AN IMPROVEMENT IN DISINTEGRATING, PULVERIZING, AND GRINDING MACHINERY
Year: 1883

page_text: LETTERS PATENT to Thomas Gilbert Bowick, of Bedford in the County of
Bedford, Manufacturing Chemist for an Invention of AN IMPROVEMENT IN
DISINTEGRATING, PULVERIZING, AND GRINDING MACHINERY
PROVISIONAL SPECIFICATION left by the said Thomas Gilbert Bowick at
the, Office of the Commissioners of Patents on the 13th August 1883.
THOMAS GILBERT BOWICK, of Bedford in the County of Bedford, Manufacturing
Chemist AN IMPROVEMENT IN DISINTEGRATING, PULVERIZING & GRINDING
MACHINERY
This Invention primarily consists in substituting a Current of Air for the Screens
used for regulating the fineness of the material in process of grinding
According to one arrangement I block up the space in which the screens fit with
Sheet Iron, Wood, or other suitable material. I then attach a pipe from a fan or
other apparatus for generating a Current of Air, to the machine, and another pipe
from the machine to a Settling Chamber.
The fan is then operated, and a Current of Air passes through the machine
carrying with it the ground material through the exit pipe into the Settling
Chamber. The fineness of the ground material is regulated by the strength of the
Current of Air, which may be increased or decreased as desired.
According to another arrangement the Fan or other air generating apparatus
may be placed in the Settling Chamber, or between the Settling Chamber and the
Machine, and the ground material drawn through it.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Gilbert Bowick in the Patent Office on the 13th February
1884.
THOMAS GILBERT BOWICK of Bedford in the County of Bedford Manufacturing
Chemist "AN IMPROVEMENT IN DISINTEGRATING, PULVERIZING, AND GRINDING
MACHINERY
"
This Invention relates to an improvement which I have effected in machinery for
disintegrating, pulverizing and grinding various substances.
According to my invention I adapt an air blast in a particular manner to that
class of disintegrators or pulverizers such as Lucops, Harrison-Carter's or Carr's, for
the purpose of regulating the fineness of the material produced by the disintegrating
and pulverizing process. The machine to which I prefer to adapt my improvement
is that known as "Lucop and Cook's
"
In carrying my invention into effect, I dispense with the screens used in the
above named machines for the purpose of regulating the fineness of the material,
and I block up the space which the said screens usually occupy in these machines,
with plates of sheet iron, wood, or other suitable material.
I then adapt to the machine preferably midway between the axle of the rotating
balls or beaters and the periphery of the casing in which they revolve a pipe or
air duct leading from a fan or blower of any suitable construction and I arrange
the outlet for the air preferably at or near the point where the material to be
pulverized is admitted to the machine.
When the disintegrator or pulverizer is at work and the fan is operated, a current
of air will be caused to enter the machine as above stated at a point about midway
between the axle of the machine and the periphery of the casing, and preferably
on that side of the axle which is remote from the air outlet, carrying off with it
the finest ground material through the exit pipe into a settling chamber, or other
convenient receptacle.
And in order that my improvements may be fully understood, I have shown
them as applied to a "Lucop and Cook" Pulverizer in the accompanying Drawing
in which Fig 1 is an elevation showing the Pulverizer with its feed attachment,
the air inlet and outlets, and the settling chamber; and Fig: 2 is an elevation
showing the Pulverizer and Fan in section.
In theso Figures, A is the Pulverizer of the class above named, B the feed hopper
attachment, the settling chamber, and D the pipe leading from the fan or
blower. b. is the shute by which the material to be treated enters the pulverizer,
its quantity being regulated by a slide or valve or in any convenient and known
manner, and D¹ is the air outlet leading from the machine A to the settling
chamber C, whence the finely ground stuff falls down a shute c. into a suitable
receptacle c¹.
Referring now to Fig: 2. E represents a fan or blower of any convenient kind, 4
from which a pipe D leads to the machine A, and is connected to the said machine
at the point a in one side of the casing, between the axle a¹ and the inner
periphery a. of the machine. The air entering the machine at the point a. blows
across the grain or other material entering the machine, and carries off the particles
of finely ground stuff by the air outlet DI to the chamber C.
It will be understood that the screens usual in this class of machine are
dispensed with and that no outlet for the ground material is allowed other than
the outlet D¹.
To secure the best results the air inlet a. should be in such a position relative to
the axle a', the feed inlet b., and the air outlet D', that a maximum quantity of the
finely pulverized particles will be carried off by the air blast.

page_text: The position of the parts shewn in Fig: 2 is one from which good results are
obtainable.
The fineness of the ground material can be regulated by increasing or diminishing
the strength of the current of air passing through the machine and without
diminishing the speed of the pulverizing blades or balls.-This may be effected
by a throttle valve or a slide, or by varying the speed of the fan or blowor which
may be run at any suitable speed independently of the speed of the pulverizing
blades or balls.
Having now described tho nature of my Invention of "An Improvement in
disintegrating, pulverising and grinding machinery" and explained in what
manner the same may be carried into effect. I wish it to be understood that I
claim
16
The adaptation to disintegrating machines of the class above indicated, and more
especially to the pulverizing machine known as Lucop & Cooks" of an air blast
which can be varied in strength independently of the speed of the rotating blades
or balls in the pulverizer, for the purpose of regulating the fineness of the pulverized
material, in lieu of the screens ordinarily used for such purpose, as described and
shown in the Drawing.
In witness whereof I the said Thomas Gilbert Bowick havo hereunto set my
hand and seal the ninth day of February in the year of our Lord One thousand
eight hundred and eighty four.
E ALL DEDT PORAZ