Improvements in Valves for Pneumatic Tyres.
Year: 1892

page_text: Date of Application, 19th Dec., 1892
Complete Specification Left, 16th Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres.
We TOM ROTHWELL and FRED ROTHWELL trading as The Eclipse Machine
Company of Viscount Street Rochdale Road Oldham, in the County of Lancaster,
Machine Makers, do hereby declare the nature of this invention to be as
follows:-
This invention relates to valves for which we have applied for Letters Patent
No. 1158 on the 21st day of January 1892, the object being to improve the
construction thereof and make them more convenient for use.
In the first place we so form the outer end of the valve and the nozzle of the
adapter or end of the tube attached to the inflator or air pump, that the said
nozzle will screw into the valve instead of over the same, and we provide a small
screw plug to fit therein and keep out dust and dirt when the tyre is in use.
We also make the valve spindle to project out into this open end of the valve so
that when the nozzle is screwed into the same it will push in the spindle and open
the valve. The spring which keeps the valve closed can therefore be made much
stronger than was formerly possible owing to the difficulty of overcoming the
spring by the action of the inflator alone especially when the tyre was almost
completely inflated. The end of the nozzle is notched or cut to allow of the
ingress of the air into the valve around the spindle.
Instead of closing the end of the spring box of the valve by a plate fixed into a
recess by spinning over or turning in a burr on the edge of the said recess, we now
close it by a screwed plug with a central hole through the same, and preferably
having its end coned or reduced to enter a short distance into the spiral spring to
ensure a free passage through the said plug.
Or we reverse the position of the spring box and valve seating, and we form a
head on the outer end of the valve spindle, and a screw thread on the inner end,
which we provide with a small washer or block of rubber or other suitable materiál
forming the valve proper and a screwed button forming a nut for securing the said
washer or block.
In this case the spring presses outwards against the head of the valve spindle
bringing the rubber or other washer or block tightly, against the seating, the
pressure of the air behind the button or nut being in the same direction.
The spindle is of sufficient length to allow the nozzle of the inflator as before
described when screwed into the valve to push against the head of the spindle and
press the same inwards thereby opening the valve ready for inflation.
Dated this 17th day of December 1892.
GEO! DAVIES & SON,
4. St. Ann's Square. Manchester. Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Valves for Pneumatic Tyres..
We Tом ROTHWELL and FRED ROTHWELL trading as The Eclipse Machine
Company of Viscount Street Rochdale Road Oldham, in the County of Lancaster,
Machine Makers do hereby declare the nature of this invention and in what
Pine 81

page_text: 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 which Letters Patent No. 1158 dated
21st day of January 1892 were granted to us, the objects of the present invention
being to improve the construction thereof and to make them more convenient
for use.
The nature of our said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the sheet of drawings hereunto annexed and the following explanation
thereof.
Fig. is a section through one of our improved valves, the valve being closed
or in its normal position when the tyre is in use, and
Fig. 2 a similar view when the valve is opened for inflation by screwing therein
the nozzle of the inflator.
Figs. 3 and
are similar views of a modification thereof.
Fig. 2 is a detached view of the nozzle shewing the cross cut or notch.
In the first place we so form the outer end of the valve tube at a and the
nozzle b of the adapter, or end of the tube attached to the inflator or air-pump
that the said nozzle will screw into instead of over the outer end a of the valve
tube and we provide a small screw plug or cap (not shewn on the drawing) to fit
therein or thereon and keep out dust and dirt.
We also make the valve spindle c to project out into this outer part of the
valve tube so that when the nozzle of the adapter is screwed into the same as
shown at Fig. 2 it will push in the valve spindle c and open the valve.
The spiral
spring d which keeps the valve closed can be made much stronger than was formerly
possible owing to the difficulty of overcoming the spring by the action of the
inflator alone, especially when the tyre became almost completely inflated.
The end of the nozzle is notched as seen at Fig. 24 or drilled through as seen
at Fig. 2B so as to allow of the ingress of the air into the space around the
spindle c.
Instead of closing the inner end of the spring box a¹ by a plate fixed into a
recess by spinning over or turning in a burr on the edge of the said recess as
formerly practised we now close the same by a screwed plug e with a central hole
through the same, and preferably having its end coned or reduced so as to enter a
short distance into the spiral spring d so as to ensure a free passage of air through
the said plug.
Or (as shown at Figs. 3 and 4) we reverse the position of the spring box and
valve seating and we form a head c' on the outer end of the valve spindle c and a
screw thread on the inner end, on which we place a small washer or block f of
india rubber or other suitable material (forming the valve proper) and we fix the
same by a screwed button g forming a nut for securing the said washer or
block f.
In this case the spiral spring d presses outwards against the head c¹ of the valve
spindle bringing the rubber or other washer or block f tightly against the seating,
the pressure of the air inside the tyre behind the button or nut g being in the same
direction.
The valve spindle c is of a sufficient length, to allow the nozzle b of the inflator,
as before described, to press against the head c' of the spindle and push the same
inwards against the resistance of the spring & thereby opening the valve ready for
inflation as seen at Fig. 4.
Fig. 4 is also a detached view of the nozzle as described with reference to
Figs. 3 and 4.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
The construction and adaptation to the valves for pneumatic tyres of the class

page_text: above referred to of the several improvements hereinbefore particularly described
and illustrated by the drawings annexed.
Dated this 15th day of September 1893.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.