Year: 1885

page_text: I ROBERT STONE of 101 Leadenhall Street, in the City of London, Engineer,
do hereby declare the nature of this invention to be as follows:-
The object of my invention is to effect improvements in a certain invention
for which I have obtained Letters Patent dated 1st January 1884 N° 153, and
12th November 1884 N° 14,928.
'
Whereas in the Specifications of my said patents I have described a certain
machine for grinding the slurry, consisting of an arrangement somewhat like a
pestle and mortar.
And whereas I have since found it to be advantageous to relieve the mortar
of some portion or (in some cases) of the whole of the weight of the pestle, in
order that the matter to be ground may be relieved of pressure, or that such
pressure may be otherwise regulated and adjusted to suit the character and degree
of hardness of the material to be ground.
This object of sustaining the weight of the pestle, otherwise than by the material
under operation, may be effected in various ways, such as by screws, pins, bolts, or
short rods passing through the bottom of the mortar and impinging against the
underside of the pestle and thereby keeping the same in the desired position.
Another means consists in sustaining the weight of the pestle by one or more link
or links attached to the pin above the pestle, such links vibrating or revolving
with such pin; the upper end of the link or links being attached to and sustained
by a lever, springs, hydraulic, pneumatic, steam or other power, so regulated that
the whole or any part of the weight of the pestle is sustained. In other cases the
link may be fixed as to position at the upper end, and, by regulating, the angle of
obliquity of the pin the necessary lifting power may be obtained, and regulated.
It is obvious that the arrangements for sustaining the necessary weight may be
varied, the object being the same in whatever way it may be effected.
By the arrangements above described the freeness and speed of delivery of the
material can be regulated and controlled as required.
GEO. DOWNING,
Agent for Applicant.

page_text: COMI LEIM DIECIFICATION,
Improvements in Machinery for Grinding and Pulverising.
I, ROBERT STONE, of 101 Leadenhall Street, in the City of London, Engineer,
do hereby declare the nature of my 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 object of my invention is to effect improvements in a certain invention, for
which I have obtained Letters Patent dated 1st January 1884, No 153, and
12th November 1884, N° 14,928.
Whereas in the Specifications of my said Patents I have described a certain
machine for grinding the slurry, consisting of an arrangement somewhat like a
pestle and mortar.
And whereas I have since found it to be in some cases advantageous to relieve
the mortar or the material in the mortar of some portion, or of the whole of the
weight of the pestle, in order that the material to be ground may be relieved of
pressure, or that such pressure may be otherwise regulated and adjusted to suit the
character and degree of hardness of the material to be ground.
This object of sustaining the weight of the pestle, otherwise than by the material
under operation, may be effected in various ways, such as by screws, pins, bolts, or
short rods, passing through the bottom of the mortar, and impinging against the
underside of the pestle, and thereby sustaining the same in the desired position.
Another means consists in sustaining the weight of the pestle by one or more link
or links, attached to the pin above the pestle, such links vibrating or revolving
with such pin, the upper end of the link or links being attached to and sustained
by a lever, springs, hydraulic, pneumatic, steam or other power, so regulated that
the whole or any part of the weight of the pestle is sustained. In other cases
the link may be fixed as to position at the upper end, and by regulating the
angle of obliquity of the pin the necessary lifting power may be obtained and
regulated.
Another method of sustaining the ball or pestle, consists in fitting a plate there-
under, with suitable openings to allow the ground material to pass through. This
plate is sustained by a lever, the outer end of which is operated by a hand-wheel
and screw.
It is obvious that the arrangements for sustaining the necessary weight may be
varied, the object being the same in whatever way it may be effected.
By the arrangements above described the freeness and speed of delivery of the
material can be controlled as required; and the pressure applied, regulated and
relieved with promptitude,

page_text: 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
In grinding and pulverising machinery of the description herein before referred
to, the method of raising, lifting, sustaining and supporting the pestle or ball,
substantially as herein before described.