Improvements in and connected with the Valves of Pneumatic Tyres.
Year: 1893

page_text: Date of Application, 7th Sept., 1893
Complete Specification Left, 6th June, 1894-Accepted, 7th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in and connected with the Valves of Pneumatic
Tyres.
I, HARRY LAND, of Great Eastern House, Bishopsgate Street London, E.C.
Engineer, do hereby declare the nature of this invention to be as follows:-
:―
This invention relates to Improvements in, and connected with, the Valves of
Pneumatic Tyres, and has for object to so construct and arrange such valves and
their connections that whilst ensuring perfect action, they may be readily detached
from the tyre and taken to pieces for repairing and cleaning purposes. The same
are equally adaptable for use with either single or double tube tyres, and are
moreover inexpensive in manufacture, and of extreme simplicity in construction.
Hitherto much inconvenience and trouble have been experienced by reason of
the difficulty which obtains in removing the valve from the projecting nozzle of the
tyre to which it is attached, the custom being to affix the valve to said projecting
nozzle of the tyre by binding same around very tightly with wire or similar
material, which when once unwound can only be again properly secured with the
use of suitable tools or implements. To overcome this difficulty I, in accordance
with this invention, insert in the projecting nozzle of the tyre a brass or other
suitable metal liner, which I secure in position in the ordinary manner of binding
with wire as aforesaid. This liner I form on the inside with a screw thread into
which fits and screws the valve box proper. Hence when it is desired (say should
grit or other matter have become introduced into the valve and thereby prevent
same closing properly) to remove the valve for cleaning or other purposes the
operation is very much simplified it being only necessary to unscrew the valve box
from the screwed liner inserted in the tyre nozzle. Further in accordance with
this invention the action of the valve is rendered much more certain than that of
those now in use as in lieu of depending solely upon the back pressure of the air
within the tube to close the valve I introduce a spiral or other spring which tends
to hold the ball or other valve against its seating, and thereby ensure an air
tight closure of the valve. A convenient manner of accomplishing this is as
follows:-
In the barrel of the valve box I have a cup which holds the ball, and this cup I
form with an extending stem piece around which I place the spiral spring aforesaid
one end of same taking against the under side of the cup and the other resting upon
the perforated bottom of the valve box. I preferably for conveniently removing
the ball when occasion requires form the valve box with an open top over which
screw a suitably perforated cap to form the valve seat. This in its turn 1 screw
In operation
for the reception of a dust or dirt excluding cap when not in action.
I remove this latter cap and screw on the air pump which when injecting air will
force the valve from its seat and depress the cup and spring aforesaid sufficiently to
allow the inlet of air to the tyre tube. Upon the return stroke of the pump plunger
and the consequent removal of air pressure against the valve the spring before
referred to will raise the cup and with it the ball and instantly close the valve.
Dated this 5th day of September 1893.

page_text: Improvements in and connected with the Valves of Pneumatic
Tyres.
1, HARRY LAND, of Great Eastern House Bishopsgate Street, London, E.C.
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 Improvements in, and connected with the Valves of
Pneumatic Tyres, and has for object to so construct and arrange such valves and
their connections that, whilst ensuring perfect action, they may be readily detached
from the tyre and taken to pieces for repairing and cleaning purposes.
The same
are equally adaptable for use with either single or double tube tyres and are more-
over inexpensive in manufacture and of extreme simplicity in construction.
Hitherto much inconvenience and trouble have been experienced by reason of the
difficulty which obtains in removing the valve from the projecting nozzle of the tyre
to which it is attached, the custom in some instances being to affix the valve to said
projecting nozzle of the tyre by binding same around very tightly with wire or
similar material, which when once unwound can only be again properly secured
with the use of suitable tools or implements. To overcome this difficulty, I,
in accordance with my present invention insert in the projecting nozzle of the
tyre, a liner or bush of brass or other suitable material which I secure in position
in the ordinary manner as aforesaid of binding with wire. This liner or bush
has formed on the inside thereof a screw thread into which fits and is screwed,
the valve box proper of my improved valvular device. Hence, when it is desired,
(say should grit or other matter have become introduced into the valve and
thereby prevent same closing properly) to remove the valve for cleaning or other
purposes, the operation of removal is very much simplified, it being only necessary
to unscrew the valve box proper from the screwed liner or bush aforesaid inserted
in the tyre nozzle. Further, in accordance with this invention, the action of
the valve rendered much more certain than that of those now in use, as in
lieu of depending solely upon the back pressure of the air within the tube to
close the valve, I introduce below the spherical or other valve of my improved
device, a spiral or other spring which serves to hold the valve against its seating,
and thereby to ensure an air-tight closure of the valve orifice. A convenient
arrangement of parts and mode of procedure for accomplishing this air-tight closure
are as follows: In the barrel of the valve box I have a cup which holds an
ordinary spherical valve. This cup I form with an extending stem piece around
which I place the spring above referred to; one end of same taking against the
underside of the cup and the other resting upon the perforated bottom or cap of the
valve box. I preferably-to allow of the convenient removal, when required, of
the spherical valve-form the valve box with an open top over which I screw a
suitable perforated cap to form the valve seat. This in its turn is screw threaded
for the reception of a dust and dirt excluding cap when not in action. In the
operation of inflating the tyre tube I remove this latter cap and screw on the air
pump, which when injecting air will force the valve from its seat, and depress the
cup and spring aforesaid sufficiently to allow the inlet of air to the tyre tube.
Upon the return stroke of the pump plunger and the consequent removal of air
pressure against the valve, the spring before referred to will raise the cup and with
it the valve and instantly close the valve orifice.
In order that my invention may the better be understood I have appended the

