Improvements in Locomotive Boilers.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Locomotive Boilers.
I, DUGALD DRUMMOND, Engineer, of Surbiton, in the County of Surrey,
hereby declare the nature of this invention to be as follows:-
-
This invention, which relates to boilers for locomotives, has for its object to
enhance the steam raising capacity of such boilers, and to that end it consists in
the provision of an arrangement of water tubes so connecting the sides or walls
of the fire box that a rapid circulation of water around these walls is produced,
whilst a large heating surface is added to the boiler.
The fire box is of the ordinary shape; but in the sides or walls of the inner shell,
orifices are formed for the reception of water tubes extending across the fire box
These
and the ends of which are expanded or otherwise secured in the side walls.
tubes are inclined and are fitted in two sets, one set in proximity to the firing
door being inclined in one direction and the set behind inclined in the opposite
direction, to promote circulation of the water in the space between the inner and
outer shells of the firm box. These water tubes are fully exposed to the heat of the
furnace which latter may be of the usual type in locomotives, and the gases from
which may partly circulate amongst the tubes on their way to the tubes leading
to the smoke-box which are secured in the tube plate at the rear of the fire box
in the ordinary way.
In order to provide for access to the water tubes for the purpose of removing
scale or incrustation or otherwise cleaning the tubes and for repairing or renowing
them, removable doors are fitted on the outer shell at both sides of the fire box,
these doors being seated on and secured by screw studs or bolts to flange pieces
riveted around the doorways. These doors may be hinged with slotted brackets
to allow the door to be drawn clear of the studs or bolts and then swung round out
of the way.
يمن
1
100
WALLACE FAIRWEATHER.
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents.
62, Saint Vincent Street, Glasgow,
Agent for the Applicant."

page_text: Improvements in Locomotive Boilers,
I, DUGALD DRUMMOND, of South Bank Lodge, Surbiton, in the County of Surrey,
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:-
This invention, which relates to boilers for locomotives, has for its object to
enhance the steam raising capacity of such boilers, and to that end it consists in
the provision of an arrangement of water tubes so connecting the sides or walls
of the fire box that a rapid circulation of water around these walls is produced,
whilst a large heating surface is added to the boiler.
The invention is illustrated by the accompanying drawings in which Figure 1
is a longitudinal elevation of the fire box end of a locomotive boiler and Figure 2
is a cross section of the same.
As therein represented the fire box is of the ordinary shape; but in the sides
or walls of the inner shell A, orifices are formed for the reception of water tubes B
extending across the fire box and the ends of which are expanded or otherwise
secured in the side walls. These tubes are inclined and are fitted in two sets, one
set in proximity to the firing door G being inclined in one direction, and the set
behind inclined in the opposite direction, to promote circulation of the water in
the spaces C between the inner and outer shells A and D of the fire box. These
water tubes are fully exposed to the heat of the furnace which latter may be of
the usual type in locomotives and the gases from which may partly circulate
amongst the tubes A on their way to the fire tubes H leading to the smoke-box,
which are secured in the tube plate I at the rear of the fire box in the ordinary
way.
In order to provide for access to the water tubes for the purpose of removing
scale or incrustation or otherwise cleaning the tubes and for repairing or renewing
them, removable doors E, E, are fitted on the outer shell D at both sides of the fire
box, these doors being seated on and secured by screw studs or bolts to flange
pieces F riveted around the doorways. These doors may be hinged with slotted
brackets to allow the door to be drawn clear of the studs or bolts and them swung
round out of the way.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that I ain
aware of Smith's Patent No. 6118 A.D. 1897, and I make no claim to anything
described or claimed in the specification thereof, but, what I claim is:-
In a locomotive boiler the arrangement in combination with water tubes extend-
ing across the fire box of removable doors secured in the outer shell of the side
walls thereof and serving to provide access to the tubes substantially as described.
Dated this 23rd day of August 1898.
WALLACE FAIRWEATHER.
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agent for the Applicant.