Bolting Apparatus.
Year: 1893

page_text: Date of Application, 4th Apr., 1893-Accepted, 27th May, 1893
CODIFIEDT DUIFICATION.
Bolting Apparatus.
We, COLIN FRANCIS HARDY, Millwright, and LESTER MASON GODLEY,
Merchant Miller, both residents of Scottsville, in the County of Monroe and
State of New York, United States of America, 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 improvement relates to that class of bolting apparatus known as scalpers,"
and used for sifting and separating the crushed stock as it comes from the rollers.
It also relates to that class known as sieve machines, in which the stock passes
over inclined screens which are vibrated for the purpose of producing the
separation. The invention consists of a suspension frame, to which is hung a
shaker holding the screen or screens, and a peculiar arrangement of eccentrics or
cams whereby a bodily vibration is given to the screens both horizontally and
vertically. It further consists in a peculiar means for feeding the material down
on the screens, all as hereinafter more fully described and embraced in the claims.
In the drawings-
Fig. 1 is a side elevation of the machine;
Fig. 2 is an end elevation looking in the direction of the arrow at the left in
Fig. 1
j
Fig. 3 is a plan view;
Fig. 4 is a diagram showing the top of the main frame in cross section, and a
side elevation of the upper portion of the shaker and the operating devices
connected therewith ;
Fig. 5 is an enlarged cross section of the hopper in line, x, of Fig. 2;
Fig. 6 is an enlarged cross section of one of the eccentrics for giving the
horizontal vibration to the shaker;
Fig. 7 is a similar enlarged cross section of one of the eccentrics for giving the
vertical vibrations.
A indicates the main frame, which may be of any desired form and construction.
B is the shaker, consisting of a frame resting inside the main frame and capable
of both a horizontal and vertical vibration. Č, C, are the screens, of which one
or more may-be-used-as may be desired.
In case but one is used it inclines and makes-a-separation at the outer end, the
tailings being thrown over and the screenings being dropped through-into-a-suit-
able receptacle. In case two are used, as shown in the drawings, the screenings
from the first are dropped on the head of the second, where another separation is
effected and the two grades are dropped into different receptacles a, b. Each of
these screens is pivoted at the upper end as shown at c, c, and the lower end is
adjustable higher or lower by means of a slotted hanger d, through which passes a
thumb screw. By this means the incline of the screens may be changed to meet
the necessities of the case. Where two or more screens are used they are of
different degrees of fineness, the coarsest being at the top, as shown in Fig. 1.
E is a suspension frame located above the main frame and free from contact
with the same. The shaker B is hung to this suspension frame by four spring
hangers f, ff, f, one at each corner. The lower ends of the hangers are attached
to the shaker about midway of its height, as shown at g, g. At top and bottom
of the hangers are nuts one above and the other below the parts to which the
hangers are attached, by which means the shaker can be adjusted higher or lower
in the main frame.
G is a shaft extending under the suspension frame E. and mounted in boxes h, h,

page_text: of the main frame. The shaft is provided at opposite ends with eccentrics i, i,
which rest and turn in boxes k, k, attached on the under side of the suspension
frame. By this means the suspension frame is supported and a vertical vibratory
movement is given thereto by the revolutions of the eccentrics. The shaft G may
be driven by any suitable means that shown in the drawings being a belt j passing
around a pulleye of the shaft and a larger pulley / below. This vertical vibration
of the suspension frame imparts corresponding vertical vibration to the shaker B,
by lifting it bodily and then dropping it again, so that the screens are not tilted
side-wise, but retain their transverse level position. m, m, are springs placed
under the suspension frame on two opposite sides, and serving to retain the upright
position of the suspension frame under vibration, and also to produce uniformity
of action, and to obviate shock. The springs are adjustable higher or lower by
means of set nuts as shown.
H is a shaft mounted in bearings n, n, at one end of the machine, and provided
with eccentrics o, o, which turn in boxes F, p. To these boxes are attached
rods q, q, which extend inward and are attached at the opposite end to a cross
bar r, having end pivots or journals that rest in the sides of the shaker B. By
this means the horizontal vibrations are given to the shaker and consequently to
the screens. The ends of the rods connecting with the cross bar are provided with
nuts by which the shaker can be adjusted. The pivots on the ends of the cross
bar prevent binding and allow the shaker to vibrate in a horizontal line.
