A COMPOSITION FOR COATING. METAL PLATES OR WHEELS USED FOR GRINDING, SHARPENING, OR POLISHING
Year: 1856

page_text: LETTERS PATENT to David Fisher, of 12, Ranelagh Road, Thames
Bank, in the County of Middlesex, Engineer, for the Invention of
"A COMPOSITION FOR COATING. METAL PLATES OR WHEELS USED FOR
GRINDING, SHARPENING, OR POLISHING."
Sealed the 30th October 1856, and dated the 8th July. 1856.
PROVISIONAL SPECIFICATION left by the said David Fisher at the
Office of the Commissioners of Patents, with his Petition, on the
8th July 1856.
I, DAVID FISHER, of 12, Ranelagh Road, Thames Bank, in the County of
Middlesex, Engineer, do hereby declare the nature of the said Invention for
'A COMPOSITION FOR COATING METAL PLATES OR WHEELS USED FOR GRINDING,
SHARPENING, OR POLISHING," to be as follows:-
My Invention consists in the preparation of a new composition of matter,
and its application to the surface of metal plates or wheels, for the purpose of
giving them the property of grinding & polishing.
The ingredients of my new composition are the following:-corundum, in
powder; emery, in powder; steel filings; crocus; quartz, in powder; rouge;
slag or cinder, in powder; Venice turpentine; shell lac; boiled oil and rosin.
These ingredients I mix and subject to heat, and apply in the heated state to

page_text: the surfaces to be coated. When cold, the composition adheres with great
tenacity to the surface to which it has, been applied, and imparts to it an
efficient capacity for grinding & polishing.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said David Fisher, in the. Great Seal Patent Office on the
8th January 1857..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
FISHER, of 12, Ranelagh Road, Thames Bank, in the County of Middlesex,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of July, in the year of our Lord One
thousand eight hundred and fifty-six, in the twentieth year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto him, the said David
Fisher, Her special licence that he, the. said David Fisher, his executors,
administrators, and assigns, or such others as be, the said David Fisher, his
executors, administrators, and assigns, should at any time agree with, and
no others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "A COMPOSITION FOR COATING METAL
PLATES OR WHEELS USED FOR GRINDING, SHARPENING OR POLISHING," upon
the condition (amongst others) that he, the said David Fisher, his execu-
tors or administrators, by an instrument in writing under his, or their, or
one of their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of the said
Letters Patent.
!.
NOW KNOW YE, that I, the said David Fisher, do hereby declare the
nature of my said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following state-
ment:
My Invention consists in the use and application of corundum, either
separately or with other similar ingredients in the form of a composition, as a
substitute for the present means of acting by attrition upon other substances,

page_text: or, in other words, of effecting the operation of grinding, sharpening, and
polishing.corundum or adamantine spar in a state of pulverization, used alone
or mingled, for the purposes of economy, with crystalized quartz, and other
substances possessing less.powers of attrition, is mixed with other plastic and
glutinous substances, such as rosin, oil, shellac, Venice turpentine, &c., reduced
to a melted state, and forms when cold a hard substance, capable of grinding,
sharpening, and polishing with power and effect. It may also be mixed with
lard; oil, or similar substance, and is then used and applied in a pasty state
upon a strap, wheel, or other apparatus, for the purpose of sharpening, &c.,
cutting, and other instruments. I do not confine myself to the proportions
hereafter named, nor to-the-use, as-necessary to produce ithe-grinding-and-
polishing effect, of all the ingredients mentioned, but claim especially the com-
bination of corundum with any, or all, or, similar ingredients, for the purposes
mentioned. From the experiments made, I believe the following ingredients
and proportions are the best, economically to be combined for grinding purposes,
viz, melt and mix together eighty-four pounds of Venice turpentine, eighty-four
pounds of rosin, one hundred and eight pounds of-shellac, ten pounds of mastic,
and four quarts of boiled oil; while in a state of liquifaction, add, and carefully
mix, all being in a pulverized state, eight hundred and ninety-six pounds of cor-
undum, two hundred and twenty-four pounds of steel filings, two hundred and
twenty-four pounds of slag, and one hundred and twelve pounds of crystallized
quartz. For polishing purposes, melt and mix together thirty-five pounds of
rosin, twenty-six pounds of Venice turpentine, sixty-one pounds of shellac, five
pounds of mastic, and two quarts of boiled oil; then add, mixing thoroughly,
two hundred and twenty-four pounds of corundum, fifty-six pounds of
crystallized quartz, one hundred and twelve pounds of rouge, fifty-six pounds
of flour of emery, and one hundred and twelve pounds of crocus, all well
pulverized. To make a combination that shall remain of a pasty consistence,
I mix well together twenty pounds of the finest flour of corundum, four pounds
of hogs lard, and half a pint of oil. While the composition is in a melted state
it is plastic, and may be moulded into suitable shapes for use, and when cool
will assume a hard stone-like consistency of strength and durability. When it
is desired to attach it to metal plates, wheels, &c. to strengthen and protect it
from too much action when moving with velocity, I construct the plate, wheel,
&c., with cup-like flanges on the edge or edges, and introduce upon the
receiving surface numerous projections, to be imbedded in the composition so
formed or bent in an acute angle to the surface, as to aid in retaining the com-
position thereon. If a wheel is to be coated, it may be laid on a flat plate,
faced or turned, and oiled to prevent adhesion: then a ring also cited

page_text: shaped to mould the form of the external surface, is laid also on the plate
around the wheel, giving sufficient space for the composition. This space is
then filled in and the upper side smoothed off with a hot iron; when cold, the
ring is removed, and the wheel is finished. In coating a plate, or cone, or
convex surface, the exterior mould may be filled, and the receiving surface,
with the projections above named, be then forced into the mass to remain until
cold.
What I claim as my Invention is, the use and application of a composition
in the form and combinations as described, or any other in which corundum is
used, substantially the same, for the purposes of grinding, sharpening, and
polishing, for coating wheels, plates, or for other purposes.
In witness whereof, I, the said David Fisher, have hereunto set my hand
and seal, this Seventh day of January, in the year of our Lord One
thousand eight hundred and fifty-seven.
DAVID FISHER. (L.S.)