IMPROVE- MENTS IN THE MANUFACTURE OF CARBON PLATES
Year: 1883

page_text: LETTERS PATENT to Robert Applegarth of Mansion House Chambers, Queen
Victoria Street in the County of Middlesex for an Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF CARBON PLATES"
PROVISIONAL SPECIFICATION left by the said Robert Applegarth at the
Office of the Commissioners of Patents on the 19th June 1883.
ROBERT APPLEGARTH of Mansion House Chambers, Queen Victoria Street, in
the county of Middlesex "IMPROVEMENTS IN THE MANUFACTURE OF CARBON
PLATES"
This invention relates to Improvements in the manufacture of Carbon Plates.
In carrying this invention into practice I use powdered coal, coke, charcoal, &c,
mixed into a paste in the usual manner for the manufacture of carbon plates.
I provide suitable dies or moulds into which or through I press, by means of any
suitable power, the carbon paste.
The dies or moulds are so shaped that the carbon plates, when moulded or shaped
by means of them, are fluted, ribbed, grooved, or corrugated, and may be perforated
or not.
The great advantage of this form of carbon plate is that a greatly increased
surface is obtained and renders it unnecessary to use carbon plates of great length
and width, thus effecting a great economy of space.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Applegarth in the Great Seal Patent Office on the
18th December 1883.
ROBERT APPLEGARTH, of Mansion House Chambers, Queen Victoria Street, in
the county of Middlesex "IMPROVEMENTS IN THE MANUFACTURE OF CARBON
PLATES"
This invention relates to improvements in the manufacture of carbon plates
employed as electrodes in voltaic batteries the object being to obtain an increased
surface for such plates or electrodes without increasing their length or width,
whereby great economy of space is attained.
In carrying this invention into practice I use powdered coal, coke, charcoal or
other suitable form of carbon mixed into a paste in the manner usually employed
for the manufacture of carbon plates or electrodes. This carbon paste is then
shaped into the desired plate or electrode in such manner as to present a fluted,
ribbed, grooved or corrugated surface on one or both sides. The method I have
found most convenient and suitable for imparting the desired form to the plates
or electrodes is to press the paste by any suitable pressure into or through dies or
moulds shaped so as to impart thereto the aforesaid fluted, ribbed, grooved or
'corrugated form. The plates may be of any suitable form such as flat or curved
according to the purpose for which they are intended and they may be perforated,
or not, as desired. The carbon may be agglomerated by any suitable mode or
process but I prefer to mix it into a paste: It is obvious that the plates or
electrodes may be shaped and fluted, ribbed, grooved or corrugated by any suitable
means, and I make no claim to any particular mode, method or process of shaping,
fluting, ribbing, grooving or corrugating such plates or electrodes as such mode,
'method or process may be varied according to circumstances.
Having now described the nature of the said invention and the manner in
which the same is to or may be carried into effect, I would have it understood
that what I claim is :-
The construction of carbon plates or electrodes for voltaic batteries in such
manner that one or both surfaces shall be fluted, ribbed, grooved or corrugated,
and perforated or not, substantially as hereinbefore described and for the purpose
specified.
In witness whereof, I, the said Robert Applegarth have hereunto set my
hand and seal this eighteenth day of December in the year of our Lord one
thousand eight hundred and eighty-three.