Improvements in the Manufacture of Accumulators.
Year: 1899

page_text: Date of Application, 27th June, 1899
Complete Specification Left, 27th Mar., 1900-Accepted, 27th July, 1900
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Accumulators.
I, ALEXANDER SCHANSCHIEFF, of 10, Harrison Road, Halifax, in the County
of York, Electrical Engineer, do hereby declare the nature of this invention
to be as follows:-
:-
This invention relates to improvements in the manufacture of accumulator
plates and accumulators, and consists of plates of cast lead having spaces and
intersees, two plates being placed back to back as described in the Specification
of Letters Patent No. 18702 of the year 1898 granted to the present applicant
and Albert Edward Hodgson. The paste with which the grids are covered is
prepared specially for the work which the plate has to perform that is, I employ
one form of paste for the positive element and a different and special form for
the negative element.
According to this invention I employ a grid such as is described in Specification
of Letters Patent No. 18702 of the year 1898, but made of cast lead instead
of being stamped or pressed. The paste for the positive element or plate is made
of a mixture of minium and salts containing such substances as ammonium
sulphate (N.H*) S.0%, and lead sulphate P.b.S.O. in about the following pro-
portions.
84 % minium P.b₂04.
10% lead sulphate Pb.S.0.4.
6% ammonium sulphate (NH4) S.Oʻ.
"The paste for the negative element or plate is composed of a mixture of
litharge P.bO and carbonized sugar in about the following proportions.
66%litharge P.b.O.
33 % carbonized sugar.
The ingredients are pulverized and mixed with a weak solution of water and
sulpheric acid into the consistency of a putty like paste which
grids in the ordinary manner.
Luna IXUU
applied to the
BRIERLEY & HOWARD,
Penny Bank Chambers, Halifax,
Agents for the Applicant.
OL
Dated
day
Luno
BRIERLEY & HOWARD,
Penny Bank Chambers, Halifax,
Agents for the Applicant.
COMPLETE SPECIFICATION.

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention relates to improvements in the manufacture of accumulator
plates and accumulators and consists of plates of cast lead having spaces and
interstices, two plates being placed back to back as described in the Specification
of Letters Patent No. 18702 of the year 1898 granted to the present applicant
and Albert Edward Hodgson. The paste with which the grids are covered is
prepared specially for the work which the plate has to perform that is, I employ
one form of paste for the positive element and a different and special form for
the negative element.
Such being the nature and object of my said invention the following is a
complete description of same, reference being had to the accompanying drawings,
in which:-
Fig. 1 is a front elevation of part of one of the improved plates made of two
grids placed back to back.
Fig. 2 is a sectional end view of Fig. 1 the spaces and interstices being filled
with paste.
According to this invention the improved plate is made of two grids 1, 1
of cast lead the grids being cast with square holes 2, 2 in them the transverse
ribs 3 being of triangular section (see Fig. 2). The holes are preferably about
one quarter inch square and the ribs 3 about one eighth inch high and the outer
rib or edge 4 may be made slightly higher so that when the grids 1 are placed
face to face the apices of the triangular ribs 3 are kept apart, or the grids may
be kept apart by placing between them small spacing pieces of lead 5, 5. The
grids 1, 1 are placed face to face so that the points of intersection of the ribs 3
on one grid are opposite the centres of the holes 2 of the other grid and the
grids are then burnt or soldered together along their outer edges. At 6 is a
tongue for connecting purposes.
The paste for positive accumulator plates is made from the following ingredients
in about the undermentioned proportions.
84% of minium Pb30 by bulk.
10% of sulphate of lead PbS.0.* by bulk.
6% of sulphate of ammonia NH SO by bulk.
The paste of negative accumulator plates is made from the following ingredients.
in about the undermentioned proportions.
66% of litharge Pb.O by bulk.
33 % of carbonized sugar by bulk.
Both these mixtures I make into a dough like paste by a weak solution of
sulphuric acid and water, and the paste is laid onto and forced into the spaces
and intersees of the plates in the usual manner.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is: -
(1) The improved paste for positive accumulator plates as herein described.
(2) The improved accumulator plate combined with the improved positive
paste as herein described.
(3) The improved accumulator plate combined with the improved negative.
paste as herein described.