Improvements in Inflation Valves for Pneumatic Tyres.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Inflation Valves for Pneumatic Tyres.
I, PIERRE THOMAS PHILIP, of 53, Rue de l'Eglise, Paris, in the Republic of
France, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in valves for inflating the tyres of the
wheels of velocipedes and other vehicles.
According to my invention the body of the valve is formed at its lower part with
a conical seating to which is attached by cementing or otherwise a layer of india-
rubber, leather or other elastic or flexible material; this conical seating is designed
to receive a conical valve plug also lined with indiarubber, leather or other elastic
or flexible material, the said conical valve being fixed to the end of a spindle which
extends through the hollow central portion of the body of the valve and is screw
threaded at its upper end to receive a nut provided with a flattened portion to
enable it to be manipulated and resting upon the upper end or head of the valve
proper.
The said upper end or head of the valve body is furnished with india-rubber
packing to make a joint with an indiarubber lining on the interior of the cap of
the valve. This cap is formed with a shoulder upon which rests the edge of the
tightening ring screwed upon the valve.
When the air chamber or tube has been inflated and the nut has been tightened
to apply the valve against its seating the cap is placed in position and by tightening
the ring the india-rubber is forcibly pressed around the upper end of the valve
and against the cap. By this means a perfectly tight joint is obtained.
In a modified construction the nut rests in a recess in the head or upper end of
the valve.
The upper part of this head or end is formed with triangular notches and the
bottom of the nut is also formed in the same manner so that when the nut is un-
screwed to lift the valve from its seat there is play between the nut and the head
which permits the passage of air.
In another modification the valve plug is independent of its spindle and is re-
tained in place by a bar. The valve in this case only serves as a check valve during
inflation, for after inflation the closing of the passage is produced by a second check
valve lined with leather, india-rubber or other elastic or flexible material which is
pressed against an equally elastic or flexible lining formed on the seat for the said
second valve.
This second valve is carried by the spindle which is raised or lowered by means of
the nut which is retained in position by a collar provided with holes for the passage
of the air.
When the second valve is tightened against its seating a tight joint is obtained
but the end of the spindle raises the main valve. The valve is made absolutely air
tight by means of the cap.

page_text: Improvements in Inflation Valves for Pneumatic Tyres.
I, PIERRE THOMAS PHILIP, of 53, Rue de l'Eglise, Paris, in the Republic of
France, Manufacturer, 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 valves for inflating the tyres of the
wheels of velocipedes and other vehicles.
In the accompanying drawing:-
Figure is an elevation of a valve made according to my invention with the
cap removed:
Figures 2 and 3 are views of details:
Figure 4 is a longitudinal section of the complete valve:
Figure 5 is a view of a detail :
Figure 6 is an elevation of a valve specially designed for use with the tyres of
carriages:
Figures 7, 8, 9 and 10 are views similar to Figure 4 of modifications.
The body A of the valve is formed at its lower part with a conical seating a to
which is attached by cementing or otherwise a layer of india-rubber, leather or
other elastic or flexible material; this conical seating is designed to receive a conical
valve plug C also lined with india-rubber, leather or other elastic or flexible
material c, the said conical valve C being fixed to the end of a spindle or rod d which
extends through the hollow central portion of the body A of the valve and is screw
threaded at its upper end e to receive a nut f provided with a flattened portion
(shewn in Figure 5) to enable it to be manipulated and resting upon the upper end
or head of the valve A.
The said upper end or head i of the valve body A is furnished with india-rubber
packing k to make a joint with an india-rubber lining on the interior of the cap D
of the valve. This cap D is formed with a shoulder m upon which rests the edge
of the tightening ring E screwed upon the valve A.
When the air chamber or tube of the tyre has been inflated and the nut f has
been tightened to apply the valve against its seating the cap D is placed in position
and by tightening the ring E the india-rubber is forcibly pressed around the upper
end of the valve and against the nut f and cap D. By these means a perfectly
tight joint is obtained.
The arrangement illustrated in Figure 6 is similar in construction to that above
described but is larger and is especially designed for inflating the tyres of carriages
and similar vehicles.
In the modified construction shewn in Figure 7 the nut f rests in a recess h in the
head or upper end of the valve A. The upper part of this head or end i is formed
with triangular notches j and the bottom of the nut f is also formed in the same
manner so that when the nut is unscrewed to lift the valve from its seat there is
play between the said nut f and the head i which permits the passage of air.
In the modification illustrated in Figure 8 the valve plug C is independent of its
rod d and is retained in place by a bar o. The valve in this case only serves as a
check valve during inflation, for after inflation the closing of the passage is effected
by a second valve p lined with leather, india-rubber or other elastic or flexible
material which is pressed against an equally elastic or flexible lining q formed on
the seat for the said second valve p.
This second valve is carried by the spindle d which is raised or lowered by
means of the nut f, the said nut having a flat g and being retained in position by
a collar provided with holes for the passage of the air.

page_text: When the valve p is tightened against its seating a tight joint is obtained but the
end of the rod d raises the main valve C. The valve is made absolutely air tight by
means of the cap D.
In the arrangement shewn in Figure 9 the valve p is applied to an annular
seat.
In the construction illustrated in Figure 10 the said valve has the form of a
reversed cap and is applied against the conical bottom of the valve body A.
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:-
:-
The improved inflation valves for pneumatic tyres herein before described and
illustrated respectively in Figures 1, 2, 3, 4 and 5; 6; 7; 8; 9; and 10 of the
accompanying drawing.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.