A New or Improved Appliance for Assisting the Passage of Materials Over Flat Sieves.
Year: 1893

page_text: COMPLETE SPECIFICATION.
A New or Improved Appliance for Assisting the Passage of Materials
Over Flat Sieves.
I, HANS BITTINGER of Darmstadt, in the Grand Duchy of Hessia, German
Empire, Manager 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 :-
My invention relates to transporters for flat sieves and rests upon the observa-
tion, that horizontal or inclined sieves transport much more quickly, if a cover
lies loosely upon the sifting product, sliding over the sieve, in such a manner, that
it is raised at the pushing forward of the sieve, thus freeing the sifting-goods,
whilst it falls back on the latter at the going backward of the sieve, thereby
preventing the sieving-goods from the backward movement.
I will now proceed to describe my invention with reference to the accompanying
sheet of drawings, in which
Figs. 1, 2, 3 show longitudinal sections of sieves with the transporter lying
thereupon,
Figs. 14, 24, 34 show longitudinal sections of sieves with tho raised transporter,
Figs. 1, 2, 3 show transverse sections of these sioves.
Similar letters indicate similar parts throughout the different views.
A refers to the complete sieving-apparatuses, which are put into a rotary or
shaking motion by means of eccentrics or crank-pins and in which the trans-
porters B are arranged on the frame in such a manner, that they may be raised by
pushing the sieve in the transporting direction, in ordor to let pass the sifting-
goods, on which the transporters rest firmly at the backward movement of the sievo.
The transporters B may be massive, perforated, grated, or ribbed and may
therefore consist of a solid cover, a grate, a sieve-like cover or a wire-gauze.
In Figs. 1, 14 and 1º the transporter B rosts with its lateral pins C in the
tooth-formed slots, arranged at the lateral frame of the siove.
Figs. 2, 24 and 2 show the transporter hinged in joints, which may be replaced
by chains or straps.
Figs. 3, 34 and 3B show the transporter hanging on springs, being thereby
attached to the upper-side, as shown in Fig. 3, or to the under-side of the
transporter, so that the latter rests or stands on springs.
If the sieve is moved in the running-off direction, the sifting goods as well as
the transporter moves in this direction by the received push. The transporter is
raised at the synchronous going forward by means of its pins, joints or springs and
the sifting-goods may pass below the transporter in consequence of the vis inertia.
At the going backward of the sieve the transportor falls quickly back on the
sifting-goods on account of its gravity and of the push imparted by the backward
movement, thus shutting down on and preventing the sifting-goods from going
backwards.
Several of these sieves may be connected below or beside each other so as to
form one common sifting-apparatus.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that
what I claim is :-
r
In shaking or swinging sieves: The arrangement of massive, perforated, grated

page_text: or ribbed covers or transporters, being raised or lowered automatically by the
movement of the sieve, substantially and for the purpose as described.
Dated this 27th day of January 1893.
HANS BITTINGER,
By Geo. Thos. Hyde,
4, Moorfields, Fore Street, London, E.C., Agent for the Applicant..