Improvements in Air Valves.
Year: 1898

page_text: Date of Application, 14th Apr., 1898-Accepted, 8th Oct., 1898
WEDELE DREIFICATION.
Improvements in Air Valves.
We, JAMES HARRY KEIGHLY MCCOLLUM, Electrician, of 1001, Bathurst Street,
REMIGIUS ELMSLEY, Esquire, of 35, Adelaide Street East, and WILLIAM HENRY
BROUSE, Barrister, of corner Wellington and Church Streets, all of the City of
Toronto, in the County of York, in the Province of Ontario, Canada, do hereby
declare the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
Our invention relates to improvements in air valves and the object of the inven-
tion is to devise a valve particularly adaptable for bicycles, which will be always
absolutely air tight except during the period that the air is being pumped
through it and be so air tight quite independently of the usual cap and it consists
essentially of a valve comprising a suitable hollow casing with enlarged upper
end, the lower end of the casing being provided with a tubular elastical covering
preferably of rubber and the interior being provided with a hollow stem with a
head screwed into the threaded upper interior portion of the casing and an enclos-
ing cap provided with a suitable washer for closing the upper end of the stem
and a screw nut having a central hole, which fits over a stem on the end of the
closing cap, such cap being of less diameter than the portions of the hollow
casing in which it fits and the screw cap of the stem and screw nut being pro-
vided with side notches arranged as hereinafter more particularly explained.
Fig. 1, is a sectional perspective view of a valve constructed in accordance with
our invention showing it completely closed.
Fig. 2, is a similar view showing the outer cap removed and the inner cap
raised to permit of deflation of the tyre, or other air space.
Fig. 3, is a detail of the stem.
Fig. 4, is a detail of the outer cap.
Fig. 5, is a detail of the inner cap and screw nut connected thereto..
In the drawings like letters of reference indicate corresponding parts in each
figure.
A is the casing, which consists of the enlarged upper portion A¹ internally
threaded at a and the reduced lower portion A, which is provided with a tubular
covering B of rubber or other suitable elastic material, which is suitably fastened
to the outside of the portion A2 by thread or other suitable fastening, so as to
make an air tight connection between the tube and the portion A². The tube B
preferably extends down below the bottom of the portion A2 as indicated.
C is the ordinary mushroom, which is secured on the reduced portion Aª as
indicated.
D is a hollow stem provided with a head D' having a screw thread d and side
notches d. The stem D when screwed down to its seat as indicated in the draw-
ings projects below the bottom of the portion A2 and as the stem is of less diameter
than the interior hole a¹ a clear annular passage way is provided from the upper
threaded portion of the valve down to where the tube B presses upon the stem.
The notches & permit of the passage of the air to the hole a around the stem.

page_text: It will be noticed that the head I) has a reduced upper end 2 of substantially
the same diameter as the major portion of the stem.
E is a cap provided with a lower circular recesse having located therein a
circular washer el. The cap. E is provided with an upwardly extending stem e³,
which extends through a screw nut F. These portions are securely though
loosely held together, the upper end of the stem being pinched at f in its
manufacture, so as to press it and enlarge it after such stem has been inserted
into the hole e, and thereby serves to retain the nut and cap together. A cross
notch f extends across the top of the nut F.
G is the outer cap which is provided with a knurled enlarged central portion G³,
threaded lower end G2 and cylindrical upper end G3 provided with projections g.g.
Having now described the principal parts involved in our invention we shall
briefly describe the utility of our valve. In the position, in which the valve is
shown in Fig. 1, it will be noticed that the washer e of the cap E rests upon
the top of the valve stem D. It will therefore be seen, that if the cap, G, is
removed, that the stem will be still air tight, the central hollow stem being
closed and the rubber tube hugging closely the end of the stem D. Consequently
it does not matter in our valve whether the cap G is removed or not, but in order
to keep the dirt out, it will be preferably used as well as for the other purpose
which we shall now describe.
In order to deflate the valve stem the cap G when removed may be turned up
side down and the projections 7 inserted into the notch f¹ on each side of the
stem of the cap .E.
....
By now turning the screw nut F the cap E may be raised into the position
shown in Fig. 2. By so raising the cap there, will be no rotary motion com-
municated to it at least until it is entirely off its seat. It will thus be seen that
there will be no tendency for the washer e, which is preferably of rubber to
become worn out as would be otherwise the case if the cap E and nut F were
integral.
In lowering the cap E down into the position shown in Fig. 1, it will also be
noticed that the washer e¹ will also be brought into direct contact with the top d³
of the hollow. stem D and this too without turning the cap or injuriously affect-
ing the washer.
3.
In the position in which the cap E is shown in Fig. 2 it will be clearly under-
stood that the tyre will be readily deflated.
As it is of course very seldom necessary to deflate the tyre the stem D will be
very seldom disturbed.
It will be noticed that we preferably reduce the diameter of the lower end of
the stem and provide substantially V-shaped annular rings, which we find in
practice effectually prevents any retrocession of the air.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to, be performed, we declare that what
we claim is :-
1. An air valve comprising the casing having an enlarged upper end internally
threaded, the stem fitting therein and extending below the bottom of the casing,
so as to leave a passage-way around it into the upper portion of the casing, the
elastical tube fitting the lower portion of the casing and hugging the bottom
of the hollow stem, a suitable head attached to the top of the hollow stem pro-
vided with apertures and means for closing the top of the hollow stem as and
for the purpose specified.
2. An air valve comprising the casing having an enlarged upper end internally
threaded, the stem fitting therein and extending below the bottom of the casing,
so as to leave a passage-way around it into the upper portion of the casing, the
elastical tube fitting the lower portion of the casing and hugging the bottom
of the hollow stem, a suitable head attached to the top of the hollow, stem pro-
vided with apertures and an exterior thread on the head for securing it in position

