Improvements in Refrigerating Machines.
Year: 1893

page_text: Date of Application, 20th Dec., 1893
Complete Specification Left, 17th Jan., 1894-Accepted, 17th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in Refrigerating Machines.
We EVERARD HESKETH and ALEXANDER MARCET both of 23 St. Swithin's
Lane in the City of London Engineers do hereby declare the nature of our
invention to be as follows:-
In refrigerating machines, in which the expansion of a fluid passing through
pipes is employed to abstract heat and consequently produce cold it has hitherto
been customary to admit the fluid (for instance liquified carbonic acid) to a box
and thence into a number of pipes offering between them the necessary extended
surface. We have found that the efficiency of the expansion of the fluid is not
fully realized owing to the tendency of the fluid to pass through that or those of
the pipes which may present a shorter course or from other cause to pass very
unequally through the various pipes constituting the series. It is the object of our
invention to overcome this difficulty and to attain this object we make the lengthis
of pipes so that they communicate with each other or are continuous the one with
the other and thus the fluid is compelled to pass through the whole of the pipes of
the series in succession and thus the efficiency of the expansion of the fluid can be
realized throughout the whole of the lengths of pipes. If desired the pipes can
enlarge as they approach the outlet for the expanded fluid.
Dated this 20th dex of December 1892
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.Ć., Agents.
COMPLETE SPECIFICATION.
Improvements in Refrigerating Machines.
We EVERARD HESKETH and ALEXANDER MARCET both of 23 St. Swithin's
Lane in the City of London, Engineers 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 :-
In refrigerating machines in which the expansion of a fluid passing through pipes
is employed to abstract heat, and consequently produce cold, it has hitherto been
customary to admit the fluid (for instance liquified carbonic acid) to a box and
thence into a number of pipes offering between them the necessary extended
surface. We have found that in such an arrangement the efficiency of the .
expansion of the fluid is not fully realized, owing to the tendency of the fluid to
pass through that, or those, of the pipes which may present a shorter course, or
from other cause to pass very unequally through the various pipes constituting the
series. It is the object of our invention to overcome this difficulty and to attain
this object we make the lengths of pipes so that they communicate with each other,
or are continuous the one with the other and thus the fluid is compelled to pass
through the whole of the pipes of the series in succession and thus the efficiency
of the expansion of the fluid can be realized throughout the whole of the lengths
of pipes. If desired the pipes can enlarge as they approach the outlet for the
expanded fluid.
The accompanying drawing represents a coil made according to this invention.
Figure 1 being a sectional elevation and Figure 2 a plan. The coil commences

page_text: at a and is continued in convolutions 6 to the other end where the pipe is bent as
at c so that it is brought to a position within the convolutions b and then it is
continued in convolutions d to the top where it is bent as at e so that it is
brought to a position within the convolutions d and then it is confinued in
convolutions to the bottom where it is bent as at 9 so that it is brought into
a position within the convolutions f and then it is continued in convolutions / to
the top where it terminates at i.
We do not limit ourselves to the circular shape of the convolutions nor to any
particular number of series of convolutions one within the other, or others, nor to
any particular number of convolutions in each series as these may be varied
according to the machines with which the coils are to be used.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
°
In combination with refrigerating machines a pipe or continuous series of pipes
for the passage of the refrigerating agent during its evaporation the said pipe or
continuous series of pipes being arranged substantially as hereinbefore explained.
Dated this 17th day of January 1894.
JOHNSONS & WILLCOX,
Agents.