Improvements in the Manufacture of Finely Pulverised Substances, for Use in the Production of Portland Cement, Pigments, and the like.
Year: 1896

page_text: Date of Application 5th Nov 1896
Complete Specification Left, 5th Aug., 1897-Accepted, 25th Sept., 1897
Complete Specification Left, 5th Aug., 1897-Accepted, 25th Sept., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Finely Pulverised Substances,
for Use in the Production of Portland Cement, Pigments, and
the like.
I ROBERT HUNTER of 14 Cannesburn Road Maryhill Glasgow, in the County
of Lanark North Britain, Manager, do hereby declare the nature of this invention
to be as follows:-
In carrying out my Invention, The Ingredients pass through a Stone Breaker;
Pan Mill; thence through Mill Stones, after which they are conveyed and intro-
duced into a Revolving Screen, The fine material passing through said Revolv-
ing Screen is deposited in a large Chamber. The rough material returning to
the Mill Stones to be ground over again.
My invention has for its object, an improvement in the manner of preparing
the ingredients, and of Manufacturing Portland Cement, Pigments, and other dry
powders.
In carrying out my Invention. The Ingredients are passed through a Stone
Breaker; from the Stone Breaker, the material is elevated or conveyed to the
Pan Mill; from the Pan Mill the roughly Ground material is elevated or conveyed
to the Mill Stones, by which they are ground to the desired fineness. All this is
done in the usual and well known manner.
The finely ground materials are then elevated or conveyed to a small hopper,
at the bottom of which is an Airtight delivery Valve, or Rotating Feeder, which
introduces the material, into a Revolving Screen of suitable shape preferably
exagon covered with fine Gauze Wire.
The said Revolving Screen is arranged with Blades or Fans which prevent the
finely ground material from being aggregated or deposited in one mass or heap,
and the revolution of the Screen forces the fine particles through the Gauze Wire,
into a large outer chamber, where they are deposited in a finely mixed condition.
The Grit, or insufficiently ground particles are passed from the inside of said
Revolving Screen through a shoot,, fitted with Rotating delivery Valve, and thence
back to the Mill Stones to be ground over again.
Dated at Glasgow this 3rd November 1896.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Finely Pulverised Substances,
for Use in the Production of Portland Cement, Pigments, and
the like.
I ROBERT HUNTER, formerly of 14 Cannesburn Road Maryhill, but now of 15
Morrison Street Glasgow, in the County of Lanark North Britain, Manager do

page_text: 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:-
My Invention has, for its object an improvement in the manner of preparing
the Ingredients, and of Manufacturing Portland Cement, Pigments, and other
Dry Powders.
In carrying out my Invention, The Ingredients are passed through a Stone
Breaker A, from the Stone Breaker A the Material is by Elevator B conveyed to
the Pan Mill C, the Roughly Ground Material is then by Elevator D, conveyed to
the Mill Stones E, by which they are ground to the desired fineness.
All this is done in the usual and well known manner."
The finely Ground Materials are then by Elevator F, conveyed to a small
Hopper G, at the bottom of which, is an Air Tight Delivery Valve or Rotating
Feeder H, which introduces the Material into a Revolving Screen I, of suitable
Shape, preferably Hexagon covered with fine Gauze Wire.
The said Revolving Screen I, is arranged with Blades or Faus J, which prevent
the finely ground Material from being aggregated or deposited in one Mass or
Heap, and the revolution of Screen, forces. the particles through the Gauze Wire,
into a large Chamber K, where they are deposited in a finely mixed condition.
The Grit or insufficiently ground Particles, are passed from the inside of said
Kevolving Screen I, through a shoot L, fitted with Rotating Delivery Valve M,
and thence back to the Mill Stones E, to be ground over again.
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) In the manufacture of finely Pulverised Substances, for use in the Production
of l'ortland. Cement l'igments and other Dry Powders. The combination and
arrangement of Parts constituting my improved apparatus substantially as herein-
before described and shown in the accompanying drawings. "
(2) In the manufacture of finely Pulverised Substances for use in the Production
of Portland Cement, Pigments and other Dry Powders, the introducing of the
Materials, into a Revolving Screen covered with Fine Gauze Wire, and arranged
with Blades or Fans as hereinbefore described.
Dated this Third day of August 1897