IMPROVEMENTS IN PLATES OR ELECTRODES FOR SECONDARY OR STORAGE BATTERIES AND IN APPARATUS EMPLOYED IN THE MANUFACTURE OF THE SAID PLATES
Year: 1883

page_text: LETTERS PATENT to Robert Cunningham, of Tudor House, Kingston Hill, in
the County of Surrey for an Invention of "IMPROVEMENTS IN PLATES OR
ELECTRODES FOR SECONDARY OR STORAGE BATTERIES AND IN APPARATUS
EMPLOYED IN THE MANUFACTURE OF THE SAID PLATES
"
<
(Void by reason of the Patentee having neglected to file a Specification in
pursuance of the conditions of the Letters Patent.)
PROVISIONAL SPECIFICATION left by the said Robert Cunningham at the
Office of the Commissioners of Patents on the 20th July 1883.
ROBERT CUNNINGHAM of Tudor House Kingston Hill in the County of Surrey
IMPROVEMENTS IN PLATES OR ELECTRODES FOR SECONDARY OR STORAGE BATTERIES
AND IN APPARATUS EMPLOYED IN THE MANUFACTURE OF THE SAID PLATES.'
"
My Invention relates to the construction of plates or electrodes of storage
batteries which are composed of continuous lead tape similar to those described
in the Specification to Letters Patent granted to William Taylor and Frank King
dated 18th July 1882 N° 3409. According to the Invention described in the said
Specification the bands or tapes of lead of which the plates are composed are cut
from a solid block or disc in a lathe in such a manner that as the tape is cut it is
caused to turn at an angle to the cutting tool whereby the surface which is not
next the cutting tool is broken up or has a roughened or cellular surface imparted
to it which roughness may be increased more or less by varing the angle at which
the cutting tool is presented to the block or disc from which the tape is to be cut
the side of the tape which is next to the cutter remains smooth.
Now my Invention consists in producing tapes or plates of lead (to form
electrodes, for storage batteries,) with a roughened or cellular surface on both sides
so as to increase the extent of surface to be acted on by the electrolyte-In carrying
out my Invention for the production of lead tape I cut the tape from a block or
disc of lead in a similar manner to that described in the before mentioned
Specification but in order to produce the roughened or cellular surface on the side
7
حدة

page_text: of the tape next the cutting tool in addition to the roughening on the opposite side.
I employ a cutter having a notched or serrated cutting edge which as it divides
the strip or tape from the block or disc produces along the surface of the tape
corresponding grooves corrugations or gutters which will be further broken up by
the act of forming the tape into a plate.
The roughened or serrated cutting edge of the cutting tool may be produced by
grooving one side of the metal of which the cutter is formed and then tapering the
opposite side so as to form a chisel edge.
A plate or electrode is formed by winding the tape produced as herein before
described, round a mandril or former and pressing the coils or layers together so
as to give the necessary rigidity to the plate.
Instead of forming the electrode from lead tape as hereinbefore described plates
or sheets of the required size and thickness to form an electrode may be cut from
a block of lead in the manner described so as to have a roughened surface on both
sides or a number of thin sheets or plates (with roughened surfaces produced as
described may be combined together to form an electrode.