Apparatus for Manufacturing Corrugated Lead Boxes for Electric Accumulators.
Year: 1891

page_text: Date of Application, 17th Jan., 1891
Complete Specification Left, 13th Nov., 1891-Accepted, 19th Dec., 1891
PROVISIONAL SPECIFICATION,
[Communicated from abroad by THOMAS KNIGHT STEANES, of No. 56, Margaret
Street, Sydney, in the Colony of New South Wales, Electrical Engineer.]
Apparatus for Manufacturing Corrugated Lead Boxes for Electric
Accumulators.
We, WOODHOUSE AND RAWSON UNITED LIMITED, of No. 88 Queen Victoria
Street, in the City of London, Manufacturers, do hereby declare the nature of this
invention to be as follows:-
This invention relates to apparatus whereby lead boxes corrugated along the
sides can be manufactured ready for use in electric accumulator batteries as holders
of exciting liquid, and of corrugated plates suspended in them. Such boxes
suitably converted in any known manner, more especially by the process described
in Epstein's Specification No. 350 of 1890, serve as electrodes, either positive or
negative as may be desired.
For this purpose, a hydraulic or other press is employed to push up a plunger
within a die which is charged with a suitable quantity of lead, both the plunger
and the die being corrugated. At the same time that the plunger is forced upwards,
another plunger is forced a little way downwards into the die, this plunger being
somewhat smaller than the die by the quantity due to the thickness of the box that
is to be manufactured. By the ascent of the bottom plunger the lead is forced
out of the upper mouth of the die around the upper plunger until the box is formed
to the depth provided for by the charge of lead in the die. The upper plunger
with the moulded box on it is then raised out of the die and turned aside upon a
hinge at the top, so that the moulded box can be withdrawn from off it. In order
to reduce the frictional resistance during the moulding, and to facilitate the
removal of the box, the upper plunger is made smaller throughout than a small
part of its length next the lower end.
Dated this 17th day of January 1891.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Apparatus for Manufacturing Corrugated Lead Boxes for Electric
Accumulators.
We, WOODHOUSE AND RAWSON UNITED LIMITED, of No. 88 Queen Victoria
Street, in the City of London, Manufacturers, 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 :-
This invention relates to apparatus whereby lead boxes corrugated along the
sides can be manufactured ready for use in electric accumulator batteries as holders
Such boxes
of exciting liquids, and of corrugated plates suspended in them.
suitably converted in any known manner, more especially by the process described
in Epstein's Specification No. 350 of 1890, serve as electrodes, either positive or
negative, as may be required. For this purpose, a hydraulic or other press is
employed to push up a plunger within a die which is charged with a suitable
quantity of lead. Another upper plunger somewhat smaller than the die, by the
amount due to the thickness of the box to be manufactured, being introduced into
the mouth of the die, the lead is forced out at the upper mouth of the die around
the upper plunger, until the box is formed to the depth provided for by the charge
Pine All

page_text: of lead in the die. The die and plungers being corrugated, the sides of the box
produced are correspondingly corrugated.
Fig. 1 of the accompanying drawings is a front view, Fig. 2 is an end view partly
in section, and Fig. 3 is a sectional plan on X X of Fig. 1 shewing apparatus
according to this invention. H is the hydraulic press, the plunger of which raises
the follower F carrying the lower moulding plunger P, which rises within the
die D.
A little above the mouth of the die D is the lower end of the upper plunger U
which has a projecting lip corrugated to correspond with corrugations in the sides
of the die but smaller than the interior of the die by the thickness of the walls
of the box to be produced. The upper plunger U is hinged by trunnions at J J
at the upper ends of two rectangular struts S, which are shouldered a little
above the die and terminate in bolts B with nuts under the die. Four bolts K
surrounded by helical springs connect the die to the follower F. The apparatus
works in the following manner. The upper plunger U being turned aside on its
trunnions J leaving the mouth of the die D exposed, this is charged with lead, and the
plunger U is moved back, so that its lower end is centrally above the mouth of
the die. The hydraulic plunger, being then caused to ascend, raises the follower F
and the lower plunger P.
During the first part of the ascent of the follower F it raises the die D until it
butts against the shoulders of the struts S, the lower end of the upper plunger U
being thus brought just within the mouth of the die. As the plunger P ascends,
it forces the lead out at the mouth of the die between the walls of the die and the
upper plunger U until the plunger P has attained such a height that between its
upper end and the lower end of the upper plunger U there is the desired thick-
ness of metal to form the bottom of the box. During the ascent of the follower F
the springs on the bolts K are compressed. When the follower F has quite
descended, the die D descends from the shoulders of the struts S till it rests on
their nuts below, leaving the upper plunger U with the moulded box upon it just
clear of the upper face of the die; the upper plunger U can then be turned aside
on its trunnions J J and the moulded box can be drawn off it.
By making the upper plunger U with a projecting lip at its lower end there is
no friction of the sides of the box on the body of the plunger above, during the
moulding of the box or its removal.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. Apparatus for manufacturing corrugated lead boxes for electric accumulators
consisting of a hydraulic or other suitable press arranged to force a lower plunger
up within a die charged with lead, and of an upper stationary plunger entering the
upper mouth of the die, substantially as described.
2. In apparatus such as is above referred to making the upper plunger with a
lip projecting at its lower end and with trunnions at its upper end, substantially as
and for the purposes herein set forth.
Dated this 12th day of November 1891.
ABEL & IMRAY,
Agents for the Applicants.