I is a permanent hopper attached to the main frame, through which hopper
the material is fed from a spout. K is a supplementary hopper below the
main hopper and attached to the shaker B. These hoppers are separated by a
space sufficient to allow the vertical vibrations of the shaker, and while the top
hopper I is fixed and permanent, the other, K, moves with the shaker. t, t, are
flaps of cloth or other flexible material attached inside the upper hopper and
extending into the lower one and serving to prevent escape of the material at the
sides as it is fed down from one hopper to the other. The lower end of the
supplementary hopper K is made angular or hopper-shaped as shown, and is
provided with a hinged cover or valve u, pressed up to close the passage by means
of curved springs v, t, attached to the sides of the upper hopper and passing down
through a slot in the top of the main frame. Each of these springs passes through
an opening in a slide w, which is adjustable forward and back to give more or
less tension to the spring. As shown in the drawings this adjustment is produced
by means of a thumb screw that passes through a slot of the slide. By this means
the valve u is made to close with more or less pressure. The weight of the material
in the hopper pressing against the valve causes it to open just sufficiently to feed
the requisite amount down on the screen, and the springs resist this opening action,
but yield sufficiently to allow the feed. On the bottom of the fixed part of the
hopper K is an offset y, and to this is attached an inclined plate z, which opens
onto the screen. This plate serves to carry and spread the material, and is
preferably corrugated as shown, but may be made plain if desired. The supple-
mentary hopper K is fitted removably between side boards a², a², of the shaker
frame, to which it is attached by screws or otherwise, by which means it can be
inserted and removed at pleasure.
Various modifications can be made without departing from the spirit of the
invention. Cams may be used instead of eccentrics. Two shafts instead of one
may be used under the frame E, each having eccentrics, and the shaft H may have
a single eccentric instead of two.
By the use of the suspension frame E located above the main frame, and the
hangers connecting it with the shaker, a bodily vertical vibration can be imparted
to the shaker without tilting it to either side. The motion is a compound one,
the vibration being both horizontal and vertical. The horizontal motion spreads
the material and works it downward, while the vertical one gives it a toss, turns
it over, and presents different surfaces to the screen, by which means the flour is
more thoroughly sifted out.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is-
1st. In a bolting apparatus, the combination, with the shaker B, of a suspension
frame E located above the machine, hangers f, f, connecting the shaker with the
frame, eccentrics o, o, attached to a shaft H for imparting horizontal vibrations to
the shaker, and other eccentrics i, i, attached to a shaft G for imparting vertical
vibrations to the shaker, as specified.
2nd. In a bolting apparatus, the combination, with the shaker B, of a suspension
frame E located above the machine, hangers f, f, connecting the shaker with the
frame, eccentrics o, o, and i, i, attached to suitable shafts for imparting horizontal
and vertical vibrations to the shaker, and a set of springs m, m, interposed between
the suspension frame and a stationary part, for equalizing the action, as herein
shown and described.
3rd. In a bolting apparatus, the combination, with the main frame A and
shaker B, of a suspension frame E located above the main frame, hangers f, f,
connecting the shaker with the suspension frame, eccentrics o, o, and i, i, attached
to shafts imparting horizontal and vertical vibrations to the shaker, a hopper I
attached to the main frame, another hopper K attached to the shaker, with
flexible flaps covering the space between the two, a hinged valve u at the bottom
of the lower hopper, and spring v for holding the valve against internal pressure,
as and for the purpose specified.
4th. The combination of the hopper I attache to the main frame, the hopper K
attached to the shaker, the flexible flaps t, t, closing the space between the hoppers,
the valve at the bottom of the lower hopper, the spring v, v, for closing the
valve, and the slides w, w, for adjusting the springs, as described.
Dated this 4th day of April 1893.
ALLISON BROS.,
Agents for the Applicants.