IMPROVEMENTS IN SECONDARY PROVISIONAL SPECIFICATION
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
PROVISIONAL SPECIFICATION left by the said Alfred Tribe at the Office
of the Commissioners of Patents on the 13th May 1882.
ALFRED TRIBE of Denbigh Road Notting Hill in the County of Middlesex
"IMPROVEMENTS IN SECONDARY BATTERIES"
This Invention relates to improvements in Secondary Batteries and consists
Istly in the employment for the production of the foundation plates or supports for
the negative element employed in such batteries of metals which have been to a
greater or less degree converted into sulphides arsenides oxides Phosphides or other
compounds not easily acted upon by Electrolytic action. Plates or supports so
prepared are employed as foundation plates or supports for the negative elements
in secondary Batteries
My Invention further relates to the preparation of a positive element to be
employed in secondary batteries and consists in the use of compressed consolidated
or agglomerated precipitated lead or of lend in a finely divided condition which
precipitated lead or lead in a finely divided condition I submit to pressure in
order that a porous compressed agglomerated or consolidated Element may be
obtained capable of being employed as the positive element 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
13th November 1882.
the
ALFRED TRIBE of Denbigh Road Notting Hill in the County of Middlesex
"IMPROVEMENTS IN SECONDARY BATTERIES "
This Invention relates to Improvements in secondary Batteries, and consists in
the employment for the production of the foundation plates or supports of or for
the negative element employed in such batteries of Lead which has been to a
greater or less degree converted into sulphides arsenides, oxides, phosphides or
other compounds of an electro negative character Plates or supports so prepared
are employed as foundation plates or supports for the negative elements in
secondary batteries.
Supporting or foundation plates as now employed are highly electropositive
to the active material formed or placed on or upon or brought into contact with
them and consequently local circuits aro set up which cause loss of the energy
stored and the destruction of the supporting or foundation plate or plates.
Now the object of my Invention is to prevent this loss of energy and also to
prevent the destruction of the foundation plates or supports and this is attained by
exalting the electro-negative character of the supporting or foundation plates. In
order to effect this I employ supporting or foundation plates of lead more or less
converted into sulphides oxides arsenides phosphides or other compounds of an
electro negative character
In carrying out this part of my Invention I employ by preference lead more or
less converted into sulphide or oxide by one or other of the following processes
but other methods may be employed.
The lead may either be brought into contact with molten sulphur and be heated
to a point below the melting point of lead. Or the lead may be converted super-
ficially into sulphide by the employment of a solution of sulphur and the
subsequent application of heat in order that the desired superficical sulphurization
may be effected.
Or the lead may be heated in the vapour of sulphur until its
surface is converted into lead sulphide the object of each and of all of these
operations being to couvert the surface of the lead into lead sulphide.
Or the lead may be melted with sulphur and the product thus obtained may be
cast into the desired form or forms. The foundation plates or supports thus
obtained may if necessary be further treated by any of the preceding methods in
order to further to convert their surfaces into sulphides and thus still more
thoroughly to ensure if necessary the conversion of the external surface or surfaces
into sulphide.
Or lead may be superficially converted into oxide as follows or otherwise
The foundation plates or supports may be first superficially converted into oxides
by electrolysis and then when such process has been employed pressure or friction
is applied to the surface or surfaces. These operations may be repeated until the
surface or surfaces of the foundation plates or supports undergo practically no
further oxidation. Or lead may be converted into phosphides or arsenides as
follows or otherwise To the molten metal phosphorous or arsenic may be added
in such quantity as is required to produce the desired combinations and the
products thus obtained may be cast into the required form or forms.
When foundation plates or supports prepared by either one or other of the
methods herein before described are employed in secondary Batteries that portion
of the foundation plates or supports not brought into contact with the peroxide of

page_text: lead but immersed in the exciting liquid is by preference previously protected by
means of an insulating material.
What I claim is the use and employment of compounds of lead as hereinbefore
mentioned substantially in the manner herein described in and for the construction
of foundation plates or supports of or for the negative elements in secondary
Batteries.
In witness whereof I, the said Alfred Tribe have to this my Specification
set my hand and seal this tenth day of November One thousand eight
hundred and eighty two.
ALFRED TRIBE (LS.)