Improvements in Safety Valves for Pneumatic Tyres.
Year: 1898

page_text: Date of Application, 20th Oct., 1898-Accepted, 17th Dec., 1898
COMPLETE SPECIFICATION.
Improvements in Safety Valves for Pneumatic Tyres.
We, ARTHUR CHILD, of Haselrig, Regent Road, Lowestoft, in the County of
Suffolk, Cycle Agent, and Messrs. Ross COURTNEY & COMPANY LIMITED, whose
registered office is at 25, Ashbrook Road, Upper Holloway, London, in the
County of Middlesex, Manufacturers, do hereby declare the nature of this inven-
tion 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 safety valves for pneumatic tyres, and it consists in
combining with such valves a whistle or other device for giving an audible signal
when the valve is blowing off, and in combining the said valve with an ordinary
inflating valve.
In the accompanying drawing which illustrates this invention:;—
Figure 1 is a view in side elevation, and
Figure 2 is a view in sectional elevation.
Throughout both views similar parts are marked with like letters of reference.
Our improved invention comprises a hollow stem A threaded at its lower end
to adapt it to be screwed on to the nozzle a, of an inflating valve X. In the upper
part of this hollow stem A is a seating a adapted to receive a valve B which may
be of the type shown, or of any other suitable type. This valve is kept down on
its seating by a spring C enclosed by a cap D threaded on the upper end of the
hollow stem A and provided with an orifice d. A lock nut D is also provided
to lock the cap D on the stem A in any suitable position according to the strength
it is desired to give to the spring C. On to the top of the cap D is a whistle E
or any other suitable and convenient device for giving an audible signal when the
safety valve is blowing off.
At right angles to the stem A is a second hollow stem A which is threaded
exteriorly to receive the nozzle of the inflator. This hollow stem A' communi-
cates with the interior of the hollow stem A beneath the valve B so that the air
pumped into the stem A passes into the tyre until the pressure within the tyre
equals or exceeds the pressure required to lift the valve B. When this point
is reached the air pumped into the stem A lifts the valve A and escapes through
the orifice of the cap and so acts on the whistle or other sounding device and
gives an audible signal that the tyre is fully inflated.
The cap
D) and the lock nut 1) provide a ready means of varying the pressure
necessary to lift the valve B according to the pressure it is desired to have in the
tyre.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
(1) The combination with a safety valve for pneumatic tyres, of a device for
producing an audible signal when the safety valve blows off, as and for the
nurnose set forth

page_text: (2) The combination with an inflating valve for pneumatic tyres, of a safety
valve, and of a whistle or other device for giving an audible signal when the
air escapes from the safety valve; as set forth.
Dated this 20th day of October 1898.
ROBERT E. PHILLIPS, Assoc.M.Inst.C.E., M.I.Mech.E.,
Chartered Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.