Improved Valve for Pneumatic Tyres and other Air Chambers.
Year: 1894

page_text: Date of Application, 9th Mar., .1894
Complete Specification Left, 10th Dec., 1894-Accepted, 12th Jan., 1895
PROVISIONAL SPECIFICATION.
Improved Valve for Pneumatic Tyres and other Air Chambers.
I, JOHN GEORGE AULSE BROOK KITCHEN of 28 Rose Grove, Ardwick,
Manchester in the County of Lancaster, Manufacturer do hereby declare the
nature of this invention to be as follows:-
This invention relates to valves for pneumatic tyres and other air chambers and
consists in an improved construction of said valves or combination of the parts
thereof, the object of the invention being the production of a cheap valve with few
parts which can act as a shut-off valve and back pressure valve and be opened for
deflating.
The improved valve consists of a short tube arranged for fixing to the air tube
or chamber and rim in the usual manner. The inner end of the tube is closed and
the tube bored out so as to leave on the end a projecting stem or nozzle through
which a small hole is drilled. The outer end of the tube is tapped internally with
a fine thread and into this is screwed a screw-plug turned down at the end to form
another stem or nozzle, a small hole being drilled through the plug and nozzle.
The plug is formed with a milled flange for turning it by and screwed at its outer
end for the attachment of the inflater nozzle or tube. Round each of the said
stems or nozzles a small helical spring is placed and between them a disc or valve
preferably made of vulcanite and of such diameter or shape that the air can pass
round the sides of it. The disc may be guided in the tube or have a pin put
through it entering the bore of both stems or nozzles. The spring at the inner end
is made somewhat stronger than that at the outer ends.
The action of the valve and manner of using the same are as follows: When
the screw-plug is screwed out so that neither spring is compressed, the disc_or
valve is held by them away from both nozzles, and the air tube is deflated. By
screwing the plug slightly in, the spring on it is compressed by the other stronger
spring and the valve or disc held against the nozzle of the plug, and when the
inflator is applied, the valve acts as a back pressure or non-return valve during
inflation. By screwing the plug further in, the valve is pressed by the nozzle of
the plug against the nozzle or stem of the tube and the outlet from the air tube
or chamber closed, so that the latter is kept inflated.
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.
COMPLETE SPECIFICATION.
Improved Valve for Pneumatic Tyres and other Air Chambers.
I, JOHN GEORGE AULSEBROOK KITCHEN of 28 Rose Grove Ardwick,
Manchester in the County of Lancaster, 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 valves for pneumatic tyres and other air chambers and

page_text: consists in an improved construction of said valves or combination of the parts
thereof, the object of the invention being the production of a cheap valve with few
parts, which can act as a shut-off valve and a back pressure valve and be opened for
deflating.
On the drawing appended hereunto Fig. 1 represents a section and Fig. 2 an
outside view of the improved valve.
The improved valve consists of a short tube a screwed outside and formed with a
head a¹ by means of which and the washer b and nut c it is connected to the air
tube of a pneumatic tyre or other air chamber, the nut d serving to fasten the
valve to the rim of the wheel in the usual manner. The air tube end of tube a is
closed or solid as shewn and the tube bored out so as to leave at the bottom of the
bore a projecting stem or nipple a² through which and the head a small hole a³ is
drilled. The outer end of the tube a is tapped internally with a fine thread and
into this is screwed a screw plug f turned down at the end to form another stem or
nipple a small hole f2 being drilled through the plug and nipple. The plug is
formed with a milled flange f³ for turning it by, and is screwed on its outer end for
the attachment of the inflator nozzle or tube. Round the nipple a² a small helical
spring g and round the nipple f₁ another spring his placed, and between them a
disc or valve l, made of metal, vulcanite or other suitable substance, and of such
diameter that the air can pass round the sides of it. The disc or valve 1 may be
formed with centre points as shewn or with central pins or have a pin put air tight
through it, to guide or hold it and cause it to come down on its seat on the nipples,
or it may be guided in the tube. The disc or valve may be formed with recessed
seatings as shewn. The spring 9 is made somewhat stronger than the spring / on
the plug f
g
The action of the valve and manner of using the same are as follows: When the
screw plug is screwed out so far that neither of the springs g and his compressed
the valve or disc is held by them away from both nipples, and the air tube is in
communication with the outer air and deflated. By screwing the plug slightly in,
the spring on it is compressed by the other stronger spring 9 and the valve or
disc held against the nipple of the plug, the parts being in the positions shewn
on the drawings. When the inflator is applied, the valve acts as a back pressure
or non-return valve during inflation. By screwing the plug further in, the valve l
is pressed by the nipple of the plug against the nipple a² of the tube a, and the
outlet a from the air tube or other air chamber is closed, so that the latter is kept
inflated, the valve acting as a stop or shut-off valve..
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 construction of a valve for pneumatic tyres and other air chambers or the
combination of the parts thereof substantially as hereinbefore described and
illustrated by the drawings.
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.