Improvements relating to Valves for Pneumatic Tyres and the like.
Year: 1897

page_text: Date of Application, 1st June, 1897
Complete Specification Left, 1st Mar, 1898-Accepted, 9th Apr., 1898
PROVISIONAL SPECIFICATION.
Improvements relating to Valves for Pneumatic Tyres and the like.
I, THOMAS GUTHRIE, Decorator, of 3, Thorney Terrace, South Shields, in the
County of Durham, do hereby declare the nature of this invention to be an
follows:-
My invention has reference to valves for pneumatic tyres and other inflatable
articles and has for its object to provide a valve of simple but adequate construo
tion and means whereby it may be efficiently secured to the inflatable chamber
or air tube.
According to my improvements, I employ a tubular and externally screwed
casing which is connected to the air receptacle and rim or other base and arranged
to be closed at its free end by an internally screwed sleeve or nut formed as usual
for the reception of the inflator and dust cap and adapted to enclose a stop valve
and a non-return valve.
The stop valve consists of a tubular body threaded to screw into the sleeve, the
amount of its insertion being determined by an annular flange or projection therein.
Each extremity of this body is reduced in diameter and provided with channels
communicating with the main passage therethrough and on the resulting shouldered
parts I fit washers or rings of leather, rubber or other like material, so that when
the parts are assembled in their proper positions and screwed up, one washer abuts
against the end of the casing connected to the inflation chamber while the other
washer abuts against the projection in the sleeve thus maintaining the pressure
with the aid of the non-return valve which is in the form of a disc of rubber or
other impervious material and is located in a chamber or cavity bounded laterally
by the said flange or projection and the controlled passage leading to the inflator.
By the above disposition of parts, when the inflator is applied, the receptacle can be
distended, the air escaping past the non-return valve into the channels of, and
through, the stop valve, but its return is effectually prevented by the disc finding
its seat on the end of the passage connecting with the inflator. When deflation
is required the sleeve is given a partial or whole turn thus easing the washer off the
end of the aforesaid casing and permitting escupe past the screw threads or through
a hole or holes cut in the sleeve therefor.
For securing the valve to the air tube or other container, according to my inven-
tion, I form on the valve casing a nipple adapted to be inserted and secured in a
short rubber or like flexible tube entering the interior of the receptacle while to
the exterior thereof I solution or otherwise fix a flange forming a part of the
short tube and back with canvas if desired.
By these means strength and perfect tightness result and to fasten the whole to
the rim or other foundation, I fix on the casing a coned or other suitably shaped
ledge or abutment to fit into a corresponding recess in the rim and be locked in
position by a nut.
A valve constructed and attached as herein described possesses advantages not
obtainable by those at present in use but of course my mode of securing may be

page_text: adopted in other types of valves while conversely my valve may be secured in any
other well known way.
Improvements relating to Valves for Pneumatic Tyres and the like.
I, THOMAS GUTHRIE, Decorator, of 3, Thorney Terrace, South Shields, in the
County of Durham, 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: –
My invention has reference to valves for pneumatic tyres and other inflatable
articles and has for its object to provide a valve of simple but adequate construc-
tion and means whereby it may be efficiently secured to the inflatable chamber
or air tube.
According to the first part of my improvements, I employ a tubular and exter-
nally screwed casing connected to the air tube or receptacle and rim or other base,
an internally screwed sleeve or nut formed for the reception of the inflator and a
dust cap, a tubular transversely channelled or perforated stop valve and a flexible
vibrating non-return valve, all arranged and combined in such manner that, in
their normal positions, the pressure within the inflatable chamber is maintained,
but when the inflator is applied to distend the receptacle the air enters thereinto
past the non-return valve and through the stop valve, its return beiug effectually
prevented by the former, while for deflation the contained air escapes on unscrew-
ing the sleeve.
My improved securing means consist in forming on the valve casing a nipple
adapted to be inserted and fastened in a short flexible tube entering the interior
of the receptacle and fixed to the exterior thereof by a flange forming part of the
Baid tube.
My improvements are generally applicable to inflatable articles but I have
specially devised them for pneumatic tyres and I represent such use in the accom-
panying drawings in reference to which, by way of example, I will now fully
describe my invention.
Fig. 1 is a vertical section showing the complete valve and mode of attachment
and Fig. 2 is a horizontal section of same on the line X-X. Fig. 3 is a similar
view to Fig. 1 of a modified valve construction, and Fig. 4 is a horizontal section
on the line Y-Y in each.
The same reference numerals designate like parts in all the figures.
1 is a tubular externally screwed casing opening into the air tube 2 (which is
only partially illustrated) and it is connected thereto and to the rim 3 as herein-
after explained. 4 is a sleeve or nut internally threaded to fit on the free end of
the casing 1 for opening and closing it. 5 is a hole or outlet (or there may be more
than one) in the sleeve 4 at the end of which a nozzle 6 is formed to receive, as
usual, the inflator when inflating, and when not, a dust cap 7. 8 is a stop valve
consisting of a short body having a longitudinal passage 9 and transverse passages
or perforations 10, 10. 11 is a non-return valve in the form of a disc of rubber
or other impervious material.
I illustrate two arrangements of these stop and non-return valves; in that shown
in Figs. 1 and 2 the stop valve 8 is externally threaded so that it may be screwed
into or out of the sleeve 4, the amount of its insertion being determined by an

