Improvements in Refrigerator or Evaporator Coils, or like Appliances Employed for Effecting Interchange of Temperature.
Year: 1893

page_text: Date of Application, 8th Aug., 1893
Complete Specification Left, 16th Jan., 1894-Accepted, 17th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in Refrigerator or Evaporator Coils, or like Appliances
Employed for Effecting Interchange of Temperature.
We, EVERARD HESKETH of 23 St. Swithins Lane in the City of London
Engineer and WILLIAM HENRY THOMAS of 15 Parliament Street in the City
of Westminster Civil Engineer do hereby declare the nature of this invention to
be as follows:-
In apparatus in which coils are used to effect an interchange of temperature
between fluids, and more especially in the case of coils used as hitherto in
refrigerators or evaporators, in which the gasification of a volatile liquid is
employed for cooling brine, or other medium, outside the coils, the said coils,
being one inside the other, the inner coil, or inner coils, is or are, of less length
than the outer coil, or outer coils, and consequently the passage of the fluid
through the coils is unequal as the tendency of the fluid is to take the-shortest
course.
According to this invention the coils are so made that they are all the same
length, or thereabouts, so that the aforesaid objection is overcome, the fluid passing
equally through all the coils. To attain this the tubing forming each coil is coiled
inwards in a spiral with the convolutions preferably in, or about, the same plane,
and then the tubing is brought into a second plane and coiled spirally outwards
with the convolutions in this second plane. The tubing may be similarly coiled
spirally inwards and outwards again any convenient number of times, the entering
and leaving ends being preferably at the outer convolutions of the spirals for
convenient attachment to the inlet and outlet common to all the coils. Any
number of these coils can be placed next to each other, for instance they may be
superposed in a tank containing brine to be cooled and as the coils are of equal
length, or approximately so, the fluid passes equally through them all. The way
in which the coils are wound presents the further advantage that the brine passes
in a circuitous manner between the coils so-that-proper contact of the said brine
with the coils is ensured.
Dated this 8th day of August 1893.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.
COMPLETE SPECIFICATION.
Improvements in Refrigerator or Evaporator Coils, or like Appliances
Employed for Effecting Interchange of Temperature.
We, EVERARD HESKETH of 23 St. Swithins Lane in the City of London
Engineer, and William Henry THOMAS of 15 Parliament Street in the City
of Westminster, Civil 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:-
In apparatus in which coils are used to effect an interchange of temperature
between fluids, and more especially in the case of coils used as hitherto in
refrigerators, or evaporators, in which the gasification of a volatile liquid is
employed for cooling brine, or other medium, outside the coils, the said coils, being
one inside the other, the inner coil, or inner coils, is, or are, of less length than
וגטמן

page_text: the outer coil, or outer coils and consequently the passage of the fluid through the
coils is unequal, as the tendency of the fluid is to take the shortest course.
According to this invention the coils are so made that they are all the same
length, or thereabouts, so that the aforesaid objection is overcome, the fluid passing
equally, or practically equally, through all the coils. To attain this the tubing
forming each coil is coiled inwards in a spiral with the convolutions preferably in,
or about, the same plane, and then the tubing is brought into a second plane and
coiled spirally outwards with the convolutions in this second plane. The accompanying
drawing of one coil thus made will make this clear. Figure 1 is an elevation and
Figure 2 is a plan. The tubing is shewn as being coiled inwards from the entering
end a in a spiral form as at 6 and then it is bent at c into another plane and
continued outwards in a spiral form as at d to the leaving end e. The tubing may
be similarly coiled spirally inwards and outwards again any convenient number of
times, the entering and leaving ends being preferably at the outer convolutions of
the spirals for convenient attachment to the inlet and outlet common to all the
coils. Any number of these coils can be placed next to each other, for instance,
they may be superposed and supported so as to be out of contact with each other
in a tank containing brine to be cooled and as the coils are of equal length, or
approximately so, the fluid passes equally through them all. The way in which
the coils are wound presents the further advantage that the brine passes in a
circuitous manner between the coils so that proper contact of the said brine with
the coils is ensured.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
Refrigerator or evaporator coils for the purpose described, each component coil
consisting of a length of tubing coiled in different planes, so that all the coils of
the apparatus are of the same, or practically the same length, substantially as
herein before described.
Dated this 16th day of January 1894.