Improvements in Secondary Electric Batteries or Aceumulators.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Secondary Electric Batteries or Aceumulators.
We, SAMUEL WALTER HART, Gentleman, and EDWARD JAMES CLARK, Engineer,
both of Crispin's Wharf, Marsh Gate Lane, Stratford, in the County of Essex,
do hereby declare the nature of this invention to be as follows:-
Our invention relates to certain improvements in secondary electric batteries
or accumulators and has for its objects firstly; the rigid arrangement and in-
sulation of the two sets of plates, (+ and -) forming a cell, so that the risk of
deterioration by disintegration is minimised, and the plates may be removed
bodily from the cell when necessary. Secondly, the provision of a coupling for
connecting the cells to form a battery; which maintains perfect contact and
rigidity, and a greater degree of conductivity than obtains in the case of couplings
as heretofore constructed and used.
As
In order to render the description of our invention more clearly, we have
appended the accompanying sheet of drawings, in which Figure 1 is an end
elevation of a set of +and plates forming a cell, and Figure 2 is a front
elevation of one set of plates showing the connection in section. Figure 3 shows
front and side views of the retaining bars, and Figure 4 the insulating stud with
its screwed nuts. Figure 5 shows in plan and elevation the separator employed.
In carrying our invention into effect we form the plates with a series of holes,
suitably stiffened to receive the studs S, and corresponding to the retaining bars B,
which are placed outside the end plates P P¹ as shown by Figures 1 and 2.
we do not confine ourselves to the pattern or conformation of the grid surface
of the plates these are shown plain by Figure 2. Said plates are separated
by washers or collars w shewn detached by the plan and elevation Figure 5. Thus
when the nuts n are screwed up, the double set of plates representing the + and
electrodes of the cell are rigidly connected, and insulated perfectly from each
other, with a proper circulating space for the electrolyte. The lugs L, which
form part of, and are integral with the plates P, are placed in a suitable mould,
and a bridge R of lead or alloy cast thereon, having a central contact piece E
with a tapered hole cast or formed therein. This is shown by Figures 1 and 2,
and in the latter figure the connection of two cells are illustrated; the two
contact pieces E E¹ being connected by a tapered bolt F preferably of the same
material as that of the plates, to prevent deterioration by oxidation or local action,
and also bad electrical contact resulting from unequal expansion. The con-
ductivity is increased by a core of copper or other good conducting metal or
alloy, T. The end of the bolt F being screwed, the conèd or tapered shank may
be drawn into perfect and rigid contact by the nut N. The tapered hole between
and within the two contact pieces E E' may be reamered or otherwise tooled to
coincide with the bolts F so that these may be interchangeable between any
pair of cells of the same type and calibre.
As hereinhefore stated, we do not confine ourselves to any particular con-
formation of plate so that it has the requisite number of holes for the studs S to

page_text: pass through, the essential features of our invention being the method of and
means for holding together, insulating and coupling the two sets of plates forming
a cell, and for coupling two such cells together.
Dated this 7th day of June 1898
FREDK. WALKER,
73, St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.
Improvements in Secondary Electric Batteries or Accumulators.
We, SAMUEL WALTER HART, Gentleman, and EDWARD JAMES CLARK, Engineer,
both of Marshgate Lane, Stratford, in the County of Essex, 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 certain improvements in secondary electric batteries
or accumulators and has for its. objects firstly; the rigid arrangement and in-
sulation of the two sets of plates, ₁+ and -) forming a cell, so that the risk of
deterioration by disintegration is minimised, and the plates may be removed
bodily from the cell when necessary. Secondly, the provision of a coupling for
connecting the cells to form a battery; which maintains perfect contact and
rigidity, and a greater degree of conductivity than obtains in the case of couplings
as heretofore constructed and used.
In order to render the description of our invention more clearly, we have
herein referred to the sheet of drawings accompanying our Provisional Specifica-
tion in which Figure 1 is an end elevation of a set of + and - plates forming a
cell, and Figure 2 is a front elevation of one set of plates showing the connection in
section. Figure 3 shows front and side views of the retaining bars, and Figure 4
the insulating stud with its screwed nuts. Figure 5 shows in plan and elevation
the separator employed.
In carrying our invention into effect we form the plates with a series of holes,
suitably stiffened to receive the studs S, and corresponding to the retaining bars B,
which are placed outside the end plates P P¹ as shown by Figures 1 and 2. As
we do not confine ourselves to the pattern or conformation of the grid surface
of the plates these are shown plain by Figure 2. Said plates are separated
by washers or collars w shewn detached by the plan and elevation, Figure 5. Thus,
when the nuts n are screwed up, the double set of plates representing the + and
electrodes of the cell are rigidly connected, and insulated perfectly from each
other, with a proper circulating space for the electrolyte. The lugs L, which
form part of, and are integral with the plates P, are placed in a suitable mould,
and a bridge R of lead or alloy cast thereon, having a central contact piece E
with a tapered hole cast or formed therein. This is shown by Figures 1 and 2,
and in the latter figure the connection of two cells are illustrated; the two
contact pieces E E¹ being connected by a tapered bolt H preferably of the same
material as that of the plates, to prevent deterioration by oxidation or local action,
and also bad electrical contact resulting from unequal expansion. The con-
ductivity is increased by a core of copper or other good conducting metal or
alloy T. The end of the bolt H being screwed, the conèd or tapered shank may
be drawn into perfect and rigid contact by the nut N. The tapered hole between
and within the two contact pieces E E¹ may be reamered or otherwise tooled to
coincide with the bolts F so that these may be interchangeable between any
pair of cells of the same type and calibre,

page_text: As hereinbefore stated, we do not confine ourselves to any particular con-
formation of plate so that it has the requisite number of holes for the studs S to
pass through, the essential features of our invention being the method of and
means for holding together, insulating and coupling the two sets of plates forming
a cell, and for coupling two such cells together.
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:
First. In secondary batteries or accumulators, the method of and means for
obtaining a rigid insulated adjustment of the pairs of electrodes forming a cell,
and for procuring a perfect electrical contact between such cells in coupling,
when built up; substantially as herein described and shown by the drawings.
Second. In secondary batteries or accumulators the formation of plates or
electrodes with holes for the passage of insulating studs S in combination with
distance pieces in the shape of washers or collars w; upon which the plates or
electrodes are pressed by screwed nuts n on each end of the rods, also bearing
upon external returning bars B, substantially as herein described and shown by
the accompanying drawings.
Third. In secondary batteries or accumulators the method of and means for
connecting the lugs L integrally by casting bridges R upon them, with a contact
piece E substantially as herein described and shown by the drawings.
Fourth. In secondary batteries or accumulators the construction and employ-
ment of tapered bolts F fitting the tapered holes in the contact pieces E so that
these may be drawn together in perfect electrical contact, in combination with
a metallic core of high conductivity passing through and in close contact with
each bolt F substantially as and for the purposes herein set forth and shown by
the accompanying drawings.
FREDK. WALKER,
73, St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.