IMPROVEMENTS IN WHEELS FOR GRINDING GLAZING AND POLISHING »
Year: 1882

page_text: LETTERS PATENT to James Robinson of Manchester in the County of
Lancaster for an Invention of "IMPROVEMENTS IN WHEELS FOR GRINDING
GLAZING AND POLISHING
»
PROVISIONAL SPECIFICATION left by the said James Robinson at the Office
of the Commissioners of Patents on the 26th July 1882.
JAMES ROBINSON of Manchester in the County of Lancaster. IMPROVEMENTS
IN WHEELS FOR GRINDING GLAZING AND POLISHING "
My invention relates to emery and other wheels for grinding, glazing and
polishing that are usually constructed of wood covered with walrus hide to which
hide the emery is glued: the covering of these wheels frequently becomes loose
thereby causing loss of time and the expense of recovering.
The object of my improvements is to construct wheels that will be very durable
and the covers of which will not become loose.
To effect this I make the inner part of the wheel of iron or other material and
in place of the walrus hide I cover the iron or other wheel with india-rubber
combined with thirty-three per cent or more or less of lime and seventeen per
cent, or more or less of sulphur: this composition which is very hard will adhere
firmly to the iron or other metal wheel or centre and I then cover it with a
composition of india-rubber with fifteen per cent or more or less of litharge and
five per cent or more or less of sulphur: this composition is then covered with
emery in the usual manner. I thus obtain a cover formed of one piece without
joint which is secured to the metal wheel or other centre without the use of nails
or bolts: this cover will not become loose and the expense of recovering is thus
avoided until the composition has been entirely worn away from the inner wheel
or centre.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Robinson in the Great Seal Patent Office on the
25th January 1883.
JAMES ROBINSON of Manchester in the County of Lancaster.
IN WHEELS FOR GRINDING, GLAZING AND POLISHING
"
"
IMPROVEMENTS
My invention relates to emery and other wheels for grinding, glazing and
polishing that are usually constructed of wood covered with walrus hide to which
hide the emery is glued the covering of these wheels frequently becomes loose
thereby causing loss of time and the expense of re-covering.
The object of my improvements is to construct wheels that will be very durable
and the covers of which will not become loose.
To effect this I make the inner part of the wheel of iron or other material and
in the place of the walrus hide I cover the iron or other wheel with india rubber
combined with thirty three per cent (or more or less) of lime and seventeen per
cent (or more or less) of sulphur: this composition which is very hard will adhere
firmly to the iron or other metal wheel or centre and I then cover it with a com-
position of india rubber with fifteen per cent (or more or less) of litharge and five
per cent (or more or less) of sulphur: this composition is then covered with emery
in the usual manner.
I thus obtain a cover formed of one piece without joint which is secured to the
metal wheel or other centre without the use of nails or bolts: this cover will not
become loose and the expense of re-covering is thus avoided until the composition
has been entirely worn away from the inner wheel or centre.
Having stated the nature of my Invention and described the manner of per-
forming the same I would have it clearly understood that I do not confine myself
to the details given as the same may be varied or modified and
I declare that I claim.
1. The improved wheel substantially as and for the purposes herein described:
2. The use of a composition of indin rubber, line, and sulphur and of a com-
position of india-rubber, litharge and sulphur, covered with emery in combination
with a wheel or centre of iron or other material in the manner and for the purposes
herein set forth.
In witness whereof I the said James Robinson have hereunto set my hand
and seal this twenty-fourth day of January One thousand eight hundred
and eighty three.