Improvements in Electrodes for Storage Batteries.
Year: 1897

page_text: Date of Application, 19th Oct., 1897-Accepted, 20th Nov., 1897
COMPLETE DIEULTIVATION.
Improvements in Electrodes for Storage Batteries.
I, HERBERT SAMUEL LLOYD, of 3641 Filbert Street, City of Philadelphia, State
of Pennsylvania, United States of America, Electrician do hereby declare the
nature of this invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement:-.
My invention relates to certain improvements in storage batteries, and has for
its object to provide a simple and economical form of electrode in which an
extremely large surface area is exposed to the action of the electrolyte as more fully
set forth hereinafter.
In the accompanying drawing:
Fig. 1 is a perspective view of an electrode constructed in accordance with my
invention.
Fig. 2 is a transverse sectional view of the same on an enlarged scale on the
line 2-2, Fig. 1.
Fig. 3 is a similar view illustrating a modification of the invention, and
Fig. 4 is a sectional view of a portion of the electrode illustrating the employment
of a temporary division plate in its manufacture.
The electrode forming the subject of my invention is formed of lead, or an alloy
of lead and antimony, and the object of the invention is to so constuct the electrode
as to expose an extremely large area to the action of the electrolyte.
The electrode comprises a supporting frame, A, formed of lead, or an alloy
thereof, and between the opposite edges of the frame extend a series of plaited
leaden rods or strips, a, each strip being parallel with the other and preferably
slightly out of contact with each other so that the electrolyte may have access to
the entire surface of each rod or strip.
In larger electrodes where the length of the rods or strips, , would be likely to
break I prefer to provide the frame with transverse partitions or ribs which divide
the electrode into a series of sections, and in each section are placed the rods or
strips, a, as will be readily understood.
In some instances the rods or strips may be woven together, or may be twisted
or coiled to afford additional strength without material decrease in the exposure
of the surface area of the single rod or strips. Between the two or more layers
I place a perforated leaden plate, c, as illustrated, the single or plaited rods or
strips coming into contact therewith at times and being supported thereby to a
considerable extent. The use of this intervening perforated plate is particularly
advantageous in the upper of the two horizontally disposed electrodes or in all
cases where the electrodes are arranged in cells horizontally.
In Fig. 4 I have illustrated a construction in which a partition, d, of cardboard,
or other destructible material, is temporarily placed between the two layers of
the electrode during the process of manufacture in order to prevent their coming
into direct contact in the process of manufacture, and thus reduce the acting
surface. When placed in the battery the acid of the electrolyte immediately
attacks this partition, d, and destroys the same.
It is clear that the wires or strips of the electrode need not necessarily be plaited,

page_text: woven, twisted, or coiled as described, but he merely single strands as shown in
Fig. 3 stretched in series from opposite sides of the frame, though they are prefer-
ably plaited, twisted coiled, woven or so formed as to present the greatest possible
surface for-the action of the fluid.
The electrode above described is of very simple, and economical construction,
and the surface area exposed to the action of the electrolyte is much greater in pro-
portion to the cubic content of the electrode than in any of the ordinary electrodes
with which I am familiar...
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As the primary and secondary actions and reactions which take place during the
discharge of a current into and from the battery are well known, it is not deemed
necessary to describe them here, the present invention consisting in the construe-
tion of the electrode as described.
Having now particularly described and ascertained the nature of my said
invention I declare that what I claim is:-
1. An electrode comprising a frame, two or more layers or strips formed of lead
or an alloy thereof extending between the side bars of the frame, and a perforated
leaden plate situated between such layers, substantially as specified.
2. An electrode comprising a frame and two layers of rods or strips of lead or an
alloy thereof, said rods or strips being plaited in series and extending between the
side bars of the frame, and a perforated leaden plate situated between the said
layers, substantially as specified.
Dated this 19th day of October 1907
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.