Improvements in the Manufacture of Mill-stones.
Year: 1892

page_text: Date of Application. 7th Sept., 1892
Complete Specification Left, 6th June, 1893-Accepted, 8th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Mill-stones.
1, CHARLES JOHN POTTER, of Heaton Hall, Newcastle-on-Tyne, Cement
Manufacturer, do hereby declare the nature of this invention to be as follows:-
In the Specification of former Patent granted
a
to
me dated the
2nd day of November 1887, No. 14950 1 described various forms of mill-stones
made of lumps of emery set in cement.
According to the present invention I place blocks of concrete made from chips
of burr at intervals in the outer ring of the mill-stone the spaces between them
being filled in with emery and cement as before. This enables furrows to be cut
right through to the outside of the mill-stone.
The blocks are made by filling suitable moulds with small chips of French burr
stone and then grouting in Portland cement. When the cement has set the blocks
are placed in the mould in which the mill-stone is to be formed and the manufacture
is proceeded with as before.
The blocks of burr concrete may either be rectangular or tapered.
1
1002
CHAS. J. POTTER.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Mill-stones.
I, CHARLES JOHN POTTER, of Heaton Hall, Newcastle-on-Tyne, Cement
Manufacturer, 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 :-
former Patent granted to
me dated the
In the Specification of a
2nd day of November 1887, No. 14950 I described various forms of mill stones
made of lumps of emery set in cement.
.
According to the present invention 1 place blocks of concrete made from chips
of burr at intervals in the outer ring of the mill stone the spaces between them
being filled in with emery and cement as before. This enables furrows to be cut
right through to the outside of the mill-stone.
The blocks are made by filling suitable moulds with small chips of French burr
When the cement has set the blocks
stone and then grouting in Portland cement.
are placed in the mould in which the mill-stone is to be formed and the manufacture
is proceeded with as before.
The blocks of burr concrete may either be rectangular or tapered.
DESCRIPTION OF THE DRAWING.
The drawing shows a section of a mill stone constructed according to this
invention.
The portions A A of the mill stone are blocks formed as above described of
burr concrete. The portions B B are formed of lumps of emery set in cement as
described in my former Specification and C C are blocks of burr.
The portions A and C have furrows cut in them leading from the eye to the
circumference of the stone. In some cases the inner ring C of burr may be
omitted.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Mill stones in which the portion furthest from the eye is formed of alternate
blocks of burr concrete and of lumps of emery set in cement substantially as
-described.
2. Mill stones substantially as described and shown in the drawing.
CHAS. J. POTTER.