An Improved Dry Battery.
Year: 1898

page_text: Date of Application, 10th May, 1898
Complete Specification Left, 19th Dec., 1898-Accepted, 18th Feb., 1899-
PROVISIONAL SPECIFICATION.
An Improved Dry Battery.
I, JOSEPH WEISS, of 6, Rindermarkt, Munich, in the Empire of Germany,
Merchant, do hereby declare the nature of this invention to be as follows:---
This improved dry battery is characterized on the one hand by an excellent
technical action, on the other hand by great simplicity.
The positive electrode of the battery consists of a zinc vessel which has oxide of
mercury rubbed over it in order to prevent the zinc being attacked by the contents
of the vessel. In this zinc vessel the negative element is embedded which consists
preferably of cylindrical or otherwise suitably shaped bodies which will be herein-
after more particularly described, and a carbon plate or rod connected therewith.
The said negative body is formed of a mass composed of a mixture of manganese
and graphite with a pure solution as a binding material, three volumes of
manganese being usually employed for one volume of graphite. The connection
between the carbon plate or rod and the negative body is preferably produced by
the mass of the latter being simply pressed round the carbon rod.
The interstice remaining between the negative body and the walls of the zinc
vessel is filled up with sawdust, mill dust or the like which is impregnated with a
50% solution of chloride of zinc. The whole is covered over at the top with a
mixture of asphalt and colophony which is run in and forms a cover through which
the carbon rod projects to the outside.
A small pipe is inserted through said cover to provide for the escape of any gases
developed in the sawdust filling.
73
3
.
1000
W. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.
An Improved Dry Battery.
I, JOSEPH WEISS, of 6, Rindermarkt, Munich, in the Empire of Germany,
Merchant, 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:-
This improved dry battery is characterised on the one hand by an excellent
technical action, on the other hand by great simplicity.
It is shown in the accompanying drawing in vertical section.

page_text: The positive electrode of the battery consists of a zinc or like vessel c. If a zinc
vessel be employed it has oxide of mercury rubbed over it in order to prevent the
zinc being attacked by the contents of the vessel. In this vessel the negative
element is embedded, which consists preferably of cylindrical or otherwise suitably
shaped bodies a which will be hereinafter more particularly described, and a carbon
plate or rod d connected therewith. The said negative body a is formed of a mass
composed of a mixture of powdered pyrolusite (natural manganese ore) and graphite
with a caustic soda lye or caustic potash lye as a binding material, three volumes
of pyrolusite being usually employed for one volume of graphite. The connection
between the carbon plate or rod d and the negative body a preferably produced
by the mass of the latter being simply pressed round the carbon rod.
C
The interstice remaining between the negative body a and the walls of the
vessel c is filled up with sawdust, mill dust, or the like which is impregnated with
-a 50% solution of chloride of zinc. The whole is covered over at the top with a
mixture of asphalt and colophony which is run in and forms a cover e through
which the carbon rod d projects to the outside.
A small pipe f is inserted through said cover to provide for the escape of any
gases developed in the sawdust filling.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed, I declare what I
claim is:-
A dry battery characterised by a carbon electrode (d) being combined with a
body composed of powdered pyrolusite and graphite embedded in a vessel (e) of
zinc or the like the latter being filled with sawdust, mill dust or the like saturated
with a solution of chloride of zinc, substantially as hereinbefore set forth..
Dated this 17th day of December 1908.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool; Agents for the Applicant.