IMPROVEMENTS IN THE MANUFACTURE OF INDIA-RUBBER VALVES
Year: 1873

page_text: 5.
LETTERS PATENT to James Quin, of Leyland, near Preston, in the
County of Lancaster, for the Invention of "IMPROVEMENTS IN THE
MANUFACTURE OF INDIA-RUBBER VALVES."
Sealed the 5th August 1873, and dated the 17th February 1873.
PROVISIONAL SPECIFICAION left by the said James Quin, at the
Office of the Commissioners of Patents, with, his Petition, on the
17th February 1873.
I, JAMES QUIN, of Leyland, near Preston, in' the County of Lancaster,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
'IN THE Manufacture OF INDIA-RUBBER VALVES," to be as follows:-
This Invention relates to the manufacture of such india-rubber valves
as are made partly of soft rubber and partly of hard, such as circular or
segmental valves formed of soft rubber attached to a hard metal centro
or straight valves made of soft rubber attached to a hard rubber hinge
piece. The defect hitherto existing in valves of this description has been
that the valve in opening bends at the point where the two kinds of
rubber are united, and hence there was a tendency to break or separate
the two pieces at the joint, and it is to remedy this defect that my
Invention is designed..

page_text: The Invention consists principally in making the hard rubber centre
or hinge piece with a thin tongue or flange projecting from its outer
edge in or about the centre of its thickness, which tongue or flange is
let.into a groove in the inner edge of the soft rubber, and thus not only
strengthens the joint but prevents the valve from bending at the point of t
junction with the hard rubber, and thus obviates the liability of the two
parts to come asunder at this point.
Instead of making the tongue or flange of one piece with the hard
rubber it may be made of stout woven fabric or of wire gauze, or
perforated metal, or other suitable material firmly bedded into the hard 1
rubber during the process of manufacture.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Quin in. the Great Seal Patent Office on
the 15th August 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
QUIN, of Leyland, near Preston, in the County of Lancaster, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of February, in the
year of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said James Quin, Her special
license that I, the said James Quin, my executors, administrators,
and assigns, or such others as I, the said James Quin, my exe-
cutors, administrators, 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 "Im-
PROVEMENTS IN THE MANUFACTURE OF INDIA-RUBBER VALVES," upon the
condition (amongst others) that I, the said James Quin, my exccutors
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

page_text: 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 James Quin, 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 and accompanying Drawings (that is to say) :-
This Invention relates to the manufacture of such india-rubber valves
as are made partly of soft rubber and partly of hard, such as circular
or segmental valves formed of soft rubber attached to a hard ebonite
centre, or straight or other valves made of soft rubber attached to a hard
rubber hinge piece.
Such being the nature and object of my said Invention for "Im-
provements in the Manufacture of India-rubber Valves," I will now
proceed to describe in detail the manner in which the same is to
be or may be performed or carried into practical effect; and in order
that the same may be clearly understood I havo annexed hereunto a
Sheet of Drawings illustrative thereof, and have marked the same
with figures and letters of reference corresponding with those in the
following explanation thereof.
Fig. 1 in the annexed Drawing represents a face view, and Fig. 2 a
section of an ordinary segmental valve made of a piece of soft rubber
a, a, with a hard rubber or ebonite centre b, b. Tho defect hitherto
existing in valves of this description has been that the valve in opening
bends at the point *, *, where the two kinds of rubber are united, and
hence there has always been a tendency to break or separate the two
pieces at the joint, and it is to remedy this defect that my Invention is
designed.
The Invention consists principally in making the hard rubber centro
or hinge picce b, b, with a thin tongue or flange c, c, projecting from its
outer edge at about the centre of its thickness, as shown at Fig. 3. This
tongue or flange c, c, may be made of one piece with the part b, b, and
let into a groove in the inner edge of the soft rubber a, a, as shown at
Fig. 4, and it thus not only strengthens the joint, but prevents the valve
from bending at the point of junction with the hard rubber, and thus
obviates the liability of the two parts to come asundor at this point.

page_text: Instead of making the tongue or flange c, c, of one piece, with the
hard rubber centre piece b, b, it may be made of a separate piece, as
shown at Fig. 5. The hard rubber-centre and the soft rubber valve a, a,
being each made in two thicknesses, the piece c, c, is placed between
them and the whole pressed and united firmly together. Or the piece
.c, c, may be made of stout woven fabric, such as "duck," or of wire
gauze or perforated metal, or other suitable material firmly bedded into
the hard and the soft rubber during the process of manufacture in the
manner already described, and the duck or wire gauze may extend to
(or nearly to) the outer edge of the soft rubber if preferred.
Having now described the nature and object of my said Invention for
improvements in the manufacture of india-rubber valves," together
with the manner in which the same is to be or may be performed or
carried into practical effect, I would remark in conclusion that I am
-aware that soft rubber valves with hard rubber centres have been made,
and also that canvas and wire gauze have been used to strengthen the soft
rubber valves, but they have not been used in combination, I therefore
claim as my Invention, the insertion in soft rubber valves (made with a
hard rubber centro or hinge piece) of a central web or flange for the
purpose of strengthening the joint, substantially as herein-before parti-
cularly described, whether such web or flange is made in one piece with
the hard rubber centre, or inserted between the two thicknesses of tho
same in the process of manufacture.
In witness whereof, I, the said James Quin, have hereunto set
my hand and seal, this Thirteenth day of August, in the year of
our Lord One thousand eight hundred and seventy-three.