Improvements in connection with Valves for Pneumatic Tyres and' similar purposes...
Year: 1894

page_text: Date of Application, 1st Oct., 1894
Complete Specification Left, 1st Aug., 1895-Accepted, 14th Sept., 1895
PROVISIONAL SPECIFICATION..
Improvements in connection with Valves for Pneumatic Tyres and'
similar purposes...
We, WILLIAM BOWN, 308 Summer Lane, Birmingham in the County of
Warwick, Manufacturer, GEORGE CAPEWELL 114 Upper Thomas. Street, Aston:
juxta Birmingham aforesaid, Machinist and HERBERT WILLIAM DENTON'
INGHAM, Slade Road, Erdington juxta Birmingham aforesaid, Mechanical
Draughtsman, do hereby declare the nature of this invention to be as follows:-
This invention has reference to valves for pneumatic tyres and similar purposes
the object of which is to form a non-return valve so that the rubber which forms
the non-return action is prevented from corroding and also from undue expansion,
and consists in forming a portion of the non-return action of the said valve out of
non-expansible rubber or a combination of rubber and canvas or rubber and silk.
or silk or other like material and the other or check portion of the said, valve out
of flexible or yielding rubber. Or the said valve may be formed so that the check
portion is constructed on the inner side. We may also if desired line the inetal
casing which contains the valve with any non-metalic substance so as to prevent
corrosion..
WILLIAM BOWN.
GEORGE CAPEWELL.
HERBERT WILLIAM DENTON INGHAM.
Improvements in connection with Valves for Pneumatic Tyres and
similar purposes:
We, WILLIAM BOWN, 308 Summer Lane Birmingham in the County of
Warwick, Manufacturer; GEORGE CAPEWELL, Upper Thomas' Street, Aston
juxta Birmingham aforesaid Machinist and HERBERT WILLIAM DENTON
INGHAM, Arthur Villas, Slade Road, Erdington juxta Birmingham aforesaid,
Mechanical Draughtsman, 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 has reference to valves for pneumatic tyres and like purposes the
object of which is to construct a non-return valve so that the rubber which forms
the non-return action is prevented from corroding and' also from undue expansion.
In order that our invention may be clearly understood we have illustrated the
same on the accompanying sheet of drawings.
Fig., 1 is:sectional elevation, of a valve constructed' according to our invention.
A is the usual outer metalicase the head of which is fitted into the air chamber of
a pneumatic tyre: Inside the said case A is the non-return portion of the valve'
which consists of a piece of non-flexible rubber tubing a or equivalent secured" to "

page_text: the piece of metal tubing B which screws into the metal seating C. Placed over
the top of the non-flexible tubing a is a piece of flexible rubber tubing b which
prevents the air from escaping out of the tyre. When pumping air through the
valve into the tyre it passes down the opening in the seating C into the non-
flexible tubing a then through the hole c formed in the said non-flexible tubing a,
forcing the flexible tubing. & open thus admitting the air into the air chamber.
Immediately the inward force of air ceases the flexible tubing & resumes its normal
position thereby forming an absolute check valve.
Fig. 2 is a similar view to Fig. 1 shewing another method of constructing a valve
according to our invention. In this case the non-return portion of the valve consists
of a piece of metal tubing dover which is fitted a piece of non-flexible rubber
tubing e, and placed over the bottom end of the said non-flexible rubber tubing e'is
a piece of flexible rubber tubing which forms the check portion of the valve.
The said metal tubing d and non-flexible rubber tubing e are held in position by
means of the metal seating C which beds onto a rubber or other suitable washer g.
The metal washer which rests upon the shoulder i formed in the interior of the
valve casing A is provided for the said rubber washer g to bear upon.
is forced through the said valve it passes through the opening in the seating C,
down the metal tubing d and through the openings provided in the said metal
tubing d and non-flexible rubber tubing e forcing the flexible rubber tubing open
thus admitting the air into the air chamber of the tyre. The said flexible rubber
tubing assumes its normal position immediately the inward force of air ceases thus
forming an absolute check valve. The cap E is employed for holding the seating C
in its proper position.
When air
At Fig. 3 we have shewn a sectional elevation of another method of constructing
a valve according to the principle of our invention. The non-return portion of the
valve is formed out of a piece of flexible rubber tubing k fitted inside a piece of
non-flexible rubber tubing or rice versa. Fitted to or formed out of the said
non-flexible tubing is a rubber washer m or equivalent which bears upon the valve
casing A. The cap or cover D which screws onto the casing A is provided
internally with a shoulder n or equivalent for bearing upon the washer m thereby
forming a perfectly air tight joint. In order to force air through the said valve
the inflater is screwed to the neck o of the cap D, the said air passing down the
interior of the said cap D, through the opening p provided in the nou-flexible
tubing, then forcing the flexible tubing kopen so as to allow the air to pass
between the exterior of the said flexible tubing and the interior of the said non-
Hexible tubing into the air chamber of the tyre. Immediately the inward pressure
of air ceases the flexible tubing k assumes its normal position thereby forming a
perfect check valve.
Fig. 4 shews another method of constructing the check portion of a valve and
consists of a piece of non-flexible rubber tubing u with one end v formed flexible
and provided with a suitable number of holes which open when air is forced through
the valve thus adimitting the said air into the tyre. When the inward force of air
ceases the said holes close thereby forming a check valve. The method shewn
at Fig. 5 is similar to Fig. 4 excepting that the flexible portion of the rubber tubing
is placed between the non-flexible rubber tubing.
T
T
Fig..6 shews another method of constructing the check portion of a valve and
consists of a piece of flexible rubber tubing placed inside a piece of non-flexible
rubber tubing s.
The air in passing down the flexible tubing r expands it and
opens the holes provided in the said flexible tubing r, the air then passes through
the holes provided in the non-flexible tubings into the air chamber. When
the inward force of air ceases the flexible tubing r assumes its normal position'
thus forming a perfect check valve.
We may if desired line the metal casing (which contains the check portion of
the valve) or any other metallic portion of the suid valve with any suitable non-
metallic substance so as to prevent corrosion or deterioration of any of the rubber
parts.

page_text: Having now particularly described and ascertained the nature of our said' inven-
tion and in what manner the same is to be performed we would have it understood
that we do not confine ourselves to the precise details as herein shewn and
described as they may be varied without departing from the nature of our said
invention, but what we wish to claim is :-
Firstly. Forming the check or non-return portion of a valve for pneumatic tyres
and the like purpose out of a combination of flexible and non-flexible rubber tubing
or its equivalent in the manner and for the purpose substantially as herein shewn
and described with reference to Figs. 1, 2 and 3.
Secondly. Forming a check or non-return valve for pneumatic tyres and the like
purpose in the manner and for the purpose substantially as herein shewn and
described with reference to Fig. 3.
Thirdly. Forming the check or non-return portion of a valve for pneumatic tyres
and the like purpose in the manuer substantially as herein shewn and described
with reference to Figs. 4, 5 and 6.
1
Fourthly. Lining the metal casing or any other metallic portion of a valve for
pneumatic tyres and the like purpose with any suitable non-metallic substance for
the purpose substantially as herein described.
Dated this 21st do of Jul 1905
WILLIAM BOWN.
GEORGE CAPEWELL.
HERBERT WILLIAM DENTON INGHAM.