Improvements in the Wheels of Cycles and such like Vehicles.
Year: 1891

page_text: Date of Application, 9th Nov., 1891
Complete Specification Left, 9th Aug., 1892-Accepted, 10th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Wheels of Cycles and such like Vehicles.
I, WILLIAM ERSKINE BARTLETT, of 21 Buckingham Terrace, Edinburgh,
Managing Director of the North British Rubber Company Limited, do hereby
declare the nature of this invention to be as follows:-
These improvements relate to wheels provided with what are known as pneumatic
tyres such as those described in the Specification 16783 of 1890. Instead of or
in addition to the outer band or cover for the protection of the air tube from
injury as therein described I employ a cover or jacket encircling the air tube.
This cover by the expansion of the air tube is pressed against the bottom or crown
of the arched metal rim as well as against the sides thereof, and is preferably
formed with eyelets on the inner edges so that it may be laced round the air
tube and easily removed therefrom for repairs. This cover or jacket is formed
of cloth and india rubber and consequently has its expansion limited, and being
made to encircle the air tube the latter can be made of solid india rubber, that
is, of rubber without cloth, and therefore susceptible of large expansion whereby
very close fit can be more readily obtained than with an air tube made of cloth
and india rubber and therefore of limited expansion. Furthermore an air tube
made of solid india rubber can generally be more easily repaired than one made of
combination of cloth and rubber.
The most convenient form of metal rim for such an arrangement is one bent
in the form of an arch with edges turned inwards and the bend rounded to avoid
injury to the cover or jacket, and also to form a dovetail or contraction in width
for greater security in holding the pneumatic tyre in the rim without the use of
cement or fastening other than the air tube expanded by internal air pressure
against the metal rim. The air tube is formed with a filling tube and valve in
the ordinary way.
Dated this 0th day of Novonshor 1901
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in the Wheels of Cycles and such like Vehicles.
I, WILLIAM ERSKINE BARTLETT, of 21 Buckingham Terrace, Edinburgh,
Managing Director of the North British Rubber Company Limited, 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 :-
These improvements relate to wheels provided with what are known as pneumatic
tyres such as those described in the Specification 16783 of 1890. Instead of or in
addition to the outer band or cover for the protection of the air tube from injury
as therein described I employ a cover or jacket encircling the air tube. This cover
by the expansion of the air tube is pressed against the bottom or crown of the
arched metal rim as well as against the sides thereof, and is preferably formed
with eyelets on the inner edges so that it may be laced round the air tube and easily
removed therefrom for repairs. This cover or jacket is formed of cloth and india
rubber and consequently has its expansion limited, and being made to encircle the
air tube the latter can be made of solid india rubber, that is, of rubber without
cloth, and therefore susceptible of large expansion whereby a very close fit can be

page_text: more readily obtained than with an air tube made of cloth and india rubber and
therefore of limited expansion. Furthermore an air tube made of solid india
rubber can generally be more easily repaired than one made of a combination of
cloth and rubber.
The most convenient form of metal rim for such an arrangement is one bent in
the form of an arch with edges turned inwards and the bend rounded to avoid
injury to the cover or jacket, and also to form a dovetail or contraction in width
for greater security in holding the pneumatic tyre in the rim without the use of
cement or fastening other than the air tube expanded by internal air pressure
against the metal rim. The air tube is formed with a filling tube and valve in the
ordinary way.
The drawing Figure 1 shows a transverse section of a rim and tyre constructed
according to this invention.
Figure 2 shows the lacing of the cover.
a is the rim b the outer band. e the cover having eyelet holes c¹ in its edges
which are connected together by a lace c² and d is the internal air tube.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is-
1. The combination of a rim of arched or trough section, an inflated tube
within the arch and a cover around the inflated tube having its edges secured
together and pressed by the air within the tube against the bottom and sides of
the arch substantially as described.
2. The combination with the arrangement referred to in the preceding claim
of an outer band, substantially as described.
3. Wheels of cycles and such like vehicles substantially as described and shown
in the drawing.
Dated this 30th day of July 1892.
WM. E. BARTLETT.