AN IMPROVED MANUFACTURE OF LINING FOR STEAM ENGINE CYLINDERS
Year: 1885

page_text: I EDWARD RICHMOND ALLFREY of South Eden Park, Beckenham in the County
of Kent, Engineer do hereby declare the nature of my invention for." AN
IMPROVED MANUFACTURE OF LINING FOR STEAM ENGINE CYLINDERS," to be as
follows:-
This invention relates to an improvement upon the Patent granted to me for
"The lining of steam engine cylinders" dated 19th February 1881 Nº 721. The
object of that invention was to make a steam tight connection between the cylinder
and steel lining or liner sufficiently elastic to allow for the endway movement of
the liner in the cylinder consequent on its varying temperatures.-This I effected
by the use of a double flanged ring coupling piece, secured at its outer edge to the
cylinder and at its inner edge to the liner.
My present improvement consists in giving elasticity to the liner itself or rather
in making the liner complete in one piece. By this means I avoid the necessity
for a flanged joint by which the elastic portion was coupled with the cylindrical
portion of the liner and I thus ensure a better result in working.
Supposing the corrugation to which the elasticity required is mainly due to lie
between the cylindrical portion of the liner and the inner flange I form the liner
with an increased thickness at the part where the corrugation will be, and the
flange of a thickness equal to the part that is to receive the bolt holes for attach-
ment to the cylinder. Then by means of a lathe I turn down so much of this
increased thickness of the wall of the liner at the outer and inner periphery as will
leave the remainder of the metal in the form of a corrugation in cross section..
The inner flange I also reduce to about one-half of its thickness and I thus pro-
vide an elastic extension of the cylindrical portion of the liner without the use of
the flanged joint.
It will be obvious that the same result may be obtained by rolling; suitable
rolls being provided for the purpose; so also, with the use of the best cast steel
and the employment of great skill by the Founder, liners of this kind might be
produced by casting. In some cases the corrugation will occur between the outer
Bange and the cylindrical portion of the liner its position being determined by
convenience.

page_text: I, EDWARD RICHMOND ALLFREY of South Eden Park, Beckenham in the County
of Kent, Engineer do hereby declare the nature of my invention for AN IMPROVED
MANUFACTURE OF LINING FOR STEAM ENGINE CYLINDERS, 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 an improvement upon the Patent granted to me for the
lining of steam engine cylinders dated 19th February 1881. No 721. The object of
that invention was to make a steam-tight connection between the cylinder and
steel lining or liner sufficiently elastic to allow for the endway movement of the
liner on the cylinder consequent on its varying temperatures.-This I effected by
the use of a double flanged ring coupling piece, secured at its outer edge to the
cylinder and at its inner edge to the liner.
My present improvement consists in giving elasticity to the liner itself, or rather
in making the liner complete in one piece. By this means I avoid the necessity
for a flanged joint by which the elastic. portion was coupled with the cylindrical
portion of the liner, and I thus ensure a better result in working.
In the accompanying drawing
Fig 1 shews in sectional elevation a steam cylinder fitted with my improved
elastic liner, the elastic portion of the liner being situated between the cylindrical
portion A of the liner and its internal flange A¹.
Fig 2 is a similar view of a cylinder and liner, the elastic portion being
situate between the external flange A2 and the cylindrical portion A of the liner.
In both these examples the elasticity is chiefly due to the formation in the liner
of an annular corrugation which will open or contract according to the contraction
or expansion of the metal in the direction of the axis of the cylinder.
When the corrugation is intended to lie as in Fig: 1, between the cylindrical
portion A of the liner and the inner flange A', I cast the liner with an increased
thickness at the part where the corrugation will be, and the flange of a thickness
equal to the part that is to receive the bolt holes for attachment to the cylinder, as
illustrated by the diagram Fig: 3.
By means of a lathe, boring machine or suitable tooling apparatus I cut away so'
much of this increased thickness of the wall of the liner at the outer and inner
periphery, as will leave the remainder of the metal in the form of a corrugation in
cross section. The inner Hange I also reduce in part to about one-half of its thick-
ness, and I thus provide an elastic extension of the cylindrical portion of the liner
without the use of the flanged joint. The dotted lines in Fig: 3 clearly illustrate
the mode of obtaining the required elasticity in the liner.
When it is desired that the corrugation shall occur between the cylindrical
portion A of the liner, and the external flange A2 as at Fig: 2, the casting must
have an extra thickness of metal at that part, as illustrated in the diagram Fig: 4
to provide for forming the corrugation.
T

page_text: It will be obvious that the result above described may be obtained by the process
of rolling; suitable rolls being provided for the purpose. So also the liners may
be of steel cast in one piece of the required form.
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
Making the elastic lining of steam engine cylinders complete in one piece as
above described, whereby the liner will be free to expand and contract in the direc-
tion of its axis, without any injurious strain on the liner, the cylinder, or the joints
connecting the liner to the cylinder.