Year: 1887

page_text: Date of Application, 24th Oct., 1887
Complete Specification Left, 18th Aug., 1888
Complete Specification Accepted, 18th Oct., 1888
I, ALBERT STETSON, of 121 Madison Avenue, New York, United States of America
Electrician, do hereby declare the nature of this invention to be as follows:-
My invention relates to electric accumulators or secondary batteries, and is designed
to increase the efficiency and diminish the weight of the same as compared with those
heretofore employed.
According to my said invention, instead of inserting the peroxide of lead into holes
or cavities in lead plates, or attaching the same to the surfaces of lead plates as
heretofore practised, I enclose or engage the peroxide of lead or other active material
in a sheath or covering of lead.
In carrying my said invention into practice, I proceed as follows. that is to say,
I form a thin sheath or case of lead either by casting, or by bending a sheet of lead,
or in any other convenient manner. Into this sheath or case, I introduce the peroxide
of lead or other active material. Or I take a plate or slab of peroxide of lead or
similar material and wrap a sheet of lead around the same, or place a sheet of lead on
each side thereof. Or I form a sheath or case of lead upon the peroxide plate by
chemical deposition.
To permit access of the liquid in the battery to the peroxide, I puncture the lead
sheath or case or the lead plates by punching or otherwise, thus forming holes which
extend either completely through the said sheath or case and the peroxide, or only
through one side of the said sheath or case and partially through the peroxide. This
puncturing is preferably so performed that small parts or pieces will be partially
detached from the lead sheath or case and will be bent inward so that they project into
the peroxide and thus ensure the retention of the same within its sheath or case.
On charging the battery or accumulator, these turned-in parts or pieces of the lead
sheathing and the edges around the holes formed therein will be converted into
peroxide so that the said sheathing and the peroxide plate will be chemically united.

page_text: I sometimes employ two oxides of lead, viz., a higher oxide such as minium or red
lead, and a lower oxide such as litharge, the higher oxide being employed as the
positive plate and the lower oxide as the negative plate.
The said sheath or case, or the plate, or slab of active material, or both are provided
with suitable means for suspending or supporting them in the cell or box of the
battery.
Dated this 24th day of October 1887.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Electric Accumulators or Secondary Batteries.
I, ALBERT STETSON of New York, County and State of New York, 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 electric accumulators or secondary batteries, and is designed
to increase the efficiency and diminish the weight of the same as compared with those
heretofore employed.
According to my said invention, instead of inserting the peroxide of lead into holes
or cavities in lead plates, or attaching the same to the surfaces of lead plates as
heretofore practised, I enclose or encase the peroxide of lead or other active material
in a sheath or covering of lead.
In carrying my said invention into practice, I proceed as follows; reference being
made to the accompanying Drawings in which Fig. 1 is a perspective view part being
broken away and Fig. 2 a vertical section on line . . I form a thin sheath or case
of lead A either by casting, or by bending a sheet of lead, or in any other convenient
manner. Into this sheath or case, I introduce the peroxide of lead or other active
material B. Or I take a plate or slab of peroxide of lead or similar material, and
wrap a sheet of lead around the same, or place a sheet of lead on each side thereof.
Or 1 form a sheath or case of lead upon the peroxide plate by chemical deposition.
To permit access of the liquid in the battery to the peroxide, I puncture the lead
sheath or case or the lead plates by punching or otherwise, thus forming holes C
which extend either completely through the said sheath or case, and the peroxide, or
only through one side of the said sheath or case, and partially through the peroxide,

page_text: This puncturing is preferably so performed, that small parts or pieces will be partially
detached from the lead sheath or case and will be bent inward as shown at è so that
they project into the peroxide, and thus insure the retention of the same within its
sheath or case.
On charging the battery or accumulator, these turned-in parts or pieces of the lead
sheathing A and the edges around the holes B formed therein will be converted into
peroxides, so that the said sheathing and the peroxide plate will be chemically united.
I sometimes employ two oxides of lead, namely, a higher oxide such as minimum of
red lead, and a lower oxide such as litharge, the higher oxide being employed as the
positive plate, and the lower oxide as the negative plate.
The said sheath or case A, or the peroxide plate, or both are provided with suitable
means for suspending or supporting them in the cell or box of the battery.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, I declare that what I claim is —
A storage battery plate consisting of a plate or mass of active material enclosed in a
perforated case or sheath of thin metal.
Dated this 17th day of August 1888.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Filing Agents for the Applicant.