AN AUTOMATIC AIR GENERATOR AND DISTRIBUTOR FOR FLOUR MILLS."
Year: 1879

page_text: LETTERS PATENT to Thomas Heydon and William Follows, both of Derby, in
the County of Derby, for the Invention of "AN AUTOMATIC AIR GENERATOR
AND DISTRIBUTOR FOR FLOUR MILLS."
PROVISIONAL SPECIFICATION left by the said Thomas Heydon and William
Follows at the Office of the Commissioners of Patents on the 21st March
1879.
THOMAS HEYDON and WILLIAM FOLLOWS, both of Derby, in the County of Derby.
"AN AUTOMATIC AIR GENERATOR AND DISTRIBUTOR FOR FLOUR MILLS."
This Invention has for its object an automatic air generator and distributor for
flour mills.
We purpose generating and distributing the air in flour mills in the following
manner-We form projections or brushes set at any desired angle on the periphery
of the runner stone or other grinding substance, and as this runner stone revolves
the brushes or projections generate a current of air through port holes conveniently
formed through the top of the casement which covers the stones.
These port holes are covered by suitably shaped boxes having adjustable slides
in them to regulate the admission of air to the runner stone.
An ample quantity of air is generated by the projections or brushes on the runner
stone and is distributed by thein around the grinding surfaces of the stone to keep
the wheat or other grain undergoing, the process of grinding perfectly cool, and at
the same time driving off all the stive and vapour produced by the friction of the
grinding surfaces up a trunk on one side of the casement.
On the lower end of this trunk we place a slide that can be adjusted so near to
the back of the runner stone as to conduct the stive and vapour up this trunk.
By this device cold air is generated and distributed around the grinding surfaces,
keeping all stive from collecting on the casement, more especially in the space
between the casement and the runner stone.
The flour on leaving the mill is perfectly dry and in a fit state for the dressing
machine.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
.
the said Thomas Heydon and William Follows in the Great Seal Patent
Office on the 20th September 1879.
THOMAS HEYDON and WILLIAM FOLLOWS, both of Derby, in the County of Derby.
"AN AUTOMATIC AIR GENERATOR AND DISTRIBUTOR FOR FLOUR MILLS."
"
This Invention has for its object the improved arrangement and application of
an automatic air generator and distributor for flour mills.
For this purpose we generate and distribute the air in flour mills in the following
manner, reference being made to the Drawings hereto annexed, and to the figures.
and letters marked thereon.
We form projections or brushes a, a, set at any desired angle on the periphery of
the runner stone b or other grinding substance, and as this runner stone 6 revolves
the brushes or projections a, a, generate a current of air through port holes
conveniently formed through the top of the casement c which covers the stones.
c, c', are port holes covered by suitably shaped boxes c², c², having adjustable
slides 3, 3, in them to regulate the admission of air to the runner stone b.
An ample quantity of air is generated by the projections or brushes a, a, on the
runner stone b, and is distributed by them around the grinding surfaces of the
stone to keep the wheat or other grain undergoing the process of grinding perfectly
cool, and at the same time driving off all the stive and vapour produced by the
friction of the grinding surfaces up a trunk d on one side of the casement c.
On the lower end of this trunk d we place a slide d' that can be adjusted so
near to the back of the runner stone b as to conduct the stive and vapour up this
trunk.
By this device cold air is generated and distributed around the grinding surfaces,
keeping all stive from collecting on the casement c, more especially in the space
between the casement c and the runner stone b.
:
The flour on leaving the mill is perfectly dry and in a fit state for the dressing.
machine.
By the means above described we obtain a simple and more effective ventilation
of mill stones for grinding or any such grinding apparatus, either by working on
plane surfaces or otherwise, of any shape or form, our Invention consisting in the
improved system of introducing cold air between the stones by causing a partial
vacuum in the stone case by the revolving of the runner stone b, and not only of
the drawing of cold air through the stones, but expelling all impure gases and
vapour that is thrown off the materials or substance in the process of being
ground.
We do not confine ourselves to the precise way as herein before described and
shown in Figures 1 to 4 to carry out the object of our Invention, as the port
holes c¹ on the stone casing c may be more or less in number as desired. The form,
shape, and position of the slides c³ may also be varied and adjusted. The ports c¹
are not necessarily made on the top of the casing c, but by a suitable modification
they may be fixed or arranged on the side of casing.
The projections or brushes a on the runner stone, as previously described, are
not necessarily made of iron or wood, or in the form of a brush, as any substance
projecting from the periphery of the stones when in motion is calculated to cause a
current of air to be drawn through the ports c¹.
Neither do we confine ourselves to any exact form or shape of such projections
or wings, or do we confine ourselves to any number of such wings, or any exact
angle or position of such projections or wings, the Drawings annexed shewing
our improved arrangements for carrying our Invention into practice.
In place of employing projections or brushes the periphery of the runner stone
may have grooves cut or formed therein to obtain the same result, in accordance
with our Invention.

page_text: The mill stone case c may be formed as shewn in Figure 5 of the Drawings, the
casing having a projection at the point f near to a spout. The object of this
projection f is that the flour, dust, or ground substance may collect at this point in
certain proportions and thus ensure a better action of the combined apparatus.
The flour, dust, or ground substance meeting with this resistance will more rapidly
clear itself from the case, the more solid portions falling through the spout, the
lighter portions rising to the stive room by the trunk d.
Having thus described the nature of our Invention, and the manner of performing
or carrying the same into practice, we would remark that we do not claim any of
the parts separately, which are well known and in common use, but what we claim
is,-
-
The improved arrangement and application to flour and other grinding mills of
automatic apparatus for generating and distributing a current of air within the
casing c by means of projections or brushes a, a, or their equivalents for cooling the
stones or grinding surfaces and carrying off the stive and vapour, substantially in
the manner herein before described, and represented in the Drawings hereto
annexed.
In witness whereof, I, the said Thomas Heydon, have hereunto set my hand
and seal, this Nineteenth day of September, in the year of our Lord One
thousand eight hundred and seventynine.
THOMAS HEYDON. . (L.S.)