Improvements in Valves for Pneumatic Tyres and the like.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres and the like.
I, ROBERT ADAMS HALL, Schoolmaster, of 113, Brighton Grove, in the City and
County of Newcastle-on-Tyne, do hereby declare the nature of this invention
to be as follows:-
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My invention relates to valves for pneumatic tyres and other inflatable
articles and has for its object to provide a valve efficient in use and of simple
construction.
According to my invention I employ a tubular part communicating with the
air tube and secured thereto in the usual or any suitable manner. The outer surface
of this tubular part is screwed externally and adapted to receive a screwed tubular
valve carrying casing which latter has a reduced aperture or passage at part of its
length forming a seat for non return valve of conical or other suitable form whose
inner end or that part nearest the air tube is adapted when its casing is screwed up
to make an air tight joint by means of a washer or disc of leather or other suitable
The outer end
material with the outer end of the tubular part first referred to.
of the non return valve is connected by a spindle or projection passing through
the aperture or passage over which it is seated to a stop or disc of larger diameter
than the passage and arranged in an enlarged outer portion thereof which is or
may be that part of the valve casing which is screwed to receive the inflator
nozzle. This stop piece is screwed onto the extension of the valve or carries the
spindle or projection which screws into the valve head and the stop piece is
grooved, serrated or roughened or has or may have through apertures so arranged
as to allow the free passage of air to and from the non return valve but limits
the movement of the latter and enables it to be withdrawn from contact with the
end of the inner tubular part referred to for the purposes of inflation or deflation.
The action of my improved valve is as follows:-When it is desired to inflate
the air tube or the like to which the valve is attached the valve carrying part
is unscrewed a few turns removing the non return valve from contact with the open
end of the tubular part, then on application of the inflator the air passes the stop
piece, opens and passes through the non return valve (whose movement is limited
by the stop piece) and then into the air tube by the now open end of the tubular
part communicating with same.
The internal air pressure acts upon and closes the non return valve on the back
stroke of the inflator and when the latter is withdrawn the screwing up of the
valve carrying part causes the valve to again engage and close the end of the
inner tubular part at the same time pressing and securing the valve upon its outer
seat on the inflation passage thereby forming a double means for securing the air
within the tyre the screwed parts of the two casings being of sufficient length or
tightness of fit to prevent any escape or appreciable escape thereat during inflation
although suitable air tight washers may be provided if required. For deflation
the valve carrying casing is partly unscrewed as before and the stop piece is

page_text: depressed by the finger or any suitable instrument so as to move the non return
valve from its seat the air then escaping thereat and past the stop piece. A suitable
dust cap or protector is provided as usual.
PRYOR & HARVEY,
Agents.
Improvements in valves for Pneumatic Tyres and the like.
I, ROBERT ADAMS HALL, Schoolmaster, of 113, Brighton Grove, in the City and
County of Newcastle-on-Tyne, 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:-
My invention relates to valves for pneumatic tyres and other inflatable articles
and has for its object to provide a valve efficient in use and of simple construction.
In order that my invention may be fully understood and carried into practice,
I will explain it in reference to the accompanying drawings in which Fig. 1 is
a central vertical section representing a complete valve embodying my improve-
ments in the closed position; Fig. 2 is a similar view indicating the open position,
part of the valve being broken away; and Figs. 3 and 4 are respectively an
elevation and an underside plan of a detail hereinafter described.
A is a tubular part communicating with the air tube or inflatable receptacle
to which it is secured at one end in the usual or any suitable manner; the means
indicated at B in Fig. 1 are those generally used for attaching the valves of
pneumatic tyres. The outer surface of the free end of this part A is screwed to
receive an internally screwed tubular valve carrying casing C whose construction is
clearly illustrated in Figs. 1 and 2. From these figures it will be seen that the
casing Chas, at an intermediate part of its length, a reduced aperture or passage c
forming a seat for, and being controlled by a non-return valve D of preferably
conical form whose inner end, or that nearest the tyre or other article, is adapted,
when the casing C is screwed up, to make a tight joint with the adjacent or
outer end of the part A by means of a flexible washer d which may conveniently
be situated within a recess at the end of the valve as illustrated. The outer end
of the valve D is connected by a spindle or projection d, passing through the
aperture or passage c, to a stop-piece or disc d² of larger diameter than the small
end of the said passage or aperture and arranged in an enlarged outer portion c¹
of same so that it may reciprocate freely therein in a longitudinal direction.
Thus the stop-piece limits the movement of the valve 1 from its seat in the
casing C by coming in contact with the contiguous end of the passage or
aperture c, but enables it to be withdrawn from the end of the part A for the
purposes of inflation and deflation on the operation of the casing C furnished with
a milled rim or head 2 for the purpose.
The portion c¹ is screwed externally to receive the inflator nozzle and the
usual dust cap c³ as shown in Fig. 1.
The spindle d may be integral with the valve D and have the stop-piece
screwed to it; or, according to the example, the spindle may be in one with the
stop-piece and screwed into the valve D. The stop-piece d² is grooved,
provided with holes or otherwise arranged to allow the free passage of air when
it bears upon the end of the passage c; to this end, in the drawings (specially
Figs. 3 and 4 which represent the stop-piece with part of the spindle d¹)
grooves d³, d³, d³ are exemplified.

page_text: Having in the preceding described my improved valve, I will now explain its
action which is as follows:-
Assuming the valve is closed as in Fig. 1 and it is desired to inflate the
article, either before or after removing the cap and fitting the inflator to the
portion cl, the casing C is unscrewed a few turns thereby removing the valve D
from contact with the part A as indicated in Fig. 2. Then, on the operation of the
inflator, during the forward-stroke the air passes the stop-piece &, and opens and
flows past the valve D (whose displacement is determined by the stop-piece as
aforesaid and as will be seen from Fig. 2) into and through the part A to the
article. Return of the air is prevented on the back-stroke of the inflator, because
the pressure within the article acts upon the valve D to close the passage c
until the next forward-stroke. In this way inflation is effected and when com-
pleted the casing C, prior to the detachment of the inflator and fitment of the
cap 3, is screwed up, thus causing the washer d to abut upon and close
the end of the part A and at the same time pressing and securing the valve D
upon its seat at the passage c, consequently leakage is doubly prevented.
For deflation, the cap is removed and the casing C is unscrewed as before
and the stop-piece d² next depressed by the finger or any suitable instrument so
as to move the valve D from its normal position, whereupon the air can escape past
both valve and stop-piece.
The various parts may be made of brass or other metal, while the washer d
may be of leather or other suitable material.
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
I claim is:-
-
1. A valve for pneumatic tyres and the like, arranged, constructed and adapted
for use, substantially as described and shown in the accompanying drawings.
2. In valves for pneumatic tyris and the like, the combination with an ex-
ternally screwed tubular part communicating with and secured to the inflatable
article, of a casing containing, a non-return valve attached to a grooved or
perforated stop-piece, all arranged and operating substantially as and for the
purposes hereinbefore described in reference to the accompanying drawings.
Dated this 12th day of July 1899.
For the Applicant,
J. A. HARVEY,
Chartered Patent Agent, 3, St. Nicholas' Buildings, Newcastle-on-Tyne.
J. A. HARVEY,
Chartered Patent Agent, 3, St. Nicholas' Buildings, Newcastle-on-Tyne.