Improvements in Grinding and Crushing Mills.
Year: 1896

page_text: PROVISIONA
Improvements in Grinding and Crushing Mills.
I, JOHN EDWARD SHARMAN PERKINS of Peterborough in the County of
Northampton Engineer, do hereby declare the nature of this invention to be as
follows:-
When it is desired to distribute the material to be ground evenly across the face
of a wide grinding or crushing roll or pair of rolls, I fix under the opening in the
hopper or shoe, which distributes the grain, a pyramidal or conical distributing
plate, more or less elongated, according to the width of the roll over which it is
desired to spread the grain.
When the distribution is by a vibrating shoe, I actuate the shoe by a suspended
link in which a block turning on a pin attached to the shoe is free to slide.
In the highest position of the block the pin on the shoe, is in line with the axis of
suspension of the link, and no motion is imparted to the shoe, as the block is lowered
in the slot an increasing motion is given to the shoe.
In some cases a solid rod takes the place of the link, a block pivoted to the shoe,
or a hole in a bracket, on the shoe sliding on the rod, and being when raised to its
highest position, in the same line as the axis of suspension of the rod.
When a vibrating shoe is not used to distribute the grain, I employ an agitator
moving in the mouth of the hopper, above a regulating slide to keep the grain
moving and ensure an even feed."
When the crushing is done by a pair of rolls, I make one of the rolls adjustable
in the following manner. To each of the bearings of the adjustable roll, I attach a
rod on which is threaded a spiral spring. Behind the spring is a crossbeam adjustable
by a screw central between the two bearings, by which pressure is applied. Collars
on the rod behind the beam serve to draw back the bearings and separate the rolls.
In some cases I make the rod pass through the sliding blocks carrying the bearings,
and bear upon stops fixed to the frame of the mill. I make the rods adjustable in
the bearing blocks so that they can be set to bear on the stops, and prevent the
rolls coming into actual contact.
In mills in which a pair of crushing rolls are combined, with some other form of
grinding apparatus, such as a pair of grooved plates on the spindle of one of the
rolls, I connect the scraper of that roll, to the bearing blocks of the adjustable roll,
so that as the adjustable roll is withdrawn from contact with the roll, which runs in
fixed bearings, and the spindle of which carries the other grinding arrangement the
scraper is also withdrawn from contact with that roll.

page_text: I, JOHN EDWARD SHARMAN PERKINS of Peterborough in the County of
Northampton, Engineer 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 :-
When it is desired to distribute the material to be ground evenly across the face
of a wide grinding or crushing roll or pair of rolls, I fix under the opening in the
hopper or shoe, which distributes the grain, a pyramidal or conical distributing plate,
more or less elongated according to the width of the roll over which it is desired to
spread the grain.
When the distribution is by a vibrating shoe I actuate the shoe by a suspended
link in which a block turning on a pin attached to the shoe is free to slide. In the
highest position of the block the pin on the shoe is in line with the axis of
suspension of the link, and no motion is imparted to the shoe, as the block is lowered
in the slot an increasing motion is given to the shoe.
In some cases a solid rod takes the place of the link, a block pivoted to the shoe,
or a hole in a bracket on the shoe sliding on the rod, and being when raised to its
highest position, in the same line as the axis of suspension of the rod.
When a vibrating shoe is not used to distribute the grain, I employ an agitator
moving in the mouth of the hopper above a regulating slide, to keep the grain
moving and ensure an even feed.
When the crushing is done by a pair of rolls, I make one of the rolls adjustable in
the following manner. To each of the bearings of the adjustable roll, I attach a rod
on which is threaded a spiral spring; behind the spring is a crossbeam adjustable
by a screw central between the two bearings, by which pressure is applied. Collars
on the rod behind the beam serve to draw back the bearings and separate the rolls.
In some cases I make the rods pass through the sliding blocks carrying the bearings,
and bear upon stops fixed to the frame of the mill. I make the rods adjustable in
the bearing blocks so that they can be set to bear on the stops, and prevent the rolls
coming into actual contact.
In mills in which a pair of crushing rolls are combined with some other form of
grinding apparatus, such as a pair of grooved plates on the spindle of one of the
rolls, to facilitate the use of the grinding plates without the crushing rolls I connect
the scraper of that roll to the bearing blocks of the adjustable roll, so that as the
adjustable roll is withdrawn from contact with the roll which runs in fixed bearings
and the spindle of which carries the other grinding arrangement the scraper is also
withdrawn from contact with that roll.
In the accompanying drawings,
Fig. 1 on Sheet 1 is a front elevation
Fig. 2 on Sheet 2 is an end elevation
Fig. 3 on Sheet 1 is a plan
A and B are the crushing rolls
C is the pyramidal or conical distributing plate.
When a shoe D is used, it is actuated by a block E, working in a slot in the
suspended link F, motion is given to the suspended link F from an eccentric Z. G is
the axis of suspension of the link F. The centre, of the block E, in the position
shown in drawing, coincides with the point of suspension of the link F, and no
motion is given to the shoe.
When a shoe is not used an agitator H moving in the mouth of the hopper I is
employed.
Jis the regulating slide.

page_text: K, K, are the bearings of the adjustable roll A. L, L, are the rods on which are
threaded the spiral springs M. M. N is the crossbeam adjustable by the screw O,
and the capstan handle P. Q, Q, are heads or collars on the rods L. L. R stops on
frame of mill.
The scraper S is connected to the adjustable bearing K by an extension T,
containing the slot U engaging with a projection Y on the spindle W of the
scraper.
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 :-
1. In a mill for crushing or grinding, a pyramidal or conical distributing plate
fixed under the opening of the feeding hopper or vibrating shoe, substantially as
described for the purpose specified.
2. In a mill for crushing or grinding, the methods or arrangements for agitating
the shoe substantially as hereinbefore described for the purpose specified.
3. In a mill for crushing or grinding, an agitator moving in the mouth of hopper
substantially as hereinbefore described for the purpose specified.
4. In a mill for crushing or grinding, the method of making one roller adjustable
substantially as herein before described for the purpose specified.
5. In a crushing and grinding mill, the method of attaching the scraper for the
fixed roller to the bearing block of the adjustable roller, substantially as hereinbefore
described for the purpose specified.
Dated this 20th day of July 1807
JOHN EDWARD SHARMAN PERKINS.