Improvements in the Connection Fittings of Pueumatic Tyre and like Valves and Inflators, and in Dust or Sealing Caps for the said Valves.
Year: 1893

page_text: Date of Application, 11th Nov., 1893
Complete Specification Left, 9th July, 1894-Accepted, 25th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Connection Fittings of Pueumatic Tyre and
like Valves and Inflators, and in Dust or Sealing Caps for the
said Valves.
I, WALTER PURSER, of the Firm of G. and W. Purser, of Palmer Street, in the
City of Birmingham, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to the connection ends of pneumatic tyre and other like
valves, and also to the end fittings of the flexible air-pump connections and also the
dust or sealing caps to be used therewith, and has for its object primarily, an
instantaneous connection.
Usually the tail entrance to the valve is outside wormed, whilst the end fitting of
the flexible connection is inside wormed, and takes and screws upon the former,
which is troublesome in consequence of the flexible stem and parts carrying it
having to be revolved during the screwing home of the said pump part connection
upon the valve part, which remains a fixture within the tyre or other article.
A like draw-back is experienced in respect to the dust or sealing cap, which is
screwed home upon the valve tail end in the same way as the end connection of the
pump.
In carrying out my invention, I make the tip of the tail end to the valve bulbous
or swelled alike unto a spherical head, over which the end fitting of the flexible
connection part of the pump, as hereinafter described, passes.
Thus, the inlet or entrance to the valve, which is located outside the tyre, is
made in the form of a stalk with a bulbous or spherical end or head, and with an
axial hole down its middle leading to the seat of the check of the valve.
The end fitting of the flexible connection of the pump to take upon the said
bulbous tail end consists of a hollow and chambered body part or ferrule having an
outside screwed tail-piece with an axial hole through it, and with the body part
chambered to two diameters, and with the mouth entrance to the said chamber
slightly choked for the purpose of preventing the outward displacement of an india-
rubber bush or collar placed within that part of the chamber next the mouth
entrance and which is of larger diameter.
Thus, the inside body part of the end fitting chambered to two diameters, the
one nearest to the mouth entrance being the larger, and within which latter, an
india-rubber bush or block with the hole or a hole through its middle of less
diameter than the bulbous tail end of the valve part.
By the step chambering of the interior, the inserted rubber bush or block, which
makes the instantaneous and tight joint, is kept in its duly assigned position in the
fore part of the said end fitting, and when the same is pressed over the bulbous tail
end of the valve, the rubber around the hole is compressed and displaced outwardly
or centrifugally until the spherical head has passed the rubber and come into the
chamber of smaller diameter, when the said rubber closes itself forcibly upon the.
neck, hence an air-tight joint.
When the pump is worked, a tighter joint is created by the pressure of the air at
the back of the rubber and within the second chamber exerting itself upon the face
of the rubber, compressing it laterally and forcing the same centripetally around
the said neck of the bulbous tail end, hence a perfect joint consequent upon the fact
that the greater the inside pressure the tighter the joint.

page_text: In making the connection of an end fitting of a pump, simply press the same over
the bulbous tail end of the valve when the necessary air-tight or sound coupling is
effected.
The dust cap is constructed alike unto and upon the same principle as the end
fitting therefore it will be unnecessary to describe the same.
I might add that instead of the valve having a bulbous tail end, it may have a
plain stalk or tail end, with the tip of the same or a part near to the tip provided
with a circumferential collar or collars or equivalent.
. Instead of the end fitting being carried by the pump connection, it may be
carried by the valve, when the tail end would, in this case, be carried by the
pump.
In carrying out a further form of my invention, I make the pump-end fitting, as
aforesaid, in two parts, viz., a shank part and a body or cap part.
The former is outside wormed, whilst the latter is inside wormed and screws upon
the former. The face of the shank part is of the same inside diameter as the
hollow of the body part which is fitted with a centrally pierced block of rubber
coming coincident or axial with a hole through the front face of the said body
part.
The hole or piercing in the face of the front of the body part is a little larger in
diameter than the bulbous tail end of the valve part, whilst the hole in the rubber
block located in the hollow of the said body is of more or less the diameter of the
larger part of the bulbous tail end, so that in making the connection of the pump
with the valve, the end fitting passes freely over the tail end, of the valve, then by
rotating the body part, the same is screwed upon the shank part, and the rubber
block enclosed therein laterally compressed between the opposed faces or parts of
the shank and body parts, hence a sound joint by the closing centripetally of the
rubber around the neck rear of the bulbous tail end.
By this modified form of my invention the connection is readily effected and a
perfect sound joint made without relying upon the inside pressure of the air as the
tightening-up medium.
