Improvements in or connected with Yielding Tyres for Bicycles, Tricycles, Go-carts, and like Vehicles.
Year: 1890

page_text: Date of Application, 7th Aug., 1890
Complete Specification Left, 4th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in or connected with Yielding Tyres for Bicycles,
Tricycles, Go-carts, and like Vehicles.
I, GORDON MCDONALD, of 27 Milton Street, City of London, Manufacturer of
Fancy Goods, do hereby declare the nature of this invention to be as follows:-
This invention has for object, the employment of tubular rubber, or compound
rubber, or rubber with canvas, or tape lining, and charged with cork, rubber sponge,
or other solid, semi-solid, or compact body or material having yielding and
rebounding properties, as tyres for vehicles.
Where the tyre is subject to great friction, or undue wear, the outer skin can be
made thicker.
Thind hi
COMPLETE SPECIFICATION.
Improvements in or connected with Yielding Tyres for Bicycles,
Tricycles, Go-carts, and like Vehicles.
I, GORDON MCDONALD, of 27 Milton Street, City of London, Manufacturer of
Fancy Goods do 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 :-
This invention has for object the employment of tubular rubber or compound
rubber, or rubber with canvas or tape lining and charged with cork, rubber sponge
or other solid, semi solid or compact body or inaterial having yielding and rebounding
properties as tyres for vehicles.
Where the tyre is subject to great friction or undue wear the outer skin can be
made thicker.
The annexed drawings will enable my invention to be understood.
Figure 1 Transverse section of tyre composed of rubber tube A filled with
rubber sponge B, the thickness of the tube A being equal all round.
Figure 2 Similar section of rubber tube A, rubber sponge B, the tube A being
of increased thickness at the tread or part most subject to wear.
Figure 3 Similar section of rubber tube A of oval shape with side grooves CC
for grip of rim, said tube A being filled with rubber sponge.
Figure 4 Transverse section of rubber tube A with canvas liner D and filled
with rubber sponge B, the tube A being of equal thickness.
Figure 5 Similar section of canvas lined rubber tube A of unequal thickness
and filled with rubber sponge B.
Figure 6; Similar section of rubber tube A filled with cork dust, saw dust or
other material of a like character, or a flocculent, or a fibrous material in shreds
incorporated with a compound of gelatine and glycerine having yielding rebounding
properties to ensure the efficiency of resilliency in the tyre.
Figure 7 Similar section of rubber tube A charged with cork E.
Figure 8 Similar section of rubber tube A filled with ring shaped or hollow
cork near the tread only embedded in and containing rubber sponge or a

page_text: compound of gelatine and glycerine; the filling of the cork E may be dispensed
with if desired.
Figure 9; Similar section of rubber tube A with cork E touching the inner wall
of the tube at all parts, said cork is shown hollow but it may be solid; if hollow it
can be charged with any resillient material.
Figure 10; Similar section of tube tyre A with core of cork E or other material
having yielding and rebounding properties, the space between the tube A and the
cork E being charged with a compound of gelatine and glycerine or their equivalents
indicated by F.
The fillings in of rubber tyre tube hereinbefore referred to are only examples of
my invention of filling rubber tyres of wheels of bicycles, tricycles, go-carts and
like vehicles with a body or material having yielding and rebounding properties.
I am aware that rubber tube tyres for vehicles above mentioned have been charged
with air, with liquid, also with steel springs, and with other solil material, but
these form no part of my invention as I desire to limit myself to the employment of
cork, solid, hollow, or granulated, alone or in combination wit': a semi solid
substance such as gelatine and glycerine, or a rubber sponge as hereinbefore
mentioned.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:
1. The use or employment of cork in dust or other form as a lining or padding
for supporting the inner walls of tube tyres for bicycles, tricycles, go-carts and like
vehicles in the manner set forth.
2. The employment or use of rubber sponge in the interior of rubber tube tyres
for bicycles, tricycles, go-carts and like vehicles for the purpose or purposes set
forth.
3. The use or employment of a semi-solid compact body such as a compound of
gelatine and glycerine alone or in combination with cork dust, saw dust, or it may
be a light fibrous material (flocculent or other) to constitute a filling to a rubber
tube tyre for a bicycle, tricycle, go-cart or like vehicle, as set forth.
The 4th day of May 1891
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Gordon McDonald.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Gordon McDonald.