IMPROVEMENTS IN MIDDLINGS-PURIFIERS
Year: 1883

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex for an
Invention of IMPROVEMENTS IN MIDDLINGS-PURIFIERS a communication to
him from abroad by John D Hurst, of the State of Oregon, United States of
America
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan
at the Office of the Commissioners of Patents on the 11th January 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "IMPROVEMENTS IN
MIDDLINGS-PURIFIERS," a communication to mo from abroad by John D. Hurst,
of the state of Oregon, United States of America,
This invention relates to middlings-purifiers and consists in certain elements of
mechanism and combinations of parts as hereinafter specified.
The invention consists in the combination of a vibrating frame containing a
series of screens arranged in successive order with the front end of one below the
rear-end of the preceding one, with stationary perforated pipes situated under the
screens and made tapering toward their rear ends, and fans serving to force air
through the said perforations.
Also in a vibrating frame, containing a series of screens arranged successively
with the forward end one below the rear end of the preceding, in combination with
reciprocating rubbers placed at a distance apart equal to the travel thereof, whereby
the screens are kept constantly cleaned. Also in a series of stationary perforated
pipes gradually reduced throughout their length and provided with removable
stoppers in combination with an air box, and fans communicating with said pipes.
Also in a vibrating frame containing a series of screens arranged in successive order
and a series of stationary perforated pipes tapering throughout their length, in
combination with supply fans and an exhaust fan and an air chamber communi-
cating with the exhaust fan, and having valved openings and dead air spaces or
pockets for collecting heavy impurities.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
11th July 1883.
"IMPROVEMENTS IN
HERBERT JOHN HADDAN, of Kensington, Middlesex
MIDDLINGS-PURIFIERS," a communication to me from abroad by John D. Hurst,
of the State of Oregon, United States of America
This invention relates to improvements in middlings-purifiers; and the invention
consists in certain elements of mechanism and combinations of parts, as hereinafter
fully set forth and pointed out.
In the accompanying drawings, Figure 1 is a plan view of the improved purifier.
Fig. 2 is a longitudinal sectional elevation. Fig. 3 is a front elevation, and Fig. 4
a transverse sectional elevation, of the same. Figs. 5 to 8, inclusive, are detailed
views of some of the various parts.
The same letters refer to the same or corresponding parts throughout the several
views.
In the said drawings, A A represent the outer casing of the machine, in which is
suspended the vibrating frame B, containing the screens a b c, which are made in
the ordinary manner of bolting-cloth, and arranged in a series, as shown in Fig. 2,
with the front end of one a short distance below the rear end of the preceding one,
with an open space between. Under the vibrating frame B is a number of tubes
or pipes, C, perforated along the upper side and opening at the front end into a
chamber or box, D, into which air is forced by the fans or blowers E E. The
pipes C are placed sufficiently close together so that the air issuing from the
perforations therein will cover the whole surface of the cloth on the screens a, b,
and .c. They are tapered alightly throughout their length, with the rear ends
projecting through the outer casing, A A, and closed by removable stopper e.
front ends, where they join the box D, fit over nipples or flanges e¹ secured to said
box D in such a manner that the pipes may be readily removed when desired.
The
F is the exhaust-fan, placed in the top of the casing A. A, and inclosed by the
irregular partition G, through which is formed a number of openings, o, closed by
valves o, and a series of depressions, d, which I term "dead-air chambers," and each
of which is provided at the bottom with a small door, d¹, for the purpose hereinafter
more fully set forth.
Under each of the screens a, b, and c is a series of rubbers, r, r, which consists of
strips f, covered with sheep-skin with the wool left on, or other suitable soft
substance. The rubbers extend clear across the width of the screens, and are
supported at each end on sliding strips 8, which reciprocate on the stationary
slides, supported at each end by pieces h of iron or other suitable material,
shaped as shown in Fig. 7, and secured to the frame-work of the outer casing, A A,
in such a manner that they may be adjusted up or down, pressing the rubbers r
with more or less force against the cloth of the screens.
His the feed-hopper, in the bottom of which is the variable automatic feed,
which consists of the hinged part J of the hopper bearing against a roller, h³,
turning in the bottom of the hopper H, against which it is pressed by a weight, w,
on the rod or lever L. C and C³ are conveyers, arranged in the bottom of the
machine in the ordinary manner, for conveying the refined middlings to a suitable
discharge-opening.
The power to drive the machine is supplied to one end of the shaft S, on which
is the exhaust-blower F referred to above, and from the other end is transmitted
by belt to the shaft S¹, on which are secured the blowers or fans E E.
A vibratory movement is imparted to the frame B by an eccentric, n, secured on

