AN IMPROVED MODE OF ATTACHING INDIA- RUBBER TO THE TYRES OF WHEELS AND THE SURFACES OF PULLEYS AND CYLINDERS
Year: 1876

page_text: LETTERS PATENT to Isaac Blue Harris, of Castle Mills, Fountainbridge,
Edinburgh, for the Invention of "AN IMPROVED MODE OF ATTACHING INDIA-
RUBBER TO THE TYRES OF WHEELS AND THE SURFACES OF PULLEYS AND
CYLINDERS."
Sealed the 13th June 1876, and dated the 23rd March 1876.
PROVISIONAL SPECIFICATION left by the said Isaac Blue Harris at the
Office of the Commissioners of Patents on the 23rd March 1876.
ISAAC BLUE HARRIS, of Castle Mills, Fountainbridge, Edinburgh.
"AN IMPROVED
MODE OF ATTACHING INDIA-RUBBER TO THE TYRES OF WHEELS AND THE SURFACES
OF PULLEYS AND CYLINDERS."
Heretofore the application of india-rubber to the faces or convex surfaces of
carriage wheels, pulleys, and cylinders has been attended with considerable
difficulty, and especially with the inconvenience of requiring that such articles be
sent to an india-rubber factory before the elastic covering can be effectively attached
to their surfaces.
My Invention is designed to obviate this difficulty and inconvenience, and
consists, instead of immediately covering the wheel pulley or cylinder with india-
rubber or india-rubber compounds, of covering by any of the well-known means
now in use by india-rubber manufacturers the outside or convex surface of a flat
or grooved iron or other metal band, hoop, or cylindrical shell, having its inside
diameter somewhat larger than the outside diameter of the wheel pulley or cylinder
to be covered. This band, hoop, or cylindrical shell so covered with india-rubber
at an india rubber manufactory can be transported to the wheel, pulley, or cylinder
to be covered, slid thereon, and keyed thereto in any convenient way (as two inetal
pieces, one surrounding the other, may be keyed).
The keying on may be done by ordinary mechanical skill, and hence the incon-
venience and expense of transport of the wheel, pulley, or cylinder to an india-
rubber manufactory will be entirely avoided not only for the first, but for all
subsequent coverings.
In some cases I employ instead of the metal band, hoop, or cylindrical shell, as
a base to which to attach the india-rubber covering, a vulcanite or hard india-

page_text: rubber band, hoop, or cylindrical shell, which can be.keyed on to the wheel, pulley,
or cylinder, in the same manner as the metal basc.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Isaac Blue Harris in the Great Seal Patent Office on the 22nd
September 1876.
ISAAC BLUE HARRIS, of Castle Mills, Fountainbridge, Edinburgh. "AN IMPROVED
MODE OF ATTACHING INDIA-RUBBER TO THE TYRES OF WHEELS AND THE SURFACES
OF PULLEYS AND CYLINDERS."
Heretofore the application of india-rubber to the faces or convex surfaces of
carriage wheels, pulleys, and cylinders has been attended with considerable
difficulty, and especially with the inconvenience of requiring that such articles
be sent to an india-rubber factory before the elastic covering can be effectively
attached to their surfaces.
My Invention is designed to obviate this difficulty and inconvenience, and
consists, instead of immediately covering the wheel, pulley, or cylinder with india-
rubber or india-rubber compounds, of covering by any of the well-known means
now in use by india-rubber manufacturers the outside or convex surface of a flat
or grooved iron or other metal band, hoop, or cylindrical shell, having its inside
diameter somewhat larger than the outside diameter of the wheel, pulley, or
cylinder to be covered. This band, hoop, or cylindrical shell so covered with
india-rubber at an india-rubber manufactory can be transported to the wheel,
pulley, or cylinder to be covered, slid thereon, and secured thereto in any convenient
way (as two metal pieces, one surrounding the other, may be secured).
The attachment of the, covered hoop to the wheel, pulley, or cylinder may be
effected by ordinary mechanical skill, and hence the inconvenience and expense of
transport of the wheel, pulley, or cylinder to an india-rubber manufactory will not
only for the first but for all subsequent coverings be avoided.
In some cases I employ instead of the metal band, hoop, or cylindrical shell, as
a base to which to attach the india-rubber covering, a vulcanite or hard india-
rubber band, hoop, or cylindrical shell, which can be secured to the wheel, pulley,
or cylinder, in the same manner as the metal base.
The form of the metal hoop, as well as its dimensions, will depend on the
character of article to which it is to be applied. Thus, for example, in pre-
paring an elastic tyre for a carriage wheel I use a double flanged hoop to receive
the elastic band of rubber.
For broad pulleys and cylinders the hoops will not in general require to be
flanged, but they may, when thought desirable, be slightly recessed on their outer
periphery.
The covered hoops may be secured in place by means of keys, but when applying
them to carriage wheels I prefer to secure them by screw pins passed through tho
felloe of the wheel and through the metal tyre to holes drilled in the hoop or metal
base of the elastic tyre. These screw pins I prefer to make with a thread extending
from the head of the screw to a distance about equal to the depth of the felloe, in
order that the pin may take a good hold of the wheel, and the end of the pin I
make smooth that it may fit holes bored to receive it in the metal tyre and in the
hoop. These pins will be conveniently applied at the middle of the felloc, one being
introduced intermediate of each pair of spokes.
The hoop will be drilled with holes at equal distances apart before the india-
rubber covering is applied thereto, and the wheelwright in affixing the rubber-
covered hoop will first fit it to the wheel and mark off thereon the position of the
holes in the hoop; he will then remove the hoop and drill through the tyre and
felloe of the wheel the pin holes for the reception of the screw pins. This being
done, he will again apply the rubber-covered hoop, insert the screw pins, and screw

page_text: them up until their ends enter the holes in the hoop. This will ensure a firm
attachınent of the elastic tyre to the wheel, and yet allow of its facile removal
when a fresh elastic tyre is required.
Having now set forth the nature of my Invention of an improved mode of
attaching india-rubber to the tyres of wheels and the surfaces of pulleys and
cylinders, and explained the manner of carrying the same into effect, I wish it to
be understood that under the above in part recited Letters Patent I claim, attaching
tyres or coverings of india-rubber to wheels, pulleys, and cylinders, through the
intervention of a rigid band or hoop, in the inanner and for the purpose above
described.
In witness whereof, I, the said Isaac Blue Harris, have hereunto set my hand
and seal, this Nineteenth day of September, in the year of our Lord One
thousand oight hundred and seventy-six.
1. B. HARRIS.
(L.S.)