced but also the moisture
in the air is brought to the tank C and condenses on the sides thereof in the form
of snow or rime from whence it can be readily removed.
I may provide a tray H to catch the rime, or the moisture caused by the melting
rime or snow as it runs from the sides of the tank C, this moisture may be led
away by a small-bored pipe or drain I suitably trapped, the exit of moisture from
the outlet of which will be an indication that the freezing mixture within the
tank wants replenishing.
One of the principal features of my invention is the position of the overflow K

page_text: which passes out near the bottom of the inner tank C so as to take away the
warmest liquid; but which after passing outside rises as at K to within a few
inches of the level of the top of the tank the object of which is to obtain the
greatest possible benefit from the freezing mixture therein, the only attention
required is to keep the tank C well supplied with ice and the inner box or tank D
with salt or the like, the latter being supplied in more or less quantities as a greater
or less degree of cold is required, a cock O may be placed on the overflow pipe to
be opened or closed at will.
The object of the inner box or tank D) is to keep the freezing mixture near the
top of the tank C instead of allowing it to fall among the warmer water at the
bottom as it otherwise would do by specific gravity and thus as it melts be carried
out by the overflow pipe K whenever any addition was made to the contents of
the tank. In starting I prefer to fill up the tank C with cold salt water and place
salt among the ice in tank C but great care must be taken to very evenly distribute
the salt over the surface of the ice or among the ice placed in the tank and also to
prevent loss of freezing mixture through the syphon, as the solid salt and even
dissolved freezing mixture being heavier than the water, are apt to settle at the
bottom and but slowly and gradually dissolve or mix with the other water and if
care be not used may be accidently syphoned out first. If however the layers of
ice be inserted thinly and the salt be inserted also in thin layers of equivalent
quantity resting on these layers of ice, the salt melts the ice and cools the sur-
rounding water before it falls to the bottom keeping the salt and salt solution near
the surface until they have imparted their coolness to the surrounding water.
however owing to the slippery and mobile condition. of the ice, in the tank it is
almost certain in this case that some of the salt will fall to the bottom undissolved,
great care must be taken in using the syphon that the salt is not mechanically
carried out undisolved.
As
The storage chambers A, A, may be provided with any suitable hooks M,
shelves N or the like according to the purposes for which they are required, the
said chambers may be of any number and need not necessarily be arranged as
shewn.
It will be understood that when the air-tight doors are closed no further air is
admitted and the said air circulates and becomes dry and cold as already described.
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 refrigerating system or apparatus an airtight chamber A, a tank C con-
taining a freezing mixture, an air space P completely surrounding the tank C
and isolating it from the walls of the outer chamber A, in combination with a loose
box or tank D preferably perforated containing the freezing salt or chemical,
placed in such a position that the liquid from the melting ice has access to it thus
keeping the freezing mixture at its full or any desired strength, substantially as
described and illustrated.
2. In a refrigerating system or apparatus an airtight chamber A, a tank C con-
taining a freezing mixture, the said tank C being completely surrounded by an
air space P thus isolating it from the walls of the outer chamber A, a loose per-
forated box or tank 1) for containing the salt or the like, in combination with
an overflow K passing out at the bottom of the tank C and afterwards rising to
or nearly to the top of the said tank C substantially as described and illustrated.
3. The general arrangement and construction of the refrigerating chambers
taken as a whole substantially as and for the purposes described and illustrated.
Dated this 19th day of January 1897.
W. SWINDELL,
Imperial Chambers, Albert Street, Derby,
Agent for the Applicant.