IMPROVEMENTS IN SECONDARY DARWADING
Year: 1882

page_text: LETTERS PATENT to Alfred Tribe of Denbigh Road Notting Hill in the
County of Middlesex for an invention of "IMPROVEMENTS IN SECONDARY
DARWADING »
PROVISIONAL SPECIFICATION left by the said Alfred Tribe at the Office
of the Commissioners of Patents on the 1st April 1882.
ALFRED TRIBE of Denbigh Road Notting Hill in the County of Middlesex
"IMPROVEMENTS IN SECONDARY BATTERIES
"
This Invention relates to improvements in the construction of secondary batteries
and consists in the employment of a negative plate or plates composed of peroxide
of lead the same being either in a compressed or solidified form or in other suitable
condition.
.
In carrying out my Invention I either employ a negative plate consisting of
peroxide of lead in a solidified form or in a compressed condition or I employ
peroxide of lead in a nonsolidified or non-compressed form or in any other con
venient or suitable condition the same being contained in a perforated or porous
vessel or receptacle not acted upon electrically.
The peroxide of lead may be either employed direct in the condition before
mentioned or artificially precipitated peroxide of lead may be deposited upon the
surface or surfaces of the same, such peroxide of lead being formed from compounds
of lead by means of any well known electro-chemical action or by chemical
means
When the before mentioned negative plate or plates composed of peroxide of
lead are employed in Secondary Batteries the positive plate or plates employed.
therewith may be of any suitable element and the exciting liquid or electrolyte
may be similar to those now employed in secondary batteries

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alfred Tribe in the Great Seal Patent Office on the 30th September
1882.
ALFRED TRIBE of Denbigh Road Notting Hill in the County of Middlesex
"IMPROVEMENTS IN SECONDARY BATTERIES
"
.
This Invention relates to Improvements in the construction of secondary batteries
and consists in the employment of a negative plate or plates composed of peroxide
of lead, the same being either in a compressed or in other suitable condition.
In carrying out my Invention I either employ a negative plate consisting of
peroxide of lead in a solidified condition or in a compressed condition or I employ
peroxide of lead in a non-solidified or non-compressed condition or in any other
convenient or suitable form or condition the same being contained in a perforated
or porous vessel or receptacle not being a conductor nor easily acted upon
electrically or the peroxide of lead may be either employed direct in the condition
before mentioned or precipitated peroxide of lead may be deposited upon the
surface or surfaces of the peroxide of lead such peroxide of lead being formed from
compounds of lead by means of any well known electro chemical action or by
chemical means.
This Invention may be carried into effect according to one or other of the
following methods but others may be adopted.
A rectangular frame the same by preference being grooved may be employed
having three sides of prepared wood, slate, porcelain or any nonconducting
substance not easily acted upon by dilute sulphuric acid. The fourth side is
completed by the employment of a suitable conductor projecting out of the liquid,
and insulated on those parts which are in the liquid and not in contact with the
peroxide of lead.
Or the frame may be made entirely of any suitable conducting
substance coated on the outside with an insulating material. Or the frame may
be made entirely of prepared wood porcelain or slate a suitable conductor being
placed within the groove and passing round the frame or simply down one or both
sides partially or wholly.
· Into or upon one or other of these or some equivalent form of frame I place
peroxide of lead. The peroxide of lead if for example in the form of powder may
be placed into or upon the Retaining frame and subjected to pressure-The per-
oxide of lead may be employed in a dry or in a moistened condition either with
water or with dilute sulphuric acid. Or one or other of the non-conducting lead
compounds such for example as the mon-oxide of lead or the sulphate of lead may
be mixed with peroxide of lead and be subjected to pressure in the retaining frame
and then be converted into peroxide of lead by electrolytic action or a core of
compressed peroxide of lead may be fitted into the centre of the Retaining frame
and covered with some suitable lead compound which may be then converted into
peroxide of lead by electrolytic action as is well understood.
The negative element when prepared may be ensheathed or enclosed in artificial
or vegetable parchment felt porous earthenware or other equivalent materials.
.
When the before mentioned negative plate or plates composed of peroxide of
lead are employed in Secondary Batteries the positive plate or plates employed
therewith may be of any suitable element and the exciting liquids or electrolytes
may be similar to those now employed in Secondary batteries.
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into

page_text: effect I would observe in conclusion that what I consider to be novel and
original and therefore claim as the invention secured to me by the herein before in
part recited Letters Patent is :-
The employment, in the construction of Secondary Batteries, of a negative plate,
or plates, or element, or elements, composed, or consisting, of peroxide of lead;
substantially as hereinbefore described.
In witness whereof I the said Alfred Tribe have to this my Specification
set my hand and seal this twenty-eighth day of September One thousand
eight hundred and eighty two.
ALFRED TRIBE (L.S.)