AN IMPROVEMENT OR IMPROVE- MENTS IN THE MANUFACTURE OF CEMENTS OR ADHESIVE SOLUTIONS FOR JOINING OR CONNECTING TOGETHER SURFACES OR ARTICLES OF LEATHER, WOOD, PAPER, OR OTHER SIMILAR MATERIALS
Year: 1861

page_text: LETTERS PATENT to Murdoch McKay, of Birmingham, in the County of
Warwick, Chemist, for the Invention of "AN IMPROVEMENT OR IMPROVE-
MENTS IN THE MANUFACTURE OF CEMENTS OR ADHESIVE SOLUTIONS FOR JOINING
OR CONNECTING TOGETHER SURFACES OR ARTICLES OF LEATHER, WOOD, PAPER,
OR OTHER SIMILAR MATERIALS."
Sealed the 16th October 1861, and dated the 18th June 1861.
PROVISIONAL SPECIFICATION left by the said Murdoch McKay at the
Office of the Commissioners of Patents, with his Petition, on the
18th June 1861..
I, MURDOCH MOKAY, of Birmingham, in the County of Warwick, Chemist,
do hereby declare the nature of the said Invention for "AN IMPROVEMENT OR
IMPROVEMENTS IN THE MANUFACTURE OF CEMENTS OR ADHESIVE SOLUTIONS FOR
JOINING OR CONNECTING TOGETHER SURFACES OR ARTICLES OF LEATHER, WOOD, PAPER,
OR OTHER SIMILAR MATERIALS," to be as follows, that is to say :-
In manufacturing my improved cements or adhesive solutions I take the
bisulphuret of carbon, or its chemical constituents or equivalents, in which I
dissolve pure gutta percha, leaving the vessel in which I am working open, to
allow the bisulphuret of carbon to take up a sufficient quantity of oxygen.
The proportions of each ingredient employed will depend upon the strength or
tenacity required in the cement or solution. Where great strength is wanted

page_text: I should employ a saturated solution of the gutta percha, which would be
almost a plastic cement. For lighter purposes I should use a considerable
excess of the bisulphuret of carbon, modifying the proportions as before stated,
to suit any particular use.
In mixing the solution care should be taken not to expose it too long to the
action of the oxygen, as the bisulphuret of carbon, being of an exceedingly
volatile nature, evaporates very rapidly, this must be left to the judgment of
the operator. A few minutes' exposure to the air being sufficient in making
moderate quantities of the cement.
The cements or solutions which may thus be formed are useful for joining
or connecting together surfaces or portions of leather, wood, paper, or other
similar materials, by merely brushing it on to the article to be operated upon,
pressing the edges firmly together and allowing it a few minutes to set.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Murdoch McKay in the Great Seal Patent Office on
the 17th December 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MURDOCHE
MCKAY, of Birmingham, in the County of Warwick, Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of June, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fourth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Murdoch McKay, Her special license that I, the said Murdoch
McKay, my executors, administrators, and assigns, or such others as I, the
said Murdoch McKay, 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 Bri-
tain and Ireland,, the Channel Islands, and Isle of Man, an Invention
for "AN IMPROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF CEMENTS
OR ADHESIVE SOLUTIONS FOR JOINING OR CONNECTING TOGETHER SURFACES OR ARTICLES
OF LEATHER, WOOD, PAPER, OR OTHER SIMILAR MATERIALS," upon the condition
(amongst others) that I, the said Murdoch McKay, by an instrument in
writing under my hand and seal, 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

page_text: within six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Murdoch McKay, 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 by the following
statement (that is to say)
In manufacturing my improved cements or adhesive solutions I take the
bisulphuret of carbon, or its chemical constituents or equivalents, in which I
dissolve pure gutta percha, leaving the vessel in which I am working open to
allow the bisulphuret of carbon to take up a sufficient quantity of oxygen.
The proportions of each ingredient employed will depend upon the strength or
tenacity required in the cement or solution. Where great strength is wanted
I should employ a saturated solution of the gutta percha, which would be
almost a plastic cement. For lighter purposes I should use a considerable
excess of the bisulphuret of carbon, modifying the proportions as before stated,
to suit any particular use.
In mixing the solution care should be taken not to expose it too long to the
action of the oxygen, as the bisulphuret of carbon being of an exceedingly
volatile nature evaporates very rapidly, this must be left to the judgment of
the operator, a few minutes' exposure to the air being sufficient in making
moderate quantities of the cement.
The cements or solutions which may thus be formed are useful for joining
or connecting together surfaces or portions of leather, wood, paper, or other
similar materials, by merely brushing it on to the article to be operated upon,
pressing the edges firmly together, and allowing it a few minutes to set.
To remove or partially destroy the unpleasant odour arising from the mixing
and using of these ingredients I can employ with them small quantities of
ether and spirits of turpentine mixed, the proportions of which may also be
left to the will of the operator.
In the manufacture of many, articles of leather the use of this cement or
adhesive solution will be found advantageous, as it can be so well employed in
joining thin skins or surfaces together in layers to form a thick material, or a
skin of leather may be attached to a surface of paper or canvass, and the com-
pound material, of whatsoever nature it may be, will be thoroughly waterproof,
a single coating of the solution having the power of effectually waterproofing
any material which it may be laid. Portmanteaus, gaiters, bags, and
many other articles can, therefore, be made up of one or more skins of inferior
leather, and still be far more protective from water than others made of more
solid leather.
upon

page_text: Having thus described the nature of my said Invention, and in what manner
the same is to be performed, I claim the improvements in the manufacture of
cements or adhesive solutions by dissolving gutta percha in the bisulphuret of
carbon, or its chemical constituents or equivalents as herein morefull set forth
and specified.
In witness whereof, I, the said Murdoch McKay, have hereunto set my
hand and seal, this Sixteenth day of December, in the year of our
Lord One thousand eight hundred and sixty-one.