Year: 1897

page_text: Date of Application, 9th July, 1897
Complete Specification Left, 9th Apr., 1898-Accepted, 28th May, 1898
CHARLES HENRY ROSHER, 215, Mansion House Chambers, London, E.C., Civil
and Consulting Engineer, do hereby declare the nature of this invention to be as
follows:-
My improved valve for pneumatic tyres and the like consists of
(a) An internally cylindrical hollow body having at one end an internal flange
out of which is formed a seat for the valve and a guide for the valve stem (herein-
after mentioned).
(b) A cylindrical hollow sleeve internally flanged at one end to form a shoulder
or bearing for the spring hereinafter mentioned; which sleeve is arranged to screw
into the body aforesaid.
(c) A valve which is externally seated at the end of the body and which is
attached to and guided by a valve stem, which works concentrically within the
sleeve and body aforesaid.
.
The valve stem is preferably triangular in section and is enlarged so as to form
a shoulder at the end opposite to that to which the valve is attached.
(d) A spiral spring surrounding the valve stem and confined within the sleeve,
bearing at one end against the internal flange thereof and at the other, against the
enlargement or shoulder on the valve stem.
The valve body is externally screwed at one end for the purpose of attachment
to the connector on the pneumatic tyre or its equivalent and may be screwed at
the other end to receive the inflator, or a dust cap.
By adjusting the position of the sleeve within the body the spring can be com-
pressed, relieved or entirely released. In compression it holds the valve firmly to
its seat; by relieving its pressure the valve may be rendered so free as to open in
response to the pressure of air created at each forward stroke of the inflator, yet
closing on the return stroke, independently of the pressure within the tyre, and by
entirely releasing the spring, the valve and stem can be left free to act.
The tyre can be deflated by pressing the valve stem inwards thus raising the
valve from its seat, or by detaching the valve body from the connector.
In an alternative arrangement the liner or sleeve instead of screwing into the
valve body, is made to fit easily within the latter. It is also made somewhat shorter
in proportion to the valve body than in the first case and an additional spiril spring
surrounding the valve stem is introduced between the internal flange of the valve
body and the internally flanged end of the liner.
In the case of this arrangement the act of attaching the inflator is utilised to
press the liner inwards into the valve body, thus compressing the spring aforesaid
and at the same time relieving or releasing the spiral spring within the liner itself
yet leaving it sufficient power to hold the valve to its seat.
In another alternative arrangement, I entirely dispense with springs, and in this
case the shoulder on the valve stem engages with the internal Hange of the

page_text: sleeve which screws into the body as in the first case and either holds the valve to
its seat or leaves it free to act.
Improved Valve for Pneumatic Tyres and the like.
I, CHARLES HENRY ROSHER, of 215, Mansion House Chambers, London, Civil
Engineer, 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 an improved type or construction of valve-applianco
for retaining fluids or liquids in pneumatic tyres for wheels or other articles, which
are required to contain gases or liquids under pressure, such gases or liquids being
forced into the articles requiring inflation by means of a force pump or other means
as is well known.
This invention will be readily understood by means of the following description
and drawings annexed hereto in which :-
Figure 1 shows a valve with its seating in section as it would appear when closed,
provided with dust cap.
Figure 2 is a section of the same type of valve with portions thereof shown in
another position. A nozzle of an inflating instrument being attached thereto.
Figure 3 is a cross section on line x, x Figure 1.
Figure 4 shows a valve of a modified form in section.
Figure 5 shows
position.
a similar valve with portion thereof shown in another
Figure 6 is a cross section on line y, y Figure 5.
Figures 7, 8 and 9 show in section and plan respectively a simpler form of
valve.
Like letters of reference refer to like parts in all the figures.
Referring to Figures 1, 2 and 3 the casing forming the valve body is formed in
one piece its outer periphery being screw threaded at each end, the lower portion for
attachment to a socket which is secured to a pneumatic tyre or the like and the
upper portion for the purpose of securing either a dust cap or inflating instrument.
The body a at its lower end is inwardly flanged at a¹ to form a seating and guide
for the valve b. The interior of body a is partly screw threaded, with this portion
a hollow sleeve c engages, this has an internal flange c' to form a bearing for the
spring d. The valve stem is provided with a projection 62 at its upper end
against which the spring d abuts. The tension of the spring d can be altered by
altering the position of the sleeve c the object being to make the valve more or less
free so that in forcing air only sufficient tension is put upon the spring to cause the
valve to return to its closed position, for instance if a vessel were about to be
charged with a comparatively low pressure the spring would be adjusted so that a
moderately high tension would be maintained thereon and vice-versa.
Referring to Figures 4, 5 and 6 an alternative arrangement is shown in this case
the hollow sleeve cinstead of screwing into the valve body a is made to fit easily
therein. An additional spring d' is employed in this type of valve, which is placed.
between the flanged portion of the body a and sleeve c. By this arrangement the
act of attaching the inflator is utilised to press the sleeve c inwards into the valve
body a thus compressing the spring d¹ and at the same time relieving the spring d
yet leaving sufficient power to hold the valve 6 to its seat.

page_text: Figures 7, 8 and 9 show another alternative arrangement in which springs
are entirely dispensed with. In this case the projection 62 on the valve spindle b¹
engages with the flange c¹ on hollow sleeve c. The valve b is shown closed in
Figure 7 and open in Figure 8, the two positions being obtained by screwing the
sleeve c outwards or inwards respectively. In this type of valve the non-return of
the inflating gases is caused by the elastic action of the medium causing the valve
to be held upon its seat when the pressure from the inflating instrument is stopped,
and when the tyre or other article is sufficiently charged with pressure the sleeve c
is operated to close the valve upon its seat.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
=
1. A valve for retaining fluids or liquids consisting of a hollow body formed at
one end with an inwardly flanged part, forming a valve seating, combined with a
sleeve adjustable within such body by means of a screw, so that the tension upon a
spring and pressure upon a valve may be varied as and for the purpose substantially
as herein described and illustrated.
2. A valve for retaining fluids or liquids consisting of a hollow body formed at
one end with an inwardly flanged part, forming a valve seating combined with a
loose sleeve which is operated by means of attaching an inflator, combined springs
which are respectively compressed and elongated by such action, substantially as
and for the purpose herein described and illustrated.
3. A valve for retaining fluids and liquids consisting of a hollow body formed at
one end with an inwardly flanged part forming a valve seating, combined with a
screwed sleeve adjustable within such body for opening and closing a free valve
substantially as and for the purpose herein described and illustrated.
Dated this 6th day of April 1898
G. CECIL JONES,
Agent for the Applicant.