IMPROVEMENTS IN LOCOMOTIVE ENGINES AND TENDERS
Year: 1863

page_text: LETTERS PATENT to Archibald Sturrock, of Doncaster, in the County
of York, Engineer, for the Invention of "IMPROVEMENTS IN LOCOMOTIVE
ENGINES AND TENDERS."
Sealed the 2nd November 1863, and dated the 6th May 1863.
PROVISIONAL SPECIFICATION left by the said Archibald Sturrock at
the Office of the Commissioners of Patents, with his Petition, on the
6th May 1863.
I, ARCHIBALD STURROCK, of Doncaster, in the County of York, Engineer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
LOCOMOTIVE ENGINES AND TENDERS," to be as follows:―
The main object of my Invention is to utilize the adhesion derived from the
weight of the tender as a power to propel the train in addition to that of the
engine proper, instead of the engine, as under present circumstances, having
the dead weight of the tender to draw.
My Invention consists in fitting auxilliary cylinders and engines on or to
the tender, in connecting them through ordinary connecting rods in the usual
manner to the wheels of the tender, in coupling all the wheels of the tender,.
and in taking steam for the tender cylinders from the ordinary boiler which
supplies the engine proper.
My Invention also consists in forming the water tank in the tender
with a false bottom, and in leading the exhaust steam from the tender
cylinders into the chamber between the two bottoms. This steam heats the

page_text: water in the tank, and the steam which is condensed in the chamber runs into
a pipe connected with the boiler feed pumps, and is forced by the
the boiler.
pumps into
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Archibald Sturrock in the Great Sea! Patent Office on the
6th November 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ARCHIBALD
STURROCK, of Doncaster, in the County of York, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of May, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Archibald Sturrock, Her special licence that I, the said Archibald
Sturrock, my executors, administrators, and assigns, or such others as I, the
said Archibald Sturrock, my executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN LOCOMOTIVE ENGINES AND TENDERS," upon the condition
(amongst others) that I, the said Archibald Sturrock, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Offico within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Archibald Sturrock, do hereby declaro
the nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, reference being had to the Drawings hereunto annexed,
that is to say:-
The main object of my Invention is to utilize the adhesion derived from the
weight of the tender as a power to propel the train in addition to that of the
engine proper instead of the engine, as under present circumstances, having
the dead weight of the tender to draw.

page_text: My Invention consists in fitting auxiliary cylinders and engines on or to
the tender, in connecting them through ordinary connecting rods in the usual
manner to the wheels of the tender, in coupling all or some of the wheels of
the tender, and in taking steam for the tender cylinders from the ordinary
boiler which supplies the engine proper.
My Invention also consists in forming the water tank in the tender with a
false bottom, and in leading the exhaust steam from the tender cylinders into
the chamber between the two bottoms. Sometimes, instead of forming the
tender with a false bottom, I cause the waste steam to circulate through a
coil or series of pipes carried through the water in the tender, as shewn in
the accompanying Drawings; this steam beats the water in the tank, and the
steam which is condensed in the chamber or pipes returns into the tender and
is forced by the pumps into the boiler.
Figure 1 is a side elevation of a locomotive tender constructed according to
my Invention; Figure 2 is a horizontal section, one half shewing the bottom
of the tender tank, and the other half the engines; Figure 3 is a transverso
section, taken partly in front of the forward wheels, and partly through tho
receiver and condenser.
A is the pipe for conveying the steam from the boiler of the engine proper
to the tender cylinders B; D is a condenser, which receives the exhaust steain
conveyed from one of the tender cylinders by the exhaust pipe C; this con-
denser consists of two cast-iron boxes or chambers E, having each a wrought-
iron tube plate bolted on one side, and connected with each other by (say)
fifteen tubes; the steam entering the chamber passes along the tubes and is
5 condensed therein. There are two of these condensers D in the tank, one
connected with each of the tender cylinders. F, F, are pipes connected to
the chambers E, to convey the uncondensed portion of the steam into tho
atmosphere. The upper part of these pipes enters a larger pipe G, bolted to
the outside of the tank. On the tank plate, within the base of the pipe G,
o holes are punched to allow the water which is forced up the pipe to fall into
the tank. The pipe G has a transverse baffle plate K fixed in it a little
above the exhaust pipe. H is the tender crank axle; I, I, are the outsido
cranks, the wheels being coupled in the ordinary manner.
And having now described the nature of my said Invention, and in what
5 manner the same is to be performed, I declare that I claim,-
First, fitting locomotive engine tenders with auxiliary cylinders and engines
in manner and for the purpose herein-before described.
And, second, fitting the tanks of such tenders with a condensing chamber

page_text: or apparatus for receiving the exhaust steam from such auxiliary cylinders, in
manner and for the purposes herein-before described.
In witness whereof, I, the said Archibald Sturrock, have hereunto set my
hand and seal, this Third day of November, One thousand eight
hundred and sixty-three.
ARCHP. STURROCK. (L.s.)