Year: 1888

page_text: Date of Application, 27th Aug., 1888
Specification Accepted, 12th Oct.. 1888
We, FRIEDRICH WILHELM LÜHRMANN, Engineer, and ALBRECHT STEIN, Manu-
facturer, both of the Town of Wetzlar in the German Empire, 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 invention relates to an improved transport cylinder with interior helical
transporting blades for transporting any desired kind of material from the finest
powder to the largest lumps of ore or any other matter.
Transport devices, as such, are well known to all acquainted with technical
matters, the same are employed in flour and other mills for transporting the grain
and also for transporting Hour, powdered colours in colour mills and for various other
purposes.
All the present devices whether consisting of spiral blades fixed to a central shaft,
of a worm or other similar arrangement all possess many disadvantages. For instance,
if material or coarser grain than the device is specially adapted to is fed into the same
the transport device will become clogged by the coarser material filling up. tho space
which ought to remain free between the worm or spiral blades and the walls of the
casing thus causing either a breakage of the blades or a stoppage of the transport. so
that a difficult, expensive and wearisome cleansing of the apparatus is necessary.
still greater disadvantage of the present transport apparatus is that only one kind
of material can be transported without thoroughly cleaning the same as it is
impossible to remove all the material from the space between the blades and tho
casing.
A
The object of the present invention is to avoid all these disadvantages and produce

page_text: a transporting device which will transport the finest powder as well as the coarsest
grained or lumpy material, such as the finest flour, fine ground paints, white lead and
other fine ground matter and also coal, ores, bricks and other material. No worm or
spiral with central shaft or connection being employed the material transported will
not be injured or crushed for the reason that the transport blades are cast onto or fixed
to the casing so that the centre remains free.
The material is not transported in spiral line or subjected to a mixing operation but is,
on the contrary, transported in a horizontal straight line so that the material will
leave the transport cylinder in precisely the same succession and exactly the same
condition as it entered the said cylinder, and as the cylinder can be driven from
or more parts no torsion can occur as is the case with the customary
any one
apparatus.
The entire quantity of material entering the cylinder is transported out of the same
without any residue whatsoever so that various kinds of material can be transported in
succession without any admixture of the same taking placo.
Another important feature of the present invention is that no driving shaft and no
bearings of any kind are employed within the cylinder so that hot materials such as
slag and other matter can be transported which is impossible with other transporting
devices in consequence of the central shaft, bearings etc., whereas in the presont
invention the inclined surface of the transport blades runs uninterruptedly from one
end of the cylinder to the other.
The improved transporting cylinder can be driven in any suitable manner and as
aforesaid from any part of the same by means of straps and drums, gear wheels,
chains and chain wheels etc., whereas the shaft of the present transport devices can
only be driven from the ends of the same. This advantage will be especially
apparent with long transport cylinders which can be simultaneously driven from
several points.
The material can furthermore be transported without coming in contact with the
atmosphere and it will be evident that when materials are transported which evolve
gases or dust no such gas or dust can escape and with materials which require pro-
tection from dust that all dust can be absolutely excluded. Another advantage to be
attained by employing the present improved transporting device is that the direction
can deviate from a straight line as several cylinders can be connected under a suitable
angle so that their movement is in no way hemmed.
The extreme simplicity of the construction and arrangement of the improved
transport cylinder assures a minimal wear and tear of the parts and the apparatus
requires a minimal amount of power for driving the same.
Fig. 1 is a vertical longitudinal section.
Fig. 2 a vertical section rectangular to Fig. 1.
Fig. 3 is a plan or top view of the transport cylinder.
A is the transport cylinder which can be made of one piece or of two half cylinders
connected by suitable flanges and which can be carried by suitable antifriction rollers B
which have their bearings in appropriate standards C.
The interior surface of the cylinder A is provided with the inclined or screwlike
transporting blade or blades D which can be cast of one piece with the cylinder or
attached in appropriate manner to the same.
When the cylinder is rotated the inclined surface of the blade or blades D will

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 wo
claim is
1. The improved transporting device consisting substantially of a rotary cylinder
driven in appropriate manner from the exterior and provided with a transport blade
or blades Dou the interior surface so that the materials are transported without
mixing, crushing or breakage, substantially as and for the purpose set forth.
2. Our improved transporting device substantially as and for the purpose set forth,
or any mere modification of the same.