Year: 1886

page_text: Date of Application, 29th Sept., 1886
Complete Left, 28th July, 1887.
Complete Accepted, 30th Aug., 1887,
I, JOSEPH JOHN TYLOR of 11 Little Queen Street in the City of Westminster Civil
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to the cisterns employed for containing the charge of water
for flushing water-closets, and especially to what are known as "two gallon waste
preventing cisterns." These cisterns are usually made either of a single casting of
iron, or of sheets or plates of wrought iron or steel, rivetted or welded together into
the desired form, and consequently they are somewhat costly, and when made of cast
iron they are of considerable weight. According to my present invention, I make
the cistern from a single sheet or plate of wrought iron, steel, mild steel, lead, or
other suitable metal, pressed, or stamped into the required shape, by means of dies and
matrices in a manner similar to that usually employed for producing hollow articles
from sheet metal, and in order to facilitate the pressing or stamping operation, and to
prevent tearing of the material at the corners during the process, I prefer to make
the cistern with its bottom and upright corners well rounded.
The pressing or
stamping to shape should be performed by a succession of operations, care being
taken to thoroughly anneal the material after each operation before proceeding with
the next. The necessary recesses, orifices, projections, or lugs for carrying the levers,
valves, or connections may in some cases be formed out of the same sheet of metal,
and by the same operation as the body of the cistern is formed.
Cisterns made in accordance with my invention are seamless, and not being rivetted
or welded, do not require expensive hand labour for their production, and they cost
less than cisterns made by the usual methods.
Dated this 25th day of September 1886.
J. J. TYLOR.
Per W. H. Beck,
115, Cannon Street, London,
Agent.

page_text: CUBIT DIE DI PIVATION
A New or Improved Waste Preventing Cistern for Water-closets.
I, JOSEPH JOHN TYLOR, of 2 Newgate Street, in the City of London, Civil
Engineer, 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, reference being had to the accompanying sheet of Drawings, and
to the letters and figures marked thereon, that is to say:-
This invention relates to the cisterns employed for containing the charge of water
for flushing water-closets, and especially to what are known as "two gallon waste
preventing cisterns." These cisterns are usually made either of a single casting of
iron, or of sheets or plates of wrought iron or steel, rivetted or welded together into
the desired form, and consequently they are somewhat costly and, when made of cast
iron, are of considerable weight. According to my present invention I make the
cistern from a single sheet or plate of wrought iron, steel, mild steel, lead, or other
suitable metal, pressed, or stamped into the required shape by means of dies and
matrices in a manner somewhat similar to that usually employed for producing hollow
articles from sheet metal; but in order to facilitate the pressing or stamping operation,
and to prevent tearing of the material at the corners during the process, I prefer to
make the cistern with its bottom and upright corners well rounded.
The stamping of cisterns of the kind above referred to, which are of oblong shape,
presents serious difficulties, for although round articles of large circumference and
depth have been successfully produced by stamping or pressing, oblong or partially
rounded objects of considerable depth, have not, so far as I am aware, been success-
fully produced by this process, because the metal tears at the corners where it is
subjected to exceptional strain. To obviate this result, I press or stamp the cistern
to shape by a succession of operations, that is to say, I pass the article through a
succession of dies and matrices adapted that each successive die and matrix reduces
the length and breadth of the article but increases the depth.
In the Drawings hereto annexed, Figure 1 is a plan of a matrix suitable for
producing articles of the kind above described, Figure 2 a transverse section of same,
Figure 3 a view of the die suitable for acting in concert with the matrix shown in
Figures 1 and 2. I place a sheet of metal of sufficient size to provide metal for the
completed article on the top of the matrix Figure 1. I then cause the pressure ring
or follower A, Figure 3, to descend on to the edges or margin of the sheet of metal,
and I then press down the die B, Figure 3, whereby the sheet of metal is forced into
the matrix C, Figures 1 and 2, so as to produce a shallow box or tray see Figure 4,
of length and width greater than that of the finished cistern, the metal to form the
sides being drawn from the rim or margin D which is prevented from puckering or
going out of shape by the pressure ring or follower A. The shallow box or tray,
Figure 4, is then forced into a smaller matrix where its length and width are reduced
and its depth increased as shown in Figure 5. The partly made cistern shown in
Figure 5 is then pressed into a still smaller matrix, and reduced still further in length

page_text: and breadth, and increased still further in depth as shown in Figure 6, which
represents a completed cistern. The metal for producing the increase in depth of the
cistern in each successive operation is drawn from the sides and from the rim D. It
is obvious that the number of successive operations required to transform a flat sheet
of metal into a properly shaped cistern, such as that shown in Figure 6, will depend
upon the nature of the material used, its thickness, ductility and so forth. In some
cases it will be found necessary to anneal the material after each operation before
proceeding with the next.
If desired the cistern may be formed with a well at the bottom as shown in
Figure 7 by means of a suitably shaped die, Figure 8, and a correspondingly shaped
matrix.
When steel is employed for producing my new or improved cisterns it is desirable
to employ the most ductile quality procurable, so that the metal may flow from the
rin or margin to the sides and bottom, as required in the successive operations,
without fracture or inequality.
The necessary recesses, orifices, projections or lugs for carrying the levers, valves
or connections may in some cases be formed out of the same sheet of metal, and by
the same operation as the body of the cistern is formed, by suitably shaping the
matrices and dies.
Cisterns made in accordance with my invention are seamless and, not being rivetted
or welded, do not require expensive hand labour for their production, and they cost
less than cisterns made by the usual methods.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is :-
The new or improved waste preventing cisterns, constructed from sheet metal by a
succession of stamping or pressing operations, as herein before described, and illus-
trated in the Drawings hereto annexed.
Dated this 28th day of July 1887.
J. J. TYLOR.
Per. W. H. Beck,
115, Cannon Street, London, E.C.,
Agent.