Improvements in or additions to the Metallic end Fittings of Flexible connections for Air-pumps.
Year: 1897

page_text: Date of Application, 22nd Nov., 1897
Complete Specification Left, 3rd Mar., 1898-Accepted, 23rd Apr., 1898
PROVISIONAL SPECIFICATION.
Improvements in or additions to the Metallic end Fittings of
Flexible connections for Air-pumps.
I, CHARLES THOMAS BROCK SANGSTER, Works Manager to the Cycle Components
Manufacturing Company, Limited, of Bournbrook, near the City of Birmingham,
do hereby declare the nature of this invention to be as follows:-
This invention relates to the metallic end fittings of flexible connections for
air pumps or pneumatic tyre inflators. Heretofore, these metallic end connections
have been secured to the ends of the flexible rubber tubes of inflators, by wiring,
or by a closed on band of metal having a part tucked in or turned over, so as
to force the rubber walls of the tube into annular ratchet formations on the tail
ends of the said connections or fittings.
By my invention, a neater and more efficient connection is made by simply
enclosing the end of the tube by a ferrule or a cupped ferrule having a hole in
its closed end of the same diameter as the tail part of the metallic end fitting.
In carrying out my invention, I take an ordinary metallic end valve fitting,
having an adapter or not, as may be necessary, and a middle body part or
shoulder with a tail end having annular ratchettings with the ratchets raking
downwards and inwardly so as to present or form a series of shoulders at the
front of each taper ratchet.
The end of the elastic or other flexible tube has a cupped ferrule, with a hole
through its middle of the same size as the ratchet tail end. This cup fits tightly
onto the rubber tube, which has a small axial hole up its middle.
The ferrule forms a confiner or box for the rubber tube so that when the
axially bored tail is passed through the eye of the cup, and forced home into the
bore of the tube, the rubber walls of the end of the said tube are compressed
between the confining ferrule and the tail end, with the shoulders fully or com-
pletely embedded in the rubber, the annular shoulders forming a series of stops
against the withdrawal of the tail end. When pull is put upon the connected
parts, the union becomes tighter owing to the annular shoulders or collars termin-
ating each inclined annular ratchet forcing or compressing the rubber laterally
and thereby by the squeezing, and wedge the same between the said tail end and
the inside walls of the ferrule, which if necessary may be creased either helically
or annularly to enhance as grip upon the tube end.
I wish it to be understood that I do not confine myself to any particular form
of ferrule, shoe or supplementary confining shell end, nor do I confine myself
to the exact configuration of the tail of the fitting, as these details may be varied
without departing from the nature of my invention.
Dated this 20th day of November 1897.

page_text: Improvements in or additions to the Metallic end Fittings of
Flexible connections for Air-pumps.
I, CHARLES THOMAS BROCK SANGSTER, Works Manager to the Cycle Components
Manufacturing Company, Limited, of Bournbrook, near the City of Birmingham,
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 the metallic end fittings, commonly known as adapters,
of flexible connections for air pumps or pneumatic tyre inflators. Heretofore,
these metallic end connections have been secured to the ends of the flexible rubber
tubes of inflators, by wiring, or by a closed on band of metal having a part tucked
in or turned over, so as to force the rubber walls of the tube into annular ratchet
formations on the tail ends of the said connections or fittings.
By my invention, a neater and more efficient connection is made by simply
enclosing the end of the tube by a ferrule or a cupped ferrule, which takes onto
the end of the flexible dip tube and has a hole in its closed end of the same
diameter as the tail part of the metallic end fitting or adapter to be secured to
the said tube.
Figure of the accompanying drawing represents an elevation of the flexible
connection tube of a pneumatic tyre inflator, with the metallic end fittings or-
adapters secured by cupped ferrules according to my invention.
Figure 2 is a section, upon an enlarged scale, of one end.
Figure represents, partly-in elevation and partly in longitudinal section, the
said connection, with its end fittings and securing ferrules, disassembled or
separated from one another..
Figure 4 represents, partly in elevation and partly in section, the flexible
connection, with the cupped ferrules or end caps in position thereon, but prior
to the tail end parts of the adapter fittings being forced into the bore of the said
connection.
Figure 5 is a section of Figure 4 upon the dotted line X, and
Figure 6 is a plan of one of the ferrules or caps, separately.
The same letters of reference indicate corresponding parts in the several figures
of the drawing..
In carrying out my invention, a, a¹, are ordinary metallic adapters or flexible
connection end fittings, each comprising a middle body part or shoulder a³, with
a tail end a³, having annular ratchettings or angular ribs a, throughout its
length with the ratchets raking downwards and inwardly so as to present or form
a series of shoulders at the front of each taper ratchet.
Each end b¹, of the elastic or other flexible tube b, is provided with a cupped
ferrule c, with a hole c¹, through the middle of its outer end, of the same diameter
as that of the largest parts or shoulders of the ratchet tail ends. This cup fits
tightly onto the rubber tube, which has a small axial bore or air passage 62, up
its middle.
The ferrule forms a confiner or box for the rubber tube so that when the axially
bored tail is passed through the eye of the cup, and forced home into the bore.
of the tube, the rubber walls of the end of the said tube are compressed between
the confining ferrule and the tail end, with the shoulders fully or completely
embedded in the rubber, the said annular shoulders forming a series of stops
against the withdrawal of the tail end. When-pull is put upon the connected
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page_text: parts, the union becomes tighter owing to the annular shoulders or collars termin-
ating each inclined annular ratchet forcing or compressing the rubber laterally
and thereby, by the squeezing, wedging the same between the said tail end and
the inside walls of the ferrule, which if necessary, may be creased either helically
er annularly to enhance its grip upon the tube end.
I wish it to be understood that I do not confine myself to any particular form
of ferrule, shoe or supplementary confining end, nor do I confine myself to the
exact configuration of the tail of the fitting, which may be annularly or otherwise
grooved or provided with ribs, projections or equivalent formations of any suitable
section.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
In the metallic end fittings of rubber or like flexible connections of pneumatic
tyre inflators or air pumps, the combination with adapters or connection fittings
having annular or other groove serrations, ratchet-ribs or equivalent formations
on their tail ends, of ferrules or cupped ferrules placed onto the ends of the
flexible tube, substantially as and for the purpose described and set forth.
Dated this 2nd day of March 1898
CHARLES THOMAS BROCK SANGSTER,
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.