page_text: +
the shaft S', the high point of which, striking the curved arm k, attached to the
end of the vibrating frame B, draws it forward, when it is returned by springs v v.
The reciprocating rubbers r receive their motion through medium of a pitman, x,
from a crank, c², on a shaft, c³, which is slowly rotated by belt or otherwise from
shaft S. The throw of the crank is equal to the distance between the rubbers,
so that the whole surface of the cloth is gone over at each stroke of the rubbers.
The conveyers C³ and C³ receive their motion by suitable gearing from shaft S', as
does also the roller h² of the automatic feed.
The operation is as follows: The middlings to be purified enter at the hopper
until there is sufficient to press the hinged part J from the roller, leaving an opening,
through which the middlings are evenly fed by the rotating roller h³ and fall on the
forward end of the first screen, over which they are made to travel by the vibrations
of the frame B and fall successively on and travel over the remaining screens of
the series. The air from the pipes C passes up through the screens, taking up the
light Buffy stuff, allowing the heavy screened middlings to fall into the con-
veyers CC, and from thence to the discharge spout. Each screen being raised
above the succeeding, with a space between, the middlings fall successively from
one to the other, and while falling are subjected to a current of air from the pipes
passing in the opposite direction, more thoroughly purifying them. The light fluffy
stuff is drawn up by the exhaust-fan F through the openings o, which may be more
or less closed by the valve o', thus distributing the draft over the different screens
as desired, and, passing over the depressions or dead-air chambers d, allows any
heavy substance which may have been carried up by the draft to settle in the
depression, from whence it may be removed from time to time, or may be allowed
to drop back on to the screens through the doors d'. By having the pipes C
gradually reduced in size from front to rear the force with which the air issues
from the perforations therein is kept uniform throughout. If the pipes should from
any cause become stopped or partially filled with dust or other substance, they may
be readily cleaned by removing the stoppers e at the rear end and allowing the
blast from the fans E E to pass directly through them,
1. In a middlings-purifier, the combination of the adjustable rubber r, consisting
of a strip, covered with suitable soft substance, sliding piece S, and slide S¹, with
the slotted frame A, angle-bar h, and set-screws for adjusting the slides vertically,
substantially as shown and described.
2. In a middlings-purifier, the combination with the reciprocating frame B, and
the screens a bc, arranged at different levels in a series upon said reciprocating
frame, of the series of adjustable rubbers r, arranged at different levels to suit the
screens, and mechanism for operating said rubbers in such a manner as to sweep
the entire under surface of the screens, substantially as shown and described.
3. In a middlings-purifier, the combination of the blower fans E E, a series of
graduated and perforated tubes, CC, the reciprocating frame B, screens a b c
arranged thereon in an overlapping series at different levels, the adjustable
rubbers rr, hopper H, irregular portion G, having valved openings, the dead-air
chamber d, and the exhaust-fan F, all substantially as and for the purpose
described.
4. The combination of a vibrating frame B, containing a series of screens arranged
in successive order with the front end of one below the rear end of the preceding
one with the stationary perforated pipes C, made tapering toward their rear ends
and fans E E substantially as shown and described.
5. A vibrating frame B, containing a series of screens arranged successively with
the forward end one below the rear end of the preceding, in combination with
reciprocating rubbers.r, placed at a distance apart equal to the travel thereof
whereby the screens are kept constantly cleaned substantially as described and
shown.

page_text: 6. A series of stationary perforated pipes C, gradually reduced throughout their
length and provided with the removable stoppers e, in combination with the box D,
and fans E, substantially as shown and described.
7. A vibrating frame B, containing a series of screens arranged in successive
order as shown and described, and a series of stationary perforated pipes C, tapering
throughout their length, in combination with the supply fans E, E, and exhaust
fan F, and air chamber G, having valved, openings o and dead air space d
substantially as described and shown.
In Witness whereof I the said Herbert John Haddan have hereunto set my
hand and seal this 11th day of July A.D. 1883.
H J. HADDAN (L.S.)