IMPROVEMENTS IN MAKING METAL FOUNDERS' BLACKING
Year: 1874

page_text: LETTERS PATENT to William Allan, of Glasgow, in the County of
Lanark, North Britain, for the Invention of "IMPROVEMENTS IN
MAKING METAL FOUNDERS' BLACKING."
Sealed the 19th March 1875, and dated the 25th September 1874.
PROVISIONAL SPECIFICATION left by the said William Allan at the
Office of the Commissioners of Patents, with his Petition, on the
25th September 1874.
I, WILLIAM ALLAN, of Glasgow, in the County of Lanark, North
Britain, do hereby declare the nature of the said Invention for "Iм-
PROVEMENTS IN MAKING METAL FOUNDERS' BLACKING," to be as follows, that is
to say :-
This Invention relates to metal founders' blacking (or "blackening"
as it is sometimes termed) of a kind made with still coke prepared as
described in the Specification of Letters Patent granted to John
Carrington Sellars, and dated 26th September 1866, (No. 2479), and has

page_text: for its object the making of various qualities of blacking of improved
and superior character, and suitable for the varied requirements of
metal founders.
The Invention consists in combining with the still coke the following
substances, or any one or more of them, namely, the refuse of the manu-
facture of prussiate of potash, clay, moss char or peat char, gas coke,
coked coal, wood char, or other coke or charcoal.
The proportions of the ingredients may be varied to suit special
cases, but it is believed that blackings made according to the following
examples will meet general requirements.
Example 1. Four parts refuse, dried and sifted or ground between
stones, mixed with four parts ground still coke and one part moss char
or peat char.
Example 2.-One to two parts of moss char or peat char, mixed with
five to seven parts clay and one to four parts ground still coke.
Example 3.-Four to five parts refuse dried, sifted, and ground with
four to five parts still coke.
Example 4. Three to five parts refuse dried, sifted, and ground with
one to three parts wood char and three to five parts prepared still
coke.
]
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Allan in the Great Seal Patent Office
on the 22nd March 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ALLAN, of Glasgow, in the County of Lanark, North Britain, send 2
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of September, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors, give 30
and grant unto me, the said William Allan, Her special licence that I,

page_text: the said William Allan, my executors, administrators, and assigns, or
such others as I, the said William Allan, my 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 "IMPROVEMENTS IN MAKING METAL
FOUNDERS' BLACKING," upon the condition (amongst others) that I, the said
William Allan, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should
ticularly 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.
par-
NOW KNOW YE, that I, the said William Allan, 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 statement in writing, that is to say:-
_
My said Invention relates to metal founders' blacking (or "blackening"
as it is sometimes termed) of a kind made with still coke prepared as
described in the Specification of Letters Patent granted to John
Carrington Sellars, and dated 26 September 1866 (No. 2479), and has
for its object the making of various qualities of blacking of improved
and superior character, and suitable for the varied requirements of
metal founders.
My Invention consists in combining with the still coke the following
substances, or one or more of them, namely, the refuse of the manu-
facture of prussiate of potash, clay, moss char or peat char, gas coke,
coked coal, wood char, or other coke or charcoal.
The proportions of the ingredients may be varied to suit special cases,
or to compensate for variations in the conditions or qualities of the
several ingredients as will be understood by any one practically con-
versant with the manufacture of metal founders' blacking.
But in order that my said Invention and the manner of performing
the same may be properly understood, I proceed to particularly describe

page_text: 2. The making of metal founders' blacking with still coke combined
with moss or peat char and clay, as herein-before described.
In witness whereof, I, the said William Allan, have hereunto set
my hand and seal, this Nineteenth day of March, in the year of
our Lord One thousand eight hundred and seventy-five.
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
W. ALLAN. (L.S.)