As a still further form, I take two parts alike unto the last arrangement, but
instead of employing a block of rubber as the joint, I employ a bell-shaped one
lying within a chamber of the head part and with a contracted end of the said
rubber joint part brought approximate to a coned or curved seating sunken within
the middle of the opposed face of the shank part of the said end fitting, so that on
screwing up the head part after the end fitting has been placed upon a bulbous tail
end, the rubber joint may be contracted or gathered in by the action of the coned
or cupped sinking as aforesaid impinging upon it, whilst the back pressure of the
air also increases the efficiency of the front by forcing the rubber joint lying around
the neck connection of the valve into a more intimate contact, hence an absolutely
Bound joint.
The end fitting with rubber joint, may, if necessary, be provided with an
auxiliary lock in the form of a bayonet snap or other joint, that is, in case of a
bayonet joint the bulbous tail end has a pin upon its shank part which takes into a
bayonet or like slot in the end fitting part.
My improvements are if necessary capable of being adapted to already existing
valves.
In the first end fitting connection, instead of leaving an air chamber at the rear
of the rubber joint, the rubber joint may be made to completely fill up the whole of
the hollow interior.
Dated this 10th day of November 1893
WALTER PURSER,
By Henry Skerrett,
Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Connection Fittings of Pneumatic Tyre and
like Valves and Inflators, and in Dust or Sealing Caps for the
said Valves.
I, WALTER PURSER, of the Firm of G. and W. Purser, of Palmer Street in the
City of Birmingham, Manufacturer, do hereby declare the nature of this invention
and in what mauner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
My invention relates to the connection ends of pneumatic tyre and other like
valves, and also to the end fittings of the flexible air-pump connections and also to
the dust or sealing caps to be used therewith, and has for its object primarily
an instantaneous connection.
Usually the outer end of the body of the valve is outside wormed, whilst the end
fitting of the flexible connection is inside wormed, and takes and screws upon the
former, which is troublesome in consequence of the flexible stem and parts carrying
it having to be bodily rotated during the screwing home of the said pump
connection upon the valve end, which remains a fixture relative to the tyre or other
article.
A like draw-back is experienced in respect to the dust or sealing cap, which
is screwed home upon the valve tail end in the same way as the end. connection of
the pump.
In carrying out one form of my invention, the extremity of the outer part of the
valve is made bulbous, or formed into a swell tail end, over which the end fitting of
the flexible connection part of the pump or inflator passes.
Thus, the outwardly presented portion of the valve, whose body is tubular,
is made bulbous or spherical, with an axial hole up its middle leading to the stalk.
The end fitting of the flexible connection of the pump consists of a hollow or
chambered body part or ferrule, having an outside annularly ratchet-grooved tail
end or piece upon which an end of the rubber tubing of the connection takes. The
body part of the metallic fitting may be chambered to two diameters, with one of
them fitted with a rubber block or bush, having an axial hole through its
middle, whilst the other chamber may be unoccupied, and may form a pressure
cavity.
To make an instantaneous connection and a tight joint, force the rubber-lined
connection over the bulbous tail end of the valve, then work the pump in the usual
way when a tighter joint is made by the pressure of the air exerting itself upon the
back of the rubber through the second chamber.
The dust or sealing cap is constructed alike unto, and upon the same principle as,
the end fitting of the flexible connection.
Figure 1 of the accompanying drawing represents, partly in vertical section, and
partly in elevation, the connection fittings of both the valve of a pneumatic tyre
and the flexible connection of an inflator or air pump, each having or being provided
with improvements made according to one form of my invention.
Figure 2 represents the valve separately, whilst Figure 3 represents the end of
the flexible connection separately.
Figure 4 represents the loose stalk of the valve, with its bulbous tail end, removed
from the valve body.
Figure 5 is a cross section upon the dotted lines - Figure 3.
Figure 6 is a topside plan of the flexible end connection Figure 3.
A is the valve of a pneumatic tyre, and B is the flexible connection of an air
pump or inflator.
a is an outside screwed tubular body part, interiorly fitted with a hollow stalk b,
whose outer part 61, is formed into a bulbous tail end 3, upon which the metallic end

page_text: fitting c, of the flexible connection B, of an air pump or inflator takes, when a tyre
is required to be inflated.
a
Thus, the inner end of the stalk b, is of the ordinary construction, whilst the
outer end, which has a shoulder b, is fitted with a bulbous tail-end b, having
hole, through its middle leading to the interior of the stalk, which has an
outlet 6, and is covered by a loosely fitted rubber check-sheath ¿®.
The other part of the valve has a screw cap d, for locking the stalk in the
interior of the body, after inflation of the tyre.
