Year: 1896

page_text: Date of Application, 28th May, 1896
Complete Specification Left, 27th Feb., 1897-Accepted, 8th May, 1897
Wе, JOHN РоMROY HITCHCOCк of 136 Great Saffron Hill, in the County of
Middlesex, Engineer, and JOHN DRING of 57 and 58 Chancery Lane, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows :-
This invention relates to valves chiefly for pneumatic tubes and tyres, and may be
carried out in the following manner;-
The valve body is adapted to pass through the air tube or tyre, and to be secured
thereto by a flat head and nut, the latter screwing on to the outside of the valve
body. The valve body is chambered and has an opening into the interior of the
tyre, and into the body fits a stem carrying a preferably rounded head, a hole
passing entirely through the stem. Over the head and taking a bearing upon the
neck between the head and a collar, which, with the assistance of a packing ring or
washer makes a tight joint in the valve body, is placed a strip of rubber or
equivalent with two holes in it; one end is first placed over the head and on to the
neck and the second end is then similarly placed, but folded so that a portion of
the rubber extends over the top of the head, closing the orifice through the stem. The
stem beyond the previously mentioned collar is screwed to receive the nozzle for
the air pump, and air being forced through the hole in the stem lifts the rubber
which forms the valve, and escapes past it into the interior of the body, and so into
the tyre; when the inflation ceases the rubber closes automatically upon the head
of the stem forming a non-return valve, the pressure of the air pussing it more
firmly.
For
We prefer to form a circular shoulder inside the valve body for the collar of the
stem to bear upon and a resist nut or cap screwing upon the thread upon the outside
of the valve body serves to securely hold the stem and body together.
deflation purposes this nut or cap may be slightly or partly unscrewed when the
joint between the stem and the valve body ceases to be tight, and the air can escape.
A second and preferably ornamental cap may be screwed on to the exposed end of
the stem, enclosing the first cap or nut if desired. Any or all of the nuts may be
provided with milled surfaces or flats, or other means of turning them.
Instead of the strips of rubber above mentioned other forms of valve may be used;
for example a piece of tube with a hole in one side slipped over the head of the
stem makes a good valve. Other modifications may be made.
Dated this 28th day of May 1896.
BOULT & WADE,
Agents for the Applicants.

page_text: Improvements in Valves, chiefly for Pneumatic Tubes and Tyres.
We, JOHN POMROY HITCHCOCк of 136 Great Saffron Hill, in the County of
Middlesex, and of Clairville, Addiscombe, County of Surrey, Engineer, and
JOHN DRING of 57 and 58 Chancery Lane, in the County of Middlesex, Engineer,
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, chiefly for pneumatic tubes and tyres.
In the accompanying drawings,
Figure 1 illustrates in a central longitudinal section and by way of example, one
construction of valve according to this invention.
Figure 2 being a transverse section on the line 2, 2 of Figure 1, as seen from the
underside; and
Figure 3 is a perspective view of a detail hereinafter referred to, drawn to a
larger scale than that of Figures 1 and 2.
Like letters indicate like parts throughout the drawings.
A is a valve body adapted to pass through the air tube or tyre, and to be secured
thereto by a nut B, which screws on the outside of the valve body as shown, and
compresses the material of the air tube in the space between it and the flanged
portion A¹ of the body, in a manner well understood. The valve body A is
chambered and has an opening A2 into the interior of the tyre; into the chambered
body fits a stem D, with a central longitudinal perforation D' and a rounded knob
or head D2
Over the head D' and taking a bearing upon the stem D, between the
head and a collar D³, is placed a strip of rubber or equivalent with holes in it, such
as a short rubber tube F, Figure 3, with a hole or holes F in it; each tubular piece
of rubber F is caused to assume and retain a proper position on the head by being
passed over it so that the head D2 goes through the hole F¹ and the unperforated
part of the tube fits close against the opening of the perforation D' on to the lower
surface of the head. In the example illustrated two of these tubular strips are thus
placed on the head D³ one after the other so as to occupy positions at right angles
to each other as indicated in Figure 2. Instead of these tubular pieces of rubber,
strips of sheet rubber perforated to engage with the stem D in like manner may be
employed; that is to say a short strip of rubber with a hole at each end can be
bent into circular form so that the holes coincide, the perforated ends being then
sprung in company over the head D to bring the unperforated central portion
against the bottom of the perforation D'.
The portion of the stem D beyond the collar D³ is screw-threaded to receive the
nozzle of the air-pump, and when air is forced through the hole in the stem it
forces the portion of rubber opposite the inner end of the perforation D' away from
that end and escapes past it into the interior of the body A, and so into the tyre by
way of the opening A2; when the operation of the pump ceases the rubber F closes
automatically upon the head D2 forming a non-return valve, kept tight by the
pressure in the chamber. The collar D with the assistance of a packing ring or
washer E makes a tight joint with the valve body A; there may be projections
from the collar D³ to enter recesses in the upper edge of the body A, or equivalent
devices to prevent the collar and stem D from being rotated. It will be seen that
there is a circular shoulder A³ inside the body A for the collar D and washer E to
bear upon, a nut or cap G is passed over the outer end of .he stem D and screws
upon the thread on the outside of the body to securely hold the stem and body
together and make a tight joint between the collar D³ and body A.
For deflation

page_text: this nut or cap E may be slightly or partially unscrewed when the joint between
the collar D and the valve body ceases to be tight and the air can escape. H is an
ornamental dust cap screwed on to the outwardly projecting end of the stem D and
enclosing the nut G. Inserted in the space I is a leather washer to make an
air tight joint with the end of the stem D. Any or all of these nuts may be
provided with a milled surface or flats, or other means of turning them.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is ;-
1. In a valve, the combination with a body such as A. of a perforated stem such
as D, with a collar D³ upon it and a non-return device at its inner end, a washer E
and nut G, substantially as and for the purpose described.
2. In a valve of the kind described, a perforated stem D with a rounded head D²
and a piece or pieces F. of rubber extending across the head and engaging with
the stem above it, substantially as and for the purpose specified.
3. The combination and arrangement of parts constituting a complete valve
substantially as and for the purpose specified."
J. P. HITCHCOCK.
Boult & Wade,
Agents for the Applicants.
J. P. HITCHCOCK.
Boult & Wade,
Agents for the Applicants.