IMPROVEMENTS IN VALVES FOR STEAM ENGINES PUMPS OR OTHER PURPOSES
Year: 1883

page_text: LETTERS PATENT to Thomas Lewis of Cardiff in the County of Glamorgan,
India-Rubber Merchant for an Invention of "IMPROVEMENTS IN VALVES
FOR STEAM ENGINES PUMPS OR OTHER PURPOSES" communicated to him by
P. H. Stangaard Engineer to the Flensburg Steamship Company of Flensburg
Germany
PROVISIONAL SPECIFICATION left by the said Thomas Lewis at the Office
of the Commissioners of Patents on the 25th October 1883.
THOMAS LEWIS of Cardiff in the County of Glamorgan India Rubber Merchant
"IMPROVEMENTS IN VALVES FOR STEAM ENGINE'S PUMPS OR OTHER PURPOSES
A Communication to me from P. H. Stangaard, Engineer to the Flensburg Steamship
Company of Flensburg Germany
The object of this Invention is so to construct or manufacture-valves for Steam
Engines pumps or other purposes that whilst they give as tight a closure as do
India Rubber Valves they are far more durable and this without increase of first
cost.
According to the said Invention canvas, cotton-duck, or other like fabric, is
taken and cut, or formed, into layers of the shape of the required valvo-A Caso
is made of similar material preferably by joining two layers together by sowing
them to an edge or rim pieco of like material of the necessary width corresponding
to the width of valve to be produced; the seams are then flattened out and the
case is reversed. A slit is made in a suitable part of the case and by means of this
slit the several layers of material are introduced and superposed in the caso until
it is full. The said layers and case are then sewn together preferably by means of
circular concentric rows of stitches. The article thus produced is soaked in a
preservative and hardening liquor mixture or preparation which may consist of
oily and drying substances such for example as boiled linseed oil and terebine--
After a sufficient quantity of this mixture is taken up the article may be passed
through rollers which causes the mixture to thoroughly penetrate to the innermost
layers. The article is then dried and the hole for the rod may then be formed
by cutting with a rotating knife or other cutter. I include as materials for carrying
this Invention into effect Hemp Flax Cotton jute or wool or the like vegetable
or animal fibres either woven or otherwise fabricated and joined to form the valve
by sewing or in any other suitable way for example the valve may be woven or
otherwise formed in a layer the thickness of the valve and then be soaked and
pressed as hereinbefore described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filod
"
by the said Thomas Lewis in the Patent Office on the 25th April 1884.
THOMAS LEWIS of Cardiff in the County of Glamorgan India Rubber Merchant
"IMPROVEMENTS IN VALVES FOR STEAM ENGINES PUMPS OR OTHER PURPOSES
a communication to me by P. H. Stangaard, Engineer to the Flensburg Steam
Ship Company of Flensburg Germany
The object of this Invention is so to construct or manufacture valves for steam
engines pumps or other purposes that whilst they give as tight a closure as do
India rubber valves they are far more durable and this without increase of first
cost
According to the said Invention canvas cotton duck or other like fabric is taken
and cut or formed into layers of the shape, of the required valve. A case is made
of similar material and shape preferably by joining two layers by sowing them
together at the edges or by sewing them to an edge or rim piece of like material of
the necessary width corresponding to the thickness of valve to be produced; the
seams are then flattened out and the case may be reversed so that the seams aro
presented inwards. A slit or opening is made or left in a suitable part of the case
and by means of this slit the several layers of material herein before mentioned are
introduced and superposed in the case until it is full. The said layers and case are
then sewn together preferably by means of circular concentric rows of stitchos.
Or the layers and covering may be joined together in any other suitable way for
example by joining together the inner layers between outer layers of larger diameter
which can be turned in at the edges and there be sewn together. The article thus
produced may then be soaked in a preservative and hardening liquor mixture or
preparation which may consist of oily and drying substances such for example as
boiled linseed oil and terebene. After a sufficient quantity of this mixture is taken
up the article may be passed through rollers which causes the mixture to thoroughly
penetrate to the innermost layers. The article is then dried and the hole for the
rod may then be formed by cutting with a rotating knifo or other cutter.
Figure 1 of the accompanying drawing is a transverse section and Figure 2 is a
plan of a valve made according to my Invention. A represents the outer case.
B the interior layers of canvas or the like O the rows of stitches by which tho
case and layers are sewn together and D the hole for the rod which hole may be
lined with metal with flanges at each side partly overlapping the valve.
I include as materials for carrying this Invention into effect hemp, flax, Cotton
juto or wool or the like vegetablo or animal fibres either woven or otherwiso
fabricated and joined to form the valve by sewing or in any other suitable way for
example tho valve may be woven or otherwise formed in a layer the thickness of
the valve and then bo soaked and pressed as hereinbefore described
Having now described and particularly ascertained the nature of the said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original
and therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is.
The manufacture of valves for steam engines pumps or other purposes
substantially as herein before described.
In witness whereof I the said Thomas Lewis have to this my Specification sot
my hand and seal this twenty fifth day of April One thousand eight hundred and
eighty four