The metallic end fitting e, of the flexible connection B, has a chambered inside
part c', fitted with a rubber block or washer e, having through its middle an axial
hole e', with a bore of a less diameter than that of the swell of the bulbous
tail end. This rubber block is kept within its chamber by the turned-over
edges c², at the mouth entrance to the said chamber, which has below it a secondary
chamber, and an axial hole c, taken through an annular and ratchet-grooved
stem c, upon which the end gl, of the flexible pipe or tubing g, takes.
Figure 7 represents, partly in section and partly in elevation, the valve end fitted
with a dust or sealing cap.
а
A is the valve, and 2 a bulbous tail end or outside terminal of it, upon which the
cap C, which is of the same construction as the end of the flexible connection
already described, takes. Thús the cap C, consists of a shell c, with an open mouth,
and a chamber c', filled with a block of rubber or like suitable material e, kept in
position within the chamber by turning over the edges of the metal of the mouth.
is a chain, connected to the knob e, at the closed end of the cap.
Instead of the end fitting being carried by the pump connection it may be
carried by the valve, when the tail end would, in this case, be carried by
the pump.
Figure 8 represents such an arrangement, in which a is the body of the valve,
and 6 the stalk, having upon its outer part, a boxed end or cap c, chambered to two
diameters at c¹, f, and with the former c', which is of larger diameter, fitted with a
rubber block e, having an axial hole e', through it.
The flexible connection B, has a metallic fitting b, with a bulbous tail end b¹,
and a connection shank 6, upon which an end of the rubber tubing g, takes.
Instead of a second chamber being provided at the back of the rubber joint, the
end fitting may be made without this, and the rubber block may be made to fill up
the whole of the cavity.
Figure 9 represents a valve stalk, with the tail end provided with a series
of annular collars, instead of a bulbous termination, with a neck, as in the former
figures.
In carrying out. a further form of my invention, I make the pump end fitting, as
aforesaid, in two parts, viz., a shank part and a body or cap part.
The former is outside wormed, whilst the latter is inside wormed and screws upon
the former. The face of the shank part is of the same inside diameter as the hollow
of the body part, which is fitted with a centrally pierced block of rubber coming
coincident or axial with a hole through the front face of the said body part.
The hole or piercing in the face of the front of the body part is a little larger in
diameter than the bulbous tail end of the valve part, whilst the hole in the rubber
block located in the hollow of the said body is of more or less the diameter of the
larger part of the bulbous tail end, so that in making the connection of the pump
with the valve, the end fitting passes freely over the tail end of the valve, then by
rotating the body part, the same is screwed upon the shank and the rubber block
enclosed therein is laterally compressed between the opposed faces or parts of the
shank and body, hence a sound joint by the closing centripetally of the rubber
around the neck rear of the bulbous tail end.
By this modified form of my invention the connection is readily effected and
a perfect sound joint made without relying upon the inside pressure of the air as
the tightening-up medium.
Figure 10 represents such an arrangement as last described.

page_text: A is the valve and B is the flexible connection.
In the valve part, a is the hollow body, outside fitted with a cap d, and fitted
interiorly with a stalk b, the fore part of which has a bulbous tail end 6, over which,
the pump end connection c, takes.
Thus, in the said connection, c¹ is an inside screwed cap, with a hole c*, through
its middle, of larger diameter than the bulbous tail end, and adapted to take upon
the screwed and hollow shank e', of the stem et, upon which the rubber connection g,
takes. Located within the chamber, of the cap c', is a rubber or like block e,
with a hole through its middle. By rotating the cap e', in one direction, the said
rubber block is compressed between the inside crown of the said cap, and the outside
shoulder, of the shank c', but when rotated in the reverse direction, pressure is
relieved, and the rubber returns to its normal state and dimensions.
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
First. In the connection fittings, of pneumatic tyre and like valves and
inflators, providing the one part with a bulbous or swelled tail end, and the other
part with a rubber-lined she-end, substantially as and for the purpose as described
and set forth.
Secondly. In the connection fittings of pneumatic tyre and like valves, providing
or fitting the same, or the outer part of the stalk of the same, with an axially
pierced and bulbous tail end, upon which the she connection end of a pump fitting
takes, for making an instantaneous connection, substantially as described and set
forth in Figures 1 to 6.
Thirdly. In the end fittings of inflator flexible connections for taking upon the
bulbous tail ends of valves, fitting the interiors of the same with a middle-pierced
rubber block, with or without a pressure chamber, at its back, substantially as and
for the purpose as described and set forth.
·
Fourthly. In dust or sealing caps for the valves of pneumatic tyres, construct-
ing, arranging and fitting the same in the way substantially as described and set
forth.
Fifthly. In valve and pump-connection end fittings, the general construction,
arrangement and combination of the parts, substantially as described and set forth
in the several figures of the drawing.
Dated this (th day of July 1894.
Dated this (th day of July 1894.
WALTER PURSER,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant.