IMPROVE- MENTS IN THE MANUFACTURE OF GROOVED TYRES FOR WHEELS "
Year: 1883

page_text: LETTERS PATENT to William Hassalwood Carmont of Manchester in the
County of Lancaster Consulting Engineer for an Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF GROOVED TYRES FOR WHEELS "
PROVISIONAL SPECIFICATION left by the said William Hassalwood Carmont
at the Office of the Commissioners of Patents on the 8th February 1883.
WILLIAM HASSALWOOD CARMONT of Manchester in the County of Lancaster
Consulting Engineer. "IMPROVEMENTS IN THE MANUFACTURE OF GROOVED TYRES
FOR WHEELS
"
The object of my invention is to produce tyres grooved in the form of a dovetail
for the purpose of holding or securing india-rubber or other yielding substance
In performing my Invention I roll a section similar to ordinary channel iron but
with the lower surface of the base of the section concave. I then pass it through
a groove of the necessary shape in rollers that flatten the base thereby causing the
upper edges of the tyre or channel to approach one another and thus form the
dovetailed groove desired.
My invention is applicable either to welded or weldless tyres.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Hassalwood Carmont in the Great Seal Patent Office on
the 6th August 1883.
WILLIAM HASSALWOOD CARMONT, of Manchester in the County of Lancaster
Consulting Engineer "IMPROVEMENTS IN THE MANUFACTURE OF GROOVED TYRES
FOR WHEELS
"
The object of my Invention is to produce tyres grooved in the form of a dovetail
for the purpose of holding or securing india-rubber or other yielding substance.
In performing my Invention I roll a section similar to ordinary channel iron but
with the lower surface of the base of the section concave. I then pass it through
a groove of the necessary shape in rollers that flatten the base thereby causing the
upper edges of the tyre or channel to approach one another and thus form the
dovetailed groove desired.
My Invention is applicable either to welded or weldless tyres.
And in order that my Invention may be fully understood and readily carried
into effect I will proceed to describe the accompanying Sheet of Drawings reference
being had to the figures and letters marked thereon.
Figs. 1 and 4 are front views of the forming groove in the rollers. Figs. 2 and 5
are front views of the finishing groove in rollers employed in the manufacture of
grooved tyres for wheels according to my Improvements. and Figs. 3 and 6 are
sections of finished tyres made according to my Invention.
Similar letters refer to similar parts throughout the several views.
In Figs. 1 and 2. a is the upper and b the lower roller between which, see
Fig. 1, I roll a section o similar to ordinary channel iron but with the lower
surface of the base of the section concave, see Fig. 1. I then pass the section c
through a finishing groove of the necessary shape, see Fig. 2 between the rollers a
and b that flatten the base of the section thereby causing the flanges to approach
one another and thus forming the dovetailed groove required to hold the india-
rubber fin the finished tyre as shown in Fig. 3
In Figs. 4 and 5 the process is similar to that described with reference to Figs. 1
and 2 but in rolling the section c the inner edges of the flanges are swelled or
bulged as shown in Fig. 4. I then pass the section c through the finishing groove
(see Fig. 5) which flattens the base of the section leaving the sides at right angles
thereto and causing the projections on the inner edges to form an undercut groove
of slightly different shape to that shown in Fig. 2. The india-rubber being
forced into the groove is thus held in the finished tyre by the annular projections c¹
as shown in Fig. 6
Having stated the nature of my Invention and described the manner of performing
the same
I declare that I claim.
The improvements in the manufacture of grooved tyres for wheels substantially
as and for the purposes herein shown and described.
In witness whereof I the said William Hassalwood Carmont have hereunto set
my hand and seal this fourth day of August One thousand eight hundred and
eighty three.