Improvements in or relating to the Construction of Wheels for Bicycles, Tricycles, and other Road Vehicles.
Year: 1891

page_text: Date of Application, 20th Apr., 1891
Complete Specification Left, 20th Jan., 1892-Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Construction of Wheels for
Bicycles, Tricycles, and other Road Vehicles.
JOHN PURSELL Merchant Rhynd Lodge Seafield Leith Scotland do hereby
declare the nature of this invention to be as follows:-
My invention has reference to and comprises a new mode of and means for
obtaining elasticity in the wheels of vehicles such as bicycles, tricycles and other
road vehicles, in which the structure will be less liable to accident or destruction
than the structure heretofore in use. According to my invention a tube made of
rubber or other suitable material filled with air or gas is placed at a point between
the hub or nave of the wheel and the circumference or periphery of the same.
Instead of this tube a solid or partly solid buffer made of rubber may be used. In
wheels as presently constructed the nave is connected with the circumference by
In my
wires or spokes and the elasticity is mainly derived from the outside tyre.
invention the wires from the hub are attached to a shield which has a concave
surface looking inwards that is towards the hub. Again the wires or spokes from
the circumference are attached to another shield which has a concave side looking
outwards that is towards the circumference. These two shields do not touch ench
other but are in proximity and so placed that the concave sides face each other,
forming a tube or easing in which the inflated tube or buffer rests and by which it
is protected. When a buffer or buffers are used which are of themselves sufficiently
rigid the casings may be dispensed with. The configuration of the elasticity
producing arrangement need not be circular in plan but may be either oval,
triangular or square or of other shape. In some cases it may be found preferable
to attach the wires or spokes, which proceed from the hub, to the shield or casing
nearest to it. And in like manner the wires or spokes which proceed from the
circumference may be attached to the shield nearest to it.
The novelty of this invention consists chiefly in so constructing a wheel that a
tube filled with air may be placed between the periphery and the hub.
Data in 10th day of til 1901
JOHN PURSELL.
COMPLETE SPECIFICATION.
Improvements in or relating to the Construction of Wheels for
Bicycles, Tricycles, and other Road Vehicles.
I JOHN PURSELL of Rhynd Lodge Seafield Leith in the County of Midlothian
Merchant 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 has reference to and comprises a new mode of and means for
obtaining elasticity in the wheels of vehicles, such as bicycles, tricycles and other
road vehicles in which the structure will be less liable to accident or destruction,
than the structure heretofore in use. According to my invention a tube made of
rubber or other suitable material filled with air or gas, is placed at a part situated
between the hub of the wheel and the circumference of the same. Instead of this
tube a solid or partly solid buffer made of rubber may be used. In wheels as
presently constructed the hub is connected with the circumference by wires or
spokes, and the elasticity is mainly derived from the outside tyre. In my invention
the wires from the hub are attached to a shield which has a concave surface looking
CD 17

page_text: inwards Fig. 1. D, that is towards the hub. Again the wires or spokes from the
circumference are attached to another shield, which has a concave side looking
outwards, Fig. 1. C that is towards the circumference. These two shields do not
touch each other, but are in proximity, and so placed that the concave sides face
each other forming a tube or casing in which the inflated tube Fig. 1. E or buffer
rests, and by which it is protected. When a buffer or buffers are used which are
of themselves sufficiently rigid the casings may be dispensed with. The shape of
the elasticity producing arrangement need not be circular in plan but may be oval,
triangular, square or of other shapes. In some cases it may be found preferable to
attach the wires or spokes which proceed from the hub to the shield or casing
nearest to it and in like manner the wires or spokes which proceed from the
circumference may be attached to the shield nearest to it. The shields may be
made with corrugations crosswise for the purpose of elongating the rubber air
tube so that its diameter may be thereby reduced before the pressure is fully
sustained by it.
Another advantage to be gained by means of the corrugations is that a proper
grip will be obtained for the purpose of propulsion.
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
To so construct a wheel that elasticity may be derived from a tube filled with
air placed at a part between the periphery & the hub, and which tube is in contact
with shields of metal or other suitable substance, one of which shields is connected
with the periphery, and the other with the hub by means of wires or spokes.
Dated this 19th day of January 1892.
JOHN PURSELL.