Improvements in Ice Cream Freezing Machines.
Year: 1889

page_text: Date of Application, 15th July, 1889
Complete Specification Left, 7th Jan., 1890-Accepted. 8th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Ice Cream Freezing Machines.
I PETER DUTTO of No. 39 Trinity Street Borough London in the County of Surrey,
Miller do hereby declare the nature of this invention to be as follows:-
This invention relates to ice cream freezing machines in which the flavoured cream
or other compound to be frozen is stirred in a container surrounded by any known
freezing mixture such for example as broken ice mixed with salt.
The object is to reduce the labour necessary for rotating the ice cream container
and to make the flavoured cream or other compound more accessible for removal when
frozen.
For these purposes I provide a wooden tub mounted upon suitable legs. At the
centre of the tub in the bottom I provide a stuffing box through which a vertical
spindle passes carrying a mitre wheel gearing with another mitre wheel fixed upon a
horizontal shaft beneath the wooden tub.
The horizontal shaft is rotated in the usual way by means of a winch handle.
Within the wooden tub a flange attached to the vertical spindle forms a base upon
which a galvanized iron cylindrical vessel is fixed so as to rotate with it.
This cylindrical vessel is fitted with a socket at its centre to receive a pivot
depending from the ice cream container, and having a projection upon it to engage in
the socket in such a manner that the ice cream container is thereby locked to the
galvanized iron cylinder and revolves therewith.
The agitator employed for stirring the flavoured cream or other compound to be
frozen is connected by its central spindle with a cross beam fixed above the wooden
tub in brackets from which the cross beam may be readily removed, and it remains
stationary while the ice cream container rotates.
The ice cream container has a cover provided with a slot in order that it may be
put on and removed without disturbing the agitator.
The apparatus is thus formed of three cylindrical vessels consisting of the wooden
tub, the galvanized iron cylindrical vessel and the ice cream container.
In the annular space formed outside the ice cream container, within the cylindrical
vessel, the broken ice and salt or other freezing mixture is placed and as the operation
proceeds, more freezing mixture being from time to time added, the cold liquid
produced passes through an overflow aperture in the cylindrical vessel and remains in
the annular space formed within the wooden tub outside the cylindrical vessel.
Thus the cylindrical vessel, containing the freezing mixture and the ice cream
container, becomes partly immersed in the cold liquid contained in the wooden tub
and its immersion so balances the load that the labour in turning the winch handle is
greatly reduced.
Dated this 15th day of July 1990
AYRTON & THOMAS,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Ice Cream Freezing Machines.
I PETER DUTTO of No. 39 Trinity Street, Borough, London in the County of Surrey,
Miller do hereby declare the nature of this invention and in what manner the same is
to he performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to ice cream freezing machines in which the flavoured cream
or other compound to be frozen is stirred in a container surrounded by any known
freezing mixture such for example as broken ice mixed with salt,
D

page_text: The object is to reduce the labour necessary for rotating the ice cream container
and to make the flavoured cream or other compound more accessible for removal when
frozen.
For these purposes I provide the apparatus hereinafter described by reference to the
accompanying drawings in all the figures of which the same part is represented by
like reference letters.
Figure 1 is a sectional elevation of the complete apparatus. Figure 2 is a plan of
the same. Figure 3 is an elevation of the pan which contains the refrigerating
compound. Figures 4, 5, and 6 are enlarged views of the clutch device for securing
the ice cream container.
The wooden tub A is mounted upon suitable legs B B B B and encloses two
pans fitted one within the other in a manner to be rotated in opposite directions. One
of these pans C serves to contain the freezing mixture such as broken ice mixed
with salt and is rotated by means of the mitre wheel D gearing with the mitre
wheel E fixed upon the horizontal shaft F which may be turned by hand by means of
the winch bandle G. The mitre wheel E also gears with another mitre wheel H to give
motion to the vertical spindle J which passes through the pan C and is surmounted
by a clutch K suitably shaped to engage with a counterpart L fixed on the under side
of the ice cream pan M for the purpose of communicating the motion of the vertical
spindle thereto.
The agitator N is stationary while the pan M rotates, being held by a square fitting
at a in the bridge piece P carried by the supports QQ¹ with which it is connected by
the hooks so as to be readily disconnected when it is required to remove the
agitator and the pan containing the ice cream.
I provide an overflow pipe R to carry off the surplus cooling liquid from the tub A
and I provide a curved pipe S oue extremity of which communicates with the interior
of the pan C and the other being open in the liquid contained in the tub A. By
this means the pan C is drained of the liquid resulting from the melting ice to a level
below that at which the cooling liquid stands in the outer tub A the draining action
being due to the rotary movement of the pan C. The pipe S is curved to rise to the
level of the overflow pipe R in order to prevent a return of the liquid from the tub A
to the pan C when its rotation ceases.
As the liquid collects in the tub A it forms a reservoir in which the pan C becomes
partly immersed and the load by this means is so balanced that the labour in turning
the winch handle is greatly reduced.
The ice cream pan M provided with a slotted cover which may be put on and
removed without disturbing the agitator.
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
claim is
The combination of the ice cream pan M. the refrigerating pan C and the outer
tub A in a manner to drain the cooling liquid from the refrigerator and store the
same in the outer tub so as to form a reservoir in which the refrigerator and ice
cream container are partly submerged substantially as described.
Dated this 7th day of January 1890.
0 ΜΠΟΓΛΟ
AIRTON & THOMAS,
Agents for the Applicant.