AN IMPROVED ELECTRIC PILE
Year: 1883

page_text: LETTERS PATENT to John Clayton Mewburn of 169 Fleet Street in the City
of London Patent Agent and Consulting Engineer for an Invention of "AN
IMPROVED ELECTRIC PILE" Communicated to him from abroad by Michel
Azapis and Panagiotis Azapis both of 1 Boulevard St Denis Paris France
PROVISIONAL SPECIFICATION left by the said John Clayton Mewburn at
the Office of the Commissioners of Patents on the 10th April 1883.
"
JOHN CLAYTON MEWBURN of 169 Fleet Street in the City of London Patent
Agent and Consulting Engineer, "AN IMPROVED ELECTRIC PILE [Communicated
to me from abroad by Michel Azapis and Panagiotis Azapis both of 1 Boulevard
St Denis Paris France]
The improved electric pile which forms the subject of the present invention
differs from those generally employed by its special form the object of which is to
increase its surface, and by the employment of ordinary sulphuric acid (acidum
sulfurum dilitum) for the porous diaphragms or vessels.
The pile which has a diameter of say 9 Centimetres (about 3 inches) and a
height of say 24 centimetres (about 9 inches) is composed of four porous
diaphragms or vessels into each of which is inserted a piece of carbon of a diameter
one or two centimetres less than that of the diaphragins. Each of the diaphragms
carries externally a semi-cylindrical piece of zinc of the same height as the porous
vessels. The carbons are connected together by a single metallic piece and the zinc
pieces by another metallic piece. Into an outer vessel a solution of a suitable salt
by preference sea salt or salt of ammonia is introduced. Lastly into the porous
vessels are placed sulphuric acid at 25 to 45° and 5 per cent of ordinary nitre or
nitric natron (natre nitrique) or nitric acid.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Clayton Mewburn in the Great Seal Patent Office on the
9th October 1883.
JOHN CLAYTON MEWBURN of 169 Fleet Street in the City of London, Patent
Agent and Consulting Engineer "AN IMPROVED ELECTRIC PILE" (A communication
to me from abroad by Michel Azapis and Panagiotis Azapis both of 1 Boulevard
St Denis Paris, France)
The improved electric pile which forms the subject of the present invention and
which is represented in the annexed drawing differs from those generally employed
by its special form the object of which is to increase its surface, and by the
employment of ordinary sulphuric acid (acidum sulfurum dilitum) for the porous
diaphragms or vessels.
The pile which has a diameter of say 9 centimetres (about 3 inches) and a
height of say 24 centimetres (about 9 inches) is composed of four porous
diaphragms or vessels a a into each of which is inserted a piece of carbon 6 of a
diameter one or two centimetres less than that of the diaphragms. Each of the
diaphragms carries externally a semi-cylindrical piece of zinc c of the same height
as the porous vessels. The carbons bb are connected together by a single metallic
piece d, and the zinc pieces c c by another metallic piece f. Into the outer vessel g
a solution of a suitable salt, by preference sea salt or salt of ammonia, is introduced.
Lastly into the porous vessels are placed sulphuric acid at 25 to 45° and 5 per cent
of ordinary nitre or nitric natron (natre nitrique) or nitric acid.
In witness whereof I the said John Clayton Mewburn have hereunto set my
hand and seal this ninth day of October One thousand eight hundred and eighty
three.