Improvements in and relating to Feed Water Heaters, Condensers, and the like.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Feed Water Heaters, Condensers,
and the like.
GEORGE GREEN, Crosshills, via Keighley, Yorkshire, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention has for its object to increase the efficiency of the heating or
cooling surface (as the case may be) of either tubes or pipes by the insertion
of a metallic worm or screw of any suitable pitch & thickness, loosely fitting in
the said tube or pipe which will serve to conduct the flow of either steam or
water in a thin annular volume around the circumference, causing same to
revolve; and by the action of centrifugal force to beat against the walls of the
tube or pipe, and at the same time travelling gradually along the length of the
tube or pipe according to the pitch of the worm or screw, thus bringing each
separate layer of either steam or water in contact with practically the whole
surface of the tube or pipe by the action of revolving & travelling at the same
time.
The invention is applicable to any apparatus in which tubes or pipes are used
for the heating of liquids or gases, or for the cooling of same, such as: feed
water heaters, condensers and the like.
COMPLETE SPECIFICATION.
Improvements in and relating to Feed Water Heaters, Condensers,
and the like.
GEORGE GREEN, Crosshills, via Keighley, Yorkshire, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention has for its object to increase the efficiency of the heating or
cooling surface (as the case may be) of either tubes or pipes.
The invention is illustrated in the accompanying sheet of drawings which
shows one method of carrying it into practice.
Fig. 1, is a longitudinal part section of a piece of tube or pipe into which is
inserted a suitable metallic worm or screw. Fig. 2, is an end view of the same.
The invention consists of a method of deflecting the flow of either steam or
.
077

page_text: water in its passage through the tubes or pipes in any apparatus in which the
said tubes or pipes are used for either heating or cooling liquids or gases.
The invention is carried out in the following manner:-
It is found that in passing steam or water through a plain tube or pipe for
the purpose of either heating or cooling any liquid or gas as the case may be,
that if the aforesaid steam or water be allowed to pass freely through a plain
tube or pipe, that only the external portions of the steam or water come into
actual contact with the tube or pipe surface, the bulk of the central portion or
the core being entirely free to pass through the tube or pipe without imparting
its heat or cold as the case may be, to the surrounding conditions outside the
tube or pipe.
The object of my invention is to prevent this by inserting within the whole
length of the tube or pipe a metallic worm or screw of any suitable pitch and
thickness, loosely fitting in the said tube or pipe which will serve to conduct the
flow of either steam or water in a thin annular volume around the circum-
ference, causing the same to revolve, and by the action of centrifugal force to
beat against the walls of the tube or pipe, and at the same time travelling gradu-
ally along the whole length of the tube or pipe according to the pitch of the
worm or screw, thus bringing each separate layer of either steam or water into
actual contact with practically the whole surface of the tube or
action of revolving and travelling at the same time.
pipe by the
In carrying out my invention in the manner illustrated in the drawings, I
construct the worm or screw A of any suitable metal to which may be given any
desired pitch, coil or twist, and of any desired cross-section, the diameter of
which is slightly less than that of the tube or pipe B into which it is to be
inserted.
I do not bind myself to any particular form of worm or screw.
At one end of the worm or screw, the end at which the steam or water enters
the tube or pipe I make suitable provision for fixing or suspending the same
within the tube or pipe by such means as a cotter C, or its equivalent, as shown
in Fig. 1.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what
I claim is: :-
(1) A metallic tube or pipe having an inserted metallic worm or screw for
use in feed water heaters, condensers and the like for the purpose of deflecting
the flow of either steam or water in its passage through the same as herein before
described and illustrated.
(2) A metallic tube or pipe having an inserted metallic worm or screw arranged
as herein before described, and arranged substantially as shown with reference to
the accompanying drawings.
1
1
D
1000