Year: 1886

page_text: Date of Application, 30th Nov., 1886.
Complete Left, 29th Aug., 1887.
Complete Accepted, 30th Sept., 1887.
I, DONALD BARNS MORISON of 9, South Crescent Hartlepool in the County of
Durham, Engineer do hereby declare the nature of this invention to be as follows:-
My invention consists in the formation of an air receiver on the front, back or other
suitable part or parts of the smoke box of a marine or other boiler, the air being forced
into this receiver by any suitable apparatus and led to the furnaces by channels
preferably between the smoke box doors. The air receiver may be formed next the
smoke box with or without an air casing on its outside or the air casing may be next
the smoke box with the air receiver on the outside this air casing being preferably in
connection with the fan or other suction as described in the specification
No. 8187-1885. The air in its passage over or through the smoke box or other part
or parts is somewhat heated and may be still further heated by the use of conductor
pins one part of these pins being in direct contact with the waste gases and the other
part in direct contact with the air in any of the channels or passages leading either to
or from the fan or other apparatus. The casing covering or partially covering the
furnace mouths may extend over all the furnaces of one or more boilers so as to form
one common receiver having suitable regulating valves or it may be subdivided so
that each furnace has a separate connection to the air receiver on the smoke box, a
regulating valve being fitted in such connection if required and worked either by
opening the firedoor or in any other suitable method.
Dated this 29th day of November 1886.

page_text: OUMILETE SPECIFICATION.
Improvements in Artificial Air Supply to Boiler Furnaces.
I, DONALD BARNS MORISON of 9 South Crescent Hartlepool in the County of
Durham 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 said invention relates to improvements in the construction and arrangement of
a receiver, into which air is forced, and from which it is led, before entering the
furnaces of a marine or other boiler.
In carrying out my invention in the case of one or more marine boilers the air
receiver is arranged on the front, or other suitable part of the smokebox, the air being
forced into this receiver by any suitable apparatus and led therefrom to the furnaces
by suitable pipes or channels. The air receiver may be formed next the smokebox,
with or without an air casing on its outside, or the air casing may be next the smoke-
box with the air receiver on the outside. Each furnace may have a separate
connection to the air receiver on the smokebox, a regulating valve being fitted in
such connection if required, and worked by the opening of the furnace doors, or in
any other suitable manner; or there may be one or more pipes or channels to convey
the air from the air receiver on the smokebox to a casing covering the whole or part
of the furnace mouths of one or more boilers as may be most suitable.
Examples of my improved arrangement of air receiver are shewn on the
accompanying sheets of explanatory drawings, in which similar letters in all the
figures represent similar or corresponding parts.
Figures I and II are front and side elevations of two single-ended marine boilers.
The air receiver A is formed on a portion of that part of the smokebox which is just
above the tube doors, and is covered by the air casing on its outside. Air is forced
into this receiver through the pipe B, and is led to the casings covering the mouths
of the furnaces by the pipes or channels C.
The pressure in the air receiver on the smokebox being approximately equal
throughout, each furnace receives an equal quantity of air. The inlet pipe B may
enter the receiver at any suitable part, the air being forced in either heated or at the
temperature of the surrounding atmosphere by means of a fan or other suitable
apparatus.
Figures III and IV are front and side elevations of two double-ended marine
boilers, the air receiver in Figure IV being formed, on one end, on the outside of the
ordinary air casing and on the other end on the inside of such casing.
Figures V and VI are similar to Figures III and IV but shew the air receiver
formed circular in section on one end and on the other semi-circular in section.

page_text: In all the figures the casings covering the furnace mouths are shewn separate, they
may however formn one common casing, or two casings each common to a number of
furnaces, the air being led to these furnace mouth casings from the air receiver on
the smokebox, at such places as will equalize the pressure in the furnaces.
my said
Having now particularly described and ascertained the nature of
Invention, and in what manner the same is to be performed, I declare that what
1 claim is :-
The arrangement of an air receiver on the smokebox of one or more boilers into
which air is forced before being led to the furnaces, substantially as hereinbefore
described.