Improvements in Feed for Grinding Mills, Purifiers, and other Machines.
Year: 1886

page_text: Date of Application, 7th July, 1886.
Complete Left, 6th Apr., 1887.
Complete Accepted, 10th May, 1887.
RESERV
PROVISIONAL SPECIFICATION.
Improvements in Feed for Grinding Mills, Purifiers, and other
Machines.
SAMUEL BRASSINGTON BAMFORD of the firm of Henry Bamford & Sons Agricultural
Engineers Uttoxeter in the County of Stafford, do hereby declare the nature of the
invention for IMPROVEMENTS IN FEED FOR GRINDING MILLS, PURIFIERS AND OTHER
MACHINES to be as follows:-
This invention has for its object improvements in the feed for Grinding Mills,
Purifiers and other similar machines.
In grinding mills it has been usual for the purpose of controlling the feed, to
produce a vibrating or shaking motion in the trough that carries the corn or other
material from the hopper to the mill and also to rise and fall the outer end of trough.
The vibrating motion is often produced by a damsel or vertical shaft having one or
more ribs revolving against the outer end of the trough, and thus communicating to
it a vibrating motion.
For a machine with a horizontal shaft this is not a convenient method as it entails
the use of bevil gearing.
My improvement consists in fixing an eccentric on the horizontal shaft of the mill
which shaft should be underneath and in a line with the hopper.
Against the eccentric I place a right-angled lever the extremity of one arm of
which is forced by a spring horizontally against the eccentric and the other or vertical
arm extends downwards and is pivotted to a fixed centre. The right angled lever is
thus free to oscillate about the fixed centre by the motion of the eccentric.
On the top of the vertical arm and in a perpendicular line with it I joint a round
rod which is pivotted to a fixed centre at its upper extremity.
When the right angled lever is put in motion by the eccentric the vertical rod being
connected to it as aforesaid and the rod being pivotted at its upper extremity to a
ixed centre. It is thus caused to move like the motion of a pendulum. To this rod

page_text: or pendulum is connected the feeding trough by a loop which is free to slide up and
down between its upper and lower joints.
The eccentric will thus oscillate the right-angled lever with the pendulum and
feeding trough connected therewith.
The outer end of the feeding trough can be raised and lowered by a chain and
hand lever. As the loop on the hopper is raised nearer the top of the pendulum the
less motion will be communicated to it and as it falls to the lower end of the pendulum
the greater will be the vibration imparted to it.
I use a chain with hand lever as aforesaid which can be set at any required position
by springing into notches in a quadrant plate.

page_text: SAMUEL BRASSINGTON BAMFORD of the firm of Henry Bamford & Sons Agricultural
Engineers Uttoxeter in the County of Stafford, do 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 :-
This invention has for its object improvements in the feed for Grinding Mills,
Purifiers and other similar machines.
In grinding mills it has been usual for the purpose of controlling the feed to
produce a vibrating or shaking motion in the trough that carries the corn or other
material from the hopper to the mill, and also to rise and fall the outer end of
the trough.
The vibrating motion is often produced by a damsel or vertical shaft having one or
more ribs revolving against the outer end of the trough, and thus communicating to
it a vibrating motion.
For a machine with a horizontal shaft this is not a convenient method as it entails
the use of bevil gearing.
My improvement consists in fixing an eccentric on the horizontal shaft of the mill
which shaft should be underneath and in a line with the hopper.
Against the eccentric I place a right-angled lever the extremity of one arm of
which is forced by a spring horizontally against the eccentric and the other or vertical
arm extends downwards and is pivotted to a fixed centre. The right angled lever is
thus free to oscillate about the fixed centre by the motion of the eccentric.
On the top of the vertical arm and in a perpendicular line with it, I joint a round
rod which is pivotted to a fixed centre at its upper extremity.
When the right angled lever is put in motion by the eccentric the vertical rod
being connected to it as aforesaid and the rod being pivotted at its upper extremity to
a fixed centre. It is thus caused to move like the motion of a pendulum. To this
rod or pendulum is connected the feeding trough by a loop which is free to slide up
and down between its upper and lower joints.
The eccentric will thus oscillate the right angled lever with the pendulum and
feeding trough connected therewith.
The outer end of the feeding trough can be raised and lowered by a chain and hand
lever, as the loop on the hopper is raised nearer the top of the pendulum the less
motion will be communicated to it, and as it falls to the lower end of the pendulum
the greater will be the vibration imparted to it.
I use a chain with hand lever as aforesaid which can be set at any required position
by springing into notches in a quadrant plate.
The accompanying drawing represents a transverse section of a Grinding Mill to
which my invention is applied.

page_text: A is the main shaft. B is the small hopper for receiving and conducting the
material to be ground from the vibrating feeding trough C to the grinding surfaces
shewn partly at D. E is the large hopper for containing a supply of material to be
ground. F is an eccentric keyed on the main shaft A. G is a right angled lever
having the extremity of one of its arms H pressing against the eccentric F by the
spring J.
The other or vertical arm of the right angled lever G extends downwards and is
pivotted to a fixed centre R.
On the top of the vertical arm and in a perpendicular line with it I joint at L with
a ball and socket joint a round rod M which is pivotted to a fixed centre N at its upper
extremity.
To the rod or pendulum M is connected the feeding trough C by a loop O which is
free to slide up or down the said rod M.
P is a chain connecting the lower end of the vibrating trough C with a hand lever
and quadrant Q.
The vibrating motion of the feeding trough C is caused by the eccentric F.
On the main shaft A giving motion to the right angled lever G and with it the
rod M to which is connected the said feeding trough C.
As the feeding trough C is raised or lowered by the hand lever Q and chain P the
vibrating motion is increased or diminished in proportion as the loop O is higher or
lower on the rod M for if it is at the highest part of the rod M very little motion will
be communicated to it and the vibration will be increased as the feeding trough C is
lowered down until the loop O reaches the ball and socket joint L.
The feeding trough C may be made to vibrate in an opposite direction by
substituting an eccentric on the main shaft A in the form of a waved disc.
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 arrangement before described and represented by the drawings annexed of the
feeding apparatus for grinding mills, Purifiers and other similar machines.
Dated this 5th day of April 1887.