Improvements in Crushing and Grinding Mills.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Crushing and Grinding Mills.
I, EDMUND ERNEST BENTALL, of Heybridge, near Maldon, in the County of
Essex, Agricultural Engineer, do hereby declare the nature of this invention
to be as follows:-
The present invention has reference to a combined crushing mill and corn grind-
ing mill, and has for its object to provide a compact and convenient construction.
The part of the mill to which my improvement particularly relates, is the
mechanism whereby movement is imparted to the oscillating riddle which receives
the corn from the hopper, and delivers it to the grinding plates. The power for
the operation is derived from the rotating shaft of the crushing roller and grinding
plate, but some difficulty is found in so deriving it without interfering with the
position of the bearings, or making the mill unduly wide.
According to my invention, however, I make the boss of the crushing roller
excentric, or in the form of a cam, against which a projection carried by a
spring-pressed pivotted lever constantly bears. With this arrangement, the crush-
ing roller bearings may be in close proximity to the boss, which is essential, on
account of the strain to which the said roller is subjected, and the grinding plates
can be brought close in, as there is now no need to affix a cam or equivalent power
conveying device to the shaft, between the crushing roller bearing and the supports
of the grinding plates.
The means for conveying the power from the cam-operated pivotted lever before
mentioned to the riddle, may be variously contrived; the following arrangement
is, however, preferred.
The riddle, which is supported, as usual, at the back end by a hinge link, and
at the front by a chain, which gives vertical adjustment, is provided at the side
with an eye, through which passes a pendulum rod hanging from a suitable
bracket. The lower end of this rod is stepped into the head of the pivotted lever
before mentioned, which is mounted to rock in a vertical plane, under the impulse
of the rotating cam boss. A. to-and-fro movement is thus imparted to the
pendulum rod, which thus causes the riddle to oscillate in the manner desired.
A horizontal slide may be furnished for holding and releasing the pendulum
rod.

page_text: COAL DEIN DI MUITICATION.
Improvements in Crushing and Grinding Mills.
I, EDMUND ERNEST BENTALL, of Heybridge, near Maldon, in the County of
Essex, Agricultural 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;—
The present invention has reference to a combined crushing mill and corn-grind-
ing mill, and has for its object to provide a compact and convenient construction.
The part of the mill to which my improvement particularly relates is the
mechanism whereby movement is imparted to the oscillating riddle which receives
the corn from the hopper, and delivers it to the grinding plates. The power for
the operation is derived from the rotating shaft of the crushing roller and grinding
plate, but some difficulty is found in so deriving it without interfering with the
position of the bearings, or making the mill unduly wide.
According to my invention, however, I make the boss of the crushing roller
externally excentric, or in the form of a cam, against which a projection carried by a
spring-pressed pivotted lever constantly bears. With this arrangement, the crush-
ing roller bearings may be in close proximity to the boss, which is essential, on
account of the strain to which the said roller is subjected, and the grinding plates
can be brought close in, as there is now no need to affix a cam or equivalent power
conveying device to the shaft, between the crushing roller bearing and the supports
of the grinding plates.
In the accompanying drawing I have shewn a crushing and grinding mill to
which my improvement has been applied.
Fig. 1 is a side elevation and
Fig. 2 a front view.
A is the feed hopper, divided by a partition into two parts, 1 and 2; 1 delivers
to the crushing rolls B, B, and 2 to the riddle C, which feeds the hopper D of the
grinding plates D1, one only of which, the fixed one, is shewn. E is the driving
shaft of the crushing roll B, and F, F, are bearings for the same, set close up to
the boss b of the said roller, thereby providing the same with efficient support. ¹ is
the cam formed on the boss b of the roller B, from which the motion to be imparted
to the riddle C is obtained. G is the pivotted lever, the projection upon which,
bears against the cam b', as the roller B rotates. is the spring which maintains
the projection in contact with the cam.
The means for conveying the power from the cam-operated pivotted lever G to
the riddle C, may be variously contrived; the following arrangement is, however, 3
preferred.
The riddle C, which is supported as usual at the back end by a hinge link e and
at the front by a chain c', which gives vertical adjustment, is provided at the side
with an eye h, through which passes a pendulum rod j hanging from a suitable
bracket J. The lower end of this rod is stepped into the head of the pivotted 4
lever G before mentioned, which is mounted to rock in a vertical plane, under the
impulse of the rotating cam boss and attendant spring.
A to and fro movement is thus imparted to the pendulum rod, which thus causes
the riddle to oscillate in the manner described.
K is a horizontal slide, operated by a lever k, for holding and releasing the 4
pendulum rod j, to stop or start the oscillation of the riddle, by pulling the pro-
jection g from contact with the cam b¹, or thrusting it into contact therewith.

page_text: 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. Operating the riddle of crushing and grinding mills from a cam or excentric
carried by the boss of the crushing roll, in the manner described with reference to
the accompanying drawing.
2. The herein described means for conveying oscillation to the riddle of crush-
ing and grinding mills, comprising a rocking lever, bearing against a cam upon
the boss of the crushing roller, and a pendent rod connected to the riddle, and
stepped into the head of the said rocking lever, substantially as set forth with
reference to the drawing.
Thatod 41 11th love of Tonnow 1900