Improvements in Freezing Machines.
Year: 1899

page_text: Date of Application, 17th Aug., 1899-Accepted, 7th Oct., 1899
COMPLETE SPECIFICATION.
Improvements in Freezing Machines.
I, JULES SCHALLER, of 41, Rue Taitbout, Paris, in the Republic of France,
Merchant, 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 freezing machine forming the subject of the present invention consists of
certain improvements not contained in the usual types of freezing machines.
My new freezing machine is shewn in the accompanying drawings in which:-
Figure 1 is a section of a compound freezing machine."
Figure 2 is a plan partly in section on the line 2-2, Figure 1.
Figure 3 is a vertical section of a freezing machine having one mould.
Figure 4 is a plan partly in section on the line 4-4 Figure 3.
The apparatus consists of a vessel A having double walls a b. This vessel
is cylindrical or of any other suitable shape. The casing or outside wall a is
about 0016 (or 3 of an inch) larger than the inner casing and the space
between them is filled with some substance which conducts heat badly such as
powdered charcoal, felt, or other suitable substance.
I may also make the vessels of wood or enamelled metal in which case the
double wall is no longer necessary. The freezing mixture which may be of any
suitable kind is placed in this vessel.
The said vessel is provided with a lid B having openings c which allow the
introduction of the freezing mixture.
In this lid are formed additional holes in which are placed the ice pail C or
moulds provided with lids and which contain the substance to be frozen.
The moulds are almost completely surrounded with the freezing mixture as is
shewn in Figure 1.
In the centre of the apparatus is a stirrer consisting of a crank handle D,
a rod E, resting at its lower end on a spindle e and provided with arms or
beaters F which can be rotated around the ice pails by means of the said handle D.
This stirrer serves to stir the freezing mixture.
In a freezing machine having only a single ice pail or mould the rod of the
stirrer passes down its centre through a sleeve d and rests in the same way
on a spindle, as hereinbefore described.
This freezing machine may also be used as an ice pail, if it be desired, by
adding a sieve or rose G and in that case a stirrer is no longer necessary and is
replaced by the said sieve.
In this case the freezing machine acts by means of a freezing bath which
does not require any acid. The freezing takes place solely by immersion of
the mould containing the cream to be frozen in the pounded ice to which some
salt water has been added. The freezing liquid is not rotated in any way.
Before using the machine, pounded ice is placed in the vessel of the freezing
machine up to the supports and on these supports is placed the sieve G which
receives the quantity of bay salt necessary to maintain the requisite temperature.
The cream to be frozen is poured into the mould C which is then closed.

page_text: So soon as the vessel is filled with pounded ice so high as the supports ga
solution of salt water consisting of 3 salt and 2/3 water is poured on it; then
the sieve G is put on and is filled with salt. The mould C containing the cream
to be frozen is next plunged into the freezing mixture which fills the vessel.
By thus immersing the mould in the vessel a portion of the freezing mixture is
forced up and overflows into the salt in the sieve; this dissolves little by little
and thus by its continual mixing with ice, maintains the lowness of the temperature
of the freezing mixture which goes down to 20 degrees.
This freezing machine requires no further attention since it works automatically,
it is only necessary to from time to time detach the lumps which at first freeze
along the inner wall of the mould. In 20 minutes the cream is frozen; the
mould is then taken out and the said mould is reversed and a hot cloth wrapped
round it.
Three successive ices can easily be frozen with the same mixture. In some
cases it is convenient to provide the receiver with a discharge tap.
In some cases also it is preferable to have beaters in the cream moulds in order
to scrape the walls of the moulds and also to keep the cream in motion while it
is being frozen.
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:
The apparatus substantially as described and illustrated in the drawings.
CARPMAEL & Co.,
Agents for the Applicant.