CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OF THE PLATES OF SECONDARY OR ELECTRICAL STORAGE BATTERIES
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Thomas Cuttriss at the Office of
the Commissioners of Patents on the 2nd August 1882. Partly a communi-
cation to him from abroad by Charles Cuttriss, of Duxbury, Massachusetts,
in the United States of America, and partly his own invention.
THOMAS CUTTRISS, of Leeds, in the County of York, "CERTAIN IMPROVEMENTS
IN THE CONSTRUCTION OF THE PLATES OF SECONDARY OR ELECTRICAL STORAGE
BATTERIES" partly a communication to me from abroad by Charles Cuttriss, of
Duxbury, Massachusetts, in the United States of America, and partly my own
invention.
This invention relates to certain improvements in the construction of the plates
of Secondary or Electrical Storage Batteries.
The object of the Invention is to increase the capacity of the plates by making
them of a porous or spongy nature and so that the active material shall become a
part of the plate and continue throughout its dimensions.
The Invention consists in employing Soda, either in its simple or.compound
forms, or other suitable or equivalent material, either mixed with red lead, peroxide
of lead, chromate of lead, or other salts or oxides of lead, or by itself, and preferably
in a granular state or pieces of moderate size, as a material with which to fill an
ingot, or suitable mould, into which, when duly heated, melted lead is poured so as
to fill up the interstices between the granules or pieces of Soda or other material
with which the ingot is filled, and afterwards removing the Soda by boiling in
water, or other suitable means. The plate then being filled with small holes or
cavities and perfectly porous throughout its mass.
Or, instead of pouring the lead into an ingot, the soda or other material can be
stirred into melted lead when about the point of settling or solidifying, and then,
when placed on a suitable slab or table, rolled out into a sheet.
The plate can then be formed or peroxidized in the usual manner
A mode of procedure which has been found to answer well, is to take a quantity
of soda and while drying it incorporate a quantity of the salts or oxides of lead, so
that when it becomes a pasty or doughy mass it can be rubbed through a sieve to
form granules; and afterwards thoroughly dry it and sift through a finer sieve to
[Price 2d1

page_text: remove the fine particles or dust; the ingot, which is of suitable dimensions,
is made deeper than the plate that is to be cast in it, so as to allow a head of lead
of several inches, which makes the plate more compact. When the Soda, or other
material, is in the ingot, a piece of iron is placed on it to prevent the soda rising
up the ingot as the lead is poured in. Previous to pouring in the lead the ingot
and contents are heated to about the melting point of lead.
After the plate has been removed from the ingot the Soda can be removed by
any suitable treatment, leaving a plate porous throughout its mass; and if oxides
or salts of lead were previously mixed with the soda they are left in the plate in a
porous condition and intimately connected with the outer lead walls of each separate
cavity; the said walls forming a conducting medium through which electrical
connection is made.
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