Improvements in and relating to Pneumatic or Air-inflated Tyres.
Year: 1891

page_text: Date of Application, 26th May, 1891
Complete Specification Left, 26th Feb., 1892-Accepted, 26th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic or Air-inflated Tyres.
I THOMAS DUNN of 83 Tierney Road, Brixton, in the County of Surrey, a
Member of the Stock Exchange, do hereby declare the nature of my said invention to
be as follows:-
My invention relates to the inner or inflation tube of pneumatic or air inflated
tyres, and it consists in the use for such inflation tubes of a length of gut in its
hollow state, the object being to obtain an air inflation tube less liable to puncture
or burst, and which is lighter than the tubes at present in use constructed of
rubber.
For my improved inflation tube I take a length of any suitable gut, prepared and
cleansed in the ordinary manner, and to make it soft and pliable, I tan it by any of
the known processes for producing leather without free grease, which leaves the
gut in such a state that its ends may be connected and fixed together by india
rubber cement.
When a single gut is not strong enough to stand the pressure these inflation tubes
are called upon to bear, I use two or more guts placed one within the other, or I
strengthen the one piece of gut by wrapping round it strips of gut made by splitting
open a piece of the hollow gut.
Dated this 26th dox of May 1891
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION
Improvements in and relating to Pneumatic or Air-inflated Tyres.
I THOMAS DUNN of 83 Tierney Road, Brixton, in the County of Surrey,
Member of the Stock Exchange, 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 relates to the inner or inflated tube of pneumatic or air inflated
tyres, and it consists in the use for such inflated tubes of a length of gut in its
hollow state, the object being to obtain an inner or inflated tube less liable to
puncture or burst under pressure and which is lighter than the tubes at present in
use constructed of rubber.
For my improved air tube I take a length of any suitable gut, prepared and
tan it by any
cleansed in the ordinary manner, and to make it soft and pliable
of the known processes for producing leather without free grease, which leaves
the gut in such a state that its ends can be connected and fixed together by
india rubber cement.
When a single gut is not strong enough to stand the pressure these air tubes are
called upon to bear, I use two or more guts placed one within the other, or I
strengthen the one length of gut by wrapping round it strips of gut made by
splitting open a piece of the hollow gut.
Air
I do not limit myself to the use of the gut of any particular animal, though I
naturally use those most easily obtained, viz., those of bullocks and sheep.
tubes made of gut are lighter, thinner and considerably stronger than those made
of india rubber and are consequently more suited for the purpose for which they
intended

page_text: It will be understood that my improved air tube may be used either as a
removable tube, or it may form the inner part or be otherwise incorporated with
composite tyres having solid walls.
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 a pneumatic or air inflated tyre, the use of gut for the construction of the
inner or air tube, as set forth.
2. In a pneumatic or air inflated tyre, the combination with an outer cover or
hollow tire, of an inner tube-to contain air-made of gut of animals and tanned
so as to remain soft and pliant, as set forth.
3. In a composite pneumatic or air inflated tyre having solid walls, incorporating
in the thickness of the said tyre a length of gut prepared as hereinbefore described
and for the purpose set forth.
D t
י
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.