IMPROVEMENTS IN FLOUR SIFTING MACHINES
Year: 1882

page_text: LETTERS PATENT to Hermann, Emil Ludwig Bauermeister. of Hamburg,
German Empire. for an Invention of "IMPROVEMENTS IN FLOUR SIFTING
MACHINES
"
PROVISIONAL SPECIFICATION left by the said Hermann Emil Ludwig
Bauermeister at the Office of the Commissioners of Patents on the
23rd December 1882.
HERMANN EMIL LUDWIG BAUERMEISTER of Hamburg German Empire,
IMPROVEMENTS IN FLOUR SIFTING MACHINES
"
This invention relates to improvements in flour sifting machines in which
centrifugal flyers operate or revolve inside a gauze covered reel, or drum and the
objects of the improvements are both to rub off the gluten from the hulls and to
separate the flour entirely in the most efficient manner from the offal also sparing
as completely as possible the gauze envelope or cover of the reel or drum. Inside
the gauze covered reel, which is fastened to a hollow shaft rotate two flyers in a
direction, which is opposite to the rotation of the reel. The arms of these flyers
are of different lengths, those which bear the parabolic scrapers, are nearly twice as
long as those provided with the rejectors. Both rejectors as well as scrapers are
shaped lengthways in such a manner as to form long or quick pitch screw lines
around the ideal cylinders and described by their flyer arms. The meal taken or
scraped off from the gauze by the scraper is thrown in consequence of the parabolic
form of such scrapers nearly diametrically through the reel and partly will touch
that part of the gauze, which is opposite to the throwing or outer scraper and
partly is caught by the inner rejector and rejected or thrown towards the gauze in
an angle corresponding with the inclination of such rejectors or throwers to a
radius of a circle around the centre shaft of the flyers.
The effect of such arrangement is a frequent mutual crossing of the very long
throwing lines (rays of the grit) thus causing the gluten to be rubbed off completely
from the hulls simultaneously to diminish the force of the throw and thereby to
save or protect the gauze from destruction.
i

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Hermann Emil Ludwig Bauermeister in the Great Seal Patent
Office on the 25th May 1883.
HERMANN EMIL LUDWIG BAUERMEISTER of Hamburg German Empire
"IMPROVEMENTS IN FLOUR SIFTING MACHINES
"
This Invention relates to improvements in flour* sifting machines, in which
centrifugal flyers operate or revolve inside a gauze-covered reel or drum and the
objects of my improvements are to rub off the gluten from the hulls and to
separate the four entirely in the most effective manner from the offal also sparing
as completely as possible the gauze envelope or cover of the reel or drum.
I attain these objects by the mechanism illustrated in the accompanying
drawings, in which-
Figure 1 is a vertical cross-section of a sifting-machine provided with my
improvements; figure 2 is a side-elevation thereof, partly in section; figures 3
and 4 are detailed views of the centrifugal flyers.
Similar letters refer to similar parts throughout the several views.
Inside the gauze-covered reel a, which is fastened to the hollow shaft d, rotate
two flyers c and c¹ fixed to the shaft b in a direction, which is opposite to the
rotation of the reel. The arms of these flyers are of different lengths; those of c
which bear the scrapers c¹ of parabolic cross-section, are nearly twice as long as
those of e provided with the rejectors c¹. Both rejectors as well as scrapers, are
shaped lengthways in such a manner as to form screw lines of quick pitch, around
the ideal cylinders described by their flyer arms. The meal taken or scraped off
from the gauze by the scrapers c¹ is thrown (in consequence of the parabolic form
of such scrapers) nearly diametrically through the reel and partly will touch that
part of the gauze, which is opposite to the throwing or outer scraper, and partly is
caught by the inner rejectors e¹ and rejected or thrown towards the gauze in an
angle corresponding with the inclination of such rejectors or throwers to a radius
of a circle around the centre shaft of the flyers b. An inclination of about
45 degrees will produce nearly always the best effect; anyhow the angle may vary
according to the fineness of the gauze and to the number of revolutions which the
reel a makes within a given time.
The effect of such arrangement is a frequent mutual crossing of the very long
throwing-lines, thus causing the gluten to be rubbed off completely from the hulls;
simultaneously to diminish the force of the throw and thereby to save or protect
the gauze from destruction.
I am aware, that prior to my invention, flour-sifting-machines have been made
with double flyers. I, therefore, do not claim such combination broadly, but what
I do claim as my invention, and desire to secure by letters patent, is :-
The combination in flour-sifting-machines of the reel a, shaft 6, flyers c con-
structed with concave blades or scrapers c¹ and flyers e constructed with
backwardly inclined rejector blades e¹, substantially as and for the purpose
specifi ed
In witness whereof I the said Hermann Emil Ludwig Bauermeister have
hereunto set my hand and seal this Twenty first day of May in the year
of our Lord One thousand eight hundred and eighty three.
HERMANN EMIL LUDWIG BAUERMEISTER (L.S.)