Improved Pneumatic Nave for Cycle and other Wheels.
Year: 1893

page_text: Date of Application, 30th May. 1893
Complete Specification Left. 28th Feb. 1894-Accepted. 25th May, 1894
PROVISIONAL SPECIFICATION.
Improved Pneumatic Nave for Cycle and other Wheels.
I THOMAS FOWLER EZARD 60 Market Place Driffield in the County of York
do hereby declare the nature of this invention to be as follows:-
An inner cylinder the width of the wheel, through which the axle passes, and an
outer cylinder the width and diameter of the nave required. This cylinder will
carry a spoke rim at each end or in the centre. The whole of the circular space
between the two cylinders will be filled by an inflated air cushion in one or more
separate tubes or compartments according to the width of the nave or the purpose
for which it is required. The wheel will be stiffened and held in position by
sliding flange on each end of the nave arranged so as to give full play to the spring
of the air cushion, the inner and outer cylinders may be connected by direct spiral
springs at each end of the nave.
Dated this 29th day of May 1893.
a
THOMAS FOWLER EZARD.
COMPLETE SPECIFICATION.
Improved Pneumatic Nave for Cycle and other Wheels.
I THOMAS FOWLER EZARD, of 60 Market Place Driffield, in the County of
York Jeweller, do hereby declare the nature of my said invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
My present invention relates to the naves of cycles and other wheels and has for
its object to so construct the same that vibration is reduced to a minimum to attain
which I employ an arrangement as set forth in the accompanying sheet of drawings
which are to be taken as part of the Specification and read therewith.
Fig. 1 is a sectional elevation of nave of wheel arranged with my improvements
and Fig. 2 is a similar sectional elevation of a modification of my invention and
Fig. 3 is a side view of a guide I prefer to use with the modification shown at
Fig. 2.
Similar letters of reference denote corresponding parts in each view.
Referring to Fig. 1, I arrange an inner cylinder A which is the width of boss of
wheel through which I fit or pass the axle B. The said inner cylinder A is screwed
to two flanges C and over the said cylinder AI fit or place an annular air or
inflated rubber bladder or cushion D which has preferably an outer casing of
leather or canvas and may be secured to the inner tube A by metallic rings d', and
the said bladder D may be inflated through the hole d³ by means of an air pump in
a well known manner.
Over the air cushion D I arrange an outer cylinder E having rims e¹ for the
reception of the wheel spokes.
The wheel may be driven by the chain wheel e' arranged on one side of said
rims el.
The whole of the space between the cylinders A and E being filled up by the
inflated cushion D vibration to the vehicle carried upon my improved wheel or wheels
is reduced to a minimum.

page_text: Referring to Fig. 2, I arrange the flanges C to come within the hubs e¹ of wheel
and this enables a smaller driving chain wheel to be employed.
I have found it advisable in order to prevent the driving chain being thrown off
the driven wheel when riding to employ a guide G which I fit over a number of
ruuners g fixed to the flange of the chain wheel and the said guide G is made
with a part and is left free to accommodate itself to the spring or movement
of the nave, but I do not claim this guide G or its runners as any part of my
Patent.
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:
1. In pneumatic naves for cycles and other wheels the combination of an inner
cylinder A containing the axle and a free outer cylinder E containing the hubs
with an intervening inflated cushion D all arranged substantially as described and
illustrated.
Dated this 22nd day of February 1894.
H. F. BOUGHTON,
Agent.