IMPROVEMENTS IN GALVANIC BATTERIES to be as follows:
Year: 1885

page_text: I ALEXANDER SCHANSCHIEFF of Gipsy Hill in the County of Surrey, Electrician,
do hereby declare the nature of my invention for "IMPROVEMENTS IN GALVANIC
BATTERIES to be as follows:-
"
I apply directly on to the positive plates of batteries an exterior coating of
collodion albumen gelatine, gluten, or such like substance to protect their surface
from the direct action of the liquid in which they are immersed and so avoid local
action and render the battery current constant. In batteries in which the positive
electrode is so coated no depolarizing paste or fluid is required and the battery may
be formed as a single liquid battery.
. Preferably I form the battery of zinc plates coated as above described and carbon
plates immersed in a saturated solution of Bichromate of Potass Sulphate of Copper
but other oxidising or a chlorodising liquid might be employed.
The negative plates can be of carbon platinum iron or other suitable substance.
In some cases the negative plates are also coated as well as the positive plates.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: I, ALEXANDER SCHANSCHIEFF of Gipsy Hill in the County of Surrey Electrician
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:-
I apply directly on to the positive plates of batteries an exterior coating of
collodion, albumen, gelatine, gluten or such like substance to protect their surface
from the direct action of the liquid in which they are immersed and so avoid local
action and render the battery current constant. In batteries in which the positive
electrode is so coated no depolarising paste or fluid is required and the battery may
be formed as a single liquid battery.
.
Preferably I form the battery of zinc plates coated as above described and carbon
plates immersed in a saturated solution of bichromate of potass or soda.
The negative plates can be of carbon, platinum, copper, iron or other suitable
substance and the liquid may be weak sulphuric acid or a solution of sulphate of
copper or other oxidising or a chloridising liquid.
In some cases the negative plates are also coated as well as the positive plates.
When I employ a chromate solution I prefer to coat the plate or plates with
gelatine and this I do by dipping them into a strong solution when the solution is
on the point of setting. I take the plates out of the gelatine solution and dry thei
thoroughly in the air. The process may be repeated to obtain a thicker coating.
When the plates are placed in the cells the chromate acts on the gelatine and
renders it insoluble.
With other than chromate solutions in the cells I prefer to employ collodion to
coat the plates-they are dipped into a strong collodion solution and then dried. To
obtain a thicker conting the process may be repeated. Batteries in which the
plates are thus coated will be found considerably more constant than batteries in
which the plates are uncoated.
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
A galvanic battery having its plates and more especially its positive plates
coated with collodion, gelatine or other like protective coating and immersed in a
solution of bichromate of potash or soda or other oxidising or chloridising liquid as
herein described.
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