An Electrical Accumulator.
Year: 1899

page_text: Date of Application, 14th July, 1899
Complete Specification Left, 17th Apr., 1900-Accepted, 14th July, 1900
PROVISIONAL SPECIFICATION.
An Electrical Accumulator.
RALEIGH HILLS, 189, Lozells Road, Handsworth, Staffordshire, Electrical
Engineer, JOSEPH MATTHEWS, Liberty Villa, Grange Road, Kingsheath,
Worcestershire, Electrical Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
It consists, in the substitution of a thin plate of aluminium for the thick lead
plate, pasted with litharge & red lead, for the negative element, used in the
ordinary accumulator, also the substitution of a solution of zinc sulphate and
water, for the ordinary dilute sulphuric acid. The action of this accumulator
is as follows:
When at rest the solution consists of
ZnSO+OH₂
when the charging current commences to pass through decomposition takes
place as follows: metalic Zn is deposited on the aluminium plate & the OH,
is decomposed thus changing the solution to H, SO₁ + OH,
In which case H is liberated & the unites with the PBO forming PBO
in the cavities of the positive plate which takes the form of a grid, as in the
ordinary type of accumulator.
The action during discharge is as follows:
4
The H, SO, attacks the Zn deposited on the aluminium plate thus forming
ZnSO, in solution, for each two atoms of H liberated at the negative plate,
through the formation of ZnSO₁, one atom of O is liberated at the positive
plate thus converting PBO, to a lower oxide PBO.
Dated this 12th day of July 1899.
TT וזיוזוך זז ז ריידזי
RALEIGH HILLS.
JOSEPH MATTHEWS.
An Electrical Accumulator.
1r.
RALEIGH HILLS, Electrical Engineer, late of 189, Lozells Road, Handsworth,
Staffordshire, 22, Beauchamp Square, Leamington, Warwickshire, JOSEPH
MATTHEWS, Electrical Engineer, 209 Grange Road, Kings Heath,
Birmingham, Worcestershire, late of Liberty Villa, Grange Road, Kings Heath,
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:-
_
Our invention relates to improvements in an electrical accumulator designed

page_text: chiefly with the object of reducing weight to a minimum. Our invention con-
sists in the substitution of a plate of aluminium for the negative element, in
place of the ordinary lead or pasted plate as used in the so called ordinary
accumulator, and likewise the substitution of a solution of zinc sulphate
ZNSO OH, in place of a solution of dilute sulphuric acid we use as the
positive element the ordinary perforated lead plate pasted with red lead &
litharge.
Our said invention comprises moreover the further improvements hereinafter
described.
In the accompanying drawings
Figure I is a plan shewing the arrangement of plates.
Figure II is a side elevation.
Figure III is an end elevation.
Like letters indicate corresponding parts throughout the drawings.
A is the aluminium plate or negative element.
B is the perforated lead plate or positive element.
C is any suitable insulator.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is: —
1. In an electrical accumulator an aluminium plate as the negative element
immersed in a solution of zinc sulphate and water in combination with an
ordinary perforated lead plate pasted with red lead and litharge as the positive
element.
RALEIGH HILLS.
JOSEPH MATTHEWS.