Improvements in Mortar Mills and other like Grinding or Crushing Mills.
Year: 1898

page_text: Date of Application, 1st Nov., 1898
Complete Specification Left, 21st July, 1899--Accepted, 26th Aug.,
1899
PROVISIONAL SPECIFICATION.
Improvements in Mortar Mills and other like Grinding or Crushing
Mills.
We, JOHN WILLIAMS, the Younger, of Rogerstone House, Rogerstone, near
Newport, in the County of Monmouth, Manager of Steel Works, and JouN ZEALE,
of No. 24, Lewis Street, Newport, aforesaid, Pattern Maker, do hereby declare
the nature of this invention to be as follows:-
The said invention consists of the improvements hereinafter described in
grinding or crushing mills of the kind commonly called mortar mills and
has for its object to reduce friction on the working of the said mills and to
effect a more uniform or efficient crushing or grinding of the material under
operation than is effected by ordinary mortar and like mills.
The grinding or crushing mills to which the said invention relates ordinarily
consist of a circular pan on the flat bottom of which a pair of heavy loose
cylindrical rollers carried on the ends of a horizontal axis crossing the pan as
a diameter are capable of rotating, the rollers revolving in..the pan or the pan
rotating, the axis of the rollers in the latter case being stationary. On the
working of the mill there is a large amount of friction in consequence of the
cylindrical surfaces of the rollers travelling at a uniform velocity and working
upon the bottom of the pan every part of which is rotating at a different
velocity.
In constructing a crushing or grinding mill according to the said invention,
we make the two crushing or grinding rollers and the part of the bottom of
the pan on which they roll, conical, the conical surfaces of the rollers bearing
on the conical surface of the bottom of the pan. The inclination of the several
cones is such that if their conical sides be produced their apecies meet at a
point in the vertical axis of the pan.
Rollers of the kind described are capable of revolving in the bottom of the
pan without or practically without friction, hence there is less power required
to drive the said rollers and a more uniform grinding of the material results
than is possible with grinding mills of the ordinary construction.
IST..... Love of November 1898
Improvements in Mortar Mills and other like Grinding or Crushing
Mills.
We, JOHN WILLIAMS, the Younger, of Rogerstone House, Rogerstone, near
Newport, in the County of Monmouth, Manager of Steel Works, and Joux ZEALE,
4

page_text: of No. 24, Lewis Street, Newport, aforesaid, Pattern Maker, do hereby declare
the nature of the said invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
The said invention consists of the improvements hereinafter described in
grinding or crushing mills of the kind commonly called mortar mills and
has for its object to reduce friction on the working of the said mills and to
effect a more uniform or efficient crushing or grinding of the material under
operation than is effected by ordinary mortar and like mills.
The grinding or crushing mills to which the said invention relates ordinarily
consist of a circular pan on the flat bottom of which a pair of heavy loose
cylindrical rollers carried on the ends of a horizontal axis crossing the pan as
a diameter are capable of rotating, the rollers revolving in the pan or the pan
rotating, the axis of the rollers in the latter case being stationary. On the
working of the mill there is a large amount of friction in consequence of the
cylindrical surfaces of the rollers travelling at a uniform velocity and working
upon the bottom of the pan every part of which is rotating at a different
velocity.
In constructing a crushing or grinding mill according to the said invention,
we make the two crushing or grinding rollers, and the part of the bottom of
the pan on which they roll, conical, the conical surfaces of the rollers bearing
on the conical surface of the bottom of the pan. The inclination of the several
cones is such that if their conical sides be produced their apecies meet at a
point in the vertical axis of the pan.
Figure 1 of the accompanying drawing represents in vertical section and
Figure 2 in plan, a mortar or like mill containing rollers and pan constructed
according to the said invention.
a is the pan and a² the conical bottom of the same and b, bare the loose
conical rollers which rotate on the horizontal shaft or axis c, the said shaft or
axis c being of the kind ordinarily employed in mortar and like mills.
The gearing by which the conical rollers are made to revolve on the conical
bottom of the pan, or where the axis of the conical rollers is stationary, the
gearing by which the pan is rotated being of the ordinary kind and constituting
no part of the said invention we have not thought it necessary to describe and
represent the same.
Rollers of the kind described and represented are capable of revolving in the
bottom of the pan without or practically without friction, hence there is less
power required to drive the said rollers and a more uniform grinding of the
inaterial results than is possible with grinding mills of the ordinary construction.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that
we claim as the said invention:-
-
The improvements in mortar mills and other like grinding or crushing mills.
hereinbefore described and represented in the accompanying drawing the said
improvements consisting in making the crushing or grinding rollers of the
mill conical and the bottom of the pan in which the said rollers work of a
correspondingly conical figure substantially as and for the purpose described
and illustrated.