IMPROVEMENTS IN THE PROCESS OF PERIODICALLY OR CONTINUOUSLY EXTRACTING OR REMOVING SEDIMENTS OR PRECIPITATES OF ALL KINDS DURING AND WITHOUT INTERRUPTING THE SEDIMENTARY PRECIPITATING OR CLARIFYING PROCESS, AND IN THE PRESENCE OF THE FLUID FROM WHICH THE SAID SEDIMENT OR PRECIPITATE IS BEING FORMED; AND IN APPARATUS TO BE EMPLOYED IN CONNECTION THEREWITH
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Gottfried Bacher at the Office of the
Commissioners of Patents on the 14th October 1882.
GOTTFRIED BACHER, Director of Mines, of the Town of Kladno in the Empire of
Austria "IMPROVEMENTS IN THE PROCESS OF PERIODICALLY OR CONTINUOUSLY
EXTRACTING OR REMOVING SEDIMENTS OR PRECIPITATES OF ALL KINDS DURING
AND WITHOUT INTERRUPTING THE SEDIMENTARY PRECIPITATING OR CLARIFYING
PROCESS, AND IN THE PRESENCE OF THE FLUID FROM WHICH THE SAID SEDIMENT
OR PRECIPITATE IS BEING FORMED; AND IN APPARATUS TO BE EMPLOYED IN
CONNECTION THEREWITH."
My Invention relates to "Improvements in the process of periodically or con-
tinuously extracting or removing sediments or precipitates of all kinds during and
without interrupting the sedimentary precipitating or clarifying process and in the
presence of the fluid from which the said sediment or precipitate is being formed
and in apparatus to be employed in connection therewith.
The chief novel feature in my said invention consists in the employment of a
moveable and transportable bottom which is at a distance slightly above the
bottom of the vessel conducted through the vessel and afterwards led out of the
vessel up the side of the same in a slanting or inclined direction.
At the same rate as the moveable bottom with the sediment upon it leaves the
one side of the vessel or receptacle an empty bottom enters at the other side so that
the bottom of the receptacle is always covered by a moveable or sliding bottom,
whether the operation is carried out continually or with interruptions.
As the sliding bottom has to move in varying directions it must be made flexible.
It can be made of various materials for instance, Iron, steel, wood, coutchouc, Felt
webfabric or other suitable material, and can be constructed as an endless band or
as a band with ends with or without an edge or border.
The surface of the same can according to the character of the sediment be made
Bmooth, uneven, rough milled or provided with laths, can be pervious or impervious
to water.
In order to cause the transportable or moveable bottom to move in the proper
direction guides are arranged which said guides consist of round or polygonal or
other rollers or a combination of such said rollers.
The motion of the sliding bottom can be effected by hand or by a machine at
intervals or without interruption.
The removal of the sediment or precipitate from the sliding bottom can be
done by hand or by a suitable mechanical arrangement.

page_text: The sediment can also be dried while it is upon the band or sliding bottom by
exposing it to the air or an artificial drying can be produced by causing the band
or sliding bottom to pass through warmed chambers or apartments.
The degree of incline at which the sliding bottom leaves the receptacle or vessel
depends upon the fineness of the grain, the weight and general character of the
sediment and for ordinary purposes it can be made more steep than otherwise by
means of cross pieces.
The vessel or receptacle for the sedimentary fluid consists of a right angled tank
or cistern whose length is greater than its breadth; with slanting side or end.
The fluid containing the sediment enters at the spout and flows along the tank
or cistern towards the outlet where it flows off in a clear state having previously
had time to deposit its sediment.
The sediment is collected on the sliding bottom and is transported out of the
receptacle by means of the same and is removed from this bottom by means of a
suitable apparatus.
The emptied bottom goes backwards round the rollers descends through the clear
fluid and after passing the one roller is again in a position to receive the sediment.
In this example the sliding bottom consists of an endless band which is
constructed of two angle iron chains upon every two links of which narrow boards
are fixed, which said boards butt one against the other, and so form one continuous
bottom, which at the same time can easily move round the desired course.
The three principal curves of the band are effected as stated by the rollers which
consist of a pair of octagonal discs around which the angle iron chains turn.
The space between each pair of discs remains unoccupied so that the boards can
pass without being crushed.
The tension of the band is principally in the chains and the strain exerted by
the octagonal discs is transferred only to the chains.
The motion of the band or sliding bottom is effected by means of a screw and
worm wheel which latter is fixed to the same axle as the disc.
The guiding at that point where the band quits the horizontal plane to ascend
the incline, small rollers or discs are employed; which also come only into contact
with the two chains permitting free passage to the boards and the sediment on
the same.
System or arrangement 2 is a modification of the method of guiding the moveable
bottom.
In this case the vessel or receptacle is provided at both ends with an inclined
plane so as to permit the sediment to be conducted out at both ends. In this case
the moveable bottom returns underneath the vessel or receptacle.
Two rollers serve alternately as draftrollers and thus the band or bottom works
to and fro being wound alternately round the rollers, and the sediment is ejected at
one end of the tank and then at the other.
It will thus be seen that the carrying out of the sediment can be effected during
the sedimentary process without disturbing the same entirely independent whether
the water is in motion or stagnant. The arrangement is also serviceable when it is
desired to remove the sediment in the absence of the fluid.
These improvements are applicable for every process of obtaining sediment or
precipitates which may occur in any branch of industry and can be carried out on
the smallest or most extensive scale. The arrangement is however specially
adapted in the preparation or washing of ores or coal; and if several superpoised
bands or moveable bottoms are employed sediments or precipitates of various
degrees of fineness can be obtained.