page_text: annular flange or projection 12 therein. Each extremity of the valve 8 is reduced
in diameter for a short distance whereat I make in the face, as will be best seen
in Fig. 2, the transverse passages 10, 10 in the form of channels communicating
with the longitudinal passage 9 through the valve 8 and with the space 13 inter-
vening between the reduced portion thereof and the interior of the sleeve 4. I
show these channels 10, 10 at both ends of the valve 8, though for proper work-
ing, only those adjacent to the valve 11 are essential, but I prefer them also at
the extremity remote therefrom as they are convenient for effecting the insertion
and withdrawal of the valve 8, while too they admit of the reversal of the valve 8
which is advantageous should either of the washers 14, 15 (arranged as described
below) become defective.
On the shoulders of the valve 8 that result from its reduction I fit washers or
rings 14, 15 of leather, rubber or other suitable material so that when the parts
are assembled in their normal positions as represented in Fig. 1 and screwed
tight, the washer 14 abuts against the end of the casing 1 while the washer 15
abuts on the projection 12 in the sleeve 4 thus maintaining the pressure within the
tube 2 with the assistance of the non-return valve.
This valve 11 is located and vibrates in a chamber or cavity 16 bounded laterally
by the flange 12 with washer 15 abutting thereon and the end of the sleeve 4 about
the passage
17 in the nozzle 6 controlled by the suid valve and circumferentially
by the inner surface of the sleeve 4.
Referring now to the construction shown in Fig. 3, which, as will be at once
seen, is only a reversal of that just described. Here, instead of locating the
valves 8 and 11 in the sleeve 4, I arrange them in the end of the casing 1 fitting
thereinto. The stop valve 8 is, as compared with that shown in Fig. 1, somewhat
differently constructed and fitted; it is not screwed into the casing 1 but is made
a force-fit therein and has only one extremity reduced in diameter in which I
make the transverse passages 10, 10 in the shape of holes or perforations communi-
cating, however, in the same manner as the aforementioned facial channels.
The non-return valves 11 is of the same type as before while the chamber 16
in which it is contained and operates is, in this instance, constituted by the end of
the valve 8, an internal ring or flunge 18 at the end of the casing 1 and the inner
surface of the latter. This ring 18 is not essential as the adjacent end of the
sleeve 4 would serve the same purpose, but I recommend it because it prevents the
loss of the valve 11 in the event of the removal of the sleeve 4. As will be obvious
no,washers 14, 15 are necessary on the stop valve 8, but one, 19, of the same
material is fixed in the interior of the sleeve 4 so that it may abut tightly against
the end of the casing 1 to prevent leakage when the valve is in the closed position
as exemplified by Fig. 3. In this construction I prefer to prolong the nozzle 6
into the sleeve 4 for a short distance as illustrated and fit the washer 19 around
same as such extension ensures the effective action of the valve 11.
I have described, in one case, the passages 10, 10 as facial channels, and in the
other, as circunferential holes, but they may be the same in both, that is to say,
instead of making them in the extremity of the valve 8 as in Fig. 1, they may be
formed in the circumference of the reduced portion as in Fig. 3, while in the
latter figure the holes may be substituted by channels in the face as
Fig. 1.
Also I have explained the fixing of the valve 8 by screwing in Fig. 1 and by tight
fitting in Fig. 3, but it will be obvious that the latter method may be applied in
the former and vice versa.
Having now described the construction of my improved valve I will now explain
its practical operation.
Assuming it is required to inflate the air tube 2, the cap 7 is removed from the
nozzle 6 on which the inflator next is screwed as ordinarily. Then on pumping,
the air enters the passage 17 and impels the valve 11 against the inlet ond of the
passage 9 in the valve 8 thereby closing it. The air is now contained in the
space 13 and chamber 16 whence, by means of the passages 10, 10, it escapes into
the passage 9 and consequently through the casing 1 into the tube 2, its return,

