Year: 1888

page_text: We MATHIAS HOFHERR and JOHAN SCHRANTZ of No. 26 Erlach Street in the
City of Vienna in the Empire of Austria Agricultural Engineers, 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 :-
In ordinary Threshing Machines the threshed straw before it leaves the Machine
passes over the straw-shaker, which has to separate the remaining grain from the
straw by shaking.
The straw-shaker however owing to imperfect threshing, or the moisture of the
crop seldom works faultlessly, and there always remains some of the grain in the
straw to be consequently lost.
In order to remedy this fault the makers of some Threshing Machines have
removed the upper seive frame and replaced it by a suitably perforated box upon
which the straw falls for additional cleaning after leaving the shaker. It soon
became evident however that this construction did not satisfy expectations, as not.
only the great weight of the sifting box, but also its awkward position and the
resulting noisy and shaking motion, proved to be injurious to the durability of the
machine.
Moreover the swinging motion imparted to the box proved completely unsuitable
to effect a satisfactory cleaning of the straw.
In our improved separator these difficulties are successfully overcome as will be
seen on reference to the accompanying drawings in which
Fig. 1 shows a side view, and
Fig. 2 shows a plan, of the to and fro moving separator, of a threshing Machine,
with our improvements attached.
a and a¹ are the straw-shakers.
b is the special shaking perforated table.
c is the receiving and guiding board, for the grain.
d is the sifting frame.
e, e are curved moving bars of the strawshaker a.
fis the wood crossbar of the shaking table.

page_text: 9, 9 are the bars of the shaking table.
is the wood support of the delivery frame c.
As shewn in the drawings, we attach to the end of the present straw shakers a, the
curved moving carriers e, on which we place in a row to any required extent, the
bars g, and bind the whole together by the crossbar f.
The upper sides of the curved carriers e, are connected together by the bars 9,
which are fastened thereto, and thus form together the grating or screening table b
which shakes or vibrates in unison with a. Instead of the grating a seive may be
employed if preferred. Beneath the curved carriers e, the guiding board C, is
fastened and it is also connected to the shakers a, through the wooden supports h.
The shakers a¹ are not connected to the shaking table b, and they differ from the
shakers a, in being tapered at the point. The mode of working our combined shaking-
table and separator as follows.
All straw which is shaken by the straw-shakers a a¹ when thrown out or forwards
falls upon the special grating or screening table b, which moves to-and-fro in direct
relation with the shakers a, whose motion it follows, and the straw is then again
shaken and thrown forward.
The grain gained by this after shaking falls through the open grating g, upon the
lower board c. The board in consequence of its connection with the shakers a,
follows the motion thereof and the corn is directed onwards to the usual perforated
receptacle for further treatment.
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,
In threshing machines as at present constructed, the addition of the shaking-table b,
formed of a grating, or seive, to the end of the shakers a, in order that any
imperfectly shaken straw may be again shaken, whereby any corn remaining in the
straw is separated. The corn so gained falling on the guiding board c and being
directed onward for further treatment as herein explained and set-forth.
Dated this 29th day of October 1888.
S. S. BROMHEAD,
97, Newgate Street, E.C.,
Patent Agent.