Improvements in and relating to Pneumatic Tyres.
Year: 1893

page_text: Date of Application, 23rd Feb., 1893
Complete Specification Left, 15th Nov., 1893-Accepted, 16th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I, ROBERT SAMUEL LOVELACE, of Blackmoor Cycle Works, Henstridge, in
the County of Somerset, Cycle Manufacturer, do hereby declare the nature of this
invention to be as follows:-
•
My invention relates to an improved form of cover for pneumatic tyres, the
object being to prevent side slipping.
According to my invention I form on or fix to the exterior part of the cover or
jacket, forming the tread of the wheel, a series of ridge pieces forming a central
divided ridge round the periphery of the tyre. The ridge pieces are preferably of
a triangular or cone-shape in cross section and they are preferably made of a harder
quality of rubber than the body of the cover.
The ridge pieces are formed on or fixed to the cover so that their apices project
outwards.
I do not limit myself to any particular size for these ridge pieces, but I find that
a convenient size is about four to six inches long with intermediate spaces from
ope to three inches long.
Dated this 23rd day of February 1893.
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 Tyres.
I, ROBERT SAMUEL LOVELACE, of Blackmoor Cycle Works, Henstridge, in
the County of Somerset, Cycle Manufacturer, 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 an improved form of cover for pneumatic tyres, the
object being to prevent side slipping.
According to my invention I form on or fix to the exterior part of the cover or
jacket at that part of it forming the tread of the wheel, a series of ridge pieces
forming a central divided ridge round the periphery of the tyre. The ridge pieces
are preferably of a triangular or cone-shape in cross section and they are preferably
made of a harder quality of rubber than the body of the cover or jacket.
In order that my invention may be fully understood I will more particularly
describe it making reference to the accompanying drawing in which Figure 1 is a
view in transverse section of a cover or jacket for a pneumatic tyre constructed
according to my invention, and Figure 2 is a broken view in longitudinal section
thereof.
In both views similar parts are marked with like letters of reference.
On to the centre of the cover A are formed or fixed a series of longitudinal ridge
pieces B of a triangular or cone-shape in cross section and of any suitable length
and pitch, the distance between the pieces being preferably greater than the length
of the said pieces. I find from practice that a suitable length for the pieces B is
one inch and that a suitable distance for them to be placed apart is two inches,
the transverse shape of the ridge pieces being a triangle each side of which
measures three eighths of an inch.

page_text: These ridge pieces are preferably moulded in one with the cover and are prefer-
ably made of a harder quality of rubber than the cover or jacket, they may how-
ever be cemented or otherwise fixed to the cover after it is moulded, or as a
modification the ridge pieces may be fixed to a strip of any suitable fabric adapted
to be solutioned or otherwise fixed to the cover or jacket.
By making the ridge pieces of a triangular or cone shape and by spacing them
apart the tyre is enabled to get a grip on the road through any amount of
overlaying mud without any loss of power by driving slip.
I am aware that the covers or jackets of pneumatic tyres have already been
made corrugated and also that they have been made with one or more continuous
ridges and therefore do not claim a ridged cover or jacket broadly, but
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. A cover or jacket for a pneumatic tyre having a single intermittent ridge of
a triangular or cone-shape, as set forth.
2. In a pneumatic tyre, a cover or jacket A having on its tread a series of ridge
pieces B, constructed, arranged, and operating, as hereinbefore described and
illustrated by the accompanying drawing.
Dated this 15th day of November 1893
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.