Improvements in Apparatus for Separating Stones or Pebbles or Irreducible Lumpy Material from Olay or the like.
Year: 1891

page_text: Date of Application, 7th July, 1891-Accepted, 3rd Oct., 1891
COMPLETE SPECIFICATION.
Improvements in Apparatus for Separating Stones or Pebbles or
Irreducible Lumpy Material from Olay or the like.
A communication from abroad by DAVID WHITTAKER, of 1055, Cambridge
Avenue, General Business Man, LOUIS HARVEY HAMILTON, of 738, Marshall
Street, Salesman, FREDERICK EUGENE BROWN, of 644, Jefferson Street,
Salesman, and LEONARD WILLIAMS, of 2610, Sycamore Street, Cashier,
all in Milwaukee, in the County of Milwaukee and State of Wisconsin,
United States of America.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool & 6, Bank Street,
Manchester, both in the County of Lancastor & 323 High Holborn in the
County of Middlesex, Civil 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 :-
In the preparation of clay for manufacturing bricks, tiles or other articles, it is
necessary to separate and remove therefrom the pebbles or stone if any therein,
and the invention relates to a machine constructed and adapted for separating and
removing such pebbles or stones or irreducible lumpy material therefrom.
The machine is adapted for working the clay and removing the pebbles or stones
therefrom, ordinarily, in the condition in which it is when taken from the ground,
but if too hard for easy working, then with the addition of such water as may be
required to reduce the clay to a plastic consistency.
The invention consists of mechanism for forcing the material through the
machine, a means for automatically separating the pebbles or stones from the clay,
a pocket or auxiliary receptacle in which the pebbles or stones are accumulated
and means for removing them from the machine.
In the drawings :-
Figure 1 is an elevation of the complete machine.
Figure 2 is a central, vertical section of the same machine.
Figure 3 is a bottom view of the separator.
Figure 4 is a transverse section of the separator on the line 4-4 of Figure 2
looking downwardly.
A is a frame on which the operative mechanism is supported. A case B,
advisably in cylindrical form and having a funnel shaped top C, is supported on the
frame A preferably vertically, and at its lower end opens into an auxiliary
receptacle D, also preferably made in cylindrical form. The receptacle D is pro-
vided with sliding doors E E and with a large number of apertures F F, preferably
elongated slots, formed in the sides of the recoptacle advisably in the walls of the
receptacle and also in the doors E E. The central part of the bottom of the
receptacle D is thrown upwardly a distance conveniently in frustro-conical form,
forming a chamber G in the receptacle D at the side of and below the top of
the re-entering part of the bottom of the receptacle. The bottom of the receptacle
consists of the outer, bottom part H, of the inner upwardly extending circular
wall I and the top K. The part H of the bottom is provided with gates or
slides H. The top K of the re-entering part of the bottom of the receptacle is
provided with a large number of apertures L L preferably constructed as elongated
slots and advisably arranged in circles therein, whereby this portion of the bottom
is adapted for and becomes a screen The bottom H and the gates H¹ therein are
also slotted or perforated. The top or screen of the re-entering part of the bottom
is of about the same diameter horizontally as the diameter of the case B.
A revoluble shaft M is located centrally of the case B and has a journal bearing

