IMPROVEMENTS IN THE MANUFACTURE OF MORTAR FOR BUILDING PURPOSES
Year: 1869

page_text: LETTERS PATENT to Osman Barrett and George Printy Wheeler, of
Mitcheldean, in the County of Gloucester, for the Invention of
IMPROVEMENTS IN THE MANUFACTURE OF MORTAR FOR BUILDING
PURPOSES."
Sealed the 30th November 1869, and dated the 1st June 1869.
PROVISIONAL SPECIFICATION left by the said Osman Barrett and
George Printy Wheeler at the Office of the Commissioners of
Patents, with their Petition, on the 1st June 1869.
We, OSMAN BARRETT and GEORGE PRINTY WHEELER, of Mitcheldean,
in the County of Gloucester, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE MANUFACTURE OF MORTAR FOR BUILDING
PURPOSES," to be as follows:-
Our Invention has for its object the manufacture of mortar for
building purposes, which said mortar on account of its quality, cheap-
ness, and readiness for use will be capable of universal adaptation.
The disadvantages arising from those kinds of mortar at present in
use are chiefly owing to inferior sand being used, and the great difficulty
of obtaining sand at a moderate price.
LU 017

page_text: By this Invention a mortar will be produced only requiring the
addition of water to render it fit for immediate use.
Having stated the object of our Invention we proceed to show the
manner of preparing the mortar.
For one ton of our improved mortar we grind and otherwise prepare
by suitable machinery the following materials, viz.:-288 lbs. of lime
(either caustic or hydrate). 1,728 lbs. of slag (i.e. the vitreous mass
which covers fused metal in the smelting hearths, and is known as
dross, slag, or scoriæ, and in chemical terms as silicate of lime or
silicate of alumina), and 224 lbs. of calcined coal shale clay. These
materials having been ground to the size required and otherwise pre-
pared are eventually mixed in such proportions as deemed necessary,
the mortar being then ready for use in a dry and powdered state.
The nature of the materials of which this mortar is composed, their
great affinity for one another, and the chemical action produced rerder
the quality of the mortar thus manufactured superior for its tenacity,
bardness, and durability to anything of the kind ever known for building
purposes, and also for concrete.
For plastering purposes it has special qualities, inasmuch as owing to
its great tenacity it is not necessary to mix hair therewith, while at the
same time great smoothness of surface is obtained.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Osman Barrett and George Printy Wheeler in the
Great Seal Patent Office on the 30th November 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, OSMAN
BARRETT and GEORGE PRINTY WHEELER, of Mitcheldean, in the County
of Gloucester, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of June, in the year of our
Lord One thousand eight hundred and sixty-nine, in the thirty-second
year of Her reign, did, for Herself. Her heirs and successors, give and
grant unto us, the said Osman Barrett and George Printy Wheeler, Her
special licence, that we, the said Osman Barrett and George Printy
Wheeler, our executors, administrators, and assigns, or such others as
we, the said Osman Barrett and George Printy Wheeler, our executors,

page_text: 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 "IMPROVEMENTS IN THE MANU-
FACTURE OF MORTAR FOR BUILDING PURPOSES," upon the condition (amongst
others) that we, the said Osman Barrett and George Printy Wheeler, our
executors or administrators, by an instrument in writing under our,
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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said Osman Barreit and George Printy
Wheeler, do hereby declare the nature of our said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement (that is to say)
Our Invention has for its object. the manufacture of mortar for
building purposes, which said mortar on account of its quality, cheap-
ness, and readiness for use will be capable of universal adaptation.
The disadvantages arising from the kinds of mortar at present in use
are chiefly owing to inferior sand being used, and the great difficulty of
obtaining sand at a moderate price.
By this Invention a mortar will be produced only requiring the
addition of water to render it fit for immediate use.
Having thus stated the object of our Invention, we proceed to shew
the manner of preparing the mortar.
For one ton of our improved mortar we grind and otherwise prepare
by suitable machinery the following materials:-
lbs.
288 of lime, either caustic or hydrate:
1,728 of slag, i.e., the vitreous mass which covers fused metal
in the smelting hearths, and is known as dross, slag, or
scorie, and in chemical terms by the names of silicate
of lime and silicate of alumina;
and 224 of calcined coal shale clay.

page_text: These materials having been ground to the size required and otherwise
prepared are eventually mixed in such proportions as deemed necessary,
the mortar being then ready for use in a dry and powdered state.
The nature of the materials of which this mortar is composed, their
great affinity for one another, and the chemical action produced render
the quality of the mortar thus manufactured superior for its tenacity,
hardness, and durability to anything of the kind ever known for
building purposes, and also for concrete.
For plastering purposes it has special qualities, inasmuch as owing to
its great tenacity it is not necessary to mix hair therewith, while at the
same time great smoothness of surface is obtained.
And, lastly, let it be clearly understood that we do not confine
ourselves to the precise proportions herein stated, as that must depend
upon the purposes for which it will be required.
Having thus described the nature and particulars of our said
Invention,
We claim 1. The right to use slag and calcined coal shale clay either
separate or together, with or without lime, for the purposes herein
described.
We claim 2. The right (in connection with slag and calcined coal
shale clay) to use either caustic or hydrato lime for the purpose of
making ordinary mortar to set slow, or hydraulic mortar to set quick.
We claim 3. The right to use with lime, slag, and calcined coal
shale clay any other materials capable of mixing with them, such as
brick dust, clinkers, ashes, sandstone, calciued marl clay, and every
description of sand that can be procured for the purpose of manu-
facturing mortar, plaster, and concrete, as herein described.
In witness whereof, we, the said Osman Barrett and George Printy
Wheeler, have hereunto set our hands and seals, this Twenty-
fourth day of November, in the year of our Lord One thousand
eight hundred and sixty-nine.
OSMAN BARRETT.
(1..s.)
GEORGE PRINTY WHEELER. (L..s.)