IMPROVEMENTS IN THE MANU- FACTURE OF FLEXIBLE VALVES.
Year: 1862

page_text: ‹LETTERS PATENT to Joseph Henry Tuck, of No. 35, Cannon Street, in
the City of London, for the Invention of "IMPROVEMENTS IN THE MANU-
FACTURE OF FLEXIBLE VALVES.".
Sealed the 19th September 1862, and dated the. 22nd March 1862.
1
PROVISIONAL SPECIFICATION left by the said Joseph Henry Tuck at the
Office of the Commissioners of Patents, with his Petition, on the 22nd
March 1862.
I, JOSEPH HENRY TUCK, of No. 35, Cannon Street, in the City of London,
do hereby declare the nature of the Invention for "IMPROVEMENT'S IN THE
MANUFACTURE OF FLEXIBLE VALVES," to be as follows:-
This Invention has for its object improvements in the manufacture of flexible
valves. For these purposes it is preferred that the valves should be made of
vulcanized india-rubber, but other materials may be used therewith, or in place
thereof, as has heretofore been the case when manufacturing flexible valves."
In constructing a circular or other form of valve, where the same is held by
a spindle passing through it a ring of metal or of other strong material is
introduced into the interior or substance of the valve around and concentric
with the hole through which the spindle passes. In some cases, near the outer
circumference of the valve, and at a distance from the ring above mentioned,

page_text: another ring of metal or of other suitably strong material is introduced into
the substance of the valve, which ring may, when desired, be itself flexible by
being formed of links or parts connected together, if of metal or other hard
material, or the ring may be of flexible material and in one piece. In making
a valve of india-rubber or india-rubber compounds, or of gutta percha or its
compounds, the proper substance or thickness is obtained by cementing or
combining-two or more thicknesses together, and the rings above-mentioned
are laid in between two parts, so that when such parts are combined together
the rings will be included within the substance of the valve. To produce a
valve of vulcanized india-rubber or gutta percha, or compounds of those
materials, the valves are first to be made of suitable compound by cementing
or combining the parts together, and the vulcanizing process is then performed.
In some cases, in order to prevent flexible valves from spreading or extending
in diameter, the rings of the valve are connected at intervals by radial pieces
of metal or other material which are in like manner to the rings introduced
into the interior of the substance of the valve. When flexible valves are to
be fixed at one edge, then a rod or bar of metal, or of other suitably strong
material is introduced near the edge where the valve is fixed and where desired,
also near the outer edge and sides of the valves. It should be stated, that
heretofore, in some cases,"
Sunexible valves have been made of the materials above
mentioned, with woven fabrics applied at their outer surfaces, and in other
cases within the substance of the valve. The Invention above described is
applicable when making flexible. valves, whether woven fabrics are used. in
their construction or not. In some cases the strengthening rings or bars are
introduced into the interior of the valves after they have been vulcanized.
When it is desired to prevent flexible valves made of materials such as are
above mentioned from extending where interior rings or bars are not used,
then in place of introducing such strong rings around the holes through which
the spindles pass, and also in place of introducing bars or rods at the edges of
flexible valves where they are held at or near their edges, such parts of the
valves are made with indents or recesses on their outer surfaces to receive rings,
rods, bars, or ridges, or the valves are formed with projections on such parts in
order that the projections may enter recesses in the parts to which the valves
are fixed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Henry Tuck in the Great Seal Patent Office on the
22nd September 1862.
r
+
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
HENRY TUCK, of No. 35, Cannon Street, in the City of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-second day of March, in the year of our
Lord One thousand eight hundred and sixty-two, in the twenty-fifth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Joseph Henry Tuck, Her. special licence that I, the said Joseph
Henry Tuck, my executors, administrators, and assigns, or such others as I,
the said Joseph Henry Tuck, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all times there-
after 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 "IMPROVE-
MENTS IN THE MANUFACTURE OF FLEXIBLE VALVES," upon the condition (amongst
others) that I, the said Joseph Henry Tuck, 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 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 Joseph Henry Tuck, do. hereby declare
the nature of the said Invention, and in what manner. the same is to be per-
formed, to be particularly described and ascertained in and by the following.
statement thereof, that is to say:
This Invention has for its object improvements in the manufacture of flexible
valves. For these purposes it is preferred that the valves should be made of
vulcanized india-rubber, but other materials may be used therewith, or in
place thereof, as has heretofore been the case when manufacturing flexible
valves.
In constructing a circular or other form of valve, where the same is held by
a spindle passing through it a ring of metal or of other strong material is
introduced into the interior or substance of the valve around and concentric
with the hole through which the spindle passes. The object of such rings
being to give additional strength to the central parts of the valve, and that the

page_text: play or movement of the valves may be for the most part external of such
strengthening rings. In some cases, near the outer circumference of the valve,
and at a distance from the ring above mentioned, another ring of metal or of
other suitably strong material is introduced into the substance of the valve,
which ring may, when desired, be itself flexible by being formed of links
or parts connected together, if of metal or other hard material. Or the ring
may be of flexible material, and in one piece. In making a valve of. india-
rubber or india-rubber compounds, or of gutta percha or its compounds, the
proper substance or thickness is usually obtained by cementing or combining
two or more thicknesses together, and the rings above mentioned are laid in
between two parts, so that when such parts are combined together the rings
will be included within the substance of the valve. To produce a valve of
vulcanized india-rubber or gutta percha, or compounds of these materials, the
valves are first to be made of suitable compounds, as are well understood,
consisting of india-rubber and sulphur, or gutta percha and sulphur, or of
india-rubber, gutta percha, and sulphur, by cementing or combining the parts
of which each valve is to consist together, and the vulcanized process is then
performed. In some cases, in order to prevent flexible valves from spreading.
or extending in diameter, the rings of the valve are connected at intervals by.
radial pieces of metal or other material, which are in like manner to the rings
introduced into the interior of the substance of the valve; these radial ties
should be flexible, in order not to interfere with the bending of the valve..
When flexible valves are to be fixed at one edge, then a rod or bar of metal or
of other suitably strong material is introduced near the edge where the valve
is fixed, and where desired; also near the outer edge and sides of the valve.
It should be stated that heretofore in some cases flexible valves have been
made of the materials above mentioned, with woven fabrics applied at their
outer surfaces, and in other cases within the substance of the valves. The
Invention above described is applicable when making flexible valves, whether
woven fabrics are used in their construction or not, the strengthening rings or.
bars being applied in addition to the woven fabrics, in some cases the strength-
ening. rings or bars are introduced into the interior of the valves after they
have been vulcanized.
When it is desired to prevent flexible valves made of materials such as are
above mentioned from extending where interior rings or bars are not used, then
in place of introducing such strong rings around the holes through which the
spindles pass, and also in place of introducing bars or rods at the edges of.
flexible valves, where they are held at or near their edges, such parts of the

page_text: valves are made with indents or recesses on their outer surfaces to receive
rings, rods, bars, or ridges, or the valves are formed with projections on such
parts, in order that the projections may enter recesses in the parts to which
the valves are fixed.
2
2'
In witness whereof, I, the said Joseph Henry Tuck, have hereunto set
my hand and seal, this Nineteenth day of September, in the year of
our Lord One thousand eight hundred and sixty-two.
11-