Improvements in Apparatus or Appliances for Protecting Pneumatic Tyres of Bicycles, Tricycles, and other Road Vehicles.
Year: 1892

page_text: Date of Application, 25th Aug., 1892
Complete Specification Left, 23rd May, 1893-Accepted, 19th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus or Appliances for Protecting Pneumatic
Tyres of Bicycles, Tricycles, and other Road Vehicles.
I JOSEPH GOTHARD, Manufacturer of Wordsworth Road, Small Heath and
Lawley Street Birmingham in the County of Warwick do hereby declare the
nature of this invention to be as follows:-
My improvements relate to the apparatus or appliances hereafter described for
constructing the pneumatic tyre in combination with a rubber tyre placed outside
and beyond the said pneumatic tyre, separated by a metallic symetrical section
ring, built up in segments, such ring (when built up) the inner surface is formed to
take a bearing on the outer diameter of the pneumatic tyre under slight pressure,
and when inflated. The outer diameter or edge of the metallic ring is constructed
to fit the inner surface of the solid rubber cushion. The metallic intermediate
ring is constructed with side bearings to slide easily in the sides of the rim of the
body of the wheel overlapping the pneumatic tyre, such overlapping to extend
beyond the centre line of the pneumatic tyre of the sufficient distance required to
give the intermediate ring stability and freedom to work vertically.
Dated this 24th day of August 1892.
JOSEPH GOTHARD.
COMPLETE SPECIFICATION.
Improvements in Apparatus or. Appliances for Protecting Pneumatic
Tyres of Bicycles, Tricycles, and other Road Vehicles.
JOSEPH GOTHARD, Manufacturer, of Wordsworth Road, Small Heath and
Lawley Street Birmingham in the County of Warwick, 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 has reference to the apparatus known as pneumatic tyres for the
rim of wheels for bicycles tricycles and other road vehicles and is for the protection
of the pneumatic tyre from injury by puncture and other damage when running.on
the roadway, as hereinafter described and illustrated by sectional drawing..
My invention consists,
1st. In the construction of a pneumatic tyre in combination with a solid rubber
tyre placed outside the pneumatic tyre. The rubber tyre is separated from the
pneumatic tyre by a symmetrical sectioned metallic ring, built up in segments for
the convenience of fixing together over the pneumatic tyre, when the pneumatic
tyre is in position on the rim of the wheel. The pneumatic tyre when inflated and
without load will always be slightly under pressure between the rim of the wheel
and the metallic ring.
2nd. The metallic ring is constructed in symmetrical halves bolted or screwed
together in the centre or web of the segments as shewn on drawing at a.
The joint
of each segment when bolted or screwed together do not terminate opposite cach
other but overlap. When thus bolted together the inner circle of the ring will
form a concave to receive the outer surface of the pneumatic tyre as shewn on
drawing at b, such concave extending to about one fourth the circumference of the
section of the pneumatic tyre. The metallic ring is extended on either side as
shewn on drawing at c of sufficient distance to allow the pneumatic tyre to expand
laterally (when under pressure) freely. The sides of the metallic ring extends

page_text: :
vertically to the centre line. of. the pneumatic tyre and slide freely in the
overlapping sides of the rim offthe: wheel as shewn on drawing at d.
at e.
3rd. The rim of the wheel is constructed in the centre of a concave form to
receive the inner diameter and bearing of the pneumatic tyre as shewn on drawing
The concave to take a permanent bearing of about one fourth of the
circumference of the section of the pneumatic tyre. On either side of the
pneumatic tyre the rim extends to a distance to cover the extended distance of
the intermediate metallic ring as shewn on drawing at f. The rim is then turned
down to overlap the intermediate ring to about one fourth of an inch below the
side of the metallic ring (when at rest and unloaded) as shewn on drawing at 9.
4th. The rubber tyre forming the periphery of the wheel fits in the circular
groove formed by the two symmetrical halves of the metallic ring when bolted
. together. The rubber tyre is fitted to the ring in the usual way.
L
5th. The rim of the wheel may be constructed to work inside the intermediate
ring at the sides but I prefer the plan I have described.
6th. The segments of the intermediate ring may be formed in cast metal or may
be stamped into shape from thin sheet steel or other metal.
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 are:-
1st: The protection of the pneumatic tyre by an independent rubber cushion
tyre fixed outside the pneumatic tyre and supported by means of an intermediate
metal ring as described and illustrated.
2nd. The construction of the metal ring to slide vertically either inside or
outside the overlapping sides of the rim of the wheel as described and set forth.
Dated this 20th day of May 1893.
Witness to the signature of Joseph Gothard,
WM. E. WINBY,
122, Pershore Road, Edgbaston.
JOSEPH GOTHARD.