Improvements in the Construction of Canvas Valves and Packings.
Year: 1889

page_text: Date of Application, 28th Oct., 1889
Complete Specification Left, 11th July, 1890-Accepted. 16th Aug. 1890
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Canvas Valves and Packings.
We, GUSTAV SCHUSEIL and CHARLES LE NOIR, both of Bremerhaven, in the
Empire of Germany, Manufacturers, do hereby declare the nature of our invention to
be as follows:-
This invention relates to the construction of canvas valves from two or more round
plates which are obtained from ray-shaped stamped out sheets, by connecting the
points of the turned over rays in the centre of the sheet, providing them with round
stitches and by effecting the connection of these plates to a valve by stitching.
The canvas is cut out in the shape of a star according to the desired size of the
valve by forming in an outer circle a twenty equal sided figure and by connecting the
angles of these twenty sides with a smaller twenty equal sided figure constructed in a
smaller concentric circle. The points of the rays of the star are connected in the
joint centre of both circles and the turned rays are sewn to the remaining intact part.
According to the thickness required for the valves two or more of these are sewn
together are placed with the rays one upon the other and are concentrically placed
together and after the necessary hole has been pierced through in the centre, they
are again joined by round-stitches around this hole so that the complete valve is
smooth on both sides.
It may be mentioned that for the construction of canvas valves it is not at all
necessary to construct always two regular twenty sided figures for the formation of
rays, but in accordance with the required size of the valves two other regular equal
polygons can be brought into use.
The main feature is that the turned over rays form a circle at the bent parts and
can be connected with their points in the centre.
Dated this 28th day of October 1889.
HERBERT & Co.,
Agents to Applicants.
COMPLETE SPECIFICATION.
Improvements in the Construction of Canvas Valves and Packings.
We GUSTAV SCHUSEIL and CHARLES LE NOIR, both of Bremerhaven, in the Empire
of Germany, Manufacturers, do hereby declare 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 :-
The improvements relate to valves made of canvas or sail cloth, which are intended
to serve as a substitute for india-rubber valves, the latter being liable to damage by
steam and grease etc. during long use, consequently a good deal of dirty thick grease
enters the boiler, and can only be removed with difficulty. The improved canvas or
sail-cloth valves are not subjected to damage by steam, grease, boiling oils etc. and
even after many years use will keep perfectly intact, the cylinder-grease reaching the
boiler only in a thin state and can be blown out more easily by the cleansing cock.
The invention consists in the construction of canvas valves from two or more discs,
which are obtained from ray-shaped stamped or cut out sheets, by connecting the
points of these rays when turned over in the centre of the sheet and by stitching the
discs together in circles.
The accompanying drawing will show how the valve and packings are made.
In performing the invention the canvas is cut out in the shape of a star as seen in
Fig. 1. According to the desired size of the valve, an outer circle C is divided
ימ

page_text: equally into points which form the apices of a star, the bases being formed by divisions
on the smaller concentric circle B. The points of the rays of the star S are folded
over and meet in the centre of both circles and theso turned over rays are sewn
together to the remaining part. (Fig. 2).
According to the thickness required for the valves two or more of these sewn
together are placed with the rays one upon the other and are concentrically sewn
together as at b and after the necessary hole has been pierced through in the centre,
they are again stitched around this hole, so that the packing or valve is smooth on
hoth sides.
The main feature is that the turned over rays form a circle at the bent paris con-
nected with their apices in the centre.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
The construction of canvas valves and packings from two or more discs, which are
obtained from ray shaped stamped or cut-out sheets, by connecting the points of these
rays, when turned over in the centre of the sheet and by stitching the discs together
in circles substantially as described and illustrated.
Dated this 11th day of ■Inly 18974
ted this
Ith day of
1897
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicants.