Improvements in or connected with Porous Cells or Receptacles for Galvanic Batteries.
Year: 1897

page_text: Date of Application, 9th Nov., 1897
Complete Specification Left, 9th Aug., 1898-Accepted, 1st Oct., 1898
Improvements in or connected with Porous Cells or Receptacles for
Galvanic Batteries.
I, MICHAEL MARTIN BAIR, of 33, Rue de Lorraine, Levallois Perret, Paris, in
the Republic of France, Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in or connected with porous cells or
receptacles for galvanic batteries.
There are several substances which act efficiently as depolarizing agents but
which when placed in a porous cell or receptacle give rise, in the period prior
to the cell being brought into use, to leakage or "sweating," owing to their
hygroscopic character, and this militates to a great extent against their use.
Now my invention consists in preventing this action by surrounding the porous
celis, bags or other porous receptacles of whatever nature they may be, with a
hermetic impermeable or moisture-proof covering, sheath, or coating which com-
pletely protects them and their contents from the action of the surrounding
atmosphere and of the moisture therein.
This cover or sheath is removed on the porous cell being placed in the battery,
thus allowing the said porous cell to be used exactly as is an ordinary porous
cell.
The covering or sheath may be made of paper, woven fabric or other suitable
material rendered impervious by any appropriate process, or it may be of such a
nature that it will dissolve in the battery fluid.
The foregoing particulars are given however solely by way of example as the
manner in which the covering, sheath or coating is made up may be varied as
desired so long as it ensures that the porous cells are efficiently protected from
the action of the air and from atmospheric moisture.
Improvements in or connected with Porous Cells or Receptacles for
Galvanic Batteries.
I, MICHAEL MARTIN BAIR, of 33, Rue de Lorraine, Levallois Perret, Paris, in
the Republic of France, Manufacturer, do hereby declare the nature of this
Price 8d1

page_text: invention. and in what manner the same is to be performed, to be particularly
described and ascertained, in and by the following statement ;-
-
This invention relates to improvements in or connected with porous cells or
receptacles for galvanic batteries.
There are several substances which act efficiently as depolarizing agents but
which when placed in a porous cell or receptacle give rise, in the period prior
to the cell being brought into use, to leakage or sweating," owing to their
hygroscopic character, and this militates to a great extent against their use.
Now my invention consists in preventing this action by surrounding the porous
cells, bags or other porous receptacles of whatever nature they may be, with an
hermetic impermeable or moisture-proof covering, sheath, or coating which com-
pletely protects them and their contents from the action of the surrounding
atmosphere and of the moisture therein. This covering or sheath is adapted to
be removed from the porous cell when the latter is to be placed in the battery,
thus allowing the said porous cell to be used exactly as an ordinary porous cell.
Or the said cover may be of such a nature that it will dissolve in the battery
fluid so that its prior removal is unnecessary.
In carrying out my invention I may employ a cover or sheath constructed
in any desired manner and of any suitable material, either naturally impervious
or rendered impervious by being suitably treated. For example, according to
one method of carrying my invention into effect, I employ a covering made of
paper, woven fabric or like material rendered impervious by any appropriate
process. This covering completely envelopes the porous part of the cell or recep-
tacle, and is pasted, sealed or otherwise secured to the upper or non-porous part
of the cell in such manner as to form an hermetic joint.
The manner in which the covering, sheath or coating is made up may obviously
be varied as desired so long as it ensures that the porous cells are efficiently
protected from the action of the air and from atmospheric moisture.
When the porous cell is required for use, that is to say when it is to be mounted
in the battery, all that is necessary, if the cover or sheath be not soluble in the
battery fluid, is to tear off or otherwise remove such cover before immersing the
cell in the said fluid. The indication or directions required for this purpose, may
be inscribed upon the cover or sheath itself.
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 in connection with a porous cell or receptacle for galvanic batteries, is:-
A cover or sheath suitably prepared to render it impervious to moisture and
applied to the porous cell in such manner as to permit of its being readily
removed, substantially as described.
Dated this 9th day of August 1900
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.