A New or Improved Crucible for Casting Lead or like Metals Under Pressure, especially applicable to the Formation of Secondary Electric Battery Grids or Plates.
Year: 1898

page_text: Date of Application, 15th Dec., 1898
Complete Specification Left, 14th Sept., 1899-Accepted, 25th Nov., 1899
PROVISIONAL SPECIFICATION.
A New or Improved Crucible for Casting Lead or like Metals Under
Pressure, especially applicable to the Formation of Secondary
Electric Battery Grids or Plates.
I, EDWARD JAMES CLARK, of 1A, Marshgate Lane, Stratford, in the County
of Essex, Engineer, do hereby declare the nature of this invention to be as
follows:
-
My invention consists in a new or improved crucible for casting lead or like
metals under pressure, and is especially applicable to the formation of secondary
electric battery grids or plates, and has for its object the increased facility of
attaching one or more chills or moulds and filling them with the molten metal,
with a perfect and consolidated structure of the resultant casting free from air
holes or other defects.
In carrying my said invention into practice I construct a crucible of metal
or other suitable substance or material, having one or more angular channels or
gates, to the upper end of which the chills or moulds are held by pressure, so
that the openings or gates thereof may correspond. A central cylinder is fixed
to the crucible with a piston that fits it freely, and may be operated reciprocally
by a hand lever, crank, or like device. The metal to be inelted and cast is
placed in this chamber or receptacle, and the whole, including the angular
channels or gates, is subjected to the heat of the furnace upon which the crucible
is mounted. Certain orifices are pierced through the central cylinder in which
the piston moves, so that when said piston is raised, the molten metal may flow
and rise to its liquid level in the channels or gates leading therefrom, and are
maintained in a molten state by the surrounding heat. The chills or moulds
are then placed in position, and pressed upon the outlets of the angular channels
so that their respective gates or inlets correspond thereto, and the piston is
depressed by the lever or like mechanism, thus imparting a surface pressure to
the molten metal below it, which is by the continued movement of said piston
forced into the chills or moulds in a consolidated or perfectly homogeneous state,
filling all the interstices of the mould or chill, and thus forming a perfect grid
or plate, or similar article.
I may modify the structure in detail to suit various conditions of application
without departing from the essential features of my said invention.
Dated this 23rd day of November 1898.
FREDK. WALKER,
73, St. Stephen's Road, Upton Park, E.,
Agent for the Applicant.

page_text: A New or Improved Crucible for Casting Lead or like Metals Under
Pressure, especially applicable to the Formation of Secondary
Electric Battery Grids or Plates.
I, EDWARD JAMES CLARK, of No. 1a, Marshgate Lane, Stratford, in the County
of Essex, Engineer, 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:
.
My invention consists in a new or improved crucible for casting lead or like
metals under pressure and is especially applicable to the formation of secondary-
electric battery plates or grids, and has for its object the increased facility in
attaching one or more chills or moulds, and filling them with the molten metal,
producing a perfect and consolidated structure in the resultant casting, free from
air holes or like defects.
In order that my invention may be clearly understood, I have appended the
accompanying two sheets of drawings in which Figure 1 Sheet 1 is a sectional
elevation of a crucible with two gates and a simple lever movement. Figure 2
Sheet 2 is an elevation of a crucible with four gates, and rack and pinion gear.
Similar letters of reference indicate corresponding parts throughout the views.
In carrying my invention into effect I construct a crucible A Figures 1 and 2
of metal or other suitable substance or material, having one or more angular
channels or gates a to the upper ends 6 (which are flanged) the chills or moulds
are fixed, so that the openings or gates therein may correspond to those shown
by on the crucible. A central cylinder B is fixed to, or forms an integral
part of the crucible A, and is fitted with a piston C that fits it freely, and may be
operated reciprocally by a hand lever D, pivoted to a standard E and connected to
the piston C by a jointed link or connecting rod F. The crucible A, with the
gates a are built into a furnace so that the whole surface may be subjected to
the necessary degree of heat to keep the lead or like metal in a molten state
until forced into the chills or moulds, shown by G Figure 1. Orifices o are pierced
in the central cylinder B to admit the molten metal under the piston C when it
is raised, and when a flow has thus taken place said orifices o are closed by the
descent of said piston C, and thus the only outlet for the metal is through the
channels or gates a, and thence under pressure into the chills or moulds G
attached thereto. The descent of the piston C, and the consequent compression
of the fluid metal in 3 causes the chills to be filled rapidly, and in every part,
and the resultant casting is in a more consolidated state than would be the case
under the conditions of ordinary casting.
Figure 2 Sheet 2 shows the adaptation of a pinion P, engaging with a rack R
which is attached to the piston C, shown dotted. A handle H is attached to
the spindles carrying P, but I may use any reversible gearing operated by
an electric motor or like power motor.
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
First. In a crucible for casting lead or like metals, the combination therewith
of a cylinder and piston for forcing the fluid metal under pressure into chills or
moulds, substantially as herein described and shown by the appended drawings.
Second. In a crucible for casting lead or like metals the combination therewith
of a cylinder with a piston fitting therein operated by a hand lever substantially

page_text: as and for the purposes as herein described with especial reference to Figure 1
of the appended drawings.
Third. In a crucible for casting lead or like metals, the combination therewith
of a cylinder with a piston fitting therein which is operated by a rotary or
semi-rotary movement substantially as and for the purposes herein described
with especial reference to Figure of the appended drawings.
Fourth. The method of and means for injecting fluid metal into chills or moulds,
substantially as and for the purposes herein described, and illustrated by the
appended drawings.
Dated this 13th day of September 1899.
FREDK. WALKER.
73, St. Stephen's Road, Upton Park. London, E.,
Agent for the Applicant.