Improvements in Apparatus for Inflating Pneumatic Tyres and for other similar purposes.
Year: 1898

page_text: Date of Application, 8th Sept., 1898
Complete Specification Left, 8th June, 1899-Accepted, 8th Sept., 1899
Improvements in Apparatus for Inflating Pneumatic Tyres and for
other similar purposes.
I, CHARLES HENRY WADE, of Greenway, Cockington, Torquay, in the County
of Devon, Surgeon, do hereby declare the nature of this invention to be as
follows: --
This invention consists of a device whereby the charging of a cylindrical
tuberlar pump of special construction with carbonic acid or other suitable gas
under considerable pressure is facilitated. The pump consists of a steel or other
metalic cylinder of size in accordance, with the use it is intended to serve one
end of which is tapered and fitted with a screw valve for the escape of the
contained compressed gas; the other end is fitted with an apparatus in which a
cartridge filled with compressed carbonic gas (or other) gas is introduced and by
the movement of a screw thread is drawn down upon a perforated nipple having a
piercing pin point. The compressed gas in the cartridge is thus liberated and
fills the pump cylinder and can be allowed to escape from the latter through
the screw valve at the neck as required to inflate wheel tyres, footballs,
cushions &c.
Dated this 7th day of September 1898.
PHILLIPS & LEIGH,
Agents for the Applicant.
Improvements in Apparatus for Inflating Pneumatic Tyres and for
other similar purposes.
I, CHARLES HENRY WADE, of Greenway, Cockington, Torquay, in the County
of Devon, Surgeon, 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 improvements in apparatus for inflating pneumatic
tyres and for other similar purposes and consists of a device whereby the
charging of a cylindrical tubular retort or case of special construction with
carbonic acid gas or other suitable gas or gases under considerable pressure is
facilitated. This tabular retort may be employed as an inflator for various
articles such as cycle tyres foot-balls, air-cushions and the like, and such an
inflator consists of a strong cylinder of steel or other suitable metal or material
of a size in accordance with the use it is intended to serve, say for example about
six inches long and one and a half inches inside diameter; these being suitable
[Di Q71

page_text: dimensions for a steel inflator for a cycle tyre. One end of this cylinder is
tapered and fitted with a screw valve for the escape of the contained compressed
gases. The other end is fitted with an apparatus in which a cartridge or small
case filled with compressed or liquified carbonic acid gas or other suitable gas is
introduced, and by the forward movement of a screw-threaded cap having a
central stump is impelled forward against the sharp point of a nipple which is
perforated with a central hole leading into its interior, said nipple projecting from
the rear extremity of the expansion chamber or forward part of the outer
cylinder.
'
I will now proceed to describe the invention with the aid of the accompanying
drawings.
Figure 1 is a longitudinal section through the entire inflator, the cartridge
however remaining in elevation; and
Figure 2 is a similar longitudinal section, the cartridge and piercing point
being also in section,
66
According to my invention an outer cylinder a of steel or other suitable
metal or material is provided at one end with a valve b. The said cylinder has a
hemispherical web e formed within it, constituting the rear end of the expansion
chamber d, and on the centre of this web is formed or fixed a sharp pointed
nipple e having a central hole through it leading into the interior of the expansion
chamber d. To fit on the end of the outer cylinder is provided a cap f rendered
adjustable longitudinally, for example by means of screw-threading the cylinder
as at g and
tapping" the inside of the cap to engage therein. This cap is
preferably provided with a central stump h which serves to push the cartridge
forward as the cap is being screwed on. This cap may also with advantage be
provided with wings such as i, i to facilitate turning it by hand, is the
cartridge which consists of a small case capable of containing liquified carbonic
acid or other gas and preferably of the form shown. The forward end of the
cartridge is made of, or stopped with a plug of soft metal or other equivalent m,
which can be pierced on pressure against the nipple e.
The expansion chamber d may be separate and removable from the outer shell
in the same manner as the cartridge, for inspection, repair or renewal.
The operation of the invention is as follows:
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The valve bis, shut, gas-tight...The closing-cap f is removed and a cartridge
charged with liquified carbonic acid gas or other suitable gas or gases, and the
closing-cap screwed on; the screwing on and consequent gradual advance of the
stumph against the rear end of the cartridge j, impels the latter forward against
the piercing point of the nipple e on the end of the expansion chamber d. This
nipple pierces the soft plug m in the end of the cartridge and thus liberates the
contained gas or gases, which thereon pass into the expansion chamber d through
the hole in the nipple e and from there the gas may be served through the valve.b
as required, either direct or through connecting conduits into the tyre, football,
cushion or other article it is desired to inflate. It will be understood that the
pressure of. the gas contained in this inflator is the means by which the gas is
forced into the article being inflated, and thus it takes the place of the usual hand
or foot power expended in working a pump.
I am aware that retorts or cylinders having a valve at one end and charged
with compressed gas have already been proposed, but these are subject to the
inconvenience of necessitating their return to the factory to be recharged; whilst
if constructed as I now propose, several of the cartridges could be carried in the
pocket or wallet and introduced in the inflator as and when required for use,
thus rendering the contrivance much more handy and cheaper to maintain.
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. An inflator for cycle tyres, footballs, cushions and other articles, consisting.

page_text: of a cylinder temporarily closed at one end by a removable cap, and at the other
by a valve, the interior of said cylinder being divided into two compartments one
being empty and provided with an external point and the other containing a
removable pierceable cartridge charged with a gas under considerable pressure,
substantially as described and set forth.
2. In an inflator for cycle tyres, footballs, cushions and other articles, the
combination with a cylinder or bottle for containing a gas under considerable
pressure and having a valve at one end, of an internal enclosed expansion
chamber either integral with or fitted removably in said cylinder, a piercing point
at the extremity of said chamber a second chamber open at one end, a pierceable
cartridge filled with gas under considerable pressure loosely placed in said chamber
and a longitudinally adjustable cap for closing the cartridge chamber and
advancing the cartridge, substantially as described and set forth.
Dated this 8th day of June 1899.
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.