Improvements in Inflating Valves for Pneumatic Tyres and other Inflatable Articles.
Year: 1898

page_text: Date of Application, 30th July, 1898
Complete Specification Left, 29th Apr., 1899-Accepted, 2nd June, 1899
PROVISIONAL SPECIFICATION.
Improvements in Inflating Valves for Pneumatic Tyres and other
Inflatable Articles.
I, ARTHUR LE NEVE FOSTER, of 61, Cadogan Square, Chelsea, in the County
of London, do hereby declare the nature of this invention to be as follows:--
This invention for improvements in inflating valves for pneumatic tyres and
other inflatable articles has for its object to produce an inflating valve which shall
be efficient and reliable in action and of simple construction.
According to this invention a cylindrical tubular casing, provided with a head,
and the usual nuts and washers for securing it to the air tube or other inflatable
article, is threaded internally with a long and finely pitched screwthread except at
its headed end which is perforated to form the air passage. Into this casing is
inserted a correspondingly screwthreaded hollow plug having its inner end closed
and slightly reduced so as to clear the threads of the casing, and perforated near its
end with air passages communicating with the interior thereof. In the end of the
threaded portion of the casing is placed a disc of leather or other suitable material,
perforated to correspond with the air outlet perforation in the casing, and which
acts as a seat for the end of the plug valve which when screwed firmly home on
the disc forms a perfectly air tight joint between them. When, however, the plug
valve is screwed back off its scat the air is permitted to pass down its interior,
through the air passages in its end and through the valve seat disc to the interior
of the article to be inflated.
The outer end of the plug valve is fitted with a screwed nozzle for the purpose of
connecting it to an air pump and with a non-return valve to prevent the escape
of air, while the plug valve is open during pumping operations."
Dated this 30th day of July 1898.
•
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
Improvements in Inflating Valves for Pneumatic Tyres and other
Inflatable Articles.
I, ARTITUR LE NEVE FOSTER, of 61, Cadogan Square, Chelsea, in the County
of London, 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 for improvements in inflating valves for pneumatic tyres and

page_text: other inflatable articles has for its object to produce an inflating valve which shall
be efficient and reliable in action and of simple construction.
The accompanying sheet of drawings illustrates in section two forms of inflating
valves constructed according to this invention.
Referring to Fig. 1, an externally screwthreaded tubular casing a provided with
a head and the usual nuts c d and washer e for securing it to the air tube of a
pneumatic tyre or other inflatable article is threaded internally with a long and
very finely pitched screwthread except at its headed end which is perforated to
form the air passage f. Into this casing a is inserted a correspondingly screw-
threaded hollow plug g having its inner end h closed and slightly reduced so as to
clear the threads of the casing, and perforated near its end with air passages i
communicating with the interior thereof. In the end of the threaded portion of
the casing is placed a disc of leather or other suitable soft or flexible material,
perforated to correspond with the air outlet passage f in the casing, and which acts
as a seat for the end of the plug valve which, when screwed firmly home on the
disc, forms a perfectly air tight joint between them. When, however, the plug
valve is screwed back off its seat the air is permitted to pass down its central
hore m through the air passages à in its end and through the valve seat disc / to
the interior of the article to be inflated, whilst at the same time any leakage of
air during inflation between the tubular casing a and the hollow plug gis
effectively prevented owing to its passage being checked by the long finely pitched
screw thread in tubular casing into which the thread on the hollow plug g
engages, and thus obviates the necessity of any gland nut or packing between the
tubular casing and the hollow plug.
The outer end of the plug valve is fitted with a screwed nozzle n for the purpose
of connecting it to an air pump and with a non-return valve o working in the bore
of the nozzle to prevent the escape or air while the plug valve is open during
pumping operations.
In the modified form of valve shown in Fig. 2 the non-return valve in the
outer end of the plug is dispensed with, the inner end of the plug about the air
passages being reduced in order to receive a short piece of elastic tube p which
covers the orifices of the air passages, and which, while allowing the free escape
of air when forced down the plug from without, effectually prevents its return.
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
1 claim is:-
1. The combination in an inflating valve for pneumatic tyres and other inflatable
articles of a tubular casing with a long finely pitched internal screw thread, the
length of thread being several times that of its diameter, a hollow screw threaded
plug fitting in said casing and having an air passage communicating with its
central bore, a non-return valve in said hollow plug, the lower end of plug being
utilized for closing a valve seating in the lower end of the tubular casing, the
outer end of plug terminating in a screwed nozzle for attachment to an air pump
or other apparatus substantially as described and shown in the drawings.
2. Inflating valves for pneumatic tyres and other inflatable articles arranged
and constructed substantially as hereinbefore described and illustrated in the
accompanying drawings.
Dated this 28th dor of Aneil 1800
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.