page_text: in the top K and another journal bearing in the frame A. This shaft is provided
with a beveled wheel N meshing with a pinion O on a
driving shaft. An inter-
mediate journal bearing P is preferably provided in the lower part of the case for
the shaft M to still further steady and support the shaft. The shaft is also provided
with a screw R which may be either in continuous form, or in a series of screw.
blades extending without intermission or with but small separation from the funnel
down nearly to its lower extremity. This screw is adapted, as 'the shaft is rotated,
to force the contents of the case downwardly therein, and partly into the receptacle D
and partly out through the apertures.
A scraper S, consisting of two laterally extending arms advisably reversely
curved outwardly rearwardly with reference to their line of rotary motion, is fixed
on the lower end of the shaft M just above the screen K.
Radial arms T T, fixed in the shaft M near the top of the receptacle D, are also
preferably provided, which arms carry rigid thereon the downwardly projecting
blades UU inclined rearwardly to their line of rotary motion. These blades U¸Ù
are located outside the circle described by the screw R and above the annular
chamber G. These arms TT with their blades U U are not necessary to the
complete and successful working of the machine and their omission does not, with
most qualities of material, detract from or reduce the efficiency of the machine.
A tank, V is located below the receptacle D to receive the clay discharged
therefrom.
The operation, of this device is as follows :'
A supply of plastic clay containing pebbles or stones is fed into the case B
through the funnel C, and, as the shaft M rotates, the mass of clay and contained
pebbles is carried downwardly against the top K of the re-entering part of the
bottom of the receptacle D, through which it mostly passes, the revolving scraper S
serving to constantly keep the surface of the top K comparatively clean, forcing
the, pebbles and stones laterally towards the sides of the receptacle, while the
constantly renewed supply of clay forced downwardly by the screw M presses
against and passes through the screen K falling into the tank V. As the pebbles
and stones are forced off the sorcen K laterally towards the side walls of the
receptacle D, they fall into the chamber G, and, as this chamber fills up with
stones, pebbles and a certain portion of the clay that is forced, laterally off the
screen K by the soraper S, the plastic clay will, by reason of the pressure on the
material in the machine, be forced out through the apertures in the sides of
the receptacle D and through the apertures in the bottom Hand gates H¹.
When a considerable supply of pebbles and stones has accumulated in the auxiliary,
receptacle D, either in the chamber G or above it, the door E E in the sides of the
receptacle or the gates H¹ H¹'in the bottom or both may be opened and the stones
and pebbles removed from the receptacle.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is ::**
'
T
1. In a stone separator, the combination, with a suitable caso, a feed device
therein arranged to force the material through the case in the direction of its
length, and a screen at the discharging end of the feed device arranged at right'
angles to and across the direct line of movement of the material through the case,
the apertures through the screen being of a size to permit the passage of plastic
clay and to prevent the passage of stones, of an auxiliary receptacle located at the
side of and beyond the end of the feed device and of the screen, apertures in the
walls of the auxiliary receptacle to permit the passage of plastic clay and to
prevent the passage of stones, and doors in the walls of the auxiliary receptacle
for the removal of stones, substantially as described.
2. In a stone separator, a case having a screen at its
device, an automatically, operating cleaning device and
charging end of the case adapted to receive and retain
20. G
discharging, end, a feed
receptacle at the dis-
pebbles and stones and

page_text: having apertures to permit the passage therefrom of plastic clay,, all combined
substantially as described.
3. In a stone separator, the combination, with a suitable case and a therein
revolving shaft and feed device, of a receptacle at the discharging end of the case,
which receptacle 'hasia centrally re-entering bottom, the re-entering part having a
screen top, and a scraper fixed to the revolving shaft and located just above the
screen and adapted as the shaft revolves to clear the surface of the screen and to
force pebbles and stones laterally beyond the scraper, substantially as described.
4. In a stone separator, the combination, with a case, a therein rotating shaft
and feed device, a screen at the end of the shaft across the direct line of movement
of material in the case, and a scraper fixed to the shaft and adapted to auto-
matically clear the screen of stones and force them laterally therefrom, of an
auxiliary receptacle at the side of and beyond the screen, doors in the walls of the
auxiliary receptacle for the removal of stones, and other unclosed apertures in
the walls of the receptacle for the passage of plastic clay only, substantially as
described.
5. In a stone separator having a suitable case and a revolving feed screw
therein, the combination, with an auxiliary receptacle located at the lower terminal
ond of the feeding screw, which receptacle has perforated sides and sliding doors
and a re-entering central part of its bottom, of radial arms fixed in the shaft
carrying inclined blades as UU, substantially as described.
6. In a stone separator, a receptacle as D having perforated sides and bottom,
aud doors in the sides and bottom, the bottom having re-entering central part in
combination with a scraper located immediately above the top of the re-entering
part of the bottom, radial arms as T carrying inclined blades as U U and means
substantially as described for carrying and rotating the scraper and the arms, and
for receiving and feeding the material into the machine.
Dated this 6th day of July 1891.
WM. P. THOMPSON & Co.,
Agents for the Applicant.