IMPROVEMENTS IN MACHINERY FOR GRINDING AND PULVERISING
Year: 1884

page_text: I ROBERT STONE of 101 Leadenhall Street in the City of London, Engineer do
hereby declare the nature of the said Invention for IMPROVEMENTS IN MACHINERY
FOR GRINDING AND PULVERISING to be as follows:-
Whereas in and by a certain application for Letters Patent and the Specifications
filed therein dated 1st January 1884 N° 153 I have described a certain arrange-
ment and form of mill for grinding and pulverising which is therein shown and
claimed to be applicable to the operations therein particularized And whereas such
mill is or may be applied to many other operations of an analogous nature and the
object of my present application is to obtain Letters Patent for such apparatus
when used in such other operations and for grinding and pulverising any other
materials.
My said Invention consists of an iron pestle and mortar The pestle is globular
in form and usually cast hollow but it is not necessarily an entire globe although it
is usually so made.
In casting the pestle I provide a boss at the top for the reception of a crank pia
or I cast such crank pin in one therewith.
The surface of the pestle is so formed as to be suitable for the work for which it
'is intended, and is, in some cases smooth in other cases corrugations, grooves,
serrations cup surfaces or other forms of roughening the surface are formed
thereon.
The internal form of the mortar is cylindrical above and semi globular below and
of rather larger diameter than that of the pestle to allow a certain quantity of
material to intervene between the pestle and the mortar.
The internal surface of the mortar is.formed to suit the work for which it is
intended as in the case of the pestle above described.
•
The lower end of the mortar is provided with a hole for the exit of the ground
-material.
The mortar is usually cast with feet lugs or other ordinary provisions for keeping
it in position and attaching it to framing or the framing may in some cases be
attached directly to the mortar.
Above the postle and mortar a Crank is so fitted as to travel in a horizontal path
or orbit and the crank pin of the pestle is driven by this crank The crank itself is

page_text: driven by ordinary bevel or other gearing The axis of the pestle is therefore
always out of the perpendicular and travels at an angle which becomes fixed by
the throw of the crank and the motion thereby imparted to the pestle is well
suited to the grinding of all kinds of material requiring such a process.
The pestle and mortar are usually formed of cast iron, but other suitable materials 5
may be used when necessary.
Improvements in Machinery for Grinding and Pulverising.
I ROBERT STONE, of 101 Leadenhall Street, in the City of London, Engineer, dó
hereby declare the nature of my Invention for “IMPROVEMENTS IN MACHINERY FOR
GRINDING AND PULVERISING," and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :—
Whereas in and by a certain application for Letters Patent, and the Specifications
filed therein, dated the 1st January 1884, No 153, I have described a certain arrange-
ment and form of inill for grinding and pulverising, which is therein shewn and
claimed to be applicable to the operations therein particularised. And whereas such
mill is or may be applied to many other operations of an analogous nature; and the
object of my present application is to obtain Letters Patent for such apparatus
when used in such other operations and for grinding and pulverising any other
materials.
•
My said invention consists of an iron pestle and mortar. The pestle is globular
in form, and usually cast hollow; but it is not necessarily an entire globe, although
it is usually so made.
In casting the pestle I provide a boss at the top for the reception of a crank pin,
or I cast such crank pin in one therewith.
The surface of the pestle is so formed as to be suitable for the work for which it
is intended, and is, in some cases, smooth, in other cases, corrugations, grooves,
serrations, cup surfaces, or other forms of roughening the surface are formed
thereon.
The internal form of the mortar is cylindrical above, and semi-globular below,
and of rather larger diameter than that of the pestle, to allow a certain quantity
of material to intervene between the pestle and the mortar.
The internal surface of the mortar is formed to suit the work for which it is
intended, as in the case of the pestle, above described.
Į
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ו.

page_text: The lower end of the mortar is provided with a hole for the exit of the ground
material.
The mortar is usually cast with feet, lugs, or other ordinary provisions for keeping
it in position and attaching it to framing, or the framing inay in some cases be
attached directly to the mortar.
Above the pestle and mortar a crank is so fitted as to travel in a horizontal path
or orbit, and the crank pin of the pestle is driven by this crank. The crank itself is
driven by ordinary bevel or other gearing. The axis of the pestle is therefore
always out of the perpendicular, and travels at an anglo which bocoines fixed by
the throw of the crank, and the motion thereby imparted to the pestle is woll
suited to the grinding of all kinds of material requiring such a process.
The pestle and mortar are usually formed of cast iron, but other suitable materials
may be used when necessary.
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
The manufacture and use of mills for grinding and pulverising all kinds of
materials requiring such operations constructed arranged and operating sub-
stantially as herein and in my said Specification No 153 described.
GEO. DOWNING,
Agent for Applicant.