IMPROVEMENTS IN VOLTAIC OR GALVANIC BATTERIES
Year: 1881

page_text: LETTERS PATENT to Theophilus Coad, of 4, South Street, Finsbury, in the
County of Middlesex, Electrician, for an Invention of "IMPROVEMENTS IN
VOLTAIC OR GALVANIC BATTERIES."
PROVISIONAL SPECIFICATION left by the said Theophilus Coad at the
. Office of the Commissioners of Patents on the 7th November 1881.
THEOPHILUS COAD, of 4, South Street, Finsbury, in the County of Middlesex,
Electrician. "IMPROVEMENTS IN VOLTAIC OR GALVANIC BATTERIES."
This Invention relates to the construction of what I term a multiple carbon
battery, the object being to obtain greater constancy and electro motive force than
hitherto, and also to provide improved means for filling and discharging the cells
of galvanic batterics.
In carrying out my Invention I form the carbon electrode of a number of plates
of carbon, separated from one another by carbon distance pieces, the whole being
connected together by carbon bolts and nuts; or the multiple carbon electrode may
be formed by moulding or otherwise. By the employment of an electrode of this
construction greater surface is obtained than hitherto. The inner or porous cell is
furnished near the top thereof with a discharge tube or spout which passes through
an opening provided for the purpose in the outer cell, or over the top of the outer
cell. The said outer cell is also provided with a suitable discharge spout; a stopper
for each spout being provided. The porous pot containing the carbon electrode is
permanently hermetically sealed, a charging opening with stopper being provided,
and the space between the porous pot and the outer cell is closed by a reinoveable
cover fitting liquid tight, and provided with a charging opening closed by a
stopper.
.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Theophilus Coad in the Great Seal Patent Office on the 5th May
1882.
THEOPHILUS COAD, of 4, South Street, Finsbury, in the County of Middlesex,
Electrician. IMPROVEMENTS IN VOLTAIC OR GALVANIC BATTERIES.'
<<
"3
This Invention relates to the construction of what I term a multiple or compound
carbon battery, the object being to provido a larger negative or depolarizing surface
than hitherto, thereby ensuring greater constancy and electro-motive force than
has hitherto been obtained, and also to provide improved means for filling and
discharging the cells of galvanic batteries.
In carrying out my Invention I form the carbon electrode of a number of plates
of carbon, separated from one another by carbon distance pieces, the whole being
connected together by carbon bolts and nuts; or the multiple carbon electrode may
be forined by moulding or otherwise. By the employment of an electrode of this
construction greater surface is obtained than hitherto. The inner or porous cell is
furnished near the top thereof with a discharge tube or spout which passes through
an opening provided_for_the_purpose in the outer cell or over the top of the outer
cell. The said outer cell is also provided with a suitable discharge spout, a stopper
for each spout being provided. The porous pot containing the carbon electrode is
permanently hermetically sealed, a charging opening with stopper being provided,
and the space between the porous pot and the outer cell is closed by a reinoveable
cover fitting liquid tight, and provided with a charging opening closed by a
stopper.
But to make my Invention better understood, I will proceed to describe the
same by reference to the accompanying Drawing, in which Figure 1 is a front
elevation, and Figure 2 a plan of a battery constructed according to my Invention;
Figure 3 is a sectional elevation on line A, B, of Figuro 4; and Figure 4 is a plan
of the same, the hermetical covering being removed. Similar letters in all the
Figures represent similar parts.
a, a, a, are the plates of the carbon electrode; b, the distance pieces separating
them, and e the bolt, and d the nut connecting them together, the whole forming
the multiple carbon electrode; or it may be formed in one piece by moulding or
otherwise; e is the inner or porous cell; f, the discharge tube or spout of the same
passing through an opening in the outer cell g, as shewn (or it may pass over the
top of the same); h is the discharge tube or spout of the outer cell g; i is the
hermetically closing cover of the inner or porous pot e; and jis the charging
opening in the same; %, is the removeable cover fitting liquid tight over the
space between the porous pot e, and the outer cell g; and is the charging
opening with which it is provided; m is the ordinary zinc electrode; n and othe
connections of the carbon and zinc electrodes respectively; suitable stoppers are
provided for closing the charging openings j and Z.
Any ordinary fluids may be employed for these batteries.
Having thus described my said Invention and the best means with which I am
acquainted for carrying the same into effect, I would have it understood that
what is claimed and intended to be protected by the herein-in-part recited Letters
Patent is,-
Firstly. The manufacture and use of volvaic or galvanic batteries, constructed
substantially as herein before described and represented in the accompanying
Drawing.

page_text: Secondly. The construction and employment in voltaic or galvanic batteries of
the berein-described multiple carbon electrode, consisting of a number of plates of
carbon whether connected together or formed in one piece, as herein before described
and represented in the accompanying Drawing.
In witness whereof, I, the said Theophilus Coad, have hereto set my hand
and seal, this Fourth day of May, in the year of our Lord One thousand
eight hundred and eighty two.
T. COAD.
(L.S.)