Improvements in the Methods of Preventing Condensation in the Cylinders of Steam Engines.
Year: 1886

page_text: Date of Application, 25th Nov., 1886
Complete Left, 19th Aug., 1887.
Complete Accepted, 20th Sept., 1887.
Improvements in the Methods of Preventing Condensation in the
Cylinders of Steam Engines.
I, DAVID JOY, of 8 Victoria Chambers, Westminster, S.W., Engineer do hereby
declare the nature of this invention to be as follows:-
My improvements consist in preventing to a considerable extent the condensation,
which takes place in the cylinders of steam engines, not by the usually applied external
methods, though I do not discard them, but by making the inside surfaces of such
cylinders, their ports, pistons, and other parts of non-conducting material, or by
covering them with non-conducting material. This non-conducting material may be
laid on in layers, and fastened to any of the surfaces, as cylinder lids, tops and
bottoms of pistons, and other parts, by any of the means usually employed in
cleading" or lugging non-conducting compositions on boilers. Or it may be
applied in the form of a paint or plaster, in which form it would be convenient
for covering the ports and other less accessible parts. The working surface of
the cylinder may be a steel or metal liner of the thinnest possible substance, bound
round and supported by a non-conducting material, such as paper or asbestos, wrapped
round and round and held together by heat resisting adhesive material, and so
forming as a whole a solid liner.
16
W. H. MUNNS,
Agent for the Applicant.

page_text: Improvements in the Methods of Preventing Condensation in the
Cylinders of Steam Engines.
I DAVID JOY, of 8 Victoria Chambers Westminster in the County of Middlesex
Engineer, do hereby declaro 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 improvements consist in preventing to a considerable extent the condensation
which takes place in the cylinders of steam engines not by the usually applied external
methods, though I do not discard them, but by making the inside surfaces of
such cylinders, their ports pistons and other parts of non-conducting material or
by covering them with non-conducting material. This non-conducting material may
be laid on in layers and fastened to any of the surfaces as cylinder lids, tops
and bottoms of pistons, and other parts, by any of the means usually employed
in "cleading" or lugging non-conducting compositions on boilers. Or it may
be applied in the form of a paint or plaster, in which form it would be convenient for
covering the ports and other less accessible parts. The working surface of the
cylinder may be a steel or metal liner of the thinnest possible substance, bound
round and supported by a non-conducting material, such as paper or asbestos,
wrapped round and round and held together by heat resisting adhesive material, and
so forming as a whole a solid liner.
In order that my invention may be fully understood and readily carried into
practical effect, I proceed to describe the drawing accompanying this Specification.
The figure represents a longitudinal section of the cylinder of a marine steam
engine, but my invention may be applied to any steam engine cylinder.
The cylinder, with its lids and piston, is constructed in the usual manner but
a little more clearance is allowed at each end beyond the travel of the piston.
The liner, A A, instead of being of the usual form and thickness is in this case a thin
ring of steel rolled or cast, or of Delta metal phosphor bronze, or other suitable
material, made as thin as possible, and preferably terminating with a flange, A¹,
at each end, and having annular flanges A", A" formed with it or fastened to
it at spaces along between the end flanges, A¹. Outside this ring is covered by
a thick coat of fire resisting non-conducting material preferably a mixture of asbestos
and cement B, B, laid round and allowed to harden under pressure or not, and
so to become a part of the structure of the ring itself imparting to it solidity
and rigidity. And this ring or liner being reduced to the size of the cylinder
it is to line, is forced into it with sufficient pressure to ensure its being a tight fit,
and is then secured therein in the usual way. Before being placed in the cylinder,
the outer surface of the non-conducting material may be protected by a ring

page_text: of thin metal, C, C joined permanently at each end to the true liner, A, by its
Hanges A¹, so preventing any of the non-conducting material escaping into the
cylinder, if it should get damaged.
The surfaces of the cylinder lids and of the piston are also protected from absorbing
heat by having similar heat resisting and non-conducting material laid over them
at D, D. and protected by sheet metal covers at E, E, screwed through or otherwise
fastened to the cylinder lids and piston. And the parts which cannot be so treated
such as the ports F F, are painted or plastered over with the non-conducting
material, the surfaces being previously roughened, so as to hold the paint or
plaster.
It will be readily seen that instead of relying on the usually applied external
methods of preventing condensation in steam cylinders, ports, etc. I aim at preventing
condensation directly by making the internal surfaces of non-conducting material, or
covering them with such material, or where the surfaces are moving in contact, as in
the cylinder body, by reducing the thickness of the metal surface to a minimum,
and backing and supporting it by the non-conducting material.
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
I. The application of a non-conducting material, prepared in any suitable manner,
to the internal surfaces of steam cylinders, ports, etc. for the purpose of preventing
condensation therein, substantially as described.
II. The application of a non conducting material prepared in any suitable manner,
combined with a thin metal lining, for attachment to the internal surfaces of steam
cylinders, ports etc. for the purpose of preventing condensation therein substantially
as described.
-
III. The application of asbestos as a non-conducting material combined with steel
to form a lining to the internal surfaces of steam cylinders, ports etc. for the purpose
of preventing condensation therein, substantially as described.
IV. The application of asbestos as a non-conducting material, to form a lining
to the internal surfaces of steam cylinders, ports &c. for the purpose of preventing
condensation therein substantially as described.
Dated this 19th day of August 1887.