Improvements in Valves for Pneumatic Tyres.
Year: 1895

page_text: Date of Application, 18th July, 1895
Complete Specification Left, 18th Apr., 1896-Accepted, 23rd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres.
We, HENRY KESTERTON, of 16 Grosvenor Road, Coventry in the County of
Warwick, Engineer, and WILLIAM ALLMAN, of 45 Villa Road, Handsworth, in
the County of Stafford, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in valves for pneumatic tyres for cycle
and other vehicle wheels, our object being to construct an effective valve of few and
simple parts, very readily produced and put together.
In carrying our invention into effect we construct the body of the valve from
brass or other metal, forming a head or flange for insertion within the tyre, and a
screwed stem for the reception of the external washer and securing nuts. The
outer extremity of the valve body we turn down, and screw for the reception
of the inflator tube and of the cap to which is attached a circular or conical
pointed valve in the manner hereinafter described. We drill a hole right through
the valve body for the admission of the compressed air, and at the inner end we fix
an ordinary non-return valve opening inwards to the tyre, the lift of the valve
being controlled by a thin beading, formed on the head or flange, which we turn
over after the valve is placed in position.
The cap for closing the outer end of the valve body has a screwed stem
formed with it, or rigidly attached by brazing or otherwise, arranged for screwing
into the valve body on to a conical seating formed therein at the end of the
internally screw threaded portion, the extremity of the stem being formed to a
circular or conical point in order that an air tight metal to metal joint may be
readily made by screwing the stem on to its seating, thus effectually preventing
the escape of the compressed air from the tyre. In this manner we arrange the cap
to form a protecting cover for the outer end of the valve body when the inflator
cube is detached and also a valve for hermetically sealing the passage through the
body.
We do not limit the application of our invention to any one form or shape
of our improved valve but make such modifications as may be desired for varying
equirements.
Deted thin 17th 1

page_text: .
the County of Stafford, Manufacturer, 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 :-
This invention relates to improvements in valves for pneumatic tyres for cycle
and other vehicle wheels, our object being to construct an effective valve of few and
simple parts very readily produced and put together.
In the accompanying sheet of explanatory drawings to be hereinafter referred
to ;-
Figure 1 is a front elevation of the complete valve, and Figure 2 a plan of the
head or flange of the same.
Figure 3 is a sectional elevation of the valve body and Figure 4 a similar view of
the cap with the valve plug formed therewith.
Figure 5 is a sectional elevation of the complete valve.
The same reference letters in the different views indicate the same parts.
In carrying our invention into effect; we construct the stem or body A of the
valve from brass or other metal, forming a head or flange A' at one end for insertion
within the tyre.
We cut or form a screw thread along the body A for the reception
of the ordinary washer plate B and securing nuts C and C¹. The outer
extremity A² of the valve body we turn down and screw for the reception of the
ordinary inflator tube when the tyre is to be inflated, and also of the closing or
protecting cap D with which is formed a circular, conical pointed valve plug D₁ in
the manner hereinafter described. We drill a hole right through the valve body
for the conveyance of the compressed air, and at the inner end we insert a metallic
non-return valve E opening inwards to the tyre and having a guiding stalk as
illustrated. The lift of the valve E is controlled by a thin beading formed on the
head or flange of the valve body which we spin or turn over after the valve is
placed in position, or by small snugs or projections as a Figure 2 which we force
over by means of a small chisel or like tool from the head or flange.
The cap D for closing the outer end of the valve body has a screwed stem or
plug D formed with it, or rigidly attached by brazing or otherwise, arranged for
screwing into the valve body on to a conical seating formed therein at the end of
the internally screw threaded portion as illustrated at Figure 5, the extremity of
the plug being formed to a circular conical configuration. An air tight metal to
metal joint is readily made by screwing the plug on to its seating, thus effectually
preventing the escape of the compressed air from the tyre. In this manner we
arrange the cap to form a protecting cover for the outer end of the valve body
when the inflator tube is detached, and also a valve for hermetically sealing the
passage through the body.
When the tyre is to be inflated the cap D is removed and the pump or inflator
connecting tube is screwed on to the end A of the valve body. The air forced in by
the pump or inflator escapes freely past the back pressure or non-return valve Ė
into the tyre. After inflation to the required degree of pressure the connecting
tube is removed and the cap D screwed into the valve body, the escape of air being
meanwhile prevented by the valve E. On screwing the valve plug D' on to its
seating the valve E is raised as illustrated at Figure 5, and the compressed air is
then prevented from escaping by the valve D'.
To deflate the tyre when necessary for repairing or other purposes, the valve
cap D is slightly unscrewed, thus withdrawing the valve plug D₁ from its scating
to a sufficient extent to permit of the escape of air. A small flat or groove such
as d Figure 4 is formed along the screwed plug to provide a free exit for the
escaping air, during deflation.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improved valve for pneumatic tyres consisting of a hollow stem or body
having a back pressure or non-return valve at one end, and a conical seating at the

page_text: opposite end for the reception of a valve plug having a circular conical extremity
substantially as described.
2. In valves for preumatic tyres the use of a circular conical valve plug substan--
tially as and for the purposes herein described.
3. In valves for pneumatic tyres the combination of a cap or cover with a screwed
valve plug having a circular conical extremity substantially as and for the purposes
herein described.
4. The improved construction and arrangement of a valve for pneumatic tyres
substantially as hereinbefore described and as illustrated in the accompanying:
drawings.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicants..