Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c. Act, 1883) as allowed
by the decision of the Comptroller General of the 21st day of June 1898.
I, ALFRED PEARSE, of the Close, Flitwick, Bedfordshire, Artist, do hereby
declare the nature of this invention to be as follows:-
My invention relates to improvements in wheels for cycles and vehicles whereby
the communication of the vertical vibration due to the passage of the wheel over
uneven or irregular surfaces, is minimised.
My invention consists in various details of construction in the application of
a pneumatic or air tube or solid india-rubber interposed immediately around
the hub of the wheel, so that the vertical vibration of the wheel communicated
to the outer periphery of the hub, is absorbed in the resilience of the interposed
pneumatic tube or other element, and is not communicated but in a slight re-
action to the hub proper to which the spindle of the wheel and frame of the
machine are secured and from which it is supported.
In corrying my invention into effect as applied to a cycle wheel, I provide a
hub approximately of a width corresponding to that of an ordinary cycle wheel,
which hub is provided with a vertical Hange at each end which serve to retain
in position a pneumatic or air tube or solid rubber which is placed thereupon
and which is either sprung into position or otherwise placed thereon, one of the
vertical side flanges being provided so as to be capable of being unscrewed and
after the placing of the tube in situ is screwed against the lateral face thereof.
When applying a pneumatic tube I form the tube of a peculiar configuration
having an arched periphery approximately semicircular in section and having its
sides provided with a greater thickness of rubber, so that a greater resistance
may be provided at the lateral extremities to the vertical vibration of the wheel.
The wheel is formed with an outer hub to which the spokes are preferably laced
in the usual manner as to an ordinary hub. This outer hub, however, is made of
a form corresponding to that of the pneumatic tube being provided as a peri-
phoral arch and a sectional form approximately semicircular. This outer hub
is provided with vertical side terminal flanges which embrace the sides of the
tube, the tube being formed laterally with a flat surface upon each side, so that
the bearing may be provided for the outer hub contiguous to the lateral thickened
walls of the tube.
For the purpose of supporting the sides of the tube against lateral stress and at
the same time to secure the utmost vertical play, I provide the opposed vertical
flanges of the hub and outer hub of a serrated form, the projecting portion of
one Hange opposing a corresponding recess in the other.
I preferably form the bed of the hub proper slightly hollow so as to allow the

page_text: greatest height or diameter of the annular chamber in the centre line of the tube.
It is obvious that I may form the hub of any usual form with ball races upon
aither side for the easy rotation of the wheel.
In carrying my invention into effect according to another modification, I
provide the pneumatic tube of a peculiar sectional configuration and of a compara-
tively large diameter so as to allow of its sides being compressed. In this case
I provide the hub with lateral flanges of peculiar form, one flange being prefer-
ably fixed to the hub, while the other is capable of being screwed or forced for
compressing the pneumatic tube or disc. The sides of these lateral flanges are
provided at their outer extremity upon an inclination from within upwardly on
each side so that when brought together opposing inclined faces are formed
which support the sides of the tube, while the extremities in contiguity with
the hub are at an opposite inclination, so that on the two flanges being brought
together the lower portion of the pneumatic tube is compressed or closed within
a recess. The lateral flanges are perfectly enforced with a greater thickness
of at the meeting of the oppositely in-clined surfaces so as to resist stress tending
to bend downwardly. In operation the tube is placed upon the hub and forced
up against one of the lateral flanges by the other which is screwed upon the
hub or which is forced by a screwed uut into position. The wheel which is
preferably formed with an outer hub of an arched configuration is mounted in
aligument over the tube, and the tube is then inflated.
The sides of the pneumatic tube or disc at that part between the extremities
on either side of the lateral flanges and the respective extremities of the outer
hub, is enforced by additional thickness of material to augment the resistance to
vertical vibration.
It will be seen that in the employment of this latter construction a compara-
tively great area of compressed air is provided, while the lateral inclined faces of
the enforced walls of the tube with its secondary inuer annular chamber of air
affords an effective resilient resistance to the vertical vibration of the wheel.
Dated this 19th day of November 1896.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
1, ALFRED PEARSE, of the Close, Flitwick, Bedfordshire, Artist, do hereby
declare the nature of this invention aud in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to improvements in wheels for cycles and vehicles whereby
the communication of the vertical vibration due to the passage of the wheel over
uneven or irregular surfaces, is minimised.
My invention consists in various details of construction in the application of
apneumatic or air tube or chamber or solid india-rubber interposed immediately
around the hub or spindle of the wheel, so that the vertical vibration of the wheel
communicated to the outer periphery of the hub, is absorbed in the resilience of
the interposed pneumatic tube or chumber or other element, and is not communi-
cated but in a slight re-action to the hub proper to which the spindle of the wheel
and frame of the machine are secured and from which it is supported.

page_text: The accompanying drawings illustrate different methods of carrying my
invention into effect.
Figure 1 is a transverse vertical section of a cycle wheel with the improved
device applied.
Figures 2, 3, & 4 are details of the device shown on Fig. 1.
In carrying my invention into effect with reference to Figures 1, 2, 3, & 4 of
the drawings and as applied to a cycle wheel, I provide a composite or built up
hub approximately of a width corresponding to that of an ordinary cycle wheel,
which composite hub is provided with vertical flanges A, A', at each end of the
spindle B which serve to retain in position a pneumatic case or chamber C placed
thereupon.
The flange A is first fixed on the spindle B, then the case or chamber C is sprung
into position or otherwise placed thereon, and the second vertical side flange A
being provided so as to be capable of being screwed or otherwise fastened, is, after
the placing of the chamber C in situ, fixed or screwed against the lateral faces
thereof.
The pneumatic case or chamber C shown in detail on Figure 3, I form of a
peculiar configuration having an arched periphery approximately semicircular in
section and having its sides at E provided with a greater thickness of rubber, so
that a greater resistance may be provided at the lateral extremities to the vertical
vibrations of the wheel.
The cycle wheel l' is formed with an outer hub G to which the spokes are pre-
ferably laced in the usual manner as to an ordinary hub. This outer hub G,
however, is made of a form corresponding to that of the pneumatic case or cham-
ber C being provided as a peripheral arch and of a sectional form approximately
semicircular, this being shown in detail on Figure 2.
Having now particularly described and ascertained the nature of my said
invention and in what manuer the same is to be performed, I declare that what I
claim is:-
The composite or built up hub hereinbefore described with reference to
Figures 1, 2, 3, & 4 of the accompanying drawings.
Dated this 18th day of August 1897
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.