Improvements in Compounding Locomotives and adding Condensing Arrangements thereto.
Year: 1896

page_text: Date of Application, 23rd Sept., 1896
Complete Specification Left. 18th June. 1897-Accepted 31st July 1897
PROVISIONAL SPECIFICATION.
Improvements in Compounding Locomotives and adding Condensing
Arrangements thereto.
DAVID JOY of 85 Gracechurch Street, London in the Administrative County of
London Mechanical Engineer do hereby declare the nature of this invention to be
as follows:-
My invention has for its object the more economical employment of the steam
in Compound Engines as arranged for Railways by adding a Condenser, and so
utilizing all the force of the steam as is done in stationary or Marine Engines.
But as in Locomotive Engines the Steam-Blast is necessary for maintaining the
steam pressure in the boiler, I employ a valve for the distribution of the steam and
its exhaust from the final cylinder, furnished with special ports, such as at the
moment previously to the ordinary exhaust, will pass a part of the steam to be
exhausted, up the chimney to act as "blast," a small part may also be passed by
the opposite and complementary port to the other end of the cylinder, after which
the valve will close at both these ports, and open in the ordinary form to the exhaust
port, which communicates direct to the condenser. This coudenser I propose to
carry on or under the Tender, or as the Tank in a Tank Engine and to construct it
in the usual form employed in Marine Engines, only without the outer case into
which the condensing water is pumped, as I propose to employ the air through
which the engine is passing for effecting condensation, and to render this more
efficient, I form blades attached to the Tender wheels, constituting them so many
fans, or the arms of the wheels may form the fan blades, the draft from which is
directed among the tubes of the condenser, or in place of tubes I employ sheets
of thin metal corrugated over the central surface, while the edges are left plain, by
which they are attached in pairs, so forming corrugated surfaces, between the inner
surfaces the steam so admitted for condensation, and on the outer surfaces of which
the draft excited by the afore-described fans is directed to play.
Deted this 92nd dan af Santambon 100.0
COMPLETE SPECIFICATION.
Improvements in Compounding Locomotives and adding Condensing
Arrangements thereto.
DAVID JOY of 85 Gracechurch Street, London, in the Administrative County of
London Mechanical Engineer do hereby declare the nature of this invention and
ונrDo

page_text: in what manner the same is to be performed, to be particnlarly described and
ascertained in and by the following statement :-
My invention has for its object the more economical employment of steam in
Compound Engines as arranged for Railways, by adding a condenser, and so
utilizing the force of the steam as is done in stationary or marine engines. But as
in Locomotive Engines the steam blast is necessary for maintaining the stean
pressure in tho Boiler, 1 employ a valve for the distribution of the steam, and its
exhaust from the final cylinder, furnished with special ports, such as at the
moment previously to the ordinary exhaust, will pass a part of the steam to be
exhausted, up the chimney, to act as "Blast," a small part may also be passed by
the opposito and complementary port to the other end of the cylinder, after which
the valve will close at both those ports, and open in the ordinary form to the
exhaust port which communicates direct to the condenser.
The condenser I propose to carry on or under the Tender, or in Tank Engines,
in place of the tank and to construct it in the usual form employed in Marine
Engines, only without the outer case into which the condensing water is pumped,
as I propose to employ the air through which the engine is passing for effecting
condensation, and to render this more efficient, I form blades attached to the arms
of the tender wheels constituting these faus, the draft from which is directed among
the tubes of the condensers, or I make the arms of the wheels themselves the blades
of the fans.
Or in place of tubos, I employ sheets of thin metal, corrugated on the central surface,
while the edges are left plain, by which they are attached in pairs, so forming
corrugated surfaces, between the inner surfaces of which the steam is admitted for
condensation, and on the outer surfaces of which the draft excited by the aforesaid
fans is directed to play.
And in order that any invention may be well understood, I will describe with
reference to the accompanying drawings, the means in which it may be most easily
and satisfactorily performed.
In each of the figures the same letters refer to similar parts.
In Sheet 1, Figs. 1 and 2 are longitudinal and part cross section of the Smoke
box, Cylinder, and valvo of a Locomotive constructed according to my plan, by which
I pass a part of the exhaust steam to the blast pipe, to serve the usual purpose of
steam getting, and retain the remainder to be treated for producing vacuum, by
any of the well known methods.
The Cylinder C, and Ports P.P. are constructed as usual, and the Valve V, so far
as the distribution of steam is concerned, is also the same, but it is formed to
receive a balance plate l above it, and is furnished with two small ports b, b, passing
through it, and also through the balance plate d into the blast Pipe e. These two
ports b, b, are so placed that though each alternately gives connection with the
blast pipo e from one end of the cylinder, they may be adjusted, that there is a
moment when both are open partially together, so connecting both ends of the
cylinder, and allowing steam at blast pressure to pass over as cushion for the opposite.
end of the cylinder, after which both are closed by the face of the balance plate
above, and the valve opens at V¹ below to the ordinary exhaust port E, which is
here enlarged at E and E to form a vacuum chamber, and passes the remaining
steam into any common form of condenser, say as shown in Sheet 2, Figs. 3 and 4,
into a tubular condenser G, G, into which air is forced at H. H. by the motion of the
Engine, and this supply of air may be further increased as already named, by forming
the arms of the wheels as fan blades, J, J, and directing the air current formed
into the condenser chamber G1, Figs. 3 and 4, Sheet 2.
Or as shown in Sheet 1, Figs. 1 and 2, the passage E" may be carried up outside
the blast pipe, opening out by an annular space, E round the blast orifice e, this
combination forming an ejector for the small amount of steam left in the spaces E",
thus a vacuum will be formed behind the returning side of the piston.
The foregoing are practical methods of carrying out my Invention, but I do not

page_text: limit myself to the precise details illustrated in the drawings, as they can be varied
without departing from the nature of my Invention, uor to the special method of
producing the vacuum by cooling or by ejection, both of which plans I illustrate.
Having now practically described and illustrated the nature of my said invention,
and in what manner the same is to be performed, I declare that what I
claim is :-
First. The employment of a valve or valves to separate the steam to be exhausted
from a steam Engine, a part to be used as "blast" for the fire, and the remainder to
be treated by any of the known means for producing a vacuum.
Second. The employment of an air condenser where any of the wheels of the
machine are used as fans for inducing or increasing the current of air to be employed
in the condenser.
Third. The employment in combination with the treatment of the exhaust steam
described, of any of the known methods of producing a vacuum.
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