Appliances for Promoting Circulation in Galloway Boller Tubes.
Year: 1891

page_text: Date of Application, 22nd Oct., 1891
Complete Specification Left, 22nd July, 1892-Accepted, 27th Aug., 1892
PROVISIONAL SPECIFICATION.
Appliances for Promoting Circulation in Galloway Boller Tubes.
I, CHARLES JOHN GALLOWAY, of Knott Mill Iron Works, Manchester, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention to
be as follows:-
In many boilers, the flues are traversed by a number of taper tubes known as
Galloway tubes," arranged at various inclinations with their smäller ends lowest,
so that the water, as it is heated, rises through these tubes, and issuing from their
larger mouths mingles with the body of water above. The present invention has
for its object to promote and render more positive the circulation through such
tubes.
For this purpose, according to one arrangement, I fix within the upper part of the
Galloway tube a circular plate of less diameter than the tube at that place, so that
there is an annular passage around its edge for the ascending current of water,
while the plate prevents any descent at or near the middle of the tube.
Instead of placing the plate within the tube it may be placed at a little distance
above the upper mouth of the tube allowing the ascending current to issue all round
from under its edge. Instead of a plate thus placed within or above the tube, &
dish may be employed, this serving to collect and retain impurities deposited from
the water.
The dish may be of considerable depth so as to constitute a tube with its lower
end closed, suspended within the Galloway tube and of smaller diameter, so as to
leave all round it an annular passage for the ascending current.
According to another arrangement, I fit to the upper end of the Galloway tube a
mouth piece having within it a plate, dish or tube as above described, this mouth
piece rising to about the water level or some little distance above it. In the latter
case, the water flows over around its outer edge and thus gives freedom for escape,
directly into the steam space, of the globules of steam which have been formed
within the tube, without their having to pass through the body of water above the
flue. When a mouth piece is thus applied to a Galloway tube, the plate, dish or
tube, instead of being fixed within the mouth piece itself, may be fixed somewhat
lower down in the body of the tube.
Dated this 22nd day of October 1891.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Appliances for Promoting Oirculation in Galloway Boiler Tuhes.
I, CHARLES JOHN GALLOWAY, of Knott Mill Iron Works, Manchester, in the
County of Lancaster, 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 many boilers, the flues are traversed by a number of taper tubes known as
Galloway tubes, arranged vertically or at various inclinations with their smaller
ends lowest, so that the water, as it is heated, rises through these tubes, and issuing
from their larger mouths mingles with the body of water above.
The present
invention has for its object to promote and render more positive the circulation
through such tubes. For this purpose, according to one arrangement_shewn
diagrammatically in section at Fig. 1. I fix within the Galloway tube T a circular

page_text: plate P of less diameter than the tube at that place, so that there is an annular
passage around its edge for the ascending current of water, while the plate prevents
any descent at or near the middle of the tube. Instead of placing the plate within
the tube it may be placed at a little distance above the upper mouth of the tube as
shewn at P allowing the ascending current. to. issue all round from under its edge.
Instead of a plate thus placed within or above the tube, a dish may be employed as
shewn in Fig. 2by the dotted line ID this serving to collect and retain impurities
deposited. from the water.
L
The dish may be of considerable depth so as to constitute a tube E-with-its
lower end F closed, suspended within the Galloway tube T and of smaller diameter,
so as to leave all round it an annular passage for the ascending current.
According to another arrangement shewn in Fig. 3 I fit to the upper end of the
Galloway tube T a mouthpiece M this mouthpiece or the tube itself having within
it-a, plate, dish or tube G. as above described, this mouthpiece rising to about the
water level L or some little distance above it. In the latter case, the water flows
upward around its outer edge and thus gives freedom for escape, directly into the
steam space, of the globules of steam which have been formed within the tube,
without their having to pass through the body of water above the flue.
The tubes E and G shewn in Figs. 2 and 3 are preferably closed at the bottom
as shewn in these figures, their bottoms may however be more or less open, when it
is not desired to employ them for collecting or retaining impurities.
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
1.claim. is :
In combination with a Galloway boiler tube, a baffle plate, dish or tube placed in
or over the tube and offering around it annular passage for circulation, substantially
as and for the purposes herein set forth.
Dated:this 22nd day of July 1892.
ABEL & IMRAY,
Agents for the Applicant.