IMPROVEMENTS. IN TRAM- WAY AND OTHER LOCOMOTIVE ENGINES
Year: 1884

page_text: I, DAVID GRAEME MORRISON of Kilmarnock in the County of Ayr, Engineer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS. IN TRAM-
WAY AND OTHER LOCOMOTIVE ENGINES" to be as follows:-
This Invention which relates to improvements in tramway and other locomotive
engines has for its object to super heat the exhaust steam by direct contact with
the gases in and from the fire box and at the-same time to cause a forced draught.
through the tubes and chimney of the boiler whereby the said exhaust steam has
the same temperature as the gases from the fire box communicated to it and is
made to escape from the chimney as an invisible gas and without noise or with
much less noise than hitherto,
'
In
These objects are effected by, passing the exhaust steam from the cylinders into a
chamber or pipe situated at the rear end of the fire-box and within the steam space
or partly in the steam space and partly in the fire box, or wholly in the fire-box.
From the said chamber or pipe tubes project nearly across the fire box and towards
the boiler tubes, the distance between the exits or ends of the steam tubes and the
boiler tubes being not greater than can be passed or bridged by the steam.
passing across the said intervening space and in the boiler tubes the steam comes
into direct contact with the gases from the fire-box and thereby has the same
temperature as these gases communicated to it, whilst the said steam causes a
forced draught through the tubes and chimney and finally escapes as an invisible
gas and practically without noise.
The boiler tubes are either as a whole or part of their number, made tapered, the
smaller end being at the fire box thereby causing the escaping gases to make a
revolving or screw motion in the tubes.

page_text: .
I, DAVID GRAEME MORRISON of Kilmarnock in the County of Ayr, Engineer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN TRAM-
WAY AND OTHER LOCOMOTIVE ENGINES" 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 improvements in tramway and other locomotive
engines has for its object to super-heat the exhaust steam by direct contact with
the gases in and from the fire-box of the engine and at the same time to cause a
. forced draught through, the boiler tubes and chimney whereby the said exhaust
steam has the same or approximately the same temperature as the gases from the
fire box, communicated to it and is made to escape from the chimney as a
practically invisible gas and without noise or with mucli less noise than hitherto..
As shown in longitudinal section at figure 1, and in transverse section at figure 2,.
of the appended drawings these objects are effected by passing the exhaust steam
from the cylinders of the engine through a pipe or pipes into a chamber A, situated
above the rear of the fire-box B, and within the steam space I; the chamber A;
extending across the said space from side to side of the engine. To the said
chamber A, a series of pipes or tubes C, are connected these pipes projecting
towards, the fire-box ends of the boiler tubes D, the distance between the adjacent
ends of the tubes C, D, being not greater than can be easily bridged or passed by
the steam jets or currents without diffusion. The pipes or tubes C, may all be
arranged opposite the highest row of tubes D, or some of them may have their exit
'orifices or nozzles opposite lower rows of tubes D, in which. case the said exit
orifices may be enclosed as indicated at E, to protect them from the action of the
heat and otherwise..
The boiler tubes D, opposite the tubes C, are as seen at figure 1, preferably
tapered, the smaller ends being towards the fire box B, whereby the escaping gases
passing through these tapered tubes are caused to make a revolving or screw motion
in their course to the chimney..
In bridging or passing across the space F, intervening between the adjacent ends
of the tubes C, and D, and also when passing through the tubes D, themselves. the
exhaust steam comes into direct contact with the gaseous products of combustion
from the fire-box B, and thereby the steam has the same or approximately the
saine température as these gaseous products cómmunicated to it whilst at the same
time the steam jets or currents cause a forced draught through the tubes D, and
the chimney of the engine, finally escaping as an invisible or nearly invisible gas
or vapour and practically without noise.
.
to
Under a modified arrangement the chamber A, may be situated partly within.
the steam space I, and partly within the fire-box B, or as illustrated at figure 3, the
chamber A, may be situated at the rear of and outside the fire box B, the tubes C,
passing from it directly through the fire box, or the chamber may be situated at
the rear and outside of the steam space I, or as seen in vertical section at figure 4,
the steam chamber A, may be situated wholly within the fire box at or near its
front end in which latter case the tubes C, are or may be dispensed with a series of
nozzles or openings x, being made in the chamber with a space F, between them
and the fire-box ends of the boiler tubes D, When this arrangement is. adoptéd
the chamber A, may be surrounded with a water jacket or space.

page_text: 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 what
I claim is
First In tramway and other locomotives a chamber within the steam space or
partly therein and partly in the fire-box or at the rear of the fire box or steam
space to receive the exhaust steam from the engine, pipes connected to the
chamber A, so conducting the steam to near boiler tubes, (tapered or not,) that in
bridging a space; the steam is brought into direct contact with the gaseous products
of combustion and with them thereafter passed through said boiler tubes sub-
stantially as and for the purposes described and in part shown by figures 1, 2, and 3
of the appended drawings.
Second In tramway and other locomotives a chamber surrounded or not with a
water jacket and situated wholly within the fire-box to receive the exhaust steam
from the engine, said steam issuing from the chamber through openings or nozzles
opposite boiler tubes (tapered or straight) and so as in bridging a space to come
into direct contact with the gaseous products of combustion thereafter passing with
them through said tubes substantially as and for the purposes set forth with
reference to figure 4 of the drawings annexed.
GEO. M. CRUIKSHANK, Fel. Inst. P.A.,'
135, Buchanan St, Glasgow,
Agent.