IMPROVEMENTS, IN STIRRING DEVICES FOR DRYING APPARATUS AND THE LIKE
Year: 1885

page_text: دريل
I, EMIL ALBERT STRIEBECK, Chemist and Engineer of 44 Kaiserstrasse, Magdeburg,
Prussia, German Empire do hereby declare the nature of my invention for
"IMPROVEMENTS, IN STIRRING DEVICES FOR DRYING APPARATUS AND THE LIKE"
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:-
i
This invention relates to an improved construction of stirring devices for drying
apparatus of the kind used for drying, decomposing or concentrating chemical
products such as soda, bi-carbonate of sodium etc., and the object of the invention
is to prevent the stirring beaters or scoops from becoming fixed or stuck through
the adherence thereto of the material in the apparatus and the sticking of the.
material to the sides of the apparatus through burning.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figure 1 is a sectional
view showing the arrangement of the stirring apparatus within the reducing pan
or roasting chamber. Figure 2 is a sectional view on a larger scale showing the
end of one of the arms carrying a beater or scoop and provided with my arrange-
ment for preventing the fixing or sticking of the beaters or scoops. Figure 3 is a
plan of Figure 2; figure 4 is an elevation of-figure 2 seen from the oscillating shaft
of the apparatus; figure 5 is a sectional elevation of part of the apparatus. Similar
letters in all the figures represent similar parts.
The stirring mechanism consists of an oscillating shaft w (shewn in figure 1. of
the Drawing) plaeed in the centre of the bottom compartment of a circular stirring
apparatus such as is employed in chemical industries for drying purposes. To this
shaft are attached two arms r, r, which carry beaters or scoops 8, 8, moving upon
pivots or joints b. The shaft w oscillates to a sufficient extent to raise one of the
arms r, so as to bring it into a horizontal position at each oscillation. As.
the shaft w, oscillates the beaters or scoops 8 scrape the product to be dried, or
the thickening mass, or the heated ore as the case may be off the surface of the
vessel p, so that the sticking of the material theroto by burning is obviated. In
order to prevent the beaters or scoops s from becoming fixed on their joints b,
I provide the said beaters with arms a, and a¹, fixed thereto, which arms in the
Duino A77

page_text: upward movement of the arms r, strike against projections or spurs u, fitted to
the edges of the pan p. These projections u, force the beaters 8, to turn upon their
joints b, thereby enabling them to act efficiently again after the stirring mechanism
has swung back into its original position.
When the arms r, swing upwards with the beaters 8, of the stirring apparatus,
which beaters rotate upon the rods b, at the ends of the arms r, then the arm a', of
the uppermost beater 8, lying closest to the inside of the pan will first come in
contact with the striking plate u, which turns upon a hinge t, the height of which
can be adjusted according to requirement by means of a slot v, in the support h,
attached to the edge of the pan p. This striking plate u, normally inclines towards
the inside of the pan..
The dotted lines in figure 2, represent the position of the parts when only the
arm a, has reached the striking plate u; owing to the leverage resulting from the
weight of the plate u, the beater 8, whether it be hanging in its normal position or
has assumed an abnormal one from becoming clogged or fixed, will invariably be
kept pressed against the side of the pan p.
As the stirring arm 7 continues to ascend the beater 8 will keep sliding along the
side of the pan until the arm a also strikes against the plate u, which plate at the
same time moves upon the hinge t.
Both the arms a and a', then press against the under side of the plate with their
upward bent ends, consequently the beater s moving upon the rod b will swing
towards the inside of the pan and thereby move away from the side thereof. as
shewn by the full lines in figure 2-When the stirring mechanism swings back
again the said movements are repeated in an inverse order.
Instead of employing a moveable plate u,, as shewn in the drawing, a fixed
striking plate or spur can be provided for producing substantially the same effect
as will be well understood-The' object of the invention is to cause the jointed
beaters as the stirring mechanism ascends to strike against some resisting body at
the end of their upward swing, the resistance causing the beaters to move upon
their joints.
It is of course understood that a similar arrangement is provided on the other
side of the pan for the other stirring arm Ț.
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
:
1. In oscillating stirring devices for drying apparatus such as is used in chemical
industries and the like for drying, decomposing and concentrating purposes, the
employment of a fixed or a movable striking plate or spur, which will cause the
beaters to move upon their joints towards the end of their ascent substantially as
and for the purpose hereinbefore described.
2. The improved stirring device for drying apparatus and the like herein before
described and represented in the accompanying drawing.