IMPROVEMENTS IN BLOWERS AND BRUSHES FOR MILLS FOR GRINDING GRAIN AND OTHER SUBSTANCES, A PART OF WHICH IMPROVEMENTS MAY ALSO BE APPLIED TO THE MANUFACTURE OF BRUSHES FOR VARious Purposes
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Henry Smith at the Office of
the Commissioners of Patents, with his Petition, on the 28th
September 1872.
I, HENRY SMITH, of Birmingham, in the County of Warwick, Miller,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
BLOWERS AND BRUSHES FOR MILLS FOR GRINDING GRAIN AND OTHER SUBSTANCES,
A PART OF WHICH IMPROVEMENTS MAY ALSO BE APPLIED TO THE MANUFACTURE OF
BRUSHES FOR VARious Purposes,” to be as follows:—
In mills for grinding grain and other substances, blowers or vanes are
fixed on the upper or running mill stone for the purpose of producing a
current of air to cool and dry the ground meal. The said upper or
running stone is also provided with brushes or scrapers for the purpose
of sweeping or removing the meal at any required depth below the faces
of the mill stones.
My Invention consists principally in the method herein-after described
of constructing and arranging the parts of the said blowers and brushes,
whereby the said blowers and brushes can be set or adjusted and fixed

page_text: in the required positions with great nicety, and with great readiness, the
said blowers and brushes being combined together in one instrument or
apparatus so that when once properly adjusted they may be removed
from the mill stone and replaced thereon without the principal adjust-
ments being interfered with.
I construct and arrange the parts of the said blowers and brushes in
the following manner:―The blower is carried by the upper end, and the
brush by the lower end of a vertical bar or carrier. This bar or carrier
is furnished at its top with a plate situated at right angles to the said
bar, and through a slot in which a screw passes and secures the bar or
carrier to the upper surface of the running mill stone, the said screw
taking into a screw box fixed in the back or upper face of the said
running stone. On one edge of the horizontal fixing plate is a vertical
flange carrying the blower. The said blower has a slot through which
a screw pin passes and takes into the said vertical flange. The lower
part of the vertical bar or carrier is diminished in thickness on its inner
side to about one half the thickness of the upper part. On the inner
face of the said lower part of the bar or carrier is another bar carrying
the brush, the said brush bar having such a thickness that it is flush
with the face of the unreduced part of the bar or carrier first described.
This brush bar is connected to the lower end of the bar or carrier by
means of a screw pin passing through a long slot in the bar or carrier
and taking into the said brush bar. The lower end of the brush bar
carries a brush constructed by preference in the manner hercin-after
described.
The action of the several parts is as follows:-By means of the slot in
the fixing plate the vertical bar or carrier may be adjusted with great
nicety at the required distance from the edge of the running stone, and
may also be turned so as to make the required angle with a radius of
the stone at the point where it is fixed. By means of the slot in the
blower and its adjusting and fixing screw in the flange, the said blower
may be raised to any required angle and may be fixed nearer to or
further from the centre of thic stone.
By means of the long slot in the lower part of the vertical bar or
carrier the height of the brush may be determined with the greatest
nicety. When the several adjustments have once been made for any
particular stone or pair of stones, the combined blower and brush may

page_text: be removed by taking out the screw passing through the horizontal
fixing plate without the relative positions of the blower and brush being
disturbed, and the combined instrument or apparatus on being restored
to its place on the stono requires no adjustment except its radial
adjustment..
The brush which I employ is made by preference in the following
manner :-I take two plates of metal, one of which may be forged or
otherwise made at the bottom of the brush bar herein-before described.
"One of the said plates is narrower than the other, and fits in the turned
up sides of the other or broader plate. By means of a screw passed
through the smaller plate and taking into the larger one, the said
smaller plate may be fixed to the larger one. The bristles or other
material of which the brush is made are enclosed or gripped between the
lower edges of the two plates. In order to make the said edges more
effectually grip the bristles the lower edge of each plate has on its inner
side a rib or projection.
-
The last described part of my Invention may be applied to the
manufacture of brushes for various purposes, such for example as
brooms, scrubbing and dust brushes, and circular or revolving brushes,
the bristles or brushing materials being secured to the body.of the brush
by being gripped between the edges of plates constituting the body of
the brush, the said plates being bound or held together by screws
substantially as herein-before described..