Improvements in Feed-regulators for Crushing-rolls.
Year: 1890

page_text: Date of Application, 16th Dec., 1890-Accepted, 17th Jan., 1891
COMPLETE SPECIFICATION.
Improvements in Feed-regulators for Crushing-rolls.
I, DANIEL BRENNAN Junior, of Bayonne in the County of Hudson and State of
New Jersey, United States of America, Inventor, 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 :-
In the operation of crushing or reducing ores it is obviously very desirable that
the wear on the rolls should be even at all points and as is well known uneven wear
is liable to result from uneven feeding, uneven grades or sizes of material
fed simultaneously to the rolls, and also from uneven tempering of the metal of the
rolls.
My present invention has specially in view the production of a feed regulator of
simple and stable construction, specially designed for use in connection with ore-
reducing rolls though capable of use with materials other than ores, and by means
of which regulator the ores, either coarse or fine, may be fully under the control of
the operator er attendant, enabling the feed to be varied to supply more or less
material at any point along the rolls, or to entirely cut off the supply at any point,
whereby any tendency of the rolls to wear unevenly may be checked and counter-
acted, and the rolls thus maintaine straight and in perfect order.
The invention consists in the novel form of hopper and slides arranged as herein-
after described, and in the sectional slides made up of relatively movable strips or
individual slides, as hereinafter particularly described and as defined in the claims.
Reference is to be had to the accompanying drawings forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in all
the figures.
Figure 1 is a vertical sectional elevation of a pair of ore-crushing or reducing
rolls and the hopper thereof, having my invention applied thereto, the view being
taken on the line 1-1 in Figures 2 and 3 ;
Figure 2 is a front elevation thereof, the frame being shown in section on the
line 2-2 in Figure 1 ;
Figure 3 is a plan view; and
Figures 4 and 5 are views of the strips or individual slides of which the sectional
slides are formed.
The crushing or reducing rolls A, may be of any preferred or approved form,
suitably supported; A¹ representing a portion of the frame work of the apparatus,
which frame and rolls form no part of the present invention.
The hopper B, from which the material is received by the rolls may also in practice
vary in form, that shown, however, possessing desirable features. It is cast in one
piece, with an open or essentially open top and a closed bottom b, the said bottom
thus forming a substantial support and brace for the regulator slide C, to be herein-
after described.
At the front side ₁, the hopper is formed with an opening or mouth 62, through
which the material escapes to the rolls, cheeks 68, being formed at each side of said
mouth 6 beyond or outside of the side b¹.
On the inside of the hopper on the side thereof, a distance from its upper edge,
there is formed a ledge or flange b', which forms a seat for the superposed regulator
slide C.
Material is received in the hopper B, from a chute or pipe D, or other source of
supply, and in practice the hopper is maintained practically filled.
The slides C and C¹ are oppositely disposed in the hopper, the lower slide C being
entered through an elongated slot 6, in the back thereof, while the superposed
slide C is entered through a similar slot 6, in the front side 6', above the ledge b',

page_text: the said slide C³ terminating at its inner end a suitable distance from the back of
the hopper.
The slides are made up of independent sections or members consisting of individual
strips or slides e, c', represented most clearly in Figures 4 and 5, the strips c¹, of
the upper slide (having, preferably, projections c². In practice the strips or slides
are arranged to present a curved or approximately curved edge for delivering an
increased amount of material at the side portions of the rolls.
With a feed regulator constructed as above described the material, which is fed by
gravity, is regulated to deliver more or less material to any given point or sub-
divisions of the rolls, by projecting or withdrawing the proper strip or member of the
slide C more or less as occasion may demand.
In-practice 1 effect the shifting or movement of the slides by tapping the same with
a hammer or like tool; any other suitable means may be employed for the purpose.
The strips forming the slide are of such a length and the hopper is so proportioned
that when the strips or any of them, are projected forward to the fullest extent the
angle of repose of the material being fed will be reached or exceeded, and the feeding
be stopped at the point or points controlled by the strip or strips so moved. On the
contrary, the material will be fed with increased rapidity as the strips are moved in
the reverse direction, the greatest rapidity of feed being attained when the strips are
withdrawn to the edge of their seat.
Thus the lower slide will be fairly effective by itself, but I prefer to employ the
upper slide also, and find it very desirable not only in spreading the material in the
hopper, as the same is received from the chute or supply pipe, which it does
effectively regardless of the direction of ingress of the material, but it may be made
to affect the feed at any particular point on the rolls..
Thus the two slides constructed as described, furnish a complete feed regulator,
and bring the material completely under control as a propor adjustment may he
-obtained-that-will-distribute the desired quantity at all points_of_the_rolls, and the
strips-forming the slides being small, the smallest section or subdivision of the rolls
can be separately controlled and the supply there:o increased or diminished as
occasion may demand, without affecting the supply fed to the remaining portions.
The strips or slides c, c', may have a square, oblong or like cross section, as desired,
and when made oblong may be-laid flat or-on-edge as desired, or as may be dictated
by the nature of the material being treated.
In practice a clamp encircles the members or sections of each slide, to maintain the
same in the adjusted position.
iving 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. A feed regulator constructed and operating substantially as shown and
described.
2. In a feed regulator, the combination, with a hopper or like receptacle, of two
oppositely-disposed superposed slides baving their inner edges approximating a curve,
substantially as described.
3. In a feed regulator, the combination, with the hopper, of a horizontal slide
arranged-at-the-mouth-thereof, and formed of individual slides arranged side by side.
and an oppositely-disposed horizontally-arranged spreader slide projecting into the
hopper above the said mouth, substantially as described.
4. The combination, with a hopper having its mouth or discharge in one of the side
walls thereof, and having cheeks at the sides of the mouth beyond or outside of said
side wall, of a horizontal slide movable beyond said wall and between said cheeks,
substantially as described.
5.The combination, with a hopper having its mouth or discharge in one of the
side walls thereof, of a horizontal slide movable across or beyond the lower wall.or
edge of the said mouth, substantially as described.
6. The combination, with a hopper having its mouth or discharge in one of the

page_text: side walls thereof, of a horizontal slide movable across or beyond the lower wall or
edge of the said mouth, and consisting of a series of individual slides, movable
longitudinally independently of each other, substantially as described.
7. The combination, with a hopper having its mouth or discharge at the bottom, at
one side, of a horizontal slide arranged at said mouth and movable toward and from
the same, and beyond the bottom of the hopper, and forming in the projected position
an extension of said bottom, substantially as described.
8. The combination, with a hopper having its mouth or discharge at the bottom, at
one side, of a horizontally-arranged slide at said mouth, the said slide consisting of a
series of individual members, arranged side by side, and movable, independently of
each other, beyond the bottom of the hopper, substantially as described.
9. The combination, with a hopper having a bottom for forming a support for the
material and having its mouth or discharge at one side thereof, of a horizontal shelf-
like spreader projecting into the hopper above said mouth, and a horizontal slide,
oppositely disposed with respect to the spreader, the said slide being arranged at the
mouth of the hopper, and movable toward said mouth, to form an extension of the
bottom, substantially as described.
Dated this 16th day of December 1890
D. BRENNAN, Jr.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
D. BRENNAN, Jr.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.