page_text: accompanying sheet of drawings, referring to which, Figure 1 is a general elevational
view of the valvular device complete. The liner or screwed bush hereinbefore
referred to as being adapted to the inflating nozzle of the tyre is shown at Figure 5.
The valve box proper and within contained parts herein before enumerated are
shewn, respectively, in Figure 4. a being the valve box; 6 ball valve; c the cup
for reception of valve; d, spindle or stem of c; e the spring herein before referred
to as being introduced for holding the valve against the valve seating the latter
being shewn in Figure 3, wherein also is seen the screwed nipple g for attachment
to air pump. Said nipple when the tyre tube is not being inflated, being protected
as hereinbefore stated, by a dust and dirt excluding cap such for instance, as that
shewn at Figure 2.
I wish it to be understood that although I have herein before described and shewn
in the drawings, the valve ball and the cup and its stem or spindle as being in two
separate pieces or consisting of two separate members, said ball, cup and spindle
might comprise one member only and assume the forms shewn Figures 6 and 7.
Also I do not confine myself to the employment of metal solely (although this
might generally be found preferable) as the substance, of which said parts are to be
made; as any substance or material may be adopted therefor which may, in
practice, be found to be suitable or advantageous, whether I employ the first above
described separate arrangement of the parts of the ball valve, cup and spindle, or
the latter arrangement in which these two members are in one (Fig. 6). But, the
valve seating fin every and any case, to be of metal. Again, as a further modifica-
tion affecting the ball valve, cup and spindle, the valve itself instead of assuming
a spherical form, might be as shewn Figure 7 namely tapering or conoid at the part
where entering the valve seating. Also, the valve box or casing instead of being
as shewn Figure 4 might assume the formation illustrated at Figure 8. In connec-
tion with which I propose to adopt and employ a perforated cap as in Figure 3,
thus making up the valve device complete. In cases, however, where I may adopt
the arrangement shewn Figure 8, I do not propose perforating the bottom h with a
number of small air holes, but simply to provide one air passage or conduit.
Under the several modifications which I have described in connection with
my
said
improvements, I wish it to be understood that I purpose adopting a spiral or other
spring in conjunction with the valve spindle of my device, as, by the employment
thereof, the automatic closing of the valve is ensured and thereby is avoided the
necessity for depending upon the back pressure of air-as applies at present in the
cases, generally, of the types of the valvular devices hitherto adopted, or which
have been proposed, in connection with the inflation or deflation of cycle and other
vehicle tyres. Moreover, the improved valvular device according to my invention
distinguishes itself markedly over, and relatively to other contrivances of the same
class, by possessing the following amongst other advantageous features. That is
to say, ready access is ensured to every part of the hereinbefore described improved
device. The whole can readily be instantly taken to pieces to allow of the several
members or any of them being overhauled or examined, repaired and replaced,
where and when necessary and by any unskilled person. Further, in my improved
device the employment is rendered unnecessary of any perishable rubber or
other washers or pieces of connection tubing. Again, although for the purposes
of allowing easy access to the several parts of my improved device, I prefer to
make the whole in separate parts or pieces as hereinbefore described, yet as a
further modification within the limits of my invention I might construct the
valve seating and valve way in one piece as shewn in the drawing Figure 9,
instead of screwing a cap over, the valve seating if formed therein. My improved
device is designed and constructed to withstand exceptionally high pressures, far
exceeding those which can be employed in connection with any other type of
pneumatic tyre valve. The substantiality of its construction is such as to ensure
great durability and for a very lengthened time without necessitating renewal of
any of the parts of same, and is adaptable when either air, water, steam or gas are
used for the purpose of inflation.

page_text: Having now particularly described' and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improvements in and connected with valvular devices for the inflation
of tube. tyres of cycles and other tyred vehicles, substantially as herein set forth.
2. In connection with valvular devices such as those included in the preceding
claim, the employment of the screwed bush or liner Figure 5, bereinbefore
referred to and into which is screwed the valvular device proper complete
Figure 1, and accessory parts or members in conjunction therewith, all substan-
tially as and for the purposes herein set forth and shewn in the accompanying
drawings.
Dated this First day of June 1894
JAMES
STEVENSON,
1, Furnival Street, Holborn, E.C., Agent for Applicant.