Year: 1888

page_text: I, FRANK ATWOOD HUNTINGTON, of No. 45 Fremont Street, in the City and county
of San Francisco, and State of California, one of the United States of America, Manu-
facturer 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 :-
My Invention relates to a device for feeding ores to stamp or other crushing
mills, or for feeding any material where it is necessary to have a regular discharge.
It consists of a hopper or receiver into which the material is placed, an inclined
table beneath said hopper, and a mechanism whereby an oscillating motion is given
to said table; said mechanism being adjusted so that the stroke of the table may be
regulated to any degree; and it also consists in certain details of construction, all of
which will be more fully described by reference to the accompanying drawings, in
which
Figure 1 is a vertical section taken through the hopper, the table, and the
operating cam.
Figure 2 is a front view of the apparatus showing the adjustable cam,
arm or bar.
and adjusting
hopper, which is suitably supported upon a frame-work, and this may
either be stationary or mounted upon wheels so as to be moved from place to
place.
A is a
In the present case, I have shown this hopper with sides tapering or inclining
toward each other, and the back inclining toward the front, which is nearly or quite
vertical, so that the ore is concentrated at the bottom and is delivered upon an
inclined table B. This table extends beneath the bottom of the hopper, having
such an inclination as to discharge to the front.
An adjustable gate O is fixed above the front end of the table so as to control the
discharge in the usual manner.
This table B has its front end supported upon a rocking bar E, and its rear end
upon a similar rocking bar or link F; these two being fulcrumed or pivoted at the
bottom and having their upper ends connected by half-round sockets, or by links or.
other suitable devices with the bottom of the table, so that, as they are oscillated
backward and forward, the table slides beneath the hopper and in line with the
bottom.
The back of the hopper extends down nearly to the table B, and as the table moves
beneath the hopper, the one is forced forward intermittently.
The ore passing out of the hopper falls onto the front end of the table. As the

page_text: table moves forward, it carries this ore along, allowing more of the ore to come out
from the hopper; and as it is drawn backward, the ore is prevented from moving
back with it by the stationary back of the hopper, and this causes the ore, which
is already on the front of the table, to drop off as the table moves back; the next
motion forward carries the ore toward the front and more falls in behind it from
the hopper, and the discharge becomes steady and continuous with each oscillation of
the table.
In order to oscillate the table and to regulate its oscillations, the link F has an oval
slot G, made in its center, and through this a shaft H passes, having a cylindrical
cam 1 fixed to it.
This cam or eccentric is formed by boring or coring a cylinder from the center of
one end to a point near one side at the opposite end, so that as the shaft El is rotated
by any suitable power, if the cylinder is moved so that the end where the shaft is
central is within the slot G, there will be no motion conveyed to the link or rocker-
arm F, but by moving the cylinder along the shaft until that portion which is eccentric
to the shaft is within the oval slot G, the greatest throw will be given to the oscillating
link, and the table will be given the greatest motion.
By sliding the cylinder along the shaft, any degree of throw may be given to the
table between this point and that of no throw.
In order to move this cylinder along the shaft, a collar J surrounds one end of it,
and an arm projects to one side having an arm or rod L, extending out at right angles
from it, and passing through a guide, as shown at M.
The arm L has a suitable handle by which it may be moved so as to cause the
cylinder I to slide upon its shaft H, and notches N upon the bar L, will engage with
a catch so as to hold the cylinder I at any desired point. A screw or cam may be
employed in place of the notched bar, the action being essentially the same.
The shaft H may be simply a rough square shaft, passing through the cylinder I,
which is sufficiently loose to slide back and forth upon it while being caused to rotate
by the rotation of the shaft; or the shaft may be turned and have a feather, upon
which the cylinder slides; but the first-mentioned is the cheapest construction.
By this mechanism, it will be seen that the feed may be regulated to any
degree of nicety by altering the throw of the eccentric and varying the movement of
the table.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim, is
1. An ore-feeder, consisting of a table upon which ore is deposited from a stationary
hopper supported above it, means for oscillating the table, consisting of a cylinder
bored diagonally from end to end, and mounted upon a rotating shaft, said cylinder
being connected with the table, and made adjustable upon its shaft so as to increase or
diminish its eccentricity and the movement of the table, as herein described.
2. An ore-feeder, consisting of a table supported upon links so that it may recipro-
cate, a hopper fixed above the table and delivering ore upon it, a rotary shaft
extending through an oval slot in one of the table-supporting links, and a cylinder
bored diagonally from end to end, and fitted to slide end wise upon the shaft while
rotating within the oval slot to increase or decrease the movement of the table,
and mechanism by which the end movement of the cylinder is produced, as herein
described.
D
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