Improvements relating to Galvanoplastics or the Electro-deposition of Metals.
Year: 1892

page_text: Date of Application, 17th Feb., 1892
Complete Specification Left, 2nd Nov., 1892-Accepted, 31st Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements relating to Galvanoplastics or the Electro-deposition
of Metals.
I, PIERRE HENRY BERTRAND, of 31, Boulevard Henri IV, Paris, in the
Republic of France, do hereby declare the nature of this invention to be as
follows:-
My invention relates to galvanoplastics or the electro-deposition of metals and
consists in the use of orthophenol-sulphurous acid, metaphenol-sulphurous acid
and paraphenol-sulphurous acid which are powerful solvents of salts of tin and
easily soluble in water and can be advantageously employed in place of
pyrophosphate of soda for all galvanoplastic plating purposes.
When employed with or without the aid of electricity in a hot or cold condition
with or without zinc they furnish on all metals a plating of remarkable durability
and beauty. This plating is morcover absolutely sound. The said materials are
distinctly advantageous when employed upon wrought and cast iron as they do not
almost immediately form sulphurets in their combination with these metals as is
the case with sulphuric acid.
They will also dissolve the salts of copper and allow of obtaining upon wrought
and cast iron a copper coating of great solidity.
They will dissolve the salts of zinc and offer the same advantages. They also
dissolve the salts of silver.
Dated the 17th day of February 1809
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Galvanoplastics or the Electro-deposition
of Metals.
I, PIERRE HENRY BERTRAND, of 31, Boulevard Henri IV, Paris, in the
Kepublic of France, 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 relates to galvanoplastics or the electro-deposition of metals and
consists in the use for all galvanoplastic plating purposes of orthophenol-sulphurous
acid, metaphenol-sulphurous acid and paraphenol-sulphurous acid which are
powerful solvents of salts of tin and easily soluble in water and can be advan-
tageously employed in place of pyrophosphate of soda for the said purposes.
When employed with or without the aid of electricity in a hot or cold condition
with or without zinc they furnish on all metals a plating of remarkable durability
and beauty. This plating is moreover absolutely sound. The said materials are
distinctly advantageous when employed upon wrought and cast iron as they do not
almost immediately form sulphurets in their combination with these metals as is
the case with sulphuric acid.
They will also dissolve the salts of copper and allow of obtaining upon wrought
and cast iron a copper coating of great solidity.
They will dissolve the salts of zinc and offer the same advantages. They also
dissolve the salts of silver.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The use in galvanoplastics or the electro-deposition of metals of orthophenol-
sulphurous acid, metaphenol-sulphurous acid and paraphenol-sulphurous acid sub-
stantially as hereinbefore described.
Dated this and dow of November 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.