Improvement in or appertaining to Valves for Inflating the Tyres of Wheels.
Year: 1892

page_text: Date of Application, 19th July, 1892
Complete Specification Left, 19th Apr., 1893-Accepted, 2nd June, 1893
PROVISIONAL SPECIFICATION.
Improvement in or appertaining to Valves for Inflating the Tyres
of Wheels.
We JOHN BENNETT PRICE of 13 Fishergate Hill, Preston, in the County of
Lancaster, Manager at the works of Messrs. Chas. Macintosh & Co. Limited, and
CHAS. MACINTOSH & Co. LIMITED of Cambridge Street, Manchester, in the
County of Lancaster, Indiarubber Manufacturers do hereby declare the nature of
this invention to be as follows:-
Our said invention relates to an improvement in valves used for inflating what
are commonly known as pneumatic tyres for vehicles and relates particularly to
that form of inflating valve in which the air is forced through a netallic valve
block or spindle (usually of brass or copper) covered with an elastic diaphragm of
vulcanised indiarubber.
It is found that in such valves a corrosive action is set up between the vulcanised
indiarubber and the metallic valve block or spindle which eventually destroys the
nature of the diaphragm and causes it to cleave to the valve block and to break or
burst over the orifices.
To overcome this defect we form on the valve block or spindle at the part where
it comes into contact with the indiarubber diaphragm an insulating coating of tin
or other material which does not produce the aforesaid corrosive action when in
contact with vulcanised indiarubber or in some cases we may make the valve block
or spindle at that part of solid tin or other metal or alloy which does not act on
vulcanised indiarubber in the manner referred to.
Dated this Eighteenth day of July 1892.
EDWARD TURNER WHITELOW,
70, Deansgate, Manchester, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvement in or appertaining to Valves for Inflating the Tyres
of Wheels.
We JOHN BENNETT PRICE of 13 Fishergate Hill Preston in the County of
Lancaster Manager at the works of Messrs. Chas. Macintosh & Co. Limited, and
CHAS. MACINTOSH & Co. LIMITED of Cambridge Street, Manchester in the
County of Lancaster, Indiarubber Manufacturers 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 and accompanying
drawing
Our said invention relates to an improvement in valves used for inflating what
are commonly known as pneumatic tyres for vehicles and particularly to that form
of inflating valve illustrated in the accompanying drawing in which the air is
forced through a metallic valve block or spindle a (usually of brass or other alloy
of copper) covered with an elastic diaphragm or jacket b of vulcanised indiarubber.
When air is forced through such a valve the elastic diaphragm or jacket is raised
and allows the injected air to pass to the interior of the tyre while the back
pressure of the air causes the elastic diaphragm to close and prevent the egress of
the air through the orifice which gives access to the interior of the valve block or
spindle.
It is found that in such valves a corrosive action is set up between the vulcanised
indiarubber and the metallic valve block or spindle which eventually destroys the

page_text: diaphragm and causes it to cleave to the valve block and to break or burst over the
orifice or orifices through which the air is injected.
To overcome this defect we form or deposit on the valve block or spindle at the
part a where it comes into contact with the vulcanised indiarubber an insulating
coating of tin or other material which does not produce the aforesaid corrosive
action with vulcanised indiarubber.
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-
1. The use in combination with the valve spindle of an inflating valve of the
kind described of an insulating coating for preventing corrosive action between the
vulcanised indiarubber diaphragm and the metallic valve block or spindle sub-
stantially as set forth.
Dated this 18th day of April 1803
EDWARD TURNER WHITELOW,
70, Deansgate, Manchester, Agent for the Applicants.