Improvements in or relating to Galvanic Batteries.
Year: 1899

page_text: Date of Application, 25th Aug., 1899-Accepted, 11th Nov., 1899
COMPLETE SPECIFICATION.
Improvements in or relating to Galvanic Batteries.
A communication from JOSEPH TRILLET, of 9, Rue des Petits-Hôtels, Paris, in
the Republic of France, Electrician.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of London,
Chartered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:
This invention relates to improvements in galvanic batteries, its object being
the provision of a cell capable of giving a large current and therefore specially
suited for purposes of lighting and the production of motive power.
In the accompanying drawing the battery is represented by way of example:
Figure 1 being a vertical section of the cell on the line X Y of Figure 2, and
Figure 2 a horizontal cross section.
The galvanic cell consists of an outer vessel A made of glass, stoneware or like
material, containing a carbon electrode arranged in two groups B and C, the
carbon plates being united with each other by being set with their upper and
lower ends in rings B' and C¹ of cast metal, generally of lead, and forming
annular crowns of different diameters.
The two groups are united at their base by means of leaden radial bars, D,
while on the upper crown B₁ a binding screw or similar connector E is soldered.
In the space between the outer and inner members of the carbon electrode B C
is arranged the cylindrical porous vessel F¹ containing between two concentric
cylindrical walls the space for the negative electrode. The two cylindrical walls
are united at the bottom F, and are so arranged as to leave the central part
entirely free for the introduction of the carbon plate group C.
This combination has been arranged with a view of making use simultaneously
of the two sides of the zinc plate G placed in the porous vessel.
This arrangement can be reversed by placing the depolarising liquid and the
carbon plates inside the porous vessel, while one zinc cylinder is placed into the
central open space, and the other is arranged around the outside wall of the
porous vessel.
The bottom of the porous vessel is provided with recesses K for the passage of
the joining bars D and the circulation of the liquid.
The exciting liquid contained in the porous vessel consists of ordinary water
with a little sulphuric acid added to it, the depolarising liquid contained in the
outer vessel A. and the central part of the cell consists of a solution of bi-chromate
of sodium in considerably diluted sulphuric acid.
Having now particularly described and ascertained the nature of the said
invention, as communicated to me by my foreign correspondent, and in what
manner the same is to be performed, I declare that what I claim is:
-
1. A galvanic cell comprising a positive electrode made of two annular groups
of different diameters which consist of carbon plates united at their ends by

page_text: crowns of metal, a negative electrode, formed by an annular cylinder of zinc
placed in an annular porous vessel with double walls which is placed between the
two groups of the positive electrode, and exciting and depolarising liquids, sub-
stantially as described.
2. A galvanic cell as claimed in Claim 1 in which the carbon electrode is placed
in the porous vessel, and two zine cylinders are placed one in the centre of the cell,
and the other round the outside of the porous vessel substantially as described.
3. The complete galvanic cell substantially as described and illustrated in the
accompanying drawings.
Dated this 25th day of August 1899.