Method of and Machine for Producing Objects of Ice by Pressure.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Method of and Machine for Producing Objects of Ice by Pressure.
I, KARL HEIMPEL, of 95, Klosterneuburgerstrasse, Vienna, Austria,
Engineer, 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 a method of and machine for producing figured objects
of ice by subjecting small ice pieces to pressure.
By way of exhaustive experiments the inventor has ascertained, that ice will
become, not only very plastic when subjected to a certain pressure, but will also
become consolidated. The plasticity of the ice is so great, that any desired figure
may be produced in suitable press moulds, as when freezing ice in moulds directly.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings showing a vertical section of the
machine constructed in accordance with my invention.
In carrying out the invention, the raw material (small pieces of ice) is placed in
a suitable mould into which is introduced a stamp-head, which gives the ice the
desired form. The pressure required may be produced by a suitable screw
mechanism by hydraulic means, through the action of knee levers, or a spring in
compression.
The machine necessary to carry the said method into effect is represented in the
drawing.
The press-table a on which is placed the mould b is rendered vertically movable
between two pillars c, c'. These pillars are fixed to the frame d of the machine
and carry at their upper extremities a cross-piece e which serves as a nut for a
pressure screw. The latter carries at its lower end a guide piece h which is
connected with the pressure screw and guided on the pillars c, c¹. On the guide
piece is rendered easily interchangeable the stamp-head g, the pressure screw
being operated by a hand wheel i.
The press-table a forms the bottom of the hydraulic press piston k and is raised
by screwing the piston j forward and lowering by screwing the same backwards.
The pistonj is hollow and furnished at its outer end with a thread and actuated by
that it
means of a screw spindle which is mounted in the frame d in such a manner,
may revolve but not slide, a hand wheel m being fixed to the pressure screw to
permit of actuating the piston j.
The ice objects are produced as follows:-
f
The ice in small pieces is placed into the mould b, whilst the stamp-head g is in a
raised position, after which it is lowered by means of the hand wheel i and screw
until the ice has received its preliminary form and the power of the operator is
exhausted. The hand wheel m is then turned which causes an effective trans-
mission of power resulting from the screw mechanism of the piston j and the
difference in the diameter of the two pistons. The piston k is then forced forward
as may be required, i.e. until the ice has received its final form, the stamp-head g
being then raised by turning the wheel and the finished object removed from the
mould.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is-
1st. The method of producing figured objects of ice by pressure, consisting in
packing ice into moulds and subjecting the same therein to a suitable pressure,

page_text: 2nd. In connection with the method specified in the preceding claim a machine,
consisting of the combination of two presses, the first one (preliminary press) being
adapted to subject the ice to a low pressure and the second one (final press)
being brought into operation to finish the ice object in shape, substantially as and
for the purpose set forth.
3rd. In the machine specified in the preceding claim, the table a having a
piston (final press) in connection with a smaller piston jactuated by means of a
screw mechanism, which on entering the hydraulic space forces the piston k
outwards, the preliminary press being actuated by means of a pressure screw f, at
one end of which is arranged the stamp-head g, substantially as set forth.
Dated this 23rd day of June 1893.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.