page_text: and a cap of less diameter than the interior of the casing provided with a circular
bottom recess and washer therein and a screw connection to the thread of the
hollow casing and means for vertically adjusting the cap to and from the top
of the hollow stem and suitable apertures in the thread of the screw nut as and
for the purpose specified.
.
3. In an air valve, in combination the casing having an enlarged upper end
internally threaded, the stem fitting therein and extending below the bottom of
the casing, so as to leave a passage-way around it into the upper portion of the
casing, the elastical tube fitting the lower portion of the casing and hugging the
bottom of the hollow stem, a suitable head attached to the top of the hollow stem
provided with apertures and an exterior thread on the head for securing it in
position, a cap of less diameter than the interior of the casing provided with a
circular bottom recess and washer therein and upwardly extending stem having
an enlarged upper end, a screw nut having a central hole through which such
stem extends and by which the cap and nut are connected together and side
notches in the nut as and for the purpose specified.
4. In an air valve, in combination the casing having an enlarged upper end
internally threaded, the stem fitting therein and extending below the bottom
of the casing, so as to leave a passage-way around it into the upper portion of
the casing, the elastical tube fitting the lower portion of the casing
and hugging the bottom of the hollow stem, a suitable head attached to the
thread
top of the hollow stem provided with apertures and an exterior
on the head for securing it in position, a cap of less. diameter than the interior
of the casing provided with a circular bottom recess and washer therein and a
screw connection to the thread of the hollow casing, means for vertically adjust-
ing the cap to and from the top of the hollow stem and suitable apertures in the
thread of the screw nut, a cross notch at the top of the nut and the outer cap
provided with a correspondingly shaped projection to fit into the cross notch of
the nut as and for the purpose specified.
5. In an air valve, in combination the casing having an enlarged upper end
internally threaded, the stem fitting therein and extending below the bottom of
the casing, so as to leave a passage-way around it into the upper portion of the
casing, the elastical tube fitting the lower portion of the casing and hugging
the bottom of the hollow stem, a suitable head attached to the top of the hollow
stem provided with apertures and an exterior thread on the head for securing it
in position, a cap of less diameter than the interior of the casing provided with
a circular bottom recess and washer therein, an upwardly extending stem having
an enlarged upper end, a screw nut having a central hole through which such
stem extends and by which the cap and nut are connected together and side
notches in the nut, a cross notch in the nut and the outer cap provided with.
projections designed to fit into the notch on each side of the central stem of the
cap as and for the purpose specified.
6. An air valve comprising the casing, the stem fitting therein and extending
below the bottom of the casing, so as to leave a passage-way around it into the
upper portion of the casing and having the annular projections on the lower
portion of the stem, the elastical tube fitting the lower portion of the casing and
hugging the annular projections on the bottom of the hollow stem and means
for closing the top of such stem as, and for the purpose, specified.
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.