Improvements in or connected with Locomotive Engines.
Year: 1893

page_text: Date of Application, 12th Aug., 1893
Complete Specification Left. 12th May, 1894-Accepted, 30th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in or connected with Locomotive Engines.
I, JAMES YATE JOHNSON, Gentleman, of 47 Lincoln's Inn Fields, in the
County of Middlesex, do hereby declare the nature of this invention (which has
been communicated to me from abroad by Jean Pierre Serve of 17 Quai de
Cuire, Lyons, (Rhone) in the Republic of France, Engineer,) to be as follows:-
This invention relates to means for utilizing the exhaust steam of locomotive
engines when the draught is produced mechanically as described in the Specification
annexed to Letters Patent No. 12530 dated 23rd July 1891.
In this case in fact the whole of the exhaust steam is available and it is desirable
to utilize it in such a manner as to effect a saving in the amount of fuel consumed
and at the same time increase the adhesion of the wheels and the stability of the
engine.
This result is obtained according to the present invention by providing on each
side of the locomotive a tubular heater constructed and arranged as hereinafter
described.
In carrying out this invention in practice there are placed upon or under the
foot plates or galleries which are usually provided on each side of the cylindrical
body or shell of a locomotive boiler two horizontal feed water heaters of the
tubular class being made sufficiently long and low in order that they may not
interfere with the working of the engine. The water supplied by the feed pump
or the injector preferably enters the series of tubes in the heater at the extremity
nearest to the fire box and escapes at the opposite extremity whence it passes into
the boiler at a point near the smoke box.
The exhaust steam escaping from the cylinder or cylinders enters a casing
enclosing the tubes of the heater at the end nearest to the smoke box and is
discharged at the opposite extremity of the apparatus.
The excess of uncondensed steam may be discharged at this place into an
auxiliary chimney or funnel provided for the purpose or it may be conducted into
the ordinary chimney or may be employed for any purpose for which it may be
required.
The heaters being placed upon the foot plates on each side of the boiler are
preferably constructed of rectangular shape and have the effect of raising the
level of the foot plates to the extent of a few inches only so as not to interfere
with the working.
The tubular heater employed by preference for the purposes of this invention is
provided with longitudinal tubes through which the water delivered by the feed
pump is caused to flow; tubular unions of special form being provided for the
introduction and discharge of this water and suitable pipes being connected to the
sides of the casing for the supply and escape of the exhaust steam. The water of
condensation formed in the apparatus is drawn off through a small syphon shaped
or trapped tube.
The casing of the heater being supplied solely with expanded steam its flat
sides are not exposed to any internal pressure which would be liable to bend
them out of shape.
The heater may be provided with tubes arranged transversely or with tubes bent
in the form of a coil or serpentine if preferred. In certain cases a single beater
may be employed receiving the exhaust steam from both cylinders of the
engine.

page_text: The principal advantages obtained by means of these improved arrangements
are as follows:-
1. By suitably developing or expanding the heaters it becomes possible to
heat the water to a sufficiently elevated temperature to cause the greater part of
the salts in solution to be precipitated and thereby obviate incrustation of the
tubes in the boiler and the heaters being capable of being readily taken to pieces
can be easily cleaned out when required.
2. The arrangement enables the feed apparatus pumps or injectors to be supplied
with cold water the water on leaving these apparatus being caused to enter the
heater whence it passes into the boiler.
3. It presents the additional advantage in certain cases of increasing the
adhesion of the wheels to the rails and imparting greater stability to the locomotive
'owing to the weight which is symmetrically distributed on each side of the
engine.
am aware that many arrangements have already been proposed for heating the
feed water for locomotive engine boilers but I am not aware that two tubular
heaters have been employed being constructed in the manner hereinbefore
described and placed horizontally upon or under the foot plates arranged laterally
on the cylindrical body of the boiler and arranged to receive the whole of the
exhaust steam rendered available by the employment of fans acting by exhaust
the excess being discharged through a special chimney or being employed for
other purposes as hereinbefore set forth.
Dated this 12th day of August 1893.
J. H. JOHNSON & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Locomotive Engines.
I JAMES YATE JOHNSON of 47 Lincoln's Inn Fields in the County of
London Gentleman do hereby declare the nature of this invention (which has
been communicated to me from abroad by Jean Pierre Serve of 17 Quai de Cuire,
Lyons (Rhone) in the Republic of France, Engineer) 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 means for utilizing the exhaust steam of locomotive
engines when the draught is produced mechanically as described in the Specification
annexed to Letters Patent No. 12530 dated 23rd July 1891.
In this case in fact the whole of the exhaust steam is available and it is desirable
to utilize it in such a manner as to effect a saving in the amount of fuel consumed
and at the same time increase the adhesion of the wheels and the stability of the
engine.
•
This result is obtained according to the present invention by providing on
each side of the locomotive a tubular heater constructed and arranged as hereinafter
described.
And in order that this invention may be fully understood I shall now proceed
more particularly to describe the same and for that purpose shall refer to the
several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all the figures in which
Figure 1 is a side elevation of a locomotive engine provided with a feed water
heater constructed according to this invention,
Figure 2 is an end elevation of the said locomotive,
Figure 3 shews in vertical section a feed water heater drawn to a larger
scale and
5. Figure 4 shews in longitudinal. and transverse section a modification of the feed
water apparatus.

