Improved Apparatus for the Manufacture of Ice.
Year: 1895

page_text: Date of Application, 16th Dec., 1895
Complete Specification Left, 5th Sept., 1896-Accepted, 7th Nov., 1896
PROVISIONAL SPECIFICATION.
Improved Apparatus for the Manufacture of Ice.
I WILLIAM ANTROBUS of The District Ice Works, Park Road, Dukinfield, in
the County of Chester, Ice Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to that class of freezing machinery in which ammonia is
used as the freezing agent, the ammonia being passed first through a condensing
apparatus consisting of a coil or coils of piping enclosed in a tank, or in the open
air, and then through a coil or coils in a refrigerating chamber containing brine or
calcium chloride surrounding the vessels or moulds filled with the water to be
frozen.
Hitherto the coils of piping both for condensing and evaporating the ammonia
have been constructed in entire lengths of iron piping bent during manufacture
into the desired form.
The iron piping invariably used for this purpose is also liable to be attacked
and corroded both by the warm condensing water and by the brine in the
refrigerator.
My invention consists in the substitution for the iron piping, of coils made from
aluminium which may be made in sectious and coupled by ordinary screw couplings,
the aluminium being so soft that the last threads of the coupling and the screwed
ends of the pipes may be caulked tightly together, or other suitable means for
coupling the pipes may be adopted, and thus the diameter of the coil in the
condenser can if desired be reduced in size from inlet to outlet which was impossible
in the case of a coil made from a single length of iron piping.
The aluminium tubing may be very thin (as anhydrous ammonia will have no
effect upon it) and it can be bent to the desired form where it is to be applied as a
coil, and furthermore when so applied it will part with heat and communicate its
temperature to a surrounding fluid much more rapidly than the iron piping at
present used; in fact it will be found that the temperature of the ammonia leaving
the conderser is within two to five degrees the same as that of the cold water
entering the condenser, and in leaving the refrigerator is within five to ten degrees
that of the brine, or other medium.
It will further be found of great advantage to use moulds made of aluminium
instead of iron, as well as the aluminium coils above described. >>
Deted this 14th day of December 1895.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.

page_text: WILLIAM ANTROBUS Ice Manufacturer of The District Ice Works Dukinfield
Cheshire 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 that class of freezing machines in which ammonia is
used as the freezing agent.
My invention consists of the substitution of aluminium pipes or coils, in the
place of iron pipes or coils as at present used. The aluminium coils may be made
in sections and coupled by screw couplings and soldered by other suitable means
which may be found more advantageous.
By this means the diameter of the coils can be reduced in size from inlet
to outlet which was impossible from a coil made from a single length of iron
piping.
The aluminiuin tubing may be very thin-say half the thickness of iron tubing
invariably used as anhydrous ammonia has no effect upon it.
This patent claims the substitution of aluminium coils in the place of iron coils
in freezing machines.
Hitherto the coils both for condensing and evaporating the ammonia, have been
constructed entirely of iron (copper cannot be used for ammonia strongly attacks
and eats it away-aluminium has far greater thermal conducting properties than
copper).
Moreover when so applied the aluminium coils will be found far superior to iron
coils in transmitting temperature (in the proportions of 4 to 1)-in fact it will be
found that the temperature of the ammonia leaving the condenser-is the same
or at the most a few degrees higher than that of the cold water entering the
condenser likewise this small margin of temperature is also brought about in the
refrigerator.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed 1 declare what 1
claim is.
The substitution of aluminium coils or pipes in the place of iron pipes or coils in
ammonia refrigerating or freezing machines.
WILLIAM ANTROBUS,