AN IMPROVEMENT IN SECONDARY VOLTAIC BATTERIES.
Year: 1882

page_text: LETTERS PATENT to Achilles Khotinsky at present residing at Cannon Street
Hotel in the City of London for an Invention of AN IMPROVEMENT IN
SECONDARY VOLTAIC BATTERIES.
L
PROVISIONAL SPECIFICATION left by the said Achilles. Khotinsky; at the
Office of the Commissioners of Patents on the 6th October 1882.
ACHILLES KHOTINSKY at present residing at Cannon Street Hotel in the City
of London "AN IMPROVEMENT IN SECONDARY, VOLTAIC BATTERIES."
C
In preparing the elements of secondary voltaic batteries it is usual to employ
one of the lower oxides of lead such as red lead, and then to subject the elements
to long continued electrolytic action whereby this substance is converted into a
higher oxide, the peroxide. According to my invention, I in the first place prepare
chemically the peroxide of lead, thus avoiding loss of time and expenditure of
electrical energy and I employ the peroxide so produced to form part of the battery
elements, the battery being thus at once ready to receive a charge of electricity.
The chemical process which I employ to produce the peroxide is to treat red lead
with dilute nitric acid, or to subject hydrated oxide of lead such as white lead to
the action of chlorine. The peroxide of lead produced in either of these ways is
made up with subdivided lead in any known form, for example it may be used in
combination with plates of spongy or fibrous lead or with network of lead or with
a mass of lead wires, pellets or granules.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Achilles Khotinsky in the Great Seal Patent Office on the 4th April
1883.
'
ACHILLES KHOTINSKY at present residing at Cannon Street Hotel in the City
of London. "AN IMPROVEMENT IN SECONDARY VOLTAIC BATTERIES."
In preparing the elements of secondary voltaic batteries, it is usual to employ
one of the lower oxides of lead such as red lead, and then to subject the elements
to long continued electrolytic action whereby this substance is converted into a
higher oxide, the peroxide. According to my invention, I, in the first place, prepare
chemically the peroxide of lead, thus avoiding loss of time and expenditure of
electrical energy, and I employ the peroxide so produced to form part of the battery
elements, the battery being thus at once ready to receive a charge of electricity.
The chemical process which I employ to produce the peroxide is to treat red. lead
with dilute nitric acid; or to subject hydrated oxide of lead, such as white lead, to
the action of chlorine. In both cases, as the lead oxide is heavy, it should be
kept stirred preferably by a revolving agitator, in the one case in mixture with
the dilute nitric acid, and in the other case with water through which a stream
of chlorine gas is caused to pass from a perforated pipe at the bottom of the
vessel.
The peroxide of lead produced in either of these ways is made up with sub-
divided lead in any known form, for example it may be used in combination with
plates of spongy or fibrous lead or with network of lead, or with a mass of lead
wires, pellets or granules.
In Witness whereof I the said Achilles Khotinsky have hereunto set my
hand and seal this nineteenth day of March in the year of our Lord One
thousand eight hundred and eighty-three.
ACHILLES KHOTINSKY (L.S.)