Improvements in Wheels for Bicycles, Tricycles, Perambulators, and other Vehicles.
Year: 1892

page_text: Date of Application, 28th June, 1892
Complete Specification Left 28th Mar 1893-Accepted. 29th Apr. 1893
PROVISIONAL SPECIFICATION.
Improvements in Wheels for Bicycles, Tricycles, Perambulators, and
other Vehicles.
I JOHN ROBERT EARNSHAW of 4 Chapel Walks, Manchester Architect, do
hereby declare the nature of this invention to be as follows, viz. :—
The construction of a compound or double tyre composed of an inner and
outer tyre, concentric and in the same plane, and connected by springs; such com-
pound or double tyre being used for the wheels of bicycles, tricycles, perambulators
or any other carriages or conveyances on wheels.
Fig. 1 on the drawing is an elevation of a wheel fitted with the compound or
double tyre.
Fig. 2 is a full sized elevation of part of the said tyre; A being the inner tyre to-
which the spokes of the wheel are fastened.
B is the outer tyre, and is only attached to the inner tyre by the-
springs C. C. C.
COMPLETE SPECIFICATION.
Improvements in Wheels for Bicycles, Tricycles, Perambulators, and
other Vehicles.
I, JOHN ROBERT EARNSHAW of Chapel Walks, Manchester, Architect, 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:
The object of this invention is the construction of a compound or double tyre.
composed of an inner and outer tyre concentric and in the same plane, and connected
by springs of indiarubber or spiral steel in tension fixed diagonally and attached to
the inner and outer tyres by hooks which can be easily and quickly attached to.
and detached from the said inner and outer tyres.
Sheet 1 contains an elevation one sixth full size of a wheel fitted with the com--
pound or double tyre.
Sheet 2 contains (Fig. 1) a full size elevation of part of the said tyre; (Fig. 2)
a transverse section of the same with indiarubber spring attached; (Fig. 3) a trans--
verse section of the same with steel spiral spring attached; and (Fig. 4) a transverse
section of the saine with the hooks A. A. turned at right angles to the plane of the-
wheel, showing how the springs can be removed and replaced.
The wheel itself, i.e. the axle, steel wire tension spokes, and inner tyre, can be
made in the ordinary way, as also the outer tyre which may or may not be made.
hollow, and which may contain an indiarubber tyre as shown."
The hooks A. A. are so secured to the inner and outer tyres that they can be
turned round on their own axes. Thus when the hooks are turned as shown in
Fig. 4 Sheet the springs can be at once attached, when they (the springs) will
automatically pull the hooks round into the position shown in Figs. 1, 2 & 3 Sheet 2,
and retain them in that position so that the springs cannot come off or be taken off
except by giving the books a quarter turn and bringing them again into the position
shown in Fig. 4 Sheet 2.
The compound or double tyre as thus constructed possesses extreme elasticity; it
is so simple that any one can repair it; & it is incapable of injury by cutting,.
nunoturing ba

page_text: 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,―
1st. The diagonal arrangement of the springs which do not radiate from the
centre of the wheel;
2nd. The construction of the hooks A. A. which can be so turned that the springs
can be immediately released & replaced, as herein before described and illustrated
on the accompanying drawings.
Dated this 9741. JM 100°
J. R. EARNSHAW.