Improvements in Steam Generators.
Year: 1893

page_text: Date of Application, 20th June, 1893
Complete Specification Left, 26th July, 1893-Accepted, 26th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
I, JAMES NOAH PAXMAN, of The Standard Iron Works, Colchester, in the
County of Essex, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improved construction of tubular steam boiler, and it
consists in arranging the smoke tubes and the furnace flues in a specific manner,
the object being to facilitate the gaining of access to all parts of the interior of the
boiler for the purpose of inspection, cleansing or repair.
In carrying my invention into effect arrange the smoke tubes in two or more
groups according to the number of furnace flues. If there are two furnace flues
two groups is the best. The groups of smoke tubes are arranged at an angle with
the shell of the boiler so that while the groups are a considerable distance apart at
the front end of the boiler, they are close together at the back end thereof, and
inversely the space between the groups of tubes and the shell of the boiler is less
at the front end of the boiler than at the back end thereof. The tubes are fixed
to the end plates of the boiler in the well-known manner, the holes for the said
tubes being drilled at an angle to correspond with the angle at which the said tubes
are to be fixed, or as an alternative the end plates of the boiler may be shaped or
fashioned to bring them at right angles to the angles at which the tubes are to be
fixed.
I also prefer to make the furnace flues of a smaller diameter at the back end of
the boiler than at the front end, but this is not obligatory.
By this construction a man after getting into the boiler through the "manhole "
at the top thereof can pass down below the smoke tubes into the space between the
said tubes and the furnace flues and shell of the boiler respectively, through the
space between the two groups of smoke tubes at the front end of the boiler, and
through the spaces between the two groups of smoke tubes and the sides of the
shell of the boiler at the back end thereof.
The boiler is provided with the usual "manhole" for gaining access to the
interior thereof under the furnace flues.
Dated this 20th day of June 1893.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Generators.
I, JAMES NOAH PAXMAN of The Standard Iron Works, Colchester, in the
County of Essex, 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 :—
My invention relates to an improved construction of tubular steam boiler, and it
consists in arranging the smoke tubes and the furnace flues in the manner herein-
after described, the object being to facilitate the gaining of access to all parts of
the interior of the boiler for the purpose of inspection, cleansing or repair.

page_text: Figure 1 Sheet No. 1 is a view in side elevation partly in section, of my improved
boiler and
Figures 2 and 3 Sheet No. 1 are views in front and back end elevation thereof
respectively and
Figure 4 Sheet No. 2 is a view in sectional plan thereof, while
Figure 5 Sheet No. 2 is a view in sectional plan showing a modification in the
construction of my improved boiler.
Throughout the several views similar parts are marked with like letters of
reference.
The shell A of the boiler is cylindrical in form, and running through it are two
or more groups B of smoke tubes according to the number of furnace flues C. If
there are two furnace flues in the boiler it is sufficient to form the smoke tubes into
two groups. These groups of smoke tubes are arranged at an angle with the
shell A of the boiler, so that while the said groups are a considerable distance
apart at the front end plate a of the boiler, they are close together at the back end
plate a' thereof, and inversely the groups of smoke tubes are close to the shell of
the boiler at the front end thereof, and are close to each other at the rear end
thereof, thus providing the greatest possible space between the two groups of tubes
at the front end of the boiler, and the greatest possible space between the two
groups of tubes and the shell of the boiler at the rear end thereof. The tubes
forming the groups C are fixed to the end plates a and a¹ of the boiler in the well-
known manner, the holes for the said tubes being drilled at an angle to correspond
with the angle at which the said groups of tubes are to be fixed with respect to the
shell of the boiler as shown by Figure 4, or as an alternative the end plates a
and a', of the boiler may be dished, or otherwise shaped or fashioned, to bring that
part of them adapted to receive the tubes at right angles thereto as shown by
Figure 5, thus facilitating the drilling of the holes in the end plates of the boiler to
receive the tubes.
The furnace flues C are also preferably made of a smaller diameter at the back
end of the boiler than at the front end thereof, as shown by Figure 1, but this is
not obligatory.
By this construction a man after getting into the boiler through the manhole D
can pass down through the space y between the two groups of smoke tubes Bat
the front end of the boiler into the space X between the smoke tubes and the
furnace flues C, and through the spaces y', y', between the two groups of smoke
tubes B and the shell of the boiler at the rear end thereof into the spaces X¹, X',
between the two groups of smoke tubes, the furnace flues, and the sides of the
shell of the boiler.
The boiler is provided with the usual manhole E for gaining access to the
interior thereof under the furnace flues C.
I wish it to be particularly understood that I do not limit myself either to
the size and shape of my improved boiler, or to the number of furnace flues and of
groups of smoke tubes.
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 :-
1. The improvements in steam generators, as hereinbefore described and
illustrated by the accompanying drawing.
2. In a tubular steam generator, arranging the smoke tubes in groups inclined
towards one another in the horizontal plane so as to lie at an angle with the shell
of the boiler, as and for the purpose set forth.
3. The improved construction of steam generator as hereinbefore described and
illustrated by Figures 1, 2, 3, and 4 of the accompanying drawing.

page_text: 4. The improved construction of steam generator as hereinbefore described and
illustrated by Figure 5 of the accompanying drawing.
Dated this 26th day of July 1893.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.