IMPROVEMENTS IN STOP VALVES
Year: 1870

page_text: LETTERS PATENT to Henry Doulton, of High Street, Lambeth, in
the County of Surrey, for the Invention of "IMPROVEMENTS IN STOP
VALVES."
Sealed the 20th January 1871, and dated the 23rd July 1870.
PROVISIONAL SPECIFICATION left by the said Henry Doulton at the
Office of the Commissioners of Patents, with his Petition, on the
23rd July 1870.
I, HENRY DOULTON, of High Street, Lambeth, in the County of Surrey,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
STOP VALVES," to be as follows:-
This Invention has for its object improvements in stop valves. I con-
struct stop valves intended especially for use in connection with earthen-
ware pipes in the following manner :-I form the valve chamber in two
pieces of earthenware. One of these pieces consists of a short length
of pipe, with an ordinary socket at one end, and at the other end where
the valve seats itself it is ground smooth and to a true form. Around.

page_text: the last mentiond end an enlarged socket of a U form is made, and the
lower part of the socket is concentric with the pipe. At the upper part
of the socket an horizontal axis is carried in two eyes firmly leaded or
cemented into the earthenware, and further secured by nuts on the
outside. The valve which closes with the flow is hung upon this axis;
it is by preference an iron plate faced with wood or is of earthenware
with or without the iron plate. The axis has an are upon it with teeth,
either on the side or edge, and these teeth engage with a worm on a
vertical axis passing out through the top of the enlarged socket, and by
turning this worm the valve can be moved from and to its seat. The
other part of the valve box is a piece adapted at one end to fit the enlarged
socket, and at the other to fit into an ordinary socket.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Doulton in the Great Seal Patent Office
on the 21st January 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
DOULTON, of High Street, Lambeth, in the County of Surrey, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of July, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-fourth
year of Her reign did, for Herself, Her heirs and successors, give
and grant unto me, the said Henry Doulton, Her special license that
I, the said Henry Doulton, my executors, administrators, and assigns,
or such others as I, the said Henry Doulton, my executors, adminis-
trators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN STOP VALVES,"
upon the condition (amongst others) that I, the said Henry Doulton,
my executors or administrators, by an instrument in writing under
my, or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner the
same was to be performed, and cause the same to be filed in the Great

page_text: Seal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Henry Doulton, do hereby declare
the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say :-
:-
I
This Invention has for its object improvements in stop valves.
construct stop valves intended especially for use in connection with
earthenware pipes in the following manner:-I form the valve chamber
in two pieces of earthenware, one of these pieces consists of a short
length of pipe with an ordinary socket at one end, and at the other end
where the valve seats itself, it is ground smooth and to a true form.
Around the last mentioned end an enlarged socket of a U form is made,
and the lower part of the socket is concentric with the pipe. At the
upper part of the socket an horizontal axis is carried in two eyes, firmly
leaded or cemented into the earthenware, and further secured by nuts on
the outside. The valve which closes with the-flow is hung upon this axis,
it is by preference an iron plate faced with wood or of earthenware with
or without the iron plate. The axis has an arc upon it with teeth either
on the side or edge, and these teeth engage with a worm on a vertical
axis passing out through the top of the enlarged socket, and by turning this
worm the valve can be moved from and to its seat. The other part of
the valve box is a piece adapted at one end to fit the enlarged socket and
at the other to fit into an ordinary socket.
In order that my said Invention may be most fully understood, and
readily carried into effect, I will proceed to describe the Drawings
hereunto annexed.

page_text: and a is a recess for the worm for opening and closing the valve. The
part B is adapted at one end to the socket of the piece A, into which it
is fixed with Portland or other cement. At its other end it is suitably
formed to enter the socket of an ordinary earthenware pipe. The valve
as shewn in the Drawings, and as I prefer to construct it, consists of an
iron plate c with a facing of wood c¹ secured to it; c² is an axis connected
with the plate c by an arm c³. The parts c, c², and c³ are cast in one
piece, on which are also the worm wheel teeth c; d, d, are the eyes in
which the axis c² is carried, they are firmly fixed into the face of the
socket as, e is the worm for opening and closing the valve, it is cast with
a passage through it and is dropped into the recess a; fis an axis which
is passed through the worm e and through a hole formed for it in the
top of the socket at. The worm e is fixed to this axis by the pin f¹ and
the inner end of the axis enters a cavity prepared for it in the earthen-
The top of the axis fat f2 is squared to receive a key or handle
ware.
by which it may be turned.
Having thus described the nature of my said Invention and the
manner of performing the same, I would have it understood that what I
claim is the construction of stop valves substantially as described.
In witness whereof, I, the said Henry Doulton, have hereunto set
my hand and seal, this Seventeenth day of January, in the year. of
our Lord One thousand eight hundred and seventy-one.