Improvements in Boilers with Galloway Tubes.
Year: 1891

page_text: Date of Application, 2nd Dec., 1891
Complete Specification Left, 22nd Aug., 1992-Accepted, 24th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Boilers with Galloway Tubes.
I, WILHELM CHRISTIANSEN, trading as Christiansen & Meyer, at Harburg on
the Elbe, in the German Empire, Engineer and Boiler Maker, do hereby declare
the nature of this invention to be as follows:
This invention relates to boilers having horizontal flues, and particularly to that
class which are known under the name of Cornish, or Lancashire boilers provided
with Galloway-tubes, and the object of the invention is to arrange the latter in such
a manner that firstly, the gases of combustion are caused to pass through the lower
portion of the flue and to thereby prevent the collection of the residues of
combustion, as the particles of the ashes are rapidly drawn away by the draft while
the coal-particles are burnt; and, secondly, to make the flue more easily accessible
than heretofore.
I obtain these objects by arranging the Galloway-tubes--either conical or
cylindrical with the horizontal flue of a boiler in such a manner that an imaginary
line through the points of intersection of the mathematical axes of the cross tubes
is a certain distance above the axis of the flue of the boiler. By this arrangement,
the four triangular compartments or free passages observed when looking in the
direction of the flue, will be of different sizes so that those lying above the axis of
the flue will be of the smallest and that lying beneath the same of the largest
area.
Although the greatest portion of the products of combustion will pass through
the largest of said compartments, they become, nevertheless, thoroughly agitated
and mixed together on their way through the flue, so that the particles of coal
heretofore carried away with the burnt gases into the smoke-box or chimney will
be entirely burnt, owing to the repeated contact with the hot gases, the velocity of
which being different according to the area of the free passages formed by the
Galloway-tubes when arranged according to my invention.
Dated this 1st dow of Drambo- 1901
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Boilers with Galloway Tubes.
1, WILHELM CHRISTIANSEN trading as Christiansen and Meyer at Harburg on
the Elbe, in the German Empire, Engineer and Boiler Maker, 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 boilers having horizontal flues and particularly to that
class which are known under the name of Cornish or Lancashire boilers provided
with Galloway tubes, and the object of the invention is to arrange the latter in such
a manner that, firstly, the gases of combustion are caused to pass through the lower
portion of the flue, and to thereby prevent the collection of the residues of
combustion, as the particles of the ashes are rapidly drawn away by the draft while
the coal particles are burnt; and secondly, to make the flue more easily accessible
than heretofore. I obtain these objects by arranging the Galloway tubes in the
manner represented by the annexed drawing, the Fig. 1 of which a longitudinal
transverse section and the Fig. 2 a cross section of a boiler. The Galloway

page_text: tubes a either conical or cylindrical-are arranged within the horizontal flue 6 of
the boiler in such a manner that an imaginary line through the points of intersection
of the mathematical axis of the cross tubes a is a certain distance above the axis
of the flue b of the boiler. By this arrangement the four triangular compartments
or free passages A, B, C, D, observed when looking in the direction of the flue b
will be of different sizes so that those denoted by A, B, C, D and lying above the
axis of the flue & will be of the smallest, and that denoted by A and lying beneath
the same of the larger area.
Although the greatest portion of the products of combustion will pass through
the largest of the said compartments, they become nevertheless thoroughly agitated
and mixed together on their way through the flue, so that the particles of coal
heretofore carried away with the burnt gases into the smoke box or chimney will
be entirely burnt, owing to the repeated contact with the hot gases, the velocities
of which differ according to the area of the free passages formed by the Galloway-
tubes when arranged according to my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In boilers having horizontal flues with cylindrical or conical Galloway-tubes the
arrangement of the latter in such a manner that an imaginary line through the
points of intersection of the mathematical axis of the cross tubes is a certain
distance above the axis of the flue substantially as and for the purpose set forth.
Dated this 22nd day of August 1892.
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.