Year: 1886

page_text: Date of Application, 20th Nov., 1886.
Complete Left, 2nd Feb., 1887.
Complete Accepted, 4th Mar., 1887
I, JAMES DOUGLAS WATSON of 162 Renfield Street, Glasgow, in the County of
Lanark, North Britain, Chemist and Druggist, do hereby declare the nature of this
invention to be as follows:-
This Invention which relates to an improved method of annealing Glass or articles
manufactured therefrom, has for its object to so anneal the glass as to render it more
tenacious or tough, strong and durable, and of less susceptibility to breakage.
The Invention consists in placing the Glass, while in its plastic state into moulds,
and thereafter deposited in a Tank of boiling Tallow, which Tallow, is kept in its
boiling state for a time, according to the thickness of the Glass to be annealed, and
thereafter allowed to slowly cool.
The effect of the boiling Tallow upon the plastic Glass has been found to be very
powerful and effective as to produce annealed Glass, or articles manufactured therefrom,.
of the character above mentioned as to render it less susceptible to breakagé, stronger,
more tenacious and durable than hitherto experienced.
The annealed Glass is especially applicable for footlights, and Pavement Grating,
but it is quite clear, that my method of annealing Glass, is applicable for, other articles
of manufacture, including Glass Rails for railways, which are not so liable to
contraction by cold, or expansion by heat.
D. DRYSDALE AUSTIN.
101, St. Vincent Street, Glasgow,
Petitioner's Agent.

page_text: Manufactured therefrom.
I, JAMES DOUGLAS WATSON of 162 Renfield Street, Glasgow, in the County of
Lanark, North Britain, Chemist and Druggist, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :—
My Invention which relates to an improved method of annealing glass or articles
manufactured therefrom, has for its object to so anneal the Glass as to render it more
tenacious, tough, strong, hard, durable and of less susceptability to breakage.
My Invention consists in placing the vitrified Glass while in its plastic state into
vessels or moulds and thereafter depositing the same in a tank or pot of boiling tallow,
which is kept in its boiling state for a length of time, the time varying according to
the thickness of the Glass to be annexed, and thereafter allowing the boiling tallow to
cool slowly down before removing the glass from the said tank or pot so as to finish
the process.
The method of my annealing glass has been found to be very powerful and effective
and the annealed glass of great utility, and effecting a great saving by its hard,
tenacious, durable strong quality and of less susceptability to breakage, than glass
hitherto annealed.
The annealed glass by my process is especially applicable for Foot lights, Pavement
Gratings, Glass rails for railways, but is not confined to these articles as the annealed
glass is also applicable for any purpose or articles of manufacture, especially where
considerable usage, tear and wear, and weight is exercised.
The glass annealed by my process or method is less fragile than others and less
liable to expansion by heat, while it is also less liable to contraction by cold.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what. I claim is :-
The annealing of the glass or articles manufactured therefrom substantially in the
manner and for the purposes hereinbefore set forth.
JAMES DOUGLAS WATSON,
Applicant.