Improvements in Mortar Boxes for Stamp Batteries.
Year: 1888

page_text: Date of Application, 1st Sept.. 1888
Complete Specification Left, 1st June, 1889-Accepted, 13th July, 1889
PROVISIONAL SPECIFICATION.
Improvements in Mortar Boxes for Stamp Batteries.
I, WILLIAM HORNSBY of Spittlegate Iron Works, Grantham, in the County of
Lincoln, Engineer, (a communication to me from abroad by Thomas Johnson Britten
of Johannesberg, Transvaal Republic, Engineer) do hereby declare the nature of this
invention to be as follows:―
The mortar boxes of stamp batteries when gold or other precious ores are being
operated on have sometimes been lined with copper or other metal plates for the
amalgamated precious metal to adhere to. These plates can however only be removed
at the mouth of the mortar box which is a troublesome matter.
According to this invention I construct one side of the mortar box with a pocket
inclined upwards just below the feeding spout and 1 place in this pocket copper or
other plates and in order to get these plates out otherwise than by the mouth of the
mortar box I provide a lid at the top of this pocket which is attached by a hinge,
bolts, or hold by its own weight, or other suitable means and a liquid tight joint made
by it if required.
Dated this 51st day of August 1000.
WILLIAM HORNSBY.
COMPLETE SPECIFICATION.
Improvements in Mortar Boxes for Stamp Batteries.
1, WILLIAM HORNSBY of Spittlegate Iron Works Grantham in the County of
Lincoln Engineer (a communication to me from abroad by Thomas Johnson Britten
of Johannesberg Transvaal Republic 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:
--
The mortar boxes of stamp batteries when gold or other precious ores are being
operated on have sometimes been lined with copper or other metal plates for the
amalgamated precious metal to adhere to. These plates can howover only be removed
at the mouth of the mortar box which is a troublesome matter.
According to this Invention I construct one side of the mortar box with a pocket
inclined upwards just below the foeding spout and I place in this pocket copper or
other plates and in order to get these plates out otherwise than by the mouth of the
mortar box I provide a lid at the top of this pocket which is attached by a hinge,
bolts or held by its own weight, or other suitable means and a liquid tight joint made
by it if required.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section, Figure 2 a front elevation and Figure 3 a plan of a
mortar box constructed according to my Invention.
a is the feeding spout, is a pocket below it, c is a door, the joint being preferably
packed as shown with indiarubber d to make it a tight joint, e e e are amalgamated
plates.
Having now particularly described and ascertained the nature of this Inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1. A mortar box constructed with an opening below the feeding spout through
which the amalgamated plates can be withdrawn.

page_text: 2. Mortar boxes for stamp batteries substantially as described and shown in the
drawings.
Dated this 1st day of June 1880
CARPMAEL & Co.,
Agents.