page_text: however, being effectually prevented by the disc 11 which is forced, by the back
pressure, onto the delivery end of the passage 17 so closing same until the next
delivery stroke of the inflator when the same cycle of operations ensue until the
required tautness of the tyre is reached whereupon the inflator is detached and
replaced by the cap 7. Thus the tyre is ready for use, the parts being in the
positions shown in Figs. 1 and 3, from which it will be evident that the air can-
not possibly escape, since the washers 14, 15 and 19 respectively obviate any
tendency to leak at the junction of the casing 1 and sleeve 4, the valve 11 accom-
plishing the same in regard to the passage 17 with the aid of the usual washer in
the end of the cap 7.
By making the non-return valve 11 of flexible material it is enabled to adapt
itself to the surfaces about the passages 9 and 17 to positively close them, but of
course not the channels 10, 10 in Fig. 1 which are of sufficient depth to prohibit
choking by it during inflation.
When deflation is desired the sleeve 4 is turned to unscrew it, thereby with-
drawing the washer 14, Fig. 1, or the washer 19, Fig. 3, off the end of the casing 1
hence permitting exit past the screw threads and out at the open end of the sleeve 4,
but most of the air will, and is intended to, escape through the hole 5 which is
specially provided for the purpose. On the necessary collapse obtaining, the
sleeve 4 is returned to its original position ready for the succeeding inflation.
From the foregoing it will be evident that for blowing up the tyre all that is
necessary is to displace the cap 7 while an unscrewing of the sleeve 4 admits of
deflation, the two operations, therefore, being accomplished very simply but at
the same time quito sufficiently.
In practice I find both constructions equally effective, but I prefer that first
herein described since I am enabled to make the casing 1 of very small diameter
whereas the other necessitates a slightly larger one. Further, in the latter, the
valve 11, due to its location, is apt to be blown out of its chamber 16 should the
sleeve 4 be unduly screwed for deflation, an occurrence absolutely impossible in
the arrangement illustrated in Fig. 1.
I will now describe my improved securing means which are illustrated as applied
to the type of pneumatic tyre described in the Specification of my Patent No. 15669
A.D. 1896, though of course it will be understood that they may be applied to
other forms.
20 is a nipple formed or fixed at the end of the casing 1 and it is inserted and
secured in a short rubber or like tube 21 by binding wire or cord or by the natural
elasticity of the tube. This tube 21 is of such a length as to enter into the interior
of the tube 2 to which it is in turn fixed by an integral flange 22 solutioned or
otherwise fastened to the exterior thereof and backed with canvas for strength if
deemed necessary.
23 is a cone or other suitably shaped ledge or abutment fixed or formed on the
casing 1 and in it I form a recess to receive and hold firmly a portion of the tube 21.
This part 23 is fashioned with flat sides 24, 24 and is fitted into a corresponding
hole or recess cut in the thickened medial portion of the outer cover or tyre described
in the said Specification, and the rim 3 wherein it is locked as customary by a
nut 25 all as clearly illustrated in Figs. 1, 3 and 4.
In tyres where the outer cover does not extend into the trough of the rim, the
part 23 would be fitted entirely in the latter.
Thus the casing 1 and the connecting parts are attached to the air tube and
rim, strength and perfect tightness accruing while the sides 24, 24 obviate any
tendency of the valve to turn in its seat, but of course if desired, I
other equivalent devices for the part 23.
may substitute
The several parts herein described are, with the exceptions mentioned, made
of brass or other suitable material.
Although I have described my improvements as applied to pneumatic tyres I
wish it to be understood that, as before stated, they are applicable to inflatable
articles generally with little or no alteration as will be obvious without specific

page_text: reference, while again it will be understood that my improved mode of securing
can be employed with any arrangement of stop and non-return valves and con-
versely my improved valve can be secured in any other suitable way.
In practice find that valves constructed and secured as herein described pre-
sent advantages not obtainable by those at present in use, their ability to main-
tain tightness being very marked, also their simple construction renders them
cheap to manufacture and not liable to derangement.
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. A valve for pneumatic tyres and the like comprising a tubular externally
screwed casing, an internally screwed sleeve or nut with a terminal nozzle, a
tubular stop valve with transverse passages and a flexible vibrating non-return
valve, all arranged and adapted for use substantially as described and illustrated.
2. The combination and arrangement of the various parts, constituting the
improved valve for pneumatic tyres and the like, all arranged and adapted for use
substantially as herein described in reference to and shown in Figs. 1 and 2 of
the accompanying drawings and subject to the modifications described in refer
ence to Fig. 3 thereof.
3. Securing means for pneumatic tyres and the like comprising a nipple, or a
nipple and an abutment, on the valve casing in combination with a flexible tube
entering the interior of the air receptacle and fixed to the exterior thereof by a
flange substantially as herein described and shown in Figs. 1, 3 and 4 of the
accompanying drawings.
Iccompanying drawings.
Dated this 28th day of February, 1898.
For the Applicant,
PRYOR & HARVEY,
Agents, 3, St. Nicholas' Buildings, Newcastle-on-Tyne.