Improvements in Valves for Tyres.
Year: 1894

page_text: Date of Application, 'th Jan.. 1894
Complete Specification Left, 8th Oct., 1894-Accepted, 10th Nov., 1894
PROVISIONAL DI MOLTTOA
Improvements in Valves for Tyres.
We, THE PALMER TYRE LIMITED of 15 Martineau Street, Birmingham in the
County of Warwick, Manufacturers and CHRISTIAN HAMILTON GRAY, Engineer,
of Silvertown, Essex, do hereby declare the nature of this invention to be as
follows:-
This invention relates to valves used with pneumatic tyres for wheels and may
be constructed as follows;-
A body piece is provided with a through-way for the air, a head to go inside the
air tube or tyre, a peripheral recess or neck against the head preferably of smaller
diameter than the rest of the body, the body itself being screwed externally
throughout its length or at its outer end. Upon the body is placed a washer or
packing ring and upon this a sleeve adapted to fit over the body and be screwed
firmly upon the packing ring or washer to be screwed further down upon that by
a nut screwing on to the body and against the ring or washer, or the sleeve itself
may screw upon the body.
At its outer end a suitable cap or cover screws on to the body and retains in
position a flanged seating against which the valve which is carried in an enlarge-
ment of the through-way in the body bears. The valve at the side nearest the
tyre is provided with a flat, square or other suitable extension to prevent it turning
round and at the other side its spindle which is screwed projects in the bore of the
seating. A nut which enters the bore of the seating from the outside and has a
milled head by which it may be turned screws on to the valve spindle which by
this means may be firmly drawn on to the seating.
Dated this 8th day of January 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Valves for Tyres.
We, THE PALMER TYRE LIMITED of 15 Martineau Street, Birmingham, in the
County of Warwick, Manufacturers and CHRISTIAN HAMILTON GRAY, Engineer,
of Silvertown, Essex, do hereby declare the nature of this invention and in
the same is to be performed to be particularly described and
ascertained in and by the following statement:-
what manner
This invention relates to valves used for pneumatic tyres for wheels and will be
best understood by reference to the accompanying drawings, in which
Figure 1 is a part longitudinal section through the valve showing the latter
closed, and
Figure 2 is a similar view through a part of the valve showing the latter open.
Like letters represent like parts throughout the drawings.
A represents the body having a central longitudinal opening A' for the passage
of the air, a head A2 to go inside the air tube or tyre B and a peripheral recess
or neck A against the head preferably of smaller diameter than the rest of the
body, the body itself being screwed externally as at A' throughout its length or at

page_text: its outer end. Upon the body is placed a washer or packing ring C and upon
this again a sleeve D adapted to fit over the body and be forced against the ring
or washer C by the nut E which screws on to the body A and may be milled or
provided with flats upon its periphery to give purchase in screwing it up. The
head A2 and the washer C may be provided with annular grooves F to assist in
bedding tightly upon the air tube B so as to produce an air-tight joint. In
practice the rim of the wheel (not shown in the drawing) would come between the
end of the sleeve D and the washer C, thus serving to tighten the latter upon the
rubber tube B.
At its outer end a suitable cap or cover G screws on to the body A and retains
in position a flanged seating H upon the inner face H' of which the valve I is
seated. The valve is provided upon one side with a screwed spindle l¹ and upon
the other with a preferably flat extension 12 adapted to fit and move in a corre-
sponding groove or equivalent J formed in the body A, the breadth of which in
its widest direction is greater than the diameter of the bore A', while the thickness
of 12 and the width of J in its narrowest direction is less than the bore A¹, thus
preventing the valve from turning while the nut to be presently mentioned is being
turned and at the same time allowing passage for the air through the bore A' at
both sides of the flat extension 12. An india-rubber packing ring H³ may be
placed upon the seating H to make an air-tight joint between the flange H³ of the
seating and the end of the body A at A when the cap G is screwed up.
preferably circular recess A is formed in the outer end of the body A in which
the valve I plays when the tyre is being inflated.
A
An internally screwed cap K screws on to the end of the valve spindle I' and its
head K' taking a bearing upon the outer end of the valve seating H is capable,
when screwed home, of drawing the valve I outwards and thus securely fixing it
upon its seat H'.
Except when the tyre is being inflated the various parts of the valve are in the
positions shown in Figure 1 of the drawings; when it is desired to inflate the
valve the cap K is unscrewed by the milled head or flange K¹ and removed, its
loss being prevented by a chain or equivalent L. The pump fitting is then screwed
into the cylindrical portion of the valve seating H which is screwed internally
at H for the purpose, and upon the air being pumped in, it lifts the valve I from
its seat, the recess A allowing of its movement as indicated in Figure 2, and the
air then passes by the bore A into the interior of the air-tube. Upon the pressure
of the pump being relaxed on the return stroke the pressure of the air in the tyre
will return the valve to its seat to be again lifted off at the next operation of the
pump. After the inflation is completed the pump is removed and the cap K
inserted, and screwing on to the valve stem fixes the valve firmly on its seat.
diameter of the cylindrical portion K of the cap K K is smaller than the internal
diameter H of the seating I so that the cap can be placed in position and removed
without interfering with the seating; moreover the exterior of the cylindrical
portion K is not screw-threaded.
The
The back of the valve is prevented from fitting close upon the bottom of the
recess A and thus preventing the passage of the air past it into the bore A' by
the projections I' which are only of the width of the flat extension I'.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is ;-
1. In an air valve the combination with a headed body such as A A' of a loose
washer or ring such as C a sleeve such as D and nut E substantially as described
and illustrated in the accompanying drawings.
2. In an air valve the combination with a body such as A having a central
bore A¹ of a recess such as A° to accommodate the valve and a groove such as J
to prevent the valve from turning round substantially as described and illustrated
in the accompanying drawings.

page_text: 3. In an air valve the combination with a valve body having a recess such
as A and valve such as I of a seating such as H H and screwed cap such as G
substantially as described and illustrated in the accompanying drawings.
4. In an air valve the combination with a valve seating such as H H valve I
aud screwed stem I' of a screwed cap such as K substantially as and for the purpose
described and illustrated in the accompanying drawings.
5. The combination and arrangement of parts constituting the complete air
valve substantially as described and illustrated in the accompanying drawings.
Dated this 5th day of October 1894.
For THE PALMER TYRE LIMITED,
T. W. WILKINSON, Secretary.
C. H. GRAY.
W. P. Thompson & Boult,
Agents for the Applicants.
For THE PALMER TYRE LIMITED,
T. W. WILKINSON, Secretary.
C. H. GRAY.
W. P. Thompson & Boult,
Agents for the Applicants.