page_text: In carrying out this invention in practice there are placed upon or under the
foot plates or galleries C which are usually provided on each side of the cylindrical
body or shell of a locomotive boiler A two horizontal feed water heaters B of the
tubular class being made sufficiently long and low in order that they may not
interfere with the working of the engine. The water supplied by the feed pump
or the injector preferably enters the series of tubes in the heater B by the pipe
at the extremity nearest to the fire box F and escapes at the opposite extremity
whence it passes into the boiler A by the pipe E at a point near the smoke
box G.
The exhaust steam escaping from the cylinder H by the pipe Jenters a
casing Benclosing the tubes of the heaters at the end nearest to the smoke box G
and is discharged at the opposite extremity of the apparatus.
The excess of uncondensed steam may be discharged at this place by the pipe K
into an auxiliary chimney or funnel L provided for the purpose or it may be
conducted into the ordinary chimney M or may be employed for any purpose for
which it may be required.
The heaters B being placed upon the foot plates C on each side of the boiler A.
are preferably constructed of rectangular shape and have the effect of raising the
level of the foot plates C to the extent of a few inches only so as not to interfere
with the working.
Figure 3 shews in vertical section a tubular heater B employed by preference
for the purposes of this invention. The said heater is provided with longitudinal
tubes through which the water delivered by the feed pump is caused to flow,
tubular unions a being provided for the introduction and discharge of the water
and pipes for the supply and escape of the exhaust steam. The water of con-
densation formed in the apparatus is drawn off through a small syphon shaped or
trapped tube d. In this arrangement the casing of the heater B being supplied
solely with expanded steam its flat sides are not exposed to any internal pressure
which would be liable to bend them out of shape.
Figure 4 shews another modification of a heater in which the tubes c are
arranged transversely, a indicates the pipes for the entrance and exit of the water
and 6 the pipes for the supply and escape of the exhaust steam; the direction
taken by the water is shewn by the arrows. Or, if desired in the arrangements
described the steam may be caused to pass equally well through the tubes and the
water to flow round the said tubes. The tubes if preferred may be bent in the
form of a coil or serpentine. The weight of the heaters may be reduced by
constructing them of aluminium or other suitable metal.
The principal advantages obtained by means of these improved arrangements
are as follows:-
1. By suitably developing or expanding the heaters it becomes possible to heat
the water to a sufficiently elevated temperature to cause the greater part of the
salts in solution to be precipitated and thereby obviate incrustation of the tubes in
the boiler and the heaters being capable of being readily taken to pieces can be
easily cleaned out when required.
2. The arrangement enables the feed apparatus pumps or injectors to be supplied
with cold water the water on leaving these apparatus being caused to enter the
heater whence it passes into the boiler.
3. It presents the additional advantage in certain cases of increasing the
adhesion of the wheels to the rails and imparting greater stability to the loco-
motive owing to the weight which is symmetrically distributed on each side of
the engine.
I am aware that many arrangements have already been proposed for heating the
feed water for locomotive engine boilers but I am not aware that two tubular
heaters have been employed being constructed in the manner hereinbefore described
and placed horizontally upon, or under the foot plates arranged laterally on
the cylindrical body of the boiler and arranged to receive the whole of the
exhaust steam rendered available by the employment of fans acting by exhaust

page_text: the excess being discharged through a special chimney or being employed for other
purposes as hereinbefore set forth.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
-claim is :-
11
1. In a locomotive engine in which the draught is produced mechanically and
without employing exhaust steam the combination with feed apparatus such as
pumps or injectors of two tubular heaters arranged horizontally on each side of the
locomotive and capable of receiving the whole of the exhaust steam, any excess
thereof escaping outside where it may be employed for other purposes substantially
as hereinbefore described.
2. In a locomotive engine in which the draught is produced mechanically and
in combination with the ordinary feed apparatus, two rectangular tubular heaters B
arranged on or under foot plates or galleries C situated on each side of the loco-
motive, the feed water flowing through the tubes of the heater and the exhaust
steam passing through a rectangular casing enclosing the said tubes or vice vers
and the uncondensed steam passing out by a chimney provided for the purpose
substantially as hereinbefore described and illustrated in the accompanying
.drawings.
Dated the 12th day of May